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1

Isolation and characterization of oligotrophic acido-tolerant methanogenic consortia from a Sphagnum peat bog  

Microsoft Academic Search

Two dense and highly enriched (up to 109 cells ml?1, <10% of bacterial satellites) acido-tolerant (pH 4.0–6.5) methanogenic consortia, ‘26’ and ‘K’, were isolated from the peat beneath a Sphagnum–Eriophorum–Carex community in West Siberia. Both consortia produced methane from CO2:H2 on chemically defined, diluted N-free media containing Ti(III)citrate as reducing agent. The phylogenetic analysis of 16S ribosomal DNA revealed three

Maria V Sizova; Nicolai S Panikov; Tatiana P Tourova; Patrick W Flanagan

2003-01-01

2

Myoinositol dehydrogenase from the acido- and thermophilic red alga Galdieria sulphuraria  

Microsoft Academic Search

A NAD-dependent myo-inositol dehydrogenase (EC 1.1.1.18) has been purified from the acido- and thermophilic red alga Galdieria sulphuraria. This enzyme catalyses the reversible oxidation of myo-inositol to scyllo-inosose (2-keto-inositol). The activity with scyllo-inosose and NADH was ca 75-times higher than with myo-inositol and NAD. At pH 8.0 the equilibrium of the reaction strongly favours the production of myo-inositol. The Km

Robert Stein; Claus Schnarrenberger; Wolfgang Gross

1997-01-01

3

Diphasic acido-basic properties of D(octylphenyl)phosphoric acid (DOPPA)  

SciTech Connect

In the first part of this work, the diphasic acido-basic constant (pka*) of di(octylphenyl)phosphoric acid, denoted hereafter DOPPA or HL, is determined from its experimental diphasic neutralization curve. The pka* value of DOPPA appears to be equal to 2.6 in the presence of 1 mol/dm{sup 3} sodium salt. Such a value is significantly lower than that previously determined for di(2-ethylhexyl) phosphoric acid (DEHPA, pka* = 5.2), 2-ethylhexylphosphonic acid, mono-2-ethylhexyl ester (PC88A, pka* = 7.1) and di(2,4,4-trimethylpentyl)phosphinic acid (CYANEX 272, pka* = 8.7). DOPPA (HL) is definitely more acidic than the other organophosphorus acids because its acidic proton can be easily exchanged with sodium cation to form Na{sup +}HL{sub 2}{sup -} species in organic phase. In the second and final part of the work, molecular modelling is used to model the dimers of various organophosphorus acids. A structure-activity relationship is obtained between the association energies of modelled dimers and their diphasic acido-basic constants. This relationship is then used for predicting the pka* values of DOPPOA and DOPPIA which are the phosphonic and phosphinic analogs of DOPPA, respectively. 16 refs., 5 figs., 4 tabs.

Sella, C.; Cote, G.; Bauer, D. [Laboratoire de Chimie Analytique, Paris (France); Becis, A. [Centre de Developpement des Materiaux, Draria (Algeria)

1995-07-01

4

Some Biochemical Properties of an Acido-Thermophilic Archae-Bacterium Sulfolobus Acidocaldarius  

NASA Astrophysics Data System (ADS)

To elucidate the phylogenic status of archaebacteria, some basic cellular components of an acido-thermophilic archaebacterium,Sulfolobus acidocaldarius, were studied. Poly(A) containing RNA was present in the cells, and performed the role of mRNA in a cell-free extract of reticulocyte or the archaebacteria. Poly(A) containing RNA was also found in other archaebacterial cells. The absence of cap structure was suggested in these RNAs. The cell-free protein synthesis using the archaebacterial extract was inhibited by anisomycin, a specific inhibitor for eukaryotic ribosomes. Two unique membrane-bound ATPases were detected. Based on resistance to H+-ATPase inhibitors, these enzymes seemed not to be F0F1-ATPase.

Oshima, Tairo; Ohba, Masayuki; Wagaki, Takayoshi

1984-12-01

5

Mechanisms of Acido-Tolerance and Characteristics of Photosystems in an Acidophilic and Thermophilic Red Alga, Cyanidium Caldarium  

Microsoft Academic Search

\\u000a In this chapter, we describe the mechanisms of acido-tolerance in an acidophilic- and thermophilic red alga, Cyanidium caldarium. In spite of the extremely acidic environments it inhabits, the intracellular pH of Cyanidium cells is kept neutral by pumping out the protons previously leaked into the cells according to the steep pH gradient. The\\u000a H+ pump is driven by the plasma

Isao Enami; Hideyuki Adachi; Jian-Ren Shen

6

Evaluation of Surface Acido?Basic Properties of Inorganic?Based Solids by Model Catalytic Alcohol Reaction Networks  

Microsoft Academic Search

The characterization of acido?basic properties of the surface of inorganic solids is essential to understand the behavior of catalysts during heterogeneous catalyzed reactions. The use of alcohols as reactive probe molecules to investigate these properties has been developed since the 1970s, and in 1991, a new alcohol, 2?methylbut?3?yn?2?ol (MBOH), was proposed. This review sums up the knowledge accumulated for 15

2006-01-01

7

TUBERCULOSIS COMO ENFERMEDAD OCUPACIONAL  

PubMed Central

Existe evidencia suficiente para declarar a la tuberculosis como enfermedad ocupacional en diversos profesionales especialmente entre los trabajadores de salud. En el Perú están normados y reglamentados los derechos laborales inherentes a la tuberculosis como enfermedad ocupacional, como la cobertura por discapacidad temporal o permanente. Sin embargo, estos derechos aún no han sido suficientemente socializados. En este trabajo se presenta información sobre el riesgo de adquirir tuberculosis en el lugar de trabajo, se revisan las evidencias para declarar a la tuberculosis como enfermedad ocupacional en trabajadores de salud y se presenta la legislación peruana vigente al respecto.

Mendoza-Ticona, Alberto

2014-01-01

8

La posesión como hecho punible  

Microsoft Academic Search

Este trabajo estudia el delito de posesión, el cual se extiende semánticamente hasta términos como custodia, mantener disponible, almacenar, etc., y como conminada con la pena se halla la posesión de explosivos, de armas de fuego, de drogas, de pornografía infantil, etc. En este mismo trabajo se analizan, bajo la óptica del Código Penal alemán, cómo las acciones graves o

Friedrich Christian Schroeder

9

QUEJA COMO MECANISMO DE GARANTÍA  

Microsoft Academic Search

En la actualidad debemos considerar imprescindible, como premisa fundamental, la defensa de la persona ante las posibles arbitrariedades de los órganos de poder, así como otras que a menudo vulneran derechos que atañen al ciudadano. Quizás algunos crean que se trata de una quimera inalcanzable, otros, por el contrario, confían que puede ser posible. Sin embargo, considero que mientras los

Liechert García Rojas

2011-01-01

10

Somatostatin receptor-mediated tumor-targeting drug delivery using octreotide-PEG-deoxycholic acid conjugate-modified N-deoxycholic acid-O, N-hydroxyethylation chitosan micelles.  

PubMed

In this study, a ligand-PEG-lipid conjugate, octreotide-polyethene glycol-deoxycholic acid (OCT(Phe)-PEG-DOCA, or OPD) was successfully synthesized and used as a targeting molecule for N-deoxycholic acid-O, N-hydroxyethylation chitosan (DAHC) micelles for efficient cancer therapy. DAHC micelles exhibited good loading capacities for doxorubicin (DOX), a model anti-cancer drug, and the modification of OPD showed no significant effect on drug load while slightly increasing the particle size and partly shielding the positive charges on the surface of micelles. Accelerated release rate of DOX from micelles were also observed after OPD modification and the release profile exhibited pH-sensitive properties. Compared with DAHC-DOX micelles, OPD-DAHC-DOX micelles exhibited significantly stronger cytotoxicity to MCF-7 cells (SSTRs overexpression) but with hardly any difference from WI-38 cells (no SSTRs expression). The results of flow cytometry and confocal laser scanning microscopy further revealed that OPD-DAHC-DOX micelles could be selectively taken into tumor cells by SSTRs-mediated endocytosis. In vivo investigation of micelles on nude mice bearing MCF-7 cancer xenografts confirmed that OPD-DAHC micelles possessed much higher tumor-targeting capacity than the DAHC control and exhibited enhanced anti-tumor efficacy and decreased systemic toxicity. These results suggest that OPD-DAHC micelles might be a promising anti-cancer drug delivery carrier for targeted cancer therapy. PMID:22704599

Huo, Meirong; Zou, Aifeng; Yao, Chengli; Zhang, Yong; Zhou, Jianping; Wang, Jing; Zhu, Qinnv; Li, Jing; Zhang, Qiang

2012-09-01

11

Como Lo Hago Yo: Myelomeningocele  

PubMed Central

Fortificación con ádico fólico es efectiva, pero aún falta conciencia en los jóvenes. La legalidad del aborto aumenta la importancia de la consulta prenatal. Realizo la cirugía bajo microcoscopio por razones didácticas. Irrigación continua para reducir la temperatura del tejido. Trato a la plaqueta como tejido viable. No suturo la plaqueta. No cierro músculo. ATB por una semana después de cirugía. Hidrocefalia: Válvula en todos los casos de ventriculomegalia. Médula anclada: Desanclar una sola vez. Chiari II: Revisar la válvula. Incluir en el seguimiento rendimiento escolar, puede indicar obstrucción de la válvula o médula anclada.

Lazareff, Jorge

2014-01-01

12

LA CREATIVIDAD COMO EXPRESIÓN DE LA PERSONALIDAD  

Microsoft Academic Search

El hombre es un ser potencialmente creativo, pues la creatividad se desarrolla a lo largo de toda nuestra vida, haciéndose necesario e importante que los docentes puedan potenciarla desde las primeras edades, correspondiendo a la escuela y a la educación, influir en la expresión creativa de nuestros educandos en la actividad cognoscitiva y para la vida. La creatividad como proceso

Yaina Martínez Viel; Dariela Pérez Obregón

2011-01-01

13

EXAFS Study of Co/Mo Multilayers.  

NASA Astrophysics Data System (ADS)

The reduction of the measured moment in magnetic multilayers relative to the bulk value is a poorly understood phenomenon. This lack of understanding is clearly illustrated by two studies on Co/Mo where the reduced moment is attributed to two very different mechanisms. Sato reports a ``dead layer'', i.e., Co atoms near the Mo layers have no moment or a reduced moment(Noboru Sato, J. Appl. Phys. 63), 3476 (1988), while Wang, et al. report the presence of a non-magnetic compound--Co_7Mo_6.(Y. Wang, et al., J. Mag. Mag. Mater 102), 121 (1991). These studies report different saturation magnetizations for thicker Co layers; however, they agree that crystalline order vanishes as both layer thicknesses decrease and that magnetism decreases greatly for thinner Co layers. We have done structural and magnetic studies(C.L. Foiles, et al., MRS Symposium Proc. 384) (in press) on dc magnetron sputtered Co/Mo multilayers and find that the most striking feature is how the saturation magnetization scales with the apparent coordination number using EXAFS data with a Co standard. Data from the various studies will be compared.

Franklin, M. R.; Foiles, C. L.; Loloee, R.

1996-03-01

14

Management of Lake Como: a multiobjective analysis  

SciTech Connect

This paper describes a heuristic approach for improving the performance of multipurpose reservoirs that have already been in operation for a certain number of years. The main characteristic of the method is that the analyst must first learn from the past experience of the manager and synthesize it into a simple operating rule. Then, the analyst must point out, with the help of the manager, what the acceptable modifications of such a rule are. After this has been accomplished, the optimal improvements of the operating rule can be obtained by using standard optimization techniques. Quite satisfactory results have been obtained by applying this approach to Lake Como (Northern Italy), which has been regulated since the end of World War II. In fact, the method shows that both flood protection on the lake shores and water supply to the downstream agricultural areas can be substantially improved, without lowering the mean yearly electricity production of the downstream run-of-river plants. For this reason the operating rule proposed by the method has been programmed on a microcomputer, which is now used every day by the manager as an essential support for his final decision. This and the fact that other actions suggested by this analysis have indeed been undertaken by the local authorities gave to this study the chance to have a positive and direct impact on the lake management.

Guariso, G.; Rinaldi, S.; Soncini-Sessa, R.

1986-02-01

15

Como Lo Hago Yo: Mielomeningocele En Bolivia  

PubMed Central

Introducción: Las malformaciones del tubo neural (MTN) representan la segunda causa más frecuente de anomalías congénitas, luego de las cardiopatías. En este grupo se destaca el mielomeningocele (MMC) por su mayor incidencia, y por ser la más incapacitante y la más compleja entre todas las demás malformaciones del sistema nervioso c`entral (SNC). En Bolivia, como en muchos países de Sudamérica, los bajos niveles socio-culturales y la debilidad en el sistema sanitario, hacen que su incidencia y su morbilidad, sean mayores que en las naciones más desarrolladas. Material y Métodos: Se realizó un estudio retrospectivo y descriptivo de 70 casos de MMC, atendidos por un equipo multidisciplinario en el Hospital Universitario Japonés (HUJ) de Santa Cruz de la Sierra, entre 2008-2011. De ellos, 60 fueron intervenidos quirúrgicamente. Resultados: Se realizaron controles prenatales sólo en 27 mujeres (38.6%), diagnosticándose una disrafia espinal en apenas dos casos (7.4%). La edad de ingreso del MMC en su mayoría fue después de las 24 horas (65.6%), predominando su localización en la región lumbosacra (64.3%). De ellos, 67.2% eran abiertos, presentando un 32.9% un daño neurológico motor parcial mientras que 47.1% tenían paraplejia por debajo de la lesión. De los 70 casos, tres (4.3%) no fueron intervenidos, por presentar defectos congénitos severos o estado general grave. Las principales complicaciones posoperatorias inmediatas fueron: dehiscencia de sutura y/o infección de la herida (16.6%), fístula de líquido cefalorraquídeo (LCR) (10%) e infección del SNC (11.7%). La mortalidad general y postoperatoria fue de 7.1% y 3.3%, respectivamente. Al mes de vida presentaban hidrocefalia un 80% de los pacientes operados, colocándose una derivación ventriculoperitoneal (DVP) de presión media. De 9 pacientes que tuvieron un acompanamiento de dos o más años, seis presentaron una médula anclada, que fueron intervenidas quirúrgicamente. Conclusión: En esta serie, el diagnóstico prenatal del MMC fue ocasional y la derivación al HUJ de los recién nacidos con esta malformación fue generalmente tardía. No hubo predominio de género y la mayoría de los casos presentaron sus lesiones en la región lumbar y lumbosacra. La mortalidad general y postoperatoria fue similar a la reportada en la literatura. Pocos enfermos realizaron controles posteriores al alta hospitalaria. Igual que otros países de Sudamérica, las falencias en el sistema público de salud y el nivel sociocultural, son factores determinantes para un mal pronóstico en estos niños. Por sus múltiples complicaciones, el MMC requiere de una especial atención gubernamental, sobre todo de carácter preventivo mediante el uso de ácido fólico en mujeres fértiles, como también de un equipo profesional multidisciplinario, a fin de realizar un tratamiento adecuado y oportuno. Al mismo tiempo, trabajos multicéntricos en hospitales de América Latina, ayudarán al mejor manejo de estos pacientes.

Dabdoub, Carlos F.; Dabdoub, Carlos B.; Villavicencio, Ramiro; Quevedo, German

2014-01-01

16

15. Como gatehouse (outlet tower) and access bridge, looking west ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

15. Como gatehouse (outlet tower) and access bridge, looking west from dam crest (Trash rack visible in reservoir pool behind and right of tower) - Bitter Root Irrigation Project, Como Dam, West of U.S. Highway 93, Darby, Ravalli County, MT

17

Co/Mo multilayers deposited by ion-beam sputtering  

NASA Astrophysics Data System (ADS)

Co/Mo multilayers have been prepared by using ion-beam sputtering. The samples had a periodic layered structure and an in-plane easy axis of magnetization. The structures of Co layers were disordered, fcc or fcc + hcp, depending upon the thickness of the Co layer ( tCo), as well as the thickness of the Mo layer ( tMo). A nonmagnetic compound, Co 7Mo 6, was observed to form at the Co/Mo interfaces, unlike compounds found in Co/Mo multilayers prepared by magnetron sputtering. The existence of this compound was considered to be an important reason for the decrease of the saturation magnetization of crystalline samples with tCo < 40 Å, among others. The dependence of the coercivity on tCo and/or tMo was also studied.

Wang, Y.; Cui, F. Z.; Li, W. Z.; Fan, Y. D.

1991-12-01

18

Diabetic acido-ketosis revealing thiamine-responsive megaloblastic anemia.  

PubMed

Thiamine-responsive megaloblastic anemia (TRMA) is a rare autosomal recessive disorder characterized by megaloblastic anemia, diabetes mellitus and progressive sensorineural deafness. We report the cases of two infants, aged 4 and 5 months, hospitalized for diabetic ketoacidosis requiring insulin therapy. Laboratory tests revealed megaloblasic anemia, thrombocytopenia and normal thiamine level. Neurosensorial investigations showed bilateral deafness and ophthalmic involvement. Treatment with oral thiamine normalized hematological disorders and controlled diabetes; however, thiamine therapy had no impact on neurosensorial disorders. PMID:19922902

Bouyahia, O; Ouderni, M; Ben Mansour, F; Matoussi, N; Khaldi, F

2009-12-01

19

Valorisation of Como Historical Cadastral Maps Through Modern Web Geoservices  

NASA Astrophysics Data System (ADS)

Cartographic cultural heritage preserved in worldwide archives is often stored in the original paper version only, thus restricting both the chances of utilization and the range of possible users. The Web C.A.R.T.E. system addressed this issue with regard to the precious cadastral maps preserved at the State Archive of Como. Aim of the project was to improve the visibility and accessibility of this heritage using the latest free and open source tools for processing, cataloguing and web publishing the maps. The resulting architecture should therefore assist the State Archive of Como in managing its cartographic contents. After a pre-processing consisting of digitization and georeferencing steps, maps were provided with metadata, compiled according to the current Italian standards and managed through an ad hoc version of the GeoNetwork Opensource geocatalog software. A dedicated MapFish-based webGIS client, with an optimized version also for mobile platforms, was built for maps publication and 2D navigation. A module for 3D visualization of cadastral maps was finally developed using the NASA World Wind Virtual Globe. Thanks to a temporal slidebar, time was also included in the system producing a 4D Graphical User Interface. The overall architecture was totally built with free and open source software and allows a direct and intuitive consultation of historical maps. Besides the notable advantage of keeping original paper maps intact, the system greatly simplifies the work of the State Archive of Como common users and together widens the same range of users thanks to the modernization of map consultation tools.

Brovelli, M. A.; Minghini, M.; Zamboni, G.

2012-07-01

20

Morphological investigation of nanostructured CoMo catalysts  

NASA Astrophysics Data System (ADS)

This work reports the morphological investigation of nanostructured sulfided CoMo catalysts by means of high-resolution transmission electron microscopy (HRTEM). The catalysts were supported on Ti-modified hexagonal mesoporous silica (HMS-Ti) and P-modified HMS-Ti (P/HMS-Ti) materials. The oxide precursors were characterized by specific surface area (S BET), temperature-programmed reduction (TPR), diffuse reflectance infrared Fourier transform spectroscopy in the OH region (DRIFTS-OH) and X-ray photoelectron spectroscopy (XPS) in order to elucidate the influence of the impregnation sequence (successive vs. simultaneous) and the effect of P-incorporation into HMS-Ti material on the morphology of calcined CoMo catalysts. Both TPR and XPS measurements indicate that the catalysts prepared by successive impregnation possess well-dispersed MoO 3 and CoO phases, whereas their counterparts prepared by simultaneous impregnation additionally possess the CoMoO 4 phase. For all sulfided catalysts, the presence of MoS 2 phase with particle size in the range 3.3-4.4 nm was confirmed by HRTEM. Catalytic activity was evaluated in the reaction of hydrodesulfurization (HDS) of dibenzothiophene (DBT) carried out in a flow reactor at 593 K and hydrogen pressure of 5.5 MPa. P-incorporation into the HMS-Ti material led to an overall increase in HDS activity and the hydrogenation ability of the sulfided catalysts. All catalysts proved to be stable during 10 h time-on-stream (TOS) operation. The activity of sulfide catalysts in the target reaction depends linearly on the surface exposure of Co species in the oxide precursors, as determined by XPS, and on the morphology of the sulfide form of catalysts (surface density of MoS 2 particles and their sizes) as determined by HRTEM.

Pawelec, B.; Castaño, P.; Zepeda, T. A.

2008-04-01

21

EMPLEO DE FRACCIONES CELULARES DE LA LEVADURA Saccharomyces cerevisiae COMO ADITIVO ALIMENTARIO PARA Artemia franciscana  

Microsoft Academic Search

RESUMEN En el presente estudio se evalúa la levadura Saccharomyces cerevisiae de forma desintegrada (LD) y tres fracciones celulares obtenidas de ella: complejo pared-membrana (FP), núcleo-proteínas (FN) y citoplasma (FC) como aditivo alimentario utilizando al crustáceo Artemia franciscana como modelo de experimentación. Se realizaron dos bioensayos para determinar el efecto que ejercían dichos aditivos en el crecimiento, biomasa seca, supervivencia

Yamilé Comabella; Tsai García-Galano; Olimpia Carrillo; Yadir Mauri

22

A emergência da categoria “agricultor familiar” como sujeito de direitos na trajetória do sindicalismo rural brasileiro  

Microsoft Academic Search

O processo de reconhecimento dos agricultores familiares como sujeitos de direitos apesar de ser recente quando pensado a partir da trajetória do sindicalismo rural brasileiro demonstra ter suas primeiras raízes ainda na constituição da legislação trabalhista-sindical dos anos de 1930. Visando explorar esse processo o artigo tem por objetivo analisar a emergência dos agricultores familiares como sujeitos de direitos na

Everton Lazzaretti Picolotto

2008-01-01

23

Atomic-Scale Structure of Co–Mo–S Nanoclusters in Hydrotreating Catalysts  

Microsoft Academic Search

By means of scanning tunneling microscopy (STM), it has been possible to obtain the first atomic-scale images of the Co–Mo–S structure present in hydrodesulfurization (HDS) catalysts. Information on the catalytically important edge structures has been obtained by synthesizing single-layer Co–Mo–S nanoclusters using the Au(111) herringbone structure as a template. It is observed that the presence of the Co promoter atoms

J. V Lauritsen; S Helveg; E Lægsgaard; I Stensgaard; B. S Clausen; H Topsøe; F Besenbacher

2001-01-01

24

Investigation of nanoindentation on Co\\/Mo multilayers by the continuous stiffness measurement technique  

Microsoft Academic Search

The mechanical properties of evaporated Co\\/Mo multilayers with periodicity of 4–16 nm were investigated. The microstructures of the films were analyzed using X-ray diffraction and transmission electron microscopy. Continuous stiffness measurement technique was used in the nanoindentation tests to determine the hardness and elastic modulus of the films. A Hall–Petch-like behavior is observed in the Co\\/Mo multilayers, in which the

G. H. Yang; B. Zhao; Y. Gao; F. Pan

2005-01-01

25

XPS characterization of zirconium-promoted CoMo hydrodesulfurization catalysts  

Microsoft Academic Search

CoMo hydrodesulfurization catalysts (HDS) supported on mixed ZrO2-Al2O3 and ZrO2-SiO2 oxides have been prepared via a two-step impregnation using the incipient wetness method. The SBET method, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used for characterization of the samples. Increasing the ZrO2 content decreases the surface areas and the pore volumes of supported CoMo catalysts. The effect of

S Damyanova; L Petrov; P Grange

2003-01-01

26

Mesoporous molecular sieve MCM-41 supported Co–Mo catalyst for hydrodesulfurization of petroleum resids  

Microsoft Academic Search

In this work, we explored the potential of mesoporous zeolite-supported Co–Mo catalyst for hydrodesulfurization of petroleum resids, atmospheric and vacuum resids at 350–450°C under 6.9MPa of H2 pressure. A mesoporous molecular sieve of MCM-41 type was synthesized; which has SiO2\\/Al2O3 ratio of about 41. MCM-41 supported Co–Mo catalyst was prepared by co-impregnation of Co(NO3)2·6H2O and (NH4)6Mo7O24 followed by calcination and

Kondam Madhusudan Reddy; Boli Wei; Chunshan Song

1998-01-01

27

USO DE CINTURÃO VEGETAL COMO ESTRATÉGIA DE OBSTRUÇÃO VISUAL DE ÁREAS DEGRADADAS1  

Microsoft Academic Search

RESUMO - Na área de empréstimo da Ilha da Madeira (13 m de decapeamento) são desenvolvidos um conjunto de medidas conservacionistas desde 1993. Os resultados visuais são lentos e, como estratégia de agilizá-los, desenvolvemos um manejo paisagístico das bordaduras, onde o cinturão vegetal é composto por espécies arbustivas e arbóreas selecionadas em função de sua rusticidade, características plásticas individuais e

Magna Cunha; Ricardo VALCARCEL

28

Planificación urbana versus autoregulación: la ciudad de Fortaleza (Brasil) como tablero de juego de diferentes agentes  

Microsoft Academic Search

Fortaleza es una ciudad relativamente jóven en cuanto a su importancia como metrópoli regional, caracterizándose sobre todo en las últimas décadas por una muy fuerte dinámica demográfica, económica y política. En este contexto el espacio urbano se ha convertido en una mercancía de alto costo, disputada entre los intereses contradictorios de compañías influentes, especuladores inmobiliarios, políticos y el resto de

Waltraud Rosner; Ulli Vilsmaier

2007-01-01

29

Surface chemistry of model CoMo catalysts supported on planar. gamma. -AlâOâ  

Microsoft Academic Search

We have done some TPD work on our planar model catalysts and a planar aluminium oxide support. Benzene did not adsorb on a planar alumina surface significantly. Benzene adsorbed on the sulfied planar Co-Mo model catalysts significantly and the desorption starts at 450 K. We could not get enough information from this set of data due to evaporated of SiOâ

T. Sahin; W. K. Ford

1988-01-01

30

O papel dos Larídeos como portadores de Salmonella e Listeria spp  

Microsoft Academic Search

Resumo: Tal como noutros países, a população de gaivotas (larídeos) aumentou exponencialmente em Portugal. Para averi- guar as implicações na Saúde Pública deste sobrecrescimento, duzentas e oitenta e cinco amostras de fezes de gaivotas foram analisadas para dois agentes potencialmente patogénicos para o Homem, Salmonella spp. e Listeria sp. Isolou-se Salmonella sp em trinta e sete amostras (13%). Os serotipos

E. L. Duartea; M. M. Guerra; F. M. Bernardo; CIÊNCIAS VETERINÁRIAS

31

Topical observations on centric diatoms (Bacillariophyceae, Centrales) of Lake Como (N. Italy)  

Microsoft Academic Search

In 2001 a qualitative analysis of the centric diatoms in Lake Como was made. In this work 15 taxa of the genus of Stephanodis- cus, Cyclotella, Melosira, Aulacoseira and Stephanocostis were recorded. Among them the taxa Cyclotella pseudostelligera, C. comensis, C. comensis morphotype minima, C. costei, Stephanodiscus minutulus and Stephanocostis chantaicus were of special in- terest to us with regard

Wolfram SCHEFFLER; Giuseppe MORABITO

32

UMA INVESTIGAÇÃO DISCURSIVA ACERCA DE CALABAR - O ELOGIO DA TRAIÇÃO: O HUMOR COMO EVENTO POLIFÔNICO  

Microsoft Academic Search

1. Introdução Este estudo tem por objetivo fazer uma reflexão, sob a luz da análise do discurso da linha francesa, acerca do humor na literatura, mais precisamente, da linguagem transgressiva que se instaura no discurso literário-teatral em decorrência de fenômenos como ironia e paródia. Esse enfoque será norteado a partir da peça Calabar - o elogio da traição (1973), de

Manuella Felicíssimo

33

El desarrollo de la creatividad a través del proceso docente como problema social  

Microsoft Academic Search

El artículo tiene como propósito reflejar aspectos sobre el desarrollo de la creatividad en estudiantes de Educación Inicial del Programa Nacional de Formación de Educadores y Educadoras (PNFE). En tal sentido el Problema científico es ¿Cómo perfeccionar los modos de actuación en los estudiantes del PNFE? El Objetivo está dirigido a la Elaboración de una metodología para favorecer el desarrollo

Magaly Sarmiento Romero

2011-01-01

34

Land subsidence and Late Glacial environmental evolution of the Como urban area (Northern Italy)  

Microsoft Academic Search

The Late Glacial and Holocene geological and environmental evolution of the Como lacustrine–palustrine basin has been broadly reconstructed based on (a) the collection and analysis of more than 100 borehole stratigraphies, (b) the drilling of three new shallow boreholes and the analysis of a new geological section and (c) several in situ and laboratory analyses (mineralogical, organic and pollen content,

Valerio Comerci; Sabrina Capelletti; Alessandro M. Michetti; Sabina Rossi; Leonello Serva; Eutizio Vittori

2007-01-01

35

Pregadoras murshidat como agentes de mudança no Marrocos: uma perspectiva comparativa  

Microsoft Academic Search

Resumo As feministas marroquinas tem como objetivo promover posições de poder para as mulheres através da educação, da auto- consciência e do conhecimento de novos direitos legais; e também disseminando informações a respeito do novo código da família e do novo código trabalhista por meio de suas ONGs e grupos comunitários. O ativismo das mulheres contribuiu de maneira significativa para

Moha Ennaji

2008-01-01

36

Un estudio exploratorio sobre el desarrollo de creencias sobre síntomas como señales de hipertensión arterial  

Microsoft Academic Search

Aunque la hipertensión arterial es un trastorno asintomático, muchos pacientes hipertensos están con- vencidos de experimentar síntomas indicadores de los cambios en su tensión arterial (TA), y los con- sejos y prescripciones médicas pueden verse afectados por estas creencias. Diversos estudios han mos- trado que los pacientes hipertensos usan con frecuencia síntomas como indicadores del estado de su tensión arterial

Genoveva Granados Gámez; Jesús Gil Roales-Nieto; José Luis; Ybarra Sagarduy

2006-01-01

37

Hydrologic flowpaths and biogeochemical cycles in the subalpine Como Creek catchment, Colorado Front Range, USA  

NASA Astrophysics Data System (ADS)

An outstanding question for snowmelt-dominated watersheds of the western US are the responses of biogeochemical processes to two major drivers of environmental change: directional changes in climate and increasing dissolved inorganic nitrogen (DIN) deposition in wetfall. In the Colorado Front Range, atmospheric deposition of DIN has increased several-fold in the last 25 years. In response, nitrate concentrations at the alpine Green Lakes 4 (GL4) catchment have increased from 1985 to 2009 by 0.27 ?eq L-1 yr-1. In contrast, we see no directional change in either nitrate concentrations or fluxes in the subalpine Como Creek catchment. We hypothesize that differences in surface/groundwater interactions result in the differing behavior of stream nitrate between the alpine and subalpine catchments that are receiving similar amounts of DIN from atmospheric deposition. For both basins we sampled precipitation, snowpack, snowmelt, surface water, and subsurface waters. All water samples are analyzed for geochemical, nutrient and isotopic (?18O, ?D) composition. Stream chemistry data from the last ten years at Como Creek show increases in nitrate concentration during baseflow conditions and then a sharp decline during snowmelt. In contrast, in the alpine basin there is sharp increase in surface water nitrate during snowmelt. Hydrograph separation at the alpine GL4 using end member mixing analysis (EMMA) shows that stream flow is a mixture of three components, groundwater, talus, and new snowmelt that each contribute to roughly a third of discharge, with talus flow supplying the majority of nitrate. In contrast, and somewhat surprisingly, EMMA shows that for the subalpine Como Creek basin, annual streamflow is a mixture of only two components, groundwater and new snowmelt. During snowmelt the groundwater and snow contributions are nearly equal and subsurface flows dominate the remainder of the year. Newly installed piezometers at Como Creek provide evidence that the basin is largely a losing reach during snowmelt, with water levels in the piezometers increasing 5-7 m. After peak snowmelt however, Como Creek becomes a gaining stream, with piezometer levels dropping. Thus, both EMMA and piezometers show that surface-groundwater interactions are tightly coupled during snowmelt, with snowmelt at Como first replenishing the subsurface water deficit and increasing groundwater levels before contributing to discharge. Thus, in contrast to the alpine GL4 basin, DIN released in snowmelt is assimilated belowground as snowmelt infiltrates the subsurface in the subalpine basin. Interestingly, at the subalpine Como Creek basin, isotopic and geochemical solute concentrations undergo shifts during periods of winter baseflow prior to snowmelt. In winter much of the stream is frozen and we hypothesize that cryo-concentration of solutes and fractionation of isotopes may influence the concentrations of winter stream samples.

Cowie, R. M.; Williams, M. W.; Zeliff, M. M.; Parman, J.

2011-12-01

38

Trophic modifications in Lake Como (N. Italy) caused by the zebra mussel ( Dreissena polymorpha )  

Microsoft Academic Search

A large scale study on the western basin of Lake Como (N. Italy) was started in 1995 to examine the effects of the zebra mussel\\u000a colonization which began in early '90. Our results have been related to '91–92 data (pre-Dreissena period), before the maximum\\u000a colonization of zebra mussel. In spring and summer of the post-Dreissena period total phosphorus, P-PO4, nitrate

A. Binelli; A. Provini; S. Galassi

1997-01-01

39

Megaturbidite deposits in the Holocene basin fill of Lake Como (Southern Alps, Italy)  

Microsoft Academic Search

For the first time, limnogeological investigations have been carried out in Lake Como, the deepest lake of the Alps, combining a bathymetric survey (multibeam Simrad 3000) with a high-resolution seismic reflection study (single-channel 3.5 kHz sub-bottom profiler) and a coring campaign (gravity corer). This data set enables detailed characterization of the sedimentary subsurface in the western branch of the lake, the

Daniela Fanetti; Flavio S. Anselmetti; Emmanuel Chapron; Michael Sturm; Luigina Vezzoli

2008-01-01

40

Interseções entre cultura midiática, cibercultura e gamecultura: o Ragnarök como processo sociocomunicacional e mediador da conscientização ambiental  

Microsoft Academic Search

Os games on-line são estudados na atualidade como mídias interativas complexas. Neste artigo compreendemos os games on-line como resultados das relações entre a cultura midiática, cibercultura e gamecultura. Propomos demonstrar que sua finalidade está na socialização dos jogadores, nos \\

Igor Ramady; Lira de SOUSA; Henrique Paiva de MAGALHÃES

41

EL ANÁLISIS DE CITAS EN TRABAJOS DE INVESTIGADORES COMO MÉTODO PARA EL ESTUDIO DEL USO DE INFORMACIÓN EN BIBLIOTECAS  

Microsoft Academic Search

Resumen: Revisión bibliográfica sobre el análisis de citas como método para el estudio del uso y las necesidades de información por parte de los investigadores como usuarios de bibliotecas. Una vez comparados los estudios locales basados en las publicaciones de los usuarios potenciales de una biblioteca con los estudios de análisis de citas basados en la bibliografía circulante a nivel

Cristóbal Urbano Salido

2001-01-01

42

Hydrofining of Athabasca derived heavy gas oil over Ni-W and Co-Mo catalysts  

SciTech Connect

The hydrotreatment of heavy gas oil derived from Athabasca bitumen was studied in a trickle bed reactor over Ni-W and Co-Mo zeolite catalyst at 350-425/sup 0/C, 3.55 to 10.44 MPa, and LHSV of 1-4. The effects of temperature and liquid flow rates on the product were investigated. ASTM distillation, aniline point, viscosities and densities of the product oil were measured and correlated with various parameters. Activity of the catalysts for hydrodenitrogenation is compared.

Mann, R.S.; Diaz-real, R.

