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1

INFLUENCIA DEL RECUBRIMIENTO SUPERFICIAL SOBRE LAS PRESTACIONES FRENTE AL DESGASTE Y LA FATIGA DE UNA ALEACIÓN DE ALUMINIO 7075  

Microsoft Academic Search

Resumen. En este trabajo se analiza el efecto ejercido por tres tipos de recubrimientos superficiales sobre las prestaciones frente al desgaste y la fatiga de una aleación de aluminio 7075, en estado T6, solubilización y maduración al pico de máxima resistencia. Los recubrimientos analizados fueron la deposición mediante la técnica de PVD de una capa de bisulfuro de molibdeno dopada

D. González; M. Brizuela; G. Atxaga; A. M. Irisarri; B. Zamorano

2

Engineering Assessment of Vermicomposting Municipal Wastewater Sludges.  

National Technical Information Service (NTIS)

Vermicomposting -- the biological degradation of organic matter that occurs as earthworms feed on waste materials -- has been advocated by some as a means of stabilizing and disposing of municipal wastewater sludges. Vermicomposting is being attempted on ...

1981-01-01

3

ENGINEERING ASSESSMENT OF VERMICOMPOSTING MUNICIPAL WASTEWATER SLUDGES  

EPA Science Inventory

Vermicomposting -- the biological degradation of organic matter that occurs as earthworms feed on waste materials -- has been advocated by some as a means of stabilizing and disposing of municipal wastewater sludges. Vermicomposting is being attempted on an experimental scale, th...

4

Enriching vermicompost by nitrogen fixing and phosphate solubilizing bacteria  

Microsoft Academic Search

The effect of inoculation of vermicompost with nitrogen-fixing Azotobacter chroococcum strains, Azospirillum lipoferum and the phosphate solubilizing Pseudomonas striata on N and P contents of the vermicompost was assessed. Inoculation of N2 fixing bacteria into vermicompost increased contents of N and P. Enriching vermicompost with rock phosphate improved significantly the available P when inoculated with P. striata. During the incubation

Vivek Kumar; K. P. Singh

2001-01-01

5

COMPENDIUM ON SOLID WASTE MANAGEMENT BY VERMICOMPOSTING  

EPA Science Inventory

Vermicomposting of municipal solid wastes has been attempted only in the last five years and there are presently no full-scale operations. This report assesses the technical and economic feasibility of vermicomposting and is based on several pilot-scale studies conducted by priva...

6

Compendium on Solid Waste Management by Vermicomposting.  

National Technical Information Service (NTIS)

Vermicomposting of municipal solid wastes has been attempted only in the last five years and there are presently no full-scale operations. This report assesses the technical and economic feasibility of vermicomposting and is based on several pilot-scale s...

1980-01-01

7

Vermicompost as a Biological Soil Amendment  

Microsoft Academic Search

\\u000a The viability of using earthworms as a treatment technique for the biological wastes producing organic fertilizers. A variety\\u000a of organic solid wastes, domestic and agro-industrial, can be vermicomposted. Vermicomposting technology involves harnessing\\u000a earthworms as versatile natural bioreactors, which play a vital role in decomposition of organic matter, maintaining soil\\u000a fertility, and bringing out efficient natural recycling and enhanced plants’ growth.

J. Tajbakhsh; E. Mohammadi Goltapeh; Ajit Varma

8

Vermicompost derived from different feedstocks as a plant growth medium.  

PubMed

This study determined feedstock effects on earthworm populations and the quality of resulting vermicomposts produced from different types of feedstocks using different vermicomposting durations. Feedstock combinations (Kitchen Paper Waste (KPW), Kitchen Yard Waste (KYW), Cattle Manure Yard Waste (CMY)), three durations of vermicomposting (45, 68 or 90 days), and two seed germination methods (with two concentrations of vermicompost) for radish, marigold and upland cress, served as the independent variables. The worms (Eisenia fetida) doubled their weight by day 68 in KPW and CMY vermicomposts and day 90 KPW vermicompost produced the greatest weight of worms. The direct seed germination method (seeding into soil or vermicompost-soil mixtures) indicated that KPW and KYW feedstocks decreased germination compared to the control, even in mature vermicompost. Seed germination was greater in the water extract method; however, most of the vermicompost extracts suppressed germination of the three seed species compared to the water controls. Vermicomposts from all three feedstocks increased leaf area and biomass compared to the control, especially in the 10% vermicompost:soil mix. Thus, seed germination and leaf area or plant biomass for these three species are contrasting vermicompost quality indicators. PMID:20153632

Warman, P R; Anglopez, M J

2010-06-01

9

Effect of pre-composting on vermicomposting of kitchen waste  

Microsoft Academic Search

The aim of this work was to test combination of the thermocomposting and vermicomposting to improve the treatment efficiency and assess the optimum period required in each method to produce good quality compost. The results showed that pre-thermocomposting improved vermicomposting of kitchen waste. A 9-day thermocomposting prior to vermicomposting helped in mass reduction, moisture management and pathogen reduction.

Jaya Nair; Vanja Sekiozoic; Martin Anda

2006-01-01

10

Ammonia emissions during vermicomposting of sheep manure.  

PubMed

The effect of C:N ratio, temperature and water content on ammonia volatilization during two-phase composting of sheep manure was evaluated. The aerobic phase was conducted under field conditions. This was followed by Phase II, vermicomposting, conducted in the laboratory under controlled conditions of water content (70% and 80%) and temperature (15 and 22 °C). The addition of extra straw lead to a 10% reduction in NH3 volatilization compared to sheep manure composted without extra straw. Temperature and water content significantly effected ammonia volatilization at 0 day in Phase II, with a water content of 70% and temperature of 22 °C leading to greater losses of ammonia. Nitrogen loss by ammonia volatilization during vermicomposting ranged from 8% to 15% of the initial N content. The addition of extra straw did not result in significant differences in total carbon content following vermicomposting. PMID:21996478

Velasco-Velasco, Joel; Parkinson, Robert; Kuri, Victor

2011-12-01

11

Stabilization of primary sewage sludge during vermicomposting  

Microsoft Academic Search

In India, over the last few decades, there has been a remarkable increase in sewage sludge production due to population increase and unplanned urbanization. The aim of the present study was to investigate the ability of an epigeic earthworm Eisenia foetida to transform primary sewage sludge (PSS) amended with cow dung (CD) into value added product, i.e., vermicompost in laboratory

Renuka Gupta; V. K. Garg

2008-01-01

12

Soil agro-ecological management: Fertirrigation and vermicompost treatments  

Microsoft Academic Search

A particular wormcasting (vermicompost from biological sludges) and sewage water (from a municipal sewage plant) have been employed in an ecological strategy for the conservation of arable soils. A soil sampled in the south of Italy (Matera), seeded with Avena sativa was used in experiments on: (1) direct incorporation of vermicompost into the soil (VC treatment) and (2) fertirrigation with

G. Masciandaro; B. Ceccanti; C. Garcia

1997-01-01

13

Vermicomposting of biosolids with cow manure and oat straw  

Microsoft Academic Search

Biosolids, mainly from textile industries and the rest from households, were vermicomposted with Eisenia fetida, cow manure and oat straw for 2 months at three different moisture contents (60%, 70% and 80% dry weight base) in triplicate to reduce pathogens and toxic organic compounds, and to find the best medium for growth of E. fetida. The vermicompost with the best

S. M. Contreras-Ramos; E. M. Escamilla-Silva; L. Dendooven

2005-01-01

14

Feasibility of nutrient recovery from industrial sludge by vermicomposting technology  

Microsoft Academic Search

Transformation of industrial sludges into vermicompost is of double interest: on the one hand, a waste is converted into value added product, and, on the other, it controls a pollutant that is a consequence of increasing industrialization. This paper reports the feasibility of utilization of vermicomposting technology for nutrient recovery from industrial sludge in laboratory scale experiment employing Eisenia fetida

Anoop Yadav; V. K. Garg

2009-01-01

15

Vermicomposting of crop residues and cattle dung with Eisenia foetida  

Microsoft Academic Search

We studied vermicomposting with Eisenia foetida of mustard residues and sugarcane trash mixed with cattle dung in a 90-day composting experiment. Vermicomposting resulted in significant reduction in C:N ratio and increase in mineral N, after 90 days of composting, over treatments uninoculated with earthworms. Microbial activity, as measured by dehydrogenase assay, increased up to 60 days and declined on further

Sudha Bansal; K. K Kapoor

2000-01-01

16

Suppression of insect pest populations and damage to plants by vermicomposts  

Microsoft Academic Search

The effects of commercial vermicomposts, produced from food waste, on infestations and damage by aphids, mealy bugs and cabbage white caterpillars were studied in the greenhouse. Vermicomposts were used at substitution rates into a soil-less plant growth medium, MetroMix 360 (MM360), at rates of 100% MM360 and 0% vermicompost, 80% MM360 and 20% vermicompost, and 60% MM360 and 40% vermicompost

Norman Q. Arancon; Paola A. Galvis; Clive A. Edwards

2005-01-01

17

Processing of different types of organic wastes through vermicomposting.  

PubMed

In the present study, an effort has been made to utilize different types of organic wastes, i.e. kitchen waste, agro residue, institutional waste and cow dung through the process of vermicomposting. These organic wastes were collected separately, air dried, grinded and mixed in 4:1 ratio with cow dung (w/w). During the period of vermicomposting (75 days), different physico-chemical parameters were analyzed separately. During this process, pH, organic carbon, organic matter and C:N ratio of different organic waste mixtures showed a declining trend, however, total nitrogen, available phosphorus and exchangeable potassium contents showed increasing trend with the advancement of vermicomposting period. Besides, physico-chemical investigations of these wastes, estimation of earthworm population, biomass and number of cocoon produced during vermicomposting were also analyzed separately. It was found that earthworm population, biomass and cocoon production increased significantly as the duration of vermicomposting process increased upto 75 days. PMID:23029940

Bharadwaj, Alok

2011-07-01

18

Qualitative analysis of the stability of a continuous vermicomposting system.  

PubMed

A mathematical model was established to describe ecological relationships in a continuous vermicomposting system. The distributions of organic matter, microbes and earthworms on non-dimensional specific growth rates were simulated. The range of specific growth rates were visualized utilizing three-dimensional reconstruction technology. The stability of a vermicomposting system was not influenced by the initial concentrations of microbes and earthworms, only their species. The coordinates of the stable point depended on the dilution rate and initial amount of organic matter. The method described could be help for establishing a stable continuous vermicomposting system. PMID:23127841

Hu, Enzhu; Liu, Hong

2012-12-01

19

[Effects of sewage sludge vermicompost on the growth of marigold].  

PubMed

The 1:1, 2:1, 3:1, 4:1, 5:1, and 1:0 mixtures of sewage sludge and cattle dung were treated with earthworm Eisenia foetida, and then, mixed with black soil in the proportions of 10%, 20%, and 30% (dry mass) to investigate the effects of the vermicompost on the marigold plant height, stem diameter, leaf number, branch number, aboveground biomass, underground biomass, ratio of root to shoot, flower bud number, flower yield, flower diameter, and flower biomass. An obvious promotion effect of the vermicompost was observed on the growth of marigold. The smaller the ratio of sewage sludge to cattle dung, the better the growth of marigold; while a higher proportion of the vermicompost to soil would inhibit the marigold growth. In this study, a proportion of 20% vermicompost to soil was the best for the growth of marigold. PMID:20707124

Ma, Li; Yin, Xiu-qin

2010-05-01

20

Vermicomposting potential of Perionyx sansibaricus (Perrier) in different waste materials  

Microsoft Academic Search

The decomposition efficiency of Perionyx sansibaricus (Perrier) for vermicomposting was evaluated by using a variety of wastes such as agriculture waste, farm yard manure and urban solid waste. Vermicomposting resulted in significant increase in total N (80.8–142.3%), phosphorous (33.1–114.6%) and potassium (26.3–125.2%), whereas decrease in organic C (14.0–37.0%) as well as C:N ratio (52.4–69.8%) in different experimental beddings. P. sansibaricus

Surendra Suthar

2007-01-01

21

Worms, Worms, and Even More Worms: A Vermicomposting Guide for Teachers.  

ERIC Educational Resources Information Center

This guide is designed to help teachers gain a better understanding of how to get a worm vermicomposting system started. It provides reference curricula materials for using worms in the classroom. Chapters include: (1) "Why Worm Vermicomposting;" (2) "Basics of Vermicomposting;" (3) "Worm Facts;" (4) "Classroom Activities;" (5) "Lab Activities;"…

California Integrated Waste Management Board, Sacramento.

22

VERMICOMPOSTING AS A NITROGEN SOURCE IN GERMINATING KIDNEY BEAN IN TRAYS  

Microsoft Academic Search

This study assessed the effectiveness of vermicompost as a germination media and nitrogen source for kidney bean Phaseolus vulgaris L. Five treatments were tested, based on the addition of increasing quantities of barren soil to vermicompost, and irrigated with four treatments of increasing urea-water solution. Chemical analysis of the different mixtures of vermicompost and barren soil were made. Percentage germination,

G. Rodríguez-Quiroz; W. Valenzuela-Quiñónez; E. Nava-Pérez

2011-01-01

23

Growth of bedding plants in commercial potting substrate amended with vermicompost  

Microsoft Academic Search

Vermicompost has been promoted as a viable alternative container media component for the horticulture industry. The purpose of this research was to investigate the use of vermicompost at different points in the production cycle of tomato, marigold, pepper, and cornflower. The incorporation of vermicompost of pig manure origin into germination media up to 20% v\\/v enhanced shoot and root weight,

G. R. Bachman; J. D. Metzger

2008-01-01

24

Comparison of Vermicompost and Composts as Potting Media for Growth of Tomatoes  

Microsoft Academic Search

Vermicomposting and composting are efficient methods for converting solid wastes to useful products. Incorporation of composts and vermicomposts into potting and container media is a potential use for these materials. In a greenhouse trial, effects of a vermicompost produced from raw dairy manure (RDM) along with some other composts produced from tobacco residue (TR), yard leaf (YL), sewage sludge + rice hull

K. Hashemimajd; M. Kalbasi; A. Golchin; H. Shariatmadari

2004-01-01

25

Agricultural use of leachates obtained from two different vermicomposting processes.  

PubMed

The objective of this paper was to investigate the possible agricultural use of the vermicomposting process leachates. Two leachates coming, respectively, from the vermicomposting of cow dung (SCD) and the vermicomposting of green forages (SGF), as well as solution of Hewitt (C) were used at a dose of 1 ml 500 ml(-1) in the foliar fertilization of tomato plants. Treatments were applied 30, 60 and 90 days after planting (DAP). The obtained results showed that foliar fertilization with SCD and SGF increased the morphological and chemical parameters on tomato crop with respect to the plants receiving foliar treatment with SH and C, possibly due to the humic substances content in SCD and SGF. The higher content of humic substances in SGF with respect to the SCD are possibly the responsible of the higher chlorophyll contents observed in the plants receiving the former treatment. This aspect possibly promoted an increase in plant photosynthesis and therefore an increase in fruit quality. PMID:18215517

Tejada, M; Gonzalez, J L; Hernandez, M T; Garcia, C

2008-09-01

26

Management of food industry waste employing vermicomposting technology.  

PubMed

This paper reports the vermicomposting of food industry sludges (FIS) mixed with different organic wastes employing Eisenia fetida. A total of 10 vermicomposting units containing different wastes combinations were established. After 15 weeks significant increase in total nitrogen (N(total)) (60-214%), total available phosphorous (P(avail)) (35.8-69.6%), total sodium (Na(total)) (39-95%), and total potassium (K(total)) (43.7-74.1%), while decrease in pH (8.45-19.7%), total organic carbon (OC(total)) (28.4-36.1%) and C:N ratio (61.2-77.8%) was recorded. The results indicated that FIS may be converted into good quality manure by vermicomposting if spiked with other organic wastes in appropriate quantities. PMID:22197330

Garg, V K; Suthar, S; Yadav, Anoop

2012-12-01

27

Isolation and identification of fungal communities in compost and vermicompost  

Microsoft Academic Search

This research illustrates the qualitative and quantitative composition of the mycoflora of both a green compost (thermophilically produced from plant debris) and a vermicompost (mesophili- cally produced by the action of earthworms on plant and animal wastes after thermophilic precondition- ing). Fungi were isolated using three media (PDA, CMC, PDA plus cycloheximide), incubated at three temperatures (24, 37 and 45

Antonella Anastasi; G. C. Varese; V. Filipello Marchisio

2005-01-01

28

Bioconversion of herbal industry waste into vermicompost using an epigeic earthworm Eudrilus eugeniae.  

PubMed

The aim of the present study was to investigate the potential of bioconversion of industrial herbal waste to vermicompost using Eudrilus eugeniae. Vermibeds were made using a mixture of herbal waste and cowdung (1?:?1) in comparison with the use of cowdung alone as substrate, resulting in vermicomposts 1 and 2, respectively. Different parameters were studied and it was observed that the nutrient profile of vermicompost 1 strongly influenced the growth of pea (Pisum sativum) and marigold plant (Tagetus erectus). The dry and fresh weight of shoots and roots, number of flowers, total yield in terms of fruit showed significant increase with vermicompost 1. Furthermore, vermicompost 1 (herbal waste and cow dung as substrate) resulted in a significant reduction in TOC by 58% in comparison with vermicompost 2 (cowdung as substrate). The C?:?N ratio was less than 20 in vermicompost 1 as well as in vermicompost 2, which indicated an advanced degree of stabilization and mineralization. The ability of earthworms to survive, grow and breed in the vermibed fed with the herbal waste indicates the sustainability and efficiency of a heterogeneous kind of organic waste. The results of the study suggested that bulk industrial herbal waste can be utilized as a substrate for vermicomposting and this can be proposed as an alternative for waste disposal in a clean green manner, promoting the concept of organic farming. PMID:20952444

Kumari, Mamta; Kumar, Sudhir; Chauhan, Rajinder Singh; Ravikanth, K

2011-11-01

29

Copper, Nickel and Zinc Accumulations in Lettuce Grown in Soil Amended with Contaminated Cattle Manure Vermicompost after Sequential Cultivations  

Microsoft Academic Search

The Cu, Ni and Zn accumulations in leaves and roots of lettuce (Lactuca sativa L) grown in soil amended with natural and contaminated cattle manure vermicompost were evaluated. The vermicompost residues containing relatively high metal concentrations used in this work were obtained from a previous experiment, in which vermicompost were applied to removing metals from electroplating wastes. Sequential lettuce cultivations

Cláudio P. Jordão; Renato P. de Andrade; Aloísio J. B. Cotta; Paulo R. Cecon; Júlio C. L. Neves; Raphael B. A. Fernandes; Mauricio P. F. Fontes

2012-01-01

30

REMOVAL OF Cu, Cr, Ni, Zn, AND Cd FROM ELECTROPLATING WASTES AND SYNTHETIC SOLUTIONS BY VERMICOMPOST OF CATTLE MANURE  

Microsoft Academic Search

This study was undertaken to evaluate the retention of Cu, Cr, Ni, Zn, and Cd under laboratory conditions from synthetic solution and electroplating wastes by vermicompost. A glass column was loaded with vermicompost, and metal solutions were passed through it. Metal concentrations were then measured in the eluate in order to evaluate the amounts retained by the vermicompost. Measurements of

Cláudio Pereira Jordão; Madson de Godoi Pereira; Rosilene Einloft; Marlete Bastos Santana; Carlos Roberto Bellato; Jaime Wilson Vargas de Mello

2002-01-01

31

Ethylene removal evaluation and bacterial community analysis of vermicompost as biofilter material  

Microsoft Academic Search

Biofiltration of ethylene provides an environmentally friendly and economically beneficial option relative to physical\\/chemical removal, where selection of appropriate bed material is crucial. Here the vermicompost with indigenous microorganisms as bed material was evaluated for ethylene removal through batch test and biofilter experiment. Temporal and spatial dynamics of bacterial community in the vermicompost-biofilter under different ethylene loads were characterized by

Yuming Fu; Lingzhi Shao; Hui Liu; Ling Tong; Hong Liu

2011-01-01

32

Direct Vermicomposting of Fresh Sewage Sludge by Using Two Epigeic Earthworm Species  

Microsoft Academic Search

Direct vermicomposting of fresh sewage sludge by two epigeic earthworm species (Eisenia foetida and Bimastus parvus) was conducted in a lab-scale experimental setup, and the performance was evaluated. The results showed that it was feasible to use both E. fetida and B. parvus to convert fresh sewage sludge without any pretreatment and blending into good quality fertilizer. Direct vermicomposting resulted

Xuemin Chen; Xiaoyong Fu

2010-01-01

33

Influence of vermicompost on soil chemical and physical properties in tomato (Lycopersicum esculentum) field  

Microsoft Academic Search

-1 ) were incorporated into the top 15 cm of soil. The soil sampling and measurements carried out 3 months after the application of vermicompost in soil and the soil samples were collected from depth of 15 cm. ? The results showed that addition of vermicompost at rate of 15 t ha -1 significantly (P < 0.05) increased? contents of

Rasool Azarmi; Mousa Torabi Giglou; Rahim Didar Taleshmikail

2008-01-01

34

Treated-cassava peel vermicomposts enhanced earthworm activities and cowpea growth in field plots  

Microsoft Academic Search

The peels of bitter cassava (Manihot utilissima) root, a major source of food carbohydrate in the tropics, though rich in nutrients, form toxic wastes lethal to soil invertebrates and can inhibit root growth. Recent investigations highlighted the ability of the earthworm, Eudrilus eugeniae (Eug) to partially detoxify the toxic wastes, and transform the cassava peels into valuable vermicompost. Vermicomposting and

1996-01-01

35

Effects of stocking density and feeding rate on vermicomposting of biosolids  

Microsoft Academic Search

The double-pronged problem of quantity, and disposal of waste streams from a myriad of industries, is becoming increasingly acute, the world over. The use of earthworms as a waste treatment technique for such wastes is gaining popularity. This method is commonly known as vermicomposting. Compared to conventional microbial composting, vermicomposting produces a product that is more or less homogenous, with

P. M' Ndegwa; S. A. Thompson; K. C Das

2000-01-01

36

Vermicomposting of mixed solid textile mill sludge and cow dung with the epigeic earthworm Eisenia foetida  

Microsoft Academic Search

This paper reports the results of a study of vermicomposting with Eisenia foetida of solid textile mill sludge mixed with cow dung in different ratios in a 90 days composting experiment. Vermicomposting resulted in significant reduction in C:N ratio and increase in TKN. Total K and Ca were lower in the final cast than the initial feed mixture. Microbial activity

Priya Kaushik; V. K. Garg

2003-01-01

37

Mechanism of metribuzin herbicide sorption by humic acid samples from peat and vermicompost  

Microsoft Academic Search

Humic acids (one derived from vermicompost, originating from animal manure and treated with the earthworm Eisenia foetida or Lumbricus rubellus, and the other originating from peat) were characterized in respect of their major elemental UV-Vis spectroscopy and acidity. Humic acid, isolated from vermicompost (VHA), was compared with the humic acid sample extracted from peat (PHA) in respect of its chemical

Maria Diva Landgraf; Sebastião Claudino da Silva; Maria Ol??mpia de O. Rezende

1998-01-01

38

Influences of vermicomposts on field strawberries: 1. Effects on growth and yields  

Microsoft Academic Search

Vermicomposts processed commercially from food wastes and paper wastes were applied, to 4.5 m2 field plots, under high plastic hoop tunnels, at rates of 5 or 10 tha?1 to evaluate their effects on the growth and yields of strawberries (Fragaria ananasa) var. `Chandler'. The vermicomposts were incorporated into the top 10 cm of soil and supplemented, based on chemical analyses,

N. Q. Arancon; C. A. Edwards; P. Bierman; C. Welch; J. D. Metzger

2004-01-01

39

Feasibility of utilization of horse dung spiked filter cake in vermicomposters using exotic earthworm Eisenia foetida  

Microsoft Academic Search

This contribution reports the potential of vermicomposting technology in the management of horse dung (HD) spiked sugar mill filter cake (SMFC) using an epigeic earthworm Eisenia foetida under laboratory conditions. A total of six vermicomposters filled with different ratios of HD and SMFC were maintained for this study. The growth and fecundity of E. foetida was monitored for 12 weeks.

Pritam Sangwan; C. P. Kaushik; V. K. Garg

2008-01-01

40

The treatment of domestic wastewater using small-scale vermicompost filter beds  

Microsoft Academic Search

The aim of this study is to quantify the effect of filter bed depth and solid waste inputs on the performance of small-scale vermicompost filter beds that treat the soluble contaminants within domestic wastewater. The study also aims to identify environmental conditions within the filters by quantifying the oxygen content and pH of wastewater held within it. Vermicompost is being

M Taylor; W. P Clarke; P. F Greenfield

2003-01-01

41

Hydrolytic enzyme activities of extracted humic substances during the vermicomposting of a lignocellulosic olive waste  

Microsoft Academic Search

Humic substances and three hydrolytic enzymes (?-glucosidase, phosphatase and urease) were extracted by neutral sodium pyrophosphate from an olive waste (dry olive cake), alone or mixed with municipal biosolids, during a nine month vermicomposting process. Easily degradable compounds decreased during the vermicomposting process because of microbial consumption. When municipal biosolids were added to dry olive cake, microbial activity increased and

E. Benitez; H. Sainz; R. Nogales

2005-01-01

42

Feasibility of vermicomposting for vegetable greenhouse waste recycling.  

PubMed

This study was conducted in order to evaluate the feasibility of Eisenia andrei for vermicomposting heterogeneous-plant (HP), tomato-plant (P), and damaged tomato-fruit (T) greenhouse vegetable wastes. Earthworm growth and reproduction were monitored over a 12-week period, and variations in chemical parameters, enzyme activity, phytotoxicity test, and genetic fingerprinting of bacterial communities were evaluated. While high rates of salinity prevented earthworm survival in HP and P (>10 dS m(-1)), T was vermicomposted recording an adequate earthworm growth and cocoon production. The latter waste was successfully stabilized, as indicated by the significant decrease in its TOC content ( approximately 13-26%) and C:N ratio ( approximately 16-36%) and its high germination indices ( approximately 39-72%). The similar enzyme activities levels and bacterial community fingerprintings recorded in diverse vermicomposts obtained from T waste indicate that this type of waste favoured the existence of analogous bacterial communities responsible for the high degree of stabilization and maturity detected. PMID:20727739

Fernández-Gómez, Manuel J; Romero, Esperanza; Nogales, Rogelio

2010-12-01

43

Changes in fungal population of fly ash and vinasse mixture during vermicomposting by Eudrilus eugeniae and Eisenia fetida: documentation of cellulase isozymes in vermicompost.  

PubMed

Fly ash (FA) and vinasse (VN), two industrial wastes, are generated in huge amounts and cause serious hazards to the environment. In this experiment, different proportions of these two wastes were used as food for two epigeic earthworms (Eisenia fetida and Eudrilus eugeniae) to standardize the recycling technique of these two wastes and to study their effect on fungal especially cellulolytic fungal population, cellulase activity and their isozyme pattern, chitin content and microbial biomass of waste mixture during vermicomposting. Increasing VN proportion from 25% to 50% or even higher, counts of both fungi and cellulolytic fungi in waste mixtures were significantly (P ? 0.05) increased during vermicomposting. Higher cellulase activity in treatments having 50% or more vinasse might be attributed to the significantly (P ? 0.05) higher concentration of group I isozyme while concentrations of other isozymes (group II and III) of cellulase were statistically at par. Higher chitin content in vinasse-enriched treatments suggested that fungal biomass and fungi-to-microbial biomass ratio in these treatments were also increased due to vermicomposting. Results revealed that Eudrilus eugeniae and Eisenia fetida had comparable effect on FA and VN mixture during vermicomposting. Periodical analysis of above-mentioned biochemical and microbial properties and nutrient content of final vermicompost samples indicated that equal proportion (1:1, w/w) of FA and VN is probably the optimum composition to obtain best quality vermicompost. PMID:21277188

Pramanik, Prabhat; Chung, Young Ryun

2011-06-01

44

Effects of a precomposting step on the vermicomposting of dairy manure-waste paper mixtures.  

PubMed

Thermophilic composting is being promoted as a means of sanitizing waste materials prior to vermicomposting. The precomposting duration is, however, critical to the success of the vermicomposting phase as it affects worm biomass. This study evaluated the effectiveness of different precomposting periods (0, 1, 2, 3 and 4 weeks) on the sanitization and vermicomposting of dairy manure-waste paper mixtures. The parameters measured were coliform bacteria and protozoa oocyst numbers, earthworm growth, as well as stabilization and nutrient content of vermicomposts. Over 95% of fecal coliforms, Escherichia coli and of E. coli 0157 were eliminated from the waste materials within 1 week of precomposting and total elimination of these and protozoan oocysts was achieved after 3 weeks of precomposting. Microbial biomass carbon and water soluble carbon of waste mixtures decreased with increase in precomposting time and impacted negatively on earthworm growth and subsequent stabilization of the dairy manure-paper waste mixtures. Vermicomposts from waste mixtures precomposted for over 2 weeks were less stabilized, less humified and had lower nutrient contents than vermicomposts from waste mixtures precomposted for 1 week or less. A precomposting period of 1 week was found to be ideal for the effective vermicomposting of dairy manure-waste paper mixtures. PMID:20421247

Mupondi, Lushian T; Mnkeni, Pearson N S; Muchaonyerwa, Pardon

2011-02-01

45

Hygienic quality of faeces treated in urine diverting vermicomposting toilets.  

PubMed

On-site sanitation solutions have gained much interest in recent years. One such solution is the urine diverting vermicomposting toilet (UDVT). This study evaluated the hygienic quality of the composted material in six UDVTs in operation in France. Samples were taken from three sampling positions in each toilet, with increasing distance from the fresh material. The concentration of Salmonella spp., Enterococcus spp., thermotolarent coliforms and coliphages were analysed and plotted against a number of variables. The variables found to have the greatest impact was the pH (for Enterococcus spp. and thermotolarent coliforms (TTC)) and time since last maintenance (coliphages). The pH was found to correlate with the material maturity. The current practise of maintenance can cause recontamination of the stabilised material and increase the risk of regrowth of pathogenic microorganisms. A modification in the maintenance procedure, in which a fourth maturation point is introduced, would eliminate this risk. UDVTs were found to be a good on-site sanitation option as the maintenance requirement is small and the system effectively reduced odour and concentration of pathogen and indicator organisms in human waste while keeping the accumulation of material down to a minimum. If the vermicompost is to be used for crops consumed raw, an additional sanitisation step is recommended. PMID:23932466

Lalander, Cecilia H; Hill, Geoffrey B; Vinnerås, Björn

2013-11-01

46

Dynamics of microbial communities related to biochemical parameters during vermicomposting and maturation of agroindustrial lignocellulose wastes.  

PubMed

Scarce information is available on the changes in abundance of microbial taxa during vermicomposting. Quantitative PCR and DGGE analysis were used to monitor variations in the microbial structure, relative abundance of four bacterial classes and fungi over the vermicomposting and maturation period of wet olive cake (O) and vine shoots (W). Multivariate correlation analysis between microbial structure and abundance, earthworm biomass and enzyme activities revealed similar and divergent interactions in both processes. Although Eisenia fetida development was different, significant correlations were found with ?-glucosidase activity and with bacterial and fungal structure. In the vermicomposting period of O and W, a decline was found in bacteria (94% and 77%), fungi (93% and 94%), and Gammaproteobacteria (56% and 71%) but an increase in Betaproteobacteria and Actinobacteria (62-79%). Alphaproteobacteria increased only in O (26%). Despite the different initial lignocellulose wastes, the mature vermicomposts were similar in microbial and biochemical properties. PMID:23948272

Castillo, Jean Manuel; Romero, Esperanza; Nogales, Rogelio

2013-10-01

47

Vermicomposting of wastewater sludge from paper-pulp industry with nitrogen rich materials  

Microsoft Academic Search

The vermicomposting of pulp mill sludge mixed with sewage sludge, pig slurry and poultry slurry at different ratios was studied. Eisenia andrei (Bouché, 1972) showed high growth rates and high mortalities in all the mixtures considered.

C. Elvira; L. Sampedro; J. Dominguez; S. Mato

1997-01-01

48

Chemical and spectroscopic characterization of water extractable organic matter during vermicomposting of cattle dung.  

PubMed

This work illustrated the characteristics and transformation of water extractable organic matter (WEOM) during vermistabilization (Eisenia fetida) of cattle dung by means of chemical and spectroscopic methods. The independent experiment conducted in triplicate was sampled at the 0, 7, 14, 21, 35, 60 and 90days. Results showed that the DOC kept steady around 2.7gkg(-1) after day 60 and the DOC/DON ratio decreased from 19.77 to 5.26 till the end of vermicomposting. On the other hand, vermicomposting decreased the aliphatic, proteinaceous, carbohydrates components and increased the aromaticity and oxygen-containing functional groups in the WEOM. Moreover, fluorescence spectra and fluorescence regional integration (FRI) results indicated that protein-like groups were degraded and fulvic and humic acid-like compounds were evolved during the vermicomposting process. In all, this study suggested the suitability of WEOM for monitoring the organics transformation and assessing the maturity in the vermicomposting. PMID:23416619

Lv, Baoyi; Xing, Meiyan; Yang, Jian; Qi, Wensheng; Lu, Yongsen

2013-03-01

49

High-rate composting–vermicomposting of water hyacinth ( Eichhornia crassipes, Mart. Solms)  

Microsoft Academic Search

In an attempt to develop a system with which the aquatic weed water hyacinth (Eichhornia crassipes, Mart. Solms) can be economically processed to generate vermicompost in large quantities, the weed was first composted by a `high-rate' method and then subjected to vermicomposting in reactors operating at much larger densities of earthworm than recommended hitherto: 50, 62.5, 75, 87.5, 100, 112.5,

S Gajalakshmi; E. V Ramasamy; S. A Abbasi

2002-01-01

50

Neem leaves as a source of fertilizer-cum-pesticide vermicompost  

Microsoft Academic Search

Vermicomposting of neem (Azadirachta indica A. Juss) was accomplished in ‘high-rate’ reactors operated at the earthworm (Eudrilus eugeniae) densities of 62.5 and 75 animals per litre of reactor volume. Contrary to the fears that neem––a powerful nematicide––might not be palatable to the annelids, the earthworms fed voraciously on the neem compost, converting upto 7% of the feed into vermicompost per

S. Gajalakshmi; S. A. Abbasi

2004-01-01

51

Vermicompost as natural adsorbent for removing metal ions from laboratory effluents  

Microsoft Academic Search

The use of vermicompost as an adsorbent to remove Cd(II), Cu(II), Pb(II) and Zn(II) ions from laboratory effluents is proposed. Parameters such as adsorption pH, vermicompost amount, flow rate and particle size range were studied. An optimum pH range (2.5–5.0) was found for metal removal. The flow rate affected only slightly the removal of Cd(II) ions (about 10%). A decrease

G. D Matos; M. A. Z Arruda

2003-01-01

52

Livestock excreta management through vermicomposting using an epigeic earthworm Eisenia foetida  

Microsoft Academic Search

In India, millions of tones of livestock excreta are produced. Our study explores the potential of an epigeic earthworm Eisenia foetida to compost different livestock excreta (cow, buffalo, horse, donkey, sheep, goat and camel) into value added product (vermicompost)\\u000a at the laboratory scale. Vermicomposting resulted in lowering of pH, electrical conductivity, potassium and C:N ratio and\\u000a increase in nitrogen and

V. K. Garg; Y. K. Yadav; Aleenjeet Sheoran; Subhash Chand; Priya Kaushik

2006-01-01

53

Vermicomposting of different types of waste using Eisenia foetida: A comparative study  

Microsoft Academic Search

A study (100 days duration) was conducted to evaluate the efficiency of an exotic earthworm species (epigeic—Eisenia foetida) for decomposition of different types of organic substrates (kitchen waste, agro-residues, institutional and industrial wastes including textile industry sludge and fibres) into valuable vermicompost. The percentage of, nitrogen, phosphorous and potassium in vermicompost was found to increase while pH and total organic

Payal Garg; Asha Gupta; Santosh Satya

2006-01-01

54

Municipal solid waste management through vermicomposting employing exotic and local species of earthworms  

Microsoft Academic Search

A comparative study was conducted between exotic and local (epigeic-Eisenia fetida and anaecic-Lempito mauritii, respectively) species of earthworms for the evaluation of their efficacy in vermicomposting of municipal solid waste (MSW). Vermicomposting of MSW for 42 days resulted in significant difference between the two species in their performance measured as loss in total organic carbon, carbon–nitrogen ratio (C:N) and increase

S Kaviraj; Satyawati Sharma

2003-01-01

55

Reduction of bioavailability and leachability of heavy metals during vermicomposting of water hyacinth.  

PubMed

Vermicomposting of water hyacinth is a good alternative for the treatment of water hyacinth (Eichhornia crassipes) and subsequentially, beneficial for agriculture purposes. The bioavailability and leachability of heavy metals (Zn, Cu, Mn, Fe, Ni, Pb, Cd, and Cr) were evaluated during vermicomposting of E. crassipes employing Eisenia fetida earthworm. Five different proportions (trials 1, 2, 3, 4, and 5) of cattle manure, water hyacinth, and sawdust were prepared for the vermicomposting process. Results show that very poor biomass growth of earthworms was observed in the highest proportion of water hyacinth (trial 1). The water soluble, diethylenetriaminepentaacetic acid (DTPA) extractable, and leachable heavy metals concentration (percentage of total heavy metals) were reduced significantly in all trials except trial 1. The total concentration of some metals was low but its water soluble and DTPA extractable fractions were similar or more than other metals which were present in higher concentration. This study revealed that the toxicity of metals depends on bioavailable fraction rather than total metal concentration. Bioavailable fraction of metals may be toxic for plants and soil microorganisms. The vermicomposting of water hyacinth by E. fetida was very effective for reduction of bioavailability and leachability of selected heavy metals. Leachability test confirmed that prepared vermicompost is not hazardous for soil, plants, and human health. The feasibility of earthworms to mitigate the metal toxicity and to enhance the nutrient profile in water hyacinth vermicompost might be useful in sustainable land renovation practices at low-input basis. PMID:23757026

Singh, Jiwan; Kalamdhad, Ajay S

2013-12-01

56

Recycling of lime sludge emanating from tannery industry through vermicomposting using Eisenia foetida.  

PubMed

The research was focused on the control of pollution, which is caused due to tannery waste disposal, through the process of vermicomposting. Earthworms have increasingly been used for waste management. Therefore, the main aim of this study was to recycle the lime sludge emanating from a selected tannery industry through vermicomposting. Tannery solid waste was allowed to compost for 60 days, and then the composts were harvested and analyzed for selected physio-chemical and biochemical parameters. A flowering plant namely Tagets erecta Linn was grown in soil mixed with the vermicomposts obtained, and was studied for its growth attributes and compared with the control plant growth on soil alone. The attributes studied were biometric parameters, like root length, shoot length, plant height, plant weight, number of leaves, flowers and buds. The alkaline nature of the lime sludge was reduced to neutral range on vermicomposting. The electrical conductivity of the lime sludge was also reduced on vermicomposting which might be due to the transformation of complex organic compounds into simpler forms. The biochemical parameters, such as nitrogen and carbon were also reduced on vermicomposting. PMID:24749206

Subash, Anitha; Gomathi, M; Kanagavalli, M; Sindhiya, D

2012-07-01

57

Impact of imidacloprid residues on the development of Eisenia fetida during vermicomposting of greenhouse plant waste.  

PubMed

Pesticide application in agriculture causes residues in post-harvest plant waste at different concentrations. Knowledge concerning how pesticide concentrations in such waste affect earthworms is essential for recycling greenhouse plant debris through vermicomposting. Here, we have evaluated the effects of imidacloprid (IMD) residues on earthworms (Eisenia fetida) during the vermicomposting of plant waste from greenhouse crops in Spain. Before, the effect of different IMD concentrations on earthworms was tested using cattle manure as an optimum waste for worm development. The results after using cattle manure indicate that IMD dose ? 5 mg kg(-1) hinders worm growth and even causes death, whereas IMD dose ? 2 mg IMD kg(-1) allows worm growth similar to control but impedes reproduction. The results from the vermicomposting of plant waste reveal that IMD inhibits adequate worm growth and increases mortality. Although 89% worms became sexually mature in substrate containing 2 mg IMD kg(-1), they did not produce cocoons. IMD also affected microorganisms harboured in the substrates for vermicomposting, as indicated by the reduction in their dehydrogenase activity. This enzyme activity was restored after vermicomposting. This study provides a sound basis for the vermicomposting of pesticide-contaminated plant waste. PMID:21775059

Fernández-Gómez, Manuel J; Romero, Esperanza; Nogales, Rogelio

2011-09-15

58

Influences of vermicomposts, produced by earthworms and microorganisms from cattle manure, food waste and paper waste, on the germination, growth and flowering of petunias in the greenhouse  

Microsoft Academic Search

Vermicomposts have been shown to promote the germination, growth, and yields of plants. This paper aims to demonstrate the effects of vermicomposts produced from three types of wastes on growth and flowering of petunias which are an important U.S. flowering crop.Vermicomposts, produced commercially from cattle manure, food wastes and paper wastes, were substituted at a range of different concentrations into

Norman Q. Arancon; Clive A. Edwards; Andrei Babenko; John Cannon; Paola Galvis; James D. Metzger

2008-01-01

59

Effect of the application of water hyacinth compost\\/vermicompost on the growth and flowering of Crossandra undulaefolia, and on several vegetables  

Microsoft Academic Search

The impact of the application of compost\\/vermicompost obtained from water hyacinth (Eichhornia crassipes, Mart. Solms) on plants was assessed in terms of growth and flowering of the angiosperm crossandra (Crossandra undulaefolia). Overall nine morphological, size, and yield attributes were studied in crossandra saplings raised on water hyacinth compost or vermicompost as compared to the untreated saplings. Application of vermicompost led

S Gajalakshmi; S. A Abbasi

2002-01-01

60

Changes in organic – C, N, P and K and enzyme activities in vermicompost of biodegradable organic wastes under liming and microbial inoculants  

Microsoft Academic Search

The aim of this work was to study the effect of different organic wastes, viz. cow dung, grass, aquatic weeds and municipal solid waste with lime and microbial inoculants on chemical and biochemical properties of vermicompost. Cow dung was the best substrate for vermicomposting. Application of lime (5g\\/kg) and inoculation of microorganisms increased the nutrient content in vermicompost and also

P. Pramanik; G. K. Ghosh; P. K. Ghosal; P. Banik

2007-01-01

61

Vermicomposting of milk processing industry sludge spiked with plant wastes.  

PubMed

This work illustrates the vermistabilization of wastewater sludge from a milk processing industry (MPIS) unit spiked with cow dung (CD), sugarcane trash (ST) and wheat straw (WS) employing earthworms Eisenia fetida. A total of nine experimental vermibeds were established and changes in chemical parameters of waste material have been observed for 90 days. Vermistabilization caused significant reduction in pH, organic carbon and C:N ratio and substantial increase in total N, available P and exchangeable K. The waste mixture containing MPIS (60%)+CD (10%)+ST (30%) and MPIS (60%)+CD (10%)+WS (30%) had better waste mineralization rate among waste mixtures studied. The earthworm showed better biomass and cocoon numbers in all vermibeds during vermicomposting operation. Results, thus suggest the suitability of E. fetida for conversion of noxious industrial waste into value-added product for land restoration programme. PMID:22609678

Suthar, Surindra; Mutiyar, Pravin K; Singh, Sushma

2012-07-01

62

Effects of vermicomposts produced from food waste on the growth and yields of greenhouse peppers.  

PubMed

Vermicomposts, produced commercially from food wastes, were substituted at a range of different concentrations into a soil-less commercial bedding plant container medium, Metro-Mix 360 (MM360), to evaluate their effects on the growth and yields of peppers in the greenhouse. Six-week-old peppers (Capsicum annum L. var. California) were transplanted into 100%, 80%, 60%, 40%, 20% or 10% MM360 substituted with 0%, 10%, 20%, 40%, 60%, 80% and 100% vermicompost. All plants were watered three times weekly with 200 ppm Peter's Nutrient Solution from the time of transplanting up to 107 days. Peppers grown in potting mixtures containing 40% food waste vermicomposts and 60% MM360 yielded 45% more fruit weights and had 17% greater mean number of fruits than those grown in MM360 only. The mean heights, numbers of buds and numbers of flowers of peppers grown in potting mixtures containing 10-80% vermicompost although greater did not differ significantly from those of peppers grown in MM360. There were no positive correlations between the increases in pepper yields, and the amounts of mineral-N and microbial biomass-N in the potting mixtures, or the concentrations of nitrogen in the shoot tissues of peppers. Factors such as: an improvement of the physical structure of the potting medium, increases in populations of beneficial microorganisms and the potential availability of plant growth-influencing-substances produced by microorganisms in vermicomposts, could have contributed to the increased pepper yields obtained. PMID:15051075

Arancon, Norman Q; Edwards, Clive A; Atiyeh, Rola; Metzger, James D

2004-06-01

63

Carbon and nitrogen mineralization in a vineyard soil amended with grape marc vermicompost.  

PubMed

Vineyard soils in many areas suffer from low organic matter contents, which can be the cause of negative effects such as increasing the risk of erosion, so the use of organic amendments must be considered a good agricultural practice. Even more, if grape marc is recycled as a soil amendment in the vineyards, benefits from a good waste management strategy are also obtained. In the present study, a grape marc from the wine region of Valdeorras (north-west Spain) was used for the production of vermicompost, and this added to a vineyard soil of the same area in a laboratory study. Mixtures of soil and grape marc vermicompost (2 and 4%, dry weight) were incubated for ten weeks at 25°C and the mineralization of C and N studied. The respiration data were fitted to a first-order kinetic model. The rates of grape marc vermicompost which should be added to the vineyard soil in order to maintain the initial levels of organic matter were estimated from the laboratory data, and found to be 1.7?t?ha(-1)?year(-1) of bulk vermicompost (if the present mean temperature is considered) and 2.1?t?ha(-1)?year(-1) of bulk vermicompost (if a 2°C increment in temperature is considered), amounts which could be obtained recycling the grape marc produced in the exploitation. PMID:20837558

Paradelo, Remigio; Moldes, Ana Belén; Barral, María Teresa

2011-11-01

64

Insight into the roles of earthworm in vermicomposting of sewage sludge by determining the water-extracts through chemical and spectroscopic methods.  

PubMed

This work illustrated the effects of earthworm in vermicomposting (Eisenia fetida) by determining the water-extracts through chemical and spectroscopic methods. A field experiment with sludge as the only feed was subjected to vermicomposting and the control (without worms) for three weeks. Compared to the control, vermicomposting resulted in lower pH and water-extractable organic carbon (WEOC) along with higher electrical conductivity (EC). Moreover, vermicomposting caused nearly two times higher content of water-extractable nitrate (WEN-NO3(-)) than the control. Furthermore, fourier transform infrared spectra (FT-IR) revealed that vermicomposting promoted the hydrolysis/transformation of macromolecular organic matters and accelerated the degradation of polysaccharide-like and protein-like materials. Fluorescence spectroscopy also reflected vermicomposting led to higher humification degree than the control. In all, this study supplies a new view to assess the roles of earthworm in vermicomposting of sewage sludge by evaluating the water extracts. PMID:24384315

Yang, Jian; Lv, Baoyi; Zhang, Jie; Xing, Meiyan

2014-02-01

65

Bioconversion of wastes from olive oil industries by vermicomposting process using the epigeic earthworm Eisenia andrei.  

PubMed

The present work evaluates the possible bioconversion of wet olive cake by low-cost biostabilization (vermicomposting process). Wet olive cake fresh (WOC), precomposted (WOCP), or mixed with biosolids (WOCB), were vermicomposted for 6 months to obtain organic amendments for agricultural and remediation purposes. The results showed initial differences depending on previous treatment. WOCP was initially more stable, presented a low C:N ratio, and showed more dehydrogenase and urease activity. By contrast, there was no dehydrogenase activity initially in WOC and WOCB, due to the presence of some different types of polyphenols. Finally, the end product showed relatively higher amounts of total nitrogen and humic acid and met the standard of quality for composts and vermicomposts for use both in conventional and organic agriculture and soil-restoration programs. PMID:20183054

Melgar, Raquel; Benitez, Emilio; Nogales, Rogelio

2009-06-01

66

Impact of fly ash and phosphatic rock on metal stabilization and bioavailability during sewage sludge vermicomposting.  

PubMed

Sewage sludge (SS) was mixed with different proportions of fly ash (FA) and phosphoric rock (PR), as passivators, and earthworms, Eisenia fetida, were introduced to allow vermicomposting. The earthworm growth rates, reproduction rates, and metal (except Zn and Cd) concentrations were significantly higher in the vermireactors containing FA and PR than in the treatments without passivators. The total organic carbon (TOC) and total metal concentrations in the mixtures decreased, and the mixtures were brought to approximately pH 7 during vermicomposting. There were significant differences in the decreases in the metal bioavailability factors (BFs) between the passivator and control treatments, and adding 20% FA (for Cu and Zn) or 20% PR (for Pb, Cd, and As) to the vermicompost were the most effective treatments for mitigating metal toxicity. The BF appeared to be dependent on TOC in the all treatments, but was not closely dependent on pH in the different vermibeds. PMID:23567692

Wang, Longmian; Zhang, Yimin; Lian, Jianjun; Chao, Jianying; Gao, Yuexiang; Yang, Fei; Zhang, Leiyan

2013-05-01

67

Changes of bacterial and fungal community compositions during vermicomposting of vegetable wastes by Eisenia foetida.  

PubMed

Changes of bacterial and fungal community during vermicomposting of vegetable wastes by hatchling, juvenile and adult Eisenia foetida were investigated through analysis of the extracted bacterial 16S rDNA and fungal 18S rDNA with quantitative polymerase chain reaction (PCR), denaturing gradient gel electrophoresis (DGGE) and sequencing. After 60days of composting, significantly lower values of microbial activity and bacterial and fungal densities were revealed in the products of composting with earthworms than in the control (without earthworms). PCR-DGGE images showed vermicomposting significantly enhanced the diversities of bacterial and fungal communities. However, for their structures, sequencing results revealed that, compared to the control where the bacterial Firmicutes were predominant, in the composts with earthworms, the bacterial Bacteroidetes and Actinomycetes, and the fungal Sordariomycetes were found dominant. In addition, some beneficial species of bacteria and fungi against pathogens were also isolated from the vermicomposting products. PMID:24177156

Huang, Kui; Li, Fusheng; Wei, Yongfen; Chen, Xuemin; Fu, Xiaoyong

2013-12-01

68

Potential of two epigeic and two anecic earthworm species in vermicomposting of water hyacinth  

Microsoft Academic Search

The potential of two epigeic species (Eudrilus eugeniae Kinberg, and Perionyx excavatus Perrier) and two anecic species (Lampito mauritii Kinberg and Drawida willsi Michaelson) of earthworms was assessed in terms of efficiency and sustainability of vermicomposting water hyacinth (Eichhornia crassipes, Mart. Solm.). In different vermireactors, each run in duplicate with one of the four species of earthworms, and 75 g

S Gajalakshmi; E. V Ramasamy; S. A Abbasi

2001-01-01

69

Pilot-scale vermicomposting of pineapple wastes with earthworms native to Accra, Ghana  

Microsoft Academic Search

Pineapple wastes, an abundant organic waste in Accra, Ghana, were vermicomposted using native earthworms (Eudrilus eugeniae Kinberg) collected from the banks of streams and around bath houses of this city. Triplicate pilot-scale vermidigesters containing about 90 earthworms and three other control boxes with no earthworms were fed pineapple pulp or peels, and the loss of wet mass was monitored over

Nana O. K. Mainoo; Suzelle Barrington; Joann K. Whalen; Luis Sampedro

2009-01-01

70

Using FAME profiles for the characterization of animal wastes and vermicomposts  

Microsoft Academic Search

This study investigated the possibility of fingerprinting different organic wastes (cow, pig and horse manure) and the vermicomposts produced by different earthworm species (Eisenia andrei, Eudrilus eugeniae and Lumbricus rubellus) analyzing the profiles of fatty acid methyl esters (FAMEs). We found clear differences between their microbial communities, demonstrating the power and sensitivity of the total FAME analysis. In addition, qualitative

Marta Lores; María Gómez-Brandón; Domingo Pérez-Díaz; Jorge Domínguez

2006-01-01

71

Influences of Three Plant Species on Fertility of Iron Mine Tailings Contained Vermicompost: Experiment in Greenhouse  

Microsoft Academic Search

The aim of this experiment is to test three plant species potential of growing in poor fertility and improving rhizosphere nutrient during iron mine tailings restoration. Three herbs, Zea diploperennis, Avena fatua and Lolium perenne, were cultured in pots with iron mine tailings under greenhouse. At the same time, cow manure vermicompost was applied into iron mine tailings to increase

Jun-ying Zhang; Yong-li Xu; Fu-ping Li; Dong-yun Han; Hui-jie Zheng

2011-01-01

72

Interactions between E Eiisseenniiaa a annddrreeii (Oligochaeta) and nematode populations during vermicomposting  

Microsoft Academic Search

Summary We studied the effect of the earthworm, Eisenia andrei, on the nematode community and on the microbial activity during the vermicomposting of two organic wastes, cow manure and sewage sludge. Fresh cow manure and sewage sludge was placed in five replicated boxes with and without earthworms for a period of 16 weeks. Samples were collected periodically and nematodes were

Jorge Domínguez; Robert W. Parmelee; Clive A. Edwards

2003-01-01

73

Feasibility of vermicomposting dairy biosolids using a modified system to avoid earthworm mortality  

Microsoft Academic Search

A laboratory study was conducted to examine the feasibility of vermicomposting dairy biosolids (dairy sludge), either alone or with either of the bulking agents ? cereal straw or wood shavings, using the epigeic earthworm ? Eisinea andrei. Earthworms added directly to these three substrates died within 48 hours. A system was developed to overcome the toxic effect of unprocessed dairy

R. Nogales; C. Elvira; E. Benítez; R. Thompson; M. Gomez

1999-01-01

74

Effects of humic acids from vermicomposts on plant growth  

Microsoft Academic Search

The interactions between earthworms and microorganisms can produce significant quantities of plant growth hormones and humic acids which act as plant regulators. Experiments were designed to evaluate the effects of humic acids extracted from vermicompost and compare them with the action of commercial humic acid in combination with a commercial plant growth hormone, indole acetic acid (IAA) which is a

Norman Q. Arancon; Clive. A. Edwards; Stephen Lee; Robert Byrne

2006-01-01

75

Effects of vermicomposts on growth and marketable fruits of field-grown tomatoes, peppers and strawberries  

Microsoft Academic Search

Summary Vermicomposts, produced commercially from cattle manure, market food waste and recycled paper waste, were applied to small replicated field plots planted with tomatoes (Lycopersicon esculentum) and bell peppers (Capsicum anuum grossum) at rates of 10 t ha-1 or 20 t ha-1 in 1999 and at rates of 5 t ha-1 or 10 t ha-1 in 2000. Food waste and

Norman Q. Arancon; Clive A. Edwards; Peter Bierman; James D. Metzger; Stephen Lee; Christie Welch

2003-01-01

76

Competitive exclusion of Salmonella typhimurium in broilers fed with vermicompost and complex carbohydrates  

Microsoft Academic Search

Vermicompost (VC) was produced by earthworms fed with fresh chicken faeces, and was earth?like in appearance and odour. In three experiments, VC was sprinkled on the first feed of newly?hatched broiler chicks. Treated and control groups were challenged on day 6 by the addition of seeder chicks that had been inoculated orally with Salmonella typhimurium. Chickens were killed at intervals

J. L. Spencer; J. R. Chambers; H. W. Modler

1998-01-01

77

Vermicomposting of industrially produced woodchips and sewage sludge utilizing Eisenia fetida  

Microsoft Academic Search

Adult Eisenia fetida were used to vermicompost woodchips (WC) and sewage sludge (SS) that are produced as waste product by platinum mines. The aims of the study were to examine the growth and reproductive success of the worms over 84 days to determine long-term feasibility of large-scale implementation and monitor the bioconcentration of heavy metals and the effects of microorganisms

M. S. Maboeta; L. van Rensburg

2003-01-01

78

Effects of C-to-N ratio on vermicomposting of biosolids  

Microsoft Academic Search

The role of organic carbon and inorganic nitrogen for cell synthesis, growth, and metabolism is important in all living organisms. To provide proper nutrition for earthworms during vermicomposting, carbon and nitrogen must be present in the substrates at the correct ratio. The usual practice is to arbitrarily add either a rich nitrogenous material, or a rich carbonaceous material to the

Pius M. Ndegwa; S. A. Thompson

2000-01-01

79

Composting of a crop residue through treatment with microorganisms and subsequent vermicomposting  

Microsoft Academic Search

Preliminary studies were conducted on wheat straw to test the technical viability of an integrated system of composting, with bioinoculants and subsequent vermicomposting, to overcome the problem of lignocellulosic waste degradation, especially during the winter season. Wheat straw was pre-decomposed for 40 days by inoculating it with Pleurotus sajor-caju, Trichoderma harzianum, Aspergillus niger and Azotobacter chroococcum in different combinations. This

Anshu Singh; Satyawati Sharma

2002-01-01

80

Potential of Eisenia foetida for Sustainable and Efficient Vermicomposting of Fly Ash  

Microsoft Academic Search

Vermicomposting of fly ash has been attempted, using red earthworm, Eisenia foetida. Fly ash, which was obtained from thermal power station, was mixed with cowdung in different proportions (20, 40, 60 and 80%). These mixtures were used as feed for earthworms, and after 30 days, vermicast recovery, worm zoomass and numbers of juveniles produced were recorded. A total of six

S. K. Gupta; Anamika Tewari; Richa Srivastava; R. C. Murthy; Saurabh Chandra

2005-01-01

81

Comparison of the effectiveness of composting and vermicomposting for the biological stabilization of cattle manure  

Microsoft Academic Search

Cattle manure is produced in large quantities in industrial breeding facilities and the storage and\\/or spreading of this waste on land may cause contamination of the atmosphere, soil and water. The aim of the present study was to evaluate the effectiveness of the active phases of composting, vermicompo- sting, and also a combination of composting and vermicomposting for reducing the

Cristina Lazcano; María Gómez-Brandón; Jorge Domínguez

2008-01-01

82

Vermicomposting of cattle and goat manures by Eisenia foetida and their growth and reproduction performance  

Microsoft Academic Search

Vermicomposting is commonly adopted for the treatment of livestock organic wastes. In the present study, two types of livestock manure were used for culturing of the earthworm, Eisenia foetida. Each treatment group consisted of six replicates and worm vermicasts were examined after 5 weeks. The concentrations of total C, P and K in goat manure vermicasts were higher than those

T. C. Loh; Y. C. Lee; J. B. Liang; D. Tan

2005-01-01

83

“In situ” vermicomposting of biological sludges and impacts on soil quality  

Microsoft Academic Search

A laboratory experiment was carried out to study soil quality amelioration through “in situ” vermicomposting of biological sludges. The experiment dealt with the stabilization, through the action of worms (Eisenia fetida), of five mixtures containing aerobic and anaerobic biological sludges spread on the soil surface. The results showed that by increasing the percentage of anaerobic sludge in the mixtures, the

G Masciandaro; B Ceccanti; C Garcia

2000-01-01

84

Production of Eisenia fetida and vermicompost from feed-lot cattle manure  

Microsoft Academic Search

Significant reductions in total mass of feedlot cattle manure were obtained by the intensive activity of earthworms. The process yielded two products: residual vermicompost, and an increase in earthworm biomass. Various modes of manure application were made to a prepared bedding (or support material), the most successful being a surface (vertical) application which resulted in a reduction of 30% of

Allan Mitchell

1997-01-01

85

Recycling of organic wastes for the production of vermicompost and its response in rice–legume cropping system and soil fertility  

Microsoft Academic Search

Investigations were made to recycle agricultural and agro-industrial wastes for the production of vermicompost using earthworms (Eudrilus eugeniae). Its response was studied in a rice–legume cropping system. Different combinations of coirpith\\/weeds and cowdung\\/sugarcane pressmud\\/biodigested slurry were tried for vermicomposting. The study showed that biodigested slurry and weeds was found to be an ideal combination for vermicomposting considering the nutrient content

A Jeyabal; G Kuppuswamy

2001-01-01

86

Impacts of Vermicompost and Nitrogen, Phosphorus, Potassium application on Soil Fertility Status in Arecanut Grown on a Laterite Soil  

Microsoft Academic Search

A field experiment (1998 to 2010) investigated the effects of vermicompost (VC) and chemical fertilizer (CF) application alone or in combination on soil fertility status in arecanut. Vermicompost significantly increased the soil pH (6.3) over CF and integrated treatments (5.7–5.8). Higher soil organic carbon was noticed with VC (2.85–3.00%) than CF (1.72–1.89%) and VC+CF (1.89–2.55%) in 2009. Soil test phosphorus

S. Sujatha; Ravi Bhat

2012-01-01

87

Organic matter humification by vermicomposting of cattle manure alone and mixed with two-phase olive pomace  

Microsoft Academic Search

The chemical changes occurring in a cattle manure (CM) and a mixture of two-phase olive pomace and CM (OP+CM) after vermicomposting with Eisenia andrei for eight months were evaluated. Further, humic acid (HA)-like fractions were isolated from the two substrates before and after the vermicomposting process, and analyzed for elemental and acidic functional group composition, and by ultraviolet\\/visible, Fourier transform

C. Plaza; R. Nogales; N. Senesi; E. Benitez; A. Polo

2008-01-01

88

Pig manure vermicompost as a component of a horticultural bedding plant medium: effects on physicochemical properties and plant growth.  