1987-01-01

43

Changing Electrolyte and Acido-Basic Profile in HIV-Infected Patients in the HAART Era  

Microsoft Academic Search

Background: HIV-infected patients may develop a variety of underreported metabolic abnormalities that may be classified into HIVAN, specific HIV abnormalities, coincidental renal disorders and anti-retroviral-treatment-induced side effects. Methods: Our descriptive cross-sectional study evaluates the prevalence of electrolyte and acid base disorders in HIV patients in the HAART era in a tertiary care teaching hospital. All consecutive HIV-infected patients (n =

Corinne Isnard Bagnis; Sophie Tezenas Du Montcel; Michele Fonfrede; Marie Chantal Jaudon; Vincent Thibault; Guislaine Carcelain; Marc Antoine Valantin; Hassan Izzedine; Aude Servais; Christine Katlama; Gilbert Deray

2006-01-01

44

Sorption of uranyl ions from various acido systems by amphoteric epoxy amine ion-exchange resins  

SciTech Connect

Sorption of uranyl ions by epoxy amine ampholytes with N-monomethylenephosphonic acid groups modified with pyridine or quaternary ammonium groups was studied under dynamic conditions. Heterocyclic nitrogen favors sorption of uranyl ion from fluoride, sulfate, and fluoride-sulfate solutions. The ESR studies of mono- and bimetallic forms of nitrogen-containing ampholytes with copper(II) as paramagnetic marker revealed the characteristics of uranium(VI) interaction with cation- and anion-exchange groups and its dependence on the fluoride content in solution.

Rychkov, V.N.; Radionov, B.K.; Molochnikov, L.S. [and others

1995-03-01

45

Characterization of K 2CO 3/Co-MoS 2 catalyst by XRD, XPS, SEM, and EDS  

NASA Astrophysics Data System (ADS)

MoS 2, Co-MoS 2 and K 2CO 3/Co-MoS 2 catalysts have been characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). XRD analysis indicates that Co-MoS 2 is a primary phase in K 2CO 3/Co-MoS 2 catalyst and the diffraction lines of Co-MoS 2 are not changed by the addition of K 2CO 3. Co 9S 8 phase is not present at Co/Mo mole ratio of 0.5 using a co-precipitation method for preparation of cobalt-molybdenum catalyst. The binding energies (BEs) of chemical species present on the surface of the catalysts are compared through the course of catalyst preparation. K 2CO 3/Co-MoS 2 catalyst has been investigated as a function of dispersion of K on the surface and exposure to a mixture of carbon monoxide and hydrogen (syngas) by scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). The distribution of potassium on the surface of the K-promoted catalyst is not uniform.

Iranmahboob, Jamshid; Hill, Donald O.; Toghiani, Hossein

2001-12-01

46

A Utilização da Astronomia como Tema Interdisciplinar e Aplicações de Objetos de Aprendizagem  

NASA Astrophysics Data System (ADS)

Este trabalho visa analisar a possibilidade de relacionar conteúdos aplicados no ensino fundamental e médio de forma interdisciplinar por intermédio da astronomia, com a intervenção de objetos de aprendizagem que possam integrar as disciplinas e a utilização de recursos tecnológicos. Em uma pesquisa prévia com 20 professores de uma escola estadual situada na cidade de Guarulhos foi observado que apenas 25% dos professores utilizam algum recurso tecnológico para o desenvolvimento de conteúdos pertinentes à sua disciplina, tais como sites e softwares educativos, sendo que a maioria absoluta continua ensinando apenas com livros didáticos. A maior parte dos professores apresenta dificuldades em trabalhar sua disciplina de forma interdisciplinar, ou seja, 75% dos professores preferem aplicar os conteúdos seguindo uma hierarquia linear de tópicos, evitando a discussão de temas que de alguma forma estão relacionados. A astronomia pode vir à fascinar o ser humano e despertar sua curiosidade promovendo um maior interesse no aprendizado, podendo favorecer análises interdisciplinares de forma lógica e objetiva, desta forma colocar a astronomia como tema motivador interdisciplinar, pode ser relevante no que se refere ao distanciamento da fragmentação dos conteúdos. No Estado de São Paulo, a implantação da proposta curricular no ensino fundamental e médio mostra claramente a inserção da astronomia na maior parte das séries, principalmente na 6ª série em que todo o bimestre se fala de astronomia.

da Silva, L. A.; Voelzke, M. R.

2008-09-01

47

IR study of the interaction of phenol with oxides and sulfided CoMo catalysts for bio-fuel hydrodeoxygenation  

Microsoft Academic Search

The adsorption of phenol on supported sulfide CoMo catalysts and on oxides is investigated using IR spectroscopy. On silica, phenol mainly interacts via hydrogen-bonding, whereas on alumina it dissociates on the acid–base pairs of this oxide leading to the formation of strongly adsorbed phenolates species. On a sulfided CoMo catalyst supported on alumina, phenol dissociates on the support but does

Andrey Popov; Elena Kondratieva; Jean-Pierre Gilson; Laurence Mariey; Arnaud Travert; Francoise Maugé

2011-01-01

48

Co–Mo catalysts for ultra-deep HDS of diesel fuels prepared via synthesis of bimetallic surface compounds  

Microsoft Academic Search

The synthesis of bimetallic Co–Mo compounds from ammonium heptamolybdate, citric acid and cobalt acetate for the preparation of catalysts for the ultra-deep hydrodesulfurization (HDS) of diesel fuel is reported. The structure of the Co–Mo compounds formed in solution and on alumina surfaces was studied by 95Mo, 17O, 13C, and 27Al NMR, FTIR, Raman and XAS spectroscopy. It was found that

Oleg V. Klimov; Anastasiya V. Pashigreva; Martin A. Fedotov; Dmitri I. Kochubey; Yuri A. Chesalov; Galina A. Bukhtiyarova; Alexandr S. Noskov

2010-01-01

49

DIABETES MELLITUS COMO FACTOR DE RIESGO DE DEMENCIA EN LA POBLACI?N ADULTA MAYOR MEXICANA  

PubMed Central

Introduccion La diabetes mellitus y las demencias constituyen dos problemas crecientes de salud entre la población adulta mayor del mundo y en particular de los paises en desarrollo. Hacen falta estudios longitudinales sobre el papel de la diabetes como factor de riesgo para demencia. Objetivo Determinar el riesgo de demencia en sujetos Mexicanos con diabetes mellitus tipo 2. Materiales y Metodos Los sujetos diabéticos libres de demencia pertenecientes al Estudio Nacional de Salud y Envejecimiento en México fueron evaluados a los dos años de la línea de base. Se estudió el papel de los factores sociodemográficos, de otras comorbilidades y del tipo de tratamiento en la conversión a demencia. Resultados Durante la línea de base 749 sujetos (13.8%) tuvieron diabetes. El riesgo de desarrollar demencia en estos individuos fue el doble (RR, 2.08 IC 95%, 1.59–2.73). Se encontró un riesgo mayor en individuos de 80 años y más (RR 2.44 IC 95%, 1.46–4.08), en los hombres (RR, 2.25 IC 95%, 1.46–3.49) y en sujetos con nivel educativo menor de 7 años. El estar bajo tratamiento con insulina incrementó el riesgo de demencia (RR, 2.83, IC 95%, 1.58–5.06). Las otras comorbilidades que aumentaron el riesgo de demencia en los pacientes diabéticos fueron la hipertensión (RR, 2.75, IC 95%, 1.86–4.06) y la depresión (RR, 3.78, 95% IC 2.37–6.04). Conclusión Los sujetos con diabetes mellitus tienen un riesgo mayor de desarrollar demencia, La baja escolaridad y otras comorbilidades altamente prevalentes en la población Mexicana contribuyen a la asociación diabetes-demencia.

Silvia, Mejia-Arango; Clemente, y Zuniga-Gil

2012-01-01

50

La valoraciòn econòmica de bienes y servicios ambientales como herramienta estrategica para la conservaciòn y uso sostenible de los ecosistemas  

Microsoft Academic Search

Resumen El trabajo corresponde a un estudio piloto hacia la implementación de una metodología que permita aproximar el valor monetario de los Bienes y Servicios Ambientales (BSA) ofertados por un ecosistema hídrico, caso “Ciénaga de la Caimanera, municipio de Coveñas, departamento de Sucre-Colombia”, como herramienta estratégica para incentivar la conservación y uso sostenible de los ecosistemas. Avanzar en procesos de

ADOLFO CARBAL HERRERA

2010-01-01

51

Transformaciones en el Discurso sobre la Epidemia al VIH como una Epidemia Sexuada - Paradojas y Enigmas en la Respuesta Global  

Microsoft Academic Search

Así como el discurso sobre sexualidad experimentó la influencia central de los procesos técnicos y políticos generados por la epidemia, igualmente el discurso global sobre la epidemia de SIDA a lo largo de tres décadas ha sido marcado por estos momentos cambiantes en el discurso sobre la sexualidad y su diversidad. Desde un momento inicial en que el SIDA fue

Carlos F. Cáceres

52

Electrochemical stability of Co-Mo intermetallic compound electrodes for hydrogen oxidation reaction in hot KOH solution  

NASA Astrophysics Data System (ADS)

In order to obtain a hydrogen electrode with high-performance and stability for H 2-O 2 alkaline fuel cells, Brewer-type Co-Mo alloys are manufactured in the 35 to 57 wt.% Mo composition range by an arc-melting method. The electrochemical stability of alloys composed of Co 3Mo and Co 7Mo 6 phases is investigated in hot KOH solution deaerated with N 2 gas by means of electrochemical methods such as cyclic voltammetry, potentiostatic polarization and potentiodynamic polarization. Co-Mo alloy is extensively dissolved because the cobalt in alloy is soluble in hot KOH solution. The dissolution current of the alloys increases with increasing electrolyte temperature, electrolyte concentration and Mo content in the alloy.

Lee, Chang Rae; Kang, Sung Goon

53

Factors Affecting the use of Dreissena polymorpha as a Bioindicator: the PCB Pollution in Lake Como (N. Italy)  

Microsoft Academic Search

The aim of this study was to assess the PCB pollutionof the South-Western branch of Lake Como by using thezebra mussel (Dreissena polymorpha) as abioindicator since its recent reintroduction. Someenvironmental and physiological variables influencingaccumulation processes of organochlorine compounds inDreissena were investigated because climaticfactors may affect life cycle, reproductive stage andage. PCB levels were highest in the soft tissues ofDreissena close

A. Binelli; S. Galassi; A. Provini

2001-01-01

54

A computa»c~ao numerica como ferramenta para o professor de F¶‡sica do Ensino Medio  

Microsoft Academic Search

A proposta deste trabalhoe apresentar ao professor de F¶‡sica do ensino medio uma forma de empregar recur- sos computacionais para esclarecer e aprofundar conceitos de F¶‡sica que s~ao explorados de forma limitada por n~ao se poder recorrer ao Calculo Diferencial e Integral. O p^endulo simplese usado como prototipo para o trata- mento sugerido. Mostramos que apenas com o aux¶‡lio de

Augusto Cesar; Claudio Gon; Marcus Vinicius; Tovar Costa

55

Hydrotreatment of Athabasca bitumen derived gas oil over Ni-Mo, Ni-W, and Co-Mo catalysts  

SciTech Connect

The hydrotreatment of Athabasca bitumen derived heavy gas oil containing 4.08% S and 0.49% N was carried out in a trickle bed reactor over Ni-W, Ni-Mo, and Co-Mo catalysts supported on zeolite-alumina-silica at 623-698 K, LHSV of 1-4, gas flow rate 890 m[sup 3][sub H2]/m[sup 3][sub oil] (5,000 sef/bbl), and pressure of 6.89 MPa. Analyses for viscosity, density, aniline point, ASTM mid boiling point distillation, C/H ratio, and percentage of N and S in the final product were carried out to characterize the product oil. The amounts of N and S removed indicated the hydrodenitrogenation and hydrodesulfurization activity of the catalysts. Results of zeolite-alumina-silica-supported catalysts are compared to those obtained with commercially available Ni-Mo, Ni-W, and Co-Mo on [gamma]-alumina. Ni-Mo supported on zeolite-alumina-silica was most active and could remove as much as 99 % S and 89% N present in the oil at 698 K. The data for HDN and HDS fitted the pseudo first order model. The kinetic model is described in detail.

Diaz-Real, R.A.; Mann, R.S.; Sambi, I.S. (Univ. of Ottawa, Ontario (Canada). Dept. of Chemical Engineering)

1993-07-01

56

Comparing the hydrodesulfurization reaction of thiophene on ?-Al 2 O 3 supported CoMo, NiMo and NiW sulfide catalysts  

Microsoft Academic Search

The thiophene hydrodesulfurization (HDS) reaction on ?-Al2O3 supported CoMo, NiMo and NiW sulfide catalysts was compared in order to gain insight into the promoter effect on direct desulfurization\\u000a (DDS) and hydrogenation (HYD) pathways. Ni-promoted Mo (or W) sulfide catalysts favor the hydrogen transfer reactions relative\\u000a to CoMo sulfide catalyst, which facilitates the direct route instead. This different performance and also

Sergio L. González-Cortés

2009-01-01

57

Registro Nazionale Malattie Rare: Malformazioni Congenite e Acido Folico (National Register of Rare Diseases: Congenital Malformation and Folic Acid).  

National Technical Information Service (NTIS)

It is estimated that in Italy at least 3% of babies are born with some congenital malformation. Scientific evidence demonstrates that the intake of folic acid by a woman prior the conception and during the early stages of pregnancy plays a role in prevent...

A. Pierini D. Taruscio F. Bianchi P. Salerno

2006-01-01

58

Effects of acido-basic support properties on the catalytic hydrogenation of acetylene on gold nano-particles  

NASA Astrophysics Data System (ADS)

Metallic gold nanoparticles supported on gamma-Al2O 3 and magnesia-alumina mixed oxide, with different magnesia content have been prepared by sol-gel method and characterized by different techniques (inductive coupled plasma-mass spectroscopy (ICP-MS), XRD, BET surface area analysis, transmission electron microscopy (TEM), CO2 and NH 3 temperature programmed desorption (TPD), H2 temperature programmed reduction (TPR) and FTIR of adsorbed CO2). Such systems were found to produce catalysts with controllable acidity, varying from catalyst possessing large density of acidic and low density of basic sites, others with acidic and basic sites of equal strength and density, and others with large basic and low acid sites densities, respectively. The catalytic assessment of the generated acidity was carried out using 2-propanol decomposition as a test reaction. The results obtained indicate that the presence of magnesia and reduced gold nanopartilces has imparted the catalysts, 1%Au/4%Mg-Al 2O3 and 1%Au/8%Mg-Al2O3, with significant base-catalytic properties. Acetylene hydrogenation and formation of coke deposits were investigated on a gold catalyst supported on gamma-Al2O3 and gold supported on alumina-magnisia mixed oxide with different gold content; 1%Au/gamma-Al 2O3, 1%Au/15%Mg-Al2O3, 2%Au/15%Mg-Al 2O3 and 4%Au/15%Mg-Al2O3. The effect of the H2/C2H2 ratio was studied over a range of values. The catalytic activity and selectivity towards ethylene and other products were investigated at different reaction temperatures. Acetylene hydrogenation was investigated in the presence and absence of ethylene in stream. It is investigated that the adsorption of the triple bond is preferred over the double bond and during selective catalytic (SCR) of C2H2 the two hydrocarbons do not compete for the same adsorption sites. The deactivation of catalysts was studied by temperature programmed oxidation (TPO). Higher content of coke over 1%Au/Al2O3 catalyst was investigated in contrast to the other catalysts in which the basisity of magnesia-alumina supports could have played an important role in inhibiting the acidic carbon formation by possessing smaller number and/or weaker acid sites.

Manda, Abdullah Ahmed

59

Como funciona un extintor  

NSDL National Science Digital Library

In this Spanish-language chemistry activity, learners use simple materials to explore how fire extinguishers work to put out fires. Safety note: this activity involves the use of a small candle with a burning flame.

Figueroa, Randall; Foundation, Cientec

2014-05-28

60

Phytoplankton assemblage structure and dynamics as indicator [-2pt] of the recent trophic and biological evolution of the western basin of Lake Como (N. Italy)  

Microsoft Academic Search

We studied the phytoplankton assemblage of the western basin of Lake Como (Northern Italy) during 1997. The phytoplankton assemblage was composed of 65 taxa, belonging to six taxonomic groups. Chlorophyta were represented by the highest number of taxa (28) followed by Bacillariophyceae (17), Cyanoprokaryota (9), Dinophyceae (6), Chrysophyceae (3) and Cryptophyta (2). The total assemblage density and biomass ranged from

R. Bettinetti; G. Morabito; A. Provini

2000-01-01

61

Un estudio de los Institutos Nacionales de la Salud indica que dos dosis de vacuna contra los VPH pueden proteger tanto como el tratamiento completo  

Cancer.gov

Dos dosis de Cervarix, la vacuna contra virus del papiloma humano (VPH), fueron tan efectivas como la pauta normal actual de tres dosis después de cuatro años de seguimiento. El estudio de vacuna en Costa Rica, patrocinado por el NCI, fue diseñado para evaluar la eficacia de Cervarix en una población determinada.

62

Respeito às Normas e Crescimento Econômico: Como Promotores Públicos Garantem o Cumprimento das Leis e Promovem o Crescimento Econômico no Brasil  

Microsoft Academic Search

Esta pesquisa examina como os membros do Ministério Público (MP) brasileiro conseguem que empresas instaladas em território nacional cumpram com a legislação trabalhista e ambiental sem perder a competitividade. Nos casos analisados, promotores e procuradores percebem que os gargalos que dificultam o cumprimento da lei estão freqüentemente fora das empresas infratoras e de suas respectivas cadeias de valor, e que,

Salo Vinocur Coslovsky

2008-01-01

63

Extended x-ray absorption fine structure determination of the structure of cobalt in carbon-supported Co and Co-Mo sulfide hydrodesulfurization catalysts  

SciTech Connect

The structure of the cobalt present in carbon-supported Co and Co-Mo sulfide catalysts was studied by means of x-ray absorption spectroscopy at the Co K-edge and by X-ray photoelectron spectroscopy (XPS). Thiophene hydrodesulfurization activities were used to measure the catalytic properties of these catalysts. By comparison of the EXAFS and XANES spectra of the catalysts with those of Co{sub 9}S{sub 8} and CoS{sub 2} model compounds, it was concluded that all Co atoms in a catalyst prepared with nitrilotriacetic acid as complexing agent were in the Co-Mo-S state, while the Co atoms in a conventionally prepared catalyst were partly present in a Co{sub 9}S{sub 8}-like structure and partly in a Co-Mo-S structure. The Co atoms in the Co-Mo-S state have a distorted 5- to 6-fold sulfur coordination, and on the average, every Co atom is in contact with two Mo atoms at a distance of 2.80 {angstrom}. On the basis of these data, the most likely position for the Co atoms is in front of the square sulfur faces of the MoS{sub 6} trigonal prisms along the edges of the MoS{sub 2} crystallites with two additional sulfur atoms or H{sub 2}S molecules attached.

Bouwens, S.M.A.M.; Koningsberger, D.C.; de Beer, V.H.J.; Prins, R. (Eindhoven Univ. of Technology (Netherlands)); van Veen, J.A.R. (Koninklijke/Shell-Laboratorium, Amsterdam (Netherlands))

1991-01-10

64

Effect of the nature of the additives of metal cations (Sr, Ba, and La) on the properties of CoMo hydrodesulfurization catalysts  

Microsoft Academic Search

The effect of the nature of the support modified with the ions of alkaline earth and rare earth elements (Sr, Ba, and La)\\u000a on the properties of Co-Mo catalysts for the hydrodesulfurization of dibenzothiophene (DBT), 4-methyldibenzothiophene (4-MDBT),\\u000a and 4,6-dimethyldibenzothiophene (4,6-DMDBT) was studied using a set of physicochemical and catalytic techniques. It was found\\u000a that the introduction of modifying additives decreased

E. V. Korneeva; A. S. Ivanova; G. A. Bukhtiyarova; P. V. Aleksandrov; V. I. Zaikovskii; I. P. Prosvirin; A. S. Noskov

2011-01-01

65

Low-cost and high-performance CoMoS4 and NiMoS4 counter electrodes for dye-sensitized solar cells.  

PubMed

Porous chalcogels CoMoS4 and NiMoS4 made by a facile solution reaction displayed good electrocatalytic activity in the redox reaction of the I(-)/I3(-) shuttle. Dye-sensitized solar cells with these ternary compounds as counter electrodes (CEs) showed photovoltaic performance similar to the devices made with noble metal platinum CE (7.46%). PMID:24022304

Zheng, Xiaojia; Guo, Jiahao; Shi, Yantao; Xiong, Fengqiang; Zhang, Wen-Hua; Ma, Tingli; Li, Can

2013-10-25

66

LA SUBASTA DE ACTIVOS FINANCIEROS COMO ESTRATEGIA PARA LA REDUCCIÓN DEL COSTO DE RESCATES BANCARIOS ORIGINADOS POR LAS CRISIS FINANCIERAS AUCTION OF FINANCIAL ASSETS AS A STRATEGY TO REDUCE THE COST OF BANK PURCHASE CAUSED BY THE FINANCIAL CRISIS  

Microsoft Academic Search

Resumen Desde los años setenta y hasta la fecha muchos países han experimentado crisis bancarias. Estos fenómenos, que han sido ocasionados por un conjunto de factores macro y microeconómicos, tanto internos como externos, se han dado tanto en países desarrollados como en países en vías de desarrollo, demostrado la fragilidad del sistema financiero ante el crecimiento explosivo del volumen de

Mónica Isabel; López Cardoza

67

Effect of heat treatment on the crystalline structure of martensite in iron-, nickel-, manganese- and silicon-doped Co-W and Co-Mo alloys  

SciTech Connect

X-ray investigation of the crystalline structure of martensite of Co-W-Fe, Co-Mo (Fe, Ni, Mn, Si) single crystals is performed after quenching and preliminary aging in [alpha] and [beta] phases. Continuous decomposition of a and [beta] solid solutions at aging at temperatures 500 700C is observed. In Fe- and Ni-doped alloys the multilayer martensite polytypes are formed. In Co-Mo-Fe and Co-Mo-Ni single crystals such polytypes are found at the satellite stages of decomposition.

Nikolin, B.I.; Babkevich, A.Yu.; Izdkovskaya, T.V.; Petrova, S.N. (Academy of Sciences of Ukraine, Vernadsky, (Ukraine). Institute of Metal Physics)

1993-02-01

68

Fibromialgia: o que é, como diagnosticar e como acompanhar?  

Microsoft Academic Search

SUMMARY The main objective of this article is to review the clinical characteristics, diagnóstic criteria and follow up methods of the fibromyalgia syndrome. The author also presents a brief historical review of the knowledge on this syndrome. It is also commented the necessity of this knowledge divulgation in order to obtain early diagnosis to improve the patients quality of life.

José Eduardo Martinez

69

Influence of the Additives and The pH On the Cobalt-Molybdenum (Co-Mo) Alloy Electrodeposited On n-TypeSilicon  

NASA Astrophysics Data System (ADS)

In this work, thin films of metal alloys (Co-Mo) have been electrodeposited onto silicon (Si) surface. The effects of two different additives (H3BO3 and Na2CO3) and the pH of the solution on the electrochemically deposited films (morphology, stochiometry…) have been investigated. The properties of the deposits were characterized by using X-Rays Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS). The results show that the morphology and the film composition depend on both the pH of the solution and the additives. The presence of boric acid favors the Mo deposition. Crack-free homogeneous deposits with a low percentage of molybdenum can be easily obtained from high pH bath. The deposits were shown to exhibits a good crystalline structure.

Fekih, Z.; Ghellai, N.; Fortas, G.; Chiboub, N.; Sam, S.; Chabanne-sari, N. E.; Gabouze, N.

70

Tal Como Somos/just as we are: an educational film to reduce stigma toward gay and bisexual men, transgender individuals, and persons living with HIV/AIDS.  

PubMed

In this article, the authors describe the development and dissemination of a film-based educational intervention to reduce negative attitudes toward gay and bisexual men, transgender women, and people living with HIV/AIDS in Latino communities, with a focus on youth. The intervention, Tal Como Somos/Just as We Are, is based on stigma and attribution theories, extensive formative research, and community input. Evaluation findings among educators and school youth suggest the film has the potential to effectively influence attitudes toward gay and bisexual men, transgender women, and people living with HIV/AIDS. The film and intervention are being disseminated using diffusion of innovations theory through community-based organizations, schools, television broadcasting, and film festivals. PMID:24377496

Ramirez-Valles, Jesus; Kuhns, Lisa M; Manjarrez, Dianna

2014-04-01

71

La biodiversidad como recurso estratégico  

Microsoft Academic Search

Con los nuevos desarrollos y avances ocurridos en los últimos años, vinculados al conocimiento genético, que motivaron que se desarrollara la lectura e interpretación del genoma humano, y que detonaron todo un sin fin de estudios (que se venia realizando a desde tiempos atrás), en los seres vivos del planeta principalmente animales y plantas, posicionaron a la biodiversidad de todo

Edgar Talledos Sánchez

2007-01-01

72

Photochemistry of transition-metal phthalocyanines. Analysis of the photochemical and photophysical properties of the acido(phthalocyaninato)rhodium(III) complexes  

SciTech Connect

The ultraviolet photochemistry of the rhodium(III) phthalocyanines Rh(ph)(CH/sub 3/OH)X with X = Cl/sup -/, Br/sup -/, and I/sup -/ was investigated at different wavelengths. The same action spectrum for the photoinduced hydrogen abstraction was obtained for the three compounds. The photonic energy of the excitation is degraded in part by emission at short wavelengths, e.g. lambda/sub max/ approx. = 420 nm. Such a violet emission, observed with phthalocyanines of Al(III), Rh(III), Co(III), and Ru(II), has been attributed to the relaxation of an upper /sup 3/pipi* excited state. The emission spectra at 77 K exhibited vibronic components with a separation between successive peaks ..delta..v approx. = 1.3 x 10/sup 3/ cm/sup -1/. A comparison between the excitation and action spectra shows the difference in the paths that populate the reactive npi* and upper emissive pipi* states. An investigation of the time dependence of the upper /sup 3/pipi* emission and lowest /sup 3/pipi* absorptions reveals the participation of triplet sublevels in the degradation of the excitation energy. The relationship between photoemissive and photoreactive states is discussed. 40 references, 6 figures, 2 tables.

Ferraudi, G.; Muralidharan, S.

1983-01-01

73

Sintese, marcacao e estudos biologicos do acido 16-(sup 131)I-hexadecanoico para cintilografias do miocardio. (Synthesis labeling and biological studies of 16-(131)I).  

National Technical Information Service (NTIS)

The increasing interest in obtaining radiopharmaceuticals for metabolic imaging of heart muscle led us to prepare 16-IODINE HEXADECANOIC ACID by tosilation of the corresponding hydroxy acid, following iodination with NaI and finally, introducing radioiodi...

M. K. Sato

1988-01-01

74

Extracao continua de uranio e molibdenio por lixiviacao com acido sulfurico. (Continuos extraction of uranium and molibdenum by lixiviation with sulfuric acid).  

National Technical Information Service (NTIS)

A methodology for collecting data of uranium and molibdenum extraction by lixiviation with sulfuric acid is showed. Discontinuous tests of lixiviation, time influence, temperature, granulation, acid/ore relation, oxidant/ore relation and solid percentage ...

M. Cripiani

1980-01-01

75

Photochemistry of transition-metal phthalocyanines. Mechanistic aspects of the photochemistry of the acido(phthalocyanine)rhodium(III) complexes investigated by continuous, flash, and laser flash photolysis  

SciTech Connect

Rh(ph)(CH/sub 3/OH)X, X = Cl, Br, or I, has been prepared and characterized. Continuous-wave irradiations of these phthalocyanines in the ultraviolet region of the spectrum, in acetonitrile and acetonitrile-isopropyl alcohol mixtures, result in the redox-induced substitution of the axially coordinated halide ions by the solvent. Even though the overall reaction was photosubstitution, the intermediates observed by conventional and laser flash photolysis were found to be rhodium(II) phthalocyanine and rhodium(III) phthalocyanine ligand radicals. The photoredox processes were attributed to the population of (n..pi..*) ligand-centered excited states that involve the lone electron pair from the bridge nitrogens of the phthalocyanine ligand. 9 figures, 3 tables.

Muralidharan, S.; Ferraudi, G.; Schmatz, K.

1982-08-01

76

Crystal structure of ATV(ORF273), a new fold for a thermo- and acido-stable protein from the Acidianus two-tailed virus.  

PubMed

Acidianus two-tailed virus (ATV) infects crenarchaea of the genus Acidianus living in terrestrial thermal springs at extremely high temperatures and low pH. ATV is a member of the Bicaudaviridae virus family and undergoes extra-cellular development of two tails, a process that is unique in the viral world. To understand this intriguing phenomenon, we have undertaken structural studies of ATV virion proteins and here we present the crystal structure of one of these proteins, ATV(ORF273). ATV(ORF273) forms tetramers in solution and a molecular envelope is provided for the tetramer, computed from small-angle X-ray scattering (SAXS) data. The crystal structure has properties typical of hyperthermostable proteins, including a relatively high number of salt bridges. However, the protein also exhibits flexible loops and surface pockets. Remarkably, ATV(ORF273) displays a new ? + ? protein fold, consistent with the absence of homologues of this protein in public sequence databases. PMID:23056221

Felisberto-Rodrigues, Catarina; Blangy, Stéphanie; Goulet, Adeline; Vestergaard, Gisle; Cambillau, Christian; Garrett, Roger A; Ortiz-Lombardía, Miguel

2012-01-01

77

Structure of the molybdenum sulfide phase in carbon-supported Mo and Co-Mo sulfide catalysts as studied by extended x-ray absorption fine structure spectroscopy  

SciTech Connect

The structure and dispersion of the active phase present in carbon-supported Mo and Co-Mo sulfide catalysts were studied by means of Mo K-edge EXAFS. In situ EXAFS measurements were carried out at liquid N{sub 2} temperature on freshly sulfided (at 673 K) catalysts. Due to the high signal-to-noise ratio of the experimental data, detailed information about the structural parameters of the active phase could be obtained. The catalysts probably consist of small MoS{sub 2}-like particles with an average local ordered structure of 5-6 Mo atoms (Mo/C) and 7-8 Mo atoms (Co-Mo/C). Comparison with literature data shows that the MoS{sub 2} dispersion in these carbon-supported catalysts is probably as good as in their alumina-supported counterparts. A detailed EXAFS data analysis shows the presence of carbon neighbors next to the Mo atoms in both catalysts with a Mo-C coordination distance of 2.1 {plus minus} 0.1 {angstrom}.

Bouwens, S.M.A.M.; Prins, R.; de Beer, V.H.J.; Koningsberger, D.C. (Eindhoven Univ. of Technology (Netherlands))

1990-05-03

78

Thermal effects on Co/Mo2C multilayer mirrors studied by soft x-ray standing wave enhanced photoemission spectroscopy  

NASA Astrophysics Data System (ADS)

Here is presented the spectroscopic study of the evolution of the first buried interfaces of a B4C capped Co/Mo2C multilayer mirror induced by thermal treatment up to 600°C. This kind of study is typically performed to simulate the response of multilayer optics working in extreme conditions, as for instance when irradiated by new high brilliance sources as Free Electron Lasers. In fact, the efficiency of multilayers is related to the optical contrast between the alternating high and low density layers, and then to the degree of interdiffusion and the creation or evolution of interface compounds. The analysis has been performed at the Co L23 edge with different soft x-ray spectroscopic techniques including diffuse and specular reflectivity, total electron and fluorescent yield at the BEAR beamline at Elettra (Trieste) (http://www.elettra.trieste.it/elettra-beamlines/bear.html). The presentation is focused on the spectroscopic results obtained by soft x-ray standing wave enhanced photoemission (XSW) from the Mo 3d, B 1s, C 1s, O 1s core levels by using a photon energy close to the Co L23 edge and corresponding to the first Bragg peak of the multilayer. The experimental results have been compared with simulations to obtain information both on the chemical state (e.g. oxidation state) and interface morphology in terms of profiles of distribution of elements and interdiffusion of B, oxidized B and C in the interface region. In summary, it is possible to conclude in favour of a good stability of the multilayer in the investigated temperature range, as confirmed by the good performance in terms of reflectivity. These results confirm the usefulness of XSW for this kind analysis of multilayer optics.

Giglia, A.; Mukherjee, S.; Mahne, N.; Nannarone, S.; Jonnard, P.; Le Guen, K.; Yuan, Y.-Y.; André, J.-M.; Wang, Z.-S.; Li, H.-C.; Zhu, J.-T.

2013-05-01

79

La mosca blanca Bemisia tabaci (Gennadius) como plaga y vectora de virus en fríjol común (Phaseolus vulgaris L.) The whitefly Bemisia tabaci (Gennadius) as pest and vector of plant viruses of common bean (Phaseolus vulgaris L.)  

Microsoft Academic Search

2 Resumen. La mosca blanca Bemisia tabaci es una de las plagas más ampliamente distribuidas en regiones tropicales y subtropicales del mundo donde afecta más de 600 especies de plantas cultiva- das y silvestres. Los daños que causa se deben a diversos efectos del insecto en las plantas atacadas, como el debilitamiento de la planta por la extracción de nutrientes;

MARÍA ELENA CUÉLLAR; FRANCISCO J. MORALES

2006-01-01

80

Dinámica del sistema agroforestal de chagras como eje de la producción indígena en el Trapecio Amazónico (Colombia) Chagras' agroforestal system dynamics as the basis for indigenous production in the Amazonian Trapezium (Colombia)  

Microsoft Academic Search

Resumen: La tradición indígena, la pertenencia a la cuenca Amazónica y la cercanía a un importante centro urbano como Leticia (Amazonas, Colombia) son factores que aportan elementos característicos al sistema de producción de Ciudad Jitoma y lo dife- rencian de otras formas de producción indígena y no-indígena, incluso dentro de la misma región ama- zónica. En el presente estudio se

Luz Amparo Triana-Moreno; Nohra Cecilia Rodríguez; Jesús García

81

Studies concerning the biogenesis of natural derivatives of lysergic acid  

Microsoft Academic Search

Riassunto Dall'esame della incorporazione di possibili precursori negli alcaloidi prodotti daC. paspali eC. purpurea risulta che non vi è una diretta correlazione fra la biogenesi delle catene laterali della ergometrina e dellaa-idrossietilammide dell'acido lisergico, e che l'ergometrina non è un precursore dei derivati peptidici dell'acido lisergico.

A. Minghetti; F. Arcamone

1969-01-01

82

Como Lo Hago Yo: Lipomas Medulares  

PubMed Central

Basados en la experiencia de 82 casos; en 5% se observaron anomalías pélvicas asociadas. En los menores de 3 años el motivo de consulta (85%) fue la tumoración. En los mayores de 3 años (42%) tenía problemas neurológicos. Solo el 24% preocupados por la tumoración. El objetivo de la cirugía es desanclar la médula y no remover la totalidad del lipoma. El lipoma de filum es el que es mas simple para operar. Aún cuando la escuela francesa propone operar solamente cuando hay síntomas favorezco cirugía preventiva. Favorezco una segunda cirugía si hay signos de anclaje postoperatorio, aún cuando observamos empeoramiento postoperatorio motor en 2.5% de los operados y urológico a largo plazo en 6% de los operados.

Portillo, Santiago

2014-01-01

83

Textile wastewater reuse in northern italy (COMO)  

Microsoft Academic Search

An extensive research programme has been carried out on advanced treatment of secondary effluents discharged by centralized activated sludge treatment plants fed on mixed textile\\/domestic effluents in order to produce a final effluent suitable for reuse in the textile factories. Activated carbon adsorption or membrane filtration (ranging from microfiltration to reverse osmosis) have been investigated at pilot plant scale in

A. Rozzi; F. Malpei; L. Bonomo; R. Bianchi

1999-01-01

84

Particle-associated contaminants in street dust, parking lot dust, soil, lake-bottom sediment, and suspended and streambed sediment, Lake Como and Fosdic Lake watersheds, Fort Worth, Texas, 2004  

USGS Publications Warehouse

A previous study by the U.S. Geological Survey of impaired water bodies in Fort Worth, Texas, reported elevated but variable concentrations of particle-associated contaminants (PACs) comprising chlorinated hydrocarbons, polycyclic aromatic hydrocarbons, and trace elements in suspended and bed sediment of lakes and streams affected by urban land use. The U.S. Geological Survey, in cooperation with the City of Fort Worth, collected additional samples during October 2004 to investigate sources of PACs in the watersheds of two impaired lakes: Lake Como and Fosdic Lake. Source materials and aquatic sediment were sampled and analyzed for PACs. Source materials sampled consisted of street dust and soil from areas with residential and commercial land use and parking lot dust from sealed and unsealed parking lots. Aquatic sediment sampled consisted of bottom-sediment cores from the two lakes and suspended and streambed sediment from the influent stream of each lake. Samples were analyzed for chlorinated hydrocarbons (organochlorine pesticides and polychlorinated biphenyls), polycyclic aromatic hydrocarbons, major and trace elements, organic carbon, grain size, and radionuclides.

Wilson, Jennifer T.; Van Metre, Peter C.; Werth, Charles J.; Yang, Yanning

2006-01-01

85

A indústria petroquímica no próximo século: como substituir o petróleo como matéria-prima?  

Microsoft Academic Search

THE PETROCHEMICAL INDUSTRY IN THE NEXT CENTURY: HOW TO REPLACE PETROLEUM AS RAW MATERIAL. The world reserves of petroleum will finish in about 100 years. For a tropical country like Brazil, biomass will be the natural substitute for petroleum. For the best utilization of biomass, it first needs to be separated into its principal components: cellulose, hemicelluloses, lignins, vegetable and

Ulf Schuchardt; Marcelo L. Ribeiro; Adilson R. Gonçalves

2001-01-01

86

40 CFR 98.223 - Calculating GHG emissions.  

Code of Federal Regulations, 2013 CFR

...acid produced per hour, 100 percent acid basis). n = Number of test runs. (d) If nitric acid...O mass emissions per year for nitric acid train âtâ (metric tons). m = Number of nitric acid trains. (i) You must...

2013-07-01

87

Como Lo Hago Yo: Tratamiento Quirurgico Del Mielomeningocele  

PubMed Central

En Argentina hay plan de fortificación con ácido fólico. Diagnostico prenatal no siempre es correcto. Cierre según técnica. Cerramos músculo. No favorecemos corpectomía temprana en casos de cifosis. Suturamos la plaqueta. Cerramos el plano muscular. Hidrocefalia: Válvula de derivación, generalmente dentro de los dos primeros meses. Ventriculostomía no está indicada. Chiari II. Laminectomia cervical alta. Siringomielia: Derivación desde la cavidad al peritoneo.

Portillo, Santiago

2014-01-01

88

Las líneas de aluminio neutro como diagnóstico cromosférico  

NASA Astrophysics Data System (ADS)

Se presenta un modelo atómico para el cálculo de las lí neas del Aluminio neutro que se forman en la cromósfera solar. En particular, se estudia la línea ? 3961 Å, que, por estar muy próxima a la lí nea H del Ca II y a H? es muy frecuentemente observada. Observaciones en esta lí nea obtenidas con el espectrógrafo a instalarse en el CASLEO, serán utilizadas para el estudio de fulguraciones solares.

Fernández Borda, R.; Mauas, P. J. D.

89

EL JUEGO COMO ESTRATEGIA DE APRENDIZAJE EN EL AULA  

Microsoft Academic Search

Games are widely recognized , without exemption of race, creed and ide- ology. Its origins are traced back to Greece civilization. The Helenic idea of the game appears in the epic of Homer and Hesiod, it was conceived as the notion of Physical power, then it becomes paidea as the innocent game of children. *Este trabajo ha sido financiado por

Carmen Minerva Torres

90

Como Planear Mi Vida = Make a Life for Yourself.  

ERIC Educational Resources Information Center

This booklet for teenagers about life planning is presented in parallel English and Spanish versions with a special focus on young Hispanics growing up in America. It discusses hopes and dreams that adolescents may have and gives tips for reaching goals. A sentence completion exercise is included to help readers set goals. Four important goals for…

Haffner, Debra; Casey, Sean

91

O FREEWARE HOT POTATOES E SEU POTENCIAL COMO  

Microsoft Academic Search

This article aims to reflect about the production and implementation of interactive exercises created with the Hot Potatoes software in Foreign Language classes. These exercises were applied to High School students at Prieto Martinez State School in Curitiba. The activities were made available on a web site and the students accessed them in the school computer laboratory. The Hot Potatoes

FERRAMENTA DE APRENDIZAGEM; LENY GALLEGO DONDA

2007-01-01

92

COMO ENTENDER LOS ESTANDARES INTERNACIONALES DE INFORMACIÒN FINANCIERA  

Microsoft Academic Search

RESUMEN Cada día que pasa, más países, más profesionales y más empresarios en el contexto global se interesan, estudian y aplican estándares internacionales de información financiera. En Colombia, estudiantes, profesores, profesionales y empresarios, también han venido acercándose al tema, muchos de ellos por necesidad, otros por curiosidad y otros para poder participar en las continuas disertaciones y confrontaciones que se

Helio Fabio Ramirez Echeverry; Luis eduardo Suarez Balaguera

2010-01-01

93

La inulina y derivados como ingredientes claves en alimentos funcionales  

Microsoft Academic Search

e - r e s ). SUMMARY. Inulin and derivates as key ingredients in functional foods. Inulin is a non-digestible carbohydrate that is contained in many vegetables, fruits and cereals. It is industrially produced from the chicory's root (Cichorium intybus) and it is widely used as ingre- dient in functional foods. Inulin and its derivate compounds (oligofructose, fructooligosaccharides) are usually

Lorena Madrigal; Elba Sangronis

2007-01-01

94

COMO: A UML-Based Component Development Methodology  

Microsoft Academic Search

Many organizations have begun to consider implementing applications using reusable components. They envision that writing a component once and reusing it in many subsequent software systems will effectively amortize the development cost among all users. Recent technology advances such as JavaBeans\\/EJB, COM, CORBA, and others spur this interest. However, the systematic development process and practical instructions for building software components

Sang Duck Lee; Young Jong Yang; Eun Sook Cho; Soo Dong Kim; Sung Yul Rhew

1999-01-01

95

Understanding Your Child's Learning Differences = Entienda como aprende su hijo.  

ERIC Educational Resources Information Center

Children who are bright and hard-working, yet find school a struggle, or children who can discuss things they have learned but whose written work is of surprisingly poor quality, might have learning differences that are hindering them from reaching their full potential. Some children are visual learners, others are auditory learners, and others…

Fielding, Elizabeth N.

96

Las técnicas GPS como herramienta en la gestión ambiental  

Microsoft Academic Search

RESUMEN El presente artículo describe el sistema GPS y sus aplicaciones de manera general y con relación a la gestión ambiental, Se hace referencia a estudios re- lativos a múltiples aplicaciones, estudios que ya se han realizado con un nota- ble éxito. De este artículo se desprende que el sistema GPS es totalmente via- ble en el campo y en

Roberto Rodríguez-Solano Suárez; Santiago Mancebo Quintana

97

Problematização como estratégia de educação nutricional com adolescentes obesos  

Microsoft Academic Search

Obesity is a public health issue with relevant social determinants in its etiology and where interventions with teenagers encounter com- plex biopsychological conditions. This study evaluated intervention in nutritional education through a problem-posing approach with 22 obese teenagers, treated collectively and individ- ually for eight months. Speech acts were collected through the use of word cards, observer recording, and tape-recording.

Érika Marafon Rodrigues; Maria Cristina Faber Boog

2006-01-01

98

A narrativa como uma técnica de pesquisa fenomenológica  

Microsoft Academic Search

Narrative as a phenomenological research technique.. The focus of this paper is the narrative as a modality of phenomenological research according to Walter Benjamin's conception. Using narratives, the author discusses the theoretical and methodological framework of phenomenology, based on heideggerian ontology and on the phenomenological and existential psychology. The purpose of this discussion is to demonstrate that experience, as a

Elza Dutra

2002-01-01

99

Como Iniciar una Cooperativa (How to Start a Cooperative).  

National Technical Information Service (NTIS)

This is a step-by step detailed guide to forming a cooperative, beginning with promotion, and going on to cover the following topics: The first meeting of potential members; work of the planning committee; second meeting of potential members; work of the ...

I. W. Rust

1966-01-01

100

Como Organizar una Cooperativa (How to Organize a Cooperative).  

National Technical Information Service (NTIS)

Four pamphlets explain co-ops in general, co-ops as businesses, how co-ops succeed and how to form a co-op. Co-ops in the American Private Enterprise System compares co-ops with other businesses. The Business Co-op explains how a co-op can function as a p...

1971-01-01

101

Desulfurization of benzenethiol on Co?Mo(110) phases  

Microsoft Academic Search

The desulfurization of benzenethiol on Co-covered Mo(110) (?Co = 0.25–1.3 ML) produces benzene, H2 and adsorbed carbon and sulfur. Benzene is formed via adsorbed phenyl thiolate, which is identified by X-ray photoelectron and electron energy loss spectroscopies. Benzene production is attributed to reaction on Co, since it is evolved at a temperature well below that required for sulfur-induced aggregation of

D. A. Chen; C. M. Friend; H. Xu

1998-01-01

102

Influenza delle infiltrazioni intra-articolari con acido ialuronico sugli indici clinici e sui livelli di ossido nitrico nell'artrosi temporomandibolare Influence of intra-articular injections of sodium hyaluronate on clinical features and synovial fluid nitric oxide levels of temporomandibular osteoarthritis  

Microsoft Academic Search

SUMMARY Objective: This study was designed to assess the effect of intra-articular injection of sodium hyaluronate (SH) on clin- ical findings of temporomandibular osteoarthritis (OA) and on synovial fluid (SF) levels of nitric oxide (NO). Methods: Twenty seven patients (7 men, 20 women, mean (SD) age 53.9 (11.8) years) with OA of the temporo- mandibular joint were randomly allocated to

L. Guarda Nardini; F. Oliviero; R. Ramonda; G. Ferronato

103

VALUTAZIONE DEL METABOLISMO AZOTATO - UREA, ACIDO URICO ED ALLANTOINA URINARI - IN BOVINE DA LATTE ALIMENTATE CON DIETA A BASE DI INSILATO DI MAIS O FIENO (NOTA PRELIMINARE) EVALUATION OF NITROGEN METABOLISM - URINARY UREA, URIC ACID AND ALLANTOIN - ON LACTATING DAIRY COWS FED CORN SILAGE OR HAY BASED DIET (PRELIMINARY STUDY)  

Microsoft Academic Search

RIASSUNTO Scopo del lavoro è stato determinare l'effetto dell 'insilato di mais rispetto al fieno, come principal e componente della dieta, sul tenore azotato urinario. Secondo u n piano sperimentale a cross over 2x2, 14 bovine di razza Frisona (212±99 gg. lattazione e 26.7±5.9 kg latte\\/ d) sono state alimentate con due diete isoenergetic he, isoproteiche e isofibrose. Dopo tre

104

Distribuicao de fotoassimilados (sup 14)C em funcao da temperatura noturna e da aplicacao do acido giberelico, durante a antese, em dois cultivares de tomate. (Distribution of (14)C photoassimilated at night temperatures and of the gibberellic acid application during the antese, in two tomato cultivars).  

National Technical Information Service (NTIS)

The effects of the nightly temperature of the airy part, as well as the gibberelic acid application in the leave and in the plant inflorescence, in the distribution of the (sup 14)C photo assimilated in two tomato cultivars are studied: one of them with d...

R. A. Pilatti

1981-01-01

105

Characterization of a sugar\\/polyol uptake system in the red alga Galdieria sulphuraria  

Microsoft Academic Search

The unicellular, acido- and thermophilic red alga Galdieria sulphuraria is unique in its ability to grow heterotrophically on at least 27 different sugars and polyols. The enzymatic machinery necessary for metabolizing this variety of compounds is constitutively expressed in the alga. The uptake system, however, has to be induced. From in vivo studies we conclude that the uptake system consists

Christine Oesterhelt; Claus Schnarrenberger; Wolfgang Gross

1999-01-01

106

Cryptoendolithic growth of the red alga Galdieria sulphuraria in volcanic areas  

Microsoft Academic Search

The habitat of the acido- and thermophilic red algae Galdieria sulphuraria and Cyanidium caldarium was examined in acidic hot sulphur springs in the vicinity of Naples (Italy). These species grew on soil and rocks, but a large part of the populations was cryptoendolithic. The endolithic algal layer (1–3 mm in thickness) was covered by amorphous silica (1–2 mm in thickness)

Wolfgang Gross; Jan Küver; Gilbert Tischendorf; Nicolas Bouchaala; Wilhelm Büsch

1998-01-01

107

Acidobacteria form a coherent but highly diverse group within the bacterial domain: evidence from environmental genomics  

Microsoft Academic Search

Summary Acidobacteria have been established as a novel phy- lum of Bacteria that is consistently detected in many different habitats around the globe by 16S rDNA- based molecular surveys. The phylogenetic diversity, ubiquity and abundance of this group, particularly in soil habitats, suggest an important ecological role and extensive metabolic versatility. However, the genetic and physiological information about Acido- bacteria

Achim Quaiser; Torsten Ochsenreiter; Christa Lanz; Stephan C. Schuster; Alexander H. Treusch; Jürgen Eck; Christa Schleper

2003-01-01

108

Archaebakterien und Phylogenie der Organismen  

NASA Astrophysics Data System (ADS)

The determination of the sequence similarity of the ribosomal 16 S RNA of many bacteria and a few higher organisms has shown that the methanogenic, halophilic, and acido-thermophilic organisms are phylogenetically separated from the kingdoms of the Eubacteria and Eukaryotes thus representing a third kingdom called “Archaebacteria”. Many biochemical and molecular biological features support this conclusion.

Kandler, Otto

1981-04-01

109

Selective copper(II) acetate and potassium iodide catalyzed oxidation of aminals to dihydroquinazoline and quinazolinone alkaloids  

PubMed Central

Summary Copper(II) acetate/acetic acid/O2 and potassium iodide/tert-butylhydroperoxide systems are shown to affect the selective oxidation of ring-fused aminals to dihydroquinazolines and quinazolinones, respectively. These methods enable the facile preparation of a number of quinazoline alkaloid natural products and their analogues.

Richers, Matthew T; Zhao, Chenfei

2013-01-01

110

Como ayudar a su hijo a aprender a leer ingles como segunda lengua. (How Can I Help My Child Learn to Read English as a Second Language.)  

ERIC Educational Resources Information Center

Suggestions for ways in which parents can help their children learn to read English are contained in this short booklet written in Spanish. Activities to be performed in the home, such as listening to and talking to the child in any language, reading aloud, reading for oneself, obtaining books for the home, and organizing study time for the child,…

Garcia, Ricardo L.; Deyoe, Rita Maxine

111

LUDICIDADE: O JOGO COMO MOTIVAÇÃO PARA ESTIMULAR O DESENVOLVIMENTO INFANTIL 1  

Microsoft Academic Search

This paper aims at collecting data that demonstrate the importance of the playful activities in literacy, since plays and ludic activities in according to the scholars are effective experiences that relate to the environment and must be applied in children in school phase. It has searched theoretical fundament for sustentation of ideas, reflections and concepts in expressive authors who approach

Lindaura Morais Azevedo

112

LAS LEVADURAS MARINAS COMO HERRAMIENTAS CIENTÍFICA Y BIOTECNOLÓGICA Marine yeasts as Scientific and Biotechnology tools  

Microsoft Academic Search

Marine yeasts comprise a group of microorganisms which existence has been questioned. As a result, the knowledge about its physiology and biotechnology use is scarce. The ecological importance of the marine yeasts is due, at least in part, to their contribution in the ocean's organic matter recycling. In addition, they are valuable sources of biological reagents, cell protein, vitamins, pigments,

Mar Bermejo

2004-01-01

113

Erupción cutánea eritematosa como primera manifestación de leucemia linfática prolinfocítica de células T  

Microsoft Academic Search

We present a case of a man 84 years-old, whose presentation feature was a cutaneous inespecific rash, and was diagnosed of T prolymphocy- tic leukaemia (T-PLL). In this review we analize actual aspects concer - ning biology, diagnosis, classification, prognosis and treatment of this rare mature T cell leukaemia.

L. Beltrán Fernández; B. di Martino Ortiz; J. GiI Herrera; J. A. López-Herce; J. de Portugal Alvarez; J. Menárguez Palanca

2002-01-01

114

Envelhecimento, Condições de Vida e Política Previdenciária. Como ficam as mulheres?*1  

Microsoft Academic Search

1 INTRODUÇÃO Historicamente, os sistemas previdenciários foram constituídos com base nos contratos de gênero, onde o homem assumia o papel de provedor e a mulher, o de cuidadora da casa, das crianças, dos idosos, ou seja, dos dependentes. Isso delimitava, claramente, a posição de dependência da mulher para o sistema. Desde a segunda metade do século passado, tem-se observado mudanças

Ana Amélia Camarano; Maria Tereza Pasinato

115

IMPACTO DE LOS JUEGOS GERENCIALES EN LOS PROGRAMAS DE ADMINISTRACIÓN DE EMPRESAS COMO HERRAMIENTA PEDAGÓGICA  

Microsoft Academic Search

This article has the object to present an analysis about the importance of managerial games as a pedagogic tool in some business ad- ministration programs in Bogotá D.C. In order to achieve this, a bibliographic review of works developed about managerial games was made, both in international and national scopes, as well as a fi eld work in fi ve

JAIME ANTONIO; PLATA BOGOYA; MORALES RUBIANO; MAYRA ALEJANDRA; ARIAS CANTE

2009-01-01

116

Inmigración y barbarie. La construcción social y política del inmigrante como amenaza  

Microsoft Academic Search

Immigration and barbarism. The social and political construction of the immigrant as it threatens This text analyzes the topic of the nowadays close relation between the international migra- tion and the resurgence of the racist ideas and behaviors. To explore the density of this topic, it leaves from a dynamic and constructivist perspective that, insisting on the complexity of the

Enrique Santamaría

2002-01-01

117

El tractocile como tratamiento de mantenimiento en la amenaza de parto prematuro en casos seleccionados  

Microsoft Academic Search

Preterm delivery is one of the main causes of perinatal morbidity and mortality. The management of this entity is an unresolved issue in modern obstetrics, since its incidence has not decreased.Currently, tocolytic treatment in acute episodes of preterm labor is maintained for 48h to induce lung maturation pharmacologically. However, the ideal situation is to prolong pregnancy until a healthy, term

M. Pato; C. Varillas; P. Frade; D. Gómez-Sánchez; L. Castro-Vilar; S. Blanco

2011-01-01

118

ESTUDO ELETROQUÍMICO DE RESISTÊNCIA À CORROSÃO LOCALIZADA DE AÇOS INOXIDÁVEIS PARA APLICAÇÕES COMO BIOMATERIAIS  

Microsoft Academic Search

Sandvik Bioline High-N and 316 LVM are two austenitic stainless steels specially developed to applications as biomaterials. Their localized corrosion resistance were investigated using electrochemical methods including potentiodynamics cyclic polarization and potentiostatic polarization, in a salt solution attenuated by fosfate and in solution for simulated crevices, i. e., solutions planned for tests of crevice corrosion. Sandvik SAF 2507 (a high-performance

C. Ulfvin

119

Metanol como combustivel: avaliacao da contaminacao atmosferica. (Methanol as fuel: evaluation of atmosphere contamination).  

National Technical Information Service (NTIS)

With the beginning of methanol use as automotive fuel in Sao Paulo city, 1990, Special measurements of methanol, formaldehyde, ethanol and acetaldehyde in atmosphere were realized. Other indicators of air quality such as carbon and ozone monoxide were als...

C. D. Alonso J. Romano M. L. G. Guardani

1991-01-01

120

Fibra solúvel e amido como fontes de carboidratos para terminação de novilhos em confinamento  

Microsoft Academic Search

The effects of starch or neutral detergent soluble fiber associated with two dietary levels of NDF on performance of finishing feedlot beef steers were evaluated in this trial. Twenty-four crossbred ½ Angus x ½ Nellore steers averaging 18 months of age and 329 ± 24 kg of body weight at the beginning of the trial were used. All four diets

Cristian Faturi; Jane Maria Bertocco Ezequiel; Nivia Araujo Fontes; Marcelo Gil Stiaque; Octávio Guilherme da Cruz e Silva

2006-01-01

121

UNA APROXIMACIÓN DESDE LA ANTROPOLOGÍA A LA HISTORIA DEL TURISMO PORTUENSE COMO ESTRATEGIA DE DESARROLLO LOCAL  

Microsoft Academic Search

Based on the cognitive distinction between tourist and native spaces, the article establishes the anthropological construction of tourism space. Since the early times of tourism in El Puerto as a seaside resort, the beach was both a healthy and a ludic space. The article analyses the causal relation among class society, leisure and health and the histocial conection between tourism

Antonio Miguel; Nogués Pedregal

1999-01-01

122

Como si le Falta un Brazo: Latino Immigrant Parents and the Costs of Not Knowing English  

ERIC Educational Resources Information Center

This study examined the perspectives of Latino/a immigrant parents about the place of English in their lives. The parents described how they had come to the United States with intentions of learning English, but various obstacles made it an overwhelming challenge. The author questions whether, despite rhetoric to the contrary, financially…

Worthy, Jo

2006-01-01

123

Como Ayudar a sus Hijos a Aprender Ciencia (Helping Your Child Learn Science).  

ERIC Educational Resources Information Center

Because most parents say they do not or cannot help their children with science, this booklet was designed to help them do so, easily and with pleasure for both parent and child. The introduction presents information on why and how parents should help their children and provides a general orientation to the ideas and activities offered in the…

Paulu, Nancy; Martin, Margery

124

Reappearance of Human Diphyllobothriasis in a Limited Area of Lake Como, Italy  

Microsoft Academic Search

Background: Very few sporadic cases of autochthonous diphyllobothriasis have been reported in Italy during the past 20 years, probably\\u000a due to the drastic decrease or disappearance of some fish species, mainly Perca fluviatilis L, known as the intermediate host of the infective larval stage of this tapeworm. However, increasing consumption of raw\\u000a or undercooked fish during the last years as

R. Terramocci; L. Pagani; P. Brunati; S. Gatti; A. M. Bernuzzi; M. Scaglia

2001-01-01

125

International Perspectives on Affirmative Action. A Bellagio Conference (Lake Como, Italy, August 16-20, 1982).  

ERIC Educational Resources Information Center

This volume presents nine papers read at a conference on affirmative action, sponsored by the Rockefeller Foundation and held at Columbia University in August 1982; a preface, summary paper, and list of participants are also included. Each paper addresses the issue of affirmative action within a different country and describes: (1) the policies…

Rockefeller Foundation, New York, NY.

126

OS MANUAIS DESTINADOS A PROFESSORES COMO FONTES PARA A HISTÓRIA DAS FORMAS DE ENSINAR  

Microsoft Academic Search

This work reports investigation results about Didactic and Teaching History Methodology published in Brazil during XX century. Aimed at teachers, the manuals might be taken as sources to investigate the presence of elements which, in specifical historical times, delimited the manners of thought and the manners of developing teaching in this country. The reflections brought by this work are part

Maria Auxiliadora Schmidt; Maria F. Braga Garcia

127

O AMBIENTE EAD COMO POSSIBILIDADE DE COMPLEXIFICAÇÃO DA APRENDIZAGEM DE LÍNGUA INGLESA  

Microsoft Academic Search

RESUMO A presença cada vez mais marcante das tecnologias de comunicação e informação no cotidiano dos sujeitos tem alertado aos profissionais da educação para a necessidade de construir e utilizar a potencialidade dessas ferramentas. O objetivo deste artigo é mostrar que os pressupostos da Teoria da Complexidade, num ambiente virtual, contribuem de forma decisiva para potencializar a aprendizagem da língua

Dulci Marlise BOETTCHER

128

Vinhoto e cama de frango como coadjuvantes na compostagem de bagaço de cana de açúcar  

Microsoft Academic Search

Resumo: Atualmente, a agricultura está passando por um proc esso de modernização, trazendo com isso inúmeros fatores negativos que influenciam na degradação do meio ambiente. Dejetos estão sendo jogados em lugares impróprios trazendo danos ao ar, solo e águas. Percebendo a gravidade deste problema, este trabalho foi realiza do visando contribuir para o melhoramento das condições ambientais e propor renda

Fernando Lira; Renato Cassol de Oliveira

2008-01-01

129

Guia Practica: Como Manejar Abejas Africanizadas (Practical Guide: How to Manage Africanized Bees).  

National Technical Information Service (NTIS)

The report discusses beekeeping equipment and methods, including beehive construction and dismantling. Covered are characteristics of African bees as compared with European types. Also, addresses various disease symptoms and general management.

R. Bailey D. Anderson

1986-01-01

130

Geni e o Zepelim X Bola de Sebo : a intertextualidade vista como um procedimento de originalidade  

Microsoft Academic Search

The aim of the comparative analysis between the intertextual variant Geni e o Zepelim , written by Chico Buarque de Holanda, and the basis text Boule de Suif , written by Guy de Maupassant, is to prove that, despite recovering another's discourse, intertextuality adds to the originality of the creation undertaken by the subject's enunciation variant. Such statement is justified

Fernanda Isabel Bitazi

131

O diafragma como método contraceptivo: a experiência de usuárias de serviços públicos de saúde  

Microsoft Academic Search

This study, started in August 1989, describes the acceptability of diaphragms as part of the daily routine of 194 women enrolled at five public health care centers in Osasco, (Greater São Paulo). Follow-up of the cohort was performed by semestral home interviews until August 1991. Our data indicate that the diaphragm can be a viable alternative within the public health

Suzana Kalckmann; Tania Giacomo do Lago; Regina Maria Barbosa; Wilza Villela; Samuel Goihman

1997-01-01

132

"Tanto Necesitamos De Aqui Como Necesitamos De Alla": "Leer Juntas" among Mexican Transnational Mothers and Daughters  

ERIC Educational Resources Information Center

This paper presents part of the results of a qualitative study about literacy practices of Mexican transnational mothers, who live in and frequently cross the border between two countries (the United States and Mexico). Drawing on sociocultural approaches to literacy and literature on transnationalism, I analyze one practice: "leer juntas"…

de la Piedra, Maria Teresa

2011-01-01

133

Fluoroquinolonas respiratorias como antibiótico de primera línea en neumonía adquirida en la comunidad, posición en contra  

Microsoft Academic Search

The newer fluoroquinolones are active against most of the potencial pathogens of community acquired pneumonia (CAP), and have high bioavailability and low toxicity. They could be considered a first line option for CAP. Ciprofloxacin presents low resistance rates for S. pneumoniae, but an increasing incidence of resistance among enterobacteriaceae. Quinolones' resistance is growing, in Hong Kong achieved 13.3%. In Argentina

Autores Alfredo Monteverde; Charles Feldman; Alfredo Monteverde

134

Como Lo Hago Yo: Defectos Del Cierre Del Tubo Neural En Nicaragua  

PubMed Central

En Nicaragua no hay un plan de forltificación de alimentos con ácido fólico. Las madres son muy jóvenes. En La Mascota operamos mas de cuarenta niños por año. Derivación tardía es un problema. La infección preoperatoria tiene que ser descartada. Vancomicina y Ceftriaxone estan indicadas. Estricta regla de asepsia operatoria. Suturamos la plaqueta para asemejar su forma al cilindro normal de la médula. No ceramos la capa de músculo.

Gonzalez, Juan Bosco

2014-01-01

135

The Struggle for Mexico's First Gay-Straight Alliance: Como una Novela Real  

ERIC Educational Resources Information Center

In 2004, a group of high school students at a private American school in Mexico City started the first gay-straight alliance in Mexico. A small group of conservative parents and a Mormon principal organized in opposition. This paper details the students' struggle to keep their club and offers lessons learned about student activism, school change,…

Macgillivray, Ian K.

2006-01-01

136

ROCA FOSFÓRICA ACIDULADA COMO FUENTE DE FÓSFORO EN UN SUELO ÁCIDO CON O SIN ENCALADO  

Microsoft Academic Search

Acidulated phosphate rock as phosphorus source in limed and non-limed acid soils Partial acidulation of the phosphate rock (PR) with sulfuric acid (SA) has been successfully used to improve its solubility and increment the agronomic effectiveness of this P source. To prove the efficiency of PR acidulated with SA and\\/or ammonium thiosulfate (ATS), two greenhouse experiments were conducted with potted

Armando Morillo; Omaira Sequera; Ricardo Ramírez

2007-01-01

137

Los derechos de participación como elemento de integración de los inmigrantes  

Microsoft Academic Search

Este informe pretende ofrecer un análisis de la relación entre las diferentes formas de participación social y política de las personas inmigrantes y el proceso de integración en las sociedades de acogida. La integración política de los extranjeros está estrechamente relacionada con los actuales debates sobre la ciudadanía y la inmigración, y se ha convertido en una cuestión emergente en

de Lucas Martín Javier; Añón Roig María José; Galiana Saura Ángeles; García Añón José; Mestre i Mestre Ruth; Miravet Bergón Pablo; Ruiz Sanz Mario; Simó Noguera Carles Xavier; Solanes Corella Ángeles; Torres Pérez Francisco

138

Utilización de datos de satélite operacionales en Centro América como apoyo en el manejo de desastres  

Microsoft Academic Search

In order for Central American countries to be able to respond to weather related disasters, they need to have strong meteorological forecasting capabilities, knowledge of the current state of the land and water resources, and emergency plans of action. In response to the devastating effects of Hurricane Mitch (October 1998), the United States Agency for International Development funded a project

BERNADETTE CONNELL; MARK DEMARIA; VILMA CASTRO LEÓN; ROSARIO ALFARO; Y JANICE SESSING

139

Fibropapilomatosis oral múltiple como manifestación inicial de Síndrome de Cowden. Caso clínico  

Microsoft Academic Search

Cowden syndrome is a rare hereditary disease included within hamartoma-type gastrointestinal polyposis. It is cha- racterised by associated mucocutaneous anomalies and by the extraordinary tendency to develop malignant neoplasia, mainly in the breast and thyroid. Early diagnosis of the syndrome and adequate tumoral screening in patients with mucocutaneous papillomatosis make it possible to make an earlier diagnosis of associated pathologies

Luis Miguel Capitán Cañadas; José Luis Salinas Sánchez; Sergio Luis Martínez Castillo; Ildefonso Leopoldo Labrot Moleón; David Durán Moreno; Darío Sánchez López; Eduardo Valencia Laseca; Capitán-Cañadas LM; Salinas-Sánchez JL; Martínez-Castillo SL

140

78 FR 36163 - Bitterroot National Forest, Darby Ranger District, Como Forest Health Project  

Federal Register 2010, 2011, 2012, 2013

...potential mortality of large diameter ponderosa pine caused by increasing mountain pine beetle populations; (2) reduce fuel loads and...project area to: (1) Reduce potential mountain pine beetle-caused tree mortality in large...

2013-06-17

141

EXAFS Study of the Structure of Co-Mo Hydrodesulfurization Catalysts.  

National Technical Information Service (NTIS)

By analysing the extended X-ray absorption fine structure (EXAFS) of the Mo absorption edge, structural information about both calcined and sulfided Mo/Al sub 2 O sub 3 and Co-Mo/Al sub 2 O sub 3 catalysts has been obtained. The calcined catalysts show on...

B. S. Clausen H. Topsoe R. Candia J. Villadsen B. Lengeler

1981-01-01

142

El embarazo en la adolescencia como problema público: una visión crítica  

Microsoft Academic Search

The present work is a review of the most commonly used arguments to define pregnancy during adolescence as a pub- lic problem: its supposed increase, contribution to acceler- ated population growth, adverse effects on maternal and child health and contribution to the persistence of poverty. Some elements are proposed for an alternative explanation with the intention of defining with more

CLAUDIO STERN

1997-01-01

143

Percepción de la imagen corporal como aproximación cualitativa al estado de nutrición  

Microsoft Academic Search

Objective. To compare body image perception with body mass index (BMI) calculated from the weight and size de- clared by subjects, and to evaluate its usefulness in classify- ing the nutritional status. Material and methods. A representative sample of the Spanish population was se- lected consisting of 517 males and 483 females older than 15 years of age. Variables were

Herlinda Madrigal-Fritsch; Jokin de Irala-Estévez; Miguel A. Martínez-González; John Kearney; Michael Gibney; J. Alfredo Martínez-Hernández

1999-01-01

144

Propiedades astrofísicas de objetos catalogados como cúmulos estelares en la Nube Menor de Magallanes  

NASA Astrophysics Data System (ADS)

We present the results on the age estimates of 11 Small Magellanic Cloud (SMC) clusters obtained for the first time from CCD Washington CT1 T2 photometry. CMD cluster features - mainly cluster RCs and MSTOs - turn out to be identificable when performing annular extractions around their re- spective centres, once they were cleaned from field star contamination. We estimated ages for the cluster sample using the T1 index, and metallicities from the SGB technique. The resultant ages and metallicities for the control clusters are in excellent agreement with those previously published, thus confirming our present age/metallicity scale. We also confirmed the ages and metallicities derived for the clusters by fitting theoretical isochrones. FULL TEXT IN SPANISH

Piatti, A. E.

145

Gerenciamento de riscos na prática ortodôntica: como se proteger de eventuais problemas legais  

Microsoft Academic Search

Introdução: A relação profissional-paciente na área de Ortodontia e Ortopedia facial é bas- tante desgastante face à longa duração dos tratamentos e, por causa disso, muitas vezes essa relação pode se deteriorar trazendo prejuízos a ambas as partes. Objetivo: Este trabalho visa informar o leitor, em linguagem acessível, sobre os principais problemas jurídicos que podem envolver o ortodontista em sua

Ricardo Machado Cruz; Carla Pádua

2008-01-01

146

Escuelas sin Drogas. Como Actuar. Edicion 1992. (Schools without Drugs. What Works. 1992 Edition).  

ERIC Educational Resources Information Center

Across the United States, schools and communities have found ways to turn the tide in the battle against drugs. This guidebook describes the methods they have used and the actions they have taken. The first section, "Children and Drugs" outlines the nature and extent of the drug problem and summarizes the latest research on the effects of drugs on…

Department of Education, Washington, DC.

147

Análisis integral como sistema de medición y gestión de capitales intangibles en organizaciones y territorios  

Microsoft Academic Search

In the knowledge society, it is necessary to have new approaches of measurement and management for all the intangible ones that generate value, not only for companies but also for the national, regional or local territories. The most widespread methods have begun in the business area; these are support to the macro systems implemented in the last years, under the

Victor Raúl LÓPEZ RUIZ; Domingo NEVADO PEÑA

2008-01-01

148

Characterization, cloning, and evolutionary history of the chloroplast and cytosolic class I aldolases of the red alga Galdieria sulphuraria  

Microsoft Academic Search

Two fructose-1,6-bisphosphate aldolases from the acido- and thermophilic red alga Galdieria sulphuraria were purified to apparent homogeneity and N-terminally microsequenced. Both aldolases had similar biochemical properties such as Km (FBP) (5.6–5.8?M) and molecular masses of the native enzymes (165kDa) as determined by size exclusion chromatography. The subunit size of the purified aldolases, as determined by SDS–PAGE, was 42kDa for both

Wolfgang Gross; Dido Lenze; Ulrich Nowitzki; Jörg Weiske; Claus Schnarrenberger

1999-01-01

149

Effect of additives on properties of V 2O 5\\/SiO 2 and V 2O 5\\/MgO catalysts  

Microsoft Academic Search

Effect of additives (A) of main group elements (P and K) and of transition metal ions (Ni, Cr, Nb and Mo) introduced to VOx\\/SiO2 (VSiA) and VOx\\/MgO (VMgA) catalysts on their structure and physicochemical properties, has been studied with the use of XRD, XPS, Raman spectroscopy, H2-TPR and TPD of adsorbed propane. Acido-basic properties were determined from IR spectra of

A. Klisi?ska; S. Loridant; B. Grzybowska; J. Stoch; I. Gressel

2006-01-01

150

[Gastric secretory function in patients with chronic renal insufficiency and gastroduodenal hemorrhage].  