PubMed

This experiment was designed to characterize the physical, chemical and microbial properties of a standard commercial horticultural, greenhouse container, bedding plant medium (Metro-Mix 360), that had been substituted with a range of increasing concentrations (0%, 5%, 10%, 25%, 50% and 100% by volume) of pig manure vermicompost and to relate these properties to plant growth responses. The growth trials used tomatoes (Lycopersicon esculentum Mill.), grown in the substituted media for 31 days under glasshouse conditions, with seedling growth recorded in 20 pots for each treatment. Half of the tomato seedlings (10 pots per treatment) were watered daily with liquid inorganic fertilizer while the other half received water only. The percentage total porosity, percentage air space, pH and ammonium concentrations of the container medium all decreased significantly, after substitution of Metro-Mix 360 with equivalent amounts of pig manure vermicompost; whereas bulk density, container capacity, electrical conductivity, overall microbial activity and nitrate concentrations, all increased with increasing substitutions of vermicompost. The growth of tomato seedlings in the potting mixtures containing 100% pig manure vermicompost was reduced, possibly as a result of high soluble salt concentrations in the vermicompost and poorer porosity and aeration. The growth of tomato seedlings was greatest after substitution of Metro-Mix 360 with between 25% and 50% pig manure vermicompost, with more growth occurring in combinations of pig manure vermicompost treated regularly with a liquid fertilizer solution than in those with no fertilizer applied. Some of the growth enhancement in these mixtures seemed to be related to the combined effects of improved porosity, aeration and water retention in the medium and the high nitrate content of the substrate, which produced an increased uptake of nitrogen by the plant tissues, resulting in increased plant growth. When the tomato seedlings were watered daily with liquid inorganic fertilizer, substitution of Metro-Mix 360 with a very small amount (5%) of pig manure vermicompost resulted in a significant increase in the growth of tomato seedlings. Such effects could not be attributed solely to the nutritional or physical properties of the pig manure vermicompost. Therefore, it seems likely that the pig manure vermicompost provided other biological inputs, such as plant growth regulators into the container medium, that still need to be identified fully. PMID:11265782

Atiyeh, R M; Edwards, C A; Subler, S; Metzger, J D

2001-05-01

89

Changes in chemical and microbiological properties of rabbit manure in a continuous-feeding vermicomposting system.  

PubMed

In the present study the potential of the earthworm Eisenia fetida to process large amounts of waste was evaluated through continuous feeding reactors in which new layers of rabbit manure were added sequentially to form an age gradient inside the reactors. An optimal moisture level, ranging from 66% to 76%, was maintained throughout the process using an automatic watering system. The pH was close to 8.3, but decreased to 7.6 after 200 d of vermicomposting. No changes in electrical conductivity through the profile of layers were detected. Based on comparisons of phospholipid fatty acid (PLFA) profiles and microbial activity measurements (basal respiration), a decrease in the levels of bacteria and fungi in layers corresponding to vermicomposting times of more than 200 d occurred. This points to a higher degree of stabilisation in the final product, which is of utmost importance for its safe use as an organic amendment. PMID:23196253

Gómez-Brandón, María; Lores, Marta; Domínguez, Jorge

2013-01-01

90

Composting of sugar-cane waste by-products through treatment with microorganisms and subsequent vermicomposting.  

PubMed

The waste by-products of the sugar-cane industry, bagasse (b), pressmud (p) and trash (t) have been subjected to bioinoculation followed by vermicomposting to shorten stabilization time and improve product quality. Press-mud alone and in combination with other by-products of sugar processing industries was pre-decomposed for 30 days by inoculation with combination of Pleurotus sajorcaju, Trichoderma viridae, Aspergillus niger and Pseudomonas striatum. This treatment was followed by vermicomposting for 40 days with the native earthworm, Drawida willsi. The combination of both treatments reduced the overall time required for composting to 20 days and accelerated the degradation process of waste by-products of sugar processing industry, thereby producing a nutrient-enriched compost product useful for sustaining high crop yield, minimizing soil depletion and value added disposal of waste materials. PMID:20403689

Kumar, Rahul; Verma, Deepshikha; Singh, Bhanu L; Kumar, Umesh; Shweta

2010-09-01

91

Composting versus vermicomposting: a comparative study of organic matter evolution through straight and combined processes.  

PubMed

Changes in physical and chemical characteristics of an organic waste (tomato crop waste) throughout composting (COM), vermicomposting (VER) and the combination of both processes (C+V) were assessed at five selected stages. COM consisted of a combination of the static Rutgers system with forced aeration and pile turning. For VER Eisenia worms were fed with the raw material. For C+V pre-composted material was added to the worms. Particle size decreased during COM, yet it increased during VER and C+V due to the amalgamation of small particles. pH was alkaline throughout the processes. Heavy irrigation during vermicomposting resulted in greater decrease of EC and greater leaching of organic matter, total nitrogen and most macronutrients in VER and C+V than in COM. Final materials were not phytotoxic but compost could have salinity related problems. Thus, COM, VER and C+V produced treated organic material, which could be suitable for horticultural purposes. PMID:22705537

Fornes, Fernando; Mendoza-Hernández, Daicy; García-de-la-Fuente, Rosana; Abad, Manuel; Belda, Rosa M

2012-08-01

92

Sustainable reuse of rice residues as feedstocks in vermicomposting for organic fertilizer production.  

PubMed

Over the past decade, rice (Oryza sativa or Oryza glaberrima) cultivation has increased in many rice-growing countries due to the increasing export demand and population growth and led to a copious amount of rice residues, consisting mainly of rice straw (RS) and rice husk (RH), being generated during and after harvesting. In this study, Eudrilus eugeniae was used to decompose rice residues alone and rice residues amended with cow dung (CD) for bio-transformation of wastes into organic fertilizer. Generally, the final vermicomposts showed increases in macronutrients, namely, calcium (11.4-34.2%), magnesium (1.3-40.8%), phosphorus (1.2-57.3%), and potassium (1.1-345.6%) and a decrease in C/N ratio (26.8-80.0%) as well as increases in heavy metal content for iron (17-108%), copper (14-120%), and manganese (6-60%) after 60 days of vermicomposting. RS as a feedstock was observed to support healthier growth and reproduction of earthworms as compared to RH, with maximum adult worm biomass of 0.66 g/worm (RS) at 60 days, 31 cocoons (1RS:2CD), and 23 hatchlings (1RS:1CD). Vermicomposting of RS yielded better results than RH among all of the treatments investigated. RS that was mixed with two parts of CD (1RS:2CD) showed the best combination of nutrient results as well as the growth of E. eugeniae. In conclusion, vermicomposting could be used as a green technology to bio-convert rice residues into nutrient-rich organic fertilizers if the residues are mixed with CD in the appropriate ratio. PMID:23900949

Shak, Katrina Pui Yee; Wu, Ta Yeong; Lim, Su Lin; Lee, Chieh Ai

2014-01-01

93

Effect of Temperature Variations on Vermicomposting of Household Solid Waste and Fecundity of Eisenia fetida  

Microsoft Academic Search

Experiments were conducted in winter (October to January) and summer (May to August) seasons to study the effect of seasonal temperature variations on the vermicomposting of household waste using Eisenia fetida earthworms. The prevailing temperatures during experiments were in the range of ?2.7°C to 35.0°C during winter season and 18.0°C to 44.4°C during summer season. Organic matter degradation was higher

V. K. Garg; Renuka Gupta

2011-01-01

94

The Use of Vermicompost Products to Control Plant Diseases and Pests  

Microsoft Academic Search

\\u000a Improper waste management practices such as burning and land filling of wastes and intensive use of agrochemicals in conventional\\u000a cropping systems caused many environmental problems worldwide that forced nations to develop sustainable solutions. In 1970s,\\u000a vermiculture has emerged as a new industry, providing a wide variety of methods applicable at variable scales based on the\\u000a aimed products. Since then, vermicomposting

Yurdagul Simsek-Ersahin

95

Waste recycling: Utilization of coffee grounds and kitchen waste in vermicomposting  

Microsoft Academic Search

Vermicomposting using Lumbricus rubellus for 49 days was conducted after 21 days of pre-composting. Three different combination of treatments were prepared with eight replicates for each treatment namely cow dung: kitchen waste in 30:70 ratio (T1), cow dung: coffee grounds in 30:70 ratio (T2), and cow dung: kitchen waste: coffee grounds in 30:35:35 ratio (T3). The multiplication of earthworms in

A. J. Adi; Z. M. Noor

2009-01-01

96

Emissions of ammonia and greenhouse gases during combined pre-composting and vermicomposting of duck manure.  

PubMed

Combined pre-composting and vermicomposting has shown potential for reclamation of solid wastes, which is a significant source of ammonia (NH3), and greenhouse gases (GHG), including nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2). Earthworms and amendments may both affect physico-chemical characteristics that control gas-producing processes, and thus affect NH3 and GHG emissions. Here, we used two-way ANOVA to test the effects of addition of reed straw and combined addition of reed straw and zeolite on NH3 and GHG emissions during pre-composting of duck manure, either with or without a follow-up phase of vermicomposting. Results showed that cumulative N2O, CH4, and CO2 emissions during pre-composting and vermicomposting ranged from 92.8, 5.8, and 260.6mgkg(-)(1) DM to 274.2, 30.4, and 314.0mgkg(-1) DM, respectively. Earthworms and amendments significantly decreased N2O and CH4 emissions. Emission of CO2 was not affected by earthworms, but increased in responses to addition of reed straw. Cumulative NH3 emission ranged from 3.0 to 8.1gkg(-1) DM, and was significantly decreased by reed straw and zeolite addition. In conclusion, combined pre-composting and vermicomposting with reed straw and zeolite addition would be strongly recommended in mitigating emissions of N2O, CH4, and NH3 from duck manure. Moreover, this method also provides nutrient-rich products that can be used as a fertilizer. PMID:24835490

Wang, Jinzhi; Hu, Zhengyi; Xu, Xingkai; Jiang, Xia; Zheng, Binghui; Liu, Xiaoning; Pan, Xubin; Kardol, Paul

2014-08-01

97

Effects of vermicomposts produced from food waste on the growth and yields of greenhouse peppers  

Microsoft Academic Search

Vermicomposts, produced commercially from food wastes, were substituted at a range of different concentrations into a soil-less commercial bedding plant container medium, Metro-Mix 360 (MM360), to evaluate their effects on the growth and yields of peppers in the greenhouse. Six-week-old peppers (Capsicum annum L. var. California) were transplanted into 100%, 80%, 60%, 40%, 20% or 10% MM360 substituted with 0%,

Norman Q. Arancon; Clive A. Edwards; Rola Atiyeh; James D. Metzger

2004-01-01

98

Use of vermicompost extract as an aluminium inhibitor in aqueous solutions  

Microsoft Academic Search

Vermicompost extract (VCE) demonstrated the ability to raise the measured pH level of an acid soil thus showing a potential to limit aluminium toxicity. The relatively high proportion of humic substances (60% of VCE solid matter) suggested the possibility of formation of stable chelates with aluminium ions. A rate?based colorimetric method was utilised measuring at 585 nm the aluminium?pyrocatechol violet

D. Alter; A. Mitchell

1992-01-01

99

Solvent tolerance acquired by Brevibacillus brevis during an olive-waste vermicomposting process.  

PubMed

In this work, a cultivable, Gram-positive, solvent-resistant bacterium was isolated from vermicomposted olive wastes (VOW). The highest 16S rRNA sequence similarity (99%) was found in Brevibacillus brevis. The genome of the isolate, selected for trichloroethylene (TCE)-tolerance, contained a nucleotide sequence encoding a conserved protein domain (ACR_tran) ascribable to the HAE1-RND family. Members of this family are hydrophobic/amphiphilic efflux pumps largely restricted to Gram-negative bacteria. No DNA sequences of HAE1 transporters were detected in the genome of a reference B. brevis strain isolated from natural soil. Since no cultivable solvent-tolerant bacterium was detected in the unvermicomposted olive waste, a transfer of solvent-resistance genes from Gram-negative bacteria during the vermicomposting process could explain the presence of HAE1 transporters in B. brevis isolated from the vermicompost. Under TCE stress conditions, the acquired nucleotide sequence could be translated into proteins, and the tolerance to solvents is conferred to the bacterium. The isolate was designated as strain BEA1 (EF079071). PMID:19665790

Moreno, Beatriz; Vivas, Astrid; Nogales, Rogelio; Benitez, Emilio

2009-11-01

100

Critical tests for determination of microbiological quality and biological activity in commercial vermicompost samples of different origins.  

PubMed

The aim of the present paper was to show that differences in biological activity among commercially produced vermicompost samples can be found by using a relatively simple test system consisting of microorganism tests on six microbiological media and soilless seedling growth tests with four vegetable crop species. Significant differences in biological properties among analyzed samples were evident both at the level of microbial load as well as plant growth-affecting activity. These differences were mostly manufacturer- and feedstock-associated, but also resulted from storage conditions of vermicompost samples. A mature vermicompost sample that was produced from sewage sludge still contained considerable number of Escherichia coli. Samples from all producers contained several potentially pathogenic fungal species such as Aspergillus fumigatus, Pseudallescheria boidii, Pseudallescheria fimeti, Pseudallescheria minutispora, Scedosporium apiospermum, Scedosporium prolificans, Scopulariopsis brevicaulis, Stachybotrys chartarum, Geotrichum spp., Aphanoascus terreus, and Doratomyces columnaris. In addition, samples from all producers contained plant growth-promoting fungi from the genera Trichoderma and Mortierella. The described system can be useful both for functional studies aiming at understanding of factors affecting quality characteristics of vermicompost preparations and for routine testing of microbiological quality and biological activity of organic waste-derived composts and vermicomposts. PMID:23504062

Grantina-Ievina, Lelde; Andersone, Una; Berkolde-P?re, Dace; Nikolajeva, Vizma; Ievinsh, Gederts

2013-12-01

101

Prospects of using Metarhizium anisopliae to check the breeding of insect pest, Oryctes rhinoceros L. in coconut leaf vermicomposting sites.  

PubMed

During vermicomposting of coconut leaves by the earthworm Eudrilus sp., Oryctes rhinoceros L. (rhinoceros beetle), an insect pest of palms, was found to breed in the decomposing organic material. Metarhizium anisopliae var. major was tried as a biocontrol agent for management of this pest. The effect of pathogen at spore loads of 10(3), 10(4) and 10(5) per 10 g of substrate was tested in laboratory on Eudrilus sp. kept with O. rhinoceros grubs and on Eudrilus sp. alone for the pathogenic capability of the fungus on the pest and its possible toxicity towards the vermin. The efficacy of the entomopathogen was also tested in the field in vermicomposting tanks. In laboratory bioassay, 100% mycosis of O. rhinoceros grubs could be obtained while the entomopathogen had no toxic effect on the earthworms. There was a positive change in the number and weight of the earthworms on treatment with M. anisopliae. In the field, application of M. anisopliae reduced O. rhinoceros grubs in the vermicomposting tanks upto an extent of 72%. In conclusion, M. anisopliae could effectively control O. rhinoceros in vermicomposting sites and was non-hazardous to the vermicomposting process as well as the Eudrilus sp. PMID:16230009

Gopal, Murali; Gupta, Alka; Thomas, George V

2006-10-01

102

Influence of cow manure vermicompost on the growth, metabolite contents, and antioxidant activities of Chinese cabbage ( Brassica campestris ssp. chinensis )  

Microsoft Academic Search

The effects of cow manure vermicompost on plant growth, metabolite contents, and antioxidant activities of Chinese cabbage\\u000a were investigated in pot cultures. Five treatments were designed by mixing vermicompost and soil at ratio of 0:7, 1:7, 2:7,\\u000a 4:7, 7:0 (w\\/w). Marketable weight of Chinese cabbage was significantly (p?

Donghong Wang; Qinghua Shi; Xiufeng Wang; Min Wei; Jinyu Hu; Jun Liu; Fengjuan Yang

2010-01-01

103

Management of fresh water weeds (macrophytes) by vermicomposting using Eisenia fetida.  

PubMed

In the present study, potential of Eisenia fetida to recycle the different types of fresh water weeds (macrophytes) used as substrate in different reactors (Azolla pinnata reactor, Trapa natans reactor, Ceratophyllum demersum reactor, free-floating macrophytes mixture reactor, and submerged macrophytes mixture reactor) during 2 months experiment is investigated. E. fetida showed significant variation in number and weight among the reactors and during the different fortnights (P <0.05) with maximum in A. pinnata reactor (number 343.3?±?10.23 %; weight 98.62?±?4.23 % ) and minimum in submerged macrophytes mixture reactor (number 105?±?5.77 %; weight 41.07?±?3.97 % ). ANOVA showed significant variation in cocoon production (F4?=?15.67, P <0.05) and mean body weight (F4?=?13.49, P <0.05) among different reactors whereas growth rate (F3?=?23.62, P <0.05) and relative growth rate (F3?=?4.91, P <0.05) exhibited significant variation during different fortnights. Reactors showed significant variation (P <0.05) in pH, Electrical conductivity (EC), Organic carbon (OC), Organic nitrogen (ON), and C/N ratio during different fortnights with increase in pH, EC, N, and K whereas decrease in OC and C/N ratio. Hierarchical cluster analysis grouped five substrates (weeds) into three clusters-poor vermicompost substrates, moderate vermicompost substrate, and excellent vermicompost substrate. Two principal components (PCs) have been identified by factor analysis with a cumulative variance of 90.43 %. PC1 accounts for 47.17 % of the total variance represents "reproduction factor" and PC2 explaining 43.26 % variance representing "growth factor." Thus, the nature of macrophyte affects the growth and reproduction pattern of E. fetida among the different reactors, further the addition of A. pinnata in other macrophytes reactors can improve their recycling by E. fetida. PMID:23589265

Najar, Ishtiyaq Ahmed; Khan, Anisa B

2013-09-01

104

Prospects of using Metarhizium anisopliae to check the breeding of insect pest, Oryctes rhinoceros L. in coconut leaf vermicomposting sites  

Microsoft Academic Search

During vermicomposting of coconut leaves by the earthworm Eudrilus sp., Oryctes rhinoceros L. (rhinoceros beetle), an insect pest of palms, was found to breed in the decomposing organic material. Metarhizium anisopliae var. major was tried as a biocontrol agent for management of this pest. The effect of pathogen at spore loads of 103, 104 and 105 per 10g of substrate

Murali Gopal; Alka Gupta; George V. Thomas

2006-01-01

105

Pig manure vermicompost as a component of a horticultural bedding plant medium: effects on physicochemical properties and plant growth  

Microsoft Academic Search

This experiment was designed to characterize the physical, chemical and microbial properties of a standard commercial horticultural, greenhouse container, bedding plant medium (Metro-Mix 360), that had been substituted with a range of increasing concentrations (0%, 5%, 10%, 25%, 50% and 100% by volume) of pig manure vermicompost and to relate these properties to plant growth responses. The growth trials used

R. M. Atiyeh; C. A. Edwards; S. Subler; J. D. Metzger

2001-01-01

106

Dynamics of biological and chemical parameters during vermicomposting of solid textile mill sludge mixed with cow dung and agricultural residues  

Microsoft Academic Search

In India, thousands of tons of textile mill sludge are produced every year. We studied the ability of epigeic earthworm Eisenia foetida to transform textile mill sludge mixed with cow dung and\\/or agricultural residues into value added product, i.e., vermicompost. The growth, maturation, mortality, cocoon production, hatching success and the number of hatchlings were monitored in a range of different

Priya Kaushik; V. K. Garg

2004-01-01

107

Vermicomposting of coffee pulp using the earthworm Eisenia fetida: Effects on C and N contents and the availability of nutrients  

Microsoft Academic Search

In Colombia, more than 1 million tons of coffee pulp are produced every year. Its transformation into compost by means of turned piles has led to a final product with poor physical and chemical characteristics and vermicomposting has been suggested as an alternative method of transforming these wastes into a useful organic fertilizer. The ability of the earthworm Eisenia fetidato

F. H. Orozco; J. Cegarra; L. M. Trujillo; A. Roig

1996-01-01

108

Vermicomposting of vegetable-market solid waste using Eisenia fetida: Impact of bulking material on earthworm growth and decomposition rate  

Microsoft Academic Search

Vegetable-market solid waste is produced in millions of tones in urban areas and creates a problem of safe disposal. The aim of this study was to convert vegetable solid waste (VW) amended with wheat straw (WS), cow dung (CD), and biogas slurry (BGS) into vermicompost using earthworm Eisenia fetida. VW was mixed in bulky materials (WS, CD, and BGS) in

Surindra Suthar

2009-01-01

109

Vermicomposting of paper mill solid waste using epigeic earthworm Eudrilus eugeniae.  

PubMed

A 90 day study was conducted to evaluate the efficiency of an exotic earthworm species (Eudrilus eugeniae) for decomposition of different types of organic substrates (mixed liquor suspended solids, cow dung and leaf litter) into valuable vermicompost. Mixed liquor suspended solids (MLSS) and leaf litter (LL) were mixed with cow dung (CD) in eight different ratios with three replicates for each treatment. All vermibeds expressed a significant decrease in pH, organic carbon, C:N ratio and an increase in total nitrogen, phosphorus and potash. Overall, earthworms could maximize decomposition and mineralization efficiency in bedding with lower proportions of MLSS. Maximum value for earth worm zoo mass and higher concentration of nutrient content was observed in CD + MLSS + LL in 1:1:2 ratios. Earthworm mortality tended to increase with increasing proportion of MLSS and maximum mortality in E. eugeniae was recorded for MLSS treatment alone. Results indicate that vermicomposting might be useful for managing the energy and nutrient of MLSS on a low-input basis. Products of this process can be used for sustainable land restoration practices. PMID:25004743

Ponmani, S; Udayasoorian, C; Jayabalakrishnan, R M; Kumar, K Vinoth

2014-07-01

110

The influence of earthworms on nutrient dynamics during the process of vermicomposting.  

PubMed

In the present study the potential of the earthworm Eisenia andrei to modify chemical and microbiological properties, with a special focus on the nutrient content of fresh organic matter, was evaluated during 16 weeks of vermicomposting of cattle manure and sewage sludge. Samples were periodically collected in order to determine the changes in inorganic nitrogen (N), in total microbial biomass and activity, as well as in the total and available content of macro- and micronutrients. An optimal moisture level, ranging from 75% to 88%, was maintained throughout the process. The content of organic matter decreased over time, but no changes were found in this parameter as a result of earthworm activity. The carbon/N ratio rapidly decreased, but only in the manure, reflecting rapid decomposition and mineralisation of the organic matter by the earthworms. An increase in N mineralisation was also attributable to the presence of earthworms, although in the manure this effect was hardly detectable before the eighth week of vermicomposting. Earthworm activity also enhanced the total content of potassium, calcium and iron together with an increase in the availability of phosphorus and zinc. We did not detect a significant earthworm effect on microbial respiration, but their activity increased greatly microbial biomass nitrogen in sewage sludge. PMID:23831778

Domínguez, Jorge; Gómez-Brandón, María

2013-08-01

111

Efficacy of vermicomposting for recycling organic portion of hospital wastes using Eisenia fetida : standardization of cow manure proportion to increase enzymatic activities and fungal biomass  

Microsoft Academic Search

Hospital wastes are infectious wastes generated in hospitals and need to be disposed in such a way that they do not spread\\u000a disease. In this experiment, 5, 10, 15 and 20% cow manure (CM) were mixed with hospital wastes (HW), and mixed wastes were\\u000a subjected to vermicomposting. In control treatment, only HW was used for vermicomposting. Results suggested that significantly

Prabhat PramanikYoung; Young Ryun Chung

2010-01-01

112

[Organic waste treatment by earthworm vermicomposting and larvae bioconversion: review and perspective].  

PubMed

There is a growing attention on the environmental pollution and loss of potential regeneration of resources due to the poor handling of organic wastes, while earthworm vermicomposting and larvae bioconversion are well-known as two promising biotechnologies for sustainable wastes treatments, where earthworms or housefly larvae are employed to convert the organic wastes into humus like material, together with value-added worm product. Taken earthworm ( Eisenia foetida) and housefly larvae ( Musca domestica) as model species, this work illustrates fundamental definition and principle, operational process, technical mechanism, main factors, and bio-chemical features of organisms of these two technologies. Integrated with the physical and biochemical mechanisms, processes of biomass conversion, intestinal digestion, enzyme degradation and microflora decomposition are comprehensively reviewed on waste treatments with purposes of waste reduction, value-addition, and stabilization. PMID:23914515

Zhang, Zhi-jian; Liu, Meng; Zhu, Jun

2013-05-01

113

Changes in microbial community structure and function during vermicomposting of pig slurry.  

PubMed

Most studies investigating the effects of earthworms on microorganisms have focused on the changes before and after vermicomposting rather than those that occur throughout the process. In the present study, we designed continuous feeding reactors in which new layers of pig slurry (1.5 and 3 kg) were added sequentially to form an age gradient inside the reactors in order to evaluate the impact of the earthworm species Eisenia fetida on microbial community structure and function. The activity of earthworms greatly reduced the bacterial and fungal biomass and microbial diversity relative to the control values. However, the pronounced presence of earthworms in the younger layers stimulated microbial activity and as such increased carbon mineralization probably due to the fact that the microorganisms may have been less resource-limited as a result of earthworm activity, as indicated by the ratio of monounsaturated to saturated PLFAs. PMID:21220200

Gómez-Brandón, María; Aira, Manuel; Lores, Marta; Domínguez, Jorge

2011-03-01

114

[Comparative studies on vermicomposting of sewage sludge with two epigeic earthworms].  

PubMed

A comparative study was conducted two epigeic species earthworms (Bimastus parvus and Eisenia foetida) for the evaluation of their efficacy in vermicomposting of sewage sludge. The various changes studied during pot experiments were the physiochemical properties of the sewage sludge, sludge reduction and earthworm biomass. Vermicomposting resulted that both epigeic species earthworms showed same capability among sewage sludge mineralization and decomposition rate and reduction. By the end of experiment, the pH value declined to 6.27 with B. parvus and 7.07 with E. foetida, but both epigeic species earthworms showed same mineralization and decomposition rate. B. parvus produced 31.96%, 5.76% and 17.91% increases in nitrogen, phosphorus, and potassium as well as 44.14% and 30.69% decreases in C/N and C/P ratios as compared to initial after 30 days of inoculation. In contrast, E. foetida produced 35.48% and 11.58% increases in nitrogen and potassium as well as 10.12%, 46.73% and 20.50% decreases in phosphorus, C/N and C/P ratios as compared to initial after 30 days of earthworm activity. At the same time, both epigeic species earthworms resulted in significant reduction in heavy metal content. The reduction in heavy metal content for B. parvus and E. foetida was found in the order: Zn > Cu > Pb > Cr and Cu > Zn > Ph > Cr. At the end of experiment, the weight and cocoons of B. parvus and E. foetida showed significant increase, which the growth rate and the reproductive rate were 76%-86% and 156%-131% respectively. PMID:20623864

Chen, Xue-min; Huang, Kui; Fu, Xiao-yong; Ni, Shao-ren

2010-05-01

115

Amplification of Plant Beneficial Microbial Communities During Conversion of Coconut Leaf Substrate to Vermicompost by Eudrilus sp  

Microsoft Academic Search

The population densities of 15 microbial communities in the coconut leaves + cow manure mixture (10:1 ratio, w\\/w) and pure\\u000a cow manure, gut contents of the earthworm, Eudrilus sp., reared on the above substrates and vermicompost produced by the worm were studied. The enumeration was done by dilution\\u000a plate and most probable number method using several selective and semi-selective microbial media. In

Murali Gopal; Alka Gupta; E. Sunil; George V. Thomas

2009-01-01

116

Vermicomposting of sludges from paper mill and dairy industries with Eisenia andrei: A pilot-scale study  

Microsoft Academic Search

We studied vermicomposting with Eisenia andrei of sludges from a paper mill mixed with cattle manure in a six-month pilot-scale experiment. Initially, a small-scale laboratory experiment was carried out to determine the growth and reproduction rates of earthworms in the different substrates tested. In the pilot-scale experiment, the number of earthworms increased between 22- and 36-fold and total biomass increased

C. Elvira; L. Sampedro; E. Benítez; R. Nogales

1998-01-01

117

Kinetic parameters of dehydrogenase in the assessment of the response of soil to vermicompost and inorganic fertilisers  

Microsoft Academic Search

Kinetic parameters (V\\u000a max and K\\u000a m) of dehydrogenase activity were determined in order to assess the metabolic response of a soil about 1?year after organic\\u000a and mineral treatments. The soil was planted with maize (Zea mays) and treated with the following fertilisers: organic (vermicompost; VC), mineral (ammonium phosphate and urea), and an organo-mineral\\u000a mixture. V\\u000a max, which represents a

G. Masciandaro; B. Ceccanti; V. Ronchi; C. Bauer

2000-01-01

118

Stabilisation of sewage sludge and vinasse bio-wastes by vermicomposting with rabbit manure using Eisenia fetida.  

PubMed

Changes in the chemical characteristics and biological parameters of Eisenia fetida were assessed by VER using (CO+VE) rabbit manure (Vo) spiked with sewage sludge (SS) or vinasse (V). Seven mixtures were used: Vo, control; Vo+SS at 10%, 30%, and 50% (SS1, SS2, and SS3); Vo+V at 10%, 30%, and 50% (V1, V2, and V3). SS vermicomposts had higher humus, nutrient and total metal contents, but less soluble salts (EC) than V vermicomposts. The number and weight of worms were higher in Vo, followed by SS, at decreasing doses. V3 showed the smallest number and size. The EC of the initial mixtures explained reduced weight, whereas EC and avP2O5 accounted for lower numbers. Vermicomposting is an efficient biowaste recycling technology, but the total amount and composition of soluble salts in food influence the quality of end products and are of primary importance for biological parameters of worms. PMID:23584410

Molina, María José; Soriano, María Desamparados; Ingelmo, Florencio; Llinares, Josep

2013-06-01

119

Vermicomposting of herbal pharmaceutical industry waste: earthworm growth, plant-available nutrient and microbial quality of end materials.  

PubMed

Efforts were made to decompose herbal pharmaceutical industrial waste (HPIW) spiked with cow dung (CD) using Eisenia fetida. A total of five vermibeds: T(1) - HPIW (0%+CD 100%, control), T(2) - HPIW (25%), T(3) - HPIW (50%), T(4) - HPIW (75%) and T(5) - HPIW (100%) were used for vermicomposting. The changes in biology and chemistry of vermibeds were measured after ten days interval. E. fetida showed high growth and cocoon production rate in all vermibeds. The vermicomposted material contained great population of fungi 6.0-40.6 (CFU × 10(5)g(-1)), bacteria 220-1276.0 (CFU × 10(8)g(-1)) and actinomycetes 410.0-2962.0 (CFU × 10(5)g(-1)) than initial material. Vermicomposted material was rich in plant-available forms of nutrients (N-NO(3)(-),PO(4)(3-),available K and SO(4)(-2)). Results suggested that noxious industrial waste can be converted into valuable product for sustainable soil fertility programme. PMID:22440575

Singh, Deepika; Suthar, Surindra

2012-05-01

120

Effect of vermicomposting on calcium, sulphur and some heavy metal content of different biodegradable organic wastes under liming and microbial inoculation.  

PubMed

A study was conducted to evaluate the changes in total calcium and sulphur and some heavy metal (Zn, Cu, and Pb) concentration of different organic wastes affected by liming and microorganism inoculation. Vermicomposting was an effective technology for disposal of organic substrates like municipal solid wastes (MSW), possessing comparatively higher concentration of heavy metals. The addition of lime in initial organic substrates significantly (P ? 0.05) increased total calcium and total sulphur content of vermicomposts. Inoculation of microorganisms significantly (P ? 0.05) reduced the heavy metal content of final products as compared to control. Fungal strains were comparatively more effective in detoxification of heavy metals than B. polymyxa. PMID:22375592

Das, Debabrata; Bhattacharyya, Pradip; Ghosh, B C; Banik, Pabitra

2012-01-01

121

Solid waste management of temple floral offerings by vermicomposting using Eisenia fetida.  

PubMed

Recycling of temple waste (TW) mainly comprising of floral offerings was done through vermitechnology using Eisenia fetida and its impact on seed germination and plant growth parameters was studied by comparing with kitchen waste (KW) and farmyard waste (FYW) vermicompost (VC). The worm biomass was found to be maximum in TW VC compared to KW and FYW VCs at both 40 and 120days old VCs. Physico-chemical analysis of worm-worked substrates showed better results in TW VC especially in terms of electrical conductivity, C/N, C/P and TK. 10% TW VC-water extract (VCE) showed stimulatory effect on germination percentage of chickpea seeds while KW and FYW VCE proved effective at higher concentration. Variation in growth parameters was also observed with change in the VC-soil ratio and TW VC showed enhanced shoot length, root length, number of secondary roots and total biomass at 12.5% VC compared to KW and FYW VC. PMID:23481343

Singh, Akanksha; Jain, Akansha; Sarma, Birinchi K; Abhilash, P C; Singh, Harikesh B

2013-05-01

122

Substrate-induced respiration as a measure of microbial biomass in vermicomposting studies.  

PubMed

Here it is evaluated the relationship between substrate-induced respiration (SIR) and microbial biomass C (C(mic), estimated by chloroform fumigation-extraction) in order to establish SIR as a quick technique to determine microbial biomass in vermicomposting processes. For this, there were designed continuous feeding reactors in which new layers of manure were added sequentially to form an age gradient inside the reactors. Six reactors were set up with and without earthworms (three reactors per treatment). In reactors, with and without earthworms, values of C(mic) and SIR ranged from 1690 to 42,900 microg g(-1)dw and from 43 to 2300 microg CO(2) h(-1)g(-1)dw, respectively. SIR was significantly related to C(mic) (r=0.63, P<0.0001). It is proposed an equation to convert SIR values into C(mic), SIR (microg CO(2) h(-1)g(-1)dw)=25.97+0.04 C(mic) (microg g(-1)dw) which will be useful for comparison between studies which used different techniques for determining microbial biomass. PMID:20400302

Aira, Manuel; Domínguez, Jorge

2010-09-01

123

Vermicomposting of tannery sludge mixed with cattle dung into valuable manure using earthworm Eisenia fetida (Savigny).  

PubMed

The present study revealed the role of earthworm in converting tannery sludge into a valuable product. Tannery sludge was toxic to earthworm, therefore it was mixed with cattle dung in different proportions viz. 0:100 (T(0)), 10:90 (T(10)), 25:75 (T(25)), 50:50 (T(50)) and 75:25 (T(75)) on dry weight basis. The minimum mortality and highest population buildup of worms was in T(0) mixture. Nitrogen, sodium, phosphorus and pH increased from initial in the range of 7.3-66.6%, 16.90-70.58%, 8.57-44.8% and 2.8-13.65%, respectively. On the other hand potassium, organic carbon and electrical conductivity decreased in the range of 4.34-28.5%, 7.54-22.35% and 32.35-53.12%, respectively. C:N ratio decreased from 20.53% to 47.36% in the final products. Transition metals increased significantly from the initial value and within the permissible limit. The result indicated that vermicomposting with Eisenia fetida is better for changing this sludge into nutrient rich manure in a short period of time. PMID:21676611

Vig, Adarsh Pal; Singh, Jaswinder; Wani, Shahid Hussain; Singh Dhaliwal, Salwinder

2011-09-01

124

Emission of greenhouse gases from home aerobic composting, anaerobic digestion and vermicomposting of household wastes in Brisbane (Australia).  

PubMed

This study investigated greenhouse gas (GHG) emissions from three different home waste treatment methods in Brisbane, Australia. Gas samples were taken monthly from 34 backyard composting bins from January to April 2009. Averaged over the study period, the aerobic composting bins released lower amounts of CH(4) (2.2 mg m(- 2) h(-1)) than the anaerobic digestion bins (9.5 mg m(-2) h(-1)) and the vermicomposting bins (4.8 mg m(-2) h( -1)). The vermicomposting bins had lower N(2)O emission rates (1.2 mg m(-2) h(- 1)) than the others (1.5-1.6 mg m(-2) h( -1)). Total GHG emissions including both N(2)O and CH(4) were 463, 504 and 694 mg CO(2)-e m(- 2) h(-1) for vermicomposting, aerobic composting and anaerobic digestion, respectively, with N(2)O contributing >80% in the total budget. The GHG emissions varied substantially with time and were regulated by temperature, moisture content and the waste properties, indicating the potential to mitigate GHG emission through proper management of the composting systems. In comparison with other mainstream municipal waste management options including centralized composting and anaerobic digestion facilities, landfilling and incineration, home composting has the potential to reduce GHG emissions through both lower on-site emissions and the minimal need for transportation and processing. On account of the lower cost, the present results suggest that home composting provides an effective and feasible supplementary waste management method to a centralized facility in particular for cities with lower population density such as the Australian cities. PMID:20601402

Chan, Yiu C; Sinha, Rajiv K; Weijin Wang

2011-05-01

125

Direct and Residual Effect of Vermicompost, Biofertilizers and Phosphorus on Soil Nutrient Dynamics and Productivity of Chickpea-Fodder Maize Sequence  

Microsoft Academic Search

Field experiments were carried out at the Indian Agricultural Research Institute, New Delhi, India. The principal findings revealed that application of 3t vermicompost\\/ha to chickpea improved dry matter accumulation, grain yield and grain protein content in chickpea, soil N and P and bacterial count, dry fodder yield of succeeding maize, total N and P uptake by the cropping system over

R. S. Jat; I. P. S. Ahlawat

2006-01-01

126

Vermicomposting of toxic weed--Lantana camara biomass: chemical and microbial properties changes and assessment of toxicity of end product using seed bioassay.  

PubMed

This work illustrates the results of vermicomposting trials of noxious weed - Lantana camara (LL) leaf litter spiked with cow dung (CD) in different ratios (0%, 20%, 40%, 60% and 80%) using Eisenia fetida. A total of five treatments were established and changes in chemical and microbial properties of vermibeds have been observed for 60 days. In all treatments, a decrease in pH (19.5-30.7%), total organic carbon (TOC) (12-23%) and C:N ratio (25-35%), but increase in ash content (16-40%), total N(N(tot)) (11-32%), available phosphorous (P(avail)) (445-629%), exchangeable potassium (K(exch)) (63-156%) exchangeable calcium (Ca(exch)) (67-94%),and N-NO3(-) (164-499%) was recorded. Vermibeds with 40-60% LL (T2 and T3) showed better mineralization rate. The number of fungi, bacteria and actinomycetes showed 0.33-1.67-fold, 0.72-2.33-fold and 2.03-2.99-fold increase, respectively after vermicomposting process. The germination index (GI) was between 47% and 83% in all vermicomposts as indicated by seed bioassay test. Results thus suggested that Lantana may be a potential source for vermicompost production for sustainable agriculture. PMID:23796668

Suthar, Surindra; Sharma, Priyanka

2013-09-01

127

Vermicompost as a substitute for peat in potting media: Effects on germination, biomass allocation, yields and fruit quality of three tomato varieties  

Microsoft Academic Search

Commercial potting media often contain substantial amounts of peat that was mined from endangered bog and fen ecosystems. The main objectives of this study were to assess (1) whether the amendment of 0, 20, 40, 60, 80 and 100% (v\\/v) of vermicompost (VC) to a fertilized commercial peat potting substrate has effects on the emergence, growth and biomass allocation of

Johann G. Zaller

2007-01-01

128

Experimental co-digestion of corn stalk and vermicompost to improve biogas production  

SciTech Connect

Anaerobic co-digestion of corn stalk and vermicompost (VC) as well as mono-digestion of corn stalk were investigated. Batch mono-digestion experiments were performed at 35 {+-} 1 {sup o}C and initial total solid loading (TSL) ranged from 1.2% to 6.0%. Batch co-digestion experiments were performed at 35 {+-} 1 {sup o}C and initial TSL of 6% with VC proportions ranged from 20% to 80% of total solid (TS). For mono-digestion of corn stalk, a maximum methane yield of 217.60 {+-} 13.87 mL/g TS{sub added} was obtained at initial TSL of 4.8%, and acidification was found at initial TSL of 6.0% with the lowest pH value of 5.10 on day 4. Co-digestion improved the methane yields by 4.42-58.61% via enhancing volatile fatty acids (VFAs) concentration and pH value compared with mono-digestion of corn stalk. The maximum biogas yield of 410.30 {+-} 11.01 mL/g TS{sub added} and methane yield of 259.35 {+-} 13.85 mL/g TS{sub added} were obtained for 40% VC addition. Structure analysis by X-ray diffractometry (XRD) showed that the lowest crystallinity of 35.04 of digested corn stalk was obtained from co-digestion with 40% VC, which decreased 29.4% compared to 49.6 obtained from un-treated corn stalk. It is concluded that co-digestion with VC is beneficial for improving biodigestibility and methane yield from corn stalk.

Chen Guangyin [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093 (China); Zheng Zheng, E-mail: zzhenghj@fudan.edu.c [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093 (China); Department of Environmental Science and Engineering, Fudan University, Shanghai 200433 (China); Yang Shiguan [National Engineering Laboratory of Biomass Power Generation Equipment, School of Renewable Energy, North China Electric Power University, Beijing 102206 (China); Fang Caixia; Zou Xingxing; Luo Yan [State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093 (China)

2010-10-15

129

Vermicomposting of Tea Factory Coal Ash: Metal accumulation and metallothionein response in Eisenia fetida (Savigny) and Lampito mauritii (Kinberg).  

PubMed

Earthworms can accumulate heavy metals in their intestines to a great extent. Impact of feed materials and duration of metal exposure on natural activity of earthworms are rather unclear; this investigation therefore addresses the impact of metal rich Tea Factory Coal Ash (TFCA) on reproduction, composting and metal accumulation ability of Eisenia fetida and Lampito mauritii. Earthworm count and cocoon production increased significantly during vermicomposting. pH of the vermicomposted mixtures shifted toward neutrality, total organic C decreased substantially and total N enhanced significantly compared to composting. High heavy metal (Mn, Zn, Cu, As) accumulation was recorded in the intestine of both the earthworm species. Moreover, gradual increase in the metal-inducible metallothionein concentration indicated the causal mechanism of metal accumulation in these species. TFCA+cow dung (CD) (1:1) were most favorable feed mixture for E. fetida and TFCA+CD (1:2) were good for L. mauritii in regard to metal accumulation and compost quality. PMID:24907568

Goswami, L; Sarkar, S; Mukherjee, S; Das, S; Barman, S; Raul, P; Bhattacharyya, P; Mandal, N C; Bhattacharya, S; Bhattacharya, S S

2014-08-01

130

Effect of vermicomposts from wastes of the wine and alcohol industries in the persistence and distribution of imidacloprid and diuron on agricultural soils.  

PubMed

The persistence and distribution of diuron (D) and imidacloprid (I) in soils amended or not with winery vermicomposts were recorded for several months. Sandy loam (S1) and silty clay loam (S2) soils with organic carbon contents of <1% were selected. After incubation, around 78% of I remained in the soil and no metabolites were found. Diuron was dissipated more rapidly except in the unamended soil S1 with DT(50) values of 259 days. The addition of vermicomposts to S1 soil decreased the persistence of D, and high amounts of DPMU (40%) and DPU (20%) metabolites were found. In unamended and amended S2 soils, the persistence of D was lower than in S1 (DT(50) < 42 days) but only DPMU was determined (up to 5%). Different simulation models from FOCUS guidelines were applied to the experimental data. No relationship between pesticide degradation and soil enzyme activities was found. PMID:19530717

Fernández-Bayo, Jesús D; Nogales, Rogelio; Romero, Esperanza

2009-06-24

131

Towards sustainable production of peppermint (Mentha piperita L.) through integrated use of vermicompost and cowpea green manuring with synthetic nitrogen fertilization  

Microsoft Academic Search

A field experiment with peppermint (Mentha piperita L.) was conducted in a sandy loam (Typic ustifluvent) soil during 2007 and 2008 at Lucknow, India. Ten treatments consisting of control (no synthetic or organic nitrogen fertilization), synthetic nitrogen fertilization (SN) 75, 150 and 225 kg ha alone, vermicompost (VC) 3 t + 37.5 kg SN ha, VC 6 t + 75 kg SN ha and VC 9 t + 112.5 kg SN ha and

Muni Ram; Man Singh; A. K. Prajapati; Dasha Ram; Garima Rawat

2011-01-01

132

Towards sustainable production of peppermint (Mentha piperita L.) through integrated use of vermicompost and cowpea green manuring with synthetic nitrogen fertilization  

Microsoft Academic Search

A field experiment with peppermint (Mentha piperita L.) was conducted in a sandy loam (Typic ustifluvent) soil during 2007 and 2008 at Lucknow, India. Ten treatments consisting of control (no synthetic or organic nitrogen fertilization), synthetic nitrogen fertilization (SN) 75, 150 and 225 kg ha alone, vermicompost (VC) 3 t + 37.5 kg SN ha, VC 6 t + 75 kg SN ha and VC 9 t + 112.5 kg SN ha and

Muni Ram; Man Singh; A. K. Prajapati; Dasha Ram; Garima Rawat

2012-01-01

133

Assessing the impact of composting and vermicomposting on bacterial community size and structure, and microbial functional diversity of an olive-mill waste  

Microsoft Academic Search

The aim of this study was to couple biochemical and molecular methodologies for evaluating the impact of two recycling technologies (composting and vermicomposting) on a toxic organic waste. To do this, six enzyme activities controlling the key metabolic pathways of the breakdown of organic matter, real-time PCR assays targeting 16S rRNA genes, and denaturing gradient gel electrophoresis (DGGE) profiling-sequence analysis

A. Vivas; B. Moreno; S. Garcia-Rodriguez; E. Benitez

2009-01-01

134

CH{sub 4} and N{sub 2}O from mechanically turned windrow and vermicomposting systems following in-vessel pre-treatment  

SciTech Connect

Methane (CH{sub 4}) and nitrous oxide (N{sub 2}O) are included in the six greenhouse gases listed in the Kyoto protocol that require emission reduction. To meet reduced emission targets, governments need to first quantify their contribution to global warming. Composting has been identified as an important source of CH{sub 4} and N{sub 2}O. With increasing divergence of biodegradable waste from landfill into the composting sector, it is important to quantify emissions of CH{sub 4} and N{sub 2}O from all forms of composting and from all stages. This study focuses on the final phase of a two stage composting process and compares the generation and emission of CH{sub 4} and N{sub 2}O associated with two differing composting methods: mechanically turned windrow and vermicomposting. The first stage was in-vessel pre-treatment. Source-segregated household waste was first pre-composted for seven days using an in-vessel system. The second stage of composting involved forming half of the pre-composted material into a windrow and applying half to vermicomposting beds. The duration of this stage was 85 days and CH{sub 4} and N{sub 2}O emissions were monitored throughout for both systems. Waste samples were regularly subjected to respirometry analysis and both processes were found to be equally effective at stabilising the organic matter content. The mechanically turned windrow system was characterised by emissions of CH{sub 4} and to a much lesser extent N{sub 2}O. However, the vermicomposting system emitted significant fluxes of N{sub 2}O and only trace amounts of CH{sub 4}. In-vessel pre-treatment removed considerable amounts of available C and N prior to the second stage of composting. This had the effect of reducing emissions of CH{sub 4} and N{sub 2}O from the second stage compared to emissions from fresh waste found in other studies. The characteristics of each of the two composting processes are discussed in detail. Very different mechanisms for emission of CH{sub 4} and N{sub 2}O are proposed for each system. For the windrow system, development of anaerobic zones were thought to be responsible for CH{sub 4} release. High N{sub 2}O emission rates from vermicomposting were ascribed to strongly nitrifying conditions in the processing beds combined with the presence of de-nitrifying bacteria within the worm gut.

Hobson, A.M. [Department of Earth Sciences, Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom)]. E-mail: a.m.hobson@open.ac.uk; Frederickson, J. [Integrated Waste Systems, Faculty of Technology, Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom); Dise, N.B. [Department of Earth Sciences, Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom); Integrated Waste Systems, Faculty of Technology, Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom)

2005-07-01

135

Reduction of total coliform numbers during vermicomposting is caused by short-term direct effects of earthworms on microorganisms and depends on the dose of application of pig slurry  

Microsoft Academic Search

During vermicomposting of organic waste, the interactions between epigeic earthworms and the detrital microbial community lead to decreases in the abundance of some potentially pathogenic microorganisms. Despite its importance, little is known about the mechanisms involved and the factors that affect the intensity of this effect. In the present study, we carried out three experiments to test the effect of

Fernando Monroy; Manuel Aira; Jorge Domínguez

2009-01-01

136

Actividad antibacteriana de la Sangre de Grado (Croton lechleri) frente al Helicobacter pylori  

Microsoft Academic Search

SUMMARY Actually it is accepted the pathogenic role of Helicobacter pylori in the generation of gastritis and gastric ulcer, as well as the direct relation among the eradication of the bacteria and the absence of complications and subsequent recurrences. Considering the anti-ulcerogenic activity attributed to the \\

TAMARIZ ORTIZ; CAPCHA MENDOZA; PALOMINO CADENAS; AGUILAR OLANO

2003-01-01

137

Cómo hacer frente al cáncer: cuidados médicos de apoyo y cuidados paliativos  

Cancer.gov

Formas de controlar los efectos físicos y psicológicos del cáncer y del tratamiento en los pacientes y sus familias, así como los efectos en la calidad de vida. También se incluye información sobre servicios de salud, ayuda económica y seguro médico.

138

Vermicomposting toilets, an alternative to latrine style microbial composting toilets, prove far superior in mass reduction, pathogen destruction, compost quality, and operational cost.  

PubMed

Composting toilets aim to recycle excrement into safe, stable humus. Preceding this, low costs, low risks, and mass reduction should be ensured. Source separating vermicomposting toilets (SSVCs) outperformed mixed latrine microbial composting toilets (MLMCs) in all categories. MLMCs: incurred ten times greater operational costs; created 10x more operator exposure; employed no proven pathogen reduction mechanism since solid end-products averaged 71,000±230,000CFU/g (fecal-origin) Escherichia coli and 24±5% total solids, consistently failed NSF/ANSI Standard 41; failed to reduce volatile solids compared to raw fecal matter; increased total contaminated dry mass by 274%, and produced alkaline end-product (8.0±0.7) high in toxic free ammonia (Solvita® 2.6±1.5). SSVCs have low maintenance costs and risks; adequate worm density for pathogen destruction (0.03±0.04g-worm/g-material); reduced E. coli 200±244CFU/g in neutral (7.4±0.3), stable (60±10% volatile solids), and mature (4±0 Solvita® NH(3)) end-product. PMID:22658870

Hill, Geoffrey B; Baldwin, Susan A

2012-10-01

139

Changes in enzymatic activities and microbial properties in vermicompost of water hyacinth as affected by pre-composting and fungal inoculation: a comparative study of ergosterol and chitin for estimating fungal biomass.  

PubMed

In this experiment, three different fungal species, viz. Trichoderma viridae, Aspergillus niger and Phanerochaete chrysosporium, were inoculated in 7 day and 15 day partially decomposed water hyacinth to study their effect on enzymatic activities, microbial respiration and fungal biomass of the final stabilized product. The results suggested that increasing the duration of pre-composting from 7 days to 15 days did not show any significant effect on the activities of hydrolytic enzymes. Inoculation of fungi significantly (P < or = 0.05) increased cellulase, protease and acid and alkaline phosphatase activities. The highest value of ergosterol was recorded in A. niger-inoculated vermicomposts. Inoculation of P. chrysosporium in initial organic waste registered the highest chitin content in vermicompost. A comparison of fungal biomass and chitin content revealed a conversion factor of 2.628 with a standard deviation of 0.318. Due to significant correlation (r = 0.864), this conversion factor allows for the calculation of fungal biomass from chitin, which is comparatively more stable than ergosterol. PMID:20303251

Pramanik, P

2010-01-01

140

ALS - resources  

MedlinePLUS

Resources - ALS ... The following organizations are good resources for information on amyotrophic lateral sclerosis : Muscular Dystrophy Association - http://mda.org/disease/amyotrophic-lateral-sclerosis National Amyotrophic Lateral Sclerosis (ALS) ...

141

ALS Association  

MedlinePLUS

... Against Lou Gehrig’s Disease New Research Finds Protein Clearance is Key to Neuron Survival View all News ... difficulty getting around, traveling brings additional challenges. Read tips for travelling with ALS. OUR MISSION: Leading the ...

142

Al Composites  

NASA Astrophysics Data System (ADS)

In the present study, cold spraying technique was used to fabricate a metal matrix composite (MMC) that consists of Ni matrix and 20 vol.% Ni3Al particles at two different particle sizes as reinforcement. This study intends to investigate the effect of reinforcement particle size on microstructural and mechanical properties of cold sprayed MMCs. Two different Ni3Al powders with nominal particle size of -45 to +5 and +45 to 100 ?m were used as reinforcement in this study. Cold sprayed Ni-Ni3Al samples were subjected to the microstructural observation and characterization prior to any mechanical testing. Then, samples were tested using nano-indentation, Knoop hardness, Vickers hardness, and Resonance frequency to evaluate their mechanical properties. No significant changes were observed in microstructural characteristics due to different particle sizes. The results obtained from a variety of mechanical testings indicated that the increasing reinforcement particle size resulted in the slight reduction of mechanical properties such as elastic modulus and hardness in cold sprayed MMCs. The mechanical interlock between deposited particles defines the bonding strength in cold sprayed samples. Small size particles have a higher velocity and impact resulting in stronger interlock between deformed particles.

Chandanayaka, Tharaka; Azarmi, Fardad

2014-05-01

143

AL Amyloidosis  

PubMed Central

Definition of the disease AL amyloidosis results from extra-cellular deposition of fibril-forming monoclonal immunoglobulin (Ig) light chains (LC) (most commonly of lambda isotype) usually secreted by a small plasma cell clone. Most patients have evidence of isolated monoclonal gammopathy or smoldering myeloma, and the occurrence of AL amyloidosis in patients with symptomatic multiple myeloma or other B-cell lymphoproliferative disorders is unusual. The key event in the development of AL amyloidosis is the change in the secondary or tertiary structure of an abnormal monoclonal LC, which results in instable conformation. This conformational change is responsible for abnormal folding of the LC, rich in ? leaves, which assemble into monomers that stack together to form amyloid fibrils. Epidemiology AL amyloidosis is the most common type of systemic amyloidois in developed countries with an estimated incidence of 9 cases/million inhabitant/year. The average age of diagnosed patients is 65 years and less than 10% of patients are under 50. Clinical description The clinical presentation is protean, because of the wide number of tissues or organs that may be affected. The most common presenting symptoms are asthenia and dyspnoea, which are poorly specific and may account for delayed diagnosis. Renal manifestations are the most frequent, affecting two thirds of patients at presentation. They are characterized by heavy proteinuria, with nephrotic syndrome and impaired renal function in half of the patients. Heart involvement, which is present at diagnosis in more than 50% of patients, leading to restrictive cardiopathy, is the most serious complication and engages prognosis. Diagnostic methods The diagnosis relies on pathological examination of an involved site showing Congo red-positive amyloid deposits, with typical apple-green birefringence under polarized light, that stain positive with an anti-LC antibody by immunohistochemistry and/or immunofluorescence. Due to the systemic nature of the disease, non-invasive biopsies such as abdominal fat aspiration should be considered before taking biopsies from involved organs, in order to reduce the risk of bleeding complications. Differential diagnosis Systemic AL amyloidosis should be distinguished from other diseases related to deposition of monoclonal LC, and from other forms of systemic amyloidosis. When pathological studies have failed to identify the nature of amyloid deposits, genetic studies should be performed to diagnose hereditary amyloidosis. Management Treatment of AL amyloidosis is based on chemotherapy, aimed at controlling the underlying plasma clone that produces amyloidogenic LC. The hematological response should be carefully checked by serial measurements of serum free LC. The association of an alkylating agent with high-dose dexamethasone has proven to be effective in two thirds of patients and is considered as the current reference treatment. New agents used in the treatment of multiple myeloma are under investigation and appear to increase hematological response rates. Symptomatic measures and supportive care is necessary in patients with organ failure. Noticeably, usual treatments for cardiac failure (i.e. calcium inhibitors, ?-blockers, angiotensin converting enzyme inhibitors) are inefficient or even dangerous in patients with amyloid heart disease, that should be managed using diuretics. Amiodarone and pace maker implantation should be considered in patients with rhythm or conduction abnormalities. In selected cases, heart and kidney transplantation may be associated with prolonged patient and graft survival. Prognosis Survival in AL amyloidosis depends on the spectrum of organ involvement (amyloid heart disease being the main prognosis factor), the severity of individual organs involved and haematological response to treatment.

2012-01-01

144

Who Gets ALS?  

MedlinePLUS

... help create a world without ALS Join this nationwide movement by walking for those affected by ALS Home > About ALS Share Print Who Gets ALS? En español ALS is a disorder that affects the function of nerves and muscles. Based on U.S. population studies, a little over 5,600 people in the ...

145

/Cu-Al System  

NASA Astrophysics Data System (ADS)

Wettability and interfacial interaction of the Ta2O5/Cu-Al system were studied. Pure Cu does not wet the Ta2O5 substrate, and improved spreading is achieved when relatively a high fraction of the active element (~40 at.% Al) was added. The Al2O3 and AlTaO4 phases were observed at the Ta2O5/Cu-Al interface. A thermodynamic evaluation allowed us to suggest that the lack of wetting bellow 40 at.% Al is due to the presence of a native oxide, which covers the drop. The conditions of the native oxide decomposition and the formation of the volatile Al2O suboxide strongly depend on the vacuum level during sessile drop experiments and the composition of the Cu-Al alloy. In our case, Al contents greater than 40% provides thermodynamic conditions for the formation of Al2O (as a result of Al reaction with Al2O3) and the drop spreading. It was suggested that the final contact angle in the Ta2O5/Cu-Al system (50°) is determined by Ta adsorption on the newly formed alumina interlayer.

Kish, Orel; Froumin, Natalya; Aizenshtein, Michael; Frage, Nachum

2014-05-01

146

Amyotrophic Lateral Sclerosis (ALS)  

Microsoft Academic Search

ALS, commonly called Lou Gehrig's disease, is a devastating neurological dis- order characterized by selective upper and lower somatic, but not autonomic, motor neurone degeneration leading to paralysis and eventually death. The diagnosis of ALS requires the presence of both upper and lower motor neu- rone degeneration and progressive motor dysfunction. ALS occurs in 1 to 2.5 cases per 100,000

Chris G. Parsons; Wojciech Danysz

147

Al-Anon/Alateen  

MedlinePLUS

... Alcoholism is a complex problem. More... How does Al-Anon Work? In Al-Anon, members do not give direction or advice to ... meeting? If someone else’s drinking troubles you, attending Al-Anon and Alateen Family Group meetings can help. More... ...

148

Materialforschung Buckypapers als Dehnungssensoren  

NASA Astrophysics Data System (ADS)

Kohlenstoff-Nanoröhrchen leiten elektrischen Strom wesentlich besser als Kupfer, sind zwanzigmal so zugfest wie Stahl und dabei äußerst elastisch und flexibel. Aufgrund dieser Eigenschaften gelten die nur wenige Nanometer dicken Röhrchen als aussichtsreicher Rohstoff für vielfältige technische Anwendungen - beispielsweise auch als elektromechanische Sensoren.

Leute, Angelika

2004-07-01

149

Vermicomposting of Winery Wastes: A Laboratory Study  

Microsoft Academic Search

In Mediterranean countries, millions of tons of wastes from viticulture and winery industries are produced every year. This study describes the ability of the earthworm Eisenia andrei to compost different winery wastes (spent grape marc, vinasse biosolids, lees cakes, and vine shoots) into valuable agricultural products. The evolution of earthworm biomass and enzyme activities was tracked for 16 weeks of

ROGELIO NOGALES; CELIA CIFUENTES; EMILIO BENÍTEZ

2005-01-01

150

ALS longitudinal kickers  

SciTech Connect

This paper discusses the coupled-bunch instability and how it applies to the ALS accelerator. The longitudinal ALS kicker is part of the bunch-to-bunch feedback system planned to control coupled-bunch instabilities in the ALS. The mechanical features of the kicker are described, and the analytic tools developed to aid in the design are discussed. A method to predict the performance of the kicker in the accelerator from measurements on a prototype are described.

Voelker, F.

1992-10-01

151

ALS - The cost cutter  

NASA Astrophysics Data System (ADS)

The Advanced Launch System (ALS) development program will avail itself of existing technologies in the short term in order to produce an interim 'core' vehicle that may be operational by 1993; the full, booster-incorporating system objective will then be achieved in 1998. This programmatic 'decoupling' of booster and core vehicle development efforts will separate their funding peaks. The ALS program will cut costs by colocating manufacturing and launch facilities, using Al-Li alloys in booster primary structures, and aggressively applying 'paperless' CIM. The ALS launch vehicle configuration will be primarily determined by both payload requirements and flight frequency.

Colucci, Frank

1987-10-01

152

ALS: AN ETHICAL PERSPECTIVE  

Microsoft Academic Search

Amyotrophic lateral sclerosis (ALS), or Lou Gehrig's disease, is a relentlessly progressive, fatal and presently incurable motor neuron disorder caused by degeneration of both upper and lower neurons that control voluntary skeletal muscle. ALS variants include a progressive lower motor neuron disorder, Progressive Muscular Atrophy (PMA); a progressive upper motor neuron disorder, Primary Lateral Sclerosis (PLS); and a progressive disorder

Leo McCluskey

153

About ALS: FAQ  

MedlinePLUS

... on this web site. "Recent studies in the transgenic animal models of ALS (model of familial ALS) provide evidence that creatine is effective in protecting degenerating motor neurons and delaying disease deterioration in these mice. Clinical trials are of the utmost importance to ...

154

[Phenotypic variation in ALS].  

PubMed

Making a diagnosis of typical amyotrophic lateral sclerosis (ALS) is not a tough job, but when it comes to atypical forms of motor neuron disease (MND) which are not uncommon in clinical setting, we may have some difficulty to diagnose ALS/MND. There is striking phenotypic variation in sporadic ALS/MND, such as frail arm syndrome (brachial amyotrophic diplegia), pseudopolyneuritic form, hemiplegic type, ALS/MND with markedly extended involvement beyond the motor system, and MND with basophilic inclusion bodies. These variations must be recognized if physicians are to tailor advice on disease progression, prognosis, drug therapy, and care to the needs of the individual. Clinical trials of new therapeutic agents have been performed, on the assumption that patients with ALS/MND have the same underlying etiology, addressing the heterogeneous population of the patients under a single diagnostic category. This can be detrimental to the well-being of the individual, because clinical heterogeneity may mask drug effects in clinical trials. The attempt to categorize subgroups based on the clinical and pathological backgrounds within the spectrum of ALS/MND may be a critical step in facilitating clinical research in ALS/MND. Definition of clinicopathologic syndromes in patients with ALS/MND is an important challenging task that cannot be ignored. PMID:17432191

Sasaki, Shoichi

2006-11-01

155

[Environmental factors in ALS].  

PubMed

ALS is likely to be a disorder of multifactorial origin. Among all the factors that may increase the risk of ALS, environmental ones are being studied for many years, but in the recent years, several advances have pointed to a new interest in their potential involvement in the disease process, especially for the cyanotoxin BMAA. Food containing BMAA has been found on Guam, a well-known focus of ALS/parkinsonism/dementia and high levels of BMAA have been identified into the brain of these patients. The BMAA cyanotoxin is potentially ubiquitous and have also been found into the food of patients who died from ALS both in Europe and USA. BMAA can be wrongly integrated into the protein structure during mRNA traduction, competing with serine. This may induce abnormal protein folding and a subsequent cell death. Heavy metals, such as lead or mercury may be directly toxic for neuronal cells. Several works have suggested an increased risk of ALS in individuals chronically exposed to these metals. Exposure to pesticides has been suggested to be linked to an increased risk of developing ALS. The mechanism of their toxicity is likely to be mediated by paraoxonases. These proteins are in charge of detoxifying the organism from toxins, and particularly organophosphates. To date, there are insufficient scientific data to suggest that exposure to electromagnetic fields may increase the risk of having ALS. We are particularly missing longitudinal cohorts to demonstrate that risk. PMID:24703731

Juntas-Morales, Raul; Pageot, Nicolas; Corcia, Philippe; Camu, William

2014-05-01

156

Initial Symptoms of ALS  

MedlinePLUS

... Symptoms can begin in the muscles of speech, swallowing or in the hands, arms, legs or feet. Not all people with ALS experience the same symptoms or the same sequences or patterns of progression. But, progressive muscle weakness and paralysis ...

157

Primary AL Amyloidosis  

MedlinePLUS

... AL amyloidosis is a hematological disorder, associated with plasma cell dyscrasia that means an abnormal condition of ... fibrils, formed by an errant (monoclonal) group of plasma cells in the bone marrow, consist of abnormal ...

158

Isokinetic assessment in ALS.  

PubMed

Three measures of lower extremity function were compared in a homogenous population of ALS patients. Isokinetic dynamometry was shown to be a sensitive tool for change in strength over time. It demonstrated positive correlations with gait velocity as well as other behavioral measures. Manual muscle tests were relatively insensitive and no more reliable than isokinetics. Isokinetics are a useful adjunct in the assessment of ALS. PMID:11681399

Sufit, R; Clough, J A; Schram, M; Conrad, J; Erickson, L; Brooks, B R

1987-05-01

159

Al Qaeda Training Manual  

NSDL National Science Digital Library

The first resource is a US Department of Justice release of portions of an English translation of the Al Qaeda training manual located by police in Manchester, England during a search of an Al Qaeda member's home. The manual was found in a computer file described as "the military series" related to the "Declaration of Jihad." The cover and excerpts from the 12 chapters can be viewed as a .pdf file. Content of the text includes religious commentary, organizational tactics, guidelines for member selection, techniques for spying, and security measures. The DOJ does not provide the entire document because it does not want to encourage terrorism.

2001-01-01

160

ALS renewal moves forward  

NASA Astrophysics Data System (ADS)

As the result of an extensive long-term planning process involving all its stakeholders—management, staff, and users—the ALS has seen its future and is aggressively moving ahead to implement its vision for keeping the facility at the cutting edge for the next 2-3 decades. The evolving strategic plan now in place aims to renew the ALS so it can address a new generation of fundamental questions about size dependent and dimensional-confinement phenomena at the nanoscale; correlation and complexity in physical, biological, and environmental systems; and temporal evolution, assembly, dynamics and ultrafast phenomena. The renewal spans three areas: (1) increased staffing at beamlines to support the growing user community and safety professionals to keep an increasingly complex facility hazard free; (2) implementing advances in accelerator, insertion device, beamline, and detector technology that will make it possible for ALS users to address emerging grand scientific and technological challenges with incisive world-class tools; and (3) construction of a user support building and guest housing that will increase the safety and user friendliness of the ALS by providing users office, meeting, experiment staging, and laboratory space for their work and on-site accommodations at reasonable rates.

Falcone, R. W.; Feinberg, B.; Hussain, Z.; Kirz, J.; Krebs, G. F.; Padmore, H. A.; Robin, D. S.; Robinson, A. L.

2007-11-01

161

Al Shanker Remembers.  

ERIC Educational Resources Information Center

In a 1996 interview shortly before his death, Al Shanker, longtime president of the American Federation of Teachers, discussed such topics as: his own educational experiences; how he learned about political fighting in the Boy Scouts; the appeal of socialism; multinational corporations and the nation state; teaching tough students; and John Dewey…

American Educator, 2000

2000-01-01

162

ALS insertion devices  

SciTech Connect

The Advanced Light Source (ALS), the first US third generation synchrotron radiation source, is currently under construction at the Lawrence Berkeley Laboratory. The low-emittance, 1.5 GeV electron storage ring and the insertion devices are specifically designed to produce high brightness beams in the UV to soft X-Ray range. The planned initial complement of insertion devices includes four 4.6 m long undulators, with period lengths of 3.9 cm, 5.0 cm (2) and 8.0 cm, and a 2.9 m long wiggler of 16 cm period length. Undulator design is well advanced and fabrication has begun on the 5.0 cm and 8.0 cm period length undulators. This paper discusses ALS insertion device requirements; general design philosophy; and design of the magnetic structure, support structure/drive systems, control system and vacuum system. 18 refs., 9 figs., 5 tabs.

Hoyer, E.; Chin, J.; Halbach, K.; Hassenzahl, W.V.; Humphries, D.; Kincaid, B.; Lancaster, H.; Plate, D.

1990-11-01

163

Al Parker: American Illustrator  

NSDL National Science Digital Library

This tribute to Al Parker, the noted magazine illustrator and artist, was fashioned from extensive holdings at the Washington University Library in St. Louis. Known as "The Dean of Illustrators," Al Parker attended school at the St. Louis School of Fine Arts at Washington University and went on to become of the most prolific and important American illustrators of the twentieth century. Parker was best-known for his modernist deployment of line, patterning, and bold, flat colors, which helped shape the general "look" of the period from the 1930s to the 1960s. Using short clips of Parker's original illustrations and drawings, this exhibit offers a glimpse into his work and contributions to the medium. Of particular interest is the section devoted to Parker's famous "Mother-Daughter" covers for the Ladies Home Journal, which began in 1939 and ran for 17 years.

2001-01-01

164

Jasechko et al. reply.  

PubMed

replying to A. M. J. Coenders-Gerrits et al. 506, http://dx.doi.org/10.1038/nature12925 (2014)In their Comment, Coenders-Gerrits et al. suggest that our conclusion that transpiration dominates the terrestrial water cycle is biased by unrepresentative input data and optimistic uncertainty ranges related to runoff, interception and the isotopic compositions of transpired and evaporated moisture. We clearly presented the uncertainties applied in our Monte-Carlo sensitivity analysis, we reported percentile ranges of results rather than standard deviations to best communicate the nonlinear nature of the isotopic evaporation model, and we highlighted that the uncertainty in our calculation remains large, particularly in humid catchments (for example, figure 2 in our paper). PMID:24522604

Jasechko, Scott; Sharp, Zachary D; Gibson, John J; Birks, S Jean; Yi, Yi; Fawcett, Peter J

2014-02-13

165

ALS Project Management Manual  

SciTech Connect

This manual has been prepared to help establish a consistent baseline of management practices across all ALS projects. It describes the initial process of planning a project, with a specific focus on the production of a formal project plan. We feel that the primary weakness in ALS project management efforts to date stems from a failure to appreciate the importance of ''up-front'' project planning. In this document, we present a guide (with examples) to preparing the documents necessary to properly plan, monitor, and control a project's activities. While following the manual will certainly not guarantee good project management, failure to address the issues we raise will dramatically reduce the chance of success. Here we define success as meeting the technical goals on schedule and within the prescribed budget.

Krupnick, Jim; Harkins, Joe

2000-05-01

166

AL Users' Manual. Third Edition.  

National Technical Information Service (NTIS)

AL is a high-level programming language for manipulator control useful in industrial assembly research. The document describes the current state of the AL system now in operation at the Stanford Artificial Intelligence Laboratory, and teaches the reader h...

S. Mujtaba R. Goldman

1981-01-01

167

Al Jazirah, Sudan  

NASA Technical Reports Server (NTRS)

Al Jazirah (also Gezira) is one of the 26 states of Sudan. The state lies between the Blue Nile and the White Nile in the east-central region of the country. It is a well populated area suitable for agriculture. The area was at the southern end of Nubia and little is known about its ancient history and only limited archaeological work has been conducted in this area. The region has benefited from the Gezira Scheme, a program to foster cotton farming begun in 1925. At that time the Sennar Dam and numerous irrigation canals were built. Al Jazirah became the Sudan's major agricultural region with more than 2.5 million acres (10,000 km) under cultivation. The initial development project was semi-private, but the government nationalized it in 1950. Cotton production increased in the 1970s but by the 1990s increased wheat production has supplanted a third of the land formerly seeded with cotton.

The image was acquired December 25, 2006, covers an area of 56 x 36.4 km, and is located near 14.5 degrees north latitude, 33.1 degrees east longitude.

The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

2008-01-01

168

Nine Tips To Help Faith Leaders and Their Communities Address Teen Pregnancy = Nueve consejos para ayudar a lideres espirituales y sus comunidades a hacerle frente al problema del embarazo en la adolescencia.  

ERIC Educational Resources Information Center

To support faith communities in protecting teenage boys and girls from too-early sexual activity and teen pregnancy, the National Campaign To Prevent Teen Pregnancy's Task Force on Religion and Public Values has compiled these nine tips which summarize a wealth of experience and advice from faith leaders around the country. The members of the Task…

National Campaign To Prevent Teen Pregnancy, Washington, DC.

169

Al Mashriq: Lebanon  

NSDL National Science Digital Library

Part of the Al-Mashriq online Web resource for countries located in the Levant, this site is devoted to providing a host of materials, thematically organized, about the country of Lebanon. Persons seeking to read a bit about Lebanon's early history will want to read the first chapter of Kamal Salibi's "A House of Many Mansions-The History of Lebanon," which is provided here. For those looking for a geographic orientation to the landscape of Lebanon, an interactive map provides a number of photographs and brief remarks on various important cities and cultural sites, such as Beirut and the Roman temples at Baalbak. Along with these sections, the site also offers thematic sections devoted to education, food, maps, money, politics, and religion that will be useful to those students looking for background information on Lebanon.

170

Doppelthydrophile Blockcopolymere als Mineralisationstemplate  

NASA Astrophysics Data System (ADS)

Die vorliegende Arbeit beschäftigt sich mit der Synthese und den Eigenschaften von doppelthydrophilen Blockcopolymeren und ihrer Anwendung in einem biomimetischen Mineralisationsprozeß von Calciumcarbonat und Bariumsulfat. Doppelthydrophile Blockcopolymere bestehen aus einem hydrophilen Block, der nicht mit Mineralien wechselwirkt und einem zweiten Polyelektrolyt-Block, der stark mit Mineraloberflächen wechselwirkt. Diese Blockcopolymere wurden durch ringöffnende Polymerisation von N-carboxyanhydriden (NCA's) und a-methoxy-?-amino[poly(ethylene glycol)] PEG-NH2 als Initiator hergestellt. Die hergestellten Blockcopolymere wurden als effektive Wachstumsmodifikatoren für die Kristallisation von Calciumcarbonat und Bariumsulfat Mineralien eingesetzt. Die so erhaltenen Mineralpartikel (Kugeln, Hantel, eiförmige Partikel) wurden durch Lichtmikroskopie in Lösung, SEM und TEM charakterisiert. Röntgenweitwinkelstreuung (WAXS) wurde verwendet, um die Modifikation von Calciumcarbonat zu ermitteln und die Größe der Calciumcarbonat- und Bariumsulfat-Nanopartikel zu ermitteln. This work describes the synthesis and characterization of double hydrophilic block copolymers and their use in a biomimetic mineralization process of Calcium Carbonate and Barium Sulfate. Double hydrophilic block copolymers consist of a hydrophilic block that does not interact with minerals and another hydrophilic polyelectrolyte block that strongly interacts with mineral surfaces. These polymers were synthesised via ring opening polymerisation of N-carboxyanhydride (NCA), and the first hydrophilic block a-methoxy-?-amino[poly(ethylene glycol)] PEG-NH2 was used as an initiator. The prepared block copolymers were used as effective crystal growth modifiers to control the crystallization of Calcium Carbonate and Barium Sulfate minerals. The resulting mineral particles (spheres, dumbbells, egg-like particles) were characterised by light microscopy in solution, by SEM, and by TEM. X-Ray scattering measurements (WAXS) were used to prove the modification of Calcium Carbonate particles and to calculate the size of Calcium Carbonate and Barium Sulfate nanoparticles.

Kasparova, Pavla

2002-07-01

171

Electromigration Testing of Al-Alloy Films.  

National Technical Information Service (NTIS)

A search for reliability improvement of Al film interconnections has led to the introduction of Al-Alloy films such as Al+Cu, Al+Cu+Si and so on. This report describes the results of an in-depth study of Al, Al+Cu (2 wt % Cu) and Al+Cu+Si (2 wt % Cu + 1% ...

P. B. Ghate

1980-01-01

172

Correlation between Al 2O 3 particles and interface of Al–Al 2O 3 coatings by cold spray  

Microsoft Academic Search

Al–Al2O3 composite coatings with different Al2O3 particle shapes were prepared on Si and Al substrate by cold spray. The powder compositions of metal (Al) and ceramic (Al2O3) having different sizes and agglomerations were varied into ratios of 10:1wt% and 1:1wt%. Al2O3 particles were successfully incorporated into the soft metal matrix of Al. It was found that crater formation between the

Ha Yong Lee; Se Hun Jung; Soo Yong Lee; Young Ho You; Kyung Hyun Ko

2005-01-01

173

Al, Al/C and Al/Si implantations in 6H-SiC  

NASA Astrophysics Data System (ADS)

Multiple-energy Al implantations were performed with and without C or Si coimplantations into 6H-SiC epitaxial layers and bulk substrates at 850°C. The C and Si co-implantations were used as an attempt to improve Al acceptor activation in SiC. The implanted material was annealed at 1500, 1600, and 1650°C for 45 min. The Al implants are thermally stable at all annealing temperatures and Rutherford backscattering via channeling spectra indicated good lattice quality in the annealed Al-implanted material. A net hole concentration of 8 × 1018 cm-3 was measured at room temperature in the layers implanted with Al and annealed at 1600°C. The C or Si co-implantations did not yield improvement in Al acceptor activation. The co-implants resulted in a relatively poor crystal quality due to more lattice damage compared to Al implantation alone. The out-diffusion of Al at the surface is more for 5Si co-implantation compared to Al implant alone, where 5Si means a Si/Al dose ratio of 5.

Rao, Mulpuri V.; Griffiths, Peter; Gardner, Jason; Holland, O. W.; Ghezzo, M.; Kretchmer, J.; Kelner, G.; Freitas, J. A.

1996-01-01

174

Frequently Asked Questions about ALS and the ALS Registry  

MedlinePLUS

... cancer. However, there are no registries or ongoing tracking efforts for ALS in the United States. The ... primary lateral sclerosis will develop problems with nerve cells for both upper and ... part, locations, and phone numbers for more details. Use the “ALS Clinical ...

175

75 FR 62858 - United States, et al.  

Federal Register 2010, 2011, 2012, 2013

...DEPARTMENT OF JUSTICE Antitrust Division United States, et al. v. American Express Company, et al.; Proposed Final Judgment and Competitive Impact...District of New York in United States of America, et al. v. American Express Company, et al.,...

2010-10-13

176

76 FR 38700 - United States, et al.  

Federal Register 2010, 2011, 2012, 2013

...DEPARTMENT OF JUSTICE Antitrust Division United States, et al. v. American Express Company, et al.; Public Comments and Response on Proposed...on the proposed Final Judgment in United States, et al. v. American Express Company, et al.,...

2011-07-01

177

Microstructure Evolution and Mechanical Properties of Al\\/Al-Mg\\/Al composite sheet metals  

Microsoft Academic Search

Two different types of aluminum alloys of AA1050 and AA5182 were used to manufacture Al\\/Al-Mg\\/Al composite sheet metals by roll bonding technology at room temperature. The composite sheet metals were annealed at 400 °C and carried out uniaxial tension tests to investigate mechanical properties. Macroscopic mechanical properties are strongly dependent on the volume (or thickness) fraction of two component layers.

Jaehyung Cho; Su-Hyeon Kim; Hyoung-Wook Kim; Cha-Yong Lim; Eun-Young Kim; Shi-Hoon Choi

2011-01-01

178

Reliable Au Wire Bonding to Al/Ti/Al Pad  

NASA Astrophysics Data System (ADS)

In this paper, we describe bond degradation and the bondability of an Au wire to a thin-Al/Ti/Al pad. It is found that the pad structure of Al(300 nm)/Ti(300 nm)/Al(1000 nm) is useful for the prevention of bond degradation upon heat treatment at 473 K for 3.6 Ms. Use of the pad necessitated an annealing temperature of at least 723 K, because of its lower initial bond resistance. With heat treatment after thermosonic ball bonding, the bond resistance is almost invariable and the bond shear strength does not decrease. The life of the bond between the Au wire and the pad is extended with thickening of the Ti layer.

Ueno, Hiroshi

1993-05-01

179

AlN/Fe/AlN nanostructures for magnetooptic magnetometry  

NASA Astrophysics Data System (ADS)

AlN/Fe/AlN/Cu nanostructures with ultrathin Fe grown by sputtering on Si substrates are evaluated as probes for magnetooptical (MO) mapping of weak currents. They are considered for a laser wavelength of ? = 410 nm (3.02 eV) and operate at oblique light incidence angles, ?(0), to enable detection of both in-plane and out-of-plane magnetization. Their performance is evaluated in terms of MO reflected wave electric field amplitudes. The maximal MO amplitudes in AlN/Fe/AlN/Cu are achieved by a proper choice of layer thicknesses. The nanostructures were characterized by MO polar Kerr effect at ?(0) ? 5° and longitudinal Kerr effect spectra (?(0) = 45°) at photon energies between 1 and 5 eV. The nominal profiles were refined using a model-based analysis of the spectra. Closed form analytical expressions are provided, which are useful in the search for maximal MO amplitudes.

Lišková-Jakubisová, E.; VišÅovský, Š.; Široký, P.; Hrabovský, D.; Pištora, J.; Harward, I.; Celinski, Z.

2014-05-01

180

Reply to Gopalswamy et al.  

NASA Technical Reports Server (NTRS)

The comment of Gopalswamy et al. (thereafter GMY) relates to a letter discussing coronal mass ejections (CMEs), interplanetary ejecta and geomagnetic storms. GMY contend that Cane et al. incorrectly identified ejecta (interplanetary CMEs) and hypothesize that this is because Cane et al. fail to understand how to separate ejecta from "shock sheaths" when interpreting solar wind and energetic particle data sets. They (GMY) are wrong be cause the relevant section of the paper was concerned with the propagation time to 1 AU of any potentially geoeffective structures caused by CMEs, i.e. upstream compression regions with or without shocks, or ejecta. In other words, the travel times used by Cane et al. were purposefully and deliberately distinct from ejecta travel times (except for those slow ejecta, approx. 30% of their events, which generated no upstream features), and no error in identification was involved. The confusion of GMY stems from the description did not characterize the observations sufficiently clearly.

Cane, H. V.; Richardson, I. G.

2003-01-01

181

Comparison of one and two-neutron transfer near the coulomb barrier for the 27 Al( 18 O, 16 O) 29 Al, 27 Al( 18 0, 17 O) 28 Al and 27 Al( 13 C, 12 C) 28 Al reactions  

Microsoft Academic Search

Total reaction cross sections for the transfer reactions27Al(18O,16O)29Al,27Al(18O,17O)28Al and27Al(13C,12C)28Al are reported for center-of-mass energies between 13 and 20 MeV for18O projectiles and between 11 and 17.5 MeV for13C projectiles. The reaction products,29Al and28Al, beta decay to29Si and28Si, respectively, and the subsequent? decays of29Si and28Si were measured. Due to the relatively long beta decay half lives, data were taken in a

S. A. Schiller; J. S. Eck

1975-01-01

182

Comparing the Thermodynamic Behaviour of Al(1)+ZrO2(s) to Al(1)+Al2O3(s)  

NASA Technical Reports Server (NTRS)

In an effort to better determine the thermodynamic properties of Al(g) and Al2O(g). the vapor in equilibrium with Al(l)+ZrO2(s) was compared to the vapor in equilibrium with Al(l)+Al2O3(s) over temperature range 1197-to-1509K. The comparison was made directly by Knudsen effusion-cell mass spectrometry with an instrument configured for a multiple effusion-cell vapor source (multi-cell KEMS). Second law enthalpies of vaporization of Al(g) and Al2O(g) together with activity measurements show that Al(l)+ZrO2(s) is thermodynamically equivalent to Al(l)+Al2O3(s), indicating Al(l) remained pure and Al2O3(s) was present in the ZrO2-cell. Subsequent observation of the Al(l)/ZrO2 and vapor/ZrO2 interfaces revealed a thin Al2O3-layer had formed, separating the ZrO2-cell from Al(l) and Al(g)+Al2O(g), effectively transforming it into an Al2O3 effusion-cell. This behavior agrees with recent observations made for Beta-NiAl(Pt) alloys measured in ZrO2 effusion-cell.

Copland, Evan

2004-01-01

183

High Density Sliding at Ta/Al and Al/Al Interfaces  

SciTech Connect

We present 3D-nonequilibrium molecular dynamics results for the velocity dependence of the frictional force at smooth sliding interfaces for Ta and Al single crystals. For Ta/Al we consider Al(100)/Ta(100) and Al(111)/Ta(110) interfaces sliding along [001] and [11(bar sign)0]fcc /[001]bcc respectively. These are compared with Al(111)/Al(100) interfaces at the same loads, corresponding to a pressure of 15 GPa. Both interfacial pairs show similar behavior in the velocity dependence of the frictional force: a low velocity regime with an increasing frictional force followed by a strain induced transformation regime at velocities above approximately 1/10 the transverse sound speed, followed by a fluidized interface at high velocities. For both interfacial pairs, the high velocity dependence of the frictional force exhibits power law behavior, Ft {proportional_to} v-{beta} with {beta}=3/4. We discuss the structural changes that influence dissipation in each of these regimes.

Hammerberg, J. E.; Germann, T. C. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Ravelo, R. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Physics Dept., University of Texas -- El Paso, El Paso, TX 79968-0515 (United States); Materials Research Institute, University of Texas - El Paso, El Paso, TX 79968-0515 (United States)

2006-07-28

184

Neuroproteomics: an insight into ALS.  

PubMed

Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease of unknown aetiology. Diagnosis is made through physical examination, electrophysiological findings, and by excluding other conditions. There is not a single biomarker that concludes the diagnosis. The aim of this study was to investigate differentially expressed proteins in cerebrospinal fluid (CSF) of ALS patients compared to control subjects, with the purpose to identify a panel of possible biomarkers for the disease. The differentially expressed spots/proteins were submitted to two-dimensional (2D) electrophoresis and recognized with matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) mass spectrometry. Parkin-like and many iron and zinc binding were some of the proteins found in ALS CSF. Parkin is a ligase involved in ubiquitin-proteasome pathway and mutations in the parkin gene are the most common cause of recessive familial Parkinson's disease. Iron and zinc are involved with many important metabolic processes and are related to neurodegenerative disease. Common features of ALS comprise failure of the ubiquitin-proteasome system and increased levels of metal ions in the brain. Therefore, the identification of these proteins can be a significant step in ALS research. These and other identified proteins are discussed in this study. PMID:23146297

Mendonça, D M F; Pizzati, L; Mostacada, K; de S Martins, S C; Higashi, R; Ayres Sá, L; Moura Neto, V; Chimelli, L; Martinez, A M B

2012-12-01

185

Interaction of Al-Si, Al-Ge, and Zn-Al eutectic alloys with SiC\\/Al discontinuously reinforced metal matrix composites  

Microsoft Academic Search

Interactions between Al-Si, Al-Ge, and Zn-Al eutectic alloys with SiC whisker-reinforced aluminium metal matrix composites were studied as a function of temperature above the eutectic melting temperature. Penetration extended several millimetres into the composite for the Al-Si and Al-Ge alloys but was restricted to a thin surface layer (50 µm) for the Zn-Al alloy. The extent of the penetration zone

W. C. Moshier; J. S. Ahearn; D. C. Cooke

1987-01-01

186

Potential utilization of guar gum industrial waste in vermicompost production  

Microsoft Academic Search

Recycling of guar gum industrial waste through vermitechnology was studied under laboratory conditions by using composting earthworm Perionyx excavatus (Perrier). Three different combination of guar gum industrial waste namely guar gum industrial waste:cow dung:saw dust in 40:30:30 ratio (T1), guar gum industrial waste:cow dung:saw dust in 60:20:20 ratio (T2), and guar gum industrial waste:cow dung:saw dust in 75:15:10 ratio (T3)

Surendra Suthar

2006-01-01

187

ALS - A unique design approach  

NASA Astrophysics Data System (ADS)

An advanced launch system (ALS), which is intended to be flexible and to deliver a wide range of payloads at a reduced cost, is discussed. The ALS concept also features total quality management, modular subsystems, standardized interfaces, standardized missions, and off-line payload encapsulation. The technological improvements include manufacturing of dry structures, use of composite materials, adaptive guidance and control systems, and laser-initiated radar systems. The operational improvements range from paperless management, to rocket engine leak detection devices and automated ground operations.

Chamberlain, Roger A.

1990-09-01

188

Al-Biruni's mechanical calendar.  

NASA Astrophysics Data System (ADS)

This paper is concerned with a mechanical calendar described by the great scientist al-Biruni, who died in 440/1048. The description occurs in a book devoted to the construction of various types of astrolabe and related instruments. The Arabic text presented in this paper was prepared from three manuscripts. This is preceded by a brief introduction which gives a sketch of the life and works of al-Biruni together with information about the provenance and contents of the three manuscripts. The text is followed by an English translation and the paper concludes with a technical commentary.

Hill, D. R.

189

Andalusian astronomy: al-Zij al-Muqtabis of Ibn al-Kammâd.  

NASA Astrophysics Data System (ADS)

In the twelfth century the Arabic astronomer Ibn al-Kammâd, living in Islamic Spain, composed three sets of astronomical tables, called "zijes". The zijes were largely based on the work of predecessors, going back to Ptolemy on the one hand, and Hindu astronomers on the other. None of his zijes survived in the original Arabic, but a Latin manuscript contains a translation of an apparently complete zij, the "al-Zij al-Muqtabis". This paper examines the body of astronomical knowledge contained in this zij. Specifically, it is shown that one can gain valuable information on the solar theory of the Islamic astronomers from this translation. Furthermore, the theory of lunar and solar eclipses in the work is analyzed, and tables of mean planetary and solar motions are discussed. In addition, tables for the motion of the vernal equinox, star tables, and several topics of Islamic spherical astronomy are examined.

Chabás, J.; Goldstein, B. R.

1994-12-01

190

Glutamate Receptor Aptamers and ALS.  

National Technical Information Service (NTIS)

Excitotoxicity is one of the leading causes for amyotrophic lateral sclerosis (ALS). Our goal was to develop a novel class of powerful aptamer- based, anti-excitotoxic inhibitors against GluR2Qflip, a key AMPA receptor subunit that controls the calcium pe...

L. Niu

2009-01-01

191

AL Amyloidosis and Agent Orange  

MedlinePLUS

... with Agent Orange » AL Amyloidosis and Agent Orange Public Health Public Health Public Health Home Military Exposures Military Exposures Home 4 Ways ... Publications & Reports About Us About the Office of Public Health Post-Deployment Health Clinical Public Health About Clinical ...

192

Dynamic Modeling of ALS Systems  

NASA Technical Reports Server (NTRS)

The purpose of dynamic modeling and simulation of Advanced Life Support (ALS) systems is to help design them. Static steady state systems analysis provides basic information and is necessary to guide dynamic modeling, but static analysis is not sufficient to design and compare systems. ALS systems must respond to external input variations and internal off-nominal behavior. Buffer sizing, resupply scheduling, failure response, and control system design are aspects of dynamic system design. We develop two dynamic mass flow models and use them in simulations to evaluate systems issues, optimize designs, and make system design trades. One model is of nitrogen leakage in the space station, the other is of a waste processor failure in a regenerative life support system. Most systems analyses are concerned with optimizing the cost/benefit of a system at its nominal steady-state operating point. ALS analysis must go beyond the static steady state to include dynamic system design. All life support systems exhibit behavior that varies over time. ALS systems must respond to equipment operating cycles, repair schedules, and occasional off-nominal behavior or malfunctions. Biological components, such as bioreactors, composters, and food plant growth chambers, usually have operating cycles or other complex time behavior. Buffer sizes, material stocks, and resupply rates determine dynamic system behavior and directly affect system mass and cost. Dynamic simulation is needed to avoid the extremes of costly over-design of buffers and material reserves or system failure due to insufficient buffers and lack of stored material.

Jones, Harry

2002-01-01

193

Sobrevivir al cáncer: comer bien  

Cancer.gov

Sobrevivir al cáncer: comer bien Por el Instituto Nacional del Cáncer Bethesda, MD. - Más de 13 millones de personas que viven en Estados Unidos han recibido un diagnóstico de cáncer. Muchas de las personas que han tenido cáncer quieren seguir una

194

The structure and mechanical properties of Fe 3Al–30 vol.% Al 2O 3 nanocomposite  

Microsoft Academic Search

Fe3Al–30vol.% Al2O3 nanocomposite powder was fabricated via two routes. The first route involved the ball milling of Fe2O3–Al–Fe powder mixtures to produce in situ Al2O3 nanoparticles in Fe3Al matrix via mechanochemical reaction of Fe2O3 and Al. In the second route, Fe3Al–Al2O3 nanocomposite was prepared by ex situ addition of Al2O3 nanopowder to Fe–Al powder mixture followed by ball milling. The

M. Khodaei; M. H. Enayati; F. Karimzadeh

2009-01-01

195

Identification of Candida albicans ALS2 and ALS4 and Localization of Als Proteins to the Fungal Cell Surface  

PubMed Central

Additional genes in the growing ALS family of Candida albicans were isolated by PCR screening of a genomic fosmid library with primers designed from the consensus tandem-repeat sequence of ALS1. This procedure yielded fosmids encoding ALS2 and ALS4. ALS2 and ALS4 conformed to the three-domain structure of ALS genes, which consists of a central domain of tandemly repeated copies of a 108-bp motif, an upstream domain of highly conserved sequences, and a domain of divergent sequences 3? of the tandem repeats. Alignment of five predicted Als protein sequences indicated conservation of N- and C-terminal hydrophobic regions which have the hallmarks of secretory signal sequences and glycosylphosphatidylinositol addition sites, respectively. Heterologous expression of an N-terminal fragment of Als1p in Saccharomyces cerevisiae demonstrated function of the putative signal sequence with cleavage following Ala17. This signal sequence cleavage site was conserved in the four other Als proteins analyzed, suggesting identical processing of each protein. Primary-structure features of the five Als proteins suggested a cell-surface localization, which was confirmed by indirect immunofluorescence with an anti-Als antiserum. Staining was observed on mother yeasts and germ tubes, although the intensity of staining on the mother yeast decreased with elongation of the germ tube. Similar to other ALS genes, ALS2 and ALS4 were differentially regulated. ALS4 expression was correlated with the growth phase of the culture; ALS2 expression was not observed under many different in vitro growth conditions. The data presented here demonstrate that ALS genes encode cell-surface proteins and support the conclusion that the size and number of Als proteins on the C. albicans cell surface vary with strain and growth conditions.

Hoyer, L. L.; Payne, T. L.; Hecht, J. E.

1998-01-01

196

AlSb/InAs/AlSb quantum wells  

NASA Astrophysics Data System (ADS)

Researchers studied the InAs/AlSb system recently, obtaining 12nm wide quantum wells with room temperature mobilities up to 28,000 cm(exp 2)/V center dot S and low-temperature mobilities up to 325,000 cm(exp 2)/V center dot S, both at high electron sheet concentrations in the 10(exp 12)/cm(exp 2) range (corresponding to volume concentrations in the 10(exp 18)/cm(exp 2) range). These wells were not intentionally doped; the combination of high carrier concentrations and high mobilities suggest that the electrons are due to not-intentional modulation doping by an unknown donor in the AlSb barriers, presumably a stoichiometric defect, like an antisite donor. Inasmuch as not intentionally doped bulk AlSb is semi-insulating, the donor must be a deep one, being ionized only by draining into the even deeper InAs quantum well. The excellent transport properties are confirmed by other observations, like excellent quantum Hall effect data, and the successful use of the quantum wells as superconductive weak links between Nb electrodes, with unprecendentedly high critical current densities. The system is promising for future field effect transistors (FETs), but many processing problems must first be solved. Although the researchers have achieved FETs, the results so far have not been competitive with GaAs FETs.

Kroemer, Herbert

1990-07-01

197

AlSb/InAs/AlSb quantum wells  

NASA Technical Reports Server (NTRS)

Researchers studied the InAs/AlSb system recently, obtaining 12nm wide quantum wells with room temperature mobilities up to 28,000 cm(exp 2)/V center dot S and low-temperature mobilities up to 325,000 cm(exp 2)/V center dot S, both at high electron sheet concentrations in the 10(exp 12)/cm(exp 2) range (corresponding to volume concentrations in the 10(exp 18)/cm(exp 2) range). These wells were not intentionally doped; the combination of high carrier concentrations and high mobilities suggest that the electrons are due to not-intentional modulation doping by an unknown donor in the AlSb barriers, presumably a stoichiometric defect, like an antisite donor. Inasmuch as not intentionally doped bulk AlSb is semi-insulating, the donor must be a deep one, being ionized only by draining into the even deeper InAs quantum well. The excellent transport properties are confirmed by other observations, like excellent quantum Hall effect data, and the successful use of the quantum wells as superconductive weak links between Nb electrodes, with unprecendentedly high critical current densities. The system is promising for future field effect transistors (FETs), but many processing problems must first be solved. Although the researchers have achieved FETs, the results so far have not been competitive with GaAs FETs.

Kroemer, Herbert

1990-01-01

198

Al-Anon and recovery.  

PubMed

The history of Al-Anon and its current demographics are reviewed. In order to understand 12-step recovery and psychotherapy for family members of alcoholics, the concept of codependence is defined with a set of diagnostic criteria consistent with the DSM-III-R definition of personality traits and disorders. At the core of codependence are denial and an unrealistic relationship to willpower. The therapeutic implications of considering codependence as a personality disorder are explored, as are the characteristics that make codependence unique among personality disorders: the central role of denial and the existence of a self-help organization to facilitate recovery. The dynamics of working the 12 steps on codependent characteristics are outlined. A synergistic relationship between psychotherapy and the 12 steps is described. Special attention is given the emergence of Al-Anon adult children of alcoholic meetings, and the future of codependence is discussed. PMID:2648500

Cermak, T L

1989-01-01

199

First-principles calculations on Al/AlB 2 interfaces  

NASA Astrophysics Data System (ADS)

The AlB 2 (1 1 1) surfaces and Al (1 1 1)/AlB 2 (0 0 0 1) interface were studied by first-principles calculations to clarify the heterogeneous nucleation potential of ?-Al grains on AlB 2 particles in purity aluminium and hypoeutectic Al-Si alloys. It is demonstrated that the AlB 2 (0 0 0 1) surface models with more than nine atomic layers exhibit bulk-like interior, wherein the interlayer relaxations localized within the top three layers are well converged. The outmost layer of AlB 2 free surface having a preference of metal atom termination is evidenced by surface energy calculations. With Al atoms continuing the natural stacking sequence of bulk AlB 2, Al-Al metallic bonds are formed across interface during the combination of Al atoms with Al-terminated AlB 2 surface. The calculated interfacial energy of the Al/AlB 2 interface is much larger than that between the ?-Al and aluminium melts, elucidating the poor nucleation potency of ?-Al grains on AlB 2 particles from thermodynamic considerations.

Han, Y. F.; Dai, Y. B.; Wang, J.; Shu, D.; Sun, B. D.

2011-06-01

200

TiN/Al2O3/TiAlON Composite.  

National Technical Information Service (NTIS)

The present invention pertains to novel improved density ceramic composites of TiN/Al2O3/TiAlON in which there is no spinel and no AlN, but alpha-alumina, titanium nitride, and titanium aluminum oxynitride. In general, the improved density TiN/Al2O3/TiAlO...

K. Han

1990-01-01

201

[Coagulation behavior of Al13 species].  

PubMed

Coagulation behavior of Al13 species was examined in synthetic water with high alkalinity and high humic acid concentration from viewpoint of the transformation of Al hydrolysis products during the coagulation process. The results indicated that coagulation efficiency of Al coagulants positively correlated with the content of Al13 in the coagulation process. Aluminum chloride (AlCl3) was more effective than polyaluminum chloride (PACI) in removing turbidity and dissolved organic matter in the synthetic water because AlCl3 could not only generate Al13 species but also function as pH control agent in the coagulation process. During coagulation process pH control can improve coagulation process through regulating Al speciation, and AlCl3 benefited most from pH control. PMID:17304842

Hu, Cheng-zhi; Liu, Hui-juan; Qu, Jiu-hui

2006-12-01

202

Tensile Behavior of Al2O3/FeAl + B and Al2O3/FeCrAlY Composites  

NASA Technical Reports Server (NTRS)

The feasibility of Al2O3/FeAl + B and Al2O3/FeCrAlY composites for high-temperature applications was assessed. The major emphasis was on tensile behavior of both the monolithics and composites from 298 to 1100 K. However, the study also included determining the chemical compatibility of the composites, measuring the interfacial shear strengths, and investigating the effect of processing on the strength of the single-crystal Al2O3 fibers. The interfacial shear strengths were low for Al203/FeAl + B and moderate to high for Al203/FeCrAlY. The difference in interfacial bond strengths between the two systems affected the tensile behavior of the composites. The strength of the Al203 fiber was significantly degraded after composite processing for both composite systems and resulted in poor composite tensile properties. The ultimate tensile strength (UTS) values of the composites could generally be predicted with either rule of mixtures (ROM) calculations or existing models when using the strength of the etched-out fiber. The Al2O3/FeAl + B composite system was determined to be unfeasible due to poor interfacial shear strengths and a large mismatch in coefficient of thermal expansion (CTE). Development of the Al2O3/FeCrAlY system would require an effective diffusion barrier to minimize the fiber strength degradation during processing and elevated temperature service.

Draper, S. L.; Eldridge, J. I.; Aiken, B. J. M.

1995-01-01

203

Mg isotopic heterogeneity, Al-Mg isochrons, and canonical 26Al/27Al in the early solar system  

NASA Astrophysics Data System (ADS)