PubMed

Gastric hypersecretion occurrence in patients, suffering chronic renal insufficiency (CHRI), creates conditions for acido-peptic gastroduodenal zone affection with possible formation of erosive-ulcerative defects, complicated by hemorrhage. In 116 patients, suffering CHRI, the state of gastric mucosa secretory function was studied up. In patients with an acute gastrointestinal hemorrhage and CHRI in conservative and terminal stages the analysis of acidity was conducted. PMID:22295545

Ioffe, I V; Novoskol'tseva, I G

2011-10-01

151

ALMIDÓN MODIFICADO DE YUCA COMO SUSTITUTO ECONÓMICO DEL AGENTE SOLIDIFICANTE PARA MEDIOS DE CULTIVO DE TEJIDOS VEGETALES  

Microsoft Academic Search

SUMMARY Plant tissue culture methodologies were developed five dec- ades ago. However, expensive reagents and faulty technology transfer have prevented farmers in developing countries to ben- efit from these techniques. In Venezuela, cassava (Manihot esculenta Crantz) is a neglected crop harvested by poor farmers in marginal areas. Several constraints plot against large scale cassava cultivation, but the most important ones

Gustavo Romay; Juan Matehus; Armando Gerstl; Rodrigo Rueda; María A. Santana

2006-01-01

152

El Balneario Marítimo como Espacio Utópico: los casos de Portmeirion (Gales), Thorpeness (Inglate rra), Pedernales (España) y Piriápolis (Uruguay)  

Microsoft Academic Search

(Estados Unidos). 1 Esta ponencia dirige la mirada a otro tipo de balneario marítimo, la pequeña colonia de vacaciones establecida por un empresario por motivos utópicos, tratando de construir un espacio de placer para llevar a habitantes y visitantes hacia un estado de perfecta tranquilidad y de aislamiento de los problemas del mundo exterior. Propongo un análisis comparativo de cuatro

Reino Unido

153

Tetrahydrothiophene desulfurization on Co-Mo/. gamma. -Al sub 2 O sub 3 : A temporal analysis of products (TAP) investigation  

SciTech Connect

The catalytic reactions of tetrahydrothiophene, thiophene, 1-butene, 1,3-butadiene, and n-butane with hydrogen were studied at low pressure over a commercial cobalt molybdate catalyst. The formation sequence of tetrahydrothiophene desulfurization products was monitored with submilli-second time resolution using the temporal analysis of products (TAP) transient microreactor technique. The TAP experiments showed that butene and were the only hydrocarbon desulfurization products formed, although rapid dehydrogenation to thiophene was also observed. The exceptional time resolution of the TAP spectrometer provided evidence that the butene formed could not be accounted for by a mechanism involving butadiene hydrogenation. The results suggested a desulfurization mechanism for tetrahydrothiophene wherein C{sub 4} hydrocarbon formation proceeds via a surface butene thiolate intermediate produced by a single {beta}-hydride elimination of the intermediate, while rapid C-S bond hydrogenolysis involving surface hydrogen is responsible for butene formation.

Moser, W.R.; Rossetti, G.A. Jr. (Worcester Polytechnic Institute, MA (USA)); Gleaves, J.T.; Ebner, J.R. (Monsanto Chemical Co., St. Louis, MO (USA))

1991-01-01

154

Adenocarcinoma de colo uterino com disseminação linfática apresentando-se como carcinoma en cuirasse da vulva: relato de caso.  

PubMed

We report the case of a patient with carcinoma "en cuirasse" of the vulva. Case report: A female patient presented complaining of inguinal lymphadenopathy. Lymph node excision, immunohistochemistry analyses, and further exams showed the presence of cervical adenocarcinoma. The cancer was surgically removed and the patient was treated with radiotherapy and chemotherapy with a good initial response. Some months later she presented with intense edema of the lower limbs, hardening and thickening of the labia majora, and pelvic and genital ulceration. A cutaneous biopsy with subsequent immunohistochemical staining showed lymphatic dissemination of adenocarcinoma to the vulva. Discussion: Carcinoma "en cuirasse" is a rare presentation of cutaneous metastasis in which the affected skin shows hardening and induration, acquiring a sclerodermoid appearance. This is, to the best of our knowledge, the first report in Brazil of carcinoma "en cuirasse" of the vulva associated with cervical adenocarcinoma. PMID:24852775

Silva de Lima, Adma; Casemiro, Karla Patricia; Rovere, Rodrigo Kraft

2014-01-01

155

EL DELITO DE AMENAZA COMO FORMA DE VIOLENCIA CONTRA LA MUJER EN EL MUNICIPIO BÁGUANOS DE LA PROVINCIA DE HOLGUÍN  

Microsoft Academic Search

Para llevar a cabo el presente trabajo se partió de una revisión bibliográfica en la cual se sustenta el análisis y la sistematización de los contenidos teóricos referidos. La recogida de información se realiza a través de un conjunto de técnicas complementarias entre sí respondiendo a los objetivos de la investigación. En la obtención de los datos se parte primeramente

Sara Dilaidis Rodríguez Betancourt

2011-01-01

156

How Can We Provide Safe Playgrounds? = Como podemos proveer lugares con juegos infantiles que no sean peligrosos para los ninos?  

ERIC Educational Resources Information Center

Outdoor playgrounds can be exciting places where children explore their environment and develop motor and social skills; however, they can also pose serious safety hazards. With the exception of California, no mandatory state or federal standards currently exist regarding manufacture or installation of playground equipment or surfaces. The…

ACCESS ERIC, Rockville, MD.

157

Uso de imagens LANDSAT como subsídio ao estudo da dispersão de sedimentos na região da foz do rio São Francisco  

Microsoft Academic Search

The construction of a sequence of water reservoirs along the lower São Francisco river basin has caused a severe change in the supply of water and sediments to the coastal zone. We present in this paper a first attempt to use Landsat data to estimate de Suspended Sediment Content (SSC) of the coastal plume. A simple log model proposed by

João Antonio Lorenzzetti; Eduardo Negri

158

Insuficiencia respiratoria aguda como forma de debut de síndrome de Lambert-Eaton asociado a carcinoma pulmonar de células pequeñas  

Microsoft Academic Search

The Lambert-Eaton myasthenic syndrome is a rare disorder of neu- romuscular transmission, usually presenting as a paraneoplastic process associated with a small cell lung cancer. Recently, respiratory muscular impairment has been described in these patients. Acute respiratory failu- re as a presenting symptom has been reported in few cases. We present a case of acute ventilatory failure as the first

F. Jover; E. Chiner; J. M. Arriero; J. Signes-Costa; J. Marco; V. Izura

2002-01-01

159

POLÍTICAS PÚBLICAS DE FORMACIÓN PARA EL TRABAJO COMO ESTRATEGIA DE INCLUSIÓN SOCIAL. HISTORIAS DE LA ARGENTINA NEOLIBERAL  

Microsoft Academic Search

Este trabajo resume, por un lado los aportes centrales de una investigación más amplia denominada Políticas Públicas y Formación pa ra el Trabajo en Argentina. Articulaciones de una Política Neoliberal2 , cuyo eje fue e l análisis, desde una perspectiva c rítica, de un Programa focalizado e implementado a escala nacional en la República Argentina - el Proyecto Joven -

Esther Levy

160

"Tras de un Amoroso Lance" como Estructura Expresiva (The Poem, "Behind the Amorous Cast" as an Expressive Structure).  

ERIC Educational Resources Information Center

An analysis of a poem by San Juan de la Cruz (St. John of the Cross), the sixteenth century Spanish mystic, identifies symbols and images, explains themes, and offers a synthesis of his structural patterns. The poem, "Tras de amoroso lance", deals with the theme of the search of the beloved (i.e., the soul) for the lover, and incorporates the…

Bratosevich, Nicolas

1967-01-01

161

Como ayudar a los padres a prevenir el envenenamiento por plomo (Helping Parents Prevent Lead Poisoning). ERIC Digest.  

ERIC Educational Resources Information Center

Children are at greater risk than adults for lead poisoning because children absorb lead more readily than adults, and a small amount of lead in children's bodies can do a great deal of harm. This Spanish-language Digest summarizes some of the causes and effects of childhood lead poisoning and suggests some lead poisoning prevention strategies…

Binns, Helen J.; Ricks, Omar Benton

162

Efecto potenciador de la respuesta inmune contra el Factor de Crecimiento Epidérmico mediante el empleo de liposomas como adyuvante  

Microsoft Academic Search

Enhancing effect on the recombinant Epidermal Growth Factor immune response using liposomes as adjuvant. The use of liposomes as adjuvant in order to potentiate the immune response against epidermal growth factor (EGF) was studied. Firstly, the attention was focused on the influence of phospholipid composition of dehydration- rehydration vesicles (DRV) on the EGF encapsulation efficiency and its release from liposomes.

María del Carmen; Luzardo Lorenzo; Lesly Calderón Domínguez; Isabel Fabiola; Pazos Santos

163

EL COLOR DE FONDO Y LA DUREZA COMO ESTIMADORES NO DESTRUCTIVOS DE LA FIRMEZA DE PULPA EN DURAZNOS 1  

Microsoft Academic Search

The objective of this experiment was to evaluate the performance of Durofel, a hardness meter (Shore A adapted by Ctifl) and a chromameter Minolta CR 300 measuring ground color as non destructive estimators of firmness in melting flesh peaches. Correlation between firmness, measured with Durofel and measured with a penetrometer, and between firmness and ground color, measured with a chromameter

Claudio O. Budde; Alejandro Tula; Gustavo Polenta; Carlos Lucangeli; Ricardo Murray; Casilla de Correo; Aires Argentina

2003-01-01

164

VIABILIDADE DO USO DA PROTEÍNA TEXTURIZADA DE SOJA COMO INGREDIENTE EM SUCEDÂNEO DE LEITE PARA BEZERROS1  

Microsoft Academic Search

The production of calves from dairy herds reared on whole milk is not economically viable. Different milk substitutes with animal or vegetal protein have been tested, but always showed allergic or practical management problems. The texturized soybean protein is obtained from whole soybean extruded, which takes a better digestibility and an inactivation of allergic principles. The objective of this trial

VERA LÚCIA BANYS; PAULO CÉSAR DE; AGUIAR PAIVA; ROBERTO MACIEL CARDOSO; LUIZ RONALDO DE ABREU; JUAN RAMÓN OLALQUIAGA PÉREZ; AIRDEM GONÇALVEZ DE ASSIS

165

Caracteristicas de la Instruccion Programada como Tecnica de Ensenanza (Characteristics of Programed Instruction as a Teaching Technique).  

ERIC Educational Resources Information Center

This discussion of programed instruction begins with the fundamental psychological aspects and learning theories behind this teaching method. Negative and positive reinforcement, conditioning, and their relationship to programed instruction are considered. Different types of programs, both linear and branching, are discussed; criticism of the…

Dorrego, Maria Elena

166

ESTUDIO Y ANÁLISIS DE LAS LISTAS DE DISTRIBUCIÓN EN PROYECTOS DE SOFTWARE DE CÓDIGO ABIERTO COMO MEDIO PARA COMPARTIR CONOCIMIENTO  

Microsoft Academic Search

This research explores the role of mailing lists in open source software projects as a tool for knowledge sharing and problem resolution. One of the benefits that firms can derive from using Open Source Software (OSS) is informal development collaboration. The primary tool for collaboration and coordination are group mailing lists, followed by asynchronous discussion forums, bug reports, and chat.

Martínez Torres; M. R. Toral Marín; S. L. Barrero García

2008-01-01

167

Evaluación de los ácidos grasos n-3 de 18 especies de pescados marinos mexicanos como alimentos funcionales  

Microsoft Academic Search

SUMMARY. n-3 fatty acid evaluation in eighteen Mexican ma- rine fishes as functional food. The objective of the present work was to characterize the n-3 fatty acid composition of eighteen spe- cies of Mexican marine fishes and to evaluate their potential as func- tional food. Total lipids and fatty acid (FA) compositions were ob- tained of the edible portion of

Castro-González MI; Ojeda VA

168

Estudo Reológico de Tintas de Poliuretano Contendo PAni-DBSA Aplicadas como Materiais Absorvedores de Microondas (8-12 GHz)  

Microsoft Academic Search

Resumo: Neste trabalho preparou-se tintas condutoras baseadas em blendas de poliuretano contendo polianilina em diferentes proporções. Estudou-se as influências do método de dopagem da polianilina (PAni) e do tempo de processamento da mistura no comportamento reológico da tinta. Verificou-se que a dopagem, com o ácido dodecilbenzeno sulfônico (DBSA), por processamento reativo (PAni-DBSA-pr) afetou, de maneira mais acentuada, a viscosidade da

Rogério S. Biscaro; Edson C. Botelho; Centro ITA; Técnico Aeroespacial; Marta F. K. Takahashi

2002-01-01

169

International Workshop on Mathematical Methods in Combustion Held in Como, Italy on 18-22 May 1992.  

National Technical Information Service (NTIS)

The overall objective of the Workshop was to try to improve communications and promote cross-fertilizations between applied mathematicians and computational scientists, by pointing out promising directions as well as effective means of interaction. Specif...

L. De Luca, E. S. Oran, M. Q. Brewster, M. K. Strelets, B. V. Novozhilov

1992-01-01

170

Relación entre lípidos séricos y estado de las vitaminas C y E como antioxidantes en adultos mayores venezolanos  

Microsoft Academic Search

RESUMEN. En el envejecimiento se observa tendencia a hiperlipidemias, cambios en la distribución de lipoproteínas y una declinación del sistema de defensa antioxidante del organismo. El objetivo de este estudio fue relacionar concentraciones séricas de colesterol total, fracciones, triglicéridos y Vitaminas C y E. Se evaluaron 61 adultos mayores de 60 años de edad, de enero-marzo, 2006. Se diagnosticó estado

Lesbia Meertens; Gloria Naddaf; Adelmo Rodríguez

2008-01-01

171

VINAZA Y COMPOSTA DE CACHAZA COMO FUENTE DE NUTRIENTES EN CAÑA DE AZÚCAR EN UN GLEYSOL MÓLICO DE CHIAPAS, MÉXICO  

Microsoft Academic Search

SUMMARY The effects of vinasse and filter cake compost were evaluated on the chemical properties of the soil, culture nutrition, sugar- cane yield and juice quality, as well as on the comparative anal- ysis of the costs of its use as an organic fertilizer. The experi- ment was carried out in the Pujiltic sugarmill, Chiapas, México. The treatments were vinasse

Gloria I. Hernández Melchor; Sergio Salgado García; David J. Palma López; Luz del C. Lagunes; Mepivoseth Espinoza; Castelán Estrada; Octavio Ruiz Rosado; Lagunes Espinoza

2008-01-01

172

A statistical evaluation of preparation conditions on the performance of Ce-promoted CoMo Fischer-Tropsch catalyst  

Microsoft Academic Search

This paper describes a statistical approach to the optimal selection of preparation conditions for a ceria-promoted Co-Mo\\u000a catalyst used during CO hydrogenation. Eight catalyst samples based on a full factorial design were prepared via incipient\\u000a wetness method. Evaluation was carried out in laboratory packed bed reactor using synthesis gas containing H2:CO=2 at 280 °C and 110 kPa. BET was unaffected

K. Eisenacher; Adesoji A. Adesina

2000-01-01

173

Sistemas de Informação Geográfica como ferramenta para o diagnóstico e gestão de macrobacias no arco do desmatamento na Amazônia  

Microsoft Academic Search

The Amazon basin is rather known by their peculiar ecossystem with high biodiversity spreaded out by a large drainage basin which produces almost 15% of the world's drinking water. The human impacts of deforestation during he last 30 years are responsible for about 653.000Km2 of a clear forest surface shaped and denominated as the deforestation arch. Most of the deforestation

Ralph Trancoso

2005-01-01

174

La dinámica de las publicaciones y las patentes como una aproximación al desarrollo científico y tecnológico de los países  

Microsoft Academic Search

The purpose of this paper is to propose a characterization, different from the traditional ones, of developed and developing countries, in terms of science and technology. First, we identify the generating processes of the publication and patent series of the countries. Then we relate the development stages of the countries (Banze (2000)) with the dynamics of the series. The results

Clemente Forero; Andrés Zambrano

2004-01-01

175

LA GESTION DEL RIESGO EN COLOMBIA COMO HERRAMIENTA DE INTERVENCIÓN PÚBLICA PARA LA PREVENCIÓN Y MITIGACIÓN DE DESASTRES (1982 - 2008)  

Microsoft Academic Search

Los desastres ocurridos en centros urbanos, no sólo en Colombia (sismo de 1983 en Popayán, el sismo de 1999 en el eje cafetero), sino en otros países del mundo1, han generado interés acerca de las implicaciones de las amenazas en las ciudades. Ante ello el gobierno colombiano ha expresado su preocupación a través de una serie de reformas y leyes

Alexandra Vallejo

176

Characterization and hydrodesulfurization activity of CoMo catalysts supported on boron-doped sol–gel alumina  

Microsoft Academic Search

A series of hydrodesulfurization (HDS) catalysts was prepared by impregnation of Co and Mo on sol–gel B–Al2O3 supports with B\\/Al ratios of 0, 0.02, 0.04, 0.08, 0.20, 0.32, 0.49, and 0.61. The thiophene HDS and dibenzothiophene (DBT) HDS activities were both maximal for the catalyst with B\\/Al=0.04, with respective values 70 and 42% higher than those for an industrial reference

Franck Dumeignil; Koichi Sato; Motoyasu Imamura; Nobuyuki Matsubayashi; Edmond Payen; Hiromichi Shimada

2006-01-01

177

Estadísticas de visitas en portales web institucionales como indicador de respuesta del público a propuestas de divulgación  

NASA Astrophysics Data System (ADS)

The presence of institutions on the internet is nowadays very important to strenghten communication channels, both internal and with the general public. The Córdoba Observatory has several web portals, including the official web page, a blog and presence on several social networks. These are one of the fundamental pillars for outreach activities, and serve as communication channel for events and scientific, academic, and outreach news. They are also a source of information for the staff, as well as data related to the Observatory internal organization and scientific production. Several statistical studies are presented, based on data taken from the visits to the official web pages. I comment on some aspects of the role of web pages as a source of consultation and as a quick response to information needs. FULL TEXT IN SPANISH

Lares, M.

178

Programa Academico de Dominio de Ingles Como Lengua Extranjera (Academic Program in English as a Foreign Language).  

ERIC Educational Resources Information Center

The guide presents the newly-developed curriculum of the Universidad Autonoma Metropolitana at Iztapalapa (Mexico) for its program in English as a foreign language. An introductory section provides background information on the initiative to design a new curriculum. The second section presents the principles on which the curriculum and its methods…

Flores Revilla, Maria Teresa; Zoreda, Margaret Lee; Vivaldo Lima, Javier; Blanco Lopez, Guadalupe; Caballero Robles, Teresita del Rosario; Mercau Appiani, Virginia

179

La ecología espacial como punto de encuentro entre la ecología animal y vegetal. Modelos espacialmente explícitos de dispersión endozoócora  

Microsoft Academic Search

Spatial ecology as a crossroad for animal and plant ecology. An example using spatially explicit models of endozoochorou s seed dispersal. In this article, we use seed-dispersal systems to exemplify the importance of spatial ecology for the study of plant -animal interactions. The study of seed-dispersal systems has been traditionally biased towards their plant component, with a relative disregard for

L. Santamaría; A. R. Larrinaga; A. Arceiz; J. Rodríguez Pérez

180

Análise da adaptabilidade e da estabilidade de genótipos de trigo como ferramenta auxiliar na recomendação de novas cultivares  

Microsoft Academic Search

The analysis of adaptability and stability of wheat genotypes helps the plant breeder in the recommendation of new cultivars, recommending lines of broad or specific adaptation to environments. This procedure is particularly important in wheat cropping, mainly when the great diversity of environments to which this cereal is submitted in Brazil is taken into consideration. Thus, the objective of this

Eduardo Caierão; Márcio Só e Silva; Pedro Luiz Scheeren; Leo de Jesus Antunes Del Duca; Alfredo do Nascimento Junior; João Leonardo Pires

2006-01-01

181

Comparative Studies on Biochemical Properties of Protein Synthesis of an Archae-Bacteria Thermoplasma-Sp  

NASA Astrophysics Data System (ADS)

An acido-thermophillic archaebacteria,Thermoplasma strain KO-2, produced poly(A) containing RNA. The isolated poly(A)RNA showed the messenger activity in a cell-free extract of rabbit reticulocyte, indicating that the RNA is mRNA of the archaebacteria. 7-Methylgluanosine 5'-phosphate did not inhibit the reaction, suggesting that the cap structure is not present in the messenger. These results may suggest that poly(A) containing messenger arised at very early stage of evolution prior to the divergence between archaebacteria and eukaryotes.

Ohba, Masayuki; Oshima, Tairo

1982-12-01

182

A ARBITRAGEM COMO FORMA DE RESOLUÇÃO DE CONFLITOS ENTRE OS USUÁRIOS DO SECOND LIFE. ARBITRATION AS A MEANS OF RESOLVING CONFLICTS BETWEEN USERS OF SECOND L IFE  

Microsoft Academic Search

This article intends to register an analysis of the virtual environm ent of Second Life, for the forms of conflict resolution. But the idea is to start a discussion in the face of virtual environments that are emerging about virtual well, applicability of law in the face of questions concerning the network. Despite no longer mention the proportionality of the

Karla Cristina da Costa; Silva Matos Ferragi

183

ELUDING THE DEMON - HOW EXTREME PHYSICAL INFORMATION APPLIES TO SEMIOSIS AND COMMUNICATION ILUDINDO O DEMÔNIO - COMO A INFORMAÇÃO FÍSICA EXTREMADA SE APLICA À SEMIOSE E À COMUNICAÇÃO  

Microsoft Academic Search

C.S. Peirce states that a sign represents only some aspect of an object, which means that no representation can be perfect. The form - or information - grounding the sign's ability to represent its object is always deficient in some measure. If we take the difference between the form of the object and the form represented in the sign to

B. Roy Frieden; Vinicius Romanini

184

LA COMBINACIÓN DEL USO LIBRE DE ASOCIACIONES Y LA ESTRATEGIA 'KEYWORDS' EN EL APRENDIZAJE DE VOCABULARIO DE INGLÉS COMO LENGUA EXTRANJERA  

Microsoft Academic Search

This research project studies the effectiveness of a programme of applica- tion of vocabulary learning strategies of English as a foreign language in Secon- dary Education. The combination of Association\\/Elaboration and Keywords is examined when it is used by an experimental group (N=23) against a control group (N=18) with strategic freedom. The programme is beneficial for the low performance group

MIGUEL GARCÍA LÓPEZ

2005-01-01

185

Abordagem do tema hipertensão arterial e suas relações com o tabagismo e a obesidade como forma de avaliação da aquisição e socialização de conhecimentos em Feiras de Ciências  

Microsoft Academic Search

O presente trabalho apresenta a experiência vivenciada por um professor do Ensino Fundamental de Escola Pública do Paraná, na orientação de uma equipe de alunos de 8ª série, em 2008, visando o desenvolvimento de trabalhos em Feiras de Ciências. A temática da equipe enfoca a hipertensão arterial e seus fatores de risco, tabagismo e obesidade, no município de Floresta. Escolheu-se

Eduardo de Almeida Grenier; Celso Ivam Conegero

2008-01-01

186

PHYTOLITHS AS INDICATORS OF PALEOSOLS AND GRASSLAND VEGETATION IN THE TEOTIHUACAN VALLEY, MEXICO FITOLITOS COMO INDICADORES DE PALEOSUELOS Y VEGETACIÓN DE PASTIZAL DEL VALLE DE TEOTIHUACAN, MÉXICO  

Microsoft Academic Search

Phytoliths recovered from pedological profiles in the Teotihuacan Valley, Mexico, as part of a paleoenvironmenal study of the region, are indicators of paleosols as well as fluctuations in the spatial distribution of soils and vegetation through time. In this analysis, grass (Poaceae) phytoliths represented by the subfamilies Pooideae, Panicoideae and Chloridoideae, are considered. A two-stage study included a cross-valley sampling

McClung de Tapia; Héctor Cabadas-Báez; Ernestina Vallejo-Gómez; Jorge Gama-Castro

187

O Brincar como uma Acao Mediadora no Trabalho Desenvolvido com Criancas Hospitalizadas (Play as a Mediating Activity in Work Developed with Hospitalized Children).  

ERIC Educational Resources Information Center

Describes experiences with hospitalized children through the extension project "Writing and Reading at the University Hospital", State University of Maringa Hospital (Brazil). States the initial project proposal provided educational assistance to the children separated from school due to being in the hospital. Used play and games as an effective…

Goulart, Aurea Maria Paes Leme; de Moraes, Silvia Pereira Gonzaga

2000-01-01

188

Como Lo Hago Yo: Anomal?as del Tubo Neural en Guatemala -- Mielomeningocele Unidad de Espina B?fida e Hidrocefalia  

PubMed Central

En Guatemala nacen por añ 786 niños con defectos de tubo neural. Operamos 65 a 70 niños con mielomenigocele por año. Tenemos equipo multidisciplinario. Recomendamos parto por cesárea. Infección antes de la cirugía es un problema mayor. Derivación tardía es un problema. Disecamos la plaqueta con la técnica clásica. Suturamos la plaqueta para restituir la forma de la médula. Corpectomía en casos de cifósis. Hidrocefalía: Operamos el 80% de los niños. Chiari II: Operamos basados en los síntomas, primero nos aseguramos que la válvula funciona bien. Médula anclada: Operamos basados en los síntomas.

Manucci, Graciela; von Quednow, Enzo

2014-01-01

189

Structural and kinetic study of CoMo/. gamma. Al/sub 2/O/sub 3/ hydrodesulfurization catalyst using EXAFS and XANES  

SciTech Connect

In situ Extended X-ray Absorption Fine Structure (EXAFS) and X-ray Absorption Near Edge (XANES) spectroscopies were combined in a study designed to elucidate the molecular structure of molybdenum in CoMo/..gamma..Al/sub 2/O/sub 3/ hydrodesulfurization catalysts. This structure was related to catalytic activity using a model thiophene hydrodesulfurization reaction. Oxide CoMo/..gamma..Al/sub 2/O/sub 3/ was found to consist of tetrahedrally coordinated molybdenum with two or three short Mo = O bonds and one or two oxide ligands with longer Mo-O distances. The catalyst reacts with H/sub 2/S at 25 C with terminal Mo = O species being replaced by sulfur ligands. As the sulfiding temperature is increased, oxysulfides are replaced with a MoS/sub 2/-like phase. No evidence was found of oxysulfides at sulfiding temperatures in excess of 200 C. The first shell sulfur and second shell molybdenum coordination numbers were observed to increase linearly with sulfiding temperature, as was the present MoS/sub 2/-like phase. The MoS/sub 2/-like phase is remarkably similar to MoS/sub 2/, but has a Mo-S coordination number of only four. The second shell coordination is also lower, with only three molybdenum neighbors at 3.16 A. Sulfiding is about 90% complete after two hours at 400 C, with only minor change after 24 hours of sulfiding. This information is consistent with a structural model consisting of small MoS/sub 2/ crystallites of c.a. 10 A if the perimeter molybdenums are considered to have lost labile sulfur. Kinetic EXAFS, XANES and sulfur uptake measurements were made in situ during catalyst sulfiding and HDS. These measurements showed that at high temperature (400 C) the rate of sulfur adsorption onto the catalyst limits the rate of reaction between surface sulfur and molybdenum.

Parham, T.G.

1983-01-01

190

A Mo-K edge XAFS study of the metal sulfide-support interaction in (Co)Mo supported alumina and titania catalysts  

SciTech Connect

The metal-support interaction in oxidic and sulfided (Co)Mo/Al{sub 2}O{sub 3} and (Co)Mo/TiO{sub 2} catalysts has been studied with X-ray absorption spectroscopy. Analysis of the oxidic catalysts showed that on both Mo/Al{sub 2}O{sub 3} and Mo/TiO{sub 2} the molybdenum oxide particles possess a highly distorted octahedral structure with Mo-O distances ranging from 1.71 {Angstrom} to 1.94 {Angstrom}. The second shell Mo-Mo coordination number of less than 1.0 indicated that the size of the molybdenum oxide particles is very small. Upon addition of Co the particle size is increased to approximately four Mo atoms per particle. EXAFS data analysis showed the presence of second shell Al and Ti neighbours indicating a linkage of the molybdenum oxide particles to the support via Mo-O-X (X = Al or Ti) bonds. Upon sulfidation of the oxidic catalysts small MOS{sub 2} particles are formed with second shell Mo-Mo coordination numbers ranging from 0.8 to 3.9. {Angstrom} Mo-O contribution at 2.0 {Angstrom} was found in the first coordination shell of Mo in the sulfided catalysts. Since the coordination number of this Mo-O contribution correlated with the MOS{sub 2} particle size, deduced from the second shell Mo-Mo coordination number, this Mo-O contribution was assigned as an interfacial Mo-O{sub support} linkage. This Mo-O{sub support} linkage stabilizes; the small MOS{sub 2} particles and prevents them from sintering. It is proposed that the activity of these catalysts can be controlled by optimising the molybdenum sulfide-support interaction, which consists of the observed MO-O{sub support} bonds. 56 refs., 11 figs., 6 tabs.

Leliveld, R.G.; Dillen, A.J. van; Geus, J.W.; Koningsberger, D.C. [Univ. of Utrecht (Netherlands)] [Univ. of Utrecht (Netherlands)

1997-01-15

191

PROPUEST A METODOLÓGICA PARA PRIORIZAR ÁREAS CON AMENAZA POR CAÍDA DE ROCAS EN ENTORNOS URBANOS, COMO BASE PARA EL REORDENAMIENT O URBANO Y LA MITIGACIÓN DEL RIESGO  

Microsoft Academic Search

This paper describes a qualitative methodology for the assessment of rock fall physical risk index at large-scale (1:1000). Through a detailed geologic and geomorphological survey both rock fall deposits and rock fall sources are identified and mapped. Analysis of the rock fall deposits give indications over the temporal frequency and spatial distribution of the phenomenon and point out the most

Medio Ambiente; R. D. V Geoconsulting

192

Approvechamiento de Desechos para la Generacion de Bio-Gas como Fuente de Energia (Utilization of Residues for the Obtention of Bio-Gas as an Energy Source).  

National Technical Information Service (NTIS)

This report explains the production of methane gas by the process of anaerobic fermentation, from organic sources such as poultry or cow manure. Analyzes the inconveniences at the present of using human excreta. Other sources are: food waste, mud, vegetab...

J. C. Gonzalez B L. A. Munoz V

1978-01-01

193

Simulacion de Temblores como Procesos Estocasticos No Estacionarios (Simulation of Accelerograms as Sample Functions of a Non-Stationary Stochastic Process).  

National Technical Information Service (NTIS)

A procedure for the simulation of accelerograms as sample functions of a non-stationary stochastic process is presented. The frequency content and the amplitude of motion are both considered as evolutionary. The spectral density of the acceleration is rep...

S. Ruiz A. Arias H. Sandoval

1981-01-01

194

EVALUACIÓN DE PARÁMETROS BIOQUIMICOS Y MORFOGENETICOS EN LA SIMBIOSIS Azolla filiculoides - Anabaena azollae COMO RESPUESTA A LA INTERACCIÓN DE LA CALIDAD DE LUZ Y DOS NIVELES DE NITRÓGENO  

Microsoft Academic Search

The objective of the present study was to investigate the interaction between three light qualities (red, white and blue) and two nitrogen levels (IRRI +N and IRRI -N) on the simbiosis Azolla filiculoides - Anabaena azollae through the evaluation of parameters such as: Growth rate of vegetative cells and heterocists, chlorophyll, protein and proline contents and the nitrogenase and nitrate

Javier Mosquera Lenti; Abelardo Calderón Rodriguez

195

A fauna de Rotallida (Foraminiferida) da borda do recife de Itacimirim, Bahia, Brasil: um estudo comparativo do sedimento e das algas como substrato  

Microsoft Academic Search

This study aimed to compare the Rotaliida fauna (Foraminiferida) that lives in the sediment with that attached on algae from the Itacimirim's reef border, Bahia's north coast. Six samples of sediment and six of algae were collected in sites distributed along the reef border. The first 200 foraminnifers of each sample were selected, identified and the specimens belonging to the

Yonara S. Braga; Altair J. Machado; Simone S. Moraes

2008-01-01

196

Surface Chemistry of Model Co-Mo Catalysts Supported on Planar gamma -Al sub 2 O sub 3 . Annual Technical Progress Report, September 1, 1985-August 31, 1986.  

National Technical Information Service (NTIS)

During the first year major effort was devoted to the building new equipment, modifying the existing equipment and training of the graduate students for the UHV analytical techniques. Meantime some experimental work was also done. The first task, the plan...

T. Sahin W. K. Ford

1986-01-01

197

Antecedentes y presencia de trastornos depresivos como factor de riesgo de ingreso hospitalario en pacientes mayores de 74 años atendidos en un servicio de urgencias  

Microsoft Academic Search

IntroductionDepression is especially frequent in the elderly. In addition to impairing quality of life, this disorder can affect the outcome of medical diseases. The objective is to analyze whether depressive disorders in elderly individuals attending an emergency room for medical complaints constitute a risk factor for admission.

Mónica Suárez-Linares; Jesús Vicente Cobo-Gómez; Francisco Manuel Suárez-García; Elena García-Carreño; Antonio Álvarez-Álvarez

2009-01-01

198

O desenvolvimento compartilhado de impressos como estratégia de educação em saúde junto a trabalhadores de escolas da rede pública do Estado do Rio de Janeiro  

Microsoft Academic Search

This article describes the process and results of an experience with preparing a mural entitled A Day in the Life of the School Lunch Cook, conducted with public school employees in the State of Rio de Janeiro by a team of researchers and students from the Specialization Course in Workers' Health at the Center for Studies on Workers' Health of

Kátia Reis de Souza; Brani Rozemberg; Adriana Kelly-Santos; Nancy Yasuda; Marta Sharapin

2003-01-01

199

Las pasantías del docente de ciencias como estrategia de formación y desarrollo profesional The stage of science teachers as strategies of formation and professional development  

Microsoft Academic Search

This text analises the science teachers comprehention process dealing with the nature and scientific practices from a cooperation model between researches and sciencies teachers. This project is organized by the UNESCO Montevi- deo education, PEDECIBA (development program of basic science) and Admnistra- tion National Education of the Republic Uruguay.

MARÍA PAZ ECHEVERRIARZA; ALCIRA RIVAROSA

2006-01-01

200

A música como experiência e diferencial mercadológico no turismo: um estudo de caso sobre o trecho Serro a São Gonçalo do Rio Preto - Estrada Real - MG  

Microsoft Academic Search

The search for places, which provide meaningful and unique experiences, is increasing in the tourism activity, and consequently, it is necessary to change the marketing strategy in places and attractions. The musical expression of Minas Gerais is not promoted as cultural contrast, although it is a great tourist attraction. This article suggests the use of the experimental marketing and the

Mariana Helena; Diniz Ferreira; Mileno Dias Marquezini

201

How To Talk to Your Teens and Children about AIDS = Como hablar con sus adolescentes y sus ninos sobre el SIDA.  

ERIC Educational Resources Information Center

Two brochures, one in English and one in Spanish, provide parents with basic information that will enable them to educate their children about Acquired Immune Deficiency Syndrome (AIDS). Contents address 11 questions: (1) What is AIDS? (2) How do you get AIDS? (3) How is AIDS not spread? (4) Who can get AIDS? (5) How can you tell if someone has…

National PTA, Chicago, IL.

202

O processo de aquisicao das vogais semi-abertas "e,""o" portuges (brasileiro) como lingua estrangeira (Vowels "e" and "o" in Brazilian Portuguese as a Foreign Language).  

ERIC Educational Resources Information Center

Study looks at whether Spanish-speaking learners of Brazilian Portuguese as a foreign language demonstrates advantage or disadvantage in acquisition of semi-open vowels e and o. To research the question, eight students enrolled in first-year Portuguese were given a listening discrimination test composed of 18 minimal pairs to determine the extent…

Simoes, Antonio R. M.; Kelm, Orlando R.

1991-01-01

203

Análise de Componentes Principais em Imagens Multitemporais TM\\/Landsat como Subsídio aos Estudos de Vulnerabilidade à Perda de Solo em Ambiente Semi-Árido  

Microsoft Academic Search

This study shows a methodological approach to evaluate soil losses and environmental vulnerability of the semi-arid regime on the northeast of Brazil. In order to perform this work Landsat\\/TM bands (red and infrared), from distinct hydrological periods were used by PCA (Principal Component Analysis).The results obtained indicate different features of the land use changes, that were categorized on three landscape

Alessandra Rodrigues Gomes; Francisco Dario Maldonado

1998-01-01

204

Cidadania Negada: A Educacao como Instrumento de Combate a Pobreza no Brasil (Denial of Citizenship: Education as a Way to Fight Poverty in Brazil).  