Abstract-There is variability in the Mg isotopic composition that is a reflection of the widespread heterogeneity in the isotopic composition of the elements in the solar system at approximately 100 ppm. Measurements on a single calcium-aluminum-rich inclusion (CAI) gave a good correlation of 26Mg/24Mg with 27<span class="hlt">Al</span>/24Mg, yielding an isochron corresponding to an initial (26<span class="hlt">Al</span>/27<span class="hlt">Al</span>)o = (5.27 ± 0.18) × 10-5 and an initial (26Mg/24Mg)o = -0.127 ± 0.032‰ relative to the standard. This isochron is parallel to that obtained by <link href="#b41 #b42">Jacobsen et <span class="hlt">al</span>. (2008), but is distinctively offset. This demonstrates that there are different initial Mg isotopic compositions in different samples with the same 26<span class="hlt">Al</span>/27<span class="hlt">Al</span>. No inference about uniformity/heterogeneity of 26<span class="hlt">Al</span>/27<span class="hlt">Al</span> on a macro scale can be based on the initial (26Mg/24Mg)o values. Different values of 26<span class="hlt">Al</span>/27<span class="hlt">Al</span> for samples representing the same point in time would prove heterogeneity of 26<span class="hlt">Al</span>/27<span class="hlt">Al</span>. The important issue is whether the bulk solar inventory of 26<span class="hlt">Al</span>/27<span class="hlt">Al</span> was approximately 5 × 10-5 at some point in the early solar system. We discuss ultra refractory phases of solar type oxygen isotope composition with 26<span class="hlt">Al</span>/27<span class="hlt">Al</span> from approximately 5 × 10-5 to below 0.2 × 10-5. We argue that the real issues are: intrinsic heterogeneity in the parent cloud; mechanism and timing for the later production of 16O-poor material; and the relationship to earlier formed 16O-rich material in the disk. 26<span class="hlt">Al</span>-free refractories can be produced at a later time by late infall, if there is an adequate heat source, or from original heterogeneities in the placental molecular cloud from which the solar system formed.</p> <div class="credits"> <p class="dwt_author">Wasserburg, G. J.; Wimpenny, Josh; Yin, Qing-Zhu</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">204</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2014ApPhA.tmp..246S"> <span id="translatedtitle">Plasmonics properties of trimetallic <span class="hlt">Al@Al</span>2O3@Ag@Au and <span class="hlt">Al@Al</span>2O3@AuAg nanostructures</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Bimetallic and trimetallic nanoparticles have attracted significant attention in recent times due to their enhanced electrochemical and catalytic properties compared to monometallic nanoparticles. The numerical calculations using Mie theory has been carried out for three-layered metal nanoshell dielectric-metal-metal (DMM) system consisting of a particle with a dielectric core (<span class="hlt">Al@Al</span>2O3), a middle metal Ag (Au) layer and an outer metal Au (Ag) shell. The results have been interpreted using plasmon hybridization theory. We have also prepared <span class="hlt">Al@Al</span>2O3@Ag@Au and <span class="hlt">Al@Al</span>2O3@AgAu triple-layered core-shell or alloy nanostructure by two-step laser ablation method and compared with calculated results. The synthesis involves temporal separations of <span class="hlt">Al</span>, Ag, and Au deposition for step-by-step formation of triple-layered core-shell structure. To form <span class="hlt">Al</span>@Ag nanoparticles, we ablated silver for 40 min in aluminium nanoparticle colloidal solution. As aluminium oxidizes easily in water to form alumina, the resulting structure is core-shell <span class="hlt">Al@Al</span>2O3. The <span class="hlt">Al@Al</span>2O3 particle acts as a seed for the incoming energetic silver particles for multilayered <span class="hlt">Al@Al</span>2O3@Ag nanoparticles is formed. The silver target was then replaced by gold target and ablation was carried out for different ablation time using different laser energy for generation of <span class="hlt">Al@Al</span>2O3@Ag@Au core-shell or <span class="hlt">Al@Al</span>2O3@AgAu alloy. The formation of core-shell and alloy nanostructure was confirmed by UV-visible spectroscopy. The absorption spectra show shift in plasmon resonance peak of silver to gold in the range 400-520 nm with increasing ablation time suggesting formation of Ag-Au alloy in the presence of alumina particles in the solution.</p> <div class="credits"> <p class="dwt_author">Singh, Rina; Soni, R. K.</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-05-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">205</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/14645389"> <span id="translatedtitle">Form of <span class="hlt">Al</span> changes with <span class="hlt">Al</span> concentration in leaves of buckwheat.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Buckwheat (Fagopyrum esculentum Moench. cv. Jianxi) is known as an <span class="hlt">Al</span>-accumulating plant. The process leading to the accumulation of <span class="hlt">Al</span> in the leaves was investigated, focusing on the chemical form of <span class="hlt">Al</span> using 27<span class="hlt">Al</span>-nuclear magnetic resonance. Leaves with different <span class="hlt">Al</span> concentrations were prepared by growing buckwheat on a very acidic soil (Andosol) amended with or without CaCO3 (1 or 3 g x kg-1 soil). When the <span class="hlt">Al</span> concentration of the leaves was lower, only one major signal was observed at a chemical shift of 16.1 ppm, which was assigned to an <span class="hlt">Al</span>-oxalate complex at a 1:3 ratio. However, when the <span class="hlt">Al</span> concentration of the leaves increased to a high level (e.g. 12 g <span class="hlt">Al</span> kg-1), an additional signal at a chemical shift of 11.2 ppm was observed. This signal was assigned to an <span class="hlt">Al</span>-citrate complex at a 1:1 ratio. In the leaf with a high <span class="hlt">Al</span> concentration, both <span class="hlt">Al</span>-oxalate (1:3) and <span class="hlt">Al</span>-citrate (1:1) were detected in marginal and middle parts, while only <span class="hlt">Al</span>-oxalate was detected in the basal part. The oxalate concentration did not differ very much between leaves with low and high <span class="hlt">Al</span> concentrations at the same position, while citrate concentration significantly increased with increasing <span class="hlt">Al</span> concentration when the oxalate/<span class="hlt">Al</span> ratio became lower than 3.0. As the <span class="hlt">Al</span>-citrate complex has been demonstrated to be the form of transport in the xylem, the results suggest that when internal oxalate is enough to form a complex with <span class="hlt">Al</span> at a 3:1 ratio in the leaves with a low <span class="hlt">Al</span> concentration, <span class="hlt">Al</span>-citrate converts to <span class="hlt">Al</span>-oxalate. However, this conversion does not occur in the leaves with a very high <span class="hlt">Al</span> concentration, resulting in the coexistence of both <span class="hlt">Al</span>-oxalate and <span class="hlt">Al</span>-citrate complexes. PMID:14645389</p> <div class="credits"> <p class="dwt_author">Shen, Renfang; Iwashita, Takashi; Ma, Jian Feng</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">206</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/21608136"> <span id="translatedtitle">Synthesis of <span class="hlt">AlN/Al</span> Polycrystals along with <span class="hlt">Al</span> Nanoparticles Using Thermal Plasma Route</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">This paper for the first time reports the (200) oriented growth of hexagonal Aluminum nitride crystals during synthesis of aluminum nanoparticles in dc transferred arc thermal plasma reactor by gas phase condensation in nitrogen plasma. The structural and morphological study of as synthesized <span class="hlt">Al</span>N crystal and aluminium nanoparticles was done by using the x-ray diffraction method, scanning electron microscopy and transmission electron microscopy.</p> <div class="credits"> <p class="dwt_author">Kanhe, Nilesh S.; Nawale, A. B.; Kulkarni, N. V.; Bhoraskar, S. V.; Mathe, V. L. [Department of Physics, University of Pune, Pune 411007 (India); Das, A. K. [Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085 (India)</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-07-15</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">207</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19940032245&hterms=powder+metallography&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3Dpowder%2Bmetallography"> <span id="translatedtitle">Ni<span class="hlt">Al</span>-base composite containing high volume fraction of <span class="hlt">Al</span>N for advanced engines</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">A particulate reinforced Ni<span class="hlt">Al-Al</span>N composite alloy has a Ni<span class="hlt">Al</span> matrix and greater than about 13 volume percent fine particles of <span class="hlt">Al</span>N within the matrix. The particles preferably have a diameter from about 15 nanometers to about 50 nanometers. The particulate reinforced Ni<span class="hlt">Al-Al</span>N composite alloy may be prepared by cryomilling prealloyed Ni<span class="hlt">Al</span> in liquid nitrogen using grinding media having a diameter of from about 2 to 6 mm at an impeller speed of from about 450 RPM to about 800 RPM. The cryomilling may be done for a duration of from about 4 hours to about 20 hours to obtain a cryomilled powder. The cryomilled powder may be consolidated to form the particulate reinforced Ni<span class="hlt">Al-Al</span>N composite alloy. The particulate reinforced alloy can further include a toughening alloy. The toughening alloy may include NiCr<span class="hlt">Al</span>Y, FeCr<span class="hlt">Al</span>Y, and Fe<span class="hlt">Al</span>.</p> <div class="credits"> <p class="dwt_author">Hebsur, Mohan (inventor); Whittenbeger, John D. (inventor); Lowell, Carl F. (inventor)</p> <p class="dwt_publisher"></p> <p class="publishDate">1994-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">208</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/49428031"> <span id="translatedtitle">Evolution of deformation texture in <span class="hlt">Al\\/Al–Mg\\/Al</span> composite sheets during cold-roll cladding</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary"><span class="hlt">Al\\/Al–Mg\\/Al</span> composite sheets were fabricated by roll cladding to investigate the evolution of deformation texture through the thickness direction. Electron backscatter diffraction (EBSD) was used to analyze the heterogeneity of deformation texture in each component layer of the composite sheets. Finite element analysis (FEA) was conducted to simulate the deformation history in each component layer during roll cladding. The deformation</p> <div class="credits"> <p class="dwt_author">Eun-Young Kim; JaeHyung Cho; Hyoung-Wook Kim; Shi-Hoon Choi</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">209</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40368817"> <span id="translatedtitle">Electrochemical behaviour and corrosion performance of Mg–Li–<span class="hlt">Al</span>–Zn anodes with high <span class="hlt">Al</span> composition</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">This study investigated the electrochemical and corrosion performance of Mg–Li–<span class="hlt">Al</span>–Zn anodes with <span class="hlt">Al</span> compositions of ?3 wt.% and ?9 wt.%. Mg–Li–<span class="hlt">Al</span>–Zn alloy with ?9 wt.% <span class="hlt">Al</span> had a relatively negative open-circuit potential and a high discharge voltage in MgCl2 electrolyte, owing to the distribution of numerous <span class="hlt">Al</span>Li particles in the matrix of the alloy. <span class="hlt">Al</span>Li particles were believed to transform</p> <div class="credits"> <p class="dwt_author">M. C. Lin; C. Y. Tsai; J. Y. Uan</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">210</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40940053"> <span id="translatedtitle">Microstructures and mechanical properties of Fe 3<span class="hlt">Al</span>-based Fe–<span class="hlt">Al</span>–C alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">In this paper results on the microstructures and mechanical properties of Fe3<span class="hlt">Al</span>-based Fe–<span class="hlt">Al</span>–C alloys with strengthening precipitates of the perovskite-type ?-phase Fe3<span class="hlt">Al</span>Cx are presented. The alloys are prepared by vacuum induction melting and cast into Cu-moulds. The composition of the Fe3<span class="hlt">Al</span> matrix of the investigated Fe–<span class="hlt">Al</span>–C alloys varies between 23 and 29at.% <span class="hlt">Al</span>. The ternary C-additions range from 1 to</p> <div class="credits"> <p class="dwt_author">A. Schneider; L. Falat; G. Sauthoff; G. Frommeyer</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">211</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/48342061"> <span id="translatedtitle">Werbung <span class="hlt">als</span> Verhaltensvorbild für Mitarbeiter</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">\\u000a Seit der Kampagne „FedEx. Whatever it takes.“ gilt das Logistikunternehmen FedEx <span class="hlt">als</span> Trendsetter in Sachen Werbung. Mit der\\u000a Kampagne ist es FedEx gelungen, seine tendenziell „farblose“ Dienstleistung emotional aufzuladen und für den Kunden greifbar\\u000a zu machen. Zudem konnte die Bekanntheit der Marke gesteigert werden. FedEx schaffte noch im Erscheinungsjahr der Kampagne\\u000a erstmals den Sprung in das Interbrand-Ranking der einhundert wertvollsten</p> <div class="credits"> <p class="dwt_author">Sven Henkel; Torsten Tomczak; Wolfgang Jenewein</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">212</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/49256081"> <span id="translatedtitle">The coarsening behavior of duplex <span class="hlt">Al</span> 2O 3\\/Ni<span class="hlt">Al</span> 2O 4 composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">In The Present Study, The Grain Growth Behavior Of <span class="hlt">Al</span>2O3\\/Nial2O4 Composite Is Compared With That Of <span class="hlt">Al</span>2O3 And Of Ni<span class="hlt">Al</span>2O4. Duplex <span class="hlt">Al</span>2O3\\/Ni<span class="hlt">Al</span>2O4 composite shows strong resistance to coarsening. The activation energy for the grain growth of monolithic <span class="hlt">Al</span>2O 3 is the same as that of <span class="hlt">Al</span>2O3 in composite. However, the activation energy for the grain growth of Ni<span class="hlt">Al</span>2O4 is changed</p> <div class="credits"> <p class="dwt_author">W. H. Tuan; M. C. Lin; W. H. Tzing</p> <p class="dwt_publisher"></p> <p class="publishDate">1997-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">213</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40987596"> <span id="translatedtitle">Growth stage kinetics in the synthesis of <span class="hlt">Al</span> 2O 3\\/<span class="hlt">Al</span> composites by directed oxidation of <span class="hlt">Al</span>-Mg and <span class="hlt">Al</span>-Mg-Si alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Although synthesis of ceramic matrix composites by the directed oxidation process offers significant advantages over traditional composite processing routes, the scientific basis for the process is not fully understood. This paper is addressed to understanding the mechanism of composite growth from <span class="hlt">Al</span>-Mg and <span class="hlt">Al</span>-Mg-Si alloys theoretically and experimentally. Analysis of the oxidation kinetics of <span class="hlt">Al</span>-Mg and <span class="hlt">Al</span>-Mg-Si alloys for various</p> <div class="credits"> <p class="dwt_author">H. Venugopalan; T. DebRoy</p> <p class="dwt_publisher"></p> <p class="publishDate">1996-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">214</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=DE94016877"> <span id="translatedtitle">Nonstoichiometry of <span class="hlt">Al</span>-Zr intermetallic phases.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">Nonstoichiometry of metastable cubic (beta)(prime) and equilibrium tetragonal (beta) <span class="hlt">Al</span>-Zr intermetallic phases of the nominal composition <span class="hlt">Al</span>(sub 3)Zr in <span class="hlt">Al</span>-rich alloys has been extensively studied. It is proposed that the ''dark contrast'' of (beta)(prim...</p> <div class="credits"> <p class="dwt_author">V. Radmilovic G. Thomas</p> <p class="dwt_publisher"></p> <p class="publishDate">1994-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">215</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/10174408"> <span id="translatedtitle">Nonstoichiometry of <span class="hlt">Al</span>-Zr intermetallic phases</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Nonstoichiometry of metastable cubic {beta}{prime} and equilibrium tetragonal {beta} <span class="hlt">Al</span>-Zr intermetallic phases of the nominal composition <span class="hlt">Al</span>{sub 3}Zr in <span class="hlt">Al</span>-rich alloys has been extensively studied. It is proposed that the ``dark contrast`` of {beta}{prime} core in {beta}{prime}/{sigma}{prime} complex precipitates, in <span class="hlt">Al</span>-Li-Zr based alloys, is caused by incorporation of <span class="hlt">Al</span> and Li atoms into the {beta}{prime} phase on Zr sublattice sites, forming nonstoichiometric <span class="hlt">Al</span>-Zr intermetallic phases, rather than by Li partitioning only. {beta}{prime} particles contain very small amounts of Zr, approximately 5 at.%, much less than the stoichiometric 25 at.% in the <span class="hlt">Al</span>{sub 3}Zr metastable phase. These particles are, according to simulation of high resolution images, of the <span class="hlt">Al</span>{sub 3}(<span class="hlt">Al</span>{sub 0.4}Li{sub 0.4}Zr{sub 0.2}) type. Nonstoichiometric particles of average composition <span class="hlt">Al</span>{sub 4}Zr and <span class="hlt">Al</span>{sub 6}Zr are observed also in the binary <span class="hlt">Al</span>-Zr alloy, even after annealing for several hours at 600{degree}C.</p> <div class="credits"> <p class="dwt_author">Radmilovic, V.; Thomas, G.</p> <p class="dwt_publisher"></p> <p class="publishDate">1994-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">216</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=DE99002885"> <span id="translatedtitle">U-<span class="hlt">Al</span> alloy charge makeup equation.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">The (sup 235)U content in fuel tubes (g(sup 235)U/ft) is directly proportional to the (sup 235)U concentration (g(sup 235)U/cc) in the U-<span class="hlt">Al</span> core alloy. In order to prepare enriched uranium metal, aluminum, and U-<span class="hlt">Al</span> scrap for U-<span class="hlt">Al</span> production melts, the ove...</p> <div class="credits"> <p class="dwt_author">F. C. Rhode</p> <p class="dwt_publisher"></p> <p class="publishDate">1988-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">217</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/53919357"> <span id="translatedtitle"><span class="hlt">Al</span>-Cr-Nb (Aluminium - Chromium - Niobium)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">This document is part of Subvolume A1 'Light Metal Systems. Part 1: Selected Systems from Ag-<span class="hlt">Al</span>-Cu to <span class="hlt">Al</span>-Cu-Er' of Volume 11 'Ternary Alloy Systems - Phase Diagrams, Crystallographic and Thermodynamic Data critically evaluated by MSIT®' of Landolt-Börnstein - Group IV Physical Chemistry. It provides the data for the ternary system <span class="hlt">Al</span>-Cr-Nb (Aluminium - Chromium - Niobium).</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">218</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2010JCrGr.312.2569K"> <span id="translatedtitle">Possibility of <span class="hlt">Al</span>N growth using Li-<span class="hlt">Al</span>-N solvent</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The possibility of <span class="hlt">Al</span>N growth using Li-<span class="hlt">Al</span>-N solvent was investigated. Based on theoretical prediction, we selected Li 3N as a suitable nitrogen source for <span class="hlt">Al</span>N growth. First, vapor phase epitaxy using Li 3N and <span class="hlt">Al</span> as source materials was performed to confirm the following reaction on the growth surface: Li 3N+<span class="hlt">Al=Al</span>N+3Li. The results suggest that the reaction proceeds to form <span class="hlt">Al</span>N on the substrate under appropriate conditions. Next, <span class="hlt">Al</span>N growth using Li-<span class="hlt">Al</span>-N solvent was carried out. The Li-<span class="hlt">Al</span>-N solvent was prepared by annealing of mixtures composed of Li 3N and <span class="hlt">Al</span>. The results imply that <span class="hlt">Al</span>N was formed under an <span class="hlt">Al</span>-rich condition. Moreover, it was found that Li was swept out from <span class="hlt">Al</span>N grains during growth. The results suggest that <span class="hlt">Al</span>N growth using Li-<span class="hlt">Al</span>-N solvent might be a key technology to obtain an <span class="hlt">Al</span>N crystal boule.</p> <div class="credits"> <p class="dwt_author">Kangawa, Yoshihiro; Kakimoto, Koichi</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-09-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">219</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/20005991"> <span id="translatedtitle">Wear behavior of <span class="hlt">Al-Al</span>{sub 3}Ti composite manufactured by a centrifugal method</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">The purpose of the present study was to develop a wear-resistant, light <span class="hlt">Al-Al</span>{sub 3}Ti composite material. An <span class="hlt">Al-Al</span>{sub 3}Ti composite specimen was machined from a thick-walled tube of <span class="hlt">Al-Al</span>{sub 3}Ti functionally graded material (FGM) manufactured by the centrifugal method from a commercial ingot of <span class="hlt">Al</span>-5 mass% Ti master alloy. The alloy was heated to a temperature where solid <span class="hlt">Al</span>{sub 3}Ti particles resided in a liquid <span class="hlt">Al</span> matrix, and then the centrifugal method was carried out. <span class="hlt">Al</span>{sub 3}Ti particles in a commercial alloy ingot exist as platelets, and this shape was maintained through the casting. Three kinds of wear specimens were prepared, taking into account the morphology of the <span class="hlt">Al</span>{sub 3}Ti particles in the thick-walled FGM tube; the <span class="hlt">Al</span>{sub 3}Ti particles were arranged with their platelet planes nearly normal to the radial direction as a result of the applied centrifugal force. The wear resistance of the <span class="hlt">Al-Al</span>{sub 3}Ti composite was significantly higher than that of pure <span class="hlt">Al</span>. Wear-resistance anisotropy and dissolution of the <span class="hlt">Al</span>{sub 3}Ti into the <span class="hlt">Al</span> matrix at the near-surface region, around 100 {micro}m in depth, were also observed. The mechanism of the supersaturated-layer formation and the origin of the anisotropic wear resistance are discussed.</p> <div class="credits"> <p class="dwt_author">Watanabe, Yoshimi; Yamanaka, Noboru; Fukui, Yasuyoshi</p> <p class="dwt_publisher"></p> <p class="publishDate">1999-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">220</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013JSSCh.198..330R"> <span id="translatedtitle">Aluminium distribution in ZSM-5 revisited: The role of <span class="hlt">Al-Al</span> interactions</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">We present a theoretical study of the distribution of <span class="hlt">Al</span> atoms in zeolite ZSM-5 with Si/<span class="hlt">Al</span>=47, where we focus on the role of <span class="hlt">Al-Al</span> interactions rather than on the energetics of <span class="hlt">Al</span>/Si substitutions at individual sites. Using interatomic potential methods, we evaluate the energies of the full set of symmetrically independent configurations of <span class="hlt">Al</span> siting in a Si94<span class="hlt">Al</span>2O192 cell. The equilibrium <span class="hlt">Al</span> distribution is determined by the interplay of two factors: the energetics of the <span class="hlt">Al</span>/Si substitution at an individual site, which tends to populate particular T sites (e.g., the T14 site), and the <span class="hlt">Al-Al</span> interaction, which at this Si/<span class="hlt">Al</span> maximises <span class="hlt">Al-Al</span> distances in general agreement with Dempsey's rule. However, it is found that the interaction energy changes approximately as the inverse of the square of the distance between the two <span class="hlt">Al</span> atoms, rather than the inverse of the distance expected if this were merely charge repulsion. Moreover, we find that the anisotropic nature of the framework density plays an important role in determining the magnitude of the interactions, which are not simply dependent on <span class="hlt">Al-Al</span> distances.</p> <div class="credits"> <p class="dwt_author">Ruiz-Salvador, A. Rabdel; Grau-Crespo, Ricardo; Gray, Aileen E.; Lewis, Dewi W.</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-02-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_10");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' 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src="http://www.science.gov/scigov/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">221</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=PIA07216&hterms=Arabic+Arabic+al-+arab+yah&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DArabic%2B%257C%2B%25D8%25A7%25D9%2584%25D8%25B9%25D8%25B1%25D8%25A8%25D9%258A%25D8%25A9%2B%257C%2Bal-%25CA%25BBarab%25C4%25AByah%2B%257C%2B%25D8%25B9%25D8%25B1%25D8%25A8%25D9%258A%252F%2526"> <span id="translatedtitle">Opportunity's 'Rub <span class="hlt">al</span> Khali' Panorama</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary"><p/> [figure removed for brevity, see original site] Click on the image for Opportunity's 'Rub <span class="hlt">al</span> Khali' Panorama (QTVR) <p/> This panoramic image, dubbed 'Rub <span class="hlt">al</span> Khali,' was acquired by NASA's Mars Exploration Rover Opportunity on the plains of Meridiani during the period from the rover's 456th to 464th sols on Mars (May 6 to May 14, 2005). Opportunity was about 2 kilometers (1.2 miles) south of 'Endurance Crater' at a place known informally as 'Purgatory Dune.' <p/> The rover was stuck in the dune's deep fine sand for more than a month. 'Rub <span class="hlt">al</span> Khali' (Arabic translation: 'the empty quarter') was chosen as the name for this panorama because it is the name of a similarly barren, desolate part of the Saudi Arabian desert on Earth. <p/> The view spans 360 degrees. It consists of images obtained in 97 individual pointings of the panoramic camera. The camera took images with five camera filters at each pointing. This 22,780-by-6,000-pixel mosaic is an approximately true-color rendering generated using the images acquired through filters admitting light wavelengths of 750, 530, and 480 nanometers. <p/> Lighting varied during the nine sols it took to acquire this panorama, resulting in some small image seams within the mosaic. These seams have been smoothed in sky parts of the mosaic to better simulate the vista that a person would see if able to view it all at the same time on Mars. <p/> Opportunity's tracks leading back to the north (center of the panorama) are a reminder of the rover's long trek from Endurance Crater. The deep ruts dug by Opportunity's wheels as it became stuck in the sand appear in the foreground. The crest and trough of the last ripple the rover crossed before getting stuck is visible in the center. These wind-formed sand features are only about 10 to 15 centimeters (4 to 6 inches) tall. The crest of the actual ripple where the rover got stuck can be seen just to the right of center. The tracks and a few other places on and near ripple crests can be seen in this color image to be dustier than the undisturbed or 'normal' plains soils in Meridiani. Since the time these ruts were made, some of the dust there has been blown away by the wind, reaffirming the dynamic nature of the martian environment, even in this barren, ocean-like desert of sand.</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">222</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2009bein.book...29D"> <span id="translatedtitle">Instandhaltungsmanagement <span class="hlt">als</span> Gestaltungsfeld Ganzheitlicher Produktionssysteme</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Sich kontinuierlich verändernde Rahmenbedingungen, wie beispielsweise eine steigende Variantenvielfalt, verkürzte Produktlebenszyklen sowie Kundenforderungen nach höherer Qualität, kürzeren Lieferzeiten und geringeren Kosten, fordern von produzierenden Unternehmen eine stetige Anpassung der Prozesse, der Organisation und der Strukturen. Seit den 90er Jahren versuchen immer mehr deutsche Unternehmen diesen veränderten Anforderungen mit der Einführung eines Ganzheitlichen Produktionssystems (GPS) zu begegnen. Ganzheitliche Produktionssysteme sind dabei in ihren Grundlagen an das Toyota Produktionssystem angelehnt, vereinigen aber auch weitere Methoden zu einem unternehmensspezifischen Regelwerk. Im Rahmen des langfristigen Trends zu unternehmensindividuellen Produktionssystemen wird sowohl in der Industrie <span class="hlt">als</span> auch in der Forschung intensiv über das Toyota Produktionssystem, Lean Production, Lean Management und Ganzheitliche Produktionssysteme diskutiert, werden Konzepte zu Implementierung und Betrieb erstellt und die Wirtschaftlichkeit untersucht.</p> <div class="credits"> <p class="dwt_author">Dombrowski, Uwe; Schulze, Sven; Otano, Isabel Crespo</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">223</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/282257"> <span id="translatedtitle">Microstructure and properties of <span class="hlt">Al</span>{sub 2}O{sub 3}-<span class="hlt">Al</span>(Si) and <span class="hlt">Al</span>{sub 2}O{sub 3}-<span class="hlt">Al</span>(Si)-Si composites formed by in situ reaction of <span class="hlt">Al</span> with aluminosilicate ceramics</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary"><span class="hlt">Al</span>{sub 2}O{sub 3}-<span class="hlt">Al</span>(Si) and <span class="hlt">Al</span>{sub 2}O{sub 3}-<span class="hlt">Al</span>(Si)-Si composites have been formed by in situ reaction of molten <span class="hlt">Al</span> with aluminosilicate ceramics. This reactive metal penetration (RMP) process is driven by a strongly negative Gibbs energy for reaction. In the <span class="hlt">Al</span>/mullite system, <span class="hlt">Al</span> reduces mullite to produce {alpha}-<span class="hlt">Al</span>{sub 2}O{sub 3} and elemental Si. With excess <span class="hlt">Al</span> (i.e., x > 0), a composite of {alpha}-<span class="hlt">Al</span>{sub 2}O{sub 3}, <span class="hlt">Al</span>(Si) alloy, and Si can be formed. Ceramic-metal composites containing up to 30 vol pct <span class="hlt">Al</span>(Si) were prepared by reacting molten <span class="hlt">Al</span> with dense, aluminosilicate ceramic preforms or by reactively hot pressing <span class="hlt">Al</span> and mullite powder mixtures. Both reactive metal-forming techniques produce ceramic composite bodies consisting of a fine-grained alumina skeleton with an interpenetrating <span class="hlt">Al</span>(Si) metal phase. The rigid alumina ceramic skeletal structure dominates composite physical properties such as the Young`s modulus, hardness, and the coefficient of thermal expansion, while the interpenetrating ductile <span class="hlt">Al</span>(Si) metal phase contributes to composite fracture toughness. Microstructural analysis of composite fracture surfaces shows evidence of ductile metal failure of <span class="hlt">Al</span>(Si) ligaments. <span class="hlt">Al</span>{sub 2}O{sub 3}-<span class="hlt">Al</span>(Si) and <span class="hlt">Al</span>{sub 2}O{sub 3}-<span class="hlt">Al</span>(Si)-Si composites produced by in situ reaction of aluminum with mullite have improved mechanical properties and increased stiffness relative to dense mullite, and composite fracture toughness increases with increasing <span class="hlt">Al</span>(Si) content.</p> <div class="credits"> <p class="dwt_author">Ewsuk, K.G.; Glass, S.J.; Loehman, R.E. [Sandia National Labs., Albuquerque, NM (United States); Tomsia, A.P. [Lawrence Berkeley Lab., CA (United States); Fahrenholtz, W.G. [Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Chemical and Nuclear Engineering</p> <p class="dwt_publisher"></p> <p class="publishDate">1996-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">224</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2014PhyC..503...29K"> <span id="translatedtitle">Measurements of tunneling barrier thicknesses for Nb/<span class="hlt">Al-Al</span>Ox/Nb tunnel junctions</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The tunnel barrier thicknesses of Nb/<span class="hlt">Al-Al</span>Ox/Nb tunnel junctions were measured using transmission electron microscopy (TEM) and X-ray Reflection (XRR). By investigating the barrier thickness dependence of current density Jc, the barrier height for Nb/<span class="hlt">Al-Al</span>Ox/Nb junctions was calculated. Nb/<span class="hlt">Al-Al</span>Ox/Nb junctions with different Jc were fabricated by controlling the O2 exposure in <span class="hlt">Al</span> oxidation. The junctions show good tunneling properties with subgap leakage factor Vm larger than 30 mV in the range of Jc from tens of A/cm2 to several kA/cm2. TEM images showed clear interface and indicated the <span class="hlt">Al</span>Ox thicknesses ranging from 0.8 nm to 1.9 nm, and the average barrier height was estimated to be 0.17 eV for Nb/<span class="hlt">Al-Al</span>Ox/Nb tunnel junctions.</p> <div class="credits"> <p class="dwt_author">Kang, Xinjie; Ying, Liliang; Wang, Hai; Zhang, Guofeng; Peng, Wei; Kong, Xiangyan; Xie, Xiaoming; Wang, Zhen</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-08-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">225</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40267405"> <span id="translatedtitle">Radioscopic visualization of melting, alloying and solidification of pure <span class="hlt">Al</span> and <span class="hlt">Al</span>–Cu</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Horizontal directional solidification (HDS) and horizontal directional melting (HDM) of pure <span class="hlt">Al</span> and <span class="hlt">Al</span>–4.5%wt Cu alloy were studied in real-time with in situ X-ray radioscopic visualization technology. Cu into pure <span class="hlt">Al</span> and the stratification and mixing of Cu in <span class="hlt">Al</span>–Cu alloy melt were monitored. Some characteristics of the dynamics of the solid–liquid interface profile during HDS of a rectangular <span class="hlt">Al</span></p> <div class="credits"> <p class="dwt_author">Hongbin Yin; Jean N Koster</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">226</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/23151625"> <span id="translatedtitle">Single crystal growth and characterization of binary stoichiometric and <span class="hlt">Al</span>-rich Ni 3<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Binary stoichiometric Ni3<span class="hlt">Al</span> (Ni–25at% <span class="hlt">Al</span>) single crystals and <span class="hlt">Al</span>-rich single-crystal-like (Ni–26at% <span class="hlt">Al</span>, Ni–27at% <span class="hlt">Al</span>) alloys that do not contain any ternary additions have been successfully grown for the first time, by using the floating zone method. The quality of the crystals was examined by the Laue X-ray back-reflection method and optical microscopy. The stoichiometric single crystals had good crystallinity. The</p> <div class="credits"> <p class="dwt_author">D. Golberg; M Demura; T Hirano</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">227</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/l56w3417k43225l2.pdf"> <span id="translatedtitle">Microstructures and corrosion properties of casting in situ <span class="hlt">Al</span> 3 Ti-<span class="hlt">Al</span> composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The effects of Ti content and the alloying elements of Si and Cu on the microstructures of casting in situ <span class="hlt">Al</span>3Ti-<span class="hlt">Al</span> composites were investigated. Simultaneously, their corrosion properties were also discussed. The results indicate that\\u000a the aspect ratios of <span class="hlt">Al</span>3Ti platelets in different <span class="hlt">Al</span> based composites are different although all of them are in flaky shape. The morphologies of <span class="hlt">Al</span>3Ti</p> <div class="credits"> <p class="dwt_author">Tijun Chen; Jian Li; Yuan Hao</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">228</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://jxb.oxfordjournals.org/cgi/reprint/55/394/131.pdf"> <span id="translatedtitle">Form of <span class="hlt">Al</span> changes with <span class="hlt">Al</span> concentration in leaves of buckwheat</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Buckwheat (Fagopyrum esculentum Moench. cv. Jianxi) is known as an <span class="hlt">Al</span>-accumulating plant. The process leading to the accumulation of <span class="hlt">Al</span> in the leaves was investigated, focusing on the chemical form of <span class="hlt">Al</span> using 27<span class="hlt">Al</span>-nuclear magnetic resonance. Leaves with different <span class="hlt">Al</span> concentrations were pre- pared by growing buckwheat on a very acidic soil (Andosol) amended with or without CaCO3 (1 or</p> <div class="credits"> <p class="dwt_author">Renfang Shen; Takashi Iwashita; Jian Feng M</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">229</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2014ApSS..292..620C"> <span id="translatedtitle">Influences of <span class="hlt">Al</span> particles on the microstructure and property of electrodeposited Ni-<span class="hlt">Al</span> composite coatings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Ni-<span class="hlt">Al</span> composite coatings with different contents of <span class="hlt">Al</span> microparticles were prepared from a conventional Watt bath. The influences of <span class="hlt">Al</span> particle loadings in the bath on the surface morphology, composition, texture, grain size, microstrain, residual stress and anti-corrosion of the Ni-<span class="hlt">Al</span> composite coating were investigated. The friction coefficients of the coatings at 200 °C were also evaluated by a pin-on-disctribometer. The results showed that the surface morphology of the coatings changed from pyramid + colonied structure to colonied structure with increasing <span class="hlt">Al</span> particle loadings. The (2 0 0) preferred orientation for pure Ni coating evolved to random orientation with increasing <span class="hlt">Al</span> particle loadings. The grain size obtained the minimum value of 72.28 nm at <span class="hlt">Al</span> particle loading of 100 g/L and the microstrain of the coating increased with increasing the <span class="hlt">Al</span> particle loadings. The incorporation of <span class="hlt">Al</span> particles decreased the residual stress of the electro-deposited coating and all the coatings deposited at different <span class="hlt">Al</span> particle loadings possessed low residual stress. As the <span class="hlt">Al</span> particle loading increased, the anti-corrosion of the Ni-<span class="hlt">Al</span> coatings increased owing to the combined effect of increasing <span class="hlt">Al</span> content in the coatings and the texture evolution from (2 0 0) plane to (1 1 1) plane. The wear result suggested that the increasing <span class="hlt">Al</span> particle content did not improve the wear performance of the Ni-<span class="hlt">Al</span> composite coatings.</p> <div class="credits"> <p class="dwt_author">Cai, Fei; Jiang, Chuanhai</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">230</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/49425063"> <span id="translatedtitle">Guinier-Preston zones in <span class="hlt">Al</span>-rich <span class="hlt">Al</span>?Cu and <span class="hlt">Al</span>?Ag single crystals</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Guinier-Preston zones in <span class="hlt">Al</span>?Ag and <span class="hlt">Al</span>?Cu were investigated by diffuse X-ray and neutron scattering. In <span class="hlt">Al</span>-3 at % Ag no differences are found between zones formed above and below 500 K (?- and ?-zones, respectively). Their average Ag concentration is (80 ± 10) at %, and the Ag concentration decreases by 10–15% from shell to core of the zones. In</p> <div class="credits"> <p class="dwt_author">Bernd Schönfeld; Alexander Malik; Gernot Kostorz; Willy Bührer; Jan Skov Pedersen</p> <p class="dwt_publisher"></p> <p class="publishDate">1997-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">231</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/l73323j3274033m2.pdf"> <span id="translatedtitle">Formation of <span class="hlt">Al</span> 2 O 3 \\/<span class="hlt">Al</span> Composites by Directed Melt Oxidation of <span class="hlt">Al</span>-Si-Zn Alloy</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Observations are presented on the initiation and growth of <span class="hlt">Al</span>2O3\\/<span class="hlt">Al</span> composites by the directed melt oxidation of <span class="hlt">Al</span>-Si alloys containing metallic Zn or using external dopant ZnO. Thermal\\u000a gravimetric analysis, optical microscopy, and x-ray diffraction analysis were employed to characterize the progress of oxidation\\u000a and the nature of oxidation products. Both Zn and ZnO dopants were able to initiate the</p> <div class="credits"> <p class="dwt_author">Jingzhong Zhao; Huiping Chai; Fajian Zhang</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">232</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24726768"> <span id="translatedtitle">Analysis of smoking and LPO in <span class="hlt">ALS</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Smoking has been suggested as one of the risk factor for amyotrophic lateral sclerosis (<span class="hlt">ALS</span>) development. In order to investigate whether adverse effects of cigarette smoke in <span class="hlt">ALS</span> have any association with increase in oxidative stress, disease severity, lipid hydroperoxides (LPO) and superoxide dismutase-1 (SOD1) levels were measured in biofluids of smoker and never smoker <span class="hlt">ALS</span> patients and clinically correlated. Serum and CSF from sporadic <span class="hlt">ALS</span> patients (n=50) diagnosed with El Escorial criteria were collected in the study. Serum (n=50) and CSF (n=42) were also collected from normal healthy controls. The LPO levels were estimated using commercially available kits. Enzyme-linked immunosorbent assays (ELISAs) were used to quantitate SOD1. Their levels were further analyzed among smoker and never smoker subjects. Significantly elevated LPO in sera and CSF of <span class="hlt">ALS</span> patients were observed (p<0.05). There was considerably increased LPO in sera and CSF of smoker <span class="hlt">ALS</span> subjects matched with disease severity as compared to never smoker <span class="hlt">ALS</span> (p<0.05). <span class="hlt">ALS</span> group did not show any alteration in SOD1 when compared to controls (p>0.05). In addition, no change has been observed in SOD1 levels in <span class="hlt">ALS</span> subjects who smoke (p>0.05). Increased LPO and unaltered SOD1 in <span class="hlt">ALS</span> patients may suggest the neuro-pathological association of LPO with <span class="hlt">ALS</span> disease independent of SOD1. With current findings, it may be proposed that LPO levels might constitute as probable biomarker for smoker <span class="hlt">ALS</span> patients, however, it cannot be concluded without larger gender matched studies. Additional investigations are needed to determine whether LPO upregulation is primary or secondary to motor neuron degeneration in <span class="hlt">ALS</span>. PMID:24726768</p> <div class="credits"> <p class="dwt_author">Anand, Akshay; Gupta, Pawan K; Prabhakar, Sudesh; Sharma, Suresh; Thakur, Keshav</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-05-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">233</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/1997PhyB..234..983S"> <span id="translatedtitle">Guinier-Preston zones in <span class="hlt">Al</span>-rich <span class="hlt">Al</span>?Cu and <span class="hlt">Al</span>?Ag single crystals</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Guinier-Preston zones in <span class="hlt">Al</span>?Ag and <span class="hlt">Al</span>?Cu were investigated by diffuse X-ray and neutron scattering. In <span class="hlt">Al</span>-3 at % Ag no differences are found between zones formed above and below 500 K (?- and ?-zones, respectively). Their average Ag concentration is (80 ± 10) at %, and the Ag concentration decreases by 10-15% from shell to core of the zones. In <span class="hlt">Al</span>-1.75 at % Cu, Guinier-Preston I zones are dominantly monolayers with a Cu fraction of (84 ± 2) at %.</p> <div class="credits"> <p class="dwt_author">Schönfeld, Bernd; Malik, Alexander; Kostorz, Gernot; Bührer, Willy; Skov Pedersen, Jan</p> <p class="dwt_publisher"></p> <p class="publishDate">1997-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">234</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/18583010"> <span id="translatedtitle">Oxidation of Ni<span class="hlt">Al\\/Al</span> 2O 3 composites for controlled development of surface layers and toughening</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The oxidation of Ni<span class="hlt">Al\\/Al</span>2O3 composites has been performed to develop protective layers with compressive stress for toughening. The dominant formation of Ni<span class="hlt">Al</span>2O4 is observed for Ni<span class="hlt">Al\\/Al</span>2O3 composites contrary to the consecutive formation of Ni3<span class="hlt">Al+Al</span>2O3, 2Ni+<span class="hlt">Al</span>2O3, 2NiO+<span class="hlt">Al</span>2O3, and NiO+Ni<span class="hlt">Al</span>2O4 for Ni<span class="hlt">Al</span> powder. The NiO formed on the composites immediately diffuses along with the grain boundary, reacts with boundary <span class="hlt">Al</span>2O3, and provides</p> <div class="credits"> <p class="dwt_author">Osami Abe; Yoshitaka Ohwa</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">235</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=158226"> <span id="translatedtitle">Internal Detoxification Mechanism of <span class="hlt">Al</span> in Hydrangea (Identification of <span class="hlt">Al</span> Form in the Leaves).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p class="result-summary">An internal detoxification mechanism for <span class="hlt">Al</span> was investigated in an <span class="hlt">Al</span>-accumulating plant, hydrangea (Hydrangea macrophylla), focusing on <span class="hlt">Al</span> forms present in the cells. The leaves of hydrangea contained as much as 15.7 mmol <span class="hlt">Al</span> kg-1 fresh weight, and more than two-thirds of the <span class="hlt">Al</span> was found in the cell sap. Using 27<span class="hlt">Al</span>- nuclear magnetic resonance, the dominant peak of <span class="hlt">Al</span> was observed at a chemical shift of 11 to 12 parts per million in both intact leaves and the extracted cell sap, which is in good accordance with the chemical shift for the 1:1 <span class="hlt">Al</span>-citrate complex. Purification of cell sap by molecular sieve chromatography (Sephadex G-10) combined with ion-exclusion chromatography indicated that <span class="hlt">Al</span> in fractions with the same retention time as citric acid contributed to the observed 27<span class="hlt">Al</span> peak in the intact leaves. The molar ratio of <span class="hlt">Al</span> to citric acid in the crude and purified cell sap approximated 1. The structure of the ligand chelated with <span class="hlt">Al</span> was identified to be citric acid. Bioassay experiments showed that the purified <span class="hlt">Al</span> complex from the cell sap did not inhibit root elongation of corn (Zea mays L.) and the viability of cells on the root tip surface was also not affected. These observations indicate that <span class="hlt">Al</span> is bound to citric acid in the cells of hydrangea leaves.</p> <div class="credits"> <p class="dwt_author">Ma, J. F.; Hiradate, S.; Nomoto, K.; Iwashita, T.; Matsumoto, H.</p> <p class="dwt_publisher"></p> <p class="publishDate">1997-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">236</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/12223659"> <span id="translatedtitle">Internal Detoxification Mechanism of <span class="hlt">Al</span> in Hydrangea (Identification of <span class="hlt">Al</span> Form in the Leaves).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">An internal detoxification mechanism for <span class="hlt">Al</span> was investigated in an <span class="hlt">Al</span>-accumulating plant, hydrangea (Hydrangea macrophylla), focusing on <span class="hlt">Al</span> forms present in the cells. The leaves of hydrangea contained as much as 15.7 mmol <span class="hlt">Al</span> kg-1 fresh weight, and more than two-thirds of the <span class="hlt">Al</span> was found in the cell sap. Using 27<span class="hlt">Al</span>- nuclear magnetic resonance, the dominant peak of <span class="hlt">Al</span> was observed at a chemical shift of 11 to 12 parts per million in both intact leaves and the extracted cell sap, which is in good accordance with the chemical shift for the 1:1 <span class="hlt">Al</span>-citrate complex. Purification of cell sap by molecular sieve chromatography (Sephadex G-10) combined with ion-exclusion chromatography indicated that <span class="hlt">Al</span> in fractions with the same retention time as citric acid contributed to the observed 27<span class="hlt">Al</span> peak in the intact leaves. The molar ratio of <span class="hlt">Al</span> to citric acid in the crude and purified cell sap approximated 1. The structure of the ligand chelated with <span class="hlt">Al</span> was identified to be citric acid. Bioassay experiments showed that the purified <span class="hlt">Al</span> complex from the cell sap did not inhibit root elongation of corn (Zea mays L.) and the viability of cells on the root tip surface was also not affected. These observations indicate that <span class="hlt">Al</span> is bound to citric acid in the cells of hydrangea leaves. PMID:12223659</p> <div class="credits"> <p class="dwt_author">Ma, J. F.; Hiradate, S.; Nomoto, K.; Iwashita, T.; Matsumoto, H.</p> <p class="dwt_publisher"></p> <p class="publishDate">1997-04-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">237</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/19916602"> <span id="translatedtitle">Reactivity of aluminum cluster anions with ammonia: selective etching of <span class="hlt">Al</span>11(-) and <span class="hlt">Al</span>12(-).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Reactivity of aluminum cluster anions toward ammonia was studied via mass spectrometry. Highly selective etching of <span class="hlt">Al</span>(11)(-) and <span class="hlt">Al</span>(12)(-) was observed at low concentrations of ammonia. However, at sufficiently high concentrations of ammonia, all other sizes of aluminum cluster anions, except for <span class="hlt">Al</span>(13)(-), were also observed to deplete. The disappearance of <span class="hlt">Al</span>(11)(-) and <span class="hlt">Al</span>(12)(-) was accompanied by concurrent production of <span class="hlt">Al</span>(11)NH(3)(-) and <span class="hlt">Al</span>(12)NH(3)(-) species, respectively. Theoretical simulations of the photoelectron spectrum of <span class="hlt">Al</span>(11)NH(3)(-) showed conclusively that its ammonia moiety is chemisorbed without dissociation, although in the case of <span class="hlt">Al</span>(12)NH(3)(-), dissociation of the ammonia moiety could not be excluded. Moreover, since differences in calculated <span class="hlt">Al</span>(n)(-) + NH(3) (n=9-12) reaction energies were not able to explain the observed selective etching of <span class="hlt">Al</span>(11)(-) and <span class="hlt">Al</span>(12)(-), we concluded that thermodynamics plays only a minor role in determining the observed reactivity pattern, and that kinetics is the more influential factor. In particular, the conversion from the physisorbed <span class="hlt">Al</span>(n)(-)(NH(3)) to chemisorbed <span class="hlt">Al</span>(n)NH(3)(-) species is proposed as the likely rate-limiting step. PMID:19916602</p> <div class="credits"> <p class="dwt_author">Grubisic, Andrej; Li, Xiang; Gantefoer, Gerd; Bowen, Kit H; Schnöckel, Hansgeorg; Tenorio, Francisco J; Martinez, Ana</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-11-14</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">238</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3201391"> <span id="translatedtitle">Calcium platinum aluminium, CaPt<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p class="result-summary">A preliminary X-ray study of CaPt<span class="hlt">Al</span> has been reported previously by Hulliger [J. Alloys Compd (1993), 196, 225–228] based on X-ray powder diffraction data without structure refinement. With the present single-crystal X-ray study, we confirm the assignment of the TiNiSi type for CaPt<span class="hlt">Al</span>, in a fully ordered inverse structure. All three atoms of the asymmetric unit have .m. site symmetry. The structure features a ? 3[<span class="hlt">Al</span>Pt] open framework with a fourfold coordination of Pt by <span class="hlt">Al</span> atoms and vice versa. The Ca atoms are located in the large channels of the structure.</p> <div class="credits"> <p class="dwt_author">Kenfack Tsobnang, Patrice; Fotio, Daniel; Ponou, Simeon; Fon Abi, Charles</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">239</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2014JMEP..tmp...91P"> <span id="translatedtitle">Interfacial Phenomena in <span class="hlt">Al/Al</span>, <span class="hlt">Al</span>/Cu, and Cu/Cu Joints Soldered Using an <span class="hlt">Al</span>-Zn Alloy with Ag or Cu Additions</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The studies of soldered joints were carried out in systems: <span class="hlt">Al/solder/Al</span>, <span class="hlt">Al</span>/solder/Cu, Cu/solder/Cu, where the solder was (<span class="hlt">Al</span>-Zn)EUT, (<span class="hlt">Al</span>-Zn)EUT with 0.5, 1.0, and 1.5 at.% of Ag and (<span class="hlt">Al</span>-Zn)EUT with 0.5, 1.0, and 1.5 at.% of Cu addition. Brazing was performed at 500 °C for 3 min. The EDS analysis indicated that the composition of the layers starting from the Cu pad was CuZn, Cu5Zn8, and CuZn4, respectively. Wetting tests were performed at 500 °C for 3, 8, 15, and 30 min, respectively. Thickness of the layers and their kinetics of growth were measured based on the SEM micrographs. The formation of interlayers was not observed from the side of <span class="hlt">Al</span> pads. On the contrary, dissolution of the <span class="hlt">Al</span> substrate and migration of <span class="hlt">Al</span>-rich particles into the bulk of the solder were observed.</p> <div class="credits"> <p class="dwt_author">Pstru?, Janusz; Gancarz, Tomasz</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-03-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">240</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2012APS..DNP.EA055O"> <span id="translatedtitle">Uncertainties in production of stellar 26<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">While most of ^26<span class="hlt">Al</span> content is believed to be produced in supernovae, as much as 20% may come from novae whose favorable energies enable the precise study of the production mechanism of ^26<span class="hlt">Al</span> in novae. This study achieves greater importance because ^26<span class="hlt">Al</span> is one of the critical isotopes that governs the path by which nucleosynthesis takes to heavier species and would also indirectly constrain the ^26<span class="hlt">Al</span> content produced by supernovae thereby impacting the ratio of stellar ^26<span class="hlt">Al</span>/^60Fe, an important benchmark in supernovae nucleosynthesis. Despite significant progress on the subject there remains large uncertainties in one of the competing ^26<span class="hlt">Al</span> production channels which relies on the ^25<span class="hlt">Al</span>(p,?)^26Si transition. This uncertainty is primarily characterized by the undetermined energy of the excited 3^+ ^26Si state which decays to the ground state of ^25<span class="hlt">Al</span>+p. To determine the resonance strength and energy of this transition an experiment is planned at the NSCL, which populates ^26Si through the beta decay of ^26P. Using an array of Ge clover detectors to measure the energies of the beta-delayed photons and their intensities, one could then determine ??, which then allows the calculation of the resonance strength (since ?p is known), completing the decay scheme of the ^25<span class="hlt">Al</span>(p,?)^26Si transition.</p> <div class="credits"> <p class="dwt_author">Ortez, Ronaldo; Wrede, Christopher; Bennet, Micheal; Santia, Marco; Bowe, Alice</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-10-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return 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onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_14");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">241</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2014JMEP...23.1614P"> <span id="translatedtitle">Interfacial Phenomena in <span class="hlt">Al/Al</span>, <span class="hlt">Al</span>/Cu, and Cu/Cu Joints Soldered Using an <span class="hlt">Al</span>-Zn Alloy with Ag or Cu Additions</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The studies of soldered joints were carried out in systems: <span class="hlt">Al/solder/Al</span>, <span class="hlt">Al</span>/solder/Cu, Cu/solder/Cu, where the solder was (<span class="hlt">Al</span>-Zn)EUT, (<span class="hlt">Al</span>-Zn)EUT with 0.5, 1.0, and 1.5 at.% of Ag and (<span class="hlt">Al</span>-Zn)EUT with 0.5, 1.0, and 1.5 at.% of Cu addition. Brazing was performed at 500 °C for 3 min. The EDS analysis indicated that the composition of the layers starting from the Cu pad was CuZn, Cu5Zn8, and CuZn4, respectively. Wetting tests were performed at 500 °C for 3, 8, 15, and 30 min, respectively. Thickness of the layers and their kinetics of growth were measured based on the SEM micrographs. The formation of interlayers was not observed from the side of <span class="hlt">Al</span> pads. On the contrary, dissolution of the <span class="hlt">Al</span> substrate and migration of <span class="hlt">Al</span>-rich particles into the bulk of the solder were observed.</p> <div class="credits"> <p class="dwt_author">Pstru?, Janusz; Gancarz, Tomasz</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-05-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">242</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013JCrGr.383...25P"> <span id="translatedtitle">Growth and characterization of <span class="hlt">AlGaN/AlN/GaN/Al</span>GaN double heterojunction structures with <span class="hlt">Al</span>GaN as buffer layers</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">High electron mobility transistors (HEMTs) structures with GaN, <span class="hlt">Al</span>0.025Ga0.975N and <span class="hlt">Al</span>0.04Ga0.96N high resistivity (HR) buffers were grown on sapphire by metal organic chemical vapor deposition (MOCVD). The structural and electrical properties of these three samples were investigated and compared. By increasing <span class="hlt">Al</span> composition of <span class="hlt">Al</span>GaN buffer, full width at half maximum (FWHM) values of (0002) and (10-12) x-ray rocking curves for buffer increase, indicating higher threading dislocation density. Room temperature noncontact Hall measurements were performed, and the measured 2DEG mobility was 1828 cm2/V s for GaN buffer, 1728 cm2/V s for <span class="hlt">Al</span>0.025Ga0.975N buffer, and 1649 cm2/V s for <span class="hlt">Al</span>0.04Ga0.96N buffer, respectively. Combining the theoretical calculation with the experiments, it was demonstrated that the decrease of mobility was attributed to higher dislocation density in sample with higher <span class="hlt">Al</span> composition of <span class="hlt">Al</span>GaN buffer. Devices were fabricated and it was found that the double heterojunction (DH) HEMT with <span class="hlt">Al</span>0.025Ga0.975N buffer could effectively reduce the buffer leakage current.</p> <div class="credits"> <p class="dwt_author">Peng, Enchao; Wang, Xiaoliang; Xiao, Hongling; Wang, Cuimei; Yin, Haibo; Chen, Hong; Feng, Chun; Jiang, Lijuan; Hou, Xun; Wang, Zhanguo</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">243</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40939388"> <span id="translatedtitle">Microstructures and wear resistances of hybrid <span class="hlt">Al–(Al</span> 3Ti+<span class="hlt">Al</span> 3Ni) FGMs fabricated by a centrifugal method</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The <span class="hlt">Al</span> based functionally graded materials (FGMs), reinforced by a hybrid of <span class="hlt">Al</span>3Ti platelets and <span class="hlt">Al</span>3Ni granular particles, were fabricated by the centrifugal method with both ingots of commercial <span class="hlt">Al</span>–5mass%Ti and <span class="hlt">Al</span>–20mass%Ni master alloys. The ratios of <span class="hlt">Al</span>–Ti and <span class="hlt">Al</span>–Ni alloys were 3:1, 1:1 and 1:3 (in mass), and the applied G numbers are 30, 50 and 80. The microstructures</p> <div class="credits"> <p class="dwt_author">Yoshimi Watanabe; Tatsuru Nakamura</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">244</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40504905"> <span id="translatedtitle">Investigation of Ti<span class="hlt">Al</span>\\/Ti 2<span class="hlt">Al</span>C composites prepared by spark plasma sintering</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Ti<span class="hlt">Al</span>\\/Ti2<span class="hlt">Al</span>C composites were produced by spark plasma sintering technology from mixed powders of Ti, <span class="hlt">Al</span> and TiC. X-ray diffraction (XRD) patterns showed that the sintered products mainly consisted of Ti<span class="hlt">Al</span> and Ti2<span class="hlt">Al</span>C phases. Electric probe microcosmic analysis (EPMA) photos indicated different microstructures depending on composition. In one case, when 7vol.%TiC was mixed in the starting powders, the produced Ti2<span class="hlt">Al</span>C particles</p> <div class="credits"> <p class="dwt_author">Bingchu Mei; Yoshinari Miyamoto</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">245</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=UCRLTRANS11534"> <span id="translatedtitle">Anodic Behavior of <span class="hlt">Al</span> and the Alloys <span class="hlt">Al</span>-In and <span class="hlt">Al</span>-In-Ga in Aluminum-Air Batteries.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">By recording of the polarization characteristics and measurement of the currents of self-dissolution, the anodic behavior of aluminum and the alloys <span class="hlt">Al</span>-In and <span class="hlt">Al</span>-In-Ga was tested under the operating conditions of aluminum-air batteries. The tests were con...</p> <div class="credits"> <p class="dwt_author">D. M. Drazic A. R. Despic S. K. Zecevic</p> <p class="dwt_publisher"></p> <p class="publishDate">1979-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">246</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/100618"> <span id="translatedtitle">Heterogeneous nucleation of solidification of Si in <span class="hlt">Al</span>-Si and <span class="hlt">Al</span>-Si-P alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Heterogeneous nucleation of solidification in melt spun <span class="hlt">Al</span>-Si and <span class="hlt">Al</span>-Si-P has been studied using differential scanning calorimetry, and transmission, scanning transmission and high resolution electron microscopies. The microstructures of the heat treated melt spun alloys all consist of an <span class="hlt">Al</span> matrix, <span class="hlt">Al</span>-Si eutectic distributed along the <span class="hlt">Al</span> grain boundaries, and Si embedded in the <span class="hlt">Al</span> matrix. The Si microstructure depends on the level of P: coarse faceted Si particles are nucleated by <span class="hlt">Al</span>P particles in <span class="hlt">Al</span>-Si containing 2 ppm P and <span class="hlt">Al</span>-Si-P containing 35 ppm P whereas eutectic droplets of fine Si particles are nucleated by the surrounding <span class="hlt">Al</span> matrix at a high undercooling in <span class="hlt">Al</span>-Si containing 0.25 ppm P. The Si nucleation onset temperature remains approximately constant while the peak and end temperatures both decrease with increasing cooling rate, in agreement with classical nucleation theory. Kinetic analysis, using the spherical cap model gives contact angles of 10{degree}, 43{degree} and 10{degree} for Si nucleation in low and high purity <span class="hlt">Al</span>-Si and <span class="hlt">Al</span>-Si-P respectively.</p> <div class="credits"> <p class="dwt_author">Ho, C.R.; Cantor, B. [Oxford Univ. (United Kingdom)] [Oxford Univ. (United Kingdom)</p> <p class="dwt_publisher"></p> <p class="publishDate">1995-08-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">247</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.gpo.gov:80/fdsys/pkg/FR-2010-02-01/pdf/2010-1959.pdf"> <span id="translatedtitle">75 FR 5120 - United States, et <span class="hlt">al</span>. v. Stericycle, Inc., et <span class="hlt">al</span>.; Proposed Final Judgment and Competitive Impact...</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013</a></p> <p class="result-summary">...DEPARTMENT OF JUSTICE Antitrust Division United States, et <span class="hlt">al</span>. v. Stericycle, Inc., et <span class="hlt">al</span>.; Proposed Final Judgment and Competitive Impact...Court for the District of Columbia in United States, et <span class="hlt">al</span>. v. Stericycle, Inc., et <span class="hlt">al</span>., Civil...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2010-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">248</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/15020715"> <span id="translatedtitle">Stress Corrosion Cracking of <span class="hlt">Al</span>-Mg and Mg-<span class="hlt">Al</span> Alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Aluminum and magnesium based alloys are being used for reducing the weight of automobiles. For structural applications they must have adequate stress corrosion resistance and yet, under some circumstances, stress corrosion cracking can occur in both alloy systems. Precipitation of the Mg rich Beta-phase (<span class="hlt">Al</span>3Mg2) at grain boundaries of <span class="hlt">Al</span>-Mg alloys and the Beta-phase (Mg17<span class="hlt">Al</span>12) at grain boundaries of the Mg-<span class="hlt">Al</span> alloys are critical factors in their stress corrosion performance. In Mg-<span class="hlt">Al</span>, the Beta-phase is cathodic to the matrix while in the <span class="hlt">Al</span>-Mg case, the Beta-phase is anodic to the matrix. These phases produce localized galvanic induced-corrosion that leads to intergranular stress corrosion cracking and cracking growth rates of 5 and 103 times faster than the solution treated condition, for <span class="hlt">Al</span>-Mg and Mg-<span class="hlt">Al</span>, respectively.</p> <div class="credits"> <p class="dwt_author">Jones, Russell H.; Vetrano, John S.; Windisch, Charles F.</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">249</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=DE89012981"> <span id="translatedtitle">Microstructural Evolution of <span class="hlt">Al</span>-Li and <span class="hlt">Al</span>-Li-Cu-Mg Alloys.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">Since subsequent microstructures and properties depend upon initial decomposition processes, the early developments in a binary <span class="hlt">Al</span>-Li and quaternary <span class="hlt">Al</span>-Li-Cu-Mg alloy were observed by high resolution transmission electron microscopy. Interpretation of hig...</p> <div class="credits"> <p class="dwt_author">S. Miyasato G. Thomas</p> <p class="dwt_publisher"></p> <p class="publishDate">1989-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">250</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=AD740826"> <span id="translatedtitle">A Structural Stability-Mechanical Behavior Correlation in Eutectic <span class="hlt">Al-CuAl</span>(2).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">Attention is directed to the effects of physiocochemical instability and the associated structural changes on the ambient temperature mechanical behavior of lamellar <span class="hlt">Al-CuAl</span>2. A detailed correlation is made of tensile yielding, flow, and fracture morpholo...</p> <div class="credits"> <p class="dwt_author">A. Pattnaik A. Lawley</p> <p class="dwt_publisher"></p> <p class="publishDate">1972-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">251</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.alsa.org/als-care/resources/publications-videos/factsheets/patient-bill-of-rights.html"> <span id="translatedtitle"><span class="hlt">ALS</span> Association's Patient Bill of Rights for People Living with <span class="hlt">ALS</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://medlineplus.gov/">MedlinePLUS</a></p> <p class="result-summary">... with <span class="hlt">ALS</span> Manuals <span class="hlt">ALS</span> Association Brochures Webinars Our Videos Factsheets Library Order Form Products to Aid in Daily Living Informative Web Links Books Daily Activities Made Easier Stories of Courage Search ...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">252</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24815517"> <span id="translatedtitle">Quantitatively probing the <span class="hlt">Al</span> distribution in zeolites.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">The degree of substitution of Si(4+) by <span class="hlt">Al</span>(3+) in the oxygen-terminated tetrahedra (<span class="hlt">Al</span> T-sites) of zeolites determines the concentration of ion-exchange and Brønsted acid sites. Because the location of the tetrahedra and the associated subtle variations in bond angles influence the acid strength, quantitative information about <span class="hlt">Al</span> T-sites in the framework is critical to rationalize catalytic properties and to design new catalysts. A quantitative analysis is reported that uses a combination of extended X-ray absorption fine structure (EXAFS) analysis and (27)<span class="hlt">Al</span> MAS NMR spectroscopy supported by DFT-based molecular dynamics simulations. To discriminate individual <span class="hlt">Al</span> atoms, sets of ab initio EXAFS spectra for various T-sites are generated from DFT-based molecular dynamics simulations, allowing quantitative treatment of the EXAFS single- and multiple-photoelectron scattering processes out to 3-4 atom shells surrounding the <span class="hlt">Al</span> absorption center. It is observed that identical zeolite types show dramatically different <span class="hlt">Al</span> distributions. A preference of <span class="hlt">Al</span> for T-sites that are part of one or more 4-member rings in the framework over those T-sites that are part of only 5- and 6-member rings in an HBEA150 zeolite has been determined using this analysis. PMID:24815517</p> <div class="credits"> <p class="dwt_author">Vjunov, Aleksei; Fulton, John L; Huthwelker, Thomas; Pin, Sonia; Mei, Donghai; Schenter, Gregory K; Govind, Niranjan; Camaioni, Donald M; Hu, Jian Zhi; Lercher, Johannes A</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-06-11</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">253</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=20080047349&hterms=Alstom&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DAlstom"> <span id="translatedtitle">Durability Assessment of Ti<span class="hlt">Al</span> Alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The durability of Ti<span class="hlt">Al</span> is a prime concern for the implementation of Ti<span class="hlt">Al</span> into aerospace engines. Two durability issues, the effect of high temperature exposure on mechanical properties and impact resistance, have been investigated and the results are summarized in this paper. Exposure to elevated temperatures has been shown to be detrimental to the room temperature ductility of gamma alloys with the most likely mechanisms being the ingress of interstitials from the surface. Fluorine ion implantation has been shown to improve the oxidation resistance of gamma alloys, and ideally it could also improve the environmental embrittlement of high Nb content Ti<span class="hlt">Al</span> alloys. The effect of F ion implantation on the surface oxidation and embrittlement of a third generation, high Nb content Ti<span class="hlt">Al</span> alloy (Ti-45<span class="hlt">Al</span>-5Nb-B-C) were investigated. Additionally, the ballistic impact resistance of a variety of gamma alloys, including Ti-48<span class="hlt">Al</span>-2Cr- 2Nb, Ti-47<span class="hlt">Al</span>-2Cr-2Nb, ABB-2, ABB-23, NCG359E, 95A and Ti-45<span class="hlt">Al</span>-5Nb-B-C was accessed. Differences in the ballistic impact properties of the various alloys will be discussed, particularly with respect to their manufacturing process, microstructure, and tensile properties.</p> <div class="credits"> <p class="dwt_author">Draper, Susan L.; Lerch, Bradley A.</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">254</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://eric.ed.gov/?q=%22al%22&pg=2&id=EJ997797"> <span id="translatedtitle">Diana <span class="hlt">Al</span>-Hadid: Identity and Heritage</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p class="result-summary">Diana <span class="hlt">Al</span>-Hadid's sculptures reflect the many locations, cultures, histories, and mythologies that have shaped her as an artist. In large-scale works which have the appearance of architectural ruins, <span class="hlt">Al</span>-Hadid employs imagery drawn from many diverse interests including science and technology, history, and literature. She also incorporates images and…</p> <div class="credits"> <p class="dwt_author">Jungerberg, Tom; Smith, Anna; Borsh, Colleen</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">255</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=ADA543813"> <span id="translatedtitle">Future of <span class="hlt">Al</span> Qa'ida.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">The death of Osama bin Laden has triggered a re-evaluation of <span class="hlt">al</span> Qa'ida and its threat to the United States. Some have argued that <span class="hlt">al</span> Qa'ida will become increasingly irrelevant. 'Between the Arab Spring and the death of bin Laden, it is hard to imagine gr...</p> <div class="credits"> <p class="dwt_author">S. G. Jones</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">256</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/39864150"> <span id="translatedtitle">Modification of hypoeutectic <span class="hlt">Al</span>-Si alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Modification of the <span class="hlt">Al</span>-Si eutectic microstructure has been studied by using the entrained droplet technique in a range of hypoeutectic <span class="hlt">Al</span>-Si alloys doped with different levels of phosphorus and sodium. Differential scanning calorimetry has been used to investigate the kinetics of silicon nucleation during eutectic solidification, and transmission and scanning transmission electron microscopy has been used to investigate the eutectic</p> <div class="credits"> <p class="dwt_author">C. R. Ho; B. Cantor</p> <p class="dwt_publisher"></p> <p class="publishDate">1995-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">257</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=ADA526329"> <span id="translatedtitle">Precipitation Evolution in <span class="hlt">Al</span>-0.1Sc, <span class="hlt">Al</span>-0.1Zr and <span class="hlt">Al</span>-0.1Sc-0.1Zr (at.%) Alloys During Isochronal Aging.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">Precipitation strengthening is investigated in binary <span class="hlt">Al</span>-0.1Sc, <span class="hlt">Al</span>- 0.1Zr and ternary <span class="hlt">Al</span>-0.1-c-0.1Zr (at.%) alloys aged isochronally between 200 and 600 C. Precipitation of <span class="hlt">Al</span>3Sc (L12) commences between 200 and 250 C in <span class="hlt">Al</span>- 0.1Sc, reaching a 670 MPa peak ...</p> <div class="credits"> <p class="dwt_author">C. P. Lee D. C. Dunand D. N. Seidman K. E. Knipling R. A. Karnesky</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">258</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3169149"> <span id="translatedtitle">Energetics of <span class="hlt">Al</span>13 Keggin cluster compounds</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p class="result-summary">The ?-<span class="hlt">Al</span>13 Keggin aluminum hydroxide clusters are essential models in establishing molecular pathways for geochemical reactions. Enthalpies of formation are reported for two salts of aluminum centered ?-Keggin clusters, <span class="hlt">Al</span>13 selenate, (Na(<span class="hlt">Al</span>O4)<span class="hlt">Al</span>12(OH)24(SeO4)4•12H2O) and <span class="hlt">Al</span>13 sulfate, (Na<span class="hlt">Al</span>O4<span class="hlt">Al</span>12(OH)24(SO4)4•12H2O). The measured enthalpies of solution, ?Hsol, at 28?°C in 5 N HCl for the ?-<span class="hlt">Al</span>13 selenate and sulfate are ?924.57 (± 3.83) and ?944.30 ( ± 5.66) kJ·mol-1, respectively. The enthalpies of formation from the elements, ?Hf,el, for <span class="hlt">Al</span>13 selenate and sulfate are ?19,656.35 ( ± 67.30) kJ·mol-1, and ?20,892.39 ( ± 70.01) kJ·mol-1, respectively. In addition, ?Hf,el for sodium selenate decahydrate was calculated using data from high temperature oxide melt solution calorimetry measurements: ?4,006.39 ( ± 11.91) kJ·mol-1. The formation of both ?-<span class="hlt">Al</span>13 Keggin cluster compounds is exothermic from oxide-based components but energetically unfavorable with respect to a gibbsite-based assemblage. To understand the relative affinity of the ?-Keggin clusters for selenate and sulfate, the enthalpy associated with two S-Se exchange reactions was calculated. In the solid state, selenium is favored in the <span class="hlt">Al</span>13 compound relative to the binary chalcogenate, while in 5 N HCl, sulfur is energetically favored in the cluster compound compared to the aqueous solution. This contribution represents the first thermodynamic study of ?-<span class="hlt">Al</span>13 cluster compounds and establishes a method for other such molecules, including the substituted versions that have been created for kinetic studies. Underscoring the importance of ?-<span class="hlt">Al</span>13 clusters in natural and anthropogenic systems, these data provide conclusive thermodynamic evidence that the <span class="hlt">Al</span>13 Keggin cluster is a crucial intermediate species in the formation pathway from aqueous aluminum monomers to aluminum hydroxide precipitates.</p> <div class="credits"> <p class="dwt_author">Armstrong, Christopher R.; Casey, William H.; Navrotsky, Alexandra</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">259</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19840053031&hterms=trigger+points&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D80%26Ntt%3Dtrigger%2Bpoints"> <span id="translatedtitle"><span class="hlt">Al</span>-26 in the interstellar medium</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The amount of dispersed interstellar <span class="hlt">Al</span>-26 detected by the HEAO 3 gamma-ray spectrometer cannot have been synthesized by supernova explosions if current calculations of the production ratio p(26)/p(27) approximately equal to 0.001 are correct. Simple models of chemical evolution of the Galaxy are presented to explain this point. The observed <span class="hlt">Al</span>-26 is more likely due to about 100 million dispersed novae, or to a single old (10,000-1,000,000 yr) supernova remnant that today surrounds the solar system. If the <span class="hlt">Al</span>-26 is dispersed, the high interstellar ratio today <span class="hlt">Al</span>-26/<span class="hlt">Al</span>-27 about equal to 0.00002 calls into question the requirement that a supernova trigger for formation of the solar system was the cause of a concentration 3-times larger. Also discussed is p-process production in novae with application to the question of live Sm-146 in the solar system.</p> <div class="credits"> <p class="dwt_author">Clayton, D. D.</p> <p class="dwt_publisher"></p> <p class="publishDate">1984-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">260</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19940007975&hterms=coarsened&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dcoarsened"> <span id="translatedtitle">Ni<span class="hlt">Al</span> alloys for structural uses</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">Alloys based on the intermetallic compound Ni<span class="hlt">Al</span> are of technological interest as high temperature structural alloys. These alloys possess a relatively low density, high melting temperature, good thermal conductivity, and (usually) good oxidation resistance. However, Ni<span class="hlt">Al</span> and Ni<span class="hlt">Al</span>-base alloys suffer from poor fracture resistance at low temperatures as well as inadequate creep strength at elevated temperatures. This research program explored macroalloying additions to Ni<span class="hlt">Al</span>-base alloys in order to identify possible alloying and processing routes which promote both low temperature fracture toughness and high temperature strength. Initial results from the study examined the additions of Fe, Co, and Hf on the microstructure, deformation, and fracture resistance of Ni<span class="hlt">Al</span>-based alloys. Of significance were the observations that the presence of the gamma-prime phase, based on Ni3<span class="hlt">Al</span>, could enhance the fracture resistance if the gamma-prime were present as a continuous grain boundary film or 'necklace'; and the Ni-35<span class="hlt">Al</span>-20Fe alloy was ductile in ribbon form despite a microstructure consisting solely of the B2 beta phase based on Ni<span class="hlt">Al</span>. The ductility inherent in the Ni-35<span class="hlt">Al</span>-20Fe alloy was explored further in subsequent studies. Those results confirm the presence of ductility in the Ni-35<span class="hlt">Al</span>-20Fe alloy after rapid cooling from 750 - 1000 C. However exposure at 550 C caused embrittlement; this was associated with an age-hardening reaction caused by the formation of Fe-rich precipitates. In contrast, to the Ni-35<span class="hlt">Al</span>-20Fe alloy, exploratory research indicated that compositions in the range of Ni-35<span class="hlt">Al</span>-12Fe retain the ordered B2 structure of Ni<span class="hlt">Al</span>, are ductile, and do not age-harden or embrittle after thermal exposure. Thus, our recent efforts have focused on the behavior of the Ni-35<span class="hlt">Al</span>-12Fe alloy. A second parallel effort initiated in this program was to use an alternate processing technique, mechanical alloying, to improve the properties of Ni<span class="hlt">Al</span>-alloys. Mechanical alloying in the conventional sense requires ductile powder particles which, through a cold welding and fracture process, can be dispersion strengthened by submicron-sized oxide particles. Using both the Ni-35<span class="hlt">Al</span>-Fe alloys to contain approx. 1 v/o Y2O3. Preliminary results indicate that mechanically alloyed and extruded Ni<span class="hlt">Al</span>-Fe + Y2O3 alloys when heat treated to a grain-coarsened condition, exhibit improved creep resistance at 1000 C when compared to Ni<span class="hlt">Al</span>; oxidation resistance comparable to Ni<span class="hlt">Al</span>; and fracture toughness values a factor of three better than Ni<span class="hlt">Al</span>. As a result of the research initiated on this NASA program, a subsequent project with support from Inco Alloys International is underway.</p> <div class="credits"> <p class="dwt_author">Koss, D. A.</p> <p class="dwt_publisher"></p> <p class="publishDate">1991-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_12");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' 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onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">261</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2003JPCM...15..385S"> <span id="translatedtitle">Structure development in amorphous <span class="hlt">Al</span> La alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Melt-spun <span class="hlt">Al</span> alloys containing 2.7-10 at.% La were studied by means of x-ray diffraction, transmission electron microscopy, electrical resistivity, thermal and microhardness measurements. Fully amorphous structures were only obtained for thin <span class="hlt">Al</span>La7.7 and <span class="hlt">Al</span>La10 ribbons and exhibit concentration fluctuations. Phase separation into two metastable bcc structures is observed; they appear successively and are finally replaced by the equilibrium phases alpha (fcc)<span class="hlt">Al</span> and (orthorhombic)<span class="hlt">Al</span>11La3. The transformation kinetics is analysed in terms of a general Johnson-Mehl-Avrami-Kolmogorov model and of local kinetic parameters. The Avrami exponent monitors changes in the crystallization behaviour; nucleation of the stable phases occurs after partial dissolution of the metastable phases. The low values of the activation energy reflect the high instability of these glasses.</p> <div class="credits"> <p class="dwt_author">Schmidt, U.; Eisenschmidt, Ch; Syrowatka, F.; Bartusch, R.; Zahra, C. Y.; Zahra, A.-M.</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">262</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/42695786"> <span id="translatedtitle">Tree fine root Ca\\/<span class="hlt">Al</span> molar ratio – Indicator of <span class="hlt">Al</span> and acidity stress</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">High soil acidity and elevated soil <span class="hlt">Al</span> concentrations limit plant growth in many terrestrial ecosystems. Aluminium toxicity can be ameliorated by Ca. Thus, Ca\\/<span class="hlt">Al</span> molar ratios in soil solution and in plant tissues have been proposed as superior indicators than <span class="hlt">Al</span> concentration itself for evaluating the <span class="hlt">Al</span> toxicity stress to trees (Cronan & Grigal, J Environ Qual 1995;24:209 – 226). This article</p> <div class="credits"> <p class="dwt_author">E. I. Vanguelova; Y. Hirano; T. D. Eldhuset; L. Sas-Paszt; M. R. Bakker; Ü. Püttsepp; I. Brunner; K. Lõhmus; D. Godbold</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">263</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2005GeCoA..69.5263K"> <span id="translatedtitle">Assessment of isotopically exchangeable <span class="hlt">Al</span> in soil materials using 26<span class="hlt">Al</span> tracer</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The solubility of aluminium (<span class="hlt">Al</span>) in many acidic soils is controlled by complexation reactions with soil organic matter. In such soils, <span class="hlt">Al</span> solubility is theoretically a function of the pool size of "active" <span class="hlt">Al</span>, i.e., the total amount of <span class="hlt">Al</span> that equilibrates with the soil solution within a defined period of time. To date, no reliable measurements of "active" <span class="hlt">Al</span> in soil materials exist. In this study, we determined the isotopically exchangeable pool of <span class="hlt">Al</span> ( EAl) as an operationally defined assessment of "active" <span class="hlt">Al</span> in acidic mineral soils. The suitability of CuCl 2 and pyrophosphate (Na 4P 2O 7) as extractants for "active" <span class="hlt">Al</span> was also evaluated. Eleven samples, mostly from spodic B horizons, were spiked with carrier-free 26<span class="hlt">Al</span> and equilibrated for different time periods (1-756 h). The size of the <span class="hlt">Al</span> pool with which the 26<span class="hlt">Al</span> tracer exchanged increased with time during the whole experimental period. Thus, contact time between solid and solution phases needs to be defined when assessing the "active" <span class="hlt">Al</span> pool. Values of EAl obtained after 1 to 5 d of equilibration were equal to the amount of CuCl 2 extractable <span class="hlt">Al</span>, but considerably smaller than the Na 4P 2O 7-extractable pool. Equilibration times greater than 5 d resulted in CuCl 2 extractable <span class="hlt">Al</span> concentrations that under-estimated the "active" <span class="hlt">Al</span> pool. Three of the investigated samples were rich in imogolite-type materials (ITM). In these samples, 30-50 % of the added 26<span class="hlt">Al</span> rapidly became associated with soil constituents in forms that could not be extracted by Na 4P 2O 7, indicating that a part of ITM may be in a dynamic state.</p> <div class="credits"> <p class="dwt_author">Kleja, D. Berggren; Standring, W.; Oughton, D. H.; Gustafsson, J.-P.; Fifield, K.; Fraser, A. R.</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-11-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">264</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/54623165"> <span id="translatedtitle">TEM study of Pt nanoparticles on gamma <span class="hlt">Al</span>2O3\\/Ni<span class="hlt">Al</span> support</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Pt gamma <span class="hlt">Al</span>2O3 as one of the most important catalysts has attracted much attention in research. Moving beyond the current phenomenological understanding of the nanoparticle support interaction necessitates the examination of the Pt\\/ gamma-<span class="hlt">Al</span>2O3 interface at the atomic level. To produce the model interface, Ni<span class="hlt">Al</span>(110) single crystal was oxidized at 1223K in order to fabricate gamma <span class="hlt">Al</span>2O3 (440). The crystallinity</p> <div class="credits"> <p class="dwt_author">Zhongfan Zhang; Long Li; Judith Yang</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">265</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/e785k374m5551555.pdf"> <span id="translatedtitle">Damage mechanisms in a cast ductile iron and a <span class="hlt">Al</span> 2 O 3 p \\/<span class="hlt">Al</span> composite</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Mechanical behavior and damage mechanisms of an <span class="hlt">Al</span>2O3 particulate-reinforced <span class="hlt">Al</span> matrix composite (<span class="hlt">Al</span>2O3p\\u000a \\/<span class="hlt">Al</span>) prepared by pressure infiltration are investigated and compared with those of a cast ductile iron. In addition to low\\u000a cost and reduced weight, the composite has a Young’s modulus comparable to the ductile iron. However, its fracture toughness\\u000a is lower than that of the ductile iron.</p> <div class="credits"> <p class="dwt_author">J. H. Zhu; P. K. Liaw; J. M. Corum; J. G. R. Hansen; J. A. Cornie</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">266</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/39866701"> <span id="translatedtitle">Simulation of clusters formation in <span class="hlt">Al</span>-Cu based and <span class="hlt">Al</span>-Zn based alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">A Monte Carlo computer simulation is adopted to investigate the role of micro-alloying elements Mg and Ag in <span class="hlt">Al</span>-Cu and <span class="hlt">Al</span>-Zn alloys. Small amount additions of Mg to the <span class="hlt">Al</span>-Cu alloy markedly retard the formation of Cu clusters due to the preferential trapping of free-vacancies available for Cu diffusion. On the other hand, additions of Mg to the <span class="hlt">Al</span>-Zn alloy</p> <div class="credits"> <p class="dwt_author">Daqin Chen; Yuansheng Wang</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">267</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19980019510&hterms=sodium+bicarbonate&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3Dsodium%2Bbicarbonate"> <span id="translatedtitle">Corrosion Studies of 2195 <span class="hlt">Al</span>-Li Alloy and 2219 <span class="hlt">Al</span> Alloy with Differing Surface Treatments</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">Corrosion studies of 2195 <span class="hlt">Al</span>-Li and 2219 <span class="hlt">Al</span> alloys have been conducted using the scanning reference electrode technique (SRET) and the polarization resistance (PR) technique. The SRET was used to study corrosion mechanisms, while corrosion rate measurements were studied with the PR technique. Plates of <span class="hlt">Al</span>203 blasted, soda blasted and conversion coated 2219 <span class="hlt">Al</span> were coated with Deft primer and the corrosion rates studied with the EIS technique. Results from all of these studies are presented.</p> <div class="credits"> <p class="dwt_author">Danford, M. D.; Mendrek, M. J.</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">268</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/19441466"> <span id="translatedtitle">Thermal stability of Ti<span class="hlt">Al</span>N and nanocomposite Ti<span class="hlt">Al</span>SiN thin films.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Ti<span class="hlt">Al</span>N and Ti<span class="hlt">Al</span>SiN coatings were synthesized by a cathodic arc deposition process. Titanium, Ti50<span class="hlt">Al</span>50 alloy and <span class="hlt">Al</span>Si (88 at.% of <span class="hlt">Al</span> and 12 at.% of Si) alloy targets were adopted as the cathode materials. X-ray diffraction analyses revealed that Ti0.5<span class="hlt">Al</span>0.5N and Ti49<span class="hlt">Al</span>0.44Si0.07N possess a B1-NaCl crystal structure. The lattice constants of the Ti0.5<span class="hlt">Al</span>0.5N and Ti0.49<span class="hlt">Al</span>0.44Si0.07N calculated from XRD pattern were 0.418 nm and 0.422 nm, respectively. For the high temperature oxidation test, the coated samples were annealed at 900 degrees C in air atmosphere for 2 hours. In this study, the deposited Ti0.5<span class="hlt">Al</span>0.5N had completely transformed to TiO2 and <span class="hlt">Al</span>2O3, and Ti0.49<span class="hlt">Al</span>0.44Si0.07N remained the as-deposited structure after oxidation treatment. It indicated that Ti0.49<span class="hlt">Al</span>0.44Si0.07N possesses superior oxidation resistance than Ti0.5<span class="hlt">Al</span>0.5N, due to the amorphous SiNx phase existed in the nanocomposite structure. The different oxidation mechanisms of Ti50<span class="hlt">Al</span>50N and Ti0.49<span class="hlt">Al</span>0.44Si0.07N at high temperature of 900 degrees C are developed in this study. PMID:19441466</p> <div class="credits"> <p class="dwt_author">Yang, Sheng-Min; Chang, Yin-Yu; Lin, Dong-Yih; Wang, Da-Yung; Wu, Weite</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">269</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/51754266"> <span id="translatedtitle">27<span class="hlt">Al</span>-NQR\\/NMR Study of Kondo Semiconductor CeFe2<span class="hlt">Al</span>10</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">27<span class="hlt">Al</span>-NQR\\/NMR measurements have been performed on CeFe2<span class="hlt">Al</span>10 in relevance to the novel phase below T0=27 K of isostructural CeRu2<span class="hlt">Al</span>10. NQR peaks are assigned to five crystallographically inequivalent <span class="hlt">Al</span> sites. No splitting of the NQR spectra down to 1.5 K confirms the lack of phase transition in this compound. The gaplike decrease in the spin-lattice relaxation rate 1\\/T1 above about 20</p> <div class="credits"> <p class="dwt_author">Yukihiro Kawamura; Shingo Edamoto; Tomoaki Takesaka; Takashi Nishioka; Harukazu Kato; Masahiro Matsumura; Yo Tokunaga; Shinsaku Kambe; Hiroshi Yasuoka</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">270</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.scipub.org/fulltext/ajes/ajes53434-443.pdf"> <span id="translatedtitle">Water Quality and Planktonic Communities in <span class="hlt">Al</span>-Khadoud Spring, <span class="hlt">Al</span>-Hassa,Saudi Arabia</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Problem statement: <span class="hlt">Al</span>-Khadoud spring is one of the most important wat er resources in <span class="hlt">Al</span>- Hassa Governorate, Saudi Arabia. However, much of its biotic information is still unknown. This study presented preliminary ecological information of thi s aquatic body. The aim of this research was to study the water characteristics and the planktonic organisms inhibiting <span class="hlt">Al</span>-Khadoud spring and its irrigational</p> <div class="credits"> <p class="dwt_author">Adel A. Fathi; Mohammed A. Al-Kahtani</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">271</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=N19980210984"> <span id="translatedtitle">CVD Fiber Coatings for <span class="hlt">Al</span>2O3/Ni<span class="hlt">Al</span> Composites.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">While sapphire-fiber-reinforced nickel aluminide (<span class="hlt">Al</span>2O3/Ni<span class="hlt">Al</span>) composites are an attractive candidate for high-temperature structures, the significant difference in the coefficient of thermal expansion between the Ni<span class="hlt">Al</span> matrix and the sapphire fiber creates...</p> <div class="credits"> <p class="dwt_author">D. E. Boss</p> <p class="dwt_publisher"></p> <p class="publishDate">1995-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">272</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/5875445"> <span id="translatedtitle"><span class="hlt">Al</span>-Cu-Fe-Pd-Mn and <span class="hlt">Al</span>-Cr-Pd-Mn quasicrystalline alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">While searching for new multicomponent quasicrystalline alloys, the authors have suggested a principle of composition activity in the quasicrystal constitution. This means that some new quasicrystals can be constituted by adding several quasicrystalline alloy compositions, and these alloys can be obtained by means of rapid solidification or ingot processing. Guided by this principle, <span class="hlt">Al</span>-Mn-Cr, <span class="hlt">Al</span>-Cu-Fe-Mn, <span class="hlt">Al</span>-Cu-Fe-Cr, <span class="hlt">Al</span>-Cu-Fe-Cr-Mn, <span class="hlt">Al</span>-Mn-Ni-Ti, <span class="hlt">Al</span>-Mn-Fe-Ti, <span class="hlt">Al</span>-Cu-Fe-Ni-Ti and other multicomponent quasicrystalline alloys have been found. A recent study used <span class="hlt">Al</span>[sub 70]Pd[sub 20]Mn[sub 10], <span class="hlt">Al</span>[sub 65]Cu[sub 20]Fe[sub 15] and <span class="hlt">Al</span>[sub 85]Cr[sub 15] quasicrystalline alloys to formulate new alloys. Both <span class="hlt">Al</span>-Cu-Fe-Pd-Mn and <span class="hlt">Al</span>-Cr-Pd-Mn alloys are quasicrystalline. In this paper, they discuss these two quasicrystals, their formation, electronic diffraction and composition scope and thermal stability in detail.</p> <div class="credits"> <p class="dwt_author">Chen Zhenhua (Univ. of Technology, Hunan (China). Powder Metallurgy Research Inst.); Inoue, Akihisa; Masumoto, Tsuyoshi (Tohoku Univ. (Japan). Metal Research Inst.)</p> <p class="dwt_publisher"></p> <p class="publishDate">1993-12-15</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">273</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=CENBG7705"> <span id="translatedtitle">Production of exp 26 <span class="hlt">Al</span> by Spallation of Fe, Si, <span class="hlt">Al</span> Nuclei.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">Cross sections for exp 7 Be, exp 10 Be and exp 26 <span class="hlt">Al</span> formation in <span class="hlt">Al</span>, Si and Fe targets bombarded with 0.6 and 24GeV protons have been measured by using highly selective chemical separation and low-level background counters. Results for exp 26 <span class="hlt">Al</span> at 0.6Ge...</p> <div class="credits"> <p class="dwt_author">P. Paillard</p> <p class="dwt_publisher"></p> <p class="publishDate">1977-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">274</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/41314271"> <span id="translatedtitle">Effect of <span class="hlt">Al</span> coating conditions on laser weldability of <span class="hlt">Al</span> coated steel sheet</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary"><span class="hlt">Al</span> coated steel sheets with excellent heat resistance, thermal reflection, and corrosion resistance are widely used in various applications. The laser weldability of the <span class="hlt">Al</span> coated steel sheet for full penetration welding was reported. The phenomenon caused by intermixed aluminum and behavior of aluminum in the weld were investigated. <span class="hlt">Al</span> coated steel sheets that have various thickness and coating mass</p> <div class="credits"> <p class="dwt_author">Jung-Han LEE; Jong-Do KIM; Jin-Seok OH; Seo-Jeong PARK</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">275</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/41038204"> <span id="translatedtitle">Magnetism and solid solution effects in Ni<span class="hlt">Al</span> (40% <span class="hlt">Al</span>) alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The solid solution effects of ternary additions of transition elements in intermetallic Ni–40% <span class="hlt">Al</span> were investigated by both experimental studies and theoretical calculations. Co solute atoms when sitting at Ni sublattice sites do not affect the lattice parameter and hardening behavior of Ni–40<span class="hlt">Al</span>. On the other hand, Fe, Mn, and Cr solutes, which are mainly on <span class="hlt">Al</span> sublattice sites, substantially</p> <div class="credits"> <p class="dwt_author">Chain T Liu; Chong Long Fu; Matthew F Chisholm; James R Thompson; Maja Krcmar; Xun-Li Wang</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">276</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=ADA471059"> <span id="translatedtitle">Preparation of Optoelectronic Devices Based on <span class="hlt">AlN/Al</span>GaN Superlattices.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">We present results on growth and fabrication experiments of <span class="hlt">AlN/Al</span>GaN superlattices for ultraviolet 'UV' optoelectronic devices. Superlattices with extremely short periods have been studied. The <span class="hlt">Al</span>N 'barrier' layers are 0.5 nm thick, and the AlxGa1-xN 'we...</p> <div class="credits"> <p class="dwt_author">A. Chandolu B. Borisov G. Kipshidze J. Yun M. Holtz</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">277</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19910043314&hterms=alumina&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D90%26Ntt%3Dalumina"> <span id="translatedtitle">Reaction of Ti and Ti-<span class="hlt">Al</span> alloys with alumina</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The reaction of single-crystal <span class="hlt">Al</span>2O3 with pure Ti and Ti-<span class="hlt">Al</span> alloys with different <span class="hlt">Al</span> concentrations was examined in the temperature range of 1173 to 1573 K. Significant reaction occurred between <span class="hlt">Al</span>2O3 and the Ti-<span class="hlt">Al</span> alloys with <span class="hlt">Al</span> concentrations lower than that corresponding to the gamma-Ti<span class="hlt">Al</span> phase. The reaction mechanism was determined to be simultaneous diffusion of <span class="hlt">Al</span> and atomic oxygen from <span class="hlt">Al</span>2O3 into Ti and the Ti-<span class="hlt">Al</span> alloys.</p> <div class="credits"> <p class="dwt_author">Misra, Ajay K.</p> <p class="dwt_publisher"></p> <p class="publishDate">1991-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">278</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/47896183"> <span id="translatedtitle">Surface and interface analysis of PVD <span class="hlt">Al</span>ON and ?-<span class="hlt">Al</span>2O3 diffusion barriers</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The suitability of PVD films of ?-<span class="hlt">Al</span>2O3 and of ternary <span class="hlt">Al</span>-O-N as diffusion barriers between a nickel based superalloy CMSX-4 and NiCoCr<span class="hlt">Al</span>Y for a possible application\\u000a in gas turbines was investigated. Therefore, an <span class="hlt">Al</span>2O3 film and, alternatively, an <span class="hlt">Al</span>-O-N film were deposited on CMSX-4 at 100?°C substrate temperature by means of reactive magnetron\\u000a sputtering ion plating (MSIP). After characterization of</p> <div class="credits"> <p class="dwt_author">R. Cremer; M. Witthaut; K. Reichert; D. Neuschütz</p> <p class="dwt_publisher"></p> <p class="publishDate">1999-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">279</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/414333"> <span id="translatedtitle">Wet oxidation of <span class="hlt">Al</span>GaAs vs. <span class="hlt">Al</span>As: A little gallium is good</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Buried oxides formed from the wet oxidation of <span class="hlt">Al</span>GaAs alloys, rather than <span class="hlt">Al</span>As, are found to be superior in terms of oxidation isotropy, mechanical stability, and strain. It is not surprising that vertical-cavity surface-emitting lasers (VCSELs) using <span class="hlt">Al</span>GaAs oxide layers as current apertures have shown promising reliability as compared to VCSELs using <span class="hlt">Al</span>As layers. Comparisons of lifetime data for VCSELs with differing oxide layers is presented. The beneficial properties of oxides converted from <span class="hlt">Al</span>GaAs alloys are found to provide robust device processing of reliable VCSELs and may play an important role in other advanced optoelectronic devices.</p> <div class="credits"> <p class="dwt_author">Choquette, K.D.; Geib, K.M.; Hou, H.Q.; Lear, K.L.; Chui, H.C.; Hammons, B.E.; Nevers, J.A. [Sandia National Labs., Albuquerque, NM (United States). Photonics Research Dept.; Hull, R. [Sandia National Labs., Albuquerque, NM (United States). Photonics Research Dept.]|[Univ. of Virginia, Charlottesville, VA (United States). Dept. of Materials Science</p> <p class="dwt_publisher"></p> <p class="publishDate">1996-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">280</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=20020071128&hterms=Ni-In+japan&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DNi-In%2Bjapan"> <span id="translatedtitle">Atomistic Modeling of Ru<span class="hlt">Al</span> and (RuNi) <span class="hlt">Al</span> Alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">Atomistic modeling of Ru<span class="hlt">Al</span> and Ru<span class="hlt">Al</span>Ni alloys, using the BFS (Bozzolo-Ferrante-Smith) method for alloys is performed. The lattice parameter and energy of formation of B2 Ru<span class="hlt">Al</span> as a function of stoichiometry and the lattice parameter of (Ru(sub 50-x)Ni(sub x)<span class="hlt">Al</span>(sub 50)) alloys as a function of Ni concentration are computed. BFS based Monte Carlo simulations indicate that compositions close to Ru25Ni25<span class="hlt">Al</span>50 are single phase with no obvious evidence of a miscibility gap and separation of the individual B2 phases.</p> <div class="credits"> <p class="dwt_author">Gargano, Pablo; Mosca, Hugo; Bozzolo, Guillermo; Noebe, Ronald D.; Gray, Hugh R. (Technical Monitor)</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_13");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return 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Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">281</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2012SeScT..27l2001A"> <span id="translatedtitle">Hot-electron drift velocity in <span class="hlt">AlGaN/AlN/Al</span>GaN/GaN camelback channel</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Nanosecond pulses were employed to study hot-electron transport in a nominally undoped <span class="hlt">Al</span>0.33Ga0.67N/<span class="hlt">AlN/{Al</span>0.1Ga0.9N/GaN} heterostructure where the mobile electrons are spread in a composite {<span class="hlt">Al</span>0.1Ga0.9/GaN} dual channel exhibiting a camelback electron density profile at high electric fields. The highest velocity of ˜1.6× 107 cm s-1 was obtained at electric field of 160 kV cm-1 in the channel with the electron density of 0.8 × 1013?cm-2 owing to its proximity to the LO-phonon-plasmon resonance.</p> <div class="credits"> <p class="dwt_author">Ardaravi?ius, L.; Kiprijanovi?, O.; Liberis, J.; Matulionis, A.; Li, X.; Zhang, F.; Wu, M.; Avrutin, V.; Özgür, Ü.; Morkoç, H.</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">282</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2011APS..MARP25007N"> <span id="translatedtitle">Probing the origin of 1/f critical-current noise in nanoscale <span class="hlt">Al/AlOx/Al</span> Josephson junctions</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">We present measurements of the low frequency noise in nanoscale <span class="hlt">Al/AlOx/Al</span> Josephson junctions made by the shadow/angle evaporation technique. We investigate the differences in the nature of the charge trap fluctuations when the junction electrodes are in the normal state vs. in the superconducting state, as a test of some recent theoretical models. To do that, we compare the magnitude, temperature dependence, and magnetic field dependence of junction resistance fluctuations in the normal state above the <span class="hlt">Al</span> transition temperature to that of the resistance and critical current fluctuations measured in the superconducting state. We also explore whether the observed fluctuators are thermally-activated or tunneling as a function of temperature.</p> <div class="credits"> <p class="dwt_author">Nugroho, Christopher; Orlyanchik, Vladimir; Dove, Allison; Olson, Gustaf; Yoscovits, Zachary; Eckstein, James; van Harlingen, Dale</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-03-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">283</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/53598306"> <span id="translatedtitle">Anodic behavior of <span class="hlt">Al</span> and the alloys <span class="hlt">Al</span>-In and <span class="hlt">Al</span>-In-Ga in aluminum-air batteries</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The anodic behavior of aluminum and the alloys <span class="hlt">Al</span>-In and <span class="hlt">Al</span>-In-Ga was tested under the operating conditions of aluminum-air batteries. The tests were conducted in an aqueous solution of 2 M NaCl, and the results obtained were compared with the results obtained from a special test of these alloys as the anode in a standard electrochemical cell. Significant results and</p> <div class="credits"> <p class="dwt_author">D. M. Drazic; A. R. Despic; S. K. Zecevic</p> <p class="dwt_publisher"></p> <p class="publishDate">1979-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">284</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013Nanot..24I5203X"> <span id="translatedtitle">High-performance nonvolatile <span class="hlt">Al/Al</span>Ox/CdTe:Sb nanowire memory device</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Here we demonstrate a room temperature processed nonvolatile memory device based on an <span class="hlt">Al/Al</span>Ox/CdTe:Sb nanowire (NW) heterojunction. Electrical analysis shows an echelon hysteresis composed of a high-resistance state (HRS) and a low-resistance state (LRS), which can allow it to write and erase data from the device. The conductance ratio is as high as 106, with a retention time of 3 × 104 s. Moreover, the SET voltages ranged from +6 to +8 V, whilst the RESET voltage ?0 V. In addition, flexible memory nano-devices on PET substrate with comparable switching performance at bending condition were fabricated. XPS analysis of the <span class="hlt">Al/Al</span>Ox/CdTe:Sb NW heterojunction after controlled Ar+ bombardment reveals that this memory behavior is associated with the presence of ultra-thin <span class="hlt">Al</span>Ox film. This <span class="hlt">Al/Al</span>Ox/CdTe:Sb NW heterojunction will open up opportunities for new memory devices with different configurations.</p> <div class="credits"> <p class="dwt_author">Xie, Chao; Nie, Biao; Zhu, Long; Zeng, Long-Hui; Yu, Yong-Qiang; Wang, Xian-He; Fang, Qun-Ling; Luo, Lin-Bao; Wu, Yu-Cheng</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-09-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">285</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013JCrGr.377...32Z"> <span id="translatedtitle">High quality <span class="hlt">Al</span>GaN grown on ELO <span class="hlt">Al</span>N/sapphire templates</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The defect structure and the homogeneity of 1-3 µm thick AlxGa1-xN layers grown on epitaxially laterally overgrown (ELO) <span class="hlt">Al</span>N on patterned <span class="hlt">Al</span>N/sapphire templates have been investigated in dependence on the miscut direction of the c-plane sapphire substrates, the etching depth into the sapphire and the <span class="hlt">Al</span> concentration. It was found that shallowly etched <span class="hlt">Al</span>N/sapphire templates with a 0.25° miscut toward the a-plane provide a smooth surface of ELO <span class="hlt">Al</span>N and therefore a good <span class="hlt">Al</span> homogeneity in the overgrown <span class="hlt">Al</span>0.8Ga0.2N layer. The threading dislocation density in these layers is as low as 5×108 cm-2.</p> <div class="credits"> <p class="dwt_author">Zeimer, U.; Kueller, V.; Knauer, A.; Mogilatenko, A.; Weyers, M.; Kneissl, M.</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">286</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/286891"> <span id="translatedtitle">Selective oxidation of buried <span class="hlt">Al</span>GaAs versus <span class="hlt">Al</span>As layers</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">We report significant differences between the properties of buried oxides converted from <span class="hlt">Al</span>GaAs and <span class="hlt">Al</span>As layers using selective wet oxidation. Layers of <span class="hlt">Al</span>{sub {ital x}}Ga{sub 1{minus}{ital x}}As with {ital x}{ge}0.96 exhibit crystallographic dependent oxidation rates, while for layers with {ital x}{le}0.92 the oxidation rate is isotropic. Mesas containing partially oxidized layers of <span class="hlt">Al</span>As are unstable to rapid thermal cycling and exhibit excessive strain at the oxide terminus, while mesas containing partially oxidized layers of <span class="hlt">Al</span>GaAs are robust and lack evidence of strain. Finally, the oxidation of <span class="hlt">Al</span>GaAs layers, rather than <span class="hlt">Al</span>As, is found to provide robust oxide apertures for reliable vertical-cavity surface emitting lasers. {copyright} {ital 1996 American Institute of Physics.}</p> <div class="credits"> <p class="dwt_author">Choquette, K.D.; Geib, K.M.; Chui, H.C.; Hammons, B.E.; Hou, H.Q.; Drummond, T.J. [Photonics Research Department, Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)] [Photonics Research Department, Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States); Hull, R. [Department of Materials Science, University of Virginia, Charlottesville, Virginia 22903 (United States)] [Department of Materials Science, University of Virginia, Charlottesville, Virginia 22903 (United States)</p> <p class="dwt_publisher"></p> <p class="publishDate">1996-09-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">287</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19920074405&hterms=al2o3&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Dal2o3"> <span id="translatedtitle">Oxidation of <span class="hlt">Al</span>2O3 continuous fiber-reinforced/Ni<span class="hlt">Al</span> composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The 1200 C and 1300 C isothermal and cyclic oxidation behavior of <span class="hlt">Al</span>2O3 continuous fiber-reinforced/Ni<span class="hlt">Al</span> composites were studied. Oxidation resulted in formation of <span class="hlt">Al</span>2O3 external scales in a similar manner as scales formed on monolithic Ni<span class="hlt">Al</span>. The isothermal oxidation of an <span class="hlt">Al</span>2O3/Ni<span class="hlt">Al</span> composite resulted in oxidation of the matrix along the fiber/matrix interface near the fiber ends. This oxide acted as a wedge between the fiber and the matrix, and, under cyclic oxidation conditions, led to further oxidation along the fiber lengths and eventual cracking of the composite. The oxidation behavior of composites in which the <span class="hlt">Al</span>2O3 fibers were sputter coated with nickel prior to processing was much more severe. This was attributed to open channels around the fibers which formed during processing, most likely as a result of the diffusion of the nickel coating into the matrix.</p> <div class="credits"> <p class="dwt_author">Doychak, J.; Nesbitt, J. A.; Noebe, R. D.; Bowman, R. R.</p> <p class="dwt_publisher"></p> <p class="publishDate">1992-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">288</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/335265"> <span id="translatedtitle">The effect of an oxide dispersion on the critical <span class="hlt">Al</span> content in Fe-<span class="hlt">Al</span> alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Oxide-dispersed iron aluminides with <span class="hlt">Al</span> contents ranging from 10 to 28 at.% were oxidized in air at temperatures between 600 and 1300 C in order to determine the critical <span class="hlt">Al</span> content necessary to form a protective, external alumina scale. A Y{sub 2}O{sub 3}-<span class="hlt">Al</span>{sub 2}O{sub 3} dispersion, performed similarly to an <span class="hlt">Al</span>{sub 2}O{sub 3} dispersion, indicated little effect of Y on the critical <span class="hlt">Al</span> content. Compared to ingot-processed iron aluminides, the addition of an oxide dispersion reduced the critical <span class="hlt">Al</span> content at 900 C. This reduction is attributed to the finer grain size in the oxide-dispersed Fe-<span class="hlt">Al</span>.</p> <div class="credits"> <p class="dwt_author">Pint, B.A.; Leibowitz, J.; DeVan, J.H. [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States)</p> <p class="dwt_publisher"></p> <p class="publishDate">1999-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">289</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/22116017"> <span id="translatedtitle">Thermal diffusion in Ni/<span class="hlt">Al</span> multilayer</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Two Ni/<span class="hlt">Al</span> multilayers deposited by ion beam sputtering of nominal design [Ni(200A)/<span class="hlt">Al</span>(100A)] Multiplication-Sign 5 and [Ni(50A)/<span class="hlt">Al</span>(227A)] Multiplication-Sign 5 on Si substrates were annealed at 200 Degree-Sign C. As-deposited and annealed samples were characterized by x-ray diffraction (XRD) and x-ray reflectometry (XRR). The effort was to study the path of alloying in the above two multilayers of same elements but of opposite stoichiometric ratio. We find distinct differences in alloying of these samples.</p> <div class="credits"> <p class="dwt_author">Swain, M.; Bhattacharya, D.; Singh, S.; Basu, S. [Solid State Physics Division, Bhabha Atomic Research Center, Mumbai 400085 (India); Gupta, M. [UGC-DAE-Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452017 (India)</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-02-05</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">290</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2010JPhCS.202a2010S"> <span id="translatedtitle">Studies of astrophysically interesting nucleus 23<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">We have studied the ?-delayed proton decay of 23<span class="hlt">Al</span> with a novel detector setup at the focal plane of the MARS separator at the Texas A&M University to resolve existing controversies about the proton branching of the IAS in 23Mg and to determine the absolute proton branchings by combining our results to the latest ??-decay data. We have made also a high precision mass measurement of the ground state of 23<span class="hlt">Al</span> to establish more accurate proton separation energy of 23<span class="hlt">Al</span>. Here the description of the used techniques along with preliminary results of the experiments are given.</p> <div class="credits"> <p class="dwt_author">Saastamoinen, A.; Trache, L.; Banu, A.; Bentley, M. A.; Davinson, T.; Eronen, T.; Hardy, J. C.; Iacob, V. E.; Jenkins, D.; Jokinen, A.; McCleskey, M.; Roeder, B.; Tabacaru, G.; Tribble, R. E.; Woods, P. J.; Äystö, J.; Igisol/Mars Groups</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">291</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40506881"> <span id="translatedtitle"><span class="hlt">Al</span> 2O 3–NiCr<span class="hlt">Al</span> composites and functional gradient materials fabricated by reactive hot pressing</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary"><span class="hlt">Al</span>2O3–NiCr<span class="hlt">Al</span> composites were fabricated by mixing NiO, <span class="hlt">Al</span> and Cr powders and then reactive hot pressing. The high temperature alloy NiCr<span class="hlt">Al</span> was formed by the reaction of extra <span class="hlt">Al</span>, Cr and the Ni reduced from NiO. The <span class="hlt">Al</span>2O3–NiCr<span class="hlt">Al</span> composites with various <span class="hlt">Al</span>2O3 fractions were successfully fabricated by the proper addition of extra Ni, Cr, <span class="hlt">Al</span> or <span class="hlt">Al</span>2O3 powders. A five-layer</p> <div class="credits"> <p class="dwt_author">J. Q. Li; K. M. Gu; J. N. Tang; S. H. Xie; Y. H. Zhuang</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">292</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40361757"> <span id="translatedtitle"><span class="hlt">Al</span> 2O 3–FeCr<span class="hlt">Al</span> composites and functionally graded materials fabricated by reactive hot pressing</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary"><span class="hlt">Al</span>2O3–FeCr<span class="hlt">Al</span> composites were fabricated by mixing Fe2O3, <span class="hlt">Al</span> and Cr powders and then reactive hot pressing. The high temperature alloy FeCr<span class="hlt">Al</span> was formed by the reaction of extra <span class="hlt">Al</span>, Cr and the Fe reduced from Fe2O3. The <span class="hlt">Al</span>2O3–FeCr<span class="hlt">Al</span> composites with various <span class="hlt">Al</span>2O3 fractions were successfully fabricated by the proper addition of extra Fe, Cr, <span class="hlt">Al</span> or <span class="hlt">Al</span>2O3 powders. A five-layer</p> <div class="credits"> <p class="dwt_author">J. Q. Li; W. A. Sun; W. Q. Ao; K. M. Gu; P. Xiao</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">293</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/8718001096w31471.pdf"> <span id="translatedtitle">Separating method and dynamic processes of Nano-<span class="hlt">Al</span> 13</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">In order to investigate the characteristics of pure Nano-<span class="hlt">Al</span>13, Nano-<span class="hlt">Al</span>13 was separated and purified from a series of poly-aluminum chloride (PAC) solutions which had the same <span class="hlt">Al</span>13 percentage but different total <span class="hlt">Al</span> concentrations, by using column chromatography, ethanol-acetone resolving and SO2?\\u000a 4\\/Ba2+ displacement. The <span class="hlt">Al</span>13 species yield was characterized by <span class="hlt">Al</span>-ferron timed complexation spectrophotometry and 27<span class="hlt">Al</span>-NMR (nuclear magnetic resonance). The</p> <div class="credits"> <p class="dwt_author">Baoyu Gao; Yongbao Chu; Qinyan Yue; Chunyan Kong; Xiaona Wang</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">294</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/971365"> <span id="translatedtitle">Interdiffusion in Diffusion Couples: U-Mo v. <span class="hlt">Al</span> and <span class="hlt">Al</span>-Si</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Interdiffusion and microstructural development in the U-Mo-<span class="hlt">Al</span> system was examined using solid-tosolid diffusion couples consisting of U-7wt.%Mo, U-10wt.%Mo and U-12wt.%Mo vs. pure <span class="hlt">Al</span>, annealed at 600°C for 24 hours. The influence of Si alloying addition (up to 5 wt.%) in <span class="hlt">Al</span> on the interdiffusion microstructural development was also examined using solid-to-solid diffusion couples consisting of U-7wt.%Mo, U-10wt.%Mo and U-12wt.%Mo vs. pure <span class="hlt">Al</span>, <span class="hlt">Al</span>-2wt.%Si, and <span class="hlt">Al</span>-5wt.%Si annealed at 550°C up to 20 hours. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electron probe microanalysis (EPMA) were employed to examine the development of a very fine multiphase intermetallic layer. In ternary U-Mo-<span class="hlt">Al</span> diffusion couples annealed at 600°C for 24 hours, interdiffusion microstructure varied of finely dispersed UAl3, UAl4, U6Mo4<span class="hlt">Al</span>43, and UMo2<span class="hlt">Al</span>20 phases while the average composition throughout the interdiffusion zone remained constant at approximately 80 at.% <span class="hlt">Al</span>. Interdiffusion microstructure observed by SEM/TEM analyses and diffusion paths drawn from concentration profiles determined by EPMA appear to deviate from the assumption of “local thermodynamic equilibrium,” and suggest that interdiffusion occurs via supersaturated UAl4 followed by equilibrium transformation into UAl3, U6Mo4<span class="hlt">Al</span>43, UAl4 and UMo2<span class="hlt">Al</span>20 phases. Similar observation was made for U-Mo vs. <span class="hlt">Al</span> diffusion couples annealed at 550°C. The addition of Si (up to 5 wt.%) in <span class="hlt">Al</span> significantly reduced the thickness of the intermetallic layer by changing the constituent phases of the interdiffusion zone developed in U-Mo vs. <span class="hlt">Al</span>-Si diffusion couples. Specifically, the formation of (U,Mo)(<span class="hlt">Al</span>,Si)3 with relatively large solubility for Mo and Si, along with UMo2<span class="hlt">Al</span>20 phases was observed along with disappearance of U6Mo4<span class="hlt">Al</span>43 and UAl4 phases. Simplified understanding based on U-<span class="hlt">Al</span>, U-Si, and Mo-Si binary phase diagrams is discussed in the light of the beneficial effect of Si alloying addition.</p> <div class="credits"> <p class="dwt_author">D. D. Keiser, Jr.; E. Perez; B. Yao; Y. H. Sohn</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">295</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2012ApSS..261..567E"> <span id="translatedtitle">Effects of minor elements in <span class="hlt">Al</span> alloy on zincate pretreatment</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The effects of minor elements in <span class="hlt">Al</span> alloys on Zn deposition during double zincate pretreatment were investigated using four <span class="hlt">Al</span> alloys: <span class="hlt">Al</span> foil containing ca. 55 ppm Cu (<span class="hlt">Al</span>(Cu)), <span class="hlt">Al</span>-1%Si (<span class="hlt">Al</span>(Si)), 99.99% <span class="hlt">Al</span> (<span class="hlt">Al</span>(4N)) and 99.999% <span class="hlt">Al</span> (<span class="hlt">Al</span>(5N)). SEM images showed that a uniform Zn layer was deposited on <span class="hlt">Al</span>(Cu) and <span class="hlt">Al</span>(Si) but not on <span class="hlt">Al</span>(4N) or <span class="hlt">Al</span>(5N) after the double zincate process. Immersion potential during the zincate process indicated that the duration of substitution reaction of Zn deposition and <span class="hlt">Al</span> dissolution on <span class="hlt">Al</span>(Cu) was shorter than that on the other alloys. These results suggest that a small amount of Cu increases the efficiency of the zincate process and the density of Zn deposition. Etching pretreatment of alloys in sulfuric acid containing Cu2+ ions before zincate pretreatment dramatically improved the uniformity and efficiency of Zn deposition on <span class="hlt">Al</span>(Si) but not on <span class="hlt">Al</span>(4N) or <span class="hlt">Al</span>(5N), indicating that small and dispersed Cu particles were deposited efficiently on the <span class="hlt">Al</span>(Si) alloy and provided Zn nucleation sites. From the results, it was concluded that the activity level of native <span class="hlt">Al</span> for the zincate process is considerable low and is thus dramatically affected by alloying or surface modification with a small amount of electrochemically active elements.</p> <div class="credits"> <p class="dwt_author">Egoshi, Shinnosuke; Azumi, Kazuhisa; Konno, Hidetaka; Ebihara, Ken; Taguchi, Yoshihiro</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-11-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">296</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/19188608"> <span id="translatedtitle">Substitutional alloy of Ce and <span class="hlt">Al</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">The formation of substitutional alloys has been restricted to elements with similar atomic radii and electronegativity. Using high-pressure at 298 K, we synthesized a face-centered cubic disordered alloy of highly dissimilar elements (large Ce and small <span class="hlt">Al</span> atoms) by compressing the Ce(3)<span class="hlt">Al</span> intermetallic compound >15 GPa or the Ce(3)<span class="hlt">Al</span> metallic glass >25 GPa. Synchrotron X-ray diffraction, Ce L(3)-edge absorption spectroscopy, and ab initio calculations revealed that the pressure-induced Kondo volume collapse and 4f electron delocalization of Ce reduced the differences between Ce and <span class="hlt">Al</span> and brought them within the Hume-Rothery (HR) limit for substitutional alloying. The alloy remained after complete release of pressure, which was also accompanied by the transformation of Ce back to its ambient 4f electron localized state and reversal of the Kondo volume collapse, resulting in a non-HR alloy at ambient conditions. PMID:19188608</p> <div class="credits"> <p class="dwt_author">Zeng, Qiao-Shi; Ding, Yang; Mao, Wendy L; Luo, Wei; Blomqvist, Andreas; Ahuja, Rajeev; Yang, Wenge; Shu, Jinfu; Sinogeikin, Stas V; Meng, Yue; Brewe, Dale L; Jiang, Jian-Zhong; Mao, Ho-Kwang</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-02-24</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">297</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=ADA444823"> <span id="translatedtitle"><span class="hlt">Al</span> Qaeda: Statements and Evolving Ideology.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">Osama Bin Laden and the <span class="hlt">Al</span> Qaeda terrorist network have conducted a sophisticated public relations and media campaign over the last 10 years. Terrorism analysts believe that these messages have been designed to elicit psychological reactions and communica...</p> <div class="credits"> <p class="dwt_author">C. M. Blanchard</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">298</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2650295"> <span id="translatedtitle">Substitutional alloy of Ce and <span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p class="result-summary">The formation of substitutional alloys has been restricted to elements with similar atomic radii and electronegativity. Using high-pressure at 298 K, we synthesized a face-centered cubic disordered alloy of highly dissimilar elements (large Ce and small <span class="hlt">Al</span> atoms) by compressing the Ce3<span class="hlt">Al</span> intermetallic compound >15 GPa or the Ce3<span class="hlt">Al</span> metallic glass >25 GPa. Synchrotron X-ray diffraction, Ce L3-edge absorption spectroscopy, and ab initio calculations revealed that the pressure-induced Kondo volume collapse and 4f electron delocalization of Ce reduced the differences between Ce and <span class="hlt">Al</span> and brought them within the Hume-Rothery (HR) limit for substitutional alloying. The alloy remained after complete release of pressure, which was also accompanied by the transformation of Ce back to its ambient 4f electron localized state and reversal of the Kondo volume collapse, resulting in a non-HR alloy at ambient conditions.</p> <div class="credits"> <p class="dwt_author">Zeng, Qiao-Shi; Ding, Yang; Mao, Wendy L.; Luo, Wei; Blomqvist, Andreas; Ahuja, Rajeev; Yang, Wenge; Shu, Jinfu; Sinogeikin, Stas V.; Meng, Yue; Brewe, Dale L.; Jiang, Jian-Zhong; Mao, Ho-kwang</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">299</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/18625409"> <span id="translatedtitle">Glial cells in <span class="hlt">ALS</span>: the missing link?</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Amyotrophic lateral sclerosis (<span class="hlt">ALS</span>) was initially known as Charcot's sclerosis, named after the French neurobiologist and physician Jean-Martin Charcot who first described this type of muscular atrophy in the early nineteenth century. In the United States, <span class="hlt">ALS</span> became widely known as Lou Gehrig's disease after the famous baseball player who succumbed to the disease in the late 1930s. Currently, <span class="hlt">ALS</span> is the most common motor neuron disease, with a worldwide incidence of 8 cases per 100,000 population per year. Familial forms constitute approximately 5% to 10% of all cases. Onset increases with age, with a peak in the seventh decade and a slight preponderance (relative risk, 1.3-1.5) among men compared with women. Rapid progression of motor neuron loss leads to death an average of 3 to 5 years after symptom onset. The cause of <span class="hlt">ALS</span> remains unknown and there is still no curative therapy. PMID:18625409</p> <div class="credits"> <p class="dwt_author">Raibon, Elsa; Todd, Lisa Marie; Möller, Thomas</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">300</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/1987E%26PSL..82..223E"> <span id="translatedtitle"><span class="hlt">Al</span>-26 survey of Antarctic meteorites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">An <span class="hlt">Al</span>-26 survey by nondestructive gamma ray spectrometry was conducted as part of the preliminary examination effort for Antarctic meteorites. A total of 220 samples were studied. The majority of the samples were from the Allan Hills area; however, samples from several other sites, including the Yamato Mountains, were studied. Compared to worldwide falls and finds, the Antarctic group shows a clear trend toward lower <span class="hlt">Al</span>-26 levels. At least 10 percent of the samples studied were clearly undersaturated in <span class="hlt">Al</span>-26. The frequency of undersaturated samples suggests that terrestrial ages of several hundred thousand years are common among the Antarctic meteorite collection. The absence of samples with extremely low <span class="hlt">Al</span>-26 implies that the upper limit for terrestrial ages in the Antarctic is on the order of 1 million years.</p> <div class="credits"> <p class="dwt_author">Evans, J. C.; Reeves, J. H.</p> <p class="dwt_publisher"></p> <p class="publishDate">1987-04-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_14");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' 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onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">301</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/1048882"> <span id="translatedtitle">Western Baldwin County, <span class="hlt">AL</span> Grid Interconnection Project</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">The Objective of this Project was to provide an additional supply of electricity to the affected portions of Baldwin County, <span class="hlt">AL</span> through the purchase, installation, and operation of certain substation equipment.</p> <div class="credits"> <p class="dwt_author">Thomas DeBell</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-09-30</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">302</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3866720"> <span id="translatedtitle"><span class="hlt">ALS</span> and Oxidative Stress: The Neurovascular Scenario</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p class="result-summary">Oxidative stress and angiogenic factors have been placed as the prime focus of scientific investigations after an establishment of link between vascular endothelial growth factor promoter (VEGF), hypoxia, and amyotrophic lateral sclerosis (<span class="hlt">ALS</span>) pathogenesis. Deletion of the hypoxia-response element in the vascular endothelial growth factor promoter and mutant superoxide dismutase 1 (SOD1) which are characterised by atrophy and muscle weakness resulted in phenotype resembling human <span class="hlt">ALS</span> in mice. This results in lower motor neurodegeneration thus establishing an important link between motor neuron degeneration, vasculature, and angiogenic molecules. In this review, we have presented human, animal, and in vitro studies which suggest that molecules like VEGF have a therapeutic, diagnostic, and prognostic potential in <span class="hlt">ALS</span>. Involvement of vascular growth factors and hypoxia response elements also highlights the converging role of oxidative stress and neurovascular network for understanding and treatment of various neurodegenerative disorders like <span class="hlt">ALS</span>.</p> <div class="credits"> <p class="dwt_author">Thakur, Keshav; Gupta, Pawan Kumar</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">303</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=ADA585745"> <span id="translatedtitle">Protein Aggregation Inhibitors for <span class="hlt">ALS</span> Therapy.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">Amyotrophic lateral sclerosis (<span class="hlt">ALS</span>) is a fatal neurodegenerative disease characterized by progressive loss of motor neurons, leading to death within 3-5 years. Gulf War veterans, and military personnel in general, exhibit a significant increased risk of d...</p> <div class="credits"> <p class="dwt_author">B. Diamond D. R. Kirsch R. B. Silverman R. I. Morimoto R. J. Ferrante</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">304</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/10175632"> <span id="translatedtitle">Performance of the <span class="hlt">ALS</span> injection system</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">The authors started commissioning the Advanced Light Source (<span class="hlt">ALS</span>) storage ring on January 11, 1993. The stored beam reached 60 mA on March 24, 1993 and 407 mA on April 9, 1993. The fast pace of storage ring commissioning can be attributed partially to the robust injection system. In this paper they describe the operating characteristics of the <span class="hlt">ALS</span> injection system.</p> <div class="credits"> <p class="dwt_author">Kim, C.H.</p> <p class="dwt_publisher"></p> <p class="publishDate">1993-05-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">305</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/862324"> <span id="translatedtitle">17th Annual <span class="hlt">ALS</span> Users' Association Meeting</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">It's not exactly Russian roulette, but scheduling October events outdoors is not risk-free, even in usually sunny California. An overflow crowd of more than 400 registered users, <span class="hlt">ALS</span> staff, and vendors enjoyed a full indoor program featuring science highlights and workshops spread over two and a half days from October 18 to October 20. However, a major storm, heralding the onset of the San Francisco Bay Area rainy season, posed a few weather challenges for the events on the <span class="hlt">ALS</span> patio.</p> <div class="credits"> <p class="dwt_author">Robinson, Art; Tamura, Lori</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-11-29</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">306</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/53403026"> <span id="translatedtitle">Atomic data for <span class="hlt">Al</span> ions (Palmeri+, 2011)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Computed level energies, wavelengths, radiative transition probabilities, absorption oscillator strengths, radiative and Auger widths, and K-shell fluorescence yields in <span class="hlt">Al</span>0-<span class="hlt">Al</span>11+ are given in these two tables. In Table 14 levels are identified by the electron number (N), the level index, the spin multiplicity, the total orbital angular momentum quantum number, the total angular momentum quantum number and the electronic configuration.</p> <div class="credits"> <p class="dwt_author">P. Palmeri; P. Quinet; C. Mendoza; M. A. Bautista; J. Garcia; M. C. Witthoeft; T. R. Kallman</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">307</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2011AIPC.1349.1191N"> <span id="translatedtitle">Magnetic Properties of Disordered Fe3<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The magnetic properties of Fe3<span class="hlt">Al</span> powders prepared by filing the ingot in both as-filed and annealed form are studied. Results of Mössbauer, X-ray diffraction and DC magnetization studies show that the magnetic properties are modified due to formation of non-magnetic Fe3<span class="hlt">Al</span>C0.5 phase due to C intercalated on filing. The hyperfine fields obtained are explained in terms of nearest and next nearest neighbor configurations of 57Fe.