ERIC Educational Resources Information Center

Compares two compensatory social/educational programs developed by the Brazilian government in the last 15 years. States that although one was formulated during the military regime and one during the present government, they both combat poverty and encourage privatization. Concludes that this promotes a process that sees education as social…

Germano, Jose Willington

1995-01-01

205

EFICIÊNCIA DE PRODUTOS À BASE DE CLORO COMO AGENTES LETAIS DE Aede aegypti (DIPTERA, CULICIDAE) DÉBORA GUIMARÃES LIMA CARNEIRO 1 & CARLOS FERNANDO SALGUEIROSA DE ANDRADE 2  

Microsoft Academic Search

The present paper deals with the evaluation of the effectiveness of a sample of Sodium dichloroisocyanurate compared with the usual pool c hlorine, calcium hypochlorite, on the mortality of Aedes aegypti larvae, vector of dengue. Laboratory bioassays wer e carried out with the concentrations of 0.6 ppm of Sodium dichloroisocyanurate and 1ppm of swimming pool chlorine, as representing its common

Edmilson Ricardo Gonçalves

206

Los Residuos de Cosecha como Estrategia para la Alimentacion de Rumiantes Menores (Crop Residues as a Strategy for Small Ruminant Feeding).  

National Technical Information Service (NTIS)

Crop residues and preharvest foliages are being used for small ruminants in intensive and extensive feeding systems. Optimum use of these materials will depend on knowledge of animal requirements, which vary with breed type and production class, and on nu...

W. L. Johnson

1980-01-01

207

Los ?-agonistas adrenérgicos como modificadores metabólicos y su efecto en la producción, calidad e inocuidad de la carne de bovinos y ovinos: una revisión  

Microsoft Academic Search

Resumen. Los ?-agonistas adrenérgicos (?AA) se han utilizado en la producción animal, incluidos los rumiantes, propiciando una The ?-adrenergic Agonists as Metabolic Modifiers and their Effect on Production, Quality and Innocuousness of Beef Cattle and Sheep Meat: a Review Abstract. The ?-adrenergic agonists (?AA), improve animal production because they manipulate the efficiency of food use, affecting carcass characteristics and the

Ignacio A. Domínguez-Vara; Jaime Mondragón-Ancelmo; Manuel González Ronquillo; Félix Salazar-García; José Luis Bórquez-Gastelum; Andrés Aragón-Martínez

2009-01-01

208

On the effects of calcination conditions on the surface and catalytic properties of ?-Al 2O 3-supported CoMo hydrodesulfurization catalysts  

Microsoft Academic Search

A series of alumina-supported cobalt-molybdenum catalysts were prepared by the incipient-wetness method. Different calcination temperatures (673–873K) and durations (2–96h) were used to obtain the catalysts. Samples of the catalysts were characterized by X-ray photoelectron spectroscopy (XPS). Depending on the calcination condition, two forms of molybdenum (Mo4+ and Mo6+) and sulfur (S1 and S2) were identified. The ratio of Mo4+\\/Mo6+ appeared

Y. S. Al-Zeghayer; B. Y. Jibril

2005-01-01

209

Creacion de un programa de ensenanza de espanol como segunda lengua para ninos de edad prescolar (Creating a Spanish as a Second Language Program for Preschool Children).  

ERIC Educational Resources Information Center

Presents suggestions for planning a Spanish as a second language program for preschool children. The rationale and means of implementing the program are considered, and guidelines for teaching vocabulary are discussed. A variety of classroom activities are also presented. (TR)

Rosenbusch, Marcia H.

1987-01-01

210

Commercial scale expanded bed hydroprocessing of Solvent Refined Coal (SRC) extract. October monthly technical progress report. [Ni\\/Mo, Co\\/Mo, Ni\\/W  

Microsoft Academic Search

Catalyst screening runs of two additional commercially available desulfurization\\/denitrogenation catalysts (Ni\\/Mo-B and Ni\\/Mo-C) have been completed. A total of three nickel-molybdenum, two cobalt-molybdenum, and one nickel-tungsten catalyst was included in the catalyst screening program. Within the constraints of the 10-day maximum run duration for individual catalyst screening runs, the nickel-molybdenum catalyst (Ni\\/Mo-A) was the best catalyst tested to date for

1977-01-01

211

Além da Informalidade: Entendendo como os Fiscais e Agentes de Desenvolvimento Promovem a Formalização o Crescimento de Pequenas e Médias Empresas  

Microsoft Academic Search

Na maioria dos países em desenvolvimento, o número de pequenas e médias empresas (PMEs) no setor informal tem crescido continuamente na última década em conseqüência do excesso de regulação e da crescente concorrência internacional. Hoje, nesses locais, o grande desafio para formuladores de políticas e agentes de desenvolvimento é conciliar o crescimento econômico com as normas legais. Por um lado,

Mansueto Almeida

2008-01-01

212

Arejamento Como Medida de Proteccao Contra a Erosao de Cavitacao em Obras Hidraulicas (Aeration to Prevent Cavitation Erosion in Hydraulic Structures).  

National Technical Information Service (NTIS)

The aim of the work is the study of the flow aeration in order to prevent caviation erosion in hydraulic structures. Due to the relevance of the caviation phenomenon within the scope of the present work, a brief description of the physical process is pres...

J. de Saldanha Goncalves Matos

1990-01-01

213

Tips for Parents on Keeping Children Drug Free = Consejos para Los Padres Sobre Como Mantener a Los Hijos Libres de La Droga.  

ERIC Educational Resources Information Center

Research shows that recent trends in youth drug use have stabilized; however, the rates of use remain at high levels. It has been shown that the earlier drug use is initiated, the more likely a person is to develop drug problems later in life. Youth substance abuse may lead to many other problems that affect not only the child, but also the…

Department of Education, Washington, DC. Office of Intergovernmental and Interagency Affairs.

214

O planejamento estrategico como insumo da qualidade em empresas de energia eletrica. (The strategical planning as quality intake in electric power utilities).  

National Technical Information Service (NTIS)

A methodology for a strategical plan elaboration aiming the electric power distribution sector is shown, including the following steps: thr company business; company goal; environmental analysis; definition of the company behaviour principles, guidelines,...

A. Silva Filho M. L. R. Cordeiro

1992-01-01

215

Communicacion Expresiva: Como los ninos nos envian mensajes [and] Comunicacion Receptiva: Como los ninos entienden nuestros mensajes [and] Interacciones de Comunicacion: Hacen falta dos. Hojas informativa de DB-LINK (Communication Interactions: It Takes Two [and] Receptive Communication: How Children Understand Your Messages to Them [and] Expressive Communication: How Children Send Their Messages to You. DB-LINK Fact Sheets).  

ERIC Educational Resources Information Center

This document consists of three separately published fact sheets combined here because of the close relationship of their subject matter. The first fact sheet, "Communication Interactions: It Takes Two" (Kathleen Stremel), defines communication; suggests ways to find opportunities for interactive communication; offers specific suggestions for…

Stremel, Kathleen

216

EL CUIDADO DE SÍ DE LA EMBARAZADA DIABÉTICA COMO UNA VIA PARA ASEGURAR UN HIJO SANO SELF-CARE OF DIABETIC PREGNANT WOMEN, A WAY OF ENSURING A HEALTHY BABY O CUIDADO DE SI DE GESTANTES DIABÉTICAS COMO UM CAMINHO PARA ASSEGURAR UM FILHO SAUDÁVEL  

Microsoft Academic Search

This focused ethnography explored the beliefs, values, habits and behavioral patterns of diabetic pregnant women who were treated in Hospital Doutor Enrique Tejera, residents of three poor, urban communities in the city of Valencia, Venezuela. The purpose of this study was to find the meaning of self-care for these pregnant women. The Health Analysis, the Theory of Diversity, and the

Carmen Amarilis; Guerra de Castillo; Marta Lucía Vásquez

2006-01-01

217

A Redox Fuel Cell That Operates with Methane as Fuel at 120{degrees}C.  

PubMed

Platinum black efficiently catalyzes the oxidation of methane by iron(III) to generate carbon dioxide and eight equivalents of iron(II) in solutions of sulfuric acid in water. The rate of oxidation increases over 4 hours to reach approximately 4.83 x 10(-2) moles of iron(II) per gram atom of surface platinum per second. A redox fuel cell was assembled that used this reaction in a liquid reformer to generate soluble reducing equivalents of iron(II) from methane, which was electrochemically oxidized to iron(III) in the cell. A vanadium(V)-(IV)-nitric acid-O(2) redox system catalyzed the electrochemical reduction of O(2). The open-circuit voltage of the cell was 0.48 volt, and the maximum power output of the cell was 8.1 milliwatts per cubic centimeter of graphite felt electrode. PMID:17833814

Bergens, S H; Gorman, C B; Palmore, G T; Whitesides, G M

1994-09-01

218

Redox fuel cell that operates with methane as fuel at 120 C  

NASA Astrophysics Data System (ADS)

Platinum black efficiently catalyzes the oxidation of methane by iron(III) to generate carbon dioxide and eight equivalents of iron(II) in solutions of sulfuric acid in water. The rate of oxidation increases over 4 hours to reach approximately 4.83 x 10(exp -2) moles of iron(II) per gram atom of surface platinum per second. A redox fuel cell was assembled that used this reaction in a liquid reformer to generate soluble reducing equivalents of iron(II) from methane, which was electrochemically oxidized to iron(III) in the cell. A vanadium(V)-(IV)-nitric acid-O2 redox system catalyzed the electrochemical reduction of O2. The open-circuit voltage of the cell was 0.48 volt, and the maximum power output of the cell was 8.1 milliwatts per cubic centimeter of graphite felt electrode.

Bergens, Steven H.; Gorman, Christopher B.; Tayhas, G.; Palmore, R.; Whitesides, George M.

1994-09-01

219

Study of the chemical mechanisms of the reaction of neutralization of calcium hydroxide by phosphoric acid  

NASA Astrophysics Data System (ADS)

Calcium phosphates reported in this study, are prepared following an acido-basic reaction between phosphoric acid and calcium hydroxide. These phosphates are the brushite, tricalcium phosphate, hydroxyapatite and oxygenated apatite. The follow-up of the reaction by infra-red spectroscopy of absorption showed that the alkaline pH of calcium hydroxide solution, favours the formation of carbonated apatite, at the start of the reaction. Following the addition of phosphoric acid, the pH becomes increasingly favourable to the formation of the desired phase. The insertion of molecular oxygen in the apatitic tunnel is carried out by the use of hydrogen peroxide. The molecular oxygen rate in the apatite is then determined by volumetric analysis.

Elgadi, M.; Mejdoubi, E.; Elansari, L. L.; Essaddek, A.; Abouricha, S.; Lamhamdi, A.

2005-03-01

220

Investigation by infrared absorption spectroscopy into the chemical mechanisms of the wet process synthesis of some calcium phosphates  

NASA Astrophysics Data System (ADS)

The present work describes the reactions of wet process synthesis, of some calcium phosphates, such as tricalcium phosphate (Ca{3}(PO{4})2) and hydroxyapatite (Ca{10}(PO{4})6(OH){2}). These reactions of synthesis are acido-basic reactions between the phosphoric acid (H{3}PO{4}) and calcium carbonates (CaCO{3}).The evolution of these reactions (and the concerned chemical mechanisms) were followed by mid infrared spectroscopy absorption. Indeed, in the first stage of these three reactions in which the medium is strongly acidic, favours the formation of a stable intermediate compound, which is the brushite.During the reaction, the concentration of phosphoric acid decreases, the pH increases and the brushite becomes unstable, thus it evolves to a more stable calcium phosphate under these new pH conditions. This later product was either the tricalcium phosphate or hydroxyapatite, according to the pH solution.

Essaddek, A.; Elgadi, M.; Mejdoubi, E.; Elansari, L. L.; Moradi, K.; Karroua, M.

2005-03-01

221

What Makes a Good Teacher? Children Speak Their Minds=Qu'est-ce qu'un bon maitre? Les enfants ouvrent leur coeur=Como debe ser un buen maestro? Los ninos opinan.  

ERIC Educational Resources Information Center

This booklet is a product of the UNESCO Associated Schools Project, a network of some 3,800 schools in 131 countries, which conducts pilot projects to promote education for peace, international understanding, and cooperation. Schools taking part in the project participated in an international contest asking for spontaneous reactions to the…

Khawajkie, Elizabeth, Ed.; And Others

222

Como ayudar a su hijo a ser un buen lector: Con actividades para los ninos desde el nacimiento hasta los 6 anos (Helping Your Child Become a Reader: With Activities for Children from Infancy through Age 6).  

ERIC Educational Resources Information Center

When parents and other family members read with their children, help them with homework, talk with their teachers, and participate in school or other learning activities, they give their children a tremendous advantage. The foundation for learning to read is in place long before children enter school and begin formal reading instruction. Families…

Lehr, Fran; Osborn, Jean

223

Aplicacion de tecnicas de fosfatacion sobre acero al carbon y aluminio, utilizando como agente oxidante la nitroguanidina. (Application of phosphating techniques to aluminium and carbon steel surfaces using nitro guanidine as oxidizing agent.).  

National Technical Information Service (NTIS)

Phosphate coatings are inorganic crystalline deposits laid down uniformly on properly prepared surfaces by a chemical reaction with the treated base metal. The reaction consists in dissolving some surface metal by acid attack and then causing surface neut...

S. A. Briseno

1995-01-01

224

A utilização da segmentação de imagens-fração como técnica de classificação da cobertura vegetal na região central e entorno da FLONA do Tapajós, utilizando imagem CCD\\/CBERS-2  

Microsoft Academic Search

This work has as main objective the mapping of the vegetable covering in the central area and around of the Tapajós National Forest, located to the south of the city of Santarém-Pará, Brazil. For this purpose, over the 2005 image of sensor CCD\\/CBERS-2 the following digital processings were accomplished: a linear spectral mixture model; segmentation and classification. The application of

Igor da Silva Narvaes; Roberto dos Santos

225

Como Promover el Exito de las Ninas y las Minorias en las Ciencias y en las Matematicas. Para Padres/sobre Padres (How To Promote the Science and Mathematics Achievement of Females and Minorities. For Parents/about Parents).  

ERIC Educational Resources Information Center

Some minority and female students traditionally have not been given the help they need to enroll and succeed in mathematics and science classes. Now, however, various approaches are available to give these students the extra attention they need. Parents can help children develop an interest in science and mathematics by: (1) identifying role…

Schwartz, Wendy

226

Nota científica COMPUESTOS DERIVADOS DE AJO COMO AGENTES INDUCTORES DE BROTACIÓN EN CULTIVO ORGÁNICO DE UVA DE MESA Compounds derived from garlic as bud induction agents in organic farming of table grape  

Microsoft Academic Search

Viticulture is one of the most important economic activities in the Northwest of Mexico. A major obstacle for the economic production is the insufficient period of chilling temperatures. This problem leads to poor budbreak, which results in reduced yields. This problem is aggravated when plants are cultivated using the organic farming system, mostly because there are not organically approved restbreaking

Irasema Vargas-Arispuro; Consuelo Corrales-Maldonado

227

Surface Chemistry of Model Co-Mo Catalysts Supported on Planar G-Al/sub 2/O/sub 3/: Quarterly Technical Progress Report for Period March 1, 1987 to May 31, 1987.  

National Technical Information Service (NTIS)

Five samples were prepared and characterized by XPS in calcined, reduced and sulfided states. These catalysts will be used to study the adsorption characteristics of thiophene and cyclohexene in the SIMS/TPD chamber. We have done some preliminary TPD expe...

T. Sahin W. K. Ford

1987-01-01

228

La lectura literaria como arte de "performance": la teoria transaccional de Louise Rosenblatt y sus implicaciones pedagogicas (The Use of Literature as Performance Art: The Transactional Theory of Louise Rosenblatt and Its Pedagogical Implications).  

ERIC Educational Resources Information Center

This paper focuses on the work that Louise Rosenblatt and her followers in the United States have done to improve the teaching and learning of literature at all educational levels. Although these researchers have focused almost exclusively on the use of literature in the native language, the paper uses transactional theory as a basis for teaching…

Zoreda, Margaret Lee

229

O Imperio como Argumento: Um Contraponto entre Joaquim Nabuco e o Bispo D. Jose Mauricio da Rocha (The Empire as Argument: A Counterpoint between Joaquim Nabuco and the Bishop Dom Jose Mauricio da Rocha).  

ERIC Educational Resources Information Center

Dialogs with the previous article establishing a comparative analysis between the political acceptance present in the reactionary speech of Dom Jose Mauricio da Rocha and in the monarchist words of Joaquim Nabuco. (PA)

Marson, Izabel Andrade

1998-01-01

230

El compostaje como tecnologia para el tratamiento de residuos: compostaje de bagazo de sorgo dulce con diferentes fuentes nitrogenadas. (Composting as a waste treatment technology: composting of sweet sorghum bagasse with different nitrogen sources).  

National Technical Information Service (NTIS)

The purpose of this work is to study aerobic solid fermentation of sweet sorghum bagasse in mixture with other additives as nitrogen sources to evaluate the utilization of this material as a substrate for composting. The characteristics of sweet sorghum b...

J. Vicente J. E. Carrasco M. J. Negro

1996-01-01

231

La Migracion Como Una Transicion Critica para la Persona en Su Ambiente. Una Interpretacion Organismico Evolutiva. (Migration as a Critical Person-in-Environment Transition: An Organismic-Developmental Interpretation.)  

ERIC Educational Resources Information Center

In order to explore some of the changes and stresses connected with migration and return migration, a study was conducted among migrants returning from the United States mainland to Puerto Rico. The sample consisted of 75 adolescents participating in a Bilingual Education program in Puerto Rico. Data were collected using Psychological Distance…

Pacheco, Angel M.; And Others

232

THE ANALYTIC HIERARQUICAL PROCESS (AHP) AS A DECISION MAKING TOOL IN THE OPORTUNITY ANALYSIS OF CORPORATE REAL ESTATE INVESTMENT USO DA FERRAMENTA AHP (ANALYTIC HIERARQUICAL PROCESS) COMO APOIO À DECISÃO NA ANÁLISE DA OPORTUNIDADE DE IMOBILIZAÇÃO EM IMÓVEIS CORPORATIVOS  

Microsoft Academic Search

Due to the increasing of competitiveness in the different sectors of economy, corporations have been changing the way to lead their business in order to generate better performance and results. In this way, continuous reorganizations of the resources used in the operations have been done, and the real estate as well. The decisions about this resource have been better judged,

Carolina Andrea; Garisto Gregório; João da Rocha

233

Aproveitamento do melaço e vinhaça de cana-de-açúcar como substrato para produção de biomassa protéica e lipídica por leveduras e bactéria Use of sugar cane molasses and vinasse for proteic and lipidic biomass production by yeast and bacteria  

Microsoft Academic Search

This work evaluated the lipid and protein growth and synthesis capacity by Saccharomyces cerevisiae, Rhodotoruda mucilaginosa, Candida lipolytica, a yeast isolated from vinasse lakes and Corynebacterium glutamicum in 10% molasses and sugar cane crude vinasse. All microorganisms grew both in molasses and vinasse. The highest growth in crude vinasse was performed by R. mucilaginosa (7.05 g\\/L), and in 10% molasses,

Marcia Luciana Cazetta; Maria Antonia

234

Como Trabajar y Vivir en la Realidad: Pasos Basicos Para Jovenes con Incapacidades, sus Padres y sus Profesores (How to Work and Live in the Real World: Basic Steps for Youth with Handicaps and Their Parents and Teachers).  

ERIC Educational Resources Information Center

This Spanish version of "How to Work and Live in the Real World: Basic Steps for Youth with Handicaps and Their Parents and Teachers" is for young people with handicaps who are getting ready to graduate from high school and begin working and living in the adult world. The booklet places a special focus on individuals with cultural differences. It…

Patton, Patricia L.; And Others

235

Evaluación experimental de rodolitos como sustratos vivos para la infauna en el Banco de Abrolhos, Brasil Experimental evaluation of rhodoliths as living substrata for infauna at the Abrolhos Bank, Brazil  

Microsoft Academic Search

Over large areas of the Brazilian continental shelf, coralline algal rhodoliths provide habitats with high community diversity. In order to understand the role of rhodoliths in structuring the poorly studied infauna of these habitats, we determined seasonal patterns of their size and shape related to the associated biota, and experimentally tested the influence of living substrata in the Abrolhos Archipelago

K Santos de Menezes; EM Costa-Paiva; PC Paiva; CRR Ventura

236

Un estudio de evaluacion educativa manipulativos en el aprendizaje de las matematicas con estudiantes hispanos adquiriendo ingles academico como segunda lengua (A Study of the Use of Manipulatives in the Assessment of Mathematics Instruction with ESL Hispanic Students).  

ERIC Educational Resources Information Center

As an alternative form of mathematics assessment for use with limited-English-proficient students, 14 mathematics tasks using manipulatives were administered to 45 Hispanic students in grades 1-3 and readministered 2-3 weeks later. Test reliability and validity, task difficulty, and the relationship among test subscales across grades were…

Lara-Alecio, Rafael; Parker, Richard; Aviles, Claudia; Mason, Samantha; Irby, Beverly J.

1998-01-01

237

Introversion/Extroversion & Teachers' Perception on Dominican EFL College Students' Performance = La Introversion/Extroversion vs. La Percepcion Profesoral en el Desempeno de Estudiantes Universitarios Dominicanos de Ingles como Lengua Extranjera  

ERIC Educational Resources Information Center

This article discusses the relationship between introversion/extroversion and a student's performance (academic achievement) as perceived by Teachers of English as a Foreign Language in three regional centers of the Universidad Autonoma de Santo Domingo. There have been a great number of international studies already published to try to explain…

Tavarez Da Costa, Pedro

2012-01-01

238

MADERA PRESERVADA DE ALAMO (Populus Linn.) COMO MATERIAL DE CONSTRUCCION RESISTENTE AL ATAQUE DE HONGOS E INSECTOS ALAMO (Populus Linn.) PRESERVED WOOD FOR USE AS A STRUCTURAL AND FRAMING TIMBER, RESISTANT TO MUSHROOMS AND INSECTS ATTACK  

Microsoft Academic Search

Windbreaks now occupies around 500 hectares in Santa Cruz province (ARGENTINA). Populus nigra is the most common specie for the purposes of sheltering plantations and livestock by wind. Wood treated with certain preservatives provide high quality material, primarily suited for use as a structural and framing timber. The responses of two poplars woods origins was evaluated. Test of available CCA-C

EEA Santa Cruz

239

Como ayudar a su hijo durante los primeros anos de la adolescencia: Para los padres con ninos entre las edades de 10 a 14 anos (Helping Your Child through Early Adolescence: For Parents of Children from 10 through 14).  

ERIC Educational Resources Information Center

Recognizing that parents and families can greatly influence the development of their 10- through 14-year-olds, this Spanish-language booklet is part of a national effort to provide parents with the latest research and practical information to help them support their children both at home and in school. The booklet is organized in 13 sections…

Paulu, Nancy

240

OS RECURSOS DA INFORMÁTICA COMO MEIO PARA EVIDENCIAR OS OBSTÁCULOS EPISTEMOLÓGICOS E MOTIVAR A APRENDIZAGEM DE ONDAS SONORAS THE RESOURCES OF COMPUTER SCIENCE AS HALF TO EVIDENCE EPISTEMOLOGICALS OBSTACLES AND TO MOTIVATE THE LEARNING OF SONOROUS WAVES  

Microsoft Academic Search

This work presents the analysis of data collected during the accomplishment of a field research in that the technologies of the information and communication were used as education resource for the introductory teaching of the Physics of the Sound. The research was carried through in a public school of average education of the city of Campo Grande, in Mato Grosso

Rodrigo Claudino Diogo; Shirley Takeco Gobara

2008-01-01

241

Como Mejorar la Administracion de la Cooperativa: Con Enfasis en el Ambiente Agricola y Hacia el Director (How to Better Manage Agriculture Cooperatives with a Focus on the Director's Role in Management).  

National Technical Information Service (NTIS)

Improving management of farmer cooperatives provides suggestions for improving the administration of the business matters of cooperatives. The importance of the specifics of the legal structure, and quality of administrative or managerial personnel are em...

1970-01-01

242

Adsorption mechanism of acids and bases in reversed-phase liquid chromatography in weak buffered mobile phases designed for liquid chromatography/mass spectrometry.  

PubMed

The overloaded band profiles of five acido-basic compounds were measured, using weakly buffered mobile phases. Low buffer concentrations were selected to provide a better understanding of the band profiles recorded in LC/MS analyses, which are often carried out at low buffer concentrations. In this work, 10 microL samples of a 50 mM probe solution were injected into C(18)-bonded columns using a series of five buffered mobile phases at (SW)pH between 2 and 12. The retention times and the shapes of the bands were analyzed based on thermodynamic arguments. A new adsorption model that takes into account the simultaneous adsorption of the acidic and the basic species onto the endcapped adsorbent, predicts accurately the complex experimental profiles recorded. The adsorption mechanism of acido-basic compounds onto RPLC phases seems to be consistent with the following microscopic model. No matter whether the acid or the base is the neutral or the basic species, the neutral species adsorbs onto a large number of weak adsorption sites (their saturation capacity is several tens g/L and their equilibrium constant of the order of 0.1 L/g). In contrast, the ionic species adsorbs strongly onto fewer active sites (their saturation capacity is about 1g/L and their equilibrium constant of the order of a few L/g). From a microscopic point of view and in agreement with the adsorption isotherm of the compound measured by frontal analysis (FA) and with the results of Monte-Carlo calculations performed by Schure et al., the first type of adsorption sites are most likely located in between C(18)-bonded chains and the second type of adsorption sites are located deeper in contact with the silica surface. The injected concentration (50 mM) was too low to probe the weakest adsorption sites (saturation capacity of a few hundreds g/L with an equilibrium constant of one hundredth of L/g) that are located at the very interface between the C(18)-bonded layer and the bulk phase. PMID:18976999

Gritti, Fabrice; Guiochon, Georges

2009-03-01

243

Adsorption mechanism of acids and bases in reversed-phase liquid chromatography in weak buffered mobile phases designed for liquid chromatography/mass spectrometry  

SciTech Connect

The overloaded band profiles of five acido-basic compounds were measured, using weakly buffered mobile phases. Low buffer concentrations were selected to provide a better understanding of the band profiles recorded in LC/MS analyses, which are often carried out at low buffer concentrations. In this work, 10 {micro}L samples of a 50 mM probe solution were injected into C{sub 18}-bonded columns using a series of five buffered mobile phases at {sub W}{sup S}pH between 2 and 12. The retention times and the shapes of the bands were analyzed based on thermodynamic arguments. A new adsorption model that takes into account the simultaneous adsorption of the acidic and the basic species onto the endcapped adsorbent, predicts accurately the complex experimental profiles recorded. The adsorption mechanism of acido-basic compounds onto RPLC phases seems to be consistent with the following microscopic model. No matter whether the acid or the base is the neutral or the basic species, the neutral species adsorbs onto a large number of weak adsorption sites (their saturation capacity is several tens g/L and their equilibrium constant of the order of 0.1 L/g). In contrast, the ionic species adsorbs strongly onto fewer active sites (their saturation capacity is about 1 g/L and their equilibrium constant of the order of a few L/g). From a microscopic point of view and in agreement with the adsorption isotherm of the compound measured by frontal analysis (FA) and with the results of Monte-Carlo calculations performed by Schure et al., the first type of adsorption sites are most likely located in between C{sub 18}-bonded chains and the second type of adsorption sites are located deeper in contact with the silica surface. The injected concentration (50 mM) was too low to probe the weakest adsorption sites (saturation capacity of a few hundreds g/L with an equilibrium constant of one hundredth of L/g) that are located at the very interface between the C{sub 18}-bonded layer and the bulk phase.

Gritti, Fabrice [University of Tennessee, Knoxville (UTK); Guiochon, Georges A [ORNL

2009-01-01

244

Characterization, cloning, and evolutionary history of the chloroplast and cytosolic class I aldolases of the red alga Galdieria sulphuraria.  

PubMed

Two fructose-1,6-bisphosphate aldolases from the acido- and thermophilic red alga Galdieria sulphuraria were purified to apparent homogeneity and N-terminally microsequenced. Both aldolases had similar biochemical properties such as Km (FBP) (5.6-5.8 microM) and molecular masses of the native enzymes (165kDa) as determined by size exclusion chromatography. The subunit size of the purified aldolases, as determined by SDS-PAGE, was 42kDa for both aldolases. The isoenzymes were not inhibited by EDTA or affected by cysteine or potassium ions, implying that they belong to the class I group of aldolases, while other red algae are known to have one class I and one class II aldolase inhibited by EDTA. cDNA clones of the cytosolic and plastidic aldolases were isolated and sequenced. The gene for the cytosolic isoenzyme contained a 303bp untranslated leader sequence, while the gene for the plastidic isoenzyme exhibited a transit sequence of 56 amino-acid residues. Both isoenzymes showed about 48% homology in the deduced amino-acid sequences. A gene tree relates both aldolases to the basis of early eukaryotic class I aldolases. The phylogenetic relationship to other aldolases, particularly to cyanobacterial class II aldolases, is discussed. PMID:10196468

Gross, W; Lenze, D; Nowitzki, U; Weiske, J; Schnarrenberger, C

1999-04-01

245

Light-induced copper(II) coordination by a bicyclic tetraaza chelator through a ligand-to-metal charge-transfer reaction.  

PubMed

To enable utilization of the broad potential of copper isotopes in nuclear medicine, rapid and robust chelation of the copper is required. Bowl adamanzanes (bicyclic tetraaza ligands) can form kinetically stable copper complexes, but they are usually formed at low rates unless high pH values and high temperatures are applied. We have investigated the effects of the variation in the pH, different anions, and UV irradiation on the chelation rate. UV spectra of mixtures of Cu(2+) and [2(4).3(1)]adz in water show the existence of a long-lived two-coordinated copper(II) intermediate (only counting coordinated amine groups) at pH above 6. These findings are supported by pH titrations of mixtures of Cu(2+) and [2(4).3(1)]adz in water. Irradiation of this complex in the ligand-to-metal charge-transfer (LMCT) band by a diode-array spectrophotometer leads to photodeprotonation and subsequently to formation of the four-coordinated copper(II) complex at a rate up to 7800-fold higher at 25 °C than in the dark. Anions in the solution were found to have three major effects: competitive inhibition due to Cu(II) binding anions, inhibition of the photoinduced transchelation from UV-absorbing anions, and photoredox inhibition from acido ligands capable of acting as electron donors in LMCT reactions. Dissolved O(2) was also found to result in photoredox inhibition. PMID:22074363

Holm-Jørgensen, Jacob R; Jensen, Mikael; Bjerrum, Morten J

2011-12-19

246

Two-way molecular switches with large nonlinear optical contrast.  

PubMed

Molecular switches: Highly efficient acido- and photoswitchable frequency doublers (see scheme) based on the indolinooxazolidine core are studied by means of hyper-Rayleigh experiments and quantum-chemical calculations.To optimize the nonlinear optical (NLO) contrast, a series of indolinooxazolidine derivatives with electron-withdrawing substituents in the para position on the indolinic residue have been synthesized. Their linear and nonlinear optical properties have been characterized by UV-visible absorption and hyper-Rayleigh scattering measurements, as well as by ab initio calculations. The two-way photo- or pH-triggered switching mechanism has been demonstrated by comparing the absorption spectra of the zwitterionic and protonated open forms (POF). Hyper-Rayleigh measurements have revealed that the second-order NLO contrast between the closed indolinooxazolidine and the open pi-conjugated colored forms remain very large upon substitution. Theory and measurements show that for the POFs the amplitude of the first hyperpolarizability follows the Hammett parameters of the withdrawing groups. However, because the measurements are performed in resonance, to recover this behavior, elaborate procedures including homogeneous and inhomogeneous broadenings, as well as single-mode vibronic structures are necessary to extrapolate to the static limit. PMID:19180595

Mançois, Fabien; Pozzo, Jean-Luc; Pan, Jianfeng; Adamietz, Frédéric; Rodriguez, Vincent; Ducasse, Laurent; Castet, Frédéric; Plaquet, Aurélie; Champagne, Benoît

2009-03-01

247

Effect of surface treatments on Li 0.30Ln 0.57TiO 3 (Ln = La, Nd) perovskite ceramics: an X-ray photoelectron spectroscopy study  

NASA Astrophysics Data System (ADS)

To explain the sensitivity of some titanate ceramics to pH variation in aqueous solutions, the lithium lanthanum titanate (LLTO) and lithium neodymium titanate (NLTO) surfaces were analysed by X-ray photoelectron spectroscopy. The surface of LLTO was modified by chemical treatments and sputtering. XPS spectrum of LLTO exhibits the peaks of lanthanum (La 3d 3/2, La 3d 5/2, La 4p, La 4d), titanium (Ti 2p 1/2, Ti 2p 3/2) and oxygen (O 1s). However, the immersion of the ceramic in sodium hydroxide or surface sputtering affect mainly the narrow-scan spectra of oxygen (O 1s). This study reveals that an acido-basic reaction takes place in the neighbourhood of the TiO 6 octahedra of the perovskite. The results also suggest that hydroxyl species may associate with lanthanum. Furthermore, the study on C 1s line rules out the assumption that CO32- species are involved in the pH detection.

Pham, Quoc Nghi; Bohnke, Claude; Bohnke, Odile

2004-11-01

248

Structures of nitrato-(2-hydroxybenzaldehydo) (2,2 Prime -bipyridyl)copper and nitrato-(2-hydroxy-5-nitrobenzaldehydo)(2,2 Prime -bipyridyl)copper  

SciTech Connect

Nitrato-(2-hydroxy-5-nitrobenzaldehydo)(2,2 Prime -bipyridyl)copper (I) and nitrato-(2-hydroxybenzaldehydo)(2,2 Prime -bipyridyl)copper (II) were synthesized and characterized by X-ray diffraction. The coordination polyhedron of the central copper atom in complex I can be described as a distorted tetragonal pyramid whose base is formed by the phenol and carbonyl oxygen atoms of the monodeprotonated 2-hydroxy-5nitrobenzaldehyde molecule and the nitrogen atoms of the 2,2 Prime -bipyridyl ligand and whose apex is occupied by the oxygen atom of the nitrato group. In the crystal structure, complexes I are linked by the acido ligands and the NO{sub 2} groups of the aldehyde molecule into infinite chains. In complex II, the central copper atom is coordinated by 2-hydroxybenzaldehyde, 2,2 Prime -bipyridyl, and the nitrato group, resulting in the formation of centrosymmetric dimers. The coordination polyhedron of the central copper atom can be described as a bipyramid (4 + 1 + 1) with the same base as in complex I. The axial vertices of the bipyramid are occupied by the oxygen atom of the nitrato group and the bridging phenol oxygen atom of the adjacent complex related to the initial complex by a center of symmetry. In the crystal structure, complexes II are hydrogen bonded into infinite chains.

Chumakov, Yu. M. [Academy of Sciences of Moldova, Institute of Applied Physics (Moldova, Republic of); Paladi, L. G. [Moldova State University (Moldova, Republic of); Antosyak, B. Ya.; Simonov, Yu. A. [Academy of Sciences of Moldova, Institute of Applied Physics (Moldova, Republic of); Tsapkov, V. I., E-mail: vtsapkov@gmail.com [Moldova State University (Moldova, Republic of); Bocelli, G. [Institute of Materials for Electronics and Magnetism (Italy); Gulea, A. P. [Moldova State University (Moldova, Republic of); Ginju, D. [Alexandru Ioan Cuza University of Iasi (Romania); Palomares-Sanchez, S. A. [Autonomous University of San Luis Potosi (Mexico)

2011-03-15

249

If Your Child Learns in Two Languages: A Parent's Guide for Improving Educational Opportunities for Children Acquiring English as a Second Language = Si su nino aprende en dos idiomes: Una guia para que las familias sepan como mejorar las oportunidades educativas de los ninos que adquieren el ingles como segunda lengua = Neu lon Ban Hoc Bang Hai Thu Tieng: Chi-nam cua phu-huynh de cai tien co hoi hoc van cua con em dang hoc Anh van nhu sinh ngu thu hai.  