</p> <div class="credits"> <p class="dwt_author">Nehra, J.; Kabra, K.; Jani, S.; Ranjith, P. M.; Lakshmi, N.; Venugopalan, K.</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-07-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">308</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2012AIPC.1426..275Z"> <span id="translatedtitle">Air blast characteristics of laminated <span class="hlt">al</span> and NI-<span class="hlt">AL</span> casings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Air blast characteristics of <span class="hlt">Al</span> and Ni-<span class="hlt">Al</span> laminated materials were experimentally investigated in a 23 m3 closed chamber. Ni and <span class="hlt">Al</span> foils, 50 to 100 micrometers in thickness, were rolled and compacted to form a cylindrical casing with a density of 95% TMD through an explosive formation technique. Charges were prepared using 2 kg C4 explosive packed in the laminated casing to a metal-explosive mass ratio of 1.75. The blast pressure history measured on the chamber wall showed a double-shock front structure with a precursor shock followed by the primary blast. The front peak pressure for the Ni-<span class="hlt">Al</span> cased charge reaches 1.5-2 times that of the <span class="hlt">Al</span> cased, consistent with the larger fireball recorded for the Ni-<span class="hlt">Al</span> cased. The long time quasi-static explosion pressure (QSP) from the Ni- <span class="hlt">Al</span> cased charge is 0.8 of that of the <span class="hlt">Al</span> cased, due to half of <span class="hlt">Al</span> mass in the Ni-<span class="hlt">Al</span>.</p> <div class="credits"> <p class="dwt_author">Zhang, Fan; Ripley, Robert; Wilson, William</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-03-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">309</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/1993CPL...212...37S"> <span id="translatedtitle">XPS-XAES study of charge transfers at Ni/<span class="hlt">Al</span> 2O 3/<span class="hlt">Al</span> systems</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The chemical shift found for nickel core levels indicates the transfer of electrons from the <span class="hlt">Al</span> 2O 3 oxide to deposited Ni. This process creates the Ni/<span class="hlt">Al</span> 2O 3 surface dipoles, the electric field of which attracts free electrons from elemental <span class="hlt">Al</span> towards the sample surface. Filling <span class="hlt">Al</span> 2O 3/<span class="hlt">Al</span> interface states with these electrons increases the barrier height. With increasing oxide thickness from 1.5 to 3.2 nm, the magnitude of this effect decreases while the amount of the transferred charge at Ni/<span class="hlt">Al</span> 2O 3 remains unchanged. For oxide thicknesses from 1.8 to 2.5 nm, UHV annealing of the Ni/<span class="hlt">Al</span> 2O 3/<span class="hlt">Al</span> systems, with Ni deposits thicker than the effective amount of 2.5 ML, causes the formation of a Ni<span class="hlt">Al</span> alloy via interdiffusion through the oxide defects, whereas the thinner Ni deposits persist on the <span class="hlt">Al</span> 2O 3 surface.</p> <div class="credits"> <p class="dwt_author"><Img>Arapatka, T. J.</p> <p class="dwt_publisher"></p> <p class="publishDate">1993-09-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">310</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2008STAdM...9c5005Y"> <span id="translatedtitle">Formation of <span class="hlt">Al</span>3Ti/Mg composite by powder metallurgy of Mg <span class="hlt">Al</span> Ti system</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">An in situ titanium trialuminide (<span class="hlt">Al</span>3Ti)-particle-reinforced magnesium matrix composite has been successfully fabricated by the powder metallurgy of a Mg-<span class="hlt">Al</span>-Ti system. The reaction processes and formation mechanism for synthesizing the composite were studied by differential scanning calorimetry (DSC), x-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS). <span class="hlt">Al</span>3Ti particles are found to be synthesized in situ in the Mg alloy matrix. During the reaction sintering of the Mg-<span class="hlt">Al</span>-Ti system, <span class="hlt">Al</span>3Ti particles are formed through the reaction of liquid <span class="hlt">Al</span> with as-dissolved Ti around the Ti particles. The formed intermetallic particles accumulate at the original sites of the Ti particles. As sintering time increases, the accumulated intermetallic particles disperse and reach a relatively homogeneous distribution in the matrix. It is found that the reaction process of the Mg-<span class="hlt">Al</span>-Ti system is almost the same as that of the <span class="hlt">Al</span>-Ti system. Mg also acts as a catalytic agent and a diluent in the reactions and shifts the reactions of <span class="hlt">Al</span> and Ti to lower temperatures. An additional amount of <span class="hlt">Al</span> is required for eliminating residual Ti and solid-solution strengthening of the Mg matrix.</p> <div class="credits"> <p class="dwt_author">Yang, Zi R.; Wang, Shu Qi; Cui, Xiang H.; Zhao, Yu T.; Gao, Ming J.; Wei, Min X.</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-07-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">311</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2005JCrGr.275E.147F"> <span id="translatedtitle">Growth and characterization of the Ni<span class="hlt">Al-NiAl</span>Nb eutectic structure</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Despite presenting potential as high-temperature structural material, the Ni<span class="hlt">Al</span> intermetallic compound cannot be easily employed due to its low room temperature fracture toughness and poor creep strength. A solution for such a problem is combining such a compound with other phase using a eutectic transformation, as in the case of the Ni<span class="hlt">Al-NiAl</span>Nb eutectic structure. In this study, several samples containing Ni, <span class="hlt">Al</span> and Nb were arc melted in order to evaluate the eutectic composition of this transformation, as well as the temperature at which it occurs. The resulting phases were the B2 Ni<span class="hlt">Al</span> and the Laves phase Ni<span class="hlt">Al</span>Nb. It was found that the eutectic alloy occurs close to 16.0 at% Nb and the eutectic transformation temperature is 1487 °C. The amount of Ni<span class="hlt">Al</span> phase clearly decreases when the Nb content is raised. Thus, hypoeutectic alloys present Ni<span class="hlt">Al</span> dendrites with Ni<span class="hlt">Al</span>Nb precipitated at the grain boundaries while hypereutectic alloys present primary dendrites of Ni<span class="hlt">Al</span>Nb. The eutectic alloy was directionally solidified at growth rates varying from 5.0 to 50.0 mm/h. As expected, the lamellar spacing was found to decrease as the growth rate was increased.</p> <div class="credits"> <p class="dwt_author">Ferrandini, P. L.; Araujo, F. L. G. U.; Batista, W. W.; Caram, R.</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">312</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/516447"> <span id="translatedtitle">Modeling of precipitation in <span class="hlt">Al</span> alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Objective was the development of a computational model of precipitation from a supersaturated alloy solid solution. The model is based on the formalism of chemical-reaction-rate theory combined with classical descriptions of precipitate thermodynamic properties and a mean-field treatment of diffusion-limited growht and coarsening. For the case of precipitation of <span class="hlt">Al</span>{sub 3}Sc in supersaturated <span class="hlt">Al</span>-Sc alloys, it is demonstrated how the model can be used to calculate number densities and size distributions of precipitates as a function of aging time and temperature, including effects of continuous cooling and thermally generated point defects. Application of the model to a specific alloy system requires knowledge of diffusion data, point defect energetics, and thermodynamic properties for bulk phases and interphase interfaces. For interfaces and point defects, thermodynamic data can be difficult to measure and reliable values of defect free energies are often unavailable. For this reason, part of the efforts were devoted to applying semiempirical and first-principles atomistic techniques to the calculation of interfacial and point-defect thermodynamic properties. This report discusses applications for interphase interfaces in the <span class="hlt">Al</span>-Ag, <span class="hlt">Al</span>-Sc, and <span class="hlt">Al</span>-Li alloy systems. We also describe atomistic work aimed at understanding the energetics of vacancy clusters in <span class="hlt">Al</span>. These clusters serve as sinks for isolated vacancies during aging and their growth can lead to more complex defects, such as dislocation loops, that act as heterogeneous nucleation sites.</p> <div class="credits"> <p class="dwt_author">Asta, M.; Foiles, S.M.; Wolfer, W.G. [Sandia National Labs., Livermore, CA (United States)] [and others</p> <p class="dwt_publisher"></p> <p class="publishDate">1996-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">313</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013JIEIC..94...93S"> <span id="translatedtitle">Process Capability Analysis of Vacuum Moulding for Development of <span class="hlt">Al-Al</span>2O3 MMC</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The purpose of the present study is to investigate process capability of vacuum moulding (VM) for development of <span class="hlt">Al-Al</span>2O3 metal matrix composite (MMC). Starting from the identification of component, prototypes were prepared (with three different input parameters namely: vacuum pressure; component volume and sand grit size to give output in form of dimensional accuracy). Measurements on the coordinate measuring machine helped in calculating the dimensional tolerances of the <span class="hlt">Al-Al</span>2O3 MMC prepared. Some important mechanical properties were also compared to verify the suitability of the components. Final components produced are acceptable as per ISO standard UNI EN 20286-I (1995). The results of study suggest that VM process lies in ±4.5 sigma (?) limit as regard to dimensional accuracy of <span class="hlt">Al-Al</span>2O3 MMC is concerned. This process ensures rapid production of pre-series technological prototypes and proof of concept at less production cost and time.</p> <div class="credits"> <p class="dwt_author">Singh, R.</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">314</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2001JPCM...13.5387S"> <span id="translatedtitle">?-phase formation in Ni<span class="hlt">Al</span> and Ni2<span class="hlt">Al</span> alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The phase stability of bcc-like Ni<span class="hlt">Al</span> and Ni2<span class="hlt">Al</span> with respect to phase transformations into the ? phase is examined by first-principles, full-potential, linear muffin-tin orbital method (FPLMTO), band-structure calculations. In agreement with experiment we find that bcc-like Ni<span class="hlt">Al</span> is stable, whereas Ni2<span class="hlt">Al</span> is unstable. We have also performed some calculations in slightly disordered phases, and find that the disordering tends to inhibit the transformation. This supports the suggestion that a combined displacive/ordering transformation mechanism is involved in the phase transformations of the Ni2<span class="hlt">Al</span> system. Calculated lattice parameters and the degree of internal shuffling of atoms for the ordered Ni2<span class="hlt">Al</span> phase were found to be in excellent agreement with the experiment</p> <div class="credits"> <p class="dwt_author">Sanati, M.; Albers, R. C.; Pinski, F. J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">315</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19920049226&hterms=al2o3&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D40%26Ntt%3Dal2o3"> <span id="translatedtitle">Protective <span class="hlt">Al</span>2O3 scale formation on Nb<span class="hlt">Al</span>3-base alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The oxidation of Nb<span class="hlt">Al</span>3 with additions of Cr and Y was studied to determine the mechanisms of the beneficial effects of these elements upon oxidation. Cr additions to the binary Nb<span class="hlt">Al</span>3 alloy of up to 6.8 at. percent reduced the scale growth rates and promoted alpha-<span class="hlt">Al</span>2O3 formation over much longer times relative to binary Nb<span class="hlt">Al</span>3. A major effect of Cr is to form a layer of <span class="hlt">Al</span>NbCr at the metal/scale interface, which is inherently more oxidation-resistant than the matrix alloy in the long term. Yttrium additions to a Cr-containing alloy improved the scale growth rate and adherence and changed the scale microstructure to mimic that of a typical protective <span class="hlt">Al</span>2O3 scale.</p> <div class="credits"> <p class="dwt_author">Doychak, J.; Hebsur, M. G.</p> <p class="dwt_publisher"></p> <p class="publishDate">1991-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">316</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/521616"> <span id="translatedtitle">Mechanical properties of Ni{sub 3}<span class="hlt">Al</span> and Fe<span class="hlt">Al</span>: Recent developments</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Recent developments in the understanding of the ductility and fracture behavior of Ni{sub 3}<span class="hlt">Al</span> and Fe<span class="hlt">Al</span> are reviewed. Both intrinsic factors (e.g., alloy stoichiometry), and extrinsic factors (e.g., environment) have been shown to affect their mechanical properties. Of all the recent developments, perhaps the most significant is the realization that Ni{sub 3}<span class="hlt">Al</span> and Fe<span class="hlt">Al</span> are intrinsically ductile (at least on the <span class="hlt">Al</span>-deficient side of stoichiometry); their brittleness when tested in ambient air is due mainly to environmental embrittlement. Another intriguing discovery is that boron embrittles Ni{sub 3}<span class="hlt">Al</span> in gaseous hydrogen (until recently, B was though to have only beneficial, or at most neutral, effects). The authors review these and other recent discoveries and discuss, wherever possible, the underlying physical mechanisms giving rise to the observed mechanical behavior.</p> <div class="credits"> <p class="dwt_author">George, E.P.; Liu, C.T. [Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.</p> <p class="dwt_publisher"></p> <p class="publishDate">1997-08-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">317</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.gpo.gov:80/fdsys/pkg/FR-2012-12-11/pdf/2012-29870.pdf"> <span id="translatedtitle">77 FR 73732 - In the Matter of Amendment of the Designation of <span class="hlt">al</span>-Qa'ida in Iraq, aka Jam'at <span class="hlt">al</span> Tawhid wa'<span class="hlt">al</span>...</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013</a></p> <p class="result-summary">...aka The Monotheism and Jihad Group, aka The <span class="hlt">al</span>-Zarqawi Network...Two Rivers, aka <span class="hlt">al</span>- Qaida Group of Jihad in Iraq, aka <span class="hlt">al</span>-Qaida Group of Jihad in the Land of the...<span class="hlt">al</span> Raafidaini, as a Foreign Terrorist Organization pursuant to...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2012-12-11</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">318</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/26495778"> <span id="translatedtitle">Structure and mechanical properties of Ni<span class="hlt">Al</span> and Ni 3<span class="hlt">Al</span>-based alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The investigation of Ni–<span class="hlt">Al</span>–Fe–Ti–B alloys was carried out to determine the influence of iron and small titanium and boron additions on the phase composition, microstructure and mechanical characteristic, particularly with respect to high-temperature deformation conditions. These alloys, containing <span class="hlt">Al</span> 35.8 at% and Fe 3.6–8.6–17.6 at% were prepared from high-purity components and <span class="hlt">Al</span> master alloy containing Ti2B particles. The influence of</p> <div class="credits"> <p class="dwt_author">Tomasz Czeppe; Stanislaw Wierzbinski</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">319</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/60686134"> <span id="translatedtitle">Magnetization anomaly of Nb3<span class="hlt">Al</span> strands and instability of Nb3<span class="hlt">Al</span> Rutherford cables</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Using a Cu stabilized Nb<span class="hlt">Al</span> strand with Nb matrix, a 30 meter long Nb<span class="hlt">Al</span> Rutherford cable was made by a collaboration of Fermilab and NIMS. Recently the strand and cable were tested. In both cases instability was observed at around 1.5 Tesla. The magnetization of this Nb<span class="hlt">Al</span> strand was measured first using a balanced coil magnetometer at 4.2 K. Strands</p> <div class="credits"> <p class="dwt_author">Ryuji Yamada; Akihiro Kikuchi; Masayoshi Wake</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">320</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013JPhCS.461a2017B"> <span id="translatedtitle">Mechanism of charge transport in Si/<span class="hlt">Al</span>2O3/<span class="hlt">Al</span> structures</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The investigation of current - voltage characteristics of structures Si/<span class="hlt">Al</span>2O3/<span class="hlt">Al</span> on the basis of aluminium oxide layers obtained by a method atomic layer deposition is carried out. It is established, that the possible mechanism of charge transport in structure is the space charge limited currents. The charge carrier concentration (Nt), concentration of traps (n0) and electron mobility (?) in <span class="hlt">Al</span>2O3 layer are calculated.</p> <div class="credits"> <p class="dwt_author">Borisova, T. M.; Castro, <author >R. A.</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-08-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_15");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' 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onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">321</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40062772"> <span id="translatedtitle">Role of <span class="hlt">Al</span> 2 O 3 particulate reinforcements on precipitation in 2014 <span class="hlt">Al</span>-matrix composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Precipitation in commercial aluminum alloy 2014, without and with alumina particulate reinforcements, was studied using microhardness,\\u000a electrical resistivity, differential scanning calorimetry (DSC), and transmission electron microscopy. The precipitation sequence\\u000a in 2014 <span class="hlt">Al</span> was confirmed to be ?ss?? + GPZ ?? + ?’?a + ?’ + gH?? + ? (<span class="hlt">Al</span>CuMgSi) + ? (Cu<span class="hlt">Al</span>2). Reinforcement addition decreased the time to peak hardness,</p> <div class="credits"> <p class="dwt_author">I. Dutta; C. P. Harper; G. Dutta</p> <p class="dwt_publisher"></p> <p class="publishDate">1994-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">322</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2014RJPCA..88..729S"> <span id="translatedtitle">Thermodynamic properties of alloys of the <span class="hlt">Al</span>-Co and <span class="hlt">Al</span>-Co-Sc systems</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Enthalpies of mixing for melts of the binary <span class="hlt">Al</span>-Co system at 1870 K in the range 0 < x Co < 0.25, and at 1620 K, 0 < x Co < 0.12, are investigated by means of isoperibolic calorimetry. Enthalpies of mixing for melts of the ternary <span class="hlt">Al</span>-Co-Sc system are investigated at 1870 K for sections <span class="hlt">Al</span>0.75(1 - x)Co0.25(1 - x)Sc x , 0 < x < 0.024, and <span class="hlt">Al</span>0.88(1 - x)Co0.12(1 - x)Sc x , 0 < x < 0.044. Using the literature data on the enthalpies of mixing for liquid and solid alloys, the activities of melt components, and the phase diagram of the <span class="hlt">Al</span>-Co system, the thermodynamic properties of liquid and solid alloys of the <span class="hlt">Al</span>-Co system over a wide range of temperatures and compositions are calculated using a software package of our own design, based on the model of ideal associated solutions (IAS). The enthalpies of mixing and the liquidus surface of the phase diagram of the ternary <span class="hlt">Al</span>-Co-Sc system over the interval of concentrations are estimated by modeling with data on binary boundary subsystems. All of the components of both the binary <span class="hlt">Al</span>-Co and ternary <span class="hlt">Al</span>-Co-Sc systems tend to interact with one another quite strongly: ? H min(<span class="hlt">Al</span>-Co) = -32.5 kJ/mol at x Co = 0.44; ? H min(<span class="hlt">Al</span>-Co-Sc) = -46 kJ/mol for <span class="hlt">Al</span>0.4Co0.3Sc0.3 (estimated).</p> <div class="credits"> <p class="dwt_author">Shevchenko, M. A.; Berezutskii, V. V.; Ivanov, M. I.; Kudin, V. G.; Sudavtsova, V. S.</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-05-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">323</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/42426354"> <span id="translatedtitle">Immobilization of Zinc and Cadmium in Polluted Soils by Polynuclear <span class="hlt">Al</span>13 and <span class="hlt">Al</span>-Montmorillonite</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">We investigated the suitability of two aluminum-based binding agents, polynuclear <span class="hlt">Al</span>13 and <span class="hlt">Al</span>-coated montmorillonite (<span class="hlt">Al</span>-mont-morillonite), for the immobilization of heavy metals in two contaminated agricultural soils: a loamy luvisol from an arable site in Rafz, Canton Zürich, Switzerland, and a sandy podsol from Szopienice, Upper Silesia, Poland. Both soils were polluted by lead, zinc, and cadmium: the soil from Szopienice</p> <div class="credits"> <p class="dwt_author">Aleksandra Badora; Gerhard Furrer; Anna Grünwald; Rainer Schulin</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">324</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/56390244"> <span id="translatedtitle">Formation of <span class="hlt">Al</span>3Ti\\/Mg composite by powder metallurgy of Mg <span class="hlt">Al</span> Ti system</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">An in situ titanium trialuminide (<span class="hlt">Al</span>3Ti)-particle-reinforced magnesium matrix composite has been successfully fabricated by the powder metallurgy of a Mg-<span class="hlt">Al</span>-Ti system. The reaction processes and formation mechanism for synthesizing the composite were studied by differential scanning calorimetry (DSC), x-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS). <span class="hlt">Al</span>3Ti particles are found to be synthesized in situ in</p> <div class="credits"> <p class="dwt_author">Zi R. Yang; Shu Qi Wang; Xiang H. Cui; Yu T. Zhao; Ming J. Gao; Min X. Wei</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">325</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/53407499"> <span id="translatedtitle">Reaction diffusion in the NiCr<span class="hlt">Al</span> and CoCr<span class="hlt">Al</span> systems</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The oxidation life of a physically vapor-deposited overlay protective coating based on the Ni-Cr-<span class="hlt">Al</span> or Co-Cr-<span class="hlt">Al</span> (M-Cr-<span class="hlt">Al</span>) systems is controlled by aluminum consumption resulting from alumina spalling, erosion, and interdiffusion with the substrate. The rates of these processes are determined by coating and substrate composition, service environment, and temperature. The purposes of this study were 1) to determine the effect</p> <div class="credits"> <p class="dwt_author">Stanley R. Le Vine</p> <p class="dwt_publisher"></p> <p class="publishDate">1978-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">326</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/2742nnn6226t7x87.pdf"> <span id="translatedtitle">Reaction diffusion in the NiCr<span class="hlt">Al</span> and CoCr<span class="hlt">Al</span> systems</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The oxidation life of a physically vapor-deposited overlay protective coating based on the Ni-Cr-<span class="hlt">Al</span> or Co-Cr-<span class="hlt">Al</span> (M-Cr-<span class="hlt">Al</span>)\\u000a systems is controlled by aluminum consumption resulting from alumina spalling, erosion, and interdiffusion with the substrate.\\u000a The rates of these processes are determined by coating and substrate composition, service environment, and temperature. The\\u000a purposes of this study were 1) to determine the effect</p> <div class="credits"> <p class="dwt_author">Stanley R. Le Vine</p> <p class="dwt_publisher"></p> <p class="publishDate">1978-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">327</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2005JCrGr.275E.395K"> <span id="translatedtitle">Synthesis and characterization of <span class="hlt">Al</span>N-like Li 3<span class="hlt">Al</span>N 2</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Li 3<span class="hlt">Al</span>N 2 can be viewed as the assemblage of eight hypothetical zincblende-like sublattices (Li 0.5<span class="hlt">Al</span> 0.5N) - partially filled with He-like Li + interstitials at the empty tetrahedral sites. Li 3<span class="hlt">Al</span>N 2 is synthesized by direct reaction between Li 3N (powder, 99.5% pure) and <span class="hlt">Al</span> (wire, 99.999% pure) with the molar ratio Li 3N:<span class="hlt">Al</span> of 1:1. The reaction is performed under N 2 pressure of 700 Torr after the evacuation to 10 -3 Torr. Typical reaction temperature and time are 1023 K and 5 h, respectively. The synthesized compounds are confirmed to be a single phase of Li 3<span class="hlt">Al</span>N 2 (space group: Ia3) with lattice parameter 9.427 Å by a powder X-ray diffraction method. Twelve Raman peaks are observed, although the factor group analysis for Li 3<span class="hlt">Al</span>N 2 allows eight peaks (Raman active modes: A g+2E 1g+2E 2g+3F g), indicating that the rest four peaks originate from the decrease in the lattice symmetry due to the distortion between <span class="hlt">Al</span> and N bonds. With the reaction temperature above 1273 K, wurtzite-<span class="hlt">Al</span>N is synthesized instead of Li 3<span class="hlt">Al</span>N 2, which results from the extreme vaporization of lithium and nitrogen from Li-<span class="hlt">Al</span>-N matrix. The band gap of Li 3<span class="hlt">Al</span>N 2 evaluated using optical absorption and photoacoustic spectroscopy methods is ˜4.4 eV.</p> <div class="credits"> <p class="dwt_author">Kuriyama, K.; Kaneko, Y.; Kushida, K.</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">328</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/203536"> <span id="translatedtitle">Synthesis of <span class="hlt">Al</span>{sub 2}O{sub 3}-<span class="hlt">Al</span> composites by reactive metal penetration</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Ceramic-metal composites have been made to near net-shape by reactive penetration of dense ceramic preforms by molten <span class="hlt">Al</span>. Ceramic-metal composite formation by reactive metal penetration is driven by a strongly negative Gibbs energy for reaction. For <span class="hlt">Al</span>, the general form of the reaction is (x + 2)<span class="hlt">Al</span> + (3/y)MO{sub y} {yields} <span class="hlt">Al</span>{sub 2}O{sub 3} + M{sub 3/y}<span class="hlt">Al</span>{sub x}, where MO{sub y} is an oxide that is wet by molten <span class="hlt">Al</span>. In low P{sub O{sub 2}} atmospheres and at temperatures above about 900 C, molten <span class="hlt">Al</span> reduces mullite to produce <span class="hlt">Al</span>{sub 2}O{sub 3} and silicon. The <span class="hlt">Al</span>/mullite reaction has a {Delta}G{degree}{sub r} (1,200 K) of {minus}1,014 kJ/mol and, if the mullite is fully dense, the theoretical volume change on reaction is less than 1%. Experiments with commercial mullite containing a silicate grain boundary phase average less than 2% volume change on reaction. In the <span class="hlt">Al</span>/mullite system, reactive metal penetration produces a fine-grained alumina skeleton with an interspersed metal phase. With enough excess aluminum, mutually interpenetrating ceramic-metal composites are produced. Properties measurements show that ceramic-metal composites produced by reactive metal penetration of mullite by <span class="hlt">Al</span> have a Young`s modulus and hardness similar to that of <span class="hlt">Al</span>{sub 2}O{sub 3}, with improved fracture toughness ranging from5 to 9 MPa {center_dot} m{sup 1/2}. For penetration times less than 1 h, reaction layer thickness varies as the square root of time, which allows ceramic-metal composite coatings to be fabricated by controlling the penetration time.</p> <div class="credits"> <p class="dwt_author">Loehman, R.E.; Ewsuk, K. [Sandia National Labs., Albuquerque, NM (United States). Advanced Materials Lab.; Tomsia, A.P. [Pask Research and Engineering, Berkeley, CA (United States)</p> <p class="dwt_publisher"></p> <p class="publishDate">1996-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">329</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19990008594&hterms=tantalum+coating&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dtantalum%2Bcoating"> <span id="translatedtitle">Two-Phase (Ti<span class="hlt">Al+TiCrAl</span>) Coating Alloys for Titanium Aluminides</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">A coating for protecting titanium aluminide alloys, including the Ti<span class="hlt">Al</span> gamma + Ti3<span class="hlt">Al</span> (alpha(sub 2)) class, from oxidative attack and interstitial embrittlement at temperatures up to at least 1000 C. is disclosed. This protective coating consists essentially of titanium, aluminum. and chromium in the following approximate atomic ratio: Ti(41.5-34.5)<span class="hlt">Al</span>(49-53)Cr(9.5-12.5)</p> <div class="credits"> <p class="dwt_author">Brady, Michael P. (Inventor); Smialek, James L. (Inventor); Brindley, William J. (Inventor)</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">330</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40940935"> <span id="translatedtitle">Investigation of intermetallics in hypoeutectic <span class="hlt">Al</span>–Fe alloys by dissolution of the <span class="hlt">Al</span> matrix</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">During the non-equilibrium solidification typical of DC (direct chill) castings a range of cooling rates occur from the surface to the casting center, and can cause the formation of metastable intermetallic phases (AlmFe, <span class="hlt">Al</span>6Fe, etc.) in addition to the stable <span class="hlt">Al</span>3Fe phase. The extensive presence of the plate-like <span class="hlt">Al</span>3Fe phase in the as-cast structure adversely influences the mechanical properties of</p> <div class="credits"> <p class="dwt_author">Pedro R. Goulart; Valentim B. Lazarine; Claudenete V. Leal; José E. Spinelli; Noé Cheung; Amauri Garcia</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">331</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2014SurSc.624....1L"> <span id="translatedtitle">First-principle study of adhesion, wetting and bonding on <span class="hlt">Al/Al</span>3V(001) interface</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The adhesion, wetting, and bonding on fcc-<span class="hlt">Al</span>(001)/D022-<span class="hlt">Al</span>3V(001) interface were investigated using density functional calculations. Considering different terminations of <span class="hlt">Al</span>3V(001) (<span class="hlt">Al</span>- and <span class="hlt">Al</span> + V-terminated) and stacking sites (center-, hollow- and top-sites), six <span class="hlt">Al/Al</span>3V(001) models were calculated. For the models with same stacking site, <span class="hlt">Al</span> + V-terminated model has larger work of adhesion (Wad) than the <span class="hlt">Al</span>-terminated one. For the models with same termination, the work of adhesion decreases, and the interface energy (?int) increases as the order of top-, bridge- and center-sites. <span class="hlt">Al</span>-terminated-center-sited and <span class="hlt">Al</span> + V-terminated-center-sited models are more stable among six models. After complete structure relaxation, both models have the same epitaxial stacking style. Therefore, the both models can be regarded as of the same and most stable one (noted as CSI model), but separating along <span class="hlt">Al-Al</span> and <span class="hlt">Al-Al</span>+V inter-planes. Based on the perfect wetting and strong adhesion in CSI model, the heterogeneous nucleation of ?-<span class="hlt">Al</span> on <span class="hlt">Al</span>3V(001) was interpreted in terms of crystallography and thermodynamics. The interfacial bonding was discussed with analysis of valence electron density distribution and partial density of states (PDOS). The bonding is mainly contributed from <span class="hlt">Al</span>V covalent bonds and <span class="hlt">AlAl</span> metallic interactions.</p> <div class="credits"> <p class="dwt_author">Li, Jian; Qi, Yuning; Zhang, Ming; Zhou, Yong; Li, Xiao</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">332</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2009ApPhL..95z1901W"> <span id="translatedtitle">Fast reaction mechanism of a core(<span class="hlt">Al</span>)-shell (<span class="hlt">Al</span>2O3) nanoparticle in oxygen</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Atomistic mechanisms of oxidation in a laser flash heated core (Aluminum)-shell (Alumina) nanoparticle are investigated using multimillion-atom molecular dynamics simulations. We find a thermal-to-mechanochemical transition of oxidation mechanism when the initial core temperature is above 6000 K. The transition from thermal diffusion to mechanically enhanced diffusion to ballistic transport is accompanied by a change in the intermediate reaction products from <span class="hlt">Al</span> rich <span class="hlt">Al</span>2O to oxygen rich <span class="hlt">Al</span>O2 clusters. Higher initial temperature of the core causes catastrophic failure of the shell, which provides direct oxidation pathways for core <span class="hlt">Al</span>, resulting in faster energy release.</p> <div class="credits"> <p class="dwt_author">Wang, Weiqiang; Clark, Richard; Nakano, Aiichiro; Kalia, Rajiv K.; Vashishta, Priya</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">333</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/mr1101032582824l.pdf"> <span id="translatedtitle">Deoxidation equilibria of molten nickel by Mg-<span class="hlt">Al</span> and Mn-<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The deoxidation equilibria of aluminum-magnesium and aluminum-manganese in liquid nickel equilibrated with <span class="hlt">Al</span>2O3-saturated Mg<span class="hlt">Al</span>2O4 and Mn<span class="hlt">Al</span>2O4, respectively, were investigated in the temperature range of 1773 to 1873 K. At 1773 K, the oxygen levels could be reduced\\u000a to 5.8 to 6.6 ppm with 2.5 to 10 ppm magnesium and 0.05 to 0.9 mass pct aluminum in the Ni-Mg-<span class="hlt">Al</span>-O system, and</p> <div class="credits"> <p class="dwt_author">Yihong Zhao; Kazuki Morita; Nobuo Sano</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">334</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19920053767&hterms=al2o3&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3Dal2o3"> <span id="translatedtitle">Combustion synthesis of TiB2-<span class="hlt">Al</span>2O3-<span class="hlt">Al</span> composite materials</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The oxide-aluminum exothermic reduction reaction is presently used in the combustion-synthesis of ceramic/metal composites. An excess of <span class="hlt">Al</span> is used in the reacting materials, which rapidly generate enough heat to exceed <span class="hlt">Al</span>'s melting point. The molten <span class="hlt">Al</span> thus evolved is allowed to infiltrate the porous ceramic matrix as the exothermic reaction proceeds; this feature of the process turns the disadvantage of high porosity levels in combustion-synthesized materials into an advantage. Attention is given to the system obtained with 3TiO2 + 3B2O3 + (10-x)<span class="hlt">Al</span> starting materials.</p> <div class="credits"> <p class="dwt_author">Feng, H. J.; Moore, J. J.; Wirth, D. G.</p> <p class="dwt_publisher"></p> <p class="publishDate">1991-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">335</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24784279"> <span id="translatedtitle">The Pt<span class="hlt">Al</span>(-) and Pt<span class="hlt">Al</span>2(-) anions: theoretical and photoelectron spectroscopic characterization.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">We report a joint photoelectron spectroscopic and theoretical study of the Pt<span class="hlt">Al</span>(-) and Pt<span class="hlt">Al</span>2(-) anions. The ground state structures and electronic configurations of these species were identified to be C?v, (1)?(+) for Pt<span class="hlt">Al</span>(-), and C2v, (2)B1 for Pt<span class="hlt">Al</span>2(-). Structured anion photoelectron spectra of these clusters were recorded and interpreted using ab initio calculations. Good agreement between theory and experiment was found. All experimental features were successfully assigned to one-electron transitions from the ground state of the anions to the ground or excited states of the corresponding neutral species. PMID:24784279</p> <div class="credits"> <p class="dwt_author">Zhang, Xinxing; Ganteför, Gerd; Bowen, Kit H; Alexandrova, Anastassia N</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-04-28</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">336</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2003CPL...378...65L"> <span id="translatedtitle">Molecular structures and energetics of the neutral aluminum trimethylaluminum complex: an <span class="hlt">Al</span> <span class="hlt">Al</span> bonded global minimum?</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">From their recent laboratory kinetics studies, Parker and Nelson have proposed a monobridged molecular structure for the aluminum atom-trimethylaluminum system. Here molecular structures and energetics for the neutral aluminum atom-trimethylaluminum complex (<span class="hlt">Al</span>TMA) are reported from theory. A second distinct minimum was located and characterized, corresponding to an unanticipated H 3C-<span class="hlt">Al-Al</span>(CH 3) 2 geometry. In addition, the transition state between the two minima was located. The relative energies of these stationary points are also reported, predicting that the monobridged <span class="hlt">Al</span>TMA structure recently reported is higher in energy than the methylaluminum DMA discovered in this study by about 2 kcal mol -1.</p> <div class="credits"> <p class="dwt_author">Larkin, Joseph D.; Moran, Damian; Schaefer, Henry F., III</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-08-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">337</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.gpo.gov:80/fdsys/pkg/FR-2010-09-23/pdf/2010-23731.pdf"> <span id="translatedtitle">75 FR 57846 - Amendment of Class E Airspace; Brewton, <span class="hlt">AL</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013</a></p> <p class="result-summary">...Amendment of Class E Airspace; Brewton, <span class="hlt">AL</span> AGENCY: Federal Aviation Administration...at Brewton Municipal Airport, Brewton, <span class="hlt">AL</span>, by updating the geographic coordinates...of Brewton Municipal Airport, Brewton, <span class="hlt">AL</span>. This action makes the adjustment....</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2010-09-23</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">338</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.gpo.gov:80/fdsys/pkg/FR-2013-12-02/pdf/2013-28677.pdf"> <span id="translatedtitle">78 FR 72008 - Establishment of Class E Airspace; Aliceville, <span class="hlt">AL</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013</a></p> <p class="result-summary">...Establishment of Class E Airspace; Aliceville, <span class="hlt">AL</span> AGENCY: Federal Aviation Administration...establishes Class E Airspace at Aliceville, <span class="hlt">AL</span>, to accommodate a new Area Navigation...establish Class E airspace at Aliceville, <span class="hlt">AL</span>(78 FR 52111) Docket No....</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2013-12-02</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">339</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.gpo.gov:80/fdsys/pkg/FR-2012-11-13/pdf/2012-27494.pdf"> <span id="translatedtitle">77 FR 67689 - Fidelity Aberdeen Street Trust, et <span class="hlt">al</span>.;</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013</a></p> <p class="result-summary">...812-13731] Fidelity Aberdeen Street Trust, et <span class="hlt">al</span>.; Notice of Application November 6...1\\ Colchester Street Trust, et <span class="hlt">al</span>., Investment Company Act Release Nos...amending, Colchester Street Trust, et <span class="hlt">al</span>., Investment Company Act Release...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2012-11-13</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">340</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40288444"> <span id="translatedtitle">Study of precipitation in aged binary Mg–<span class="hlt">Al</span> and ternary Mg–<span class="hlt">Al</span>–Zn alloys using 27<span class="hlt">Al</span> NMR spectroscopy</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Nuclear magnetic resonance (NMR) spectroscopy of 27<span class="hlt">Al</span> was used to study the development of precipitation in aged Mg–6 wt%<span class="hlt">Al</span>, Mg–9 wt%<span class="hlt">Al</span> and Mg–9 wt%<span class="hlt">Al</span>–(x) wt%Zn alloys. The 27<span class="hlt">Al</span> spectra for the aged alloys consist of two peaks; one from the aluminium in solid solution and the other from aluminium in the precipitate phase. The proportion of aluminium atoms in the</p> <div class="credits"> <p class="dwt_author">S. Celotto; T. J. Bastow</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_16");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' 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class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_17");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return 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onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">341</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/49302748"> <span id="translatedtitle">Oxidation and interfacial fracture behaviour of NiCr<span class="hlt">AlY\\/Al</span> 2O 3 coatings on an orthorhombic-Ti 2<span class="hlt">Al</span>Nb alloy</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary"><span class="hlt">Al</span>2O3 diffusion barriers of various thicknesses have been fabricated by filtered arc ion plating between the NiCr<span class="hlt">Al</span>Y coating and the O-Ti2<span class="hlt">Al</span>Nb alloy. Isothermal oxidation tests and three-point bend tests have been conducted to investigate the influence of the <span class="hlt">Al</span>2O3 diffusion barriers on the oxidation and interfacial fracture behaviour of the coatings. The results indicate that the <span class="hlt">Al</span>2O3 diffusion barrier defers</p> <div class="credits"> <p class="dwt_author">H. Q. Li; Q. M. Wang; S. M. Jiang; J. Ma; J. Gong; C. Sun</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">342</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40432711"> <span id="translatedtitle">Oxidation behavior of laser remelted plasma sprayed NiCr<span class="hlt">Al</span>Y and NiCr<span class="hlt">AlY–Al</span> 2O 3 coatings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Two types of plasma sprayed coatings (NiCr<span class="hlt">Al</span>Y and NiCr<span class="hlt">AlY–Al</span>2O3) were remelted by continuous wave CO2 laser. A homogeneous dense remelted layer without voids, cavities, unmelted particles and microcracks was formed. As a result of isothermal oxidation tests at 1000°C, the weight gains of laser remelted coatings, especially laser remelted NiCr<span class="hlt">AlY–Al</span>2O3 coatings, were obviously lower than plasma sprayed coatings. The effects</p> <div class="credits"> <p class="dwt_author">Y. N Wu; G Zhang; Z. C Feng; B. C Zhang; Y Liang; F. J Liu</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">343</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40431555"> <span id="translatedtitle">Graded <span class="hlt">Al–Al</span>N, TiN, and Ti<span class="hlt">Al</span>N multilayers deposited by radio-frequency reactive magnetron sputtering</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Graded layers and multilayers have been reported to improve surface properties of steel tools. Our study was aimed at defining the appropriate processing parameters for deposition of graded <span class="hlt">Al–Al</span>N and <span class="hlt">AlN–TiN–TiAl</span>N multilayers on silicon, glass, and M2 steel tools. The layers were deposited by r.f. reactive magnetron sputtering using dual cathode targets, Ti and <span class="hlt">Al</span>. The ratio of nitrogen flow</p> <div class="credits"> <p class="dwt_author">A. Raveh; M. Weiss; M. Pinkas; D. Z. Rosen; G. Kimmel</p> <p class="dwt_publisher"></p> <p class="publishDate">1999-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">344</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40432279"> <span id="translatedtitle">Deposition and characterization of Ni<span class="hlt">Al</span> and Ni–<span class="hlt">Al</span>–N thin films from a Ni<span class="hlt">Al</span> compound target</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Ni<span class="hlt">Al</span> and Ni–<span class="hlt">Al</span>–N thin films have been deposited from a dense and homogeneous Ni<span class="hlt">Al</span> compound target onto various substrates, including stainless steel, glass, and Si100 wafer, by using RF magnetron sputtering. The films have been characterized using X-ray diffraction, X-ray photoelectron spectroscopy, Auger electron spectroscopy, scanning electron microscopy, and scanning transmission electron microscopy. Both the Ni<span class="hlt">Al</span> and Ni–<span class="hlt">Al</span>–N thin films</p> <div class="credits"> <p class="dwt_author">D Zhong; J. J Moore; T. R Ohno; J Disam; S Thiel; I Dahan</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">345</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2008JAP...104d3502A"> <span id="translatedtitle">Exothermic reactions in Co/<span class="hlt">Al</span> nanolaminates</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Vapor-deposited Co/<span class="hlt">Al</span> nanolaminates having a net equiatomic stoichiometry exhibited rapid, high-temperature synthesis. When ignited locally, 7.5-?m-thick Co/<span class="hlt">Al</span> foils were characterized by self-sustained propagating reactions with flame front speeds between ~0.5 and 9 m/s. Speed was largely affected by bilayer thickness and premixed volume fraction, consistent with previous studies of other exothermic multilayers. Cobalt aluminide foils reacted by self-propagating synthesis developed a variety of rough surface morphologies characterized by a large amplitude (peak-to-valley ~1.0 ?m), multiperiod, wavelike structure. High-temperature reaction was also stimulated by rapid global heating. Tests revealed low ignition temperatures (Tig)~240-460 °C compared with previous Co-<span class="hlt">Al</span> powder reactant experiments. Ignition temperature was influenced by bilayer thickness. All foils ignited by global heating and those reacted in a self-propagating mode developed a single-phase B2 (CsCl-type) crystal structure. Thick Co/<span class="hlt">Al</span> nanolaminates were used successfully to join a few different materials including metalized <span class="hlt">Al</span>2O3 (by soldering) and polyetheretherketone (by direct attachment).</p> <div class="credits"> <p class="dwt_author">Adams, D. P.; Hodges, V. C.; Bai, M. M.; Jones, E.; Rodriguez, M. A.; Buchheit, T.; Moore, J. J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">346</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40514522"> <span id="translatedtitle">Improved oxidation resistance of NiCr<span class="hlt">Al</span>Y coatings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">In order to improve the oxidation resistance of NiCr<span class="hlt">Al</span>Y coatings, <span class="hlt">Al</span>2O3 second phase was incorporated into NiCr<span class="hlt">Al</span>Y coatings obtained by plasma-laser technique. After laser remelting, the <span class="hlt">Al</span>2O3 second phase was distributed in the grains as well as on the grain boundaries of the coatings. The <span class="hlt">Al</span>2O3 second phase could improve the oxidation resistance of NiCr<span class="hlt">Al</span>Y coatings during oxidation at 1000</p> <div class="credits"> <p class="dwt_author">Y. N. Wu; M. Qin; Z. C. Feng; Y. Liang; C. Sun; F. H. Wang</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">347</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40369513"> <span id="translatedtitle">Ion-plated <span class="hlt">Al–Al</span> 2O 3 films as diffusion barriers between NiCr<span class="hlt">Al</span>Y coating and orthorhombic-Ti 2<span class="hlt">Al</span>Nb alloy</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Ion-plated <span class="hlt">Al–Al</span>2O3 cermet films were fabricated as diffusion barriers between NiCr<span class="hlt">Al</span>Y coating and orthhombic-Ti2<span class="hlt">Al</span>Nb alloy. The oxidation and interdiffusion behaviour of coatings with and without diffusion barrier were investigated in isothermal and cyclic oxidation tests at 800°C. The results indicated that substantial interdiffusion and rapid oxidation degradation occurred in the coated specimens without diffusion barrier. With <span class="hlt">Al–Al</span>2O3 diffusion barriers, deferred</p> <div class="credits"> <p class="dwt_author">H. Q. Li; Q. M. Wang; S. M. Jiang; J. Gong; C. Sun</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">348</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.gpo.gov:80/fdsys/pkg/FR-2012-07-10/pdf/2012-16429.pdf"> <span id="translatedtitle">77 FR 40492 - Revocation of Class D Airspace; Andalusia, <span class="hlt">AL</span>; and Amendment of Class E Airspace; Fort Rucker, <span class="hlt">AL</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013</a></p> <p class="result-summary">...Revocation of Class D Airspace; Andalusia, <span class="hlt">AL</span>; and Amendment of Class E Airspace; Fort Rucker, <span class="hlt">AL</span> AGENCY: Federal Aviation Administration (FAA...action removes Class D Airspace at Andalusia, <span class="hlt">AL</span>, as the Air Traffic Control Tower at...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2012-07-10</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">349</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.gpo.gov:80/fdsys/pkg/FR-2011-11-17/pdf/2011-29656.pdf"> <span id="translatedtitle">76 FR 71355 - United States et <span class="hlt">al</span>. v. Blue Cross and Blue Shield of Montana, Inc. et <span class="hlt">al</span>.; Proposed Final...</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013</a></p> <p class="result-summary">...OF JUSTICE Antitrust Division United States et <span class="hlt">al</span>. v. Blue Cross and Blue Shield of Montana, Inc. et <span class="hlt">al</span>.; Proposed Final Judgment and Competitive...Montana, Billings Division, in United States et <span class="hlt">al</span>. v. Blue Cross and Blue Shield of...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2011-11-17</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">350</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/676870"> <span id="translatedtitle">Boron strengthening in Fe<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">The effect of boron on the strength of B2-structured Fe<span class="hlt">Al</span> is considered as a function of composition, grain size and temperature. Boron does not affect the concentrations of antisite atoms or vacancies present, with the former increasing and the latter decreasing with increasing deviation from the stoichiometric composition. When vacancies are absent, the strength increase per at. % B per unit lattice strain, {Delta}{sigma}/({Delta}c x {epsilon}) increases with increasing aluminum concentration, but when vacancies are present (>45 at. % <span class="hlt">Al</span>), {Delta}{sigma}/({Delta}c x {epsilon}) decreases again. Boron increases grain size strengthening in Fe<span class="hlt">Al</span>. B strengthening is roughly independent of temperature up to the yield strength peak but above the point, when diffusion-assisted deformation occurs, boron strengthening increases dramatically.</p> <div class="credits"> <p class="dwt_author">Baker, I.; Li, X.; Xiao, H.; Klein, O.; Nelson, C. [Dartmouth Coll., Hanover, NH (United States). Thayer School of Engineering; Carleton, R.L.; George, E.P. [Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">351</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24534024"> <span id="translatedtitle">Why is <span class="hlt">ALS</span> so Difficult to Treat?</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Amyotrophic lateral sclerosis (<span class="hlt">ALS</span>) is proving intractable. Difficulties in pre-clinical studies contribute in small measure to this futility, but the chief reason for failure is an inadequate understanding of disease pathogenesis. Many acquired and inherited processes have been advanced as potential causes of <span class="hlt">ALS</span> but, while they may predispose to disease, it seems increasingly likely that none leads directly to <span class="hlt">ALS</span>. Rather, two recent overlapping considerations, both involving aberrant protein homeostasis, may provide a better explanation for a common disease phenotype and a common terminal pathogenesis. If so, therapeutic approaches will need to be altered and carefully nuanced, since protein homeostasis is essential and highly conserved. Nonetheless, these considerations provide new optimism in a difficult disease which has hitherto defied treatment. PMID:24534024</p> <div class="credits"> <p class="dwt_author">Turnbull, John</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-03-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">352</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3423946"> <span id="translatedtitle"><span class="hlt">ALS</span> and Frontotemporal Dysfunction: A Review</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p class="result-summary">Though once believed to be a disease that was limited to the motor system, it is now apparent that amyotrophic lateral sclerosis (<span class="hlt">ALS</span>) may be associated with cognitive changes in some patients. Changes are consistent with frontotemporal dysfunction, and may range from mild abnormalities only recognized with formal neuropsychological testing, to profound frontotemporal dementia (FTD). Executive function, behavior, and language are the most likely areas to be involved. Screening helpful in detecting abnormalities includes verbal or categorical fluency, behavioral inventories filled out by the caregiver, and evaluation for the presence of depression and pseudobulbar affect. Patients with cognitive dysfunction have shortened survival and may be less compliant with recommendations regarding use of feeding tubes and noninvasive ventilation. Evolving knowledge of genetic and pathological links between <span class="hlt">ALS</span> and FTD has allowed us to better understand the overlapping spectrum of <span class="hlt">ALS</span> and FTD.</p> <div class="credits"> <p class="dwt_author">Achi, Eugene Y.; Rudnicki, Stacy A.</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">353</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/434994"> <span id="translatedtitle">The mechanical properties of Fe<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Only in the last few years has progress been made in obtaining reproducible mechanical properties data for Fe<span class="hlt">Al</span>. Two sets of observations are the foundation of this progress. The first is that the large vacancy concentrations that exist in Fe<span class="hlt">Al</span> at high temperature are easily retained at low temperature and that these strongly affect the low-temperature mechanical properties. The second is that RT ductility is adversely affected by water vapor. Purpose of this paper is not to present a comprehensive overview of the mechanical properties of Fe<span class="hlt">Al</span> but rather to highlight our understanding of key phenomena and to show how an understanding of the factors which control the yield strength and fracture behavior has followed the discovery of the above two effects. 87 refs, 9 figs.</p> <div class="credits"> <p class="dwt_author">Baker, I. [Dartmouth Coll., Hanover, NH (United States); George, E.P. [Oak Ridge National Lab., TN (United States)</p> <p class="dwt_publisher"></p> <p class="publishDate">1996-12-31</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">354</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/22150063"> <span id="translatedtitle">Synthesis of nanostructured <span class="hlt">Al</span>N by solid state reaction of <span class="hlt">Al</span> and diaminomaleonitrile</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">The solid state reaction of diaminomaleonitrile (DAMN) with aluminum via both mechanochemical and thermal treatment routes was studied by X-ray diffraction and Fourier transform infrared spectroscopy. During the milling process, the reaction starts with the deammoniation of the DAMN molecules, followed by the formation of nanostructured <span class="hlt">Al</span>N powder as the main solid product after milling for 7 h. The reactivity of the mixed powder was also investigated during the conventional thermal treatment process using differential scanning calorimetry, derivative thermogravimetry and thermogravimetric analysis. The results reveal that DAMN starts to polymerize at 192 Degree-Sign C by the elimination of the amine groups. Furthermore, increasing the annealing temperature leads to the formation of a nitrogen-containing carbonaceous material with the structure similar to non-crystalline carbon. However, no evidence for the formation of <span class="hlt">Al</span>N was observed in the annealed samples even at temperatures as high as the <span class="hlt">Al</span> melting point. - Graphical abstract: <span class="hlt">Al</span>N nanoparticles obtained after milling of <span class="hlt">Al</span> and diaminomaleonitrile (DAMN) for 12 h. Highlights: Black-Right-Pointing-Pointer Solid state reaction of diaminomaleonitrile (DAMN) with <span class="hlt">Al</span> was studied via mechanochemical and thermal treatment routs. Black-Right-Pointing-Pointer Nanocrystalline <span class="hlt">Al</span>N was successfully synthesized by the mechanochemical process. Black-Right-Pointing-Pointer The C/N material was formed by polymerization of DAMN during the thermal treatment process. Black-Right-Pointing-Pointer No reaction between DAMN and <span class="hlt">Al</span> was detected during the thermal treatment method.</p> <div class="credits"> <p class="dwt_author">Rounaghi, S.A., E-mail: s.a.rounaghi@gmail.com [Department of Materials Engineering, Ferdowsi University of Mashhad. P.O. Box no. 91775-1111, Mashhad (Iran, Islamic Republic of); IFW Dresden, Institut fuer Komplexe Materialien, Postfach 27 01 16, Dresden D-01171 (Germany); Eshghi, H., E-mail: heshghi@ferdowsi.um.ac.ir [Department of Chemistry, Ferdowsi University of Mashhad. P.O. Box no. 91775-1436, Mashhad (Iran, Islamic Republic of); Kiani Rashid, A.R.; Vahdati Khaki, J. [Department of Materials Engineering, Ferdowsi University of Mashhad. P.O. Box no. 91775-1111, Mashhad (Iran, Islamic Republic of)] [Department of Materials Engineering, Ferdowsi University of Mashhad. P.O. Box no. 91775-1111, Mashhad (Iran, Islamic Republic of); Samadi Khoshkhoo, M.; Scudino, S. [IFW Dresden, Institut fuer Komplexe Materialien, Postfach 27 01 16, Dresden D-01171 (Germany)] [IFW Dresden, Institut fuer Komplexe Materialien, Postfach 27 01 16, Dresden D-01171 (Germany); Eckert, J. [IFW Dresden, Institut fuer Komplexe Materialien, Postfach 27 01 16, Dresden D-01171 (Germany) [IFW Dresden, Institut fuer Komplexe Materialien, Postfach 27 01 16, Dresden D-01171 (Germany); TU Dresden, Institut fuer Werkstoffwissenschaft, Dresden D-01062 (Germany)</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-02-15</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">355</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://eric.ed.gov/?q=Axiom&pg=5&id=EJ689425"> <span id="translatedtitle">An Alternative Perspective on von Winterfeldt et <span class="hlt">al.'s</span> (1997) Test of Consequence Monotonicity</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p class="result-summary">D. von Winterfeldt, N.-K. Chung, R. D. Luce, and Y. Cho (see record 1997-03378-008) provided several tests for consequence monotonicity of choice or judgment, using certainty equivalents of gambles. The authors reaxiomatized consequence monotonicity in a probabilistic framework and reanalyzed von Winterfeldt et <span class="hlt">al.'s</span> main experiment via a…</p> <div class="credits"> <p class="dwt_author">Ho, Moon-Ho R.; Regenwetter, Michel; Niederee, Reinhard; Heyer, Dieter</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">356</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2006PMM...102..646N"> <span id="translatedtitle">Preparation, deformation, and failure of functional <span class="hlt">Al</span>-Sn and <span class="hlt">Al</span>-Sn-Pb nanocrystalline alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Changes in the structure, hardness, mechanical properties, and friction coefficient of <span class="hlt">Al</span>-30% Sn, <span class="hlt">Al</span>-15% Sn-25% Pb, and <span class="hlt">Al</span>-5% Sn-35% Pb (wt %) alloys subjected to severe plastic deformation by equal-channel angular pressing (with a force of 40 tonne) and by shear at a pressure of 5 GPa have been studied. The transition into the nanocrystalline state was shown to occur at different degrees of plastic deformation. The hardness exhibits nonmonotonic variations, namely, first it increases and subsequently decreases. The friction coefficient of the <span class="hlt">Al</span>-30% Sn, <span class="hlt">Al</span>-15% Sn-25% Pb, and <span class="hlt">Al</span>-5% Sn-35% Pb alloys quenched from the melt was found to be 0.33; the friction coefficients of these alloys in the submicrocrystalline state (after equal-channel angular pressing) equal 0.24, 0.32, and 0.35, respectively. The effect of disintegration into nano-sized powders was found to occur in the <span class="hlt">Al</span>-15% Sn-25% Pb, and <span class="hlt">Al</span>-5% Sn-35% Pb alloys after severe plastic deformation to ? = 6.4 and subsequent short-time holding.</p> <div class="credits"> <p class="dwt_author">Noskova, N. I.; Vil'Danova, N. F.; Filippov, Yu. I.; Churbaev, R. V.; Pereturina, I. A.; Korshunov, L. G.; Korznikov, A. V.</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">357</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2014PhRvC..89f5805B"> <span id="translatedtitle">Nucleosynthesis of <span class="hlt">Al</span>26 in massive stars: New <span class="hlt">Al</span>27 states above ? and neutron emission thresholds</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The 26<span class="hlt">Al</span> radioisotope is of great importance for understanding the chemical and dynamical evolution of our galaxy. Among the possible stellar sources, massive stars are believed to be the main producer of this radioisotope. Understanding 26<span class="hlt">Al</span> nucleosynthesis in massive stars requires estimates of the thermonuclear reaction rates of the <span class="hlt">Al</span>26(n,p)26Mg, <span class="hlt">Al</span>26(n,?)23Na, and Na23(?,p)26Mg reactions. These reaction rates depend on the spectroscopic properties of 27<span class="hlt">Al</span> states above the neutron and alpha thresholds. In this context, the <span class="hlt">Al</span>27(p,p')27<span class="hlt">Al</span>* reaction was studied at 18 MeV using a high-resolution Enge Split-Pole spectrometer. States from the ground state up to excitation energies of ?14 MeV were populated. While up to the 23Na + ? threshold no additional states are observed, we report for the first time 30 new levels above the 23Na + ? threshold and more than 30 new states above the 26<span class="hlt">Al</span> + n threshold for which excitation energies are determined with an uncertainty of 4-5 keV.</p> <div class="credits"> <p class="dwt_author">Benamara, S.; de Séréville, N.; Laird, A. M.; Hammache, F.; Stefan, I.; Roussel, P.; Ancelin, S.; Assié, M.; Coc, A.; Deloncle, I.; Fox, S. P.; Kiener, J.; Lefebvre, L.; Lefebvre-Schuhl, A.; Mavilla, G.; Morfouace, P.; Sánchez-Benítez, Á. M.; Perrot, L.; Sinha, M.; Tatischeff, V.; Vandebrouck, M.</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">358</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/doepatents/biblio/872577"> <span id="translatedtitle">Electronic circuits having Ni<span class="hlt">Al</span> and Ni.sub.3 <span class="hlt">Al</span> substrates</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p class="result-summary">An electronic circuit component having improved mechanical properties and thermal conductivity comprises Ni<span class="hlt">Al</span> and/or Ni.sub.3 <span class="hlt">Al</span>, upon which an alumina layer is formed prior to applying the conductive elements. Additional layers of copper-aluminum alloy or copper further improve mechanical strength and thermal conductivity.</p> <div class="credits"> <p class="dwt_author">Deevi, Seetharama C. (Midlothian, VA); Sikka, Vinod K. (Oak Ridge, TN)</p> <p class="dwt_publisher"></p> <p class="publishDate">1999-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">359</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2005JTST...14..264K"> <span id="translatedtitle"><span class="hlt">Al</span>-rich precipitation in CoNiCr<span class="hlt">Al</span>Y bondcoat at high temperature</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">A thermal barrier coating (TBC) is applied on a surface of a gas turbine blade to provide a thermal barrier and oxidation resistant properties for the components. The ability to resist oxidation of the coating arises from the self-healing, protective <span class="hlt">Al</span>2O3 scale on top of the bondcoat, which is formed during service. However, if <span class="hlt">Al</span> depletion occurs within the bondcoat, the protective scale will lose its self-healing ability, and hence, its oxidation-resistant property. This paper investigated the depletion of <span class="hlt">Al</span> within the bondcoat by studying the microstructure of the bondcoat on a gas turbine blade after it has been in 4000 h service at 1200 °C. The results showed that <span class="hlt">Al</span> depletion had occurred at different levels throughout the turbine blade. In the area where <span class="hlt">Al</span> depletion had not yet occurred, precipitation of an <span class="hlt">Al</span>-rich phase was detected. Most of the <span class="hlt">Al</span> was contained within this phase, leaving only small amount of <span class="hlt">Al</span> in the surrounding matrix. A well-defined boundary was observed between the depleted and non-depleted regions.</p> <div class="credits"> <p class="dwt_author">Koomparkping, T.; Damrongrat, S.; Niranatlumpong, P.</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">360</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2009MMTA...40.1541Q"> <span id="translatedtitle">Combustion Synthesis Reactions in Cold-Rolled Ni/<span class="hlt">Al</span> and Ti/<span class="hlt">Al</span> Multilayers</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">In this article, a cold rolling method was developed to fabricate Ni/<span class="hlt">Al</span> and Ti/<span class="hlt">Al</span> multilayer foils, and the combustion synthesis reactions in the cold-rolled foils were investigated. Combustion synthesis reactions were initiated by heating one end of the cold-rolled foil in a flame for several seconds. The Ni/<span class="hlt">Al</span> foils went through three reaction stages. The first reaction stage was a displacement of reaction zone with <span class="hlt">Al</span>3Ni as the reaction product. During the second stage, the part of the foil in the flame underwent thermal explosion. In the last stage, the heat released by thermal explosion triggered a self-propagating high-temperature synthesis (SHS) reaction across the foil that resulted in the formation of <span class="hlt">Al</span>Ni. In contrast, the Ti/<span class="hlt">Al</span> foils experienced only two reaction stages. First, a displacement of the reaction zone propagated across the foil with formation of <span class="hlt">Al</span>3Ti at the Ti/<span class="hlt">Al</span> interface. Then a thermal explosion reaction occurred in the part of foil that was heated in the flame, resulting in many different phases in the reacted foil.</p> <div class="credits"> <p class="dwt_author">Qiu, Xiaotun; Liu, Ranran; Guo, Shengmin; Graeter, Jesse Harris; Kecskes, Laszlo; Wang, Jiaping</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-07-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_17");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" 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<a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a style="font-weight: bold;">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_20");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">361</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/60226911"> <span id="translatedtitle">Stress-strain behavior of fine-grained <span class="hlt">Al\\/Al</span>[sub 3]Ti alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">It has been recognized that dispersion strengthening with hard, stable, high melting point phases offers an effective technique for improving the stiffness of aluminum alloys over a wider temperature range compared to precipitation strengthening. Recent research indicates that mechanically alloyed (MA) <span class="hlt">Al</span>-Ti alloys have good ambient and elevated temperature properties. The MA <span class="hlt">Al</span>-Ti alloys are characterized by the presence of</p> <div class="credits"> <p class="dwt_author">S. H. Wang; P. W. Kao; C. P. Chang</p> <p class="dwt_publisher"></p> <p class="publishDate">1993-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">362</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2011mave.book..105G"> <span id="translatedtitle">Mathematik <span class="hlt">als</span> Geisteswissenschaft Der Mathematikschädigung dialogisch vorbeugen</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Ursprünglich wollte ich Architekt werden getreu den Vorbildern von Vater und Großvater. Darum zeichnete ich bereits <span class="hlt">als</span> neunjähriges Kind Pläne von Häusern in der Art, wie ich sie oft zu sehen bekam. Ein ausgemustertes Holzdreieck mit einem rechten und zwei halben rechten Winkeln war das einzige Konstruktionswerkzeug, das ich damals besaß und mit dem ich mich ans Werk machte. Zuerst einmal war da natürlich ein Rechteck <span class="hlt">als</span> Grundriss des Hauses zu zeichnen: Eine Seite, ein rechter Winkel, die zweite Seite, wieder ein rechterWinkel, die dritte Seite in gleicher Länge wie die erste und dann der dritte rechte Winkel, dessen letzter Schenkel die vierte Seite gab.