ERIC Educational Resources Information Center

This guide, in English, Spanish, and Vietnamese, aims to inform parents of students who have learned or are learning English as a Second Language about appropriate approaches for educating children so that they can work with schools to ensure a high quality education for their children. The emphasis is on explaining the laws, schools, and research…

Zelasko, Nancy; Antunez, Beth

250

The Full Employment Budget Surplus Concept as a Tool of Fiscal Analysis in the United States (L'excédent budgétaire de plein emploi, instrument de l'analyse budgétaire aux Etats-Unis) (El concepto de superávit presupuestario en pleno empleo como instrumento de análisis fiscal en los Estados Unidos)  

Microsoft Academic Search

The paper describes the concept of the full employment surplus and its method of estimation in the United States and analyzes (1) its general use as a summary measure of budget impact for purposes of policy evaluation and (2) its use in rules that govern the formulation of budgetary policy. The principal emphasis is on the first use of the

Daryl A. Dixon

1973-01-01

251

PRODUCCIÓN DE COMPLEJOS ENZIMÁTICOS CELULOLÍTICOS MEDIANTE EL CULTIVO EN FASE SÓLIDA DE Trichoderma sp. SOBRE LOS RACIMOS VACÍOS DE PALMA DE ACEITE COMO SUSTRATO PRODUCTION OF ENZYMATIC COMPLEX IN SOLID STATE FERMENTATION BY Trichoderma sp. USING PALM OIL EMPTY FRUIT BUNCH (EFB) AS SUBSTRATE  

Microsoft Academic Search

The oil palm industry in Colombia, the fifth world manufacter, generates lignocelulosic waste like the empty fruit bunch (EFB), which remains after removing the fruit of oil palm. Keeping in mind this characteristic, it can be used as substrate for cellulases production. In this study we evaluate the productivity of cellulases through native crop of Trichoderma viride T12 using EFB.

252

LGF («LIVER GROWTH FACTOR») como factor de proliferación, migración y diferenciación de las células madre neurales y su posible utilidad en enfermedad de Parkinson LGF («LIVER GROWTH FACTOR») as a factor involved in the proliferation, migration and differentiation of neural stem cells: Potential use in Parkinson's disease  

Microsoft Academic Search

Liver growth factor (LGF) promotes the proliferation and regeneration of different cell types, and preliminary studies indicate that LGF might be useful for neuroregenerative therapies. The aim of this work was to study the cell pro- liferative and neurogenic effects of LGF in a 6-OHDA Parkinson's disease (PD) experimental model. Intraventricular infusion of LGF increased bromodeox- yuridine (BrdU) incorporation in

2005-01-01

253

Sintesis y caracterizacion del WxRuySez para la reduccion electroquimica de oxigeno y su posible aplicacion como electrodo en celdas de combustible. (Synthesis and characterization of the WxRuySez from the electrochemical reduction of oxygen and their possible application as electrode in fuel cell).  

National Technical Information Service (NTIS)

In this communication the synthesis of the W(sub 0.03)RuSe(sub 0.47)O(sub 0.3) from the transition metal carbonyl compounds and the chalcogenide in m Xylene, the chemical characterization of the novel material was performed by neutron activation analysis ...

S. D. Ramirez

1995-01-01

254

o sup 14C como tracador do fluxo do carbono assimilado pelas plantas (milho, cana-de-acucar, feijao) e sua liberacao ao solo. ((14)C as tracer in the carbon flow assimilated by the plants (maize, sugar cane, bean) and it liberation to the soil).  

National Technical Information Service (NTIS)

The flow of carbon in three different crops, maize, beans and sugar cane was studied by use of (sup 14)V. The plants were exposed to an atmosphere with a constant concentration of the tracer for 12 hours in a biosynthesis chamber. The detection of the iso...

B. J. F. Paula Eduardo

1987-01-01

255

Avaliacao de Dados Do MSS-LANDSAT-4 Para O Mapeamento Geomorfologico No Semi-Arido COMO Suporte AO Planejamento Regional: Uma Abordagem Integrada (Area-Teste Regiao de Juazeiro-BA) (Evaluation of LANDSAT 4 MSS Data for Geomorphological Mapping in the Semiarid Environment for Regional Planning Purposes: An Integrated Approach (Study Site, the Juazeiro Region)).  

National Technical Information Service (NTIS)

The utilization of LANDSAT-MSS data is evaluated for geomorphological mapping at 1:100 scale in a semiarid environment for regional planning purposes. An integrated mapping approach was used. The study site is located in northern Bahia State and covers ne...

T. Gallottiflorenzano

1986-01-01

256

Validating growth and development of a seabird as an indicator of food availability: Captive-reared Caspian Tern chicks fed ad libitum and restricted diets [La validaci??n del crecimiento y desarrollo de un ave marina como un indicador de la disponibilidad de comida: pichones de Hydrogprogne caspia criados en cautiverio y alimentados ad libitum y dietas restringidas  

USGS Publications Warehouse

For seabirds raising young under conditions of limited food availability, reducing chick provisioning and chick growth rates are the primary means available to avoid abandonment of a breeding effort. For most seabirds, however, baseline data characterizing chick growth and development under known feeding conditions are unavailable, so it is difficult to evaluate chick nutritional status as it relates to foraging conditions near breeding colonies. To address this need, we examined the growth and development of young Caspian Terns (Hydroprogne caspia), a cosmopolitan, generalist piscivore, reared in captivity and fed ad libitum and restricted (ca. one-third lower caloric intake) diets. Ad libitum-fed chicks grew at similar rates and achieved a similar size at fledging as previously documented for chicks in the wild and had energetic demands that closely matched allometric predictions. We identified three general characteristics of food-restricted Caspian Tern chicks compared to ad libitum chicks: (1) lower age-specific body mass, (2) lower age-specific skeletal and feather size, such as wing chord length, and (3) heightened levels of corticosterone in blood, both for baseline levels and in response to acute stress. Effects of diet restriction on feather growth (10-11% slower growth in diet-restricted chicks) were less pronounced than effects on structural growth (37-52% slower growth) and body mass (24% lower at fledging age), apparently due to preferential allocation of food resources to maintain plumage growth. Our results suggest that measurements of chick body mass and feather development (e.g., wing chord or primary length) or measurement of corticosterone levels in the blood would allow useful evaluation of the nutritional status of chicks reared in the wild and of food availability in the foraging range of adults. Such evaluations could also inform demography studies (e.g., predict future recruitment) and assist in evaluating designated piscivorous waterbird conservation (colony) sites. ?? 2011 The Authors. Journal of Field Ornithology ?? 2011 Association of Field Ornithologists.

Lyons, D. E.; Roby, D. D.

2011-01-01

257

Capital Flows as an Offset to Monetary Policy: The German Experience (Les flux de capitaux peuvent-ils mettre en échec la politique monétaire? L'expérience allemande) (Los flujos de capital como neutralizadores de la política monetaria: La experiencia alemana)  

Microsoft Academic Search

Cette étude a pour objet d'établir le rapport existant entre les décisions de politique monétaire prises en Allemagne de 1963 à 1970 et les flux de capitaux et en particulier, d'examiner si le recours aux modifications des coefficients de réserves obligatoires est un moyen efficace de neutraliser les effets de flux de capitaux sur la masse monétaire. Fait important: la

Michael G. Porter

1972-01-01

258

Datura GENUS WEEDS AS AN EPIDEMIOLOGICAL FACTOR OF Alfalfa mosaic virus (AMV), Cucumber mosaic virus (CMV), AND Potato virus Y (PVY) ON SOLANACEUS CROPS Malezas del género Datura como factor epidemiológico del Virus del mosaico de la alfalfa (AMV), Virus del mosaico del pepino (CMV) y Virus Y de la papa (PVY) en Solanáceas cultivadas  

Microsoft Academic Search

A B S T R A C T Plant samples of jimsonweed (Datura stramonium L.) and thornapple (D. ferox L.) were collected to determine the presence of Cucumber mosaic virus (CMV), Alfalfa mosaic virus (AMV), and Potato virus Y (PVY) in Santiago, Chile (33º34' S lat, 70º38' W long, altitude 625 m.o.s.l.), using double stranded RNA (dsRNA) analysis and ELISA.

Juan Ormeño; Paulina Sepúlveda; Ricardo Rojas; Jaime E. Araya

259

Revolucionarios Silenciosos: Una Resena de la Campana Contra el Hambre que Llevan a Cabo los Cientificos Agricolas (y de Como Pudo Ayudar un Cultivo Desdenado: la Mandioca) (Quiet Revolutionaries: A Look at the Campaign by Agricultural Scientists to Fight Hunger and How the Much Neglected Cassava Could Help).  

National Technical Information Service (NTIS)

Over the next 30 years, yields of the major food crops must double to keep pace with global population growth. The essay tells two related stories about the fight against hunger. It looks at how agricultural researchers worldwide help feed a hungry world....

D. Wigg

1994-01-01

261

O Passado como Nacao: Imagens do Imperio nas Falas Reacionarias dos Anos 30 e 40 do Seculo XX: Uma Pequena Arqueologia do Debate Publico e Privado (The Past as Nation: Images of the Empire in the Reactionary Words of the 30s and 40s in the 20th Century: A Small Archaeology of the Public Debate versus the Private One).  

ERIC Educational Resources Information Center

Suggests an archaeology of the public debate versus the private one in Brazil through analysis of the reactionary speech of a religious leader, Dom Jose Mauricio da Rocha, which produced innumerable representations of the Brazilian Empire. (PA)

de Freitas, Marcos Cezar

1998-01-01

262

Efectos Especiales de Anclaje (Estudio sobre Regresiones de Juicios Condicionales). Parte 2: Invariancia del Juicio No-Condicional Como Valor Estandar Para el Juicio Condicional (Special Effects of Anchoring (Study of Regression of Conditional Judgements) Part 2: Invariance of Unconditional Judgments as Standard Value for the Conditional Judgment). Publication No. 31.  

ERIC Educational Resources Information Center

From the best-fit lines corresponding to sets of families of conditional judgements, the constant stimulus family and the constant condition family, both defined for a same scale object, the coordinate values of the point of intersection of both lines (indifference point) are obtained. These values are studied in relation to the mean values of the…

Lopez Alonso, A. O.

263

How To Talk to Your Doctor (and Get Your Doctor To Talk to You!). An Educational Workshop on Doctor Patient Communication = Como Hablarle a su Doctor (iY que su doctor le hable a usted!). Un seminario educativo sobre la comunicacion entre el doctor y el paciente.  

ERIC Educational Resources Information Center

This workshop, written in both English and Spanish, focuses on improving communication between physician and patient. In the workshop, the trainers will talk about "building bridges" between patient and doctor by understanding the doctor's role and his/her duty to the patient. According to the workshop, a person's doctor should communicate…

Baylor Coll. of Medicine, Houston, TX.

264

Jacobsen's catalyst anchored on Al-MCM-41 and NH2 group modified Si-MCM-41 as heterogeneous enantioselective epoxidation catalyst using in situ generated dimethyldioxirane as oxidant Catalizador de Jacobsen inmovilizado en Al-MCM-41 y en Si-MCM-41 modificada con grupos amino y su actividad en la epoxidación enantioselectiva heterogénea utilizando dimetildioxirano generado in situ como oxidante  

Microsoft Academic Search

The enantioselective epoxidation of three prochiral olefins over Jacobsen's catalyst immobilized on Al-MCM-41 and NH2-Si-MCM-41 in the presence of in situ generated DMD as the oxygen source was investigated. Experimental results indicate that the catalyst did not significantly suffer any change in its chemical structure. Therefore, the reusability of catalyst could be successfully achieved when it was immobilized by chemical

Jairo Cubillos; Wolfgang Hölderichb

2007-01-01

265

La geoquímica de Fe, Ti y Al como indicadora de la sedimentación volcanoclástica en la laguna costera de San Quintín, Baja California, México Geochemistry of Fe, Ti and Al as an indicator of volcanoclastic sedimentation in San Quintín coastal lagoon, Baja California, Mexico  

Microsoft Academic Search

The geochemistry of Fe, Ti and Al and the grain-size distribution were studied in 32 surficial sediment samples from San Quintín coastal lagoon (SQCL) in Baja California, in order to identify the presence of volcanoclastic sediment derived from the weathering and erosion of basaltic rocks from the San Quintín volcanic field (SQVF). The composition of the SQVF rocks is characterized

E Navarro; LW Daesslé; VF Camacho-Ibar; MC Ortiz-Hernández; EA Gutiérrez-Galindo

266

Low temperature alkaline pH hydrolysis of oxygen-free Titan tholins  

NASA Astrophysics Data System (ADS)

Titan, the largest moon of Saturn, is known for its dense and nitrogen-rich atmosphere. The organic aerosols which are produced in Titan's atmosphere are objects of astrobiological interest. In this paper we focus on their potential chemical evolution when they reach the surface and interact with putative ammonia-water cryomagma[1]. In this context we have studied the evolution of alkaline pH hydrolysis of Titan tholins (produced by an experimental setup using a plasma DC discharge named PLASMA) at ambient and low temperature. However, we identified oxygenated molecules in non-hydrolyzed tholins meaning that oxygen gets in the PLASMA reactor during the tholins synthesis [2]. Following this preliminary study the synthesis protocol has been improved by isolating the whole device in a specially designed glove box which protect the PLASMA experiment from the laboratory atmosphere. After confirming the non-presence of oxygen in tholins produced with this new experimental setup, the study of oxygen-free tholins' evolution has been carried out. A recent study shows that the subsurface ocean may contain a lower fraction of ammonia (about 5wt% or less [3]), as previously described by other teams [2,4]. Thus new hydrolysis experiments will take this lower value into account. Additionally, a new report [5] provides upper and lower limits for the bulk content of Titan's interior for various gas species. It also shows that most of them are likely stored and dissolved in the subsurface water ocean. But considering the plausible acido-alkaline properties of the ammonia-water ocean, additional species could be dissolved in the ocean and present in the magma. They were also included in our hydrolysis experiments. Taking into account these new data, four different hydrolysis have been applied to oxygen-free tholins. For each type of hydrolysis, we also follow the influence of the hydrolysis temperature on the organic molecules production. The preliminary qualitative and quantitative results of those experiments will be presented at EPSC.

Brassé, C.; Buch, A.; Raulin, F.; Coll, P.; Poch, O.; Ramirez, S.

2013-09-01

267

Peak shapes of acids and bases under overloaded conditions in reversed-phase liquid chromatography, with weakly buffered mobile phases of various pH: a thermodynamic interpretation.  

PubMed

We measured overloaded band profiles for a series of nine compounds (phenol, caffeine, 3-phenyl 1-propanol, 2-phenylbutyric acid, amphetamine, aniline, benzylamine, p-toluidine, and procainamidium chloride) on columns packed with four different C(18)-bonded packing materials: XTerra-C(18), Gemini-C(18), Luna-C(18)(2), and Halo-C(18), using buffered methanol-water mobile phases. The pHWS of the mobile phase was increased from 2.6 to 11.3. The buffer concentration (either phosphate, acetate, or carbonate buffers) was set constant at values below the maximum concentration of the sample in the band. The influence of the surface chemistry of the packing material on the retention and the shape of the peaks was investigated. Adsorbents having a hybrid inorganic/organic structure tend to give peaks exhibiting moderate or little tailing. The retention and the shape of the band profiles can easily be interpreted at pHsWS that are well above or well below the pKWS(a) of the compound studied. In contrast, the peak shapes in the intermediary pH range (i.e., close to the compound pKWS(a)) have rarely been studied. These shapes reveal the complexity of the competitive adsorption behavior of couples of acido-basic conjugated compounds at pHsWS that are close to their pKWS(a). They also reveal the role of the buffer capacity on the resulting peak shape. With increasing pHWS, the overloaded profiles are first langmuirian (isotherm type I) at low pHsWS, they become S-shaped (isotherm type II), then anti-langmuirian (isotherm type III), S-shaped again at intermediate pHsWS, and finally return to a langmuirian shape at high pHsWS. A new general adsorption isotherm model that takes into account the dissociation equilibrium of conjugated acidic and basic species in the bulk mobile phase accounts for these transient band shapes. An excellent agreement was achieved between experimental profiles and those calculated with a two-sites adsorption isotherm model at all pHsWS. The neutral species adsorbs strongly on a first type of sites that have a high density while the ionic species adsorb preferentially on a second type of sites that have a very low density. The evolution of the peak shape when the pHWS changes from acidic to basic is well explained by the weak buffer capacity of the mobile phase used compared to the concentration of the eluted compounds. PMID:19054520

Gritti, Fabrice; Guiochon, Georges

2009-01-01

268

Accumulation, solid partitioning and remobilisation of 99Tc in subtidal and intertidal sediments in the Irish Sea  

NASA Astrophysics Data System (ADS)

Recent studies have shown that accumulation of 99Tc in seabed sediments labelled by authorised radioactive liquid discharges into the NE Irish Sea from the Sellafield reprocessing complex is greater than previously thought. In this paper, new data on 99Tc concentration profiles in subtidal and intertidal sediments from the eastern and western Irish Sea are provided with a view to elucidating the processes responsible for the incorporation and retention of 99Tc in the seabed. The data show that substantial amounts of 99Tc have accumulated in the fine-grained subtidal sediments off the Cumbrian coast, particularly after increased releases from Sellafield following the commissioning of the Enhanced Actinide Removal Plant (EARP) in 1994. In all the cores taken in this area, 99Tc has been found to be present to depths in excess of 30 cm. Analysis of 137Cs and 241Am profiles, together with other supporting geochemical data, show a high degree of homogenisation of the sediments down to these depths as a result of physical and biological processes, and confirm that incorporation of 99Tc into the sediment compartment is actually the result of mixing and reworking, rather than active sediment accumulation. In contrast, active deposition of material transported from this mixed pool of sediment appears to be the dominant mechanism controlling 99Tc profiles in intertidal areas close to the Sellafield discharge outfall. Data obtained from the analysis of subtidal sediment cores from the western Irish Sea mud basin suggest that similar mixing processes to those occurring in the subtidal sediments of the eastern Irish Sea are also active in this area. Time-series data on 99Tc concentrations in surficial sediments from this basin, gathered in the period 1988-2004, inclusive, show a clear increase in concentrations, by a factor of ˜2, between samples collected pre-EARP and post-EARP. The constancy of 99Tc concentrations in surface sediments throughout the 1980s and the early-1990s suggests that little redissolution and export of 99Tc occurred over this extended period. A similar observation applies to the post-EARP period, when concentrations remained relatively constant despite the reported steady decrease in 99Tc concentrations in the overlying waters. This apparent lack of remobilisation is consistent with data from sequential extraction analyses, which indicate that the bulk of the 99Tc is strongly bound to non-labile geochemical phases, with only a small proportion associated with exchangeable and acido-soluble phases. Further, these analyses show that 99Tc is not associated with oxygen-sensitive and highly-reactive acid-volatile sulphides (AVS) to any significant extent.

Finegan, Paul; Vintró, Luis León; Mitchell, Peter I.; Boust, Dominique; Gouzy, Aurélien; Kershaw, Peter J.; Lucey, Julie A.

2009-09-01

269

Delirio (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca del delirio como una complicación a causa del cáncer o su tratamiento. Se discuten los enfoques de los cuidados médicos de apoyo, asi como farmacológicos para el manejo del delirio.

270

Resultados del Estudio Nacional de Colografía de Tomografía Computarizada: preguntas y respuestas  

Cancer.gov

Estudios anteriores encontraron que la colografía de tomografía computarizada, también conocida como colonoscopia virtual, era prometedora como método de examen selectivo de detección de cáncer colorrectal debido a su precisión, seguridad, rentabilidad y aceptabilidad por parte de los pacientes.

271

O conhecimento em farmacogenômica pode auxiliar no controle da pressão arterial em pacientes com hipertensão de difícil controle? Is pharmacogenomic knowledge of help in the management of difficult-to-control hypertension?  

Microsoft Academic Search

RESUMO Esta revisão tem como objetivo introduzir conceitos básicos de farmacogenética e de farmacogenômica, além de mostrar exemplos que demonstrem como polimorfismos genéticos podem modular suscetibilidade a doença e resposta às drogas. Aqui, enfocou-se como a farmacogenética\\/farma- cogenômica pode auxiliar no diagnóstico e tratamento da hipertensão de difícil controle. Exemplificando, polimorfismos podem alterar a farmacocinética de drogas usadas no trata-

Valéria C. Sandrim; José Eduardo Tanus-Santos

272

Múltiples estados de desorden en el etanol sólido  

Microsoft Academic Search

El diagrama de fases del etanol por debajo de los 169 K será presentado. Se mostrará que el etanol puede solidificarse en tres fases con diversos niveles de desorden,(como un vidrio(G), como un vidrio orientacional (OG) y como un cristal de fase rotora (RP)) además de en una fase totalmente cristalina. Las estructuras de estas tres fases serán presentadas tal

R. Fernández-Perea

2003-01-01

273

Investigaciones de Economía de la Educación 6  

Microsoft Academic Search

En este trabajo se estudian los determinantes individuales del capital social en España. El capital social influye en el desarrollo económico, tal y como demuestran numerosos estudios, y se puede definir como la confianza, tanto interpersonal como institucional, y los aspectos positivos de las redes y las normas sociales que faciliten la creación y el mantenimiento de una estructura social

Isabel Neira Gómez; Marta Portela

274

Rocuronio: ¿tiempo de comienzo o velocidad de acción?  

Microsoft Academic Search

-1 como relajante. Utilizando electromiografía se determinaron: el máximo efecto, tiempo para alcanzar un bloqueo del 80%, tiempo de comienzo, el intervalo entre estos últimos y el bloqueo diferencial durante estas etapas. La velocidad para cada período se calculó como la relación entre el % de blo- queo producido y el tiempo para lograrlo expresándose como %\\/segundo y también la

D. Steinberg

275

DESENVOLVIMENTO RURAL, MULHERES E TERRA - UM OLHAR SOBRE TIMOR-LESTE  

Microsoft Academic Search

O caminho percorrido para que as questões do género e do desenvolvimento e em especial a sua interligação sejam assuntos importantes e alvo de atenção tanto académica como política, foi longo. Várias áreas do conhecimento, como a sociologia, a antropologia e a economia, contribuem para a construção do conhecimento neste domínio, a par de outras mais recentes como os estudos

Vanda Margarida De Jesus Dos Santos Narciso; Pedro Damiao de Sousa Henriques

2008-01-01

276

Effet de la substitution du cuivre par du lithium sur les proprietes de l'oxyde spinelle lithium(x)cuivre(y-x)cobalt(3-y)oxygen(4) etudie pour l'electrocatalyse de la reaction de degagement de l'oxygene en milieu alcalin  

NASA Astrophysics Data System (ADS)

L'electrolyse de l'eau demeure la seule technologie industrielle de generation de l'hydrogene et de l'oxygene tres purs sans rejet de CO2 dans l'atmosphere, ce qui le rend tres attrayant par rapport a la combustion de carburants fossiles qui provoque presentement de serieux problemes environnementaux. Dans le but d'ameliorer le rendement de ce procede, nous avons developpe de nouveaux materiaux d'anode peu couteux, a base de l'oxyde mixte CuyCo3-yO 4, qui possedent une cinetique rapide pour la reaction de degagement de l'oxygene (RDO). Cette reaction suscite un interet particulier en raison de la surtension d'activation relativement elevee a l'anode qui cause la principale perte de rendement du procede. Une etude systematique a ete effectuee sur la substitution du Cu par du Li (0 a 40%), afin d'elucider les proprietes electrocatalytiques des oxydes LixCuy-xCo3-yO4. Ces oxydes, prepares sous forme de poudres par decomposition thermique des nitrates precurseurs entre 300 et 500°C, ont montre (DRX et FTIR) une structure spinelle inverse non-stcechiometrique avec une diminution du volume de la maille cristalline. La surface specifique par BET est d'environ 6 m2 g-1. Le pcn, obtenu par titrage acido-basique, a indique une diminution de la force du lien M-OH avec le taux du Li dans l'oxyde. Les analyses par XPS, realisees sur des films d'oxyde prepares par nebulisation reactive sur un substrat lisse de nickel, revelent un enrichissement de la surface en Cu a partir de 30% Li, et la presence des cations de surface Co2+, Co3+, Cu +, Cu2+ et Cu3+. La concentration de ce dernier montre un maximum a 10 et 20% Li. Suite a la substitution du Cu par du Li, la compensation de la charge serait assuree principalement par la formation d'especes Cu3+ pour les oxydes contenant jusqu'a 20% Li, et par la formation d'especes Co3+ aux taux de substitution superieurs. Les micrographies MEB montrent une morphologie hemispherique des particules d'oxyde reparties uniformement sur le substrat de nickel avec une tendance a l'agglomeration lorsque le taux de Li est accru. Les micrographies AFM revelent une micro-porosite de ces particules d'oxyde. Les films minces deposes sur un substrat de verre ont montre une conductivite tres interessante de l'ordre de 103O-1 cm-1 pour LixCuy-x Co3-yO4 comparee a 2,8 O-1 cm-1 pour Co3O4. La spectroscopie d'impedance a permis de distinguer les processus de la surface interne des films d'oxydes de ceux de l'interface electrode/electrolyte. Les courbes Mott-Schottky (1/C2 en fonction du potentiel) montrent que les films d'oxyde se comportent comme des semi-conducteurs de type p tres dopes (degeneres). Le potentiel de bandes plates et la densite des porteurs de charge majoritaires des oxydes LixCuy-xCo3-yO4 sont de l'ordre de 0,48 a 0,52 V et 1019 a 10 20 cm-3 respectivement. Pour Co 3O4 ces parametres sont de 0,47 V et ?10 18 cm-3. (Abstract shortened by UMI.)

Fatih, Khalid

277

Zinc, cadmium, and copper mobility and accumulation in reeds (Phragmites australis) in urban sediments from two stormwater infiltration basins  

NASA Astrophysics Data System (ADS)

Infiltration basins are stormwater management techniques that are widely used to reduce stormwater volume. The settling of stormwater particles leads to a contaminated sediment layer at the basin surface. Phragmites australis used in constructed wetlands are widely present in infiltration basins. Such plant can play a role on the fate of heavy metals either directly by their uptake or indirectly by modification of physico-chemical characteristics of the sediment. The aim of this study is to assess Zn, Cd and Cu potential mobility and their bioaccumulation by reeds during plant's growth in urban sediments offering two different geochemical contexts. Methodology is based on the monitoring (in june, august and december) of physico-chemical characteristics of sediment deposit in two basins. These basins, "Minerve" and "Grézieu", located on both sides of Lyon city are characteristic of two different geochemical context. "Minerve" is in the east and "Grézieu" in the west part. The geology of the eastern part of Lyon is characterized by carbonated fluvio-glacial deposits. In the western part, the subsoil is mainly composed of gneiss and granit. Moreover, 20 cm of gravel and a sand layer were initially added at the surface of the "Grézieu" basin. In "Minerve", a clay material was initially added and a filter trench was built along the basin to allow water infiltration. We characterized the sediment deposit by the identification of their geochemical characteristics (Zn, Cu, Cd, total content, pH, CEC, C/N, carbonates and major elements contents …). Then we studied the potential mobility of the three metals by single chemical extraction (CaCl2 for the exchangeable phase, acetate buffer for the acido-soluble phase and diethylenetriamine-pentaacetic acid (DTPA) for the fraction associated to the organic matter). The accumulation of Zn, Cd and Cu in aerial parts and roots of the reeds was also measured. The results show clearly that "Grézieu" sediment is more enriched in organic matter and metals than "Minerve". For example, Zn contents are equal to 400 mg/kgDW in "Grézieu" whereas it is equal to 80 mg/kgDW in "Minerve". In the most contaminated basin "Grézieu", metals mobility is mainly controlled by their association with carbonates and organic matter. Thus, copper associated with organic matter may represent almost 70% of the total copper content. In the "Minerve" sediment, the metals are distributed on the different sediment components, with very stable associations on the different mineral phases. The reed accumulates more metal in the context of the most contaminated basin (Grézieu), but without any differences in bioconcentration factors. The high metal contents in "Grézieu" sediments limited also the growth of reed. Moreover, for "Grézieu" sediment, characteristics evolve with the seasons. Thus, texture decreases from June to December in parallel with an increase in organic matter and metals in the sediment deposit.

Bedell, J.-P.; Saulais, S.; Delolme, C.

2012-04-01

278

Effects of Long-Term Acid-Mine Drainage Contamination on Diversity and Activity of Sulfate-Reducing Bacteria in a Natural Salt Marsh.  

NASA Astrophysics Data System (ADS)

Constructed wetlands have been studied as sites or analogs for in situ bioremediation of metal contaminants from acid mine drainage (AMD) or industrial sources (e.g. Webb et al. 1998). Wetlands bioremediation necessarily invokes the ubiquity and robustness of sulfate-reducing bacteria (SRB) to sequester dissolved metals into various poorly soluble metal-sulfides (e.g. PbS, CdS). However, few studies of natural wetlands under long-term ecological forcing by AMD or other contaminant sources are available for context. We are investigating the microbial diversity, mineralogy and geochemistry of a highly contaminated salt marsh along the East Central San Francisco Bay. For nearly a half-century, areas within this marsh have received acidic and/or metal-rich groundwaters from near-surface pyrite tailings (transported there from Iron Mountain Mine, near Redding, CA) and local industrial sources (e.g. paint and explosives manufacturers). Sediment cores (30-40 cm long) were taken from six contaminated sites in the marsh with pH range of ˜2 to ˜8. Previous analyses (URS Corp. 2001) reported As, Cd, Cu, Se, Zn, and Pb present in sediments at extremely high concentrations (100s of ppm), yet our ICP-AES analyses of pore waters showed only As present at concentrations of 10-50 ppb. We infer, from high-resolution transmission electron microscope (HRTEM) studies of biogenic (SRB biofilm) ZnS (Moreau et al. 2003, in review) and marsh sediments, that contaminant metals have been sequestered into aggregates of nanocrystalline metal-sulfides. Continuous-flow isotope ratio mass spectrometer (CF-IRMS) analyses of pore-water sulfate and sedimentary sulfides allow resolution of contributions to dissolved sulfate and sulfide from tailings oxidation and dissimilatory sulfate reduction. Sulfate analyses from subsections of three cores (pH 2-3, 6-7, 7-8, respectively) all yield ? 34S values consistent with bacterial sulfate reduction. We note that all three cores also contain very fine-grained black muds that are distinguishable from coarser pyrite cinders, and exhibit a noticeably strong sulfide odor. Aero- and halo-tolerant SRB were enriched from circumneutral pH cores, and we hypothesize that acido-tolerant SRB may also be present. Analysis of restriction fragment length polymorphism of whole community 16S rDNA extracted from each core shows an expected increase in diversity between acidic and circumneutal sediments, and clone libraries from both contaminated and uncontaminated marsh sediments are being compared to assess the impact of long-term contamination. References: Webb et al. 1998, J. Appl. Microbio., 84, 240-248; Moreau et al. 2003, Amer. Min., in review; URS Corp. 2001, Report 51.09967067.00.

Moreau, J. W.; Banfield, J. F.

2003-12-01

279

The extreme environments and their microbes as models for extraterrestrial life  

NASA Astrophysics Data System (ADS)

Life exists almost everywhere on Earth. Presence of liquid water is a prerequisite for life (Oren, 2008). Living organisms are not only found in `normal' habitats (from the anthropocentric view). Many types, especially of microorganisms, not only tolerate harsh environmental conditions, but even thive in them. Such organisms that resist very harsh physical and chemical conditions in their habitats are termed `extremophiles'. Some extremophilic microorganisms are able to overcome more than one type of extreme conditions in their environment. For example, some `polyextremophiles' grow under hundreds of atmospheres of hydrostatic pressure (barophiles) and at very low, or alternatively at very high temperatures. In many hot springs there are acido-thermophiles that tolerate elevated temperatures and very low pH levels (e.g. the Cyanidium caldarium group, see Seckbach 1994). Members of Cyanidium are able to thrive in pure CO2, a condition not tolerated by most algae (Seckbach et al., 1970). Some thermophilic Archaea grow at temperatures up to 1130C and possibly even higher. In the Arctic and Antarctic regions and in the permafrost region in Siberia there are cold-loving microorganisms (psychrophiles) which are able to grow at -200C. Many types of Bacteria and Archaea tolerate extreme dryness, and spores of Bacillus and relatives that have been encapsulated within salt crystals may have survived in a dormant state for thousands and even millions of years, and still can be revived today. Other extremophiles tolerate salt concentrations up to saturation. Halophilic microorganisms such as found in the Dead Sea or in the Great Salt Lake have developed different strategies to cope with the high osmotic pressure of their environment. Some (e.g. the unicellular green alga Dunaliella salina) balance the salts in their medium by accumulating organic compounds such as glycerol. Others (halophilic Archaea of the order Halobacteriales, as well as a few representatives of the Bacteria such as the aerobic Salinibacter ruber and the anaerobic members of the Halanaerobiales) use KCl to provide the necessary osmotic balance. Some of these extreme halophiles possess light-driven proton pumps (bacteriorhodopsin, xanthorhodopsin) and chloride pumps (halorhodopsin) that enable them to use photons to drive energetically expensive reactions (Oren, 2002; Oren, 2008). Extremophiles can serve as models for extraterrestrial microbes that may live in celestial bodies. The most promising among these to contain habitable areas are Mars (where the Phoenix Lander recently discovered water) and the Jovian satellite Europa; also Titan (the moon of Saturn) has some features that resemble those that may have existed on Earth during its earliest stages. From the characteristics of extremophilic microorganisms found on the present-day Earth, we can derive some insights on the question of habitability of other planets, and learn about possible bioindicators that may be suitable when searching for extraterrestrial life (Seckbach and Chela-Flores, 2007). Compounds such as methane on Mars or traces of sulfur on Jupiter's moon Europa may have been of biogenic origin and may possibly have been endogenic (Chela-Flores, 2006; Chela-Flores and Kumar, 2008). Biogeochemical tests have been proposed for missions that are in the planning stages, such as LAPLACE (Blanc et al., 2008), a mission to Europa and the Jupiter system by ESA's Cosmic Vision Programme. The finding of elemental sulfur on Europa may be of special interest. One possibility is that such traces of sulfur might have originated from the metabolism of extremophilic sulfurreducing microorganisms. Radiation may damage traces of biogenic sulfur deposited on the surface. The stopping depth for ionic radiation in the Jovian magnetosphere is expected not to exceed 1 cm (Greenberg, 2005; Dudeja et al., 2008). Thus, organic molecules would not be destroyed below such a thin layer. Based on to the preliminary results of the British Penetrator Consortium (Smith et al., 2008), a modest penetration depth of penetrators (ins

Seckbach, J.; Oren, A.; Chela-Flores, J.

2008-09-01

280

Cáncer de hígado  

Cancer.gov

Información acerca del cáncer de hígado, lo cual incluye temas como tratamiento, prevención, genética, causas, exámenes selectivos de detección, estudios clínicos y estadísticas del Instituto Nacional del Cáncer.

281

Complicaciones gastrointestinales (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca del estreñimiento, impacción, obstrucción intestinal y diarrea como complicaciones del cáncer o su tratamiento. Se discute el manejo de estos problemas.

282

ESTUDO GEOAMBIENTAL DO CURSO MÉDIO DA BACIA HIDROGRÁFICA DO RIO VERDE - CAMPO LARGO\\/PR  

Microsoft Academic Search

Resumo: A preocupação com questões ambientais tem crescido nos últimos anos motivada, principalmente, pela busca da sociedade por conhecimentos que apontem amenização e soluções de problemas tanto em áreas urbanas como rurais. Diante desta preocupação e utilizando como base teórico-metodológica a Geomorfologia Ambiental, este trabalho apresenta um estudo geoambiental do curso médio da bacia hidrográfica do rio Verde, localizado no

Maristela Moresco Mezzomo; Andreia Quintão Soares

283

insURGEnCiA Y REPREsiÓn. ACERCA DE LA TEORÍA DE LOs DOs DEMOniOs  

Microsoft Academic Search

Resumen: La conocida en Argentina como Teoría o tesis de los dos demonios se ha utilizado para, si no justificar, sí al menos querer dar una explica - ción simplista al advenimiento del golpe del gene- ral Videla y la consiguiente dictadura conocida en Argentina como el Proceso. El artículo analiza los discursos e imágenes sobre cada uno de los

José Manuel Barrio Terol

284

Helenistic Encomium: A Reflection on Comics and Rhetoric  

ERIC Educational Resources Information Center

This video reflection starts in a presentation on comics at the Thomas R. Watson Conference last October, which prompted the author to explore the etymology of cosmos and comos through an alternate reading of Gorgias' "Encomium of Helen". The author then works with comos, as revelry, to offer thoughts on comics as a form of multimodal composition…

Helms, Jason

2009-01-01

285

Entrevista a Gao Xingjian, premio Nobel de Literatura  

Microsoft Academic Search

Profundamente filosófico, Gao Xingjian, premio Nobel de Literatura, evoca la huida como protección ante el despotismo y la agresividad del autoritarismo político. Exiliado en París desde hace veinte años, Gao recurre a la creación literaria como forma de huida de la ideología y de otros “ismos” que pervierten al ser humano y le despojan de su libertad.