</p> <div class="credits"> <p class="dwt_author">Gallin, Peter</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">363</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/6137079"> <span id="translatedtitle">Stress-strain behavior of fine-grained <span class="hlt">Al/Al</span>[sub 3]Ti alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">It has been recognized that dispersion strengthening with hard, stable, high melting point phases offers an effective technique for improving the stiffness of aluminum alloys over a wider temperature range compared to precipitation strengthening. Recent research indicates that mechanically alloyed (MA) <span class="hlt">Al</span>-Ti alloys have good ambient and elevated temperature properties. The MA <span class="hlt">Al</span>-Ti alloys are characterized by the presence of large volume fractions of submicron sized <span class="hlt">Al</span>[sub 3]Ti dispersoids within a fine grain aluminum matrix. In addition, such alloys contain a significant amount of ultrafine <span class="hlt">Al</span>[sub 4]C[sub 3] and <span class="hlt">Al</span>[sub 2]O[sub 3] dispersoids incorporated during the MA process. The carbide and oxide dispersoids reside mainly along grain boundaries and can stabilize a fine-grain structure even after long term exposure at elevated temperature. The high temperature strength of these MA aluminum alloys is strongly controlled by carbide and oxide dispersoids. The Young's modulus of <span class="hlt">Al</span>[sub 3]Ti phase was determined to be about 220 GPa. Hence, the presence of the <span class="hlt">Al</span>[sub 3]Ti phase is very effective in increasing the stiffness of the MA aluminum alloys is strongly controlled by carbide and oxide dispersoids. The Young's modulus of <span class="hlt">Al</span>[sub 3]Ti phase was determined to be about 220 GPa. Hence, the presence of the <span class="hlt">Al</span>[sub 3]Ti phase is very effective in increasing the stiffness of the MA aluminum alloys. The strength of such alloys increases with increasing <span class="hlt">Al</span>[sub 3]Ti content; however, the strengthening effect of <span class="hlt">Al</span>[sub 3]Ti dispersoids diminishes at temperatures above about 400C. On the other hand, such dispersoids also appear responsible for improving the high temperature ductility of the MA <span class="hlt">Al</span>-Ti alloys. A better understanding of the strengthening mechanisms is desirable. This paper presents the room temperature stress-strain behavior of two <span class="hlt">Al-Al</span>[sub 3]Ti alloys made by mechanical alloying and hot-pressing.</p> <div class="credits"> <p class="dwt_author">Wang, S.H.; Kao, P.W.; Chang, C.P. (National Sun Yat-Sen Univ., Kaohsiung (Taiwan, Province of China))</p> <p class="dwt_publisher"></p> <p class="publishDate">1993-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">364</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2012JPhCS.400c2052M"> <span id="translatedtitle">27<span class="hlt">Al</span>-NQR Study on Novel Phase Transition in CeOs2<span class="hlt">Al</span>10</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">We have performed 27<span class="hlt">Al</span>-NQR measurements in CeOs2<span class="hlt">Al</span>10 which exhibits a novel phase transition at T0=29 K The NQR parameters determined for all the <span class="hlt">Al</span> sites in ambient pressure were compared with those in CeRu2<span class="hlt">Al</span>10 with T0=27 K and CeFe2<span class="hlt">Al</span>10 with no phase transition. The distinct NQR splitting just below T0=32.5 K under pressure 0.66 GPa ensures an enhancement of T0 and a homogeneous transition. Despite the increase of T0, the nuclear spin-lattice relaxation rate 1/Tl is suppressed over whole range of temperature than in ambient pressure. The characteristic features of no critical slowing down at T0 and of the remarkable decrease of 1/T1T starting at T > T0 become prominent under pressure, suggesting an approach to Kondo semiconductor in a valence fluctuation regime.</p> <div class="credits"> <p class="dwt_author">Matsumura, M.; Inagaki, T.; Kato, H.; Nishioka, T.; Tanida, H.; Sera, M.</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">365</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19980210984&hterms=MAPLE+reactor&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DMAPLE%2Breactor"> <span id="translatedtitle">CVD Fiber Coatings for <span class="hlt">Al</span>2O3/Ni<span class="hlt">Al</span> Composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">While sapphire-fiber-reinforced nickel aluminide (<span class="hlt">Al</span>2O3/Ni<span class="hlt">Al</span>) composites are an attractive candidate for high-temperature structures, the significant difference in the coefficient of thermal expansion between the Ni<span class="hlt">Al</span> matrix and the sapphire fiber creates substantial residual stresses in the composite. This study seeks to produce two fiber-coating systems with the potential to reduce the residual stresses in the sapphire/Ni<span class="hlt">Al</span> composite system. Chemical vapor deposition (CVD) was used to produce both the compensating and compliant-fiber coatings for use in sapphire/Ni<span class="hlt">Al</span> composites. A special reactor was designed and built to produce the FGM and to handle the toxic nickel precursors. This process was successfully used to produce 500-foot lengths of fiber with coating thicknesses of approximately 3 microns, 5 microns, and 10 microns.</p> <div class="credits"> <p class="dwt_author">Boss, Daniel E.</p> <p class="dwt_publisher"></p> <p class="publishDate">1995-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">366</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2012PhRvC..85f5804P"> <span id="translatedtitle">26<span class="hlt">Al</span>+p elastic and inelastic scattering reactions and galactic abundances of 26<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Galactic 26<span class="hlt">Al</span> is the first radioactive nucleus to be positively identified by ?-ray astronomy with detection of the 1.809 MeV ? ray associated with its decay. This nucleus is destroyed in astrophysical environments in the 26<span class="hlt">Al</span>(p,?)27Si and inelastic 26<span class="hlt">Al</span>+p scattering reactions where properties of 27Si levels determine reaction rates. To investigate these properties, elastic and inelastic 26<span class="hlt">Al</span>+p scattering reactions were measured between Ec.m. = 0.5-1.5 MeV at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory (ORNL). A candidate for a new resonance in the 26<span class="hlt">Al</span>(p,?)27Si reaction was identified. Upper limits were also set on the strengths of postulated resonances and on the cross section of the inelastic reaction, but there is little effect on current reaction rate calculations.</p> <div class="credits"> <p class="dwt_author">Pittman, S. T.; Bardayan, D. W.; Chae, K. Y.; Chipps, K. A.; Jones, K. L.; Kozub, R. L.; Matei, C.; Matos, M.; Moazen, B. H.; Nesaraja, C. D.; O'Malley, P. D.; Pain, S. D.; Parker, P. D.; Peters, W. A.; Shriner, J. F., Jr.; Smith, M. S.</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">367</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2011JAP...109b4502P"> <span id="translatedtitle">Aging- and annealing-induced variations in Nb/<span class="hlt">Al-Al</span>Ox/Nb tunnel junction properties</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">In this paper, we present studies of room temperature aging and annealing of Nb/<span class="hlt">Al-Al</span>Ox/Nb tunnel junctions with the size of 2-3 ?m2. We observed a noticeable drop of junction normal resistance Rn unusually combined with increase in subgap resistance Rj as a result of aging. Variation in both Rn and Rj are subject to the junction size effect. An effect of aging history on the junction degradation after consequent annealing was discovered. Discussion and interpretation of the observed phenomena are presented in terms of structural ordering and reconstruction in the <span class="hlt">Al</span>Ox layer, driven by diffusion flows enhanced due to stress relaxation processes in the <span class="hlt">Al</span> layer interfacing the <span class="hlt">Al</span>Ox layer.</p> <div class="credits"> <p class="dwt_author">Pavolotsky, Alexey B.; Dochev, Dimitar; Belitsky, Victor</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">368</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2010SurSc.604...63P"> <span id="translatedtitle">Interfacial properties of <span class="hlt">Al</span>N and oxidized <span class="hlt">Al</span>N on Si</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">We report on the characteristics of metal-insulator-semiconductor (MIS) capacitors with aluminum nitride (<span class="hlt">Al</span>N) as the insulator material. <span class="hlt">Al</span>N has been grown on (1 1 1) Si by means of molecular beam epitaxy (MBE) and DC magnetron sputtering (SPU). <span class="hlt">Al</span>N layers have been characterized before and after dry thermal oxidation in O 2. By analyzing changes in morphology and electrical properties, different oxidation mechanisms were identified, due to the crystalline quality difference of the <span class="hlt">Al</span>N samples. In both cases, oxidation at 1000 °C was beneficial for the electrical characteristics of the MIS structures, presumably due to passivation of atom vacancies. Although <span class="hlt">Al</span>N was only partially oxidized, the flat-band voltage was reduced and the density of interface traps improved. Dominant conduction mechanism was Poole-Frenkel for the SPU sample, and changed to hopping after oxidation.</p> <div class="credits"> <p class="dwt_author">Placidi, M.; Pérez-Tomás, A.; Moreno, J. C.; Frayssinet, E.; Semond, F.; Constant, A.; Godignon, P.; Mestres, N.; Crespi, A.; Millán, J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">369</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/5188197"> <span id="translatedtitle"><span class="hlt">Al</span>/sub 2/O/sub 3/ adherence on CoCr<span class="hlt">Al</span> alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Adherence of protective oxides on NiCr<span class="hlt">Al</span> and CoCr<span class="hlt">Al</span> superalloys has been promoted by a dispersion of a highly oxygen reactive element or its oxide being produced within the protection system. Two aspects of this subject are investigated here: the use of <span class="hlt">Al</span>/sub 2/O/sub 3/ as both the dispersion and protective oxide; and the production of an HfO/sub 2/ dispersion while simultaneously aluminizing the alloy. It was found that an <span class="hlt">Al</span>/sub 2/O/sub 3/ dispersion will act to promote the adherence of an external scale of <span class="hlt">Al</span>/sub 2/O/sub 3/ to a degree comparable to previously tested dispersions and an HfO/sub 2/ dispersion comparable to that produced by a Rhines pack treatment is produced during aluminization.</p> <div class="credits"> <p class="dwt_author">Kingsley, L.M.</p> <p class="dwt_publisher"></p> <p class="publishDate">1980-04-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">370</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=20100042390&hterms=water+metals+ICP-OES&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3Dwater%2Bmetals%2BICP-OES"> <span id="translatedtitle">Formation of gamma'-Ni3<span class="hlt">Al</span> via the Peritectoid Reaction: gamma plus beta (+<span class="hlt">Al</span>2O3) equals gamma'(+<span class="hlt">Al</span>2O3)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The activities of <span class="hlt">Al</span> and Ni were measured using multi-cell Knudsen effusion-cell mass spectrometry (multi-cell KEMS), over the composition range 8 - 32 at.%<span class="hlt">Al</span> and temperature range T = 1400 - 1750 K in the Ni-<span class="hlt">Al</span>-O system. These measurements establish that equilibrium solidification of gamma'-Ni3<span class="hlt">Al</span>-containing alloys occurs by the eutectic reaction, L (+ <span class="hlt">Al</span>2O3) = gamma + beta (+ <span class="hlt">Al</span>2O3), at 1640 plus or minus 1 K and a liquid composition of 24.8 plus or minus 0.2 at.%<span class="hlt">Al</span> (at an unknown oxygen content). The {gamma + beta + <span class="hlt">Al</span>2O3} phase field is stable over the temperature range 1633 - 1640 K, and gamma'-Ni3<span class="hlt">Al</span> forms via the peritectiod, gamma + beta (+ <span class="hlt">Al</span>2O3) = gamma'(+ <span class="hlt">Al</span>2O3), at 1633 plus or minus 1 K. This behavior is inconsistent with the current Ni-<span class="hlt">Al</span> phase diagram and a new diagram is proposed. This new Ni-<span class="hlt">Al</span> phase diagram explains a number of unusual steady state solidification structures reported previously and provides a much simpler reaction scheme in the vicinity of the gamma'-Ni3<span class="hlt">Al</span> phase field.</p> <div class="credits"> <p class="dwt_author">Copland, Evan</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">371</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=20080047352&hterms=water+metals+ICP-OES&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dwater%2Bmetals%2BICP-OES"> <span id="translatedtitle">Formation of gamma(sup prime)-Ni3<span class="hlt">Al</span> via the Peritectoid Reaction: gamma + beta (+ <span class="hlt">Al</span>2O3)=gamma(sup prime)(+ <span class="hlt">Al</span>2O3)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The activities of <span class="hlt">Al</span> and Ni were measured using multi-cell Knudsen effusion-cell mass spectrometry (multi-cell KEMS), over the composition range 8-32 at.%<span class="hlt">Al</span> and temperature range T=1400-1750 K in the Ni-<span class="hlt">Al</span>-O system. These measurements establish that equilibrium solidification of gamma(sup prime)-Ni3<span class="hlt">Al</span>-containing alloys occurs by the eutectic reaction, L (+ <span class="hlt">Al</span>2O3)=gamma + Beta(+ <span class="hlt">Al</span>2O3), at 1640 +/- 1 K and a liquid composition of 24.8 +/- 0.2 at.%<span class="hlt">al</span> (at an unknown oxygen content). The {gamma + Beta (+<span class="hlt">Al</span>2O3} phase field is stable over the temperature range 1633-1640 K, and gamma(sup prime)-Ni3<span class="hlt">Al</span> forms via the peritectoid, gamma + Beta (+ <span class="hlt">Al</span>2O3)=gamma(sup prime) (+ <span class="hlt">Al</span>2O3), at 1633 +/- 1 K. This behavior is consistent with the current Ni-<span class="hlt">Al</span> phase diagram and a new diagram is proposed. This new Ni-<span class="hlt">Al</span> phase diagram explains a number of unusual steady-state solidification structures reported previously and provides a much simpler reaction scheme in the vicinity of the gamma(sup prime)-Ni2<span class="hlt">Al</span> phase field.</p> <div class="credits"> <p class="dwt_author">Copeland, Evan</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">372</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/53707116"> <span id="translatedtitle">Structural, morphological, and optical properties of <span class="hlt">Al</span>GaN\\/GaN heterostructures with <span class="hlt">Al</span>N buffer and interlayer</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">AlxGa1-xN\\/GaN (x~0.3) heterostructures with and without a high-temperature (HT) <span class="hlt">Al</span>N interlayer (IL) have been grown on sapphire (<span class="hlt">Al</span>2O3) substrates and <span class="hlt">Al</span>N buffer\\/<span class="hlt">Al</span>2O3 templates by metal organic chemical vapor deposition. The effects of an <span class="hlt">Al</span>N buffer layer (BL) grown on an <span class="hlt">Al</span>2O3 substrate and an <span class="hlt">Al</span>N IL grown under the <span class="hlt">Al</span>GaN ternary layer (TL) on structural, morphological, and optical properties of</p> <div class="credits"> <p class="dwt_author">S. Çörekçi; M. K. Öztürk; B. Akaoglu; M. Çakmak; S. Özçelik; E. Özbay</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">373</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/19592064"> <span id="translatedtitle">The origin of <span class="hlt">Al</span>(OH)(3)-rich and <span class="hlt">Al</span>(13)-aggregate flocs composition in PACl coagulation.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">The composition of hydrolyzed <span class="hlt">Al</span> species is essential for the understanding of coagulation with <span class="hlt">Al</span>-based coagulants. Surface characteristics of flocs formed by coagulation with two distinct polyaluminum chloride (PACl) coagulants were identified. One commercial coagulant (PACl-C) with voluminous monomeric <span class="hlt">Al</span> and colloidal <span class="hlt">Al</span>(OH)(3) and a custom-made PACl (PACl-<span class="hlt">Al</span>(13)) containing high <span class="hlt">Al</span>(13) content were applied to destabilize kaolin particles. The flocs formed by PACl-C and PACl-<span class="hlt">Al</span>(13) at neutral and alkaline pH ranges, respectively, were observed by FE-SEM and HR-TEM. In addition, the <span class="hlt">Al</span> composition of these flocs was characterized by XPS and HR-XRD, and the imaging of <span class="hlt">Al</span>(OH)(3) precipitates and <span class="hlt">Al</span>(13) aggregates were conducted by SEM as well as tapping mode AFM in liquid system. The observations of flocs indicate that the morphology of <span class="hlt">Al</span>(OH)(3)-rich flocs are fluffy and porous around the edge of flocs, while the <span class="hlt">Al</span>(13)-aggregate flocs have a glossy contour and irregular structure. Both <span class="hlt">Al</span>(OH)(3)-rich and <span class="hlt">Al</span>(13)-aggregate flocs do not possess well-formed crystalline structure except for the <span class="hlt">Al</span>(13)-like crystal exists in the <span class="hlt">Al</span>(13)-aggregate flocs. Among <span class="hlt">Al</span>(OH)(3) precipitates, colloidal <span class="hlt">Al</span>(OH)(3) is micro-scale in size, while amorphous <span class="hlt">Al</span>(OH)(3) is nano-scale. During the formation of <span class="hlt">Al</span>(13) aggregates, some coiled and clustered <span class="hlt">Al</span>(13) aggregates with smoother surface were observed. The XPS study on floc surface showed that tetrahedral (<span class="hlt">Al</span>(IV)) /octahedral (<span class="hlt">Al</span>(VI)) <span class="hlt">Al</span> ratio on the surfaces of PACl-C and PACl-<span class="hlt">Al</span>(13) flocs is 1:1.6 and 1:9.9, respectively. Of the in situ formed <span class="hlt">Al</span>(13), almost half of <span class="hlt">Al</span>-hydroxide precipitates on the surface of <span class="hlt">Al</span>(OH)(3)-rich flocs possess the <span class="hlt">Al</span>(IV) center. It also found that the irregularly aggregated <span class="hlt">Al</span>(13) with a similar <span class="hlt">Al</span>(13) crystalline structure subsists on the surface of <span class="hlt">Al</span>(13)-aggregate flocs. PMID:19592064</p> <div class="credits"> <p class="dwt_author">Lin, Jr-Lin; Huang, Chihpin; Chin, Ching-Ju M; Pan, Jill R</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-09-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">374</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/18054033"> <span id="translatedtitle">Thermodynamics on hydride vapor phase epitaxy of <span class="hlt">Al</span>N using <span class="hlt">Al</span>Cl3 and NH3</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">A thermodynamic analysis on hydride vapor phase epitaxy (HVPE) of <span class="hlt">Al</span>N using <span class="hlt">Al</span>Cl3 and NH3 was performed. Regardless of the carrier gas used, partial pressures of <span class="hlt">Al</span>-containing gaseous species [<span class="hlt">Al</span>Cl3, <span class="hlt">Al</span>Cl2, <span class="hlt">Al</span>Cl and (<span class="hlt">Al</span>Cl3)2] in equilibrium with <span class="hlt">Al</span>N are significantly low in the temperature range of 500-1500 °C when the input V\\/III ratio is above 1. This means that the</p> <div class="credits"> <p class="dwt_author">Y. Kumagai; K. Takemoto; J. Kikuchi; T. Hasegawa; H. Murakami; A. Koukitu</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">375</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013NIMPB.307..123Y"> <span id="translatedtitle">The modulation structure induced changes in mechanical properties of Ti<span class="hlt">AlN/Al</span>2O3 multilayers</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Ti<span class="hlt">AlN/Al</span>2O3 multilayers which had different separate layer thickness of Ti<span class="hlt">Al</span>N or <span class="hlt">Al</span>2O3 were synthesized by sputtering Ti3<span class="hlt">Al</span> and <span class="hlt">Al</span>2O3 targets with N2 and Ar gases. The influence of modulation periods and modulation ratios on structure and properties of Ti<span class="hlt">AlN/Al</span>2O3 multilayers was investigated using scanning electron microscopy, X-ray diffraction, X-ray Photoelectron Spectroscopy, surface profiler, and nanoindenter. Compared to Ti<span class="hlt">Al</span>N layer with only (2 0 0) preferred orientation, Ti<span class="hlt">AlN/Al</span>2O3 multilayers were crystallized with orientations in the Ti<span class="hlt">Al</span>N (1 1 1), Ti<span class="hlt">Al</span>N (2 2 2) and <span class="hlt">Al</span>N (1 0 0). Besides, weak <span class="hlt">Al</span>2O3 (0 2 2) orientation is observed, when modulation period is 8.9 nm. The maximum hardness about 36.6 GPa was obtained at modulation period of 10.4 nm and modulation ratio of 10:1. The hardness and the toughness of Ti<span class="hlt">AlN/Al</span>2O3 multilayers increase as individual Ti<span class="hlt">Al</span>N layer thickness increases.</p> <div class="credits"> <p class="dwt_author">Yan, J. Y.; Li, D. J.; Dong, L.; Gao, C. K.; Wang, N.; Deng, X. Y.; Gu, H. Q.; Wan, R. X.; Sun, X.</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-07-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">376</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/23490503"> <span id="translatedtitle">Oxidation of Volatile Organic Compounds on <span class="hlt">Al</span> 2O 3, Pd\\/<span class="hlt">Al</span> 2O 3, and PdO\\/<span class="hlt">Al</span> 2O 3Catalysts</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Temperature-programmed desorption (TPD) and oxidation (TPO) were used to study the decomposition and oxidation of methanol, ethanol, acetaldehyde, formic acid, and acetic acid on <span class="hlt">Al</span>2O3, Pd\\/<span class="hlt">Al</span>2O3, and PdO\\/<span class="hlt">Al</span>2O3catalysts. The oxidation and decomposition rates were much higher on Pd\\/<span class="hlt">Al</span>2O3than on <span class="hlt">Al</span>2O3, even though the volatile organic compounds (VOCs) were adsorbed on the <span class="hlt">Al</span>2O3support in both cases. The VOCs surface-diffused to Pd</p> <div class="credits"> <p class="dwt_author">Eric M Cordi; John L Falconer</p> <p class="dwt_publisher"></p> <p class="publishDate">1996-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">377</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/52337531"> <span id="translatedtitle">Improved electrical properties in <span class="hlt">Al</span>GaN\\/GaN heterostructures using <span class="hlt">Al</span>N\\/GaN superlattice as a quasi-<span class="hlt">Al</span>GaN barrier</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The authors report the electrical properties of two-dimensional electron gas (2DEG) in <span class="hlt">Al</span>GaN\\/GaN heterostructures using <span class="hlt">Al</span>N\\/GaN superlattices working as a quasi-<span class="hlt">Al</span>GaN barrier layer. It is found that the electrical properties (2DEG mobility and sheet carrier density) in the quasi-<span class="hlt">Al</span>GaN\\/GaN heterostructure are greatly improved compared to those in the conventional alloy-<span class="hlt">Al</span>GaN\\/GaN one at the high <span class="hlt">Al</span> composition more than 0.35. The</p> <div class="credits"> <p class="dwt_author">Y. Kawakami; A. Nakajima; X. Q. Shen; G. Piao; M. Shimizu; H. Okumura</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">378</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/41031993"> <span id="translatedtitle">Microstructure characterization in cryomilled <span class="hlt">Al</span> 5083</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Nanocrystalline metals and alloys processed by severe plastic deformation (SPD) generally have improved mechanical strength compared with conventionally processed materials. In this work, we survey the microstructure of an <span class="hlt">Al</span> 5083 alloy prepared by ball-milling powders at cryogenic temperatures (cryomilling) then consolidated by hot-isostatic pressing (HIPing) and extrusion into cylindrical billets. After milling, the particles are comprised of nanocrystalline grains,</p> <div class="credits"> <p class="dwt_author">G. Lucadamo; N. Y. C. Yang; C. San Marchi; E. J. Lavernia</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">379</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=ADA247593"> <span id="translatedtitle">Mg-Si-<span class="hlt">Al</span> Oxynitride Glasses.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">The glass-forming region at 1650 deg C was investigated for Mg-Si-<span class="hlt">Al</span>-O-N compositions containing up to 20 equivalent % N (16 atomic %), and glass batches of up to 30 g were prepared and characterized. Glasses containing up to 8 atomic % N were grey colore...</p> <div class="credits"> <p class="dwt_author">D. R. Messier R. P. Gleisner</p> <p class="dwt_publisher"></p> <p class="publishDate">1992-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">380</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/18484338"> <span id="translatedtitle"><span class="hlt">AL</span> amyloidosis manifesting as systemic lymphadenopathy.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">We report three patients with <span class="hlt">AL</span> amyloidosis manifesting as systemic lymphadenopathy, mainly in the cervical and supraclavicular regions. Histopathology of lymph nodes showed massive deposition of <span class="hlt">AL</span> amyloid with no abnormal findings suggestive of lymphoproliferative disorders. Two of the patients were considered to be classifiable as primary systemic <span class="hlt">AL</span> amyloidosis based on the presence of M-protein in serum and abnormal plasma cells or lymphoplasmacytoid cells in the bone marrow probably producing the precursor immunoglobulin, although no visceral organs were affected. The size of the involved lymph nodes in these two patients increased gradually, and one was treated with rituximab and VAD (vincristine, doxorubicin and dexamethasone) followed by high-dose melphalan with autologous peripheral blood stem cell transplantation (auto-PBSCT). The remaining patient showed no obvious change in the size of lymph nodes or detectable M-protein in serum. The prognosis of <span class="hlt">AL</span> amyloidosis manifesting as lymphadenopathy is usually good as long as there are no hematological malignancies or rapid increases in the size of lymph nodes, but in cases of the systemic type, intensive chemotherapy, such as high-dose melphalan with auto-PBSCT, should be actively considered in order to avoid possible involvement of visceral organs. PMID:18484338</p> <div class="credits"> <p class="dwt_author">Matsuda, Masayuki; Gono, Takahisa; Shimojima, Yasuhiro; Yoshida, Takuhiro; Katoh, Nagaaki; Hoshii, Yoshinobu; Yamada, Toshiyuki; Ikeda, Shu-ichi</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-06-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_18");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a 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showDiv("page_21");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">381</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2813314"> <span id="translatedtitle">Kinematics of Disease Progression in Bulbar <span class="hlt">ALS</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p class="result-summary">The goal of this study was to investigate the deterioration of lip and jaw movements during speech longitudinally in three individuals diagnosed with bulbar Amyotrophic Lateral Sclerosis (<span class="hlt">ALS</span>). The study was motivated by the need to understand the relationship between physiologic changes in speech movements and clinical measures of speech performance such as speaking rate and speech intelligibility. Movements of the lip and jaw were quantified with respect to their size (i.e., path distance measure), speed, and duration. The data revealed several changes in lip and jaw movement that coincided with <span class="hlt">ALS</span> progression. In two out of three speakers, the changes in measures of path distance and speed anticipated the drop in speech intelligibility by approximately 3 months. With disease progression, increases in movement duration coincided with declines in speech intelligibility. Overall, the movement measures appeared to be sensitive to disease progression in <span class="hlt">ALS</span>. Learning outcomes By the end of the manuscript, the reader should be able to: (1) describe the changes that occur in articulatory movements of the jaw and lower lip in <span class="hlt">ALS</span>; (2) understand the relationship between physiologic measures of movement and speech intelligibility and speaking rate; (3) identify critical points in the disease progression and understand which quantitative measures reveal the state of the bulbar system at these time points.</p> <div class="credits"> <p class="dwt_author">Yunusova, Yana; Green, Jordan; Lindstrom, Mary; Ball, Laura; Pattee, Gary; Zinman, Lorne</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">382</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/1991SSCom..77..403S"> <span id="translatedtitle">Elastically isotropic <span class="hlt">Al</span>-Li-Cu quasicrystal</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Angular dependence of Rayleigh wave velocity has been measured in single grain quasi-crystals of <span class="hlt">Al</span>-Li-Cu using a continuous wave scanning acoustic microscope. The observed variation is quite small. This indicates the elastically isotropic nature of quasi-crystals.</p> <div class="credits"> <p class="dwt_author">Sathish, S.; Kulik, A.; Gremaud, G.</p> <p class="dwt_publisher"></p> <p class="publishDate">1991-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">383</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/doepatents/biblio/869994"> <span id="translatedtitle">Ternary Dy-Er-<span class="hlt">Al</span> magnetic refrigerants</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/doepatents">DOEpatents</a></p> <p class="result-summary">A ternary magnetic refrigerant material comprising (Dy.sub.1-x Er.sub.x)<span class="hlt">Al</span>.sub.2 for a magnetic refrigerator using the Joule-Brayton thermodynamic cycle spanning a temperature range from about 60K to about 10K, which can be adjusted by changing the Dy to Er ratio of the refrigerant.</p> <div class="credits"> <p class="dwt_author">Gschneidner, Jr., Karl A. (Ames, IA); Takeya, Hiroyuki (Ibaraki, JP)</p> <p class="dwt_publisher"></p> <p class="publishDate">1995-07-25</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">384</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://eric.ed.gov/?q=%22495%22&pg=6&id=EJ734728"> <span id="translatedtitle">Correction to Rothermund et <span class="hlt">al</span>. (2005)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p class="result-summary">This article reports an error in the article "Retrieval of Incidental Stimulus-Response Associations as a Source of Negative Priming" by Rothermund et <span class="hlt">al</span>. ("Journal of Experimental Psychology: Learning, Memory, and Cognition," Vol 31(3) May 2005, 482-495). Table 1 (p. 484) was incorrectly typeset. The correct layout is provided. (The following…</p> <div class="credits"> <p class="dwt_author">Rothermund, Klaus; Wentura, Dirk; De Houwer, Jan</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">385</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/41315105"> <span id="translatedtitle">Bulk nanocrystalline <span class="hlt">Al</span> prepared by cryomilling</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Bulk nanocrystalline <span class="hlt">Al</span> was fabricated by mechanically milling at cryogenic temperature (cryomilling) and then by hot pressing in vacuum. By using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), the microstructure evolution of the material during cryomilling and consolidation was investigated. With increasing the milling time, the grain size decreased sharply and reduced to 42 nm</p> <div class="credits"> <p class="dwt_author">Cheng Junsheng; Cui Hua; Chen Hanbin; Yang Bin; Fan Jianzhong; Zhang Jishan</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">386</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/47949245"> <span id="translatedtitle">Megatrends <span class="hlt">als</span> Treiber der Zukunftssicherung des Controllings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">\\u000a Es besteht Einigkeit in Theorie und Praxis, das Controlling <span class="hlt">als</span> eine Führungsunterstützungsfunktion anzusehen. Sie besteht\\u000a darin, die Führung bei der Wahrnehmung ihrer Steuerungsaufgaben mit einem koordinierten System von Planung und Kontrolle sowie\\u000a Informationsversorgung zu unterstützen. Im Fokus der Unterstützung stehen Ziele und Strategien der Organisation.</p> <div class="credits"> <p class="dwt_author">Péter Horváth; Johannes Isensee; Mischa Seiter</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">387</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/58665475"> <span id="translatedtitle">En torno <span class="hlt">al</span> Siglo de los Niños</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Willen KOOPS ; Michael ZUCKERMAN (eds.). Beyond the Century of the Child : cultural history and developmental psychology. Denyse BAILLARGEON. Un Québec en mal d´enfants. La médicalisation de la maternité, 1910-1970. Enrique PERDIGUERO (comp.). Salvad <span class="hlt">al</span> niño. Estudios sobre la protección\\u000aa la infancia en la Europa mediterránea a comienzos del siglo XX.</p> <div class="credits"> <p class="dwt_author">Rosa Ballester Añón</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">388</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://eric.ed.gov/?q=Amyotrophic+AND+Lateral+AND+Sclerosis&id=EJ869605"> <span id="translatedtitle">Kinematics of Disease Progression in Bulbar <span class="hlt">ALS</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p class="result-summary">The goal of this study was to investigate the deterioration of lip and jaw movements during speech longitudinally in three individuals diagnosed with bulbar amyotrophic lateral sclerosis (<span class="hlt">ALS</span>). The study was motivated by the need to understand the relationship between physiologic changes in speech movements and clinical measures of speech…</p> <div class="credits"> <p class="dwt_author">Yunusova, Yana; Green, Jordan R.; Lindstrom, Mary J.; Ball, Laura J.; Pattee, Gary L.; Zinman, Lorne</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">389</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2006PSSBR.243.1431K"> <span id="translatedtitle">Thermodynamics on hydride vapor phase epitaxy of <span class="hlt">Al</span>N using <span class="hlt">Al</span>Cl3 and NH3</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">A thermodynamic analysis on hydride vapor phase epitaxy (HVPE) of <span class="hlt">Al</span>N using <span class="hlt">Al</span>Cl3 and NH3 was performed. Regardless of the carrier gas used, partial pressures of <span class="hlt">Al</span>-containing gaseous species [<span class="hlt">Al</span>Cl3, <span class="hlt">Al</span>Cl2, <span class="hlt">Al</span>Cl and (<span class="hlt">Al</span>Cl3)2] in equilibrium with <span class="hlt">Al</span>N are significantly low in the temperature range of 500-1500 °C when the input V/III ratio is above 1. This means that the driving force for <span class="hlt">Al</span>N growth (?PAl) becomes almost equal to the input partial pressure of <span class="hlt">Al</span>Cl3, which is quite different from HVPE of GaN. The good agreement between the calculated and experimental growth rates shows that HVPE of <span class="hlt">Al</span>N is thermodynamically controlled.</p> <div class="credits"> <p class="dwt_author">Kumagai, Y.; Takemoto, K.; Kikuchi, J.; Hasegawa, T.; Murakami, H.; Koukitu, A.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">390</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=20040028027&hterms=Alstom&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3DAlstom"> <span id="translatedtitle">Durability Assessment of Gamma Ti<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">Gamma Ti<span class="hlt">Al</span> was evaluated as a candidate alloy for low-pressure turbine blades in aeroengines. The durability of g-Ti<span class="hlt">Al</span> was studied by examining the effects of impact or fretting on its fatigue strength. Cast-to-size Ti-48<span class="hlt">Al</span>-2Cr-2Nb was studied in impact testing with different size projectiles at various impact energies as the reference alloy and subsequently fatigue tested. Impacting degraded the residual fatigue life. However, under the ballistic impact conditions studied, it was concluded that the impacts expected in an aeroengine would not result in catastrophic damage, nor would the damage be severe enough to result in a fatigue failure under the anticipated design loads. In addition, other gamma alloys were investigated including another cast-to-size alloy, several cast and machined specimens, and a forged alloy. Within this Ti-48-2-2 family of alloys aluminum content was also varied. The cracking patterns as a result of impacting were documented and correlated with impact variables. The cracking type and severity was reasonably predicted using finite element models. Mean stress affects were also studied on impact-damaged fatigue samples. The fatigue strength was accurately predicted based on the flaw size using a threshold-based, fracture mechanics approach. To study the effects of wear due to potential applications in a blade-disk dovetail arrangement, the machined Ti-47-2-2 alloy was fretted against In-718 using pin-on-disk experiments. Wear mechanisms were documented and compared to those of Ti-6<span class="hlt">Al</span>-4V. A few fatigue samples were also fretted and subsequently fatigue tested. It was found that under the conditions studied, the fretting was not severe enough to affect the fatigue strength of g-Ti<span class="hlt">Al</span>.</p> <div class="credits"> <p class="dwt_author">Draper, Susan L.; Lerch, Bradley A.; Pereira, J. Michael; Miyoshi, Kazuhisa; Arya, Vinod K.; Zhuang, Wyman</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">391</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24704984"> <span id="translatedtitle">Fate of hydrolyzed <span class="hlt">Al</span> species in humic acid coagulation.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">The hydrolysis of <span class="hlt">Al</span>-based coagulants in acidic conditions is necessary for the removal of organic matter by the coagulation/sedimentation process. However, interactions between hydrolyzed <span class="hlt">Al</span> species and organic matter are complicated and this makes it difficult to optimize coagulant dosing for organics removal. The goal of this study was to investigate the reactions of hydrolyzed <span class="hlt">Al</span> species in the coagulation of organic matter. Two polyaluminum chloride (PACl) coagulants, a commercial product with sulfate (PACl-C) and lab-prepared material (PACl-<span class="hlt">Al</span>13) containing 7% and 96% of total <span class="hlt">Al</span> as <span class="hlt">Al</span>13, respectively, have been applied to investigate the coagulation of humic acid (HA). At pH 6, a lower dosage of PACl-<span class="hlt">Al</span>13 than of PACl-C was required for optimized HA removal through coagulation/sedimentation due to the strong complexation and charge neutralization by <span class="hlt">Al</span>13. Observation of the coagulation process using wet scanning electron microscopy showed that PACl-C produced both clustered flocs and linear precipitates in the presence of sulfate while PACl-<span class="hlt">Al</span>13 produced curled precipitates due to the formation of intermolecular complex, when both coagulants were added at the optimum doses. Investigation of <span class="hlt">Al</span>-HA floc by (27)<span class="hlt">Al</span>-NMR and <span class="hlt">Al</span> 2p XPS suggested that monomeric <span class="hlt">Al</span> (Alm) was hydrolyzed into <span class="hlt">Al</span>(OH)3 with tetrahedron for PACl-C coagulation while a half of <span class="hlt">Al</span>13 slowly decomposed into octahedral <span class="hlt">Al</span>-HA precipitates for PACl-<span class="hlt">Al</span>13 coagulation. Meanwhile, C ls XPS indicated that aromatic CC of HA was preferentially removed from solution to <span class="hlt">Al</span>-HA flocs for both PACl-C and PACl-<span class="hlt">Al</span>13 coagulation. It was concluded that <span class="hlt">Al</span>-HA complexation strongly affects the reaction pathways for <span class="hlt">Al</span> hydrolysis and the final nature of the precipitates during PACl coagulation of HA and that the hydrolysis products are also strongly affected by the characteristics of the PACl coagulant. PMID:24704984</p> <div class="credits"> <p class="dwt_author">Lin, Jr-Lin; Huang, Chihpin; Dempsey, Brian; Hu, Jing-Yi</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">392</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/1000697"> <span id="translatedtitle">Structure of vapor-phase deposited <span class="hlt">Al</span>-Ge thin films and <span class="hlt">Al</span>-Ge intermediate layer bonding of <span class="hlt">Al</span>-based microchannel structures.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary"><span class="hlt">Al</span>-based high-aspect-ratio microscale structures (HARMS) are basic building blocks for all-<span class="hlt">Al</span> microdevices. Bonding of <span class="hlt">Al</span>-based HARMS is essential for device assembly. In this paper, bonding of <span class="hlt">Al</span>-based HARMS to flat <span class="hlt">Al</span> plates using <span class="hlt">Al</span>-Ge thin film intermediate layers is investigated. The structure of sputter codeposited <span class="hlt">Al</span>-Ge thin films was studied by high-resolution transmission electron microscopy as a function of the average film composition. The structure of the interface region between <span class="hlt">Al</span>-based HARMS bonded to flat <span class="hlt">Al</span> plates is studied by combining focused ion beam sectioning and scanning electron microscopy. An extended bonding interface region, {approx}100 {micro}m in width, is observed and suggested to result from liquidus/solidus reactions as well as diffusion of Ge in solid <span class="hlt">Al</span> at the bonding temperature of 500 C. The extended interface region is suggested to be beneficial to <span class="hlt">Al-Al</span> bonding via <span class="hlt">Al</span>-Ge intermediate layers.</p> <div class="credits"> <p class="dwt_author">Mei, F. H.; Meng, W. J.; Hiller, J.; Miller, D. J.; Materials Science Division; Louisana State Univ.</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">393</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/1992PhRvL..68.2188N"> <span id="translatedtitle">Calculation of the structure of the <span class="hlt">Al</span>(331) stepped surface</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Car-Parinello-like calculations have been used to compute the relaxation of the <span class="hlt">Al</span>(331) surface, with results that are in remarkable agreement with the low-energy electron-diffraction analysis of Adams and Sorenson. Rapid screening of the steps on <span class="hlt">Al</span>(331) is illustrated by comparing its charge density and relaxations to those of <span class="hlt">Al</span>(110) and <span class="hlt">Al</span>(111).</p> <div class="credits"> <p class="dwt_author">Nelson, J. S.; Feibelman, Peter J.</p> <p class="dwt_publisher"></p> <p class="publishDate">1992-04-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">394</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://eric.ed.gov/?q=%22self-construal%22&pg=2&id=EJ666015"> <span id="translatedtitle">When Validity Testing Lacks Validity: Comment on Levine et <span class="hlt">al</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p class="result-summary">Addresses each of the three main areas of Levine et <span class="hlt">al.'s</span> (see this issue, CS 764 297) validity testing: mean differences in self-construals between Asians and Westerners and within individuals; priming experiments; and factor analysis of self-construal scales. Suggests that Levine et <span class="hlt">al.'s</span> conclusions on crucial aspects of validity are untenable.…</p> <div class="credits"> <p class="dwt_author">Kim, Min-Sun; Raja, Narayan S.</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">395</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23924708"> <span id="translatedtitle">High-performance nonvolatile <span class="hlt">Al/Al</span>O(x)/CdTe:Sb nanowire memory device.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Here we demonstrate a room temperature processed nonvolatile memory device based on an <span class="hlt">Al/Al</span>O(x)/CdTe:Sb nanowire (NW) heterojunction. Electrical analysis shows an echelon hysteresis composed of a high-resistance state (HRS) and a low-resistance state (LRS), which can allow it to write and erase data from the device. The conductance ratio is as high as 10?, with a retention time of 3 × 10? s. Moreover, the SET voltages ranged from +6 to +8 V, whilst the RESET voltage ?0 V. In addition, flexible memory nano-devices on PET substrate with comparable switching performance at bending condition were fabricated. XPS analysis of the <span class="hlt">Al/Al</span>O(x)/CdTe:Sb NW heterojunction after controlled Ar? bombardment reveals that this memory behavior is associated with the presence of ultra-thin <span class="hlt">Al</span>O(x) film. This <span class="hlt">Al/Al</span>O(x)/CdTe:Sb NW heterojunction will open up opportunities for new memory devices with different configurations. PMID:23924708</p> <div class="credits"> <p class="dwt_author">Xie, Chao; Nie, Biao; Zhu, Long; Zeng, Long-Hui; Yu, Yong-Qiang; Wang, Xian-He; Fang, Qun-Ling; Luo, Lin-Bao; Wu, Yu-Cheng</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-09-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">396</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/896194"> <span id="translatedtitle">Abrasive wear behavior of Ni<span class="hlt">Al</span> and Ni<span class="hlt">Al</span>-TiB2 composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Abrasive wear of Ni<span class="hlt">Al</span> and Ni<span class="hlt">Al</span> with 10, 20, and 40 vol.% TiB2 has been investigated using particles of different types and sizes. The addition of TiB2 as a particulate reinforcement to Ni<span class="hlt">Al</span> increases the hardness of the composite with respect to Ni<span class="hlt">Al</span>, and reduces the wear rate at all volume fractions on garnet and <span class="hlt">Al</span>2O3 abrasives. Abrasion on SiC resulted in a minimum of the wear rate for the composite with 20% TiB2for most conditions. The composite with 40% TiB2consistently exhibited wear rates higher than the other composites when abraded on SiC. The only instance when the Ni<span class="hlt">Al</span>?40% TiB2 composite had a lower wear rate was when it was abraded on 16 and 37 mm SiC particles. The Ni<span class="hlt">Al</span>?TiB2 composite serves as a model system for studying the effect of reinforcement volume fraction on composite wear behavior and is discussed in terms of a composite wear model developed by Axe?n and Jacobson. q1999 Published by Elsevier Science S.A. All rights reserved.</p> <div class="credits"> <p class="dwt_author">Hawk, Jeffrey A.; Alman, David E.</p> <p class="dwt_publisher"></p> <p class="publishDate">1999-04-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">397</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013APS..MAR.G5002Z"> <span id="translatedtitle">Metastable <span class="hlt">Al</span>-rich phases in the <span class="hlt">Al</span>-Sm system: A genetic-algorithm study</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Metallic glasses formed by <span class="hlt">Al</span> and about 10% rare earths such as Sm are important high-strength-low-density materials. Various metastable crystalline phases are formed in the early stages of the devitrification of <span class="hlt">Al</span>90Sm10 glasses. Identification of these phases is crucial to understand the phase selection during amorphization and devitrification processes, and thus provides critical information for the control of microstructures in order to obtain desired mechanical properties. In this study, we use a genetic algorithm to systematically study the low energy <span class="hlt">Al</span>-rich phases of the <span class="hlt">Al</span>-Sm system. We discovered a new <span class="hlt">Al</span>5Sm phase that matches excellently with the experimentally detected M1 phase in lattice parameters as well as diffraction patterns. In addition, we established the energy landscape as a function of <span class="hlt">Al</span> composition on the <span class="hlt">Al</span>-rich side of the phase diagram, and found key geometries of Sm-centered local clusters which could serve as building blocks for other metastable phases.</p> <div class="credits"> <p class="dwt_author">Zhang, Feng; Ye, Zhuo; McBreaty, Ian; Mendelev, Mikhail; Ott, Ryan; Park, Eun Soo; Kramer, Matt; Wang, Cai-Zhuang; Ho, Kai-Ming</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-03-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">398</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2010AIPC.1251..300A"> <span id="translatedtitle">Precipitation mechanism of <span class="hlt">Al</span>-substituted tobermorite using hydrothermal reaction</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">We examined the addition of different crystal phases of alumina (?-<span class="hlt">Al</span>2O3, ?-<span class="hlt">Al</span>2O3) to slurries consisting of quartz and slaked lime for synthesis of <span class="hlt">Al</span>-substituted tobermorite. XRD results showed that <span class="hlt">Al</span>-substituted tobermorite formed after the reaction. It was clear that two kinds of <span class="hlt">Al</span>-substituted tobermorite synthesized using different alumina crystal phases shows different morphologies. The difference in the reactivity of the <span class="hlt">Al</span>2O3 had an influence in the hydrothermal reaction environment. The coordination number and chemical bonding-state of <span class="hlt">Al</span> caused the different morphology of the tobermorite.</p> <div class="credits"> <p class="dwt_author">Abe, Kazuki; Maeda, Hirotaka; Ishida, Emile H.</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">399</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40111735"> <span id="translatedtitle">Correlation of microstructure and high temperature oxidation resistance of plasma sprayed NiCr<span class="hlt">Al</span>, NiCr<span class="hlt">Al</span>Y, and Ti<span class="hlt">Al</span>O composite coatings on Ti?6<span class="hlt">Al</span>?4V</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">In the present study Ni?18Cr?6<span class="hlt">Al</span>, Ni?22Cr?10<span class="hlt">Al</span>?1Y and Ti<span class="hlt">Al</span>O composite powders were coated on Ti?6<span class="hlt">Al</span>?4V substrates by atmospheric\\u000a plasma spraying, and the coated specimens were evaluated by isothermal and cyclic oxidation resistance tests at 800°C. The\\u000a oxidation kinetics of the plasma sprayed NiCr<span class="hlt">Al</span>, NiCr<span class="hlt">Al</span>Y, and Ti<span class="hlt">Al</span>O composite coated specimens obey a parabolic rate law.\\u000a The oxidation resistance of the plasma sprayed</p> <div class="credits"> <p class="dwt_author">Byung-Young Choi; Jing Liang; Wei Gao</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">400</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40939554"> <span id="translatedtitle">Crystallization of Mg–<span class="hlt">Al</span> and <span class="hlt">Al</span>-based metallic liquids under ultra-high gravity</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">We present results from high-temperature centrifugal processing, which is a new method to detect the sequence of crystallization and to physically isolate eutectic compositions in multi-component alloys. Alloys of composition Mg50<span class="hlt">Al</span>30Y6Li7Cu7, Mg50<span class="hlt">Al</span>30Y6Li7Cu7, and <span class="hlt">Al</span>52.6Cu13.4Ge28Si6 were processed for 2 h in a centrifuge above their melting point at an inertial acceleration of 60,000 g (g=gravitational acceleration) and then slowly cooled to</p> <div class="credits"> <p class="dwt_author">Jörg F Löffler; William L Johnson</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_19");' href="#" title="Previous Page"> 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href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_22");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">401</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19870044771&hterms=al2o3&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dal2o3"> <span id="translatedtitle">Adherent <span class="hlt">Al</span>2O3 scales formed on undoped NiCr<span class="hlt">Al</span> alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">Changes in the spalling behavior of <span class="hlt">Al</span>2O3 scales formed on an undoped NiCr<span class="hlt">Al</span> alloy are described. Two samples of Ni-15Cr-13<span class="hlt">Al</span> (wt pct), one a control and the other sanded, were subjected to 25 oxidation cycles. It is observed that adherent scales formed on the sanded sample; however, the control sample had speckled, spalled scales. The data reveal that the adherent scales are caused by repeated removal of surface layers after each oxidation cycle. It is determined that interfacial segregation of sulfur influences spallation and sulfur removal increases bonding. The effect of moisture on scale adhesions is investigated.</p> <div class="credits"> <p class="dwt_author">Smialek, James L.</p> <p class="dwt_publisher"></p> <p class="publishDate">1987-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">402</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/18838240"> <span id="translatedtitle">Enhanced microwave absorption properties of Fe3<span class="hlt">Al\\/Al</span>2O3 fine particle composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Fe3<span class="hlt">Al\\/Al</span>2O3 composites were prepared by mechanochemical synthesis using a mixture of Fe2O3, <span class="hlt">Al</span> and Fe as the starting material. Microwave characteristics were measured in the range 0.1-18 GHz. A reflection loss (RL) exceeding -20 dB in the frequency range 7.2-17.4 GHz was achieved for an absorber of 1.5-2.5 mm. An optimal RL of -45 dB was obtained at 8.9 GHz</p> <div class="credits"> <p class="dwt_author">Jianqiang Wei; Jianbo Wang; Qingfang Liu; Liang Qiao; Tao Wang; Fashen Li</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">403</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://redalyc.uaemex.mx/redalyc/pdf/714/71416107.pdf"> <span id="translatedtitle">VIVÊNCIA DOS TRABALHADORES DE ENFERMAGEM <span class="hlt">FRENTE</span> AO USO DOS ANTIRETROVIRAIS APÓS EXPOSIÇÃO OCUPACIONAL A MATERIAL BIOLÓGICO 1 LIVING EXPERIENCE OF NURSING WORKERS FACED WITH THE USE OF ANTIRETROVIRALS AFTER OCCUPATIONAL EXPOSURE TO BIOLOGICAL MATERIAL LA VIVENCIA DE LOS TRABAJADORES DE LA ENFERMERÍA ANTE EL USO DE LOS ANTIRETROVIRAIS DESPUES DE LA EXPOSICIÓN OCUPACIONAL <span class="hlt">AL</span> MATERIAL BIOLÓGICO</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">This study is based on the Health Belief Model, using a quanti-qualitative approach by means of percentage calculations as quantitative data, while presenting qualitative data through content analysis. This study aims to analyze significant beliefs among nursing workers who were victims of occupational accidents while exposed to biological material, either adhering to chemoprophylactic treatment or not with antiretroviral medication. This</p> <div class="credits"> <p class="dwt_author">Giselle Clemente Sailer; Maria Helena P. Marziale</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">404</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/17888935"> <span id="translatedtitle">Relative importance of hydrolyzed <span class="hlt">Al</span>(III) species (<span class="hlt">Al</span>(a), <span class="hlt">Al</span>(b), and <span class="hlt">Al</span>(c)) during coagulation with polyaluminum chloride: a case study with the typical micro-polluted source waters.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">The relative importance of three different <span class="hlt">Al</span> species, <span class="hlt">Al</span>(a) (monomeric species, instantaneous reacted species), <span class="hlt">Al</span>(b) (medium polymer species, reacted less than 120 min), and <span class="hlt">Al</span>(c) (colloidal or solid species, no reaction), defined by timed complexation reaction rate measured by using ferron reagent in polyaluminum chloride (PACl) was investigated in terms of DOC (dissolved organic carbon), UV(254), and turbidity removal efficiencies. Micro-polluted, typical North China, source waters were used to conduct the experiments. The results show that DOC removal is correlated well to the content of <span class="hlt">Al</span>(b). Removal of UV(254) is determined by the content of <span class="hlt">Al</span>(b) and <span class="hlt">Al</span>(c), particularly <span class="hlt">Al</span>(c). Turbidity removal is primarily related to the content of <span class="hlt">Al</span>(c); however, <span class="hlt">Al</span>(b) could destabilize particles efficiently, and the flocs formed by <span class="hlt">Al</span>(b) are not as large as those formed by <span class="hlt">Al</span>(c), which affected the settling efficiency. Unlike the preformed <span class="hlt">Al</span>(b), the in situ formed <span class="hlt">Al</span>(b) could remove turbidity more efficiently since <span class="hlt">Al</span>(c) is the dominant final species formed during coagulation. <span class="hlt">Al</span>(a) shows a strong ability to react with some unsatisfied coordinate bonds of organic matter to facilitate particle and DOC removal. The distinct coagulation feature of <span class="hlt">Al</span>(a), <span class="hlt">Al</span>(b), and <span class="hlt">Al</span>(c) can be applied to develop tailor-made PACl (with the correct distribution of <span class="hlt">Al</span> species) to match the characteristics of raw water for optimized coagulation. PMID:17888935</p> <div class="credits"> <p class="dwt_author">Yan, Mingquan; Wang, Dongsheng; Qu, Jiuhui; He, Wenjie; Chow, Christopher W K</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-12-15</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">405</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/13165732"> <span id="translatedtitle">THERMODYNAMIC MODELLING OF THE Mg-<span class="hlt">Al</span>-Ca SYSTEM</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">In this study, the ternary Mg-<span class="hlt">Al</span>-Ca phase diagram was constructed by combining the three constituent binary systems of Mg-<span class="hlt">Al</span>, <span class="hlt">Al</span>-Ca and Mg-Ca. The Mg-<span class="hlt">Al</span> system is taken from COST 507 database. The thermodynamic descriptions of the Mg-Ca and <span class="hlt">Al</span>-Ca systems are obtained by modelling the Gibbs energy of all phases as a function of composition and temperature. The model parameters</p> <div class="credits"> <p class="dwt_author">F. ISLAM; M. MEDRAJ</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">406</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40850839"> <span id="translatedtitle">26<span class="hlt">Al</span>– 26Mg and 207Pb– 206Pb systematics of Allende CAIs: Canonical solar initial 26<span class="hlt">Al</span>\\/ 27<span class="hlt">Al</span> ratio reinstated</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The precise knowledge of the initial 26<span class="hlt">Al</span>\\/27<span class="hlt">Al</span> ratio [(26<span class="hlt">Al</span>\\/27<span class="hlt">Al</span>)0] is crucial if we are to use the very first solid objects formed in our Solar System, calcium–aluminum-rich inclusions (CAIs) as the “time zero” age-anchor and guide future work with other short-lived radio-chronometers in the early Solar System, as well as determining the inventory of heat budgets from radioactivities for early</p> <div class="credits"> <p class="dwt_author">Benjamin Jacobsen; Qing-Zhu Yin; Frederic Moynier; Yuri Amelin; Alexander N. Krot; Kazuhide Nagashima; Ian D. Hutcheon; Herbert Palme</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">407</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24045848"> <span id="translatedtitle">Controlled step-wise isomerization of the Keggin-type <span class="hlt">Al</span>(13) and determination of the ?-<span class="hlt">Al</span>(13) structure.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Partial hydrolysis of <span class="hlt">Al</span>Cl3 with Ca(OH)2 and the amino acid glycine enables the selective transformation of the <span class="hlt">Al</span>13 Keggin structures, outlining the ? ? ? ? ? isomerization process. Through this, a new ?-<span class="hlt">Al</span>13 Keggin structure was able to be isolated and characterized through (27)<span class="hlt">Al</span> NMR and single-crystal XRD. PMID:24045848</p> <div class="credits"> <p class="dwt_author">Smart, Scott E; Vaughn, John; Pappas, Iraklis; Pan, Long</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-12-18</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">408</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ntis.gov/search/product.aspx?ABBR=AD786938"> <span id="translatedtitle">Liquidus-Solidus Determinations in the System Mg<span class="hlt">Al</span>2O4 - <span class="hlt">Al</span>2O3.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ntis.gov/search/index.aspx">National Technical Information Service (NTIS)</a></p> <p class="result-summary">The high-temperature portion of the system Mg<span class="hlt">Al</span>2O4-<span class="hlt">Al</span>2O3 has been reinvestigated using a graphite resistance furnace under Ar. The melting points of <span class="hlt">Al</span>2O3 and Mg<span class="hlt">Al</span>2O4 were measured to be 2045 and 2085C respectively. A 'divorced eutectic microstructure' wa...</p> <div class="credits"> <p class="dwt_author">D. J. Viechnicki F. Schmid J. W. McCauley</p> <p class="dwt_publisher"></p> <p class="publishDate">1973-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">409</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013JKPS...63.1625J"> <span id="translatedtitle">Growth and characterization of a high-quality <span class="hlt">Al</span>0.45Ga0.55N layer with <span class="hlt">AlGaN/Al</span>N superlattices</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">We report the growth and characterization of a Si-doped, n-type <span class="hlt">Al</span>GaN layer with 45% <span class="hlt">Al</span> composition. For the application of n-type <span class="hlt">Al</span>GaN layers with high <span class="hlt">Al</span> compositions in ultraviolet emitters, we fabricated an n-<span class="hlt">Al</span>0.45Ga0.55N layer with high crystalline quality and high electrical conductivity by inserting <span class="hlt">Al</span>0.85Ga0.15N/<span class="hlt">Al</span>N superlattices (SLs) to prevent cracks prior to growing the n-type <span class="hlt">Al</span>GaN layer. The dislocation density in the n-<span class="hlt">Al</span>GaN layer with a 45% <span class="hlt">Al</span> composition and SLs was less than 2.4 × 1010 cm-2, which was lower than the dislocation density of 5.3 × 1010 cm-2 for the n-<span class="hlt">Al</span>GaN layer without SLs. The resistivity, mobility, and free-electron concentration in the n-type <span class="hlt">Al</span>0.45Ga0.55N layer with SLs were 2.2 × 10-2 ?·cm, 55.0 cm2/V-s, and 5.0 × 1018 cm-3 at room temperature, respectively.</p> <div class="credits"> <p class="dwt_author">Jeon, Seong-Ran; Park, Si-Hyun</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-10-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">410</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/1992JCrGr.118..314T"> <span id="translatedtitle">Analytical investigations of ?-<span class="hlt">Al</span> 2O 3 and ??-<span class="hlt">Al</span> 2O 3 crystals</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Crystals of the solid electrolytes Na +-?-alumina and Na +-??-alumina have been synthesized by high temperature solution growth in Na 2O rich fluxes between 1600 and 1700°C. Chemical analysis revealed varying compositions due to a solid solution for both materials. The mean compositions (Na 1.62<span class="hlt">Al</span> 11O 17.31 for Na +-?-<span class="hlt">Al</span> 2O 3 and Na 1.41Mg 0.62<span class="hlt">Al</span> 10.45O 17 for Na +-??-<span class="hlt">Al</span> 2O 3) determined by electron probe microanalysis (EPMA) indicate untypical sodium contents for these compounds than described usually. For the analytical measurements certain conditions have to be observed because of the high sodium mobility in these materials.</p> <div class="credits"> <p class="dwt_author">Tietz, F.; Koepke, J.; Urland, W.</p> <p class="dwt_publisher"></p> <p class="publishDate">1992-04-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">411</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/17654976"> <span id="translatedtitle">Synthesis and characterization of <span class="hlt">Al-Zn/Al</span>2O3 nano-powder composites.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Composites consisting of <span class="hlt">Al-Zn/Al</span>2O3 have been synthesized using high energy mechanical milling. High energy ball milling increases the sintering rate of the composite powder due to increased diffusion rate. Owing to the finer microstructure, the hardness of the sintered composite produced by using the mechanically milled nanocomposite powder is significantly higher than that of the sintered composite produced by using the as-mixed powder. The mean crystallite size of the matrix has been determined to be 27 nm by Scherrer equation using X-ray diffraction data. The powders have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and differential thermal analysis (DTA). The effect of high-energy ball milling and subsequent annealing on a mixture of <span class="hlt">Al</span> and ZnO has also been investigated. DTA result show that the reaction temperature of <span class="hlt">Al</span>-ZnO decreases with the increase in the ball milling time. PMID:17654976</p> <div class="credits"> <p class="dwt_author">Durai, T G; Das, Karabi; Das, Siddhartha</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">412</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/1991MTA....22.2837C"> <span id="translatedtitle">Calculation of phase diagrams and solidification paths of <span class="hlt">Al</span>-rich <span class="hlt">Al</span>-Li-Cu alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Thermodynamic models for the various phases in the <span class="hlt">Al</span>-rich corner of the <span class="hlt">Al</span>-Li-Cu system were developed on the basis of the phase equilibrium and limited thermodynamic data available in the literature and the thermodynamic descriptions of the three consitituent binary systems, <span class="hlt">Al</span>-Li, <span class="hlt">Al</span>-Cu, and Cu-Li. The calculated isothermal section at several temperatures and the liquidus projection are in ageement with the experimental determinations. Combining the thermodynamic models and the Scheil model or the modified Scheil model to incllude solidstate back-diffusion, quantitative solidification paths were predited. The calculated amount of the primary phase formed during solidification was compared with those obtained experimentally.</p> <div class="credits"> <p class="dwt_author">Chen, Sinn-Wen; Chuang, Ying-Yu; Austin Chang, Y.; Chu, Men G.</p> <p class="dwt_publisher"></p> <p class="publishDate">1991-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">413</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19930070119&hterms=FGM&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D10%26Ntt%3DFGM"> <span id="translatedtitle">Fabrication and properties of functionally graded Ni<span class="hlt">Al/Al</span>2O3 composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">A modified sedimentation process was used in the production of a functionally gradient material (FGM), Ni<span class="hlt">Al/Al</span>2O3. A simple finite element model was used to guide our design and fabrication efforts by estimating residual stress states as a function of composite structure. This approach could lead to tailored designs that enhance or avoid specific residual stress states. Thermal cycling tests were factored into the model to predict time dependent or steady-state internal temperature and stress profiles. Four-point bend tests were conducted to establish the mechanical load-displacement behavior of a single interlayer FGM at room temperature, 800 and 1000 K. Room temperature bend strength of the FGM was 3-4 times that of the base Ni<span class="hlt">Al</span>. At elevated temperatures, composite fracture occurred in a gradual, noncatastrophic mode involving Ni<span class="hlt">Al</span> retardation of a succession of cracks originating in the alumina face.</p> <div class="credits"> <p class="dwt_author">Miller, D. P.; Lannutti, J. J.; Noebe, R. D.