Dani Triadó

2007-01-01

286

HERRAMIENTAS GERENCIALES PARA EL POSICIONAMIENTO DE LA EMPRESA SOSTENIBLE Y EL MARKETING ECOLÓGICO Management tools and positioning of sustainable enterprises and marketing ecological  

Microsoft Academic Search

RESUMEN La civilización humana está direccionando su acción comercial hacia el componente ecológico, tomando como principio la gerencia para proyectarse al mercado verde es decir, productos que generen menor impacto ambiental. La presente investigación tuvo como objetivo determinar las herramientas gerenciales para el posicionamiento de la empresa sostenible y el marketing ecológico. Este trabajo de investigación fue descriptivo, transeccional y

Dalia Plata de Plata

287

Another city is possible  

Microsoft Academic Search

Resumo: Este texto visa a alertar para a urgência de se projetar outra organização da cidade moderna. Da forma como a cidade se estruturou na modernidade, tornou-se inviável para a convivência humana. Em função de sua opção pelo mercado e pelo consumismo numa sociedade de desiguais, de incluídos-excluídos, a cidade morre todos os dias um pouco como espaço de convivência,

Euclides Redin; Rosane Romanini

288

El futuro de la Medicina General en Europa. Desarrollo y Modelos Conceptuales. I Parte  

Microsoft Academic Search

o me gusta hacer de aprendiz de brujo pero intentare exponer lo que veo, que a buen seguro no es como lo verán otros compañe- ros y con toda certeza será distinto de lo que ocurra en un sector extraordinariamente dinámico como el sanitario y sometido a la influencia de tantos factores, desde los sociales a los políticos y económicos

J. J. RODRÍGUEZ SENDÍN

2001-01-01

289

DEPRESIÓN EN NIÑOS Y ADOLESCENTES: INFORMACIÓN PARA PADRES Y EDUCADORES DEPRESSION IN CHILDREN AND ADOLESCENTS: A PRIMER FOR PARENTS AND EDUCATORS  

Microsoft Academic Search

La depresión es un problema serio de salud que puede afectar a personas de todas las edades, incluyendo a niños y adolescentes. Generalmente se define como una experiencia en la que persiste una disposición de ánimo triste o irritable, así como también anhedonia, una pérdida de la habilidad de experimentar placer en casi todas las actividades. Incluye también una gama

290

DESINFICAÇÃO DE BIOMASSA FLORESTAL  

Microsoft Academic Search

1. INTRODUÇÃO Todas as industrias que utilizam a madeira como matéria-prima, têm ao final do processamento uma grande quantidade de resíduos, tanto na industria como na floresta. Na maioria das vezes esses resíduos industriais, constituem-se num grave problema, devido à quantidade, dispersão e dificuldade de manuseio que os mesmos apresentam. Por outro lado, exigem grandes áreas para armazenamento ou simplesmente

Antonio José Migliorini

291

INFLUENCIA DE LA MICROESTRUCTURA Y DE LOS ESTADOS TRIAXIALES DE TENSIONES EN FENÓMENOS DE FISURACIÓN INDUCIDA POR AMBIENTE  

Microsoft Academic Search

Resumen. La Fisuración Inducida por Hidrógeno (FIH), es uno de los fenómenos de corrosión bajo tensión más habitual en aquellas aplicaciones industriales que se encuentran en contacto con este elemento químico, como sucede en oleoductos, gasoductos, reactores de hydrotreating, etc. Existen numerosos estudios referentes al transporte y acumulación de hidrógeno en el metal, así como a la variación de propiedades

A. Cayón; J. A. Álvarez; F. Gutiérrez-Solana

2003-01-01

292

NOTIFICAÇÕES TÉCNICAS E FITOSSANITÁRIAS À OMC: QUAL O IMPACTO NAS EXPORTAÇÕES AGRÍCOLAS DO BRASIL?  

Microsoft Academic Search

É notória a crescente importância das medidas técnicas, sanitárias e fitossanitárias às exportações brasileiras de produtos agrícolas, tais como: certificação de origem, avaliação de conformidade, normas e procedimentos técnicos, etc. Essas medidas têm sido formalizadas em notificações aos acordos TBT e SPS da OMC, vigentes desde 1995. Cabe ressaltar, no entanto, que essas medidas podem servir como barreiras protecionistas quando

Braulio Martins Bueno; Orlando Monteiro da Silva

2008-01-01

293

Caracterización del mercado de energía elétrica para usuarios no regulados en Colombia  

Microsoft Academic Search

En este artículo se presenta un análisis sobre las características del mercado de energía para usuarios no regulados en Colombia, el cual puede ser considerado como un sub-mercado dentro del mercado global de energía eléctrica en Colombia. En este análisis se incluye un indicador de concentración de mercado (Herfindahl-Hirschman), así como los porcentajes de participación en cubrimiento de demanda y

Ana Cecilia Escudero; Sergio Botero Botero

2006-01-01

294

LOS ÓRDENES DE LA VIOLENCIA: ESPECIE, SEXO Y GÉNERO 1  

Microsoft Academic Search

En la actualidad estamos asistiendo a un ejercicio de ingeniería social consistente en presentar, como un hecho, como conocimiento de sentido común, la contrapos ición violentos\\/demócratas. Se considera incuestionable que violencia y democracia forman una antinomia, dos formas de abordar las cuestiones políticas opuestas y mutu amente excluyentes. Un trabajo paralelo es el que se está haciendo en relación a

MARÍA JESÚS IZQUIERDO

1998-01-01

295

Gobierno corporativo, un desafio reciente para la gerencia estratégica empresarial  

Microsoft Academic Search

El Gobierno Corporativo en Colombia es visto, como la oportunidad que tienen nuestras empresas de acceder y competir abiertamente en los mercados internacionales, esto en razón a que muchos inversionistas las consideran como las palabras mágicas que abren o cierran puertas en los negocios internacionales, la transparencia, la probidad, las buenas prácticas empresariales, y el control, se han convertido en

A. M Cano Morales

2006-01-01

296

POSIBILIDADES, LOGROS Y DESAFÍOS EN LA IMPLEMENTACIÓN DE MODELOS DE CALIDAD EN LOS GOBIERNOS LATINOAMERICANOS  

Microsoft Academic Search

Este trabajo revisa el significado y los alcances del concepto de calidad en el ámbito estatal, su rol en el paradigma administrativo conocido como nueva gerencia pública, los modelos más importantes, las particularidades de los gobiernos en Latinoamérica y varios de los proyectos de incorporación de programas de calidad en ellos. Su realización se basó tanto en investigación documental como

JAIME TORRES FRAGOSO

2011-01-01

297

El papel del gobierno en el desarrollo económico: una reflexión a partir de la experiencia  

Microsoft Academic Search

RESUMEN El trabajo expone el aprendizaje obtenido como producto de años de trabajo guberna- mental buscando opciones para impulsar el desarrollo económico competitivo de Jalisco. Se resumen los objetivos prioritarios que guiarían la política económica, así como las estrategias definidas para alcanzarlos; se examinan algunas de las herramientas aplica- das para motivar la cooperación orientada a lograr eficiencia colectiva en

Laura Guevara Domínguez

298

El gobierno de la educación en Inglaterra y Perú: una mirada comparada desde la economía política  

Microsoft Academic Search

Durante los últimos treinta años, el gobierno de la educación, como el de otros sectores, ha experimentado cambios importantes que han redefinido las escalas en las que se gobiernan los servicios educativos, así como quiénes son los actores responsables de dichos servicios. Este trabajo explora tales cambios en dos casos particulares, Inglaterra y el Perú, dos contextos cuya poca similitud

María Balarín

2012-01-01

299

INNOVACIÓN EN LOS GOBIERNOS SUBNACIONALES DE MÉXICO: EL CASO DEL ESTADO DE SAN LUIS POTOSÍ  

Microsoft Academic Search

En los últimos años se ha discutido el papel de los gobiernos subnacionales como entes tomadores de decisiones y generadores de política en diversos ámbitos, considerando que las prácticas novedosas y la participación de diversos actores gubernamentales y no gubernamentales son un factor detonante del desarrollo en el diseño e implementación de política pública. Estas nuevas formas —entendidas como innovación—

Mario E. Ibarra Cortés; Erika García Méndez

2010-01-01

300

Habilidades Sociais e Problemas de Comportamento de Pré- Escolares: Comparando Avaliações de Mães e de Professoras Preschooler's Social Skills and Behavior Problems: Comparison between Mother and Teacher Assessments  

Microsoft Academic Search

Resumo Este estudo comparou avaliações de mães e professoras, sobre habilidades sociais e problemas de comportamento de crianças, identificadas pelas professoras, como tendo problemas de comportamento. Participaram mães e professoras de 24 crianças com problemas de comportamento e 24 crianças indicadas como sendo socialmente habilidosas. Foram utilizados o Questionário de Comportamentos Socialmente Adequados e a Escala Comportamental Infantil, versões para

Alessandra Turini Bolsoni-Silva; Edna Maria Marturano; Verônica Aparecida Pereira; Jair Wagner de Souza Manfrinato

301

PUBLIC HEALTH AND ENVIRONMENTAL POLLUTION: PRECAUTIONARY PARADIGMS Saúde pública e poluição ambiental: paradigmas precautórios  

Microsoft Academic Search

RESUMO Objetivos: Apresentar reflexões envolvendo perspectivas ambientais, saúde pública e ações antropogênicas relacionadas ao crescente consumo decorrente do modernismo instaurado no mundo. Síntese de dados: O paradigma precautório surge como constatação e reconhecimento propiciado pelas incertezas científicas e avaliação inadequada dos impactos das atividades humanas que contribuíram para a degradação ambiental e prejudicaram a saúde humana. Tendo como base o

Aldo Pacheco Ferreira

302

DIAGNOSTICO DEL SISTEMA DE GESTIÓN DE LA CALIDAD SEGÚN LA NC ISO 9001:2008  

Microsoft Academic Search

El presente trabajo se realizó en una entidad dedicada a la prestación de servicios logísticos, el cual posee Certificado el Sistema de Gestión de la Calidad en lo adelante (SGC) según la NC ISO 9001\\/2008. Se trazó como objetivo diagnosticar el Sistema de Gestión de la Calidad, Tomando como guía la NC ISO 9001\\/2008. Para el desarrollo de esta investigación

Arles Segura Maturell

2011-01-01

303

DIAGNÓSTICO AL SISTEMA DE GESTIÓN DE LA CALIDAD EN LA VILLA MIRADOR DE MAYABE, HOLGUÍN  

Microsoft Academic Search

El trabajo fue realizado en la Villa Mirador de Mayabe con el propósito de diagnosticar el sistema de gestión de la calidad que presenta la entidad, teniendo presente la Norma Cubana ISO 9001: 2008, así como valorar el funcionamiento de los elementos que estructura la Gestión Estratégica de la entidad como proceso rector y punto de partida de la gestión

Yunelsy Ortiz Chávez; Amaury Ricardo Garrido Tapia

2012-01-01

304

JUEGO SOCIODRAMÁTICO Y ESQUEMAS DE GÉNERO. UNA INVESTIGACIÓN EN EDUCACIÓN INFANTIL  

Microsoft Academic Search

El trabajo que aquí se presenta ha tenido como objetivo analizar, a través de métodos etnográficos, los comportamientos de niños y niñas de cinco años en el denominado juego sociodramático para comprobar si se percibían diferencias en relación al género. El planteamiento teórico del que hemos partido ha sido el enfoque socio-cultural (Vygotski, Elkonin, Bruner) que entiende este juego como

Emma Lobato

305

LOS ESTEREOTIPOS SOCIALES  

Microsoft Academic Search

Cuando una mujer se queda embarazada, es habitual escuchar cómo se le pregunta si sabe si será niño o niña. Es como si todo lo que un embarazo conlleva, se redujera a esa cuestión, considerada como lo crucial, lo más importante. Y nos preguntamos, ¿ por qué necesitamos saber el sexo del bebé?, ¿no es más importante preguntar por la

Nuria María Palanco López

2009-01-01

306

Prevalencia y características de los síntomas externalizantes en la infancia. Diferencias de género  

Microsoft Academic Search

En este trabajo se exponen las características de los síndromes empíricos de tipo externali- zante, así como su prevalencia en una muestra clínica pediátrica. Se utilizó como instrumento el Inventario Clínico Infantil (ICI), basado en la segunda parte del Child Behavior Checklist (CBCL), que evalúa comportamientos y emociones. Se ha aplicado a 300 niños y niñas de eda- des comprendidas

Concepción López-Soler; Maravillas Castro Sáez; Mavi Alcántara López; Visitación Fernández Fernández; José A. López Pina

2009-01-01

307

EFECTO DEL GATUÑO SOBRE LA FERTILIDAD DEL SUELO Y LA BIOMASA HERBÁCEA EN PASTIZALES DEL CENTRO DE MÉXICO Effect of Catclaw Mimosa on Soil Fertility and Forage Yield in Rangelands in Central Mexico  

Microsoft Academic Search

RESUMEN El trabajo se realizó durante los años 2002 y 2003, en los estados de Aguascalientes y Jalisco, con el objetivo de evaluar el efecto del gatuño (Mimosa monancistra) en el grado de asociación de algunas variables edáficas, como pH, materia orgánica (MO), fósforo, calcio y magnesio, así como la cantidad de biomasa herbácea en tres sitios con diferente grado

Ernesto Flores; Juan Frías; Pedro Jurado; Víctor Olalde; Juan de Dios Figueroa; Arturo Valdivia; Edmundo García

308

ESTRESSE, ASPECTOS PSICOSSOCIAIS DO TRABALHO E DISTÚRBIOS MUSCULOESQUELÉTICOS EM TRABALHADORES DE ENFERMAGEM STRESS, PSYCHOSOCIAL ASPECTS OF THE WORK AND MUSCULOSKELETAL DISORDERS IN NURSING WORKERS ESTRÉS, ASPECTOS PSICOSOCIALES DEL TRABAJO Y DISTURBIOS MUSCULOESQUELÉTICOS EN TRABAJADORES DE ENFERMERÍA  

Microsoft Academic Search

RESUMO: RESUMO: RESUMO: RESUMO: RESUMO: A enfermagem é reconhecida como uma das ocupações com alto risco de estresse e adoecimento. Os distúrbios musculoesqueléticos ganham proporção cada vez maior entre esses profissionais. Este estudo tem como objetivo apresentar algumas proposições sobre a relação do estresse e dos fatores psicossociais do trabalho na ocorrên- cia de distúrbio musculoesquelético e caracterizar o Modelo

Tânia Solange; Bosi de Souza; Rosane Harter

309

Uma Análise Tipológica da Dinâmica dos Arranjos e Sistemas Produtivos e Inovativos Locais (Aspil?S) Do Nordeste do Brasil  

Microsoft Academic Search

O presente trabalho tem como objetivo apresentar a dinâmica produtiva e inovativa dos Arranjos e Sistemas Produtivos e Inovativos Locais (ASPILs), tendo como foco os ASPILs nordestinos. Para tanto, foi utilizado o arcabouço da teoria evolucionária tendo por base o conceito de Sistema Nacional de Inovação do qual gerou a conceituação de ASPIL. Assim, buscou-se apresentar a dinâmica de arranjos

Diogo Araújo Sampaio

310

ORIGENS DA FORMAÇÃO AGRÁRIA SUL RIO-GRANDENSE NO CONTEXTO BRASILEIRO lovois@ufrgs.br Apresentação Oral-Estrutura, Evolução e Dinâmica do s Sistemas Agroalimentares e Cadeias Agroindustriais  

Microsoft Academic Search

Resumo Partindo-se do pressuposto que a dinâmica do desenvolvimento rural de uma região é historicamente orientada, impõe-se a neces sidade de um aprofundado conhecimento acerca dos processos que contribuíram para a sua formação agrária. Neste sentido, o presente trabalho tem como objetivo inci tar a uma reflexão sobre a questão agrária e como ela tem condicionado a dinâmica do desenvolvimento

TANICE ANDREATTA; LEONARDO ALVIM BEROLDT; ELVIS ALBERT; ROBE WANDSCHEER; LOVOIS DE ANDRADE

311

28. Modelamiento y Simulación de Fenómenos Astronómicos bajo un Enfoque Sistémico1  

Microsoft Academic Search

La Dinámica de Sistemas como herramienta metodológica para el modelamiento y simulación de fenómenos complejos, surge como una buena alternativa para el tratamiento de determinados fenómenos astronómicos y astrofísicos, a partir de un proceso de comprensión y construcción de un modelo matemático aprovechando las oportunidades que ofrece el pensamiento sistémico y la visualización de su comportamiento dinámico a partir de

Hugo Hernando; Andrade Sosa; Carlos Jaime; Barrios Hernández; Orlando José Katime Santrich

312

El profesional sanitario y el Código Penal (y II)  

Microsoft Academic Search

En esta segunda parte se abordan otros delitos recogidos por el Código Penal1 en los que se puede ver involucrado el profesional que ejerce la Medicina General. Son temas de gran actualidad social, y en cierto modo controvertidos, como la eutanasia (aun- que el Código Penal no la nombra de forma directa), y delitos novedosos, como los relativos a la

Pastor Bravo MM; Rodes Lloret F; Rubio Lucas

313

La contradicción entre identidad vivida e identificación jurídico-política  

Microsoft Academic Search

Este artículo quiere llamar la atención de los antropólogos españoles sobre una contradicción implícita, por no decir sepultada, en los discursos sobre la identidad. Se trata de la contradicción entre la identidad como expresión de lo vivido y la identidad como quimera, y a la vez, estigma clasificatorio. Si bien, varias opiniones tratan de hacer pasar lo segundo por lo

Ignasi Terradas i Saborit

2004-01-01

314

Armonización legislativa en materia societaria en el Mercosur: una necesidad o una quimera?  

Microsoft Academic Search

La década del noventa puede ser sencillamente indicada como hito en cuanto a un desmesurado proceso globalizador en marcha. La llamada aldea global presenta un desarrollo cada vez más veloz que involucra distintas variables. Como consecuencia inmediata de tal realidad se destaca un notable incremento de los negocios internacionales, en especial en todo lo relativo a los espacios integrados. Aparece

Sara Lidia Feldstein de Cárdenas; Luciana Scotti; Mónica Rodriguez; Flavia Medina; Vera Baez Peña Wirt; Yamila Cárdenas

315

Caracterización espectroscópica de hielos de interés atmosférico y astrofísico  

Microsoft Academic Search

En años recientes se ha incrementado el estudio de procesos físicos y químicos que tienen lugar en la superficie o el interior de hielos, tanto en medios astrofísicos como en la atmósfera terrestre y en otros cuerpos del sistema solar. Se ha comprobado que las partículas heladas actúan como catalizadores de reacciones químicas, que no ocurrirían en su ausencia. En

R. Escribano

2003-01-01

316

Produção de gramíneas do gênero Brachiaria sob níveis de sombreamento  

Microsoft Academic Search

RESUMO - O trabalho foi realizado com o objetivo de avaliar a produção de B. decumbens cv. Basilisk e B. brizantha, cultivares Marandu e Xaraés, sob diferentes níveis de sombreamento. Utilizou-se delineamento em blocos casualizados com esquema de parcelas subdivididas, considerando os níveis de sombreamento (0, 50, 70%) como parcela e as espécies ou cultivares como subparcelas. Sementes das gramíneas

Janaina Azevedo Martuscello; Liana Jank; Miguel Marques Gontijo Neto; Valdemir Antônio Laura; Daniel de Noronha Figueiredo Vieira Cunha

2009-01-01

317

Resistencia a la flexión de vigas laminadas con tres especies de madera tropical mexicana  

Microsoft Academic Search

La madera aserrada tiene un comportamiento estructural adecuado; sin embargo, hay factores que influyen negativamente en su uso; tales como, los defectos anatómicos, la escasez de piezas grandes y la extracción de volúmenes insuficientes. Para subsanar estas limitaciones, se puede considerar como alternativa la fabricación de vigas laminadas, las cuales se forman con láminas de madera pegadas con algún tipo

Artículo de Investigación; Omar Araujo Molina; Miguel Cerón Cardeña; Mario Chan Martín; Manuel Azueta García

2005-01-01

318

VARIABILIDAD ESPACIAL DE PROPIEDADES HIDRAULICAS Y ELEMENTOS TRAZA EN SUELOS AFECTADOS POR EL VERTIDO DE AZNALCOLLAR SOMETIDOS A RECUPERACION  

Microsoft Academic Search

RESUMEN. Después del accidente minero de Aznalcóllar (25\\/04\\/98) se llevaron a cabo las labores de recuperación de los suelos, consistentes en: a) la remoción de los lodos depositados sobre la superficie de los mismos, así como de una capa de suelo contaminado de hasta 20 cm de profundidad, y b) la aplicación de enmiendas. Como consecuencia de estas labores, quedaron

F. Moreno; I. F. Girón; F. Cabrera

319

Psicologia e bioética: diálogos  

Microsoft Academic Search

RESUMO O presente artigo discute questões acerca das intersecções entre a psicologia e a bioética. Muitos dos dilemas envolvendo a psicologia já são enfrentados por profissionais que atuam na saúde. Porém há aspectos teóricos importantes a serem considerados no estudo da psi- cologia hoje, como os dilemas morais comuns ao desenvolvimento humano em meio aos avanços tecnológicos tais como reprodução

Hericka Zogbi Jorge Dias; Gabriel José Chittó Gauer; Rachel Rubin; Alessandro Valério Dias

2007-01-01

320

Atrapar  

NSDL National Science Digital Library

En este juego de cartas los jugadores practican suma, razonar y lógica al mismo tiempo que buscan grupos de cartas que sumen 10 (como por ejemplo 5, 4 y 1). Incluye una variante más difícil. Disponible como página web, en archivo pdf, y en Inglés.

Terc

2010-01-01

321

Eating disorders prevention based on visual literacy and psycho-education: a preliminar study  

Microsoft Academic Search

RESUMEN El presente estudio tuvo como objetivo evaluar dos programas de prevención primaria de trastor- nos alimentarios, uno de ellos basado en la formación de audiencias críticas hacia la publicidad televisiva y el otro en una estrategia psicoeducativa, en diecinueve adolescentes mujeres estu- diantes de primero de secundaria. La selección de las muestras fue intencional, considerándose como criterio de inclusión

Rosalía Rodríguez de Elías; Gilda Gómez Peresmitré

2007-01-01

322

Síntesis y caracterización de materiales híbridos orgánico-inorgánicos de APS\\/PDMS  

Microsoft Academic Search

El uso de 3-aminopropiltrietoxi silano (APS) como precursor inorgánico en la síntesis de materiales híbridos, en sustitución de otros alcóxidos tradicionales como el tetraetilortosilicato (TEOS), abre la posibilidad de incorporar grupos amino reacti- vos en la red tridimensional. Estos grupos pueden ser utilizados para anclar diferentes compuestos orgánicos al material. Por otro lado, la rápida velocidad de hidrólisis del APS,

I. GARCÍA-PERULERO; S. MURCIA-MASCARÓS; J. RUBIO; J. L. OTEO

323

MODELO MATEMÁTICO PARA ESTIMAR EL ESPACIAMIENTO ENTRE DRENES SUBTERRÁNEOS EN RÉGIMEN TRANSITORIO Mathematical Model for Estimating Spacing Between Subterranean Drains in Transitory Regime  

Microsoft Academic Search

Para el diseño de sistemas de drenaje subterráneo existen diferentes modelos, tanto para régimen permanente, como transitorio; sin embargo, la mayoría de ellos no se han obtenido para condiciones de suelo y clima semiáridas. Por lo tanto, este trabajo tuvo como objetivo desarrollar una ecuación empírica para régimen transitorio que permitiera determinar el espaciamiento entre drenes paralelos, considerando los intervalos

Pablo Miguel Coras-Merino

2006-01-01

324

On Language, Mathematical Concepts and the Scientific Discourse  

Microsoft Academic Search

Resumo: Os conceitos matemáticos, fundamentais em todo processo de interação da Matemática com outras ciências, como a Física, a Filosofia, a Lógica e as Ciências Econômicas, guardam as chaves para a compreensão de suas estruturas e teorias, bem como para a compreensão do discurso matemático e, de modo mais amplo, para a compreensão do discurso científico. Neste trabalho refletimos sobre

Tadeu Fernandes de Carvalho

325

Recubrimientos sol-gel obtenidos por deposición electroforética (EPd) sobre metales  

Microsoft Academic Search

El proceso sol-gel es un método de gran interés para la producción de películas vítreas sobre metales, que actúan como barrera protectora frente a la oxidación y aumentan su resistencia a la corrosión. Se han obtenido recubrimientos inorgánicos e híbridos de distintas composiciones sobre distintos metales usando técnicas como inmersión, centrifugado y pulverización. Aunque estos métodos proporcionan recubrimientos con buenas

B. FERRARI; R. MORENO; A. dURÁN

326

MULHER: DA DOMINAÇÃO À AUTONOMIA DO CORPO  

Microsoft Academic Search

O objetivo principal deste trabalho foi analisar o termo de consentimento para laqueadura de trompas perante a autonomia do corpo da mulher analisando-se os princípios e garantias constitucionais conseguidos a duras penas ao longo de muitos anos. Teve como método uma pesquisa bibliográfica envolvendo legislação e Doutrina, bem como contato direto com instituições e profissionais habilitados na área da saúde

Marcelo Nunes Apolinário; Carmen Liliam Rodrigues Arnoni

2007-01-01

327

emancipação CIDADANIA FEMININA: UM LONGO E TORTUOSO CAMINHO  

Microsoft Academic Search

RESUMO: O presente trabalho tem a finalidade de discutir a questão da cidadania no contexto de gênero no feminino, diante do Estado e de uma sociedade que têm como princípios um viés masculino, que implica múltiplas exclusões além do privado - como excluir as mulheres dos aspectos políticos, sociais e econômicos - , limitações e privações políticas, econômicas e sociais.

Walfrido Nunes de Menezes

328

As relações da Revista Estudos Feministas com os movimentos de mulheres  

Microsoft Academic Search

R R R R Resumo esumo esumo esumo esumo: Este artigo tem como objetivo refletir sobre o diálogo da REF, nesses últimos 15 anos, com os movimentos de mulheres no Brasil. Recupera os temas dos diversos dossiês que, em grande medida, focaram temáticas de extrema relevância e atualidade para a agenda política do feminismo. Resgata alguns desses dossiês como exemplos

Leila Linhares Barsted

2008-01-01

329

Mulheres \\  

Microsoft Academic Search

Na virada do século XIX para o XX, o problema dos crimes sexuais transformou-se numa das maiores preocupações das autoridades públicas brasileiras. Vistos como uma das faces negativas do estágio de evolução da civilização ocidental, explicados enfaticamente como produtos da dissolução dos costumes resultante de \\

Carlos Martins Júnior

330

Associação movimento solidário colméia : um espaço para o resgate da cidadania das mulheres  

Microsoft Academic Search

Este trabalho tem como objetivo apresentar dados de uma investigação que o Grupo de Pesquisa Sexualidade e Escola (GESE) da Fundação Universidade Federal do Rio Grande (FURG) vem realizando junto às integrantes da Associação Movimento Solidário Colméia. Foram realizados vários encontros que funcionaram como um espaço narrativo em que as mulheres participaram ouvindo, contando e contrapondo histórias e fatos de

Guiomar Freitas Soares

2008-01-01

331

Un Sistema de Control de Acceso para la Distribución de Contenidos Multimedia  

Microsoft Academic Search

La distribución de contenidos multimedia ha surgido como un nuevo mercado en expansión ofrecido por los proveedores de red, definiendo in- fraestructuras de acceso a los recursos capaces de soportar tanto accesos inalám- bricos como mediante cableado. Aunque estas infraestructuras han sido amplia- mente estudiadas en los últimos años, el principal objetivo de estos trabajos estaba centrado más en el

M. Sánchez; G. López; O. Cánovas; J. A. Sánchez; A. F. Gómez-Skarmeta

332

FORMAÇÃO, DOCÊNCIA E ENSINO DE ARTE: SITUAÇÕES PERCEBIDAS NO ESTÁGIO CURRICULAR  

Microsoft Academic Search

Resumo: O texto discute questões relacionadas à formação inicial no curso de licenciatura em Artes Visuais na Faculdade de Artes do Paraná, focando-se nas percepções das alunas sobre as aulas de arte nos espaços escolares e seus estágios curriculares. Entende-se a formação inicial como parte do processo de profissionalização, na qual é possível perceber a maneira como os alunos pensam

Sônia Tramujas Vasconcellos

333

Gestión para el desarrollo local sostenible en Granjas Agroindustriales y Empresas Azucareras del MINAZ de la provincia de Cienfuegos  

Microsoft Academic Search

La investigación se realizó en las entidades del MINAZ, teniendo como título: “Gestión para el desarrollo local sostenible en Granjas Agroindustriales y Empresas Azucareras del MINAZ en la provincia de Cienfuegos”. Tiene como objetivo general proponer un sistema de gestión ambiental integral que permita valorar e implantar las políticas de desarrollo local sostenible de las granjas agroindustriales y empresas azucareras

Eduardo Julio López Bastida; Mileisy Balbis Morejón

2008-01-01

334

Contribución a los sistemas integrados de gestión desde la perspectiva del directivo  

Microsoft Academic Search

El presente artículo tiene como objetivo mostrar una propuesta de un modelo y procedimiento para la implantación de un sistema integrado de gestión. Sustenta el marco teórico referencial de esta investigación, el análisis realizado de los criterios de algunos autores sobre el concepto de integración y sistema integrado de gestión (SIG), así como en las concepciones teóricas actuales sobre algunas

Elizabeth Guilarte Barinaga

2011-01-01

335

A CLONAGEM HUMANA NUMA NOVA GRAMÁTICA CONSTITUCIONAL: A APLICABILIDADE PRÁTICA DO PRINCÍPIO DA DIGNIDADE HUMANA  

Microsoft Academic Search

Tendo em vista os recentes avanços da ciência, sobretudo na área de manipulação genética, a questão da clonagem humana surge como um dos grandes desafios a ser encarado. Nesse trabalho buscamos fazer uma análise não só jurídica, mas também técnica, ética e moral do tema, tendo como ponto de partida um estudo sobre a Bioética, passando pelo surgimento do Biodireito

Bernardo Abreu de Medeiros

336

Um Novo Método de Dimensionamento de Reforços de Pavimentos Flexíveis Considerando a Reflexão de Fendas  

Microsoft Academic Search

RESUMO No presente trabalho é proposto um método de dimensionamento de reforços de pavimentos flexíveis, considerando como critérios de ruína o aparecimento de fendas à superfície da camada de desgaste, resultantes da reflexão do fendilhamento existente nas camadas betuminosas do pavimento existente, bem como o fendilhamento por fadiga. O método proposto baseia-se no dimensionamento estrutural corrente, acrescido duma verificação do

Jorge C. Pais; Paulo A. A. Pereira

2000-01-01

337

III CONGRESO INTERNACIONAL DE SINESTESIA, CIENCIA Y ARTE SINESTESIA Y CREATIVIDAD ARTIFICIAL  

Microsoft Academic Search

En este artículo se propone un modelo cognitivo de Creatividad Artificial, planteando la sinestesia como pilar fundamental de dicho modelo. Para ello mostraremos en primer lugar las relaciones entre sinestesia, lenguaje, metáfora y creatividad. Veremos como la sinestesia es común a todos los humanos a través de dos vías (experimentos realizados con poblaciones normales y mediante un análisis de la

Eurídice Cabañes Martínez

338

UN HERMANO DEL PADRE ANTONIO SOLER, FAGOTISTA DE LA REAL CAPILLA MADRILEÑA  

Microsoft Academic Search

El P. Antonio Soler tuvo al menos un hermano que también era músico y compositor: Mateo Soler, que actuó como fagotista de la Real Capilla en Madrid de 1780 a 1799, año en que murió. Damos cuenta de los pormenores biográficos tanto familiares como profesionales que hemos podido averiguar sobre este músico olvidado, del que incluso se conserva una sonata

Guy Bourligueux

1985-01-01

339

Asociación entre el virus XMRV y enfermedades humanas: preguntas y respuestas  

Cancer.gov

El XMRV es un retrovirus del que se informó por primera vez en 2006 como una causa potencial del cáncer de próstata. Está estrechamente relacionado con los virus de leucemia murina, los cuales causan una amplia variedad de cánceres así como enfermedades inmunológicas y neurológicas en ratones.

340

Incontinencia fecal funcional en niños  

Microsoft Academic Search

ResumenLa incontinencia fecal se define como la evacuación de deposiciones fecales en un lugar inadecuado. Este molesto síntoma es el origen de malestar y turbación considerables tanto para el niño o niña como para su familia. La incontinencia fecal pediátrica puede dividirse en dos categorías principales: (1) Incontinencia fecal orgánica resultante, por ejemplo, de malformaciones anorrectales o anomalías neurógenas; (2)

Marloes E. J. Bongers; Marc A. Benninga

2007-01-01

341

Logística inversa, un enfoque con responsabilidad social empresarial  

Microsoft Academic Search

resumen el presente artículo tiene como objetivo realizar un análisis de la relación entre la logística inversa y la responsabilidad social como estrategia para reducir los impactos en el medio ambiente y aumentar los beneficios sociales y la seguridad en los empleados, clientes y comunidad. para alcanzar los objetivos, se consideran los temas de logística inversa y responsabilidad social desde

Rodrigo Andrés Gómez Montoya; Alexander Alberto Correa Espinal; Laura Sofía Vásquez Herrera

2012-01-01

342

Chômage des jeunes et fonctionnement du marché du travail : les cas français et suédois  

Microsoft Academic Search

[spa] Desocupación de los jóvenes y funcionamiento del mercado laboral : el caso francés y el sueco - En Francia como en Suecia, el desempleo de los jóvenes de menos de 25 años aumentó como consecuencia de los choques macroeconómicos de los años setenta y ochenta. No obstante, este choque ha sido mucho más fuerte en Francia y ha sido

Yves Bourdet; Inga Persson

1991-01-01

343

O CLIMATÉRIO E SUA RELAÇÃO COM A SAÚDE E O AMBIENTE DE TRABALHO The Climacterium and its relation to health and work environment  

Microsoft Academic Search

RESUMO O período do climatério é caracterizado por sinais e sintomas que podem repercutir de algum modo na vida de mulheres, tanto do ponto de vista familiar como profissional. Este estudo teve como objetivo analisar as interferências dos problemas vivenciados pela mulher no climatério e suas relações com a saúde e o ambiente de trabalho. Tratou-se de uma pesquisa exploratória-descritiva

Sandra Mar; Brasil Soares; Ana Maria Fontenelle Catri; Raimunda Magalhães da Silva; Mirna Albuquerque Frota

344

O telescópio remoto do Observatório Abrahão de Moraes - Obelix  

Microsoft Academic Search

Foi desenvolvido um telescópio totalmente automático situado no Observatório Abrahão de Moraes, em Valinhos-SP, que possibilita observações remotas via Internet tanto para fins profissionais como didáticos. Usando um programa navegador da WWW, o observador tem acesso a páginas interativas que permitem não só apontar o telescópio e receber as imagens, como também controlar a abertura e o fechamento da cúpula,

N. L. Neres; J. C. Raffaelli; G. A. Medina Tanco; J. E. Horvath; R. Maluhy; A. Martins; M. I. V. Orselli

2003-01-01

345

Múltiples estados de desorden en el etanol sólido  

NASA Astrophysics Data System (ADS)

El diagrama de fases del etanol por debajo de los 169 K será presentado. Se mostrará que el etanol puede solidificarse en tres fases con diversos niveles de desorden,(como un vidrio(G), como un vidrio orientacional (OG) y como un cristal de fase rotora (RP)) además de en una fase totalmente cristalina. Las estructuras de estas tres fases serán presentadas tal y como se deducen a partir de diversas medidas de difracción de neutrones al igual que las proporciones de los isómeros de dicho material en las fases desordenadas y se compararán con los resultados de la fase cristalina y del líquido superenfriado. Igualmente diversas medidas sobre su dinámica serán presentadas, tanto de dispersión de neutrones, como de capacidad calorífica y de medidas dieléctricas y comparadas con modelos teóricos y simulaciones para tratar de explicar los procesos de relajación observados y las transiciones entre las diversas fases.