</p> <p class="dwt_publisher"></p> <p class="publishDate">1993-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">414</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013JAP...114u3506M"> <span id="translatedtitle">Energy localization on the <span class="hlt">Al</span> sublattice of Pt3<span class="hlt">Al</span> with L12 order</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">A three-dimensional molecular-dynamics model of Pt3<span class="hlt">Al</span> with L1 order was developed and found to support the excitation of discrete breathers (DBs) and energy localization on the <span class="hlt">Al</span> sublattice. For an initial lattice temperature of 0 K, large-amplitude DBs polarized along [100] are found to be very weakly damped, retaining most of their initial energy for more than 1000 cycles, while DBs polarized along [111] damped out over ˜15 cycles. Because the DBs and their dissipation channels are confined to the <span class="hlt">Al</span> sublattice, long-lived nonequilibrium states with large energy differences between the <span class="hlt">Al</span> and Pt sublattices occur. Since collisions during irradiation more efficiently generate lattice vibrations in light atoms than heavy atoms, such nonequilibrium states may occur and alter the relaxation processes occurring during radiation damage.</p> <div class="credits"> <p class="dwt_author">Medvedev, N. N.; Starostenkov, M. D.; Manley, M. E.</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">415</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19880043042&hterms=al2o3&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dal2o3"> <span id="translatedtitle">Adherent <span class="hlt">Al</span>2O3 scales produced on undoped NiCr<span class="hlt">Al</span> alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">Repeated oxidation and polishing of high purity Ni-15Cr-13<span class="hlt">Al</span> has dramatically changed its cyclic oxidation behavior from nonadherent to adherent. No apparent change in scale phase, morphology or interface structure occurred during this transition, dismissing any mechanism based on pegging, vacancy sink, or growth stress. The principle change that did occur was a reduction in the sulfur content from 10 ppmw to 3 ppmw after 25 cycles at 1120 C. These observations are used to support the model of <span class="hlt">Al</span>2O3 scale adherence put forth by Smeggil et <span class="hlt">al</span>. which claims that <span class="hlt">Al</span>2O3 scale spallation occurs due to sulfur segregation and bond deterioration at the oxide-metal interface.</p> <div class="credits"> <p class="dwt_author">Smialek, James L.</p> <p class="dwt_publisher"></p> <p class="publishDate">1986-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">416</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2012JAP...111h3505Y"> <span id="translatedtitle">First-principles study of shear behavior of <span class="hlt">Al</span>, TiN, and coherent <span class="hlt">Al</span>/TiN interfaces</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">In this ab initio work, density functional theory was used to calculate the ideal shear strengths of pure <span class="hlt">Al</span>, pure TiN, the <span class="hlt">Al</span>/TiN interfacial region, and <span class="hlt">Al</span>/TiN multilayers. The ideal shear strength of the <span class="hlt">Al</span>/TiN interface was found to vary from very low (on the order of the ideal shear strength of <span class="hlt">Al</span>) to very high (on the order of the ideal shear strength of TiN), depending on whether the TiN at the interface was Ti- or N-terminated, respectively. The results suggest that the shear properties of <span class="hlt">Al</span>/TiN depend strongly on the chemistry of the interface, <span class="hlt">Al</span>:N versus <span class="hlt">Al</span>:Ti terminations. Nevertheless, for the <span class="hlt">Al</span>/TiN multilayers, the ideal shear strength was limited by shear in the <span class="hlt">Al</span> layer away from the interface, even when the individual layer thickness is less than a nanometer.</p> <div class="credits"> <p class="dwt_author">Yadav, S. K.; Ramprasad, R.; Misra, A.; Liu, X.-Y.</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-04-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">417</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40067366"> <span id="translatedtitle">Defect Band Characteristics in Mg-<span class="hlt">Al</span> and <span class="hlt">Al</span>-Si High-Pressure Die Castings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Bands of positive macrosegregation and porosity commonly follow the surface contour of components produced by high-pressure\\u000a die casting (HPDC). In this article, <span class="hlt">Al</span> alloy <span class="hlt">Al</span>Si7Mg and Mg alloys AZ91 and AM60 were cast into tensile test bars using cold-chamber\\u000a (cc) HPDC. Microstructural characterization revealed that externally solidified crystals (ESCs) are not necessary for defect\\u000a band formation, and that defect bands</p> <div class="credits"> <p class="dwt_author">C. M. Gourlay; H. I. Laukli; A. K. Dahle</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">418</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/53702460"> <span id="translatedtitle">Tribological properties of thermally sprayed Ti<span class="hlt">Al-Al</span>2O3 composite coating</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The use of thermal spray coatings provides protection to the surfaces operating in severe environments. The main goal of the current work is to investigate the possibility of using a high velocity oxy fuel (HVOF) thermally sprayed wear resistant Ti<span class="hlt">Al\\/Al</span>2O3 coating on tool steel (H13) which is used for making dies for aluminium high pressure die casting. A feedstock of</p> <div class="credits"> <p class="dwt_author">A. Salman; B. Gabbitas; J. Li; D. Zhang</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">419</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/11207932"> <span id="translatedtitle">Transmission electron microscopy studies of squeeze cast <span class="hlt">Al-Al</span>N composites.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Aluminium-matrix composites containing approximately 45 vol.% <span class="hlt">Al</span>N particles were fabricated by melt infiltration of aluminium into an <span class="hlt">Al</span>N preform under a pressure up to 130 MPa. Three types of aluminium alloy (2024, 6060 and 5754) were used. The as-prepared composites were studied by light microscopy, scanning and transmission electron microscopies, and energy-dispersive X-ray spectroscopy. As a result of the melt infiltration process, the composites are very dense and the microstructure shows a homogeneous distribution of the reinforcement. The interfaces are clean with very little porosity. Composites with 2024 and 6060 matrices were carefully studied by transmission electron microscopy (TEM) and high resolution electron microscopy (HREM) after heat treatments. Dislocation density in the matrix of the reinforced material increases due to the difference in thermal expansion coefficients of aluminium alloys and <span class="hlt">Al</span>N. This can induce an accelerated ageing response of the coherent and semicoherent precipitations of age-hardened matrices. This behaviour has been studied in the 2024 and 6060 composites by using microhardness measurements and TEM. Reactions between the <span class="hlt">Al</span>N reinforcement and aluminium matrices (6060 and 5754) were observed and analysed by TEM. Matrices containing some of magnesium display a Mg<span class="hlt">Al</span>2O4 spinel formation at the <span class="hlt">Al</span>N/matrix interface. The spinel formation is probably due to the reaction between magnesium of the matrix and the thin <span class="hlt">Al</span>2O3 layer on the <span class="hlt">Al</span>N surfaces. This reaction can affect the mechanical behaviour of the composite infiltrated with the 5754 matrix. This has been confirmed by overageing some samples at high temperatures (300 degrees C and 550 degrees C) for 10 days in order to emphasize the interfacial reactions. PMID:11207932</p> <div class="credits"> <p class="dwt_author">Chédru, M.; Vicens, J.; Chermant, J. L.; Mordike, B. L.</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">420</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/18636005"> <span id="translatedtitle">Tribological Properties of Ti(<span class="hlt">Al,O)\\/Al</span>2O3 Composite Coating by Thermal Spraying</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The use of thermal spray coatings provides protection to the surfaces operating in severe environments. The main goal of the current work is to investigate the possibility of using a high velocity air fuel (HVAF) thermally sprayed wear resistant Ti(<span class="hlt">Al,O)\\/Al</span>2O3 coating on tool steel (H13) which is used for making dies for aluminium high pressure die casting and dummy blocks</p> <div class="credits"> <p class="dwt_author">Asma Salman; Brian Gabbitas; Peng Cao; Deliang Zhang</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_20");' href="#" title="Previous Page"> 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href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_23");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">421</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/39872746"> <span id="translatedtitle">Mechanical properties of an <span class="hlt">Al\\/Mg\\/Al</span> trilaminated composite fabricated by hot rolling</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">An <span class="hlt">Al\\/Mg\\/Al</span> composite with a trilaminate structure was fabricated by hot rolling and its mechanical properties at quasi-static\\u000a rates of strain were investigated. The bonding strength of the trilaminated composite is about 40 MPa, mainly attributing\\u000a to the mechanical bond at the interfaces. The first layer failure strength of the laminated composite increases from 305 to\\u000a 372 MPa when the relative thickness</p> <div class="credits"> <p class="dwt_author">X. P. ZhangT; T. H. Yang; J. Q. Liu; X. F. Luo; J. T. Wang</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">422</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/59027217"> <span id="translatedtitle">Experimental studies on the ignition of single Ni\\/<span class="hlt">Al</span>, Fe\\/<span class="hlt">Al</span>, and Ti particles</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The work presented here focuses on the ignition of single Ni- and Fe-coated <span class="hlt">Al</span> particles in pure CO2 and Ar atmospheres and Ti particles in O2\\/N2 and O2\\/Ar environments. The importance of studying Ni- and Fe-coated <span class="hlt">Al</span> particles is related to their potential use in propulsion and materials synthesis applications. Meanwhile, Ti combustion may be utilized to eliminate hazardous chemical</p> <div class="credits"> <p class="dwt_author">Timothy Al Andrzejak</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">423</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.materialsaustralia.com.au/lib/pdf/materials_forum/volume28/gp%2037.pdf"> <span id="translatedtitle">Corrosion Behavior of Twin-Roll Cast <span class="hlt">Al</span>-Mg and <span class="hlt">Al</span>-Mg-Si Alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary"><span class="hlt">Al</span>Mg and <span class="hlt">Al</span>MgSi alloys are used for automotive applications, where a good corrosion resistance is required. Recently, there has been a growing interest in using strip casting as a method to produce low-cost aluminum sheet for automotive applications. The present work was undertaken to investigate the corrosion behavior of twin-roll cast AA5754 and AA6016 sheet for panel applications, on the</p> <div class="credits"> <p class="dwt_author">Feriha Birol; Yucel Birol</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">424</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/h5rt75086kk12560.pdf"> <span id="translatedtitle">laser cladding of Ni<span class="hlt">Al</span> bronze on <span class="hlt">Al</span> alloy AA333</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The present study investigates the effects of laser-processing parameters, such as laser power, traverse speed, powder-feed\\u000a rate, and flow rate and species of assisting gas, and material prop-erties, such as substrate surface condition, on laser\\u000a cladding of Ni-<span class="hlt">Al</span> bronze on <span class="hlt">Al</span> alloy AA333. The proper processing parameters were determined experimentally and are discussed\\u000a in terms of their effects on laser-clad</p> <div class="credits"> <p class="dwt_author">Y. Liu; J. Mazumder; K. Shibata</p> <p class="dwt_publisher"></p> <p class="publishDate">1994-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">425</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/40067308"> <span id="translatedtitle">Strain Rates and Grain Growth in <span class="hlt">Al</span> 5754 and <span class="hlt">Al</span> 6061 Friction Stir Spot Welds</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The stir zone temperature and microstructures are compared in friction stir spot welds produced in <span class="hlt">Al</span> 5754 and <span class="hlt">Al</span> 6061 alloys.\\u000a Electron backscattered diffraction was used to determine the relationship between tool rotation speed during welding and final\\u000a stir zone grain size. Comparison of the grain sizes in rapidly quenched welds with those in air-cooled joints confirmed that\\u000a grain growth</p> <div class="credits"> <p class="dwt_author">A. Gerlich; M. Yamamoto; T. H. North</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">426</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/46495732"> <span id="translatedtitle">Effect of shape variations on the structure of directionally solidified <span class="hlt">Al-Al</span> 3 Ni composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The effect on structure of some of the possible changes in shape of directionally solidified <span class="hlt">Al-Al</span>3Ni eutectic composites has been studied for two growth conditions. The shape changes investigated included both contraction\\u000a and divergence in cross-section of the grown part, as well as 90 deg bends in the center-line of the composites. The experimental\\u000a results showed that contractions in the</p> <div class="credits"> <p class="dwt_author">Mahmoud M. Farag; Merton C. Flemings</p> <p class="dwt_publisher"></p> <p class="publishDate">1976-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">427</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/53259801"> <span id="translatedtitle">Magnetic properties and high frequency characteristics of sputtered Fe<span class="hlt">Al</span> and Fe<span class="hlt">Al</span>B</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The magnetic properties and high frequency characteristics of sputtered Fe81<span class="hlt">Al</span>19 and Fe81<span class="hlt">Al</span>10B9 thin films have been investigated. The above two thin films were sputtered at different oblique deposition angles in order to induce magnetic anisotropy in the film. The saturation magnetization of the films is easily above 12 kG, while the coercivity and the magnetic anisotropy field of the films</p> <div class="credits"> <p class="dwt_author">C. C. Hsieh; M. Y. Jian; H. W. Chang; X. G. Zhao; W. C. Chang</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">428</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/6537542"> <span id="translatedtitle">Reliable <span class="hlt">AlInGaAs/Al</span>GaAs strained-layer diode lasers</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">A semiconducting diode laser is described comprising: a GaAs substrate; and an <span class="hlt">Al</span>InGaAs alloy active layer positioned between <span class="hlt">Al</span>GaAs confining layers; said active layer and said confining layers further positioned between GaAs contact layers so as to form a contact/confining/active/confining/contact multilayer structure, said multilayer structure secured to the substrate through one of the contact layers.</p> <div class="credits"> <p class="dwt_author">Wang, C.A.; Walpole, J.N.; Hong K. Choi; Donnelly, J.P.</p> <p class="dwt_publisher"></p> <p class="publishDate">1993-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">429</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/60069634"> <span id="translatedtitle">Kinetic energy distributions of sputtered neutral aluminum clusters: <span class="hlt">Al--Al</span>[sub 6</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Neutral aluminum clusters sputtered from polycrystalline aluminum were analyzed by laser postionization time-of-flight (TOF) mass spectrometry. The kinetic energy distributions of <span class="hlt">Al</span> through <span class="hlt">Al</span>[sub 6] were measured by a neutrals time-of-flight technique. The interpretation of laser postionization TOF data to extract velocity and energy distributions is presented. The aluminum cluster distributions are qualitatively similar to previous copper cluster distribution measurements</p> <div class="credits"> <p class="dwt_author">S. R. Coon; W. F. Calaway; M. J. Pellin; G. A. Curlee; J. M. White</p> <p class="dwt_publisher"></p> <p class="publishDate">1992-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">430</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/46501058"> <span id="translatedtitle">Solution kinetics of Cu<span class="hlt">Al</span> 2 in an <span class="hlt">Al</span>4Cu alloy</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The results of a recently-developed, spherical, finite geometry, mathematical model using numerical methods are compared to\\u000a existing closed-form models. The geometry and boundary conditions imposed by the closed-form models are shown to be restrictive\\u000a in the application of these models to the solution kinetics of second phases. A quantitative metallography study of the solution\\u000a kinetics of Cu<span class="hlt">Al</span>2 in an <span class="hlt">Al</span>-4</p> <div class="credits"> <p class="dwt_author">D. L. Baty; R. A. Tanzilli; R. W. Heckel</p> <p class="dwt_publisher"></p> <p class="publishDate">1970-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">431</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/5920228"> <span id="translatedtitle">Structure analysis of Ni<span class="hlt">Al</span> martensite</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Neutron elastic scattering experiments were performed in order to investigate the structure of the low temperature martensitic phase of Ni/sub 62.5/<span class="hlt">Al</span>/sub 37.5/ alloy. The average structure analyzed from the integrated intensity was approximately described by the (5,/minus/2) structure proposed by Martynov et <span class="hlt">al</span>. Small deviation from the exact (5,/minus/2) model in the positional parameters and the anomalously large Debye-Waller factor were obtained. The observed satellite profiles show asymmetrical broadening, and the peak positions shift from the regular reciprocal lattice points. These anomalous features of scattering profiles were tentatively interpreted by introducing spatial modulation of the strain and order parameters. 12 refs., 2 figs., 1 tab.</p> <div class="credits"> <p class="dwt_author">Noda, Y.; Shapiro, S.M.; Shirane, G.; Yamada, Y.; Fuchizaki, K.; Tanner, L.E.</p> <p class="dwt_publisher"></p> <p class="publishDate">1989-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">432</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/960677"> <span id="translatedtitle">Observable Proxies For 26 <span class="hlt">Al</span> Enhancement</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">We consider the cospatial production of elements in supernova explosions to find observationally detectable proxies for enhancement of {sup 26}<span class="hlt">Al</span> in supernova ejecta and stellar systems. Using four progenitors we explore a range of 1D explosions at different energies and an asymmetric 3D explosion. We find that the most reliable indicator of the presence of {sup 26}<span class="hlt">Al</span> in unmixed ejecta is a very low S/Si ratio ({approx} 0.05). Production of N in O/S/Si-rich regions is also indicative. The biologically important element P is produced at its highest abundance in the same regions. Proxies should be detectable in supernova ejecta with high spatial resolution multi wavelength observations, but the small absolute abundance of material injected into a proto-planetary disk makes detection unlikely in existing or forming stellar/planetary systems.</p> <div class="credits"> <p class="dwt_author">Fryer, Christopher L [Los Alamos National Laboratory; Young, Patrick A [Los Alamos National Laboratory; Ellinger, Carola I [ASU; Arnett, William D [UNIV ARIZONA</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">433</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013APS..APR.H9003B"> <span id="translatedtitle">Polarized Cold Neutron Capture in ^27<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The NPDGamma Experiment at the Spallation Neutron Source at ORNL is measuring the parity-odd correlation between the neutron spin and the direction of the emitted photon in the capture of cold neutrons on a 16-liter liquid parahydrogen target. The goal is to determine the strength of the weak nucleon-nucleon interaction. One of the main background contributions comes from the gamma rays produced by neutrons captured in the <span class="hlt">Al</span> walls of the target vessel. To quantify this effect a commissioning experiment measured the parity-odd and parity-even asymmetries in the angular distribution of the gamma rays from the capture of polarized cold neutrons in a solid <span class="hlt">Al</span> target. A status of the analysis of this experiment will be presented.</p> <div class="credits"> <p class="dwt_author">Balascuta, Septimiu</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-04-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">434</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19790025087&hterms=xdata&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3Dxdata"> <span id="translatedtitle">Development of Si<span class="hlt">Al</span>ON materials</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">Cold pressing and sintering techniques were used to produce ceramic test specimens in which the major phase was either Si3N4 or a solid solution having the beta Si3N4 structure. Additional components were incorporated to promote liquid phase sintering. Glass and/or crystalline phase were consequently retained in boundaries between Si3N4 grains which largely determined the physical properties of the bodies. Systems investigated most extensively included R-Si-<span class="hlt">Al</span>-O-N (R = rare earth element) Zr-Si-<span class="hlt">Al</span>-O-N, Y-Si-Be-O-N, and R1-R2-Si-O-N. Room temperature and 1370 C modulus of ruptured, 1370 C creep, and oxidation behavior are discussed in terms of phase relationships in a parent quinery, and relavent oxide systems.</p> <div class="credits"> <p class="dwt_author">Layden, G. K.</p> <p class="dwt_publisher"></p> <p class="publishDate">1979-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">435</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24292005"> <span id="translatedtitle">[Communication with <span class="hlt">ALS</span> patients: neurosurgical approach].</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">By progression of the disease, motor neurons degenerate in patients with amyotrophic lateral sclerosis (<span class="hlt">ALS</span>) eventually lose nearly all voluntary muscles in the body. They are awake and aware but cannot move or communicate (locked-in state). Since the function of the brain is preserved, one possible measure to support their communication is to interpret their motor intention by decoding (deciphering) brain signals and present it with external devices. This technology called "brain-machine interface (BMI)" is now close to clinical use in Japan and USA.In our system, we record electrocorticogram (ECoG) obtained with subudural electrodes during their motor imagery, decode it and determine the movement they intended. So far, one patient of <span class="hlt">ALS</span> with severe paralysis, implanted with this electrodes, successfully operated the PC communication tool only by thinking. PMID:24292005</p> <div class="credits"> <p class="dwt_author">Yoshimine, Toshiki; Yanagisawa, Takufumi; Sawada, Jin-Ichi; Hazama, Takanori; Mochizuki, Hideki; Hirata, Masayuki</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">436</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2000JAP....88.5865C"> <span id="translatedtitle">Hot electron transport in <span class="hlt">Al</span>N</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The energy distribution of electrons that were transported through a thin intrinsic <span class="hlt">Al</span>N film was directly measured as a function of the applied field. The measurements were realized by extracting the electrons into vacuum through a semitransparent Au contact and measuring their energies using an electron spectrometer. At moderate applied fields (100 kV/cm), the energy distribution was found to follow a Maxwellian model corresponding to a temperature of 2700 K and a drift component below the spectrometer resolution. At higher fields, intervalley scattering was evidenced by the presence of a second peak at 0.7 eV. This coincides well with the energy position of the LM valleys in <span class="hlt">Al</span>N.</p> <div class="credits"> <p class="dwt_author">Collazo, R.; Schlesser, R.; Roskowski, A.; Davis, R. F.; Sitar, Z.</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">437</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/41130808"> <span id="translatedtitle">Characterization of <span class="hlt">Al</span> 2O 3–<span class="hlt">Al</span> nano-composite powder prepared by a wet chemical method</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">A wet chemical method was used to prepare <span class="hlt">Al</span>2O3-coated <span class="hlt">Al</span> nano-size-composite powders using <span class="hlt">Al</span>, aluminum nitrate and ammonia as the starting materials. TEM, SEM, TG\\/DSC, zeta potential, XPS, X-ray were used to characterize the composite powders. Results showed that a uniform thin <span class="hlt">Al</span>(OH)3 layer can formed on the surface of <span class="hlt">Al</span> particles. After calcined at 1000°C for 2h, the thin</p> <div class="credits"> <p class="dwt_author">Hong-xia Lu; Jie Hu; Chang-ping Chen; Hong-wei Sun; Xing Hu; De-lin Yang</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">438</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/49257013"> <span id="translatedtitle">Formation mechanism of in situ <span class="hlt">Al</span> 3Ti in <span class="hlt">Al</span> matrix during hot pressing and subsequent friction stir processing</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">In situ <span class="hlt">Al</span>3Ti\\/<span class="hlt">Al</span> composites were fabricated by a combination of vacuum hot pressing (VHP) and friction stir processing (FSP). The formation mechanism of the <span class="hlt">Al</span>3Ti and the effect of VHP and FSP parameters on the resultant microstructure and mechanical properties were investigated. The <span class="hlt">Al</span>3Ti formed due to the reactive diffusion between <span class="hlt">Al</span> and Ti during VHP, and the number of</p> <div class="credits"> <p class="dwt_author">Q. Zhang; B. L. Xiao; D. Wang; Z. Y. Ma</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">439</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/26624950"> <span id="translatedtitle">Thermal analysis of phase transformation kinetics in ?-<span class="hlt">Al</span> 2O 3 seeded boehmite and ?-<span class="hlt">Al</span> 2O 3</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The effect of ?-<span class="hlt">Al</span>2O3 seeding on the transformation kinetics of high purity commercial boehmite and ?-<span class="hlt">Al</span>2O3 was investigated. The effect of seed size, powder purity, sample homogeneity, and sample density on the transformation kinetics are discussed. The temperature and activation energy of the ? to ?-<span class="hlt">Al</span>2O3 phase transformation decreases for boehmite and ?-<span class="hlt">Al</span>2O3 powders with an appropriate addition of ?-<span class="hlt">Al</span>2O3</p> <div class="credits"> <p class="dwt_author">C. Scott Nordahl; Gary L. Messing</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">440</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/39798981"> <span id="translatedtitle">Monitoring <span class="hlt">ALS</span>1 and <span class="hlt">ALS</span>3 Gene Expression During In Vitro Candida albicans Biofilm Formation Under Continuous Flow Conditions</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary"><span class="hlt">ALS</span>1 and <span class="hlt">ALS</span>3 encode cell-surface associated glycoproteins that are considered to be important for Candida albicans biofilm formation. The main goal of the present study was to monitor <span class="hlt">ALS</span>1 and <span class="hlt">ALS</span>3 gene expression during C. albicans biofilm formation (on silicone) under continuous flow conditions, using the Centers for Disease Control biofilm reactor (CDC\\u000a reactor). For <span class="hlt">ALS</span>1, we found few changes in</p> <div class="credits"> <p class="dwt_author">Heleen Nailis; Roosmarijn Vandenbroucke; Kelly Tilleman; Dieter Deforce; Hans Nelis; Tom Coenye</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_21");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a 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href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a style="font-weight: bold;">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_24");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">441</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/g6877536160r556h.pdf"> <span id="translatedtitle">Investigation of the dynamic Young's modulus and vibration damping for cryomilled Ni<span class="hlt">Al–Al</span>N composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Measurements were made of the dynamic Young's modulus (stiffness) and damping for Ni<span class="hlt">Al</span> specimens containing varying amounts of aluminium nitride and prepared by cryomilling. Five specimens of Ni<span class="hlt">Al–Al</span>N were measured at room temperature, each specimen having a different percentage of <span class="hlt">Al</span>N in the range 1%–30%. Further measurements were made on the 1% and 30% <span class="hlt">Al</span>N specimens for the temperature range</p> <div class="credits"> <p class="dwt_author">A Wolfenden; D. A Coan; M. G Hebsur</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">442</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/48748641"> <span id="translatedtitle">Influence of Cr on the Oxidation of Fe3<span class="hlt">Al</span> and Ni3<span class="hlt">Al</span> at 500°C</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The influence of chromium on the mechanical properties of the aluminides Fe3<span class="hlt">Al</span> and Ni3<span class="hlt">Al</span> has been studied extensively. In order to evaluate the role of Cr during the early stages of oxidation, Fe3<span class="hlt">Al</span> and Ni3<span class="hlt">Al</span> containing 2 and 4 at.% Cr were oxidized in dry air at 500°C for 6, 50, and 100 hr. The oxide scale on Fe3<span class="hlt">Al</span> consists</p> <div class="credits"> <p class="dwt_author">A. Velon; D.-Q. Yi</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">443</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/41021627"> <span id="translatedtitle">Grain refinement and superplasticity in 5083 <span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">A preliminary investigation of thermomechanical processing of 5083 aluminum plate (<span class="hlt">Al</span>-4.7%Mg-0.7%Mn) was undertaken to develop a fine-grain sheet for superplastic forming applications. Significant differences in grain size and the extent of superplasticity are seen in hot-rolled vs. cold-rolled sheets, with tensile elongations exceeding 600% for the cold-rolled alloy. Additionally, a separate fine-grain sheet of the same alloy, produced by Alusuisse</p> <div class="credits"> <p class="dwt_author">R. Verma; A. K. Ghosh; S. Kim; C. Kim</p> <p class="dwt_publisher"></p> <p class="publishDate">1995-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">444</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/53112248"> <span id="translatedtitle">Hydrogen Solubility in <span class="hlt">Al</span>-bearing Perovskite</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">It is generally accepted that silicate perovskite is the dominant mineral in the Earth's lower mantle. Previous studies have been completed to determine the physical and chemical characteristics of the pure end-member MgSiO3. Recent studies have shown that the addition of <span class="hlt">Al</span> to MgSiO3 can have a significant effect on the material properties of the mineral, such as compressibility, and</p> <div class="credits"> <p class="dwt_author">H. C. Watson; M. J. Krawczynski; Y. Fei</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">445</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/5197016"> <span id="translatedtitle">Commissioning experiences of the <span class="hlt">ALS</span> booster synchrotron</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">Installation of the <span class="hlt">ALS</span> booster synchrotron proper was completed on April 30, 1991, and commissioning has just begun. Circulating beam around the booster was observed on the first day of operation, May 3, 1991. The beam was visible for about 400 turns. In this paper we describe the status and commissioning experience of the 1.5-GeV electron synchrotron accelerator. 14 refs., 2 figs., 4 tabs.</p> <div class="credits"> <p class="dwt_author">Kim, C.</p> <p class="dwt_publisher"></p> <p class="publishDate">1991-05-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">446</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/1990ZPhyA.335..393S"> <span id="translatedtitle">Fluctuation properties of states in26<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The fluctuation properties of the energy levels of26<span class="hlt">Al</span> from the ground state to excitation energies of about 8 MeV have been examined. Several statistics have been employed, and particular attention has been given to the suitability of these statistics for small sample sizes. The results show, for a variety of states, behavior intermediate between GOE and Poisson but apparently favoring GOE. The results are consistent with the fluctuations' being independent of isospin.</p> <div class="credits"> <p class="dwt_author">Shriner, J. F.; Bilpuch, E. G.; Endt, P. M.; Mitchell, G. E.</p> <p class="dwt_publisher"></p> <p class="publishDate">1990-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">447</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/47704314"> <span id="translatedtitle">Indentation Tests on <span class="hlt">Al</span> Matrix Syntactic Foams</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">This paper investigates mechanical response of <span class="hlt">Al</span> matrix syntactic foams manufactured by pressure infiltration casting under\\u000a indentation test. Syntactic foams with ceramic microspheres of three different particle sizes and inner structures were manufactured\\u000a and tested. Because the hollow microspheres are stronger than the porous ones, the syntactic foam with hollow microspheres\\u000a has a higher compressive strength than that of the</p> <div class="credits"> <p class="dwt_author">X. F. Tao; G. K. Schleyer; Y. Y. Zhao</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">448</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/u6j5026074320p67.pdf"> <span id="translatedtitle">Die Triangulation <span class="hlt">als</span> Methode in der Politikwissenschaft</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Die Forderung nach „Methodenpluralismus“ scheint in jüngster Zeit den „Methodenstreit“ sowohl zwischen Befürwortern qualitativer\\u000a und quantitativer Techniken (Kelle 2007: 25-46) <span class="hlt">als</span> auch innerhalb der quantitativen Forschungstradition zwischen Nutzern von Aggregat- und Individualdaten abgelöst zu\\u000a haben. So ist einerseits die letztere Auseinandersetzung zumindest auf der methodischen Ebene gelöst worden, nachdem sich\\u000a die Verwendung der Mehrebenenanalyse (Raudenbusch\\/ryk 2002; Engel 1998; Langer 2004)</p> <div class="credits"> <p class="dwt_author">Susanne Pickel</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">449</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2010AIPC.1304..411S"> <span id="translatedtitle">?-decay of 23<span class="hlt">Al</span> and nova nucleosynthesis</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">We have studied the ?-decay of 23<span class="hlt">Al</span> with a novel detector setup at the focal plane of the MARS separator at the Texas A&M University to resolve existing controversies about the proton intensities of the IAS in 23Mg and to determine the absolute proton branching ratios by combining our results to the latest ?-decay data. Experimental technique, results and the relevance for nova nucleosynthesis are discussed.</p> <div class="credits"> <p class="dwt_author">Saastamoinen, A.; Trache, L.; Banu, A.; Bentley, M. A.; Davinson, T.; Hardy, J. C.; Iacob, V. E.; Jenkins, D. G.; Jokinen, A.; McCleskey, M.; Roeder, B.; Simmons, E.; Tabacaru, G.; Tribble, R. E.; Woods, P. J.; Äystö, J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-11-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">450</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/52748702"> <span id="translatedtitle">Fermi surface of La<span class="hlt">Al</span>2</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">A result is reported of a calculation of the energy bandstructure and the Fermi surface for the cubic Laves-phase La<span class="hlt">Al</span>2 by an APW method. To improve on a previous calculation by Switendick (1973) the energy bandstructure has been calculated self-consistently with the local-spin-density approximation and a relativistic approximation. The tenth band Fermi surface is a sphere centred at the Gamma</p> <div class="credits"> <p class="dwt_author">A. Hasegawa; A. Yanase</p> <p class="dwt_publisher"></p> <p class="publishDate">1980-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">451</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.springerlink.com/index/q38625w825175341.pdf"> <span id="translatedtitle">Alkali adsorption on the <span class="hlt">Al</span>(001) surface</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">The chemisorption of Na on the <span class="hlt">Al</span>(001) surface has been studied by 2D bandstructure calculations on slab models using a density functional STO-LCAO method. Two slab models of three and five layers of substrate atoms have been used. Overlayers of the structuresp(2×2),c(2×2) andp(1×1), representing coverages of a quarter, a half and a full atomic monolayer of sodium atoms, respectively, have</p> <div class="credits"> <p class="dwt_author">B. Reichert; N. Rüsch</p> <p class="dwt_publisher"></p> <p class="publishDate">1992-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">452</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/41021741"> <span id="translatedtitle">Silicide precipitation strengthened Ti<span class="hlt">Al</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Precipitation of a titanium silicide Ti5Si3 was found to be beneficial to improvement of the creep resistance of a fully lamellar Ti-48<span class="hlt">Al</span>-1.5Cr cast alloy without the sacrifice of tensile properties. The addition of 0.26–0.65 mol% Si generates fine precipitates less than 200 nm in size during aging at 900 °C for 5 h. The precipitates are effective obstacles to dislocation</p> <div class="credits"> <p class="dwt_author">T. Noda; M. Okabe; S. Isobe; M. Sayashi</p> <p class="dwt_publisher"></p> <p class="publishDate">1995-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">453</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3472785"> <span id="translatedtitle">Room Temperature Radiolytic Synthesized Cu@Cu<span class="hlt">Al</span>O2-<span class="hlt">Al</span>2O3 Nanoparticles</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p class="result-summary">Colloidal Cu@Cu<span class="hlt">Al</span>O2-<span class="hlt">Al</span>2O3 bimetallic nanoparticles were prepared by a gamma irradiation method in an aqueous system in the presence of polyvinyl pyrrolidone (PVP) and isopropanol respectively as a colloidal stabilizer and scavenger of hydrogen and hydroxyl radicals. The gamma irradiation was carried out in a 60Co gamma source chamber with different doses up to 120 kGy. The formation of Cu@Cu<span class="hlt">Al</span>O2-<span class="hlt">Al</span>2O3 nanoparticles was observed initially by the change in color of the colloidal samples from colorless to brown. Fourier transform infrared spectroscopy (FTIR) confirmed the presence of bonds between polymer chains and the metal surface at all radiation doses. Results of transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDX), and X-ray diffraction (XRD) showed that Cu@Cu<span class="hlt">Al</span>O2-<span class="hlt">Al</span>2O3 nanoparticles are in a core-shell structure. By controlling the absorbed dose and precursor concentration, nanoclusters with different particle sizes were obtained. The average particle diameter increased with increased precursor concentration and decreased with increased dose. This is due to the competition between nucleation, growth, and aggregation processes in the formation of nanoclusters during irradiation.</p> <div class="credits"> <p class="dwt_author">Abedini, Alam; Saion, Elias; Larki, Farhad; Zakaria, Azmi; Noroozi, Monir; Soltani, Nayereh</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">454</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2011APS..SHK.Q2004Z"> <span id="translatedtitle">Air Blast Characteristics for Laminate <span class="hlt">Al</span> and <span class="hlt">Al</span>-Ni Composites</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Air blast characteristics of laminate <span class="hlt">Al</span> and <span class="hlt">Al</span>-Ni composites were investigated in a 23 m^3 closed chamber. 50 to 100 ?m thick <span class="hlt">Al</span>-Ni or <span class="hlt">Al</span> foils were rolled to form a cylindrical shell, which was then compacted to a density larger than 99% TMD through an explosive formation technique. Charges were prepared using 2 kg C4 explosive packed in the laminate metal shell to a metal-explosive mass ratio of 1.75. Pressure and temperature were measured through transducers on the chamber wall and pyrometry sensors facing the charge center. The pressure history showed a double-shock front structure with an accelerating precursor shock of high amplitude followed by the primary blast, suggesting considerable early-time reaction of small laminate fragments. Significant enhanced explosion pressure (QSP) was observed as compared with baseline charges in solid shell. Recovered residue showed fragments in flakes with a considerable fraction in the molten. The pressure and temperature results are further analyzed to distinguish the reaction properties between the <span class="hlt">Al</span>-Ni (gasless reaction for them alone) and <span class="hlt">Al</span> laminates as well as their effect on air blast. The results are also compared with previous investigations using various shell materials and compositing techniques.</p> <div class="credits"> <p class="dwt_author">Zhang, Fan</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">455</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2000JSSCh.155...71H"> <span id="translatedtitle">Experimental Investigation in the Quaternary Systems Ti Ni <span class="hlt">Al</span> N and Ti Ni <span class="hlt">Al</span> O</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The experimental evaluation of phase equilibria in the Ti-Ni-<span class="hlt">Al</span>-N and Ti-Ni-<span class="hlt">Al</span>-O phase diagrams are based on alloy samples, which were prepared of elemental powder blends by argon-levitation melting in a Hukin crucible. The experimental investigation employed X-ray powder diffraction, metallography, SEM, and EMPA techniques in the as-cast state as well as after annealing at 900°C. Two quaternary compounds Ti 3Ni<span class="hlt">Al</span> 2N and Ti 3Ni<span class="hlt">Al</span> 2O deriving from the filled Ti 2Ni type ( ? phase) were observed. The novel phases are in equilibrium with the Ti 2Ni-type solid solution phase (Ti 1- x<span class="hlt">Al</span> x) 2Ni, which exhibits a maximum solubility of 14 at.% <span class="hlt">Al</span> in binary Ti 2Ni. Atom order in all these phases was monitored by quantitative X-ray powder diffraction (Rietveld analyses). The difference of X-ray spectra among the various phases deriving from parent Ti 2Ni type was analyzed and the complex atom site occupation mode was discussed in terms of the general classification scheme for ? phases.</p> <div class="credits"> <p class="dwt_author">Huneau, B.; Ding, J. J.; Rogl, P.; Bauer, J.; Ding, X. Y.; Bohn, M.</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-11-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">456</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2009JTST...18..536G"> <span id="translatedtitle">Fe<span class="hlt">Al</span> and Nb<span class="hlt">Al</span>3 Intermetallic-HVOF Coatings: Structure and Properties</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Transition metal aluminides in their coating form are currently being explored in terms of resistance to oxidation and mechanical behavior. This interest in transition metal aluminides is mainly due to the fact that their high <span class="hlt">Al</span> content makes them attractive for high-temperature applications. This is also a reason to study their resistance to wear; they may be suitable for use in applications that produce a lot of wear in aggressive environments, thus replacing established coating materials. In this study, the microstructure, microhardness, and wear and oxidation performance of Fe<span class="hlt">Al</span> and Nb<span class="hlt">Al</span>3 coatings produced by high-velocity oxy-fuel spraying are evaluated with two main aims: (i) to compare these two coating systems—a commonly studied aluminide (Fe<span class="hlt">Al</span>) and, Nb<span class="hlt">Al</span>3, an aluminide whose deposition by thermal spraying has not been attempted to date—and (ii) to analyze the relationship between their microstructure, composition and properties, and so clarify their wear and oxidation mechanisms. In the present study, the higher hardness of niobium aluminide coatings did not correlate with a higher wear resistance and, finally, although pesting phenomena (disintegration in oxidizing environments) were already known of in bulk niobium aluminides, here their behavior in the coating form is examined. It was shown that such accelerated oxidation was inevitable with respect to the better resistance of Fe<span class="hlt">Al</span>, but further improvements are foreseen by addition of alloying elements in that alloy.</p> <div class="credits"> <p class="dwt_author">Guilemany, J. M.; Cinca, N.; Dosta, S.; Cano, I. G.</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">457</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2006MMTA...37.3283D"> <span id="translatedtitle">Interactions between iron, manganese, and the <span class="hlt">Al</span>-Si eutectic in hypoeutectic <span class="hlt">Al</span>-Si alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Sand-cast plates were used to determine the effect of iron and manganese concentrations on porosity levels in <span class="hlt">Al</span>-9 pct Si-0.5 pct Mg alloys. Iron increased porosity levels. Manganese additions increased porosity levels in alloys with 0.1 pct Fe, but reduced porosity in alloys with 0.6 and 1 pct Fe. Thermal analysis and quenching were undertaken to determine the effect of iron and managanese on the solidification of the <span class="hlt">Al</span>-Si eutectic. At high iron levels, the presence of large ?-<span class="hlt">Al</span>5FeSi was found to reduce the number of eutectic nucleation events and increase the eutectic grain size. The preferential formation of ?-<span class="hlt">Al</span>15Mn3Si2 upon addition of manganese reversed these effects. It is proposed that this interaction is due to ?-<span class="hlt">Al</span>5FeSi and the <span class="hlt">Al</span>-Si eutectic having common nuclei. Porosity levels are proposed to be controlled by the eutectic grain size and the size of the iron-bearing intermetallic particles rather than the specific intermetallic phase that forms.</p> <div class="credits"> <p class="dwt_author">Dinnis, C. M.; Taylor, J. A.; Dahle, A. K.</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-11-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">458</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2008MMTA...39.2435C"> <span id="translatedtitle">Effect of Strontium and Phosphorus on Eutectic <span class="hlt">Al</span>-Si Nucleation and Formation of ?-<span class="hlt">Al</span>5FeSi in Hypoeutectic <span class="hlt">Al</span>-Si Foundry Alloys</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The present investigation was carried out on hypoeutectic <span class="hlt">Al</span>-Si alloys containing two levels of Fe, 0.5 and 1.1 wt pct, and Sr in the range of 30 to 500 ppm. The addition of Sr in excess of 100 ppm significantly reduced the number of eutectic grains and also resulted in the formation of polygonal-shaped <span class="hlt">Al</span>2Si2Sr intermetallics. Transmission electron microscopy studies revealed that the <span class="hlt">Al</span>2Si2Sr phase surrounded the P-rich particles. This may suggest that the otherwise potent nuclei for the <span class="hlt">Al</span>-Si eutectic, aluminum phosphide (<span class="hlt">Al</span>P), become poisoned or deactivated by the formation of the <span class="hlt">Al</span>2Si2Sr phase around the particles. At the high-Fe level (1.1 wt pct Fe), pre-eutectic formation of ?-<span class="hlt">Al</span>5FeSi platelets further reduced the number of eutectic <span class="hlt">Al</span>-Si nucleation events. It is proposed that both eutectic silicon and ?-<span class="hlt">Al</span>5FeSi are preferentially nucleated on <span class="hlt">Al</span>P particles. Nucleation of eutectic silicon, therefore, becomes more difficult when it is preceded by the formation of <span class="hlt">Al</span>2Si2Sr or ?-<span class="hlt">Al</span>5FeSi, because fewer nuclei are available to nucleate silicon. Addition of up to 60 ppm P to the alloys increased the formation temperature of the ?-<span class="hlt">Al</span>5FeSi platelets but did not significantly alter the size, whereas the addition of Sr decreased the ?-<span class="hlt">Al</span>5FeSi nucleation temperature by reducing the potency of the <span class="hlt">Al</span>P particles.</p> <div class="credits"> <p class="dwt_author">Cho, Y. H.; Lee, H.-C.; Oh, K. H.; Dahle, A. K.</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">459</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2000noao.prop..362S"> <span id="translatedtitle">Understanding The Secondary in <span class="hlt">AL</span> Com</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">We will use the MMT Spectrograph at moderate resolution to explore the secondary in the faint (20th mag), ultrashort period (81 min) cataclysmic variable <span class="hlt">AL</span> Com. WHT optical spectra obtained during our HST UV spectral program in 1996 indicated broad band features consistent with MgH and CaH. The corresponding lack of TiO implies a metal defficiency in the secondary. Confirmation and further exploration of these features will provide important insight into abundance peculiarities related to the evolution of close binaries, as <span class="hlt">AL</span> Com sits at the critical juncture of the orbital period minimum in evolution. Theoretical models predict systems that start at high mass should ultimately evolve to the period minimum, after which the secondary becomes a degenerate low mass (brown dwarf-like) star. The low mass transfer rate in <span class="hlt">AL</span> Com allows us a rare glimpse into the stellar properties that are affected by mass transfer scenarios in comparison to normal field M dwarfs and brown dwarfs.</p> <div class="credits"> <p class="dwt_author">Szkody, Paula; Hawley, Suzanne; Harrison, Thomas; Howell, Steve; Laws, Chris</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">460</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/servlets/purl/6545210"> <span id="translatedtitle">An <span class="hlt">ALS</span> (Advanced Light Source) handbook</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">This booklet aims to provide the prospective user of the Advanced Light Source with a concise description of the radiation a researcher might expect at his or her experimental station. The focus is therefore on the characteristics of the light that emerges from insertion devices and bending magnets and on how components of the beam lines further alter the properties of the radiation. The specifications and operating parameters of the <span class="hlt">ALS</span> injection system and storage ring are of only peripheral interest. To this end, Sections 3 and 5 and most of Section 4 are devoted to summary presentations, by means of performance plots and tabular compilations, of radiation characteristics at the <span class="hlt">ALS</span>--spectral brightness, flux, coherent power, resolution, time structure, etc.--assuming a representative set of four undulators and one wiggler and a corresponding set of five beam lines. As a complement to these performance summaries, Section 1 is a general introductory discussion of synchrotron radiation and the <span class="hlt">ALS</span>, and Section 2 provides a compendious introduction to the characteristics of synchrotron radiation from bending magnets, wigglers, and undulators. In addition, Section 4 briefly introduces the theory of diffraction grating and crystal monochromators. 15 refs., 28 figs., 5 tabs.</p> <div class="credits"> <p class="dwt_author">Not Available</p> <p class="dwt_publisher"></p> <p class="publishDate">1988-11-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:100%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_22");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return 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showDiv("page_25");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://www.science.gov/scigov/images/icon.last.18x20.png" alt="Last Page" /></a> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">461</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.osti.gov/scitech/biblio/20777188"> <span id="translatedtitle">Energetic ion bombarded Fe/<span class="hlt">Al</span> multilayers</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p class="result-summary">The utility of ion-assisted deposition is investigated to explore the possibility of counteracting the deficiency of back-reflected current of Ar neutrals in the case of lighter elements such as <span class="hlt">Al</span>. A range of energetically ion bombarded Fe/<span class="hlt">Al</span> multilayers sputtered with applied surface bias of 0, -200, or -400 V were deposited onto Si(111) substrates in an argon atmosphere of 4 mTorr using a computer controlled dc magnetron sputtering system. Grazing incidence reflectivity and rocking curve scans by synchrotron x rays of wavelength of 1.38 A were used to investigate the structures of the interfaces produced. Substantial evidence has been gathered to suggest the gradual suppression of interfacial mixing and reduction in interfacial roughness with increases of applied bias. The densification of the <span class="hlt">Al</span> microstructure was noticeable and may be a consequence of resputtering attributable to the induced ion bombardment. The average interfacial roughnesses were calculated for the 0, -200, and -400 V samples to be 7{+-}0.5, 6{+-}0.5, and 5{+-}0.5 A respectfully demonstrating a 30% improvement in interface quality. Data from rocking curve scans point to improved long-range correlated roughness in energetically deposited samples. The computational code based on the recursive algorithm developed by Parratt [Phys. Rev. 95, 359 (1954)] was successful in the simulation of the specular reflectivity curves.</p> <div class="credits"> <p class="dwt_author">Al-Busaidy, M.S.; Crapper, M.D. [College Science, Physics Department, Sultan Qaboos University, P.O. Box 36, Al-Khod 123 (Oman); Department of Physics, Loughborough University, Loughborough (United Kingdom)</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-05-15</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">462</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3666397"> <span id="translatedtitle">?-Synuclein Modification in an <span class="hlt">ALS</span> Animal Model</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p class="result-summary">Amyotrophic lateral sclerosis (<span class="hlt">ALS</span>) is a progressively paralytic neurodegenerative disease that can be caused by mutations in Cu/Zn-superoxide dismutase 1 (SOD1). Transgenic mice that overexpress mutant SOD1 develop paralysis and accumulate aggregates of mutant protein in the brainstem and spinal cord. Bee venom (BV), which is also known as apitoxin, is extracted from honeybees and is commonly used in oriental medicine for the treatment of chronic rheumatoid arthritis and osteoarthritis. The purpose of the present study was to determine whether BV affects misfolded protein aggregates such as alpha-synuclein, which is a known pathological marker in Parkinson disease, and ubiquitin-proteasomal activity in hSOD1G93A mutant mice. BV was bilaterally administered into a 98-day-old hSOD1G93A animal model. We found that BV-treated hSOD1G93A transgenic mice showed reduced detergent-insoluble polymerization and phosphorylation of ?-synuclein. Furthermore, phosphorylated or nitrated ?-synuclein was significantly reduced in the spinal cords and brainstems of BV-treated hSOD1G93A mice and reduced proteasomal activity was revealed in the brainstems of BV-treated symptomatic hSOD1G93A. From these findings, we suggest that BV treatment attenuates the dysfunction of the ubiquitin-proteasomal system in a symptomatic hSOD1G93A <span class="hlt">ALS</span> model and may help to slow motor neuron loss caused by misfolded protein aggregates in <span class="hlt">ALS</span> models.</p> <div class="credits"> <p class="dwt_author">Yang, Eun Jin; Choi, Sun-Mi</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">463</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2008AIPC..999..257V"> <span id="translatedtitle">Devitrification of <span class="hlt">Al</span>-Y-Ni Glasses</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Crystallization of gas-atomized <span class="hlt">Al</span>-4.3Y-3.8Ni alloy powder during consolidation has been studied ex-situ in a transmission electron microscope using high-resolution lattice imaging together with the image simulations, selected-area diffraction and energy-dispersive X-ray spectrometry experiments. The as-atomized powder is predominantly amorphous but some particles others show evidence of decomposition. On the application of heat and pressure two types of decomposition product are formed initially; equiaxed nanoscale ?-<span class="hlt">Al</span> grains embedded in an amorphous matrix, and dendritic aluminum grains containing complex ordered structures. The ordered structures in the ?-<span class="hlt">Al</span> were identified as Guinier-Preston like zones: thin sheets of solute rich material parallel to {100} and {110} aluminum planes with ordered cubic symmetry. Amorphous and micro-crystalline phases are in between the aluminum-rich regions. The second and third stages of crystallization involve the conversion of these ordered phases and embryonic precipitates to the better-known binary and ternary compounds.</p> <div class="credits"> <p class="dwt_author">Vasiliev, A. L.; Aindow, M.</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-04-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">464</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://academic.research.microsoft.com/Publication/49462888"> <span id="translatedtitle">Changes in fungal population of fly ash and vinasse mixture during <span class="hlt">vermicomposting</span> by Eudrilus eugeniae and Eisenia fetida: Documentation of cellulase isozymes in <span class="hlt">vermicompost</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://academic.research.microsoft.com/">Microsoft Academic Search </a></p> <p class="result-summary">Fly ash (FA) and vinasse (VN), two industrial wastes, are generated in huge amounts and cause serious hazards to the environment. In this experiment, different proportions of these two wastes were used as food for two epigeic earthworms (Eisenia fetida and Eudrilus eugeniae) to standardize the recycling technique of these two wastes and to study their effect on fungal especially</p> <div class="credits"> <p class="dwt_author">Prabhat Pramanik; Young Ryun Chung</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">465</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=20070021778&hterms=Si+Al+Ca&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D30%26Ntt%3DSi%252C%2BAl%252C%2BO%252C%2BCa"> <span id="translatedtitle">Solidification Behavior of gamma'-Ni3<span class="hlt">Al</span> Containing Alloys in the Ni-<span class="hlt">Al</span>-O System</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The chemical activities of <span class="hlt">Al</span> and Ni in gamma(prime)-Ni3<span class="hlt">Al</span>-containing systems were measured using the multi-cell Knudsen effusion-cell mass spectrometry technique (multi-cell KEMS), over the composition range 8 - 32 at.%<span class="hlt">Al</span> and temperature range T = 1400 - 1750 K. From these measurements a better understanding of the equilibrium solidification behaviour of gamma(prime)-Ni3<span class="hlt">Al</span>-containing alloys in the Ni-<span class="hlt">Al</span>-O system was established. Specifically, these measurements revealed that (1) gamma(prime)-Ni3<span class="hlt">Al</span> forms via the peritectiod reaction, gamma + Beta (+ A12O3) = gamma (prime) (+ <span class="hlt">Al</span>2O3), at 1633 +/- 1 K, (2) the {gamma + Beta + <span class="hlt">Al</span>2O3} phase field is stable over the temperature range 1633 through 1640 K, and (3) equilibrium solidification occurs by the eutectic reaction, L (+ <span class="hlt">Al</span>2O3) = gamma + Beta (+ <span class="hlt">Al</span>2O3), at 1640 +/- 1 K and a liquid composition of 24.8 +/- 0.2 at.%<span class="hlt">Al</span> (at an unknown oxygen content). When projected onto the Ni-<span class="hlt">Al</span> binary, this behaviour is inconsistent with the current Ni-<span class="hlt">Al</span> phase diagram and a new diagram is proposed. This new Ni-<span class="hlt">Al</span> phase diagram explains a number of unusual steady-state solidification structures reported previously and provides a much simpler reaction scheme in the vicinity of the gamma(prime)-Ni3<span class="hlt">Al</span> phase field.</p> <div class="credits"> <p class="dwt_author">Copland, Evan</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">466</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2010JMEP...19.1357A"> <span id="translatedtitle">Potentiodynamic Polarization Aspects of the As-cast and Sprayed <span class="hlt">Al</span>-Si, <span class="hlt">Al</span>-Sn and <span class="hlt">Al</span>-Sn-Si Alloys in a Sodium Chloride Solution</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">The present study compares the corrosion behavior of <span class="hlt">Al</span>-Sn, <span class="hlt">Al</span>-Si and <span class="hlt">Al</span>-Sn-Si alloys processed by spray forming with that of the conventional chill cast ones in aqueous 0.1 N NaCl solution. Spray forming resulted in finer microstructural features with uniform distribution of second-phase particles. The spray formed <span class="hlt">Al</span>-Si samples showed improved corrosion resistance as compared to the chill cast ones. The Sn containing alloys showed inferior corrosion resistance in the neutral electrolyte. The addition of 12.5 wt.% Si to <span class="hlt">Al</span>-Sn alloys improves the corrosion resistance.</p> <div class="credits"> <p class="dwt_author">Anil, M.; Balaji, S.; Upadhyaya, A.; Ghosh, M. K.; Ojha, S. N.</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">467</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=20010060374&hterms=nemoto&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D20%26Ntt%3Dnemoto"> <span id="translatedtitle">Creep and Toughness of Cryomilled Ni<span class="hlt">Al</span> Containing Cr</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">Ni<span class="hlt">Al-Al</span>N + Cr composites were produced by blending cryomilled Ni<span class="hlt">Al</span> powder with approx. 10 vol % Cr flakes. In comparison to the as-consolidated matrices, hot isostatically pressed Cr-modified materials did not demonstrate any significant improvement in toughness. Hot extruded Ni<span class="hlt">Al-Al</span>N+10.5Cr, however, possessed a toughness twice that determine for the base Ni<span class="hlt">Al-Al</span>N alloy. Measurement of the 1200 to 1400 K plastic flow properties revealed that the strength of the composites was completely controlled by the properties of the Ni<span class="hlt">Al-Al</span>N matrices. This behavior could be successfully modeled by the Rule-of-Mixtures, where load is shed from the weak Cr to the strong matrix.</p> <div class="credits"> <p class="dwt_author">Whittenberger, J. Daniel; Aikin, Beverly; Salem, Jon</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">468</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://ntrs.nasa.gov/search.jsp?R=19890005862&hterms=burtin&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dburtin"> <span id="translatedtitle">The oxidation of Ni-rich Ni-<span class="hlt">Al</span> intermetallics</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p class="result-summary">The oxidation of Ni-<span class="hlt">Al</span> intermetallic alloys in the beta-Ni<span class="hlt">Al</span> phase field and in the two phase beta-Ni<span class="hlt">Al</span>/gamma'-Ni3<span class="hlt">Al</span> phase field has been studied between 1000 and 1400 C. The stoichiometric beta-Ni<span class="hlt">Al</span> alloy doped with Zr was superior to other alloy compositions under cyclic and isothermal oxidation. The isothermal growth rates did not increase monotonically as the alloy <span class="hlt">Al</span> content was decreased. The characteristically ridged alpha-<span class="hlt">Al</span>2O3 scale morphology, consisting of cells of thin, textured oxide with thick growth ridges at cell boundaries, forms on oxidized beta-Ni<span class="hlt">Al</span> alloys. The correlation of scale features with isothermal growth rates indicates a predominant grain boundary diffusion growth mechanism. The 1200 C cyclic oxidation resistance decreases near the lower end of the beta-Ni<span class="hlt">Al</span> phase field.</p> <div class="credits"> <p class="dwt_author">Doychak, Joseph; Smialek, James L.; Barrett, Charles A.</p> <p class="dwt_publisher"></p> <p class="publishDate">1988-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">469</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2004ApSS..231...86V"> <span id="translatedtitle">Secondary ion emission from polycrystalline <span class="hlt">Al</span> under Cs + irradiation</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Work function and secondary ion intensity variations apparent during the initial stages of sputtering with 1 keV Cs + ions have been recorded from <span class="hlt">Al</span> under Cs + irradiation. These are compared with each other and ion-induced L 23MM Auger emissions induced through Ar + and Xe + irradiation. As expected, the <span class="hlt">Al</span> + and <span class="hlt">Al</span> - intensities scale with the substrate work function in a manner consistent with the electron tunneling model. Likewise, the <span class="hlt">Al</span> 2+ population scales with the Auger signal consistent with a surface excitation initiated process. Furthermore, only single 2p vacancies were noted indicating that <span class="hlt">Al</span> 2+ forms from the sputtered <span class="hlt">Al</span> + population and <span class="hlt">Al</span> + forms from the sputtered <span class="hlt">Al</span> 0 population. The work function dependence exhibited by <span class="hlt">Al</span> + reveals that this is a minor process, at least for these ions under these conditions.</p> <div class="credits"> <p class="dwt_author">van der Heide, P. A. W.</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">470</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2014SuMi...72..370B"> <span id="translatedtitle">Computational study of OCN- chemisorption over <span class="hlt">Al</span>N nanostructures</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p class="result-summary">Density functional theory (DFT) calculations were applied to consider the adsorption of cyanato anion (OCN-) on the external surfaces of <span class="hlt">Al</span>N nanotubes and <span class="hlt">Al</span>N nano-cages. The interaction energies of OCN- (N-side) interacted with (6, 0) and (4, 4) <span class="hlt">Al</span>N nanotubes are about -2.84 and -2.72 eV, respectively, implying that the pristine (6, 0) <span class="hlt">Al</span>N nanotubes is more reactive and sensitive than (4, 4) <span class="hlt">Al</span>N nanotubes for OCN- detection. The adsorption energy of the reaction between OCN- and <span class="hlt">Al</span>16N16 is too strong (-3.32 eV) than that of <span class="hlt">Al</span>12N12 (-3.24 eV). The results demonstrate that the <span class="hlt">Al</span>N nano-cages have a better condition for practical applications as a chemical adsorbent for the adsorption of OCN- compared with <span class="hlt">Al</span>N nanotubes.</p> <div class="credits"> <p class="dwt_author">Baei, Mohammad T.; Taghartapeh, Mohammad Ramezani; Lemeski, E. Tazikeh; Soltani, Alireza</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-08-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">471</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://science.gov/scigov/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/17234942"> <span id="translatedtitle">Unexpected stability of <span class="hlt">Al</span>4H6: a borane analog?</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p class="result-summary">Whereas boron has many hydrides, aluminum has been thought to exhibit relatively few. A combined anion photoelectron and density functional theory computational study of the <span class="hlt">Al</span>4H-6 anion and its corresponding neutral, <span class="hlt">Al</span>4H6, showed that <span class="hlt">Al</span>4H6 can be understood in terms of the Wade-Mingos rules for electron counting, suggesting that it may be a borane analog. The data support an <span class="hlt">Al</span>4H6 structure with a distorted tetrahedral aluminum atom framework, four terminal <span class="hlt">Al</span>-H bonds, and two sets of counter-positi