Fernández-Perea, R.

346

Evolution of the Active Phase of CoMo/Al2O3 Catalysts under Industrial Conditions: a High-Pressure MES Study  

SciTech Connect

The behavior of CoMo/Al2O3 catalysts sulfided in H2S/H2 gas mixture, under industrial conditions, was investigated using Moessbauer emission spectroscopy (MES). An intermediate Co-Mo phase is formed after increasing the sulfidation pressure to 4 MPa, favoring the Co-Mo-S phase formation. An increase in the quadrupole splitting value of the Co-sulfide species after treatment at 573 K is proposed as a prerequisite for the formation of ideal Co-Mo-S structures.

Dugulan, A.I.; Overweg, A.R.; Craje, M.W.J.; Kearley, G.J. [Interfaculty Reactor Institute, Delft University of Technology, 2629 JB Delft (Netherlands)

2005-04-26

347

Estudio teórico de la desorción de Na y K de SiO2 estimulada por la acción de fotones o electrones  

NASA Astrophysics Data System (ADS)

Se ha estudiado el mecanismo de generación de sodio y potasio atómico a partir de muestras de SiO2 utilizando cálculos basados tanto en la teoría del funcional de la densidad como en métodos post-Hartree Fock, así como en el método de cluster para modelar el sólido. Como consecuencia del estudio se han propuesto distintos caminos posibles para la desorción, estimulada por la acción de fotones o electrones, de sodio y potasio desde el óxido de silicio, proporcionando por lo tanto una explicación a la atmósfera tenue de sodio y potasio de La Luna.

Domínguez Ariza, D.; López, N.; Illas, F.; Pacchioni, G.; Madey, T. E.

348

Stress - Multiple Languages: MedlinePlus  

MedlinePLUS

... Hindi (??????) Japanese (???) Korean (???) Portuguese (português) Russian (???????) Somali (af Soomaali) Spanish (español) Tagalog ( ... PDF Health Information Translations Return to top Portuguese (português) Coping with Stress Como lidar com o estresse - ...

349

Quitting Smoking - Multiple Languages: MedlinePlus  

MedlinePLUS

... Hmoob) Japanese (???) Khmer (Khmer) Korean (???) Portuguese (português) Russian (???????) Somali (af Soomaali) Spanish (español) Tagalog ( ... PDF Health Information Translations Return to top Portuguese (português) How to Quit Smoking Como parar de fumar - ...

350

Instantánea del cáncer de esófago  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de esófago; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

351

Instantánea del cáncer de próstata  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de próstata; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

352

Instantánea del cáncer de estómago  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de estómago; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

353

Instantánea de los cánceres de hígado y de las vías biliares  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cánceres de hígado y de las vías biliares; así como ejemplos de actividades del NCI y adelantos en la investigación de estos tipos de cáncer.

354

Fever - Multiple Languages: MedlinePlus  

MedlinePLUS

... ????) French (français) Japanese (???) Korean (???) Portuguese (português) Russian (???????) Somali (af Soomaali) Spanish (español) Tagalog ( ... PDF Health Information Translations Return to top Portuguese (português) Taking a Temperature Como medir a temperatura - português ( ...

355

Control del dolor: Apoyo para las personas con cáncer  

Cancer.gov

Libro sobre el control del dolor en pacientes con cáncer. Cubre los métodos y medicinas, así como los efectos físicos y emocionales del dolor. Es una adaptación cultural para el público de habla hispana del libro en inglés Pain Control.

356

Design and synthesis of metal sulfide catalysts supported on zeolite nanofiber bundles with unprecedented hydrodesulfurization activities.  

PubMed

Developing highly active hydrodesulfurization (HDS) catalysts is of great importance for producing ultraclean fuel. Herein we report on crystalline mordenite nanofibers (NB-MOR) with a bundle structure containing parallel mesopore channels. After the introduction of cobalt and molybdenum (CoMo) species into the mesopores and micropores of NB-MOR, the NB-MOR-supported CoMo catalyst (CoMo/NB-MOR) exhibited an unprecedented high activity (99.1%) as well as very good catalyst life in the HDS of 4,6-dimethyldibenzothiophene compared with a conventional ?-alumina-supported CoMo catalyst (61.5%). The spillover hydrogen formed in the micropores migrates onto nearby active CoMo sites in the mesopores, which could be responsible for the great enhancement of the HDS activity. PMID:23895581

Tang, Tiandi; Zhang, Lei; Fu, Wenqian; Ma, Yuli; Xu, Jin; Jiang, Jun; Fang, Guoyong; Xiao, Feng-Shou

2013-08-01

357

Complicaciones orales de la quimioterapia y la radioterapia a la cabeza y el cuello (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca de las complicaciones orales, como la mucositis y la disfunción de la glándula salival, que se presentan en pacientes de cáncer tratados con quimioterapia y radioterapia a la cabeza y el cuello.

358

Dolor (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca del dolor como una complicación a causa del cáncer o su tratamiento. Se discuten enfoques sobre el manejo y tratamiento del dolor relacionado con el cáncer.

359

Náuseas y vómitos (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca de las náuseas y los vómitos como complicaciones a causa del cáncer o su tratamiento. Se discuten enfoques sobre el manejo de las náuseas y los vómitos.

360

IAIISPS - PROGRAMA CIENTIFICO INICIAL (ISP)  

NSF Publications Database

... para la Investigacion del Cambio Global (IAI) es una organizacion internacional concebida como una ... bajo el ISP seran desarrolladas en consulta con el Comite Asesor Cientifico (SAC), el Director, y el ...

361

Prurito (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca del prurito (picazón de la piel) como complicación a causa del cáncer y su tratamiento. Se discuten los enfoques del manejo y tratamiento del prurito.

362

Tomografía computarizada (TC) y exploraciones para cáncer  

Cancer.gov

Hoja informativa que describe el procedimiento y la tecnología de exploraciones con tomografía computarizada así como sus usos para el diagnóstico, para exámenes de detección y para tratamiento del cáncer.

363

Instantánea del sarcoma de Kaposi  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el sarcoma de Kaposi; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

364

Cánceres poco comunes en la niñez: Tratamiento (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca del tratamiento de los cánceres poco comunes en la niñez como los cánceres de la cabeza y el cuello, el tórax, el abdomen, el aparato reproductor, la piel y otros.

365

Complicaciones gastrointestinales (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca del estreñimiento, la retención fecal, la obstrucción intestinal y la diarrea como complicaciones del cáncer o su tratamiento. Se discute el manejo de estos problemas.

366

Fatiga (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca de la fatiga, una afección caracterizada por extremo cansancio e incapacidad para funcionar por la falta de energía, que a menudo se observa como una complicación del cáncer y su tratamiento.

367

Instantánea del cáncer de tiroides  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de tiroides; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

368

Instantánea del cáncer de ovario  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de ovario; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

369

Instantánea del cáncer de cuello uterino  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de cuello uterino; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

370

Instantánea del cáncer de seno (mama)  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de seno (mama); así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

371

Instantánea del cáncer colorrectal  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer colorrectal; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

372

Instantánea de los cánceres de cabeza y cuello  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cánceres de cabeza y cuello; así como ejemplos de actividades del NCI y adelantos en la investigación de estos tipos de cáncer.

373

Instantánea del cáncer de endometrio  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de endometrio; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

374

Encontrando planetas alrededor de otras estrellas  

NASA Video Gallery

Así como la Tierra gira alrededor del Sol, la estrella más cercana, es posible que otros planetas orbiten las estrellas que se ven en el cielo nocturno. Piensa en todos los planetas del universo qu...

375

Overactive Thyroid: What You Need to Know  

MedlinePLUS

... medicinas que contienen yodo, como la amiodarona, una medicina para el corazón • tiene fi brilación auricular, un ... que lo trate. Su médico puede prescribirle una medicina llamada betabloqueador que le ayudará a sentirse mejor ...

376

Antioxidantes y prevención del cáncer  

Cancer.gov

Hoja informativa acerca de los antioxidantes, sustancias que pueden proteger las células del daño causado por moléculas inestables conocidas como radicales libres. El daño de los radicales libres puede resultar en cáncer.

377

Term Dictionary Widget Spanish  

Cancer.gov

Diccionario de cncer Definiciones fciles de entender de trminos relacionados con el cncer y la medicina. www.cancer.gov/espanol | Aclaracin Este widget proporciona contenido del Instituto Nacional del Cncer (NCI) y est disponible como

378

Delirio (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca del delirio como una complicación del cáncer o su tratamiento. Se tratan enfoques de los cuidados médicos de apoyo y los abordajes farmacológicos para el manejo del delirio.

379

Recursos en su comunidad  

Cancer.gov

Información acerca de las organizaciones que proporcionan apoyo a personas con cáncer. También incluye recursos disponibles en la comunidad, como doctores, centros de tratamiento y otros profesionales de salud.

380

Instantánea de los cánceres de cerebro y del sistema nervioso central  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cánceres de cerebro y del sistema nervioso central; así como ejemplos de actividades del NCI y adelantos en la investigación de estos tipos de cáncer.

381

Instantánea del cáncer infantil  

Cancer.gov

Información sobre la incidencia y mortalidad del cáncer en los niños, tendencias en el financiamiento del NCI para la investigación del cáncer infantil; así como ejemplos de actividades y adelantos en la investigación relevantes para esta población.

382

Instantánea del cáncer de vejiga  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de vejiga; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

383

EFECTO GENOTÓxICO DEL DICROMATO DE POTASIO EN ERITROCITOS DE SANGRE PERIFéRICA DE Oreochromis niloticus (TILAPIA)  

Microsoft Academic Search

RESUMEN Existen múltiples reportes del efecto genotóxico y cancerígeno del cromo VI, los seres humanos tenemos una permanente exposición a este elemento. Objetivos. Evidencias la genotoxicidad del dicromato de potasio utilizando como sistema biológico a Oreochromis niloticus \\

Zulita Prieto; Julio León-Incio; Carlos Quijano-Jara; Radigud Fernández; Edgardo Polo-Benites; Roger Vallejo-Rodríguez; Luis Villegas-Sanchez

384

Instantánea del cáncer de riñón  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de riñón; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

385

Cánceres poco comunes en la niñez (PDQ®)  

Cancer.gov

Resumen de información revisada por expertos acerca del tratamiento de los cánceres poco comunes en la niñez como los cánceres de la cabeza y el cuello, el tórax, el abdomen, el aparato reproductor, la piel y otros.

386

Instantánea del cáncer de páncreas  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de páncreas; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

387

Instantánea del cáncer de pulmón  

Cancer.gov

Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de pulmón; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

388

La necesidad de cohetes más veloces  

NASA Video Gallery

Los cohetes utilizados por la NASA son excelentes, pero no nos pueden llevar muy lejos ni muy rápido a aquellos lugares a los que todavía no llegamos, como Marte, o más lejos. Una solución posible ...

389

Excitação e fotoabsorção de moléculas interestelares no ultra violeta  

Microsoft Academic Search

O estudo dos processos de excitação, fotoabsorção e ionização molecular nas nuvens interestelar, permite a análise dos processos químicos, como a formação e destruição de moléculas, até mesmo daquelas que dão origem à vida. Acredita-se que as moléculas como CS2, NH3, CO2 e N2O estão presentes nas nuvens onde são formadas as estrelas e seus sistemas planetários. Estas moléculas são

A. M. F. Rodrigues; H. M. Boechat-Roberty; G. B. Souza; C. C. Turci

2003-01-01

390

TOXICIDAD DE ACEITES, ESENCIAS Y EXTRACTOS VEGETALES EN LARVAS DE MOSQUITO CULEX QUINQUEFASCIATUS SAY (DIPTERA: CULICIDAE)  

Microsoft Academic Search

Se evaluaron 51 especies de plantas del estado de Oaxaca, México; 39 como extractos acuosos al 5 y 15% y 21 al 25%, y como extractos acetónicos tres especies con cinco dosis (0.1, 0.01, 0.001, 0.0001 y 0.00001%). Además de ocho aceites vegetales a tres dosis (0.1, 0.01 y 0.001%) y 11 esencias vegetales comerciales con cuatro dosis (0.1, 0.01,

Rafael PÉREZ-PACHECO; Cesáreo RODRÍGUEZ HERNÁNDEZ; Joel LARA-REYNA; Roberto MONTES BELMONT; Gustavo RAMÍREZ VALVERDE

391

Boletín del Instituto Nacional del Cáncer - 07-20-2010  

Cancer.gov

El doctor Harold Varmus, acompañado de su esposa Constance Casey (centro), presta juramento como director del NCI ante la Secretaria del Departamento de Salud y Servicios Humanos, Kathleen Sebelius, el lunes 12 de julio. (Foto cortesía de Chris Smith) El 12 de julio, el doctor Harold Varmus prestó juramento ante la Secretaria del Departamento de Salud y Servicios Humanos de los Estados Unidos, Kathleen Sebelios, como el decimocuarto director del Instituto Nacional del Cáncer.

392

A new estimate of the negro population and negro vital rates in the united states, 1930–60  

Microsoft Academic Search

\\u000a Resumen  El análisis demogárafico de la población negra de los Estados Unidos se ha dificultado debido a que las estadísticas censales\\u000a y vitales se conocen como incompletas y sesgadas. Como resultado de un alfabetismo creciente, mayor bienestar económico y\\u000a una calidad mejor del trabajo de campo del censo con respecto a la población negra, el recuento del Censo de 1960 parece

Donald J. Bogue; Bhaskar D. Misra; D. P. Dandekar

1964-01-01

393

Radiación acústica por superficies planas: aplicación a altavoces  

Microsoft Academic Search

En los sistemas de reproducción sonora es habitual la utilización de altavoces dinámicos. Sin embargo,\\u000aen aplicaciones específicas, puede ser necesaria y\\/o conveniente la utilización de altavoces alternativos con\\u000asuperficies planas como diafragma, como los electrostáticos o los basados en la tecnología NXT© . Estos\\u000aaltavoces generan el campo acústico mediante la vibración de una superficie rectangular. Se puede suponer,

Jesús Alba Fernández; Jaime Ramis Soriano; Víctor Espinosa; Víctor Sánchez

1970-01-01

394

Raízes pós-mitológicas da Astronomia Clássica  

NASA Astrophysics Data System (ADS)

Apresentamos como a invenção de um modelo astronômico e cosmológico fundado em causas naturais foi um processo gestado num ambiente cultural específico, o do advento do pensamento pós-mitológico, que tem como sua raiz mais funda a trajetória particular da Grécia Antiga, com ênfase na resolução de uma grave crise social e a evolução do mundo clássico para o contexto espiritual de um império universal.

di Bartolo, L.; Villas da Rocha, J. F.

2004-02-01

395

CARACTERIZAÇÃO DOS ASPECTOS E IMPACTOS ECONÔMICOS, SOCIAIS E AMBIENTAIS DO SETOR SUCROALCOOLEIRO PAULISTA  

Microsoft Academic Search

O presente trabalho tem como objetivo a caracterização dos aspectos e impactos econômicos, sociais e ambientais da monocultura da cana-de-açúcar. Isso servirá para que posteriormente se possa fazer um estudo sobre os impactos que a monocultura da cana acarretará a região de Tupã\\/SP. Em sua confecção foram consultados sites governamentais, teses e dissertações como também bibliografia pertinente ao tema. Os

Rafael Pazeto Alvarenga; Timoteo Ramos Queiroz

2008-01-01

396

Extenso estudio realizado en muchos centros demuestra que hay una precisión comparable de la colonoscopia virtual con la colonoscopia convencional  

Cancer.gov

Según los resultados del Estudio Nacional de Colografía de Tomografía Computarizada de la American College of Radiology Imaging Network, ACRIN, la colografía de tomografía computarizada, también conocida como colonoscopia virtual, es comparable a la colonoscopia convencional en su capacidad para detectar con precisión cáncer y pólipos precancerosos y podría servir como examen selectivo inicial de detección de cáncer colorrectal. La colonoscopia convencional usa un tubo largo, flexible, con cámara, para ver el revestimiento del colon.

397

Use of the reverse pulse plating method to improve the properties of cobalt–molybdenum electrodeposits  

Microsoft Academic Search

Conditions leading to cobalt–molybdenum (Co–Mo) electrodeposits with high Mo percentages were studied. Deposits prepared by means of direct current electroplating showed a large amount of cracks. Maximum amount of Mo in the films was attained by applying deposition potentials in the ?1200mV to ?1300mV range. Reverse pulse plating mode has been proved useful for obtaining nanocrystalline, low stressed Co–Mo deposits

Eva Pellicer; Elvira Gómez; Elisa Vallés

2006-01-01

398

Primera aproximación a la estructura interna de Plutón  

NASA Astrophysics Data System (ADS)

En el presente trabajo se propuso estudiar la estructura interna actual del planeta Plutón. El modelo que se planteó es del tipo de estructura no-diferenciada. Se incluyó como fuente de calor interna la radioactividad y como único mecanismo de transporte de la energía a la conducción. Se encontró que el planeta estaría compuesto por una mezcla de roca (65% en masa) y hielo de agua (35%). Este simple modelo permite inferir que una estructura más realista para Plutón debería incluir también a la convección como mecanismo de transporte. Ello además permitiría avanzar de modo más firme en el estado de diferenciación del planeta, que casi seguramente sea más complejo que el adoptado.

Steren, G. A.; Carranza, G. J.; Hubbard, W. B.

399

A Visão do Universo Segundo a Concepção de um Grupo de Alunos do Ensino Médio de São Paulo  

NASA Astrophysics Data System (ADS)

Nesse trabalho foi identificada por meio de um questionário a visão de mundo sobre o Universo espaço e tempo entre 270 estudantes de Ensino Médio de três escolas de São Paulo. Constatou-se pouco conhecimento dos temas investigados sendo que apenas 20% dos alunos relacionaram as semanas com as fases da lua enquanto 28% associaram as estações do ano à inclinação do eixo de rotação da Terra e 23% tinham noções das distâncias entre objetos celestes próximos da Terra. Enquanto 56% conseguiram relacionar o Big Bang com a origem do Universo verificou-se que 37% reconheciam ano-luz como unidade de distância e 60% reconheciam o Sol como uma estrela. Apesar de 60% dos alunos indicarem a escola como principal fonte dos conhecimentos de astronomia seus conceitos ainda são inadequados havendo necessidade de aprimoramento da abordagem desses conteúdos pois apesar de popular a astronomia é veiculada de maneira pouco esclarecedora e com imprecissões.

Araújo, M. A. A.; Elias, D. C. N.; Amaral, L. H.; Araújo, M. S. T.; Voelzke, M. R.

2005-12-01

400

Occurrence of Plesiomonas shigelloides in cultured red hybrid tilapia (Oreochromis niloticus) from tropical rivers, east coast Malaysia.  

PubMed

A total of 182 isolates of Plesiomonas shigelloides were identified from 40 healthy red hybrid tilapia, Oreochromis niloticus cultured at two important rivers in Terengganu, Malaysia namely Como River and Terengganu River from east coast Malaysia. P. shigelloides count in Digestive Tract Content (DTC) and Muscle (MUS) of red hybrid tilapia cultured at Terengganu River was 1000-fold higher than Como River. Antibiotic susceptibility test was also performed on Plesiomonas shigelloides isolates. The incidence of antibiotic resistance was higher in Plesiomonas shigelloides isolated from red hybrid tilapia cultured at Terengganu River compared to Como river. Thus, the findings of the study indicate that P. shigelloides from tilapia muscle and an intestine could be an alarming for serious public health risk to consumers. PMID:24191623

Nadirah, M; Ruhil, H H; Jalal, K C A; Najiah, M

2012-06-15

401

Distribución del continuo ultravioleta e infrarrojo en estrellas Be  

NASA Astrophysics Data System (ADS)

Estamos interesados en interpretar los excesos de flujo infrarrojo y/o ultravioleta observados en estrellas Be con respecto al de estrellas B normales, así como su posible correlación. Una envoltura rodeando la estrella distingue una estrella Be de una B normal; para explicar las observaciones es necesario entonces tener en cuenta todos los posibles procesos físicos que en ella tienen lugar. Adoptando un modelo atmosférico específico, hemos estudiado el proceso de recombinación dielectrónica de metales como MgII y FeII, teniendo en cuenta la posible influencia de la opacidad del medio en el flujo emitido.

Cruzado, A.; Ringuelet, A.; di Rocco, H.

402

El consumo de tabaco y la exposición al humo de tabaco en el ambiente durante el embarazo pueden poner en peligro la salud de mujeres y niños en países en desarrollo  

Cancer.gov

Las conclusiones de un estudio del NIH indican que las tasas de consumo de tabaco durante el embarazo, así como la exposición de mujeres embarazadas y de sus niños al humo de tabaco en el ambiente constituyen amenazas significativas para la salud en varios países de ingresos medios y bajos. En unos pocos de los países en donde se tomaron las muestras, incluso algunos de América Latina, los índices de exposición al humo de tabaco probablemente ya son lo suficientemente altos como para justificar una preocupación considerable.

403

Identificación y fortalecimieto de centralidades urbanas: El caso de Quito  

Microsoft Academic Search

Muchas ciudades latinoamericanas experimentan un crecimiento territorial desbalanceado en el que coexisten áreas muy dinámicas con otras fuertemente rezagadas en términos sociales y económicos, habitualmente localizadas en la periferia urbana. Ese desbalance se refleja en un suministro de servicios, empleos, áreas verdes, espacios públicos y comunales, así como en usos de suelo, que son muy desiguales para diferentes áreas de

Fernando Cuenin; Mauricio Silva

2010-01-01

404

QUALIDADE AMBIENTAL (?) EM ÁREAS DE EXPANSÃO URBANA: UM ESTUDO DE CASO SOBRE A PERDA DA COBERTURA VEGETAL DO BAIRRO PARQUE VERDE - BELÉM\\/PA  

Microsoft Academic Search

O crescimento acelerado das cidades acarretou sérios prejuízos à qualidade ambiental das áreas de expansão urbana, pois a ocupação urbana desordenada configurada nestes espaços substituiu de forma degradante o espaço natural transformando-o em espaço construído sem qualquer planejamento urbano que levasse em conta a vegetação como componente essencial da qualidade de vida humana. Dentro deste contexto, o bairro Parque Verde,

CIÊNCIA EDUCAÇÃO; SUELLEN CRISTINA; VIDAL COSTA; NÍVIA BERNA DA SILVEIRA CORRÊA

405

Identificação dos vegetais destinados a ornamentação de praças, parques e creches em Campina Grande, PB  

Microsoft Academic Search

RESUMO O Horto Florestal Lauro Pires Xavier, situado às margens do açude de Bodocongó, em Campina Grande-PB é uma importante unidade mantida pela prefeitura no sentido de preservação e conservação de espécies. Através do viveiro, o município tem condição de aumentar as áreas verdes, proporcionando lazer e bem estar à população. Esse trabalho tem como tema à identificação dos vegetais

Mário Luiz Farias Cavalcanti; Ivan Coelho Dantas; Giselle Medeiros da Costa Silva; Luciana de Luna Costa; Maria José Benício Barros; Ronny Soffiantini Lira

406

Valoración de impactos socio- ambientales del arbolado urbano: una aplicación a la ciudad de Santiago, Chile  

Microsoft Academic Search

Santiago de Chile es tercero en la lista de ciudades más contaminadas de Latinoamérica, después de Ciudad de México y Sao Paulo, por lo cual la valoración ambiental y social del arbolado urbano en este contexto es de vital importancia. Los proyectos de arbolado urbano ya sea en calles, plazas, parques u otras áreas verdes tienen como propósito, por una

Carmen L. De la Maz; Claudia L. Cerd

2009-01-01

407

Políticas de vivienda social en el Gran Santiago: proletarización de los sectores populares urbanos  

Microsoft Academic Search

La sumatoria de los procesos productivos, migraciones y pobreza que ha afectado a Santiago de Chile durante el siglo XX ha configurado un cuadro de déficit de viviendas entre los sectores populares como consecuencia del fuerte crecimiento poblacional, la falta de infraestructura urbana y la inestabilidad laboral de los sectores más desposeídos. Es en la segunda mitad del siglo citado

Rodrigo Rocha Pérez; Patricio Antilef Osorio; José Villarroel de la Sotta

2007-01-01

408

EL TRASPATIO UN RECURSO LOCAL EN LOS SERVICIOS DE “TURISMO RURAL FAMILIAR” ALTERNATIVA DE DESARROLLO SUSTENTABLE MUNICIPAL - CASO: SAN CARLOS, TAMAULIPAS, MÈXICO  

Microsoft Academic Search

Al turismo rural familiar, se le considera como alternativa de bienestar local y regional. Es un mecanismo de difusión de la riqueza natural y cultural del municipio a través de actividades cotidianas y fuente de ingresos a través de la prestación de servicios. Permite a los habitantes de la comunidad mejorar su nivel y calidad de vida, fortaleciendo a la

María Cecilia Montemayor Marín; Pedro Carlos Estrada Bellmann; Jane M. Packard; Eduardo Javier Treviño Garza; Horacio Villaón Mendoza

2007-01-01

409

Organismos genéticamente modificados: su impacto socioeconómico en la agricultura de los países de la Comunidad Andina, Mercosur y Chile  

Microsoft Academic Search

El desarrollo de la agro-biotecnología basada en la manipulación genética permite producir variedades de cultivos agrícolas más resistentes a plagas y enfermedades y en general, promete incorporar características deseadas, tales como resistencia a sequía y heladas y mejores cualidades nutritivas. Varios estudios sugieren que la rápida difusión e implementación de los Organismos Genéticamente Modificados (OGM) o de cultivos transgénicos en

Marianne Schaper; Soledad Parada

2001-01-01

410

El comercio de los productos transgénicos: el estado del debate internacional  

Microsoft Academic Search

Los productos transgénicos mezclan aspectos contradictorios. La manipulación genética de cultivos permite desarrollar tanto productos con toxinas insecticidas, disminuyendo el uso de defensivos agrícolas que pueden dañar el medio ambiente, como alimentos con propiedades vitamínicas y proteicas, que pueden mejorar los indicadores sociales en los países en desa- rrollo. Por otra parte, se han abierto interrogantes acerca de los posibles

María Angélica Larach; División de Comercio Internacional

411

Sintomas Depressivos e Qualidade de Vida em Indivíduos com Epilepsia por Esclerose Mesial Temporal  

Microsoft Academic Search

RESUMO Introdução: Dificuldades no trabalho, em relacionamentos interpessoais, familiares e sociais, a percepção do estigma, da discriminação dentre outros têm sido associados aos estados depressivos interictais, influen- ciando negativamente a qualidade de vida (QV) das pessoas com epilepsia. A depressão tem alta prevalência (20 a 55%) nas epilepsias, sendo vista como o fator mais importante no julgamento do paciente sobre

Neide Barreira Alonso; Tatiana Indelicato da Silva; Ana Carolina Westphal; Auro Mauro Azevedo

412

Avaliação urodinâmica do homem com obstrução não neurogênica do trato urinário inferior Urodynamic evaluation of the male with nonneurogenic lower urinary tract obstruction  

Microsoft Academic Search

SINOPSE O desenvolvimento de métodos para uma avaliação objetiva do fluxo miccional mas- culino tem levado a uma revisão de muitos conceitos pré existentes. A urofluxometria é um método diagnóstico amplamente utilizado como teste de rastreamento da obstrução do fluxo vesical. Este seria usado rotineiramente para avaliar pacientes masculinos e evitar o super diagnóstico de obstrução do colo vesical e

Míriam Dambros

413

Percepción de las redes sociales en la escuela: colegio Felipe Palazon (Tarija – Bolivia)  

Microsoft Academic Search

No hay duda que desde hace mucho las tecnologías de la información y comunicación, asi como internet, tienen un crecimiento exponencial sin límites en todo el mundo, por las múltiples aplicaciones, y aporte en todos los ámbitos profesionales, lo mismo ocurre con el fenómeno de las redes sociales. En Bolivia y, específicamente en la ciudad de Tarija, siguen esta tendencia;

Carmelo Branimir España Villegas

2011-01-01

414

Hígado Graso no Alcohólico: una entidad cada vez más frecuente y de pronóstico incierto  

Microsoft Academic Search

RESUMEN La enfermedad de hígado graso no alcohólica, en inglés non alcoholic fatty liver disease (NAFLD), es definida como una acumulación excesiva de grasa en los hepatocitos. Presenta una prevalencia mundial de alrededor del 15 al 25%. Los factores de riesgo asociados frecuentemente a NAFLD son obesidad, diabetes tipo 2 y dislipemia. Por un lado se ha propuesto que una

Andrea Mariel Actis

415

I-121 - CINÉTICA QUÍMICA E FUNDAMENTOS DOS PROCESSOS DE NITRIFICAÇÃO E DENITRIFICAÇÃO BIOLÓGICA  

Microsoft Academic Search

RESUMO A demanda crescente dos usos das águas naturais tem gerado necessidades crescentes de processos efetivos no tratamentos de efluentes líquidos, e estratégias de gerenciamento dos recursos naturais. As tecnologias disponíveis para o controle do nitrogênio em efluentes industriais e domésticos têm se tornado uma poderosa ferramenta tanto para a correta disposição de efluentes, como para o gerenciamento das águas.

Eduardo S. Ferreira

416

Extração de amônio de filtros de amostragem, coleta e determinação pelo método da gota suspensa  

Microsoft Academic Search

RESUMO: A amostragem de amônia no ar é feita usualmente com filtro impregnado com ácido. O ácido ascórbico, quando usado como impregnante, é facilmente oxidado em meio básico e aquoso, gerando uma solução fortemente colorida que inviabiliza a determinação por colorimetria. Este trabalho apresenta um novo procedimento para extração do íon amônio dos filtros de amostragem, transferindo o íon amônio

Alexandre FRANCO; Arnaldo Alves CARDOSO; Andrew G. ALLEN

2000-01-01

417

Blanqueo de capitales y lavado de dinero: su concepto, historia y aspectos operativos  

Microsoft Academic Search

Hoy en día el lavado o reciclaje de dinero es percibido por la comunidad internacional como uno de los principales problemas, frente al cual la actividad criminal ocupa la atención de todas las autoridades relacionadas con el tema. Los países son conscientes de la difícil situación de establecer un criterio uniforme precisamente porque las realidades de cada nación son diversas

Bruno Tondini

418

Efectos colaterales de un reparto insostenible de recursos  

Microsoft Academic Search

El ser humano, como cualquier otro organismo, posee la capacidad de modificar su entorno para su propio beneficio, especialmente de cara a asegurar su manutención y la de aquellos a su cargo. Con el desarrollo tecnológico esa capacidad ha adquirido dimensiones sin precedentes para el entorno que nos sustenta, con consecuencias difíciles de estimar y menos aun de predecir, que

Marta I. Saloña Bordas

2006-01-01

419

EL ESTADO EN LOS MONTES DE MARIA  

Microsoft Academic Search

Se pretende en el presente trabajo, mostrar las carcatristicas que presenta el Estado en los Montes de María (1) (departamentos de Sucre y Bolívar, republica de Colombia), en el cual se resalta la naturaleza mafiosa y politiquera de un Estado que ya no existe como tal y que se ha convertido en feudos de la politiquería local. Igualmente, se hace

Daniel Menco Rivera

2009-01-01

420

Another Mexico  

ERIC Educational Resources Information Center

A Mexican saying holds that "Como Mexico no hay dos"--There is only one Mexico. American media these days interpret that notion with a vengeance. Story after story depicts a country overrun by out-of-control drug wars and murder, where corrupt police officers trip over beheaded victims more often than they nab perpetrators. South of the border, a…

Romano, Carlin

2009-01-01

421

Estudio estructural de membranas cyclopore de microfiltración  

Microsoft Academic Search

La Microscopía de Fuerza Atómica (AFM), de reciente desarrollo, se ha revelado como una técnica especialmente valiosa en la caracterización de todo tipo de superficies y materiales. En este trabajo se ha utilizado dicha técnica en la caracterización super- ficial de diversos filtros de microfiltración, obtenidos por el método de revelado de trazas nucleares, y en consecuencia, especial- mente útiles

J. I. CALVO; L. PALACIO; P. PRÁDANOS; A. MARtíN; Y A. HERNÁNDEZ

422

Fauna associada a esponja Cliona varians (Porífera, Desmoespongiae) Fauna associated with the sponge Cliona varians (Porífera, Desmoespongiae)  

Microsoft Academic Search

Resumo Devido ao espaço se constituir em recurso limitante para colonização, substratos biológicos como esponjas proporcionam importantes microhabitats complementares para ocupação. O objetivo deste trabalho foi ampliar o conhecimento atual sobre a fauna associada à esponja Cliona varians, portanto, mergulhos livres foram realizados na Pedra da Sereia (Praia da Costa) para coletar amostras da esponja. Um total de 558 indivíduos

Camila B Stofel; Gabriela C Canton; Lázaro AS Antunes; Frederico J Eutrópio

423

EL PARADIGMA DE LOS DELITOS DE TERRORISMO ENTRE DERECHO INTERNO Y DERECHO INTERNACIONAL  

Microsoft Academic Search

El artículo busca establecer un panorama entre los delitos de terrorismo desde su surgimiento hasta los días de hoy, teniendo en cuenta el desarrollo entre las aquí clasificadas fases evolutivas del fenómeno terrorista, llegando por fin a la última etapa, el terrorismo hoy que si conoce como, antes y después de los atentados de 11 de septiembre. Frente a esto

Ignácio Nunes Fernandes

2011-01-01

424

Los medios de comunicación y las violaciones de los derechos humanos en el área de conflicto  

Microsoft Academic Search

La autora, que actualmente es una refugiada política en Austria, relata su trabajo como periodista palestina en las áreas conflictivas de Israel. Sus experiencias revelan las violaciones de Derechos Humanos y el genocidio cometido por las fuerzas armadas israelíes. Este artículo no sólo condena al estado de Israel sino que también cuestiona la falta de compromiso de los Estados Unidos

Kawther Salam

2006-01-01

425

Características del desplazamiento forzado en Colombia  

Microsoft Academic Search

RESUMEN El presente estudio es una contribución a la explicación y comprensión de la problemática del desplazamiento forzado interno en Colombia, fenómeno considerado como violación masiva y múltiple de los derechos humanos, circunstancia de lesa humanidad además de ser infracción grave del Derecho Internacional Humanitario. Se identificaron los antecedentes históricos, la dinámica regional del fenómeno, la existencia de factores estructurales

Henry Fernández Pinto; JIMMY SÁNCHEZ REYEZ

2011-01-01

426

Estudiar economía y racionalidad: Un experimento  

Microsoft Academic Search

En este documento se lleva a cabo el mismo experimento realizado por Harbaugh et al. (2001) usando como sujetos en el experimento a estudiantes de economía, ciencias políticas y medicina, quienes tienen una fuerte, mediana y nula formación en economía. El objetivo es encontrar violaciones al axioma débil de preferencia revelada (ADPR) y medir la magnitud de las violaciones mediante

Rodrigo Taborda

2003-01-01

427

Violación del Principio de Equivalencia en Teorías con Dilatón de Cuerdas  

Microsoft Academic Search

Se estudian las violaciones al Principio de Equivalencia en Teorías con Dilatón de Cuerdas. En estos modelos, algunas de las constantes fundamentales dependen del espacio y del tiempo. Se muestra que los experimentos de caída libre no tienen aún precisión como para poner límites a los parámetros de la teoría.

S. J. Landau; P. D. Sisterna; H. Vucetich

2003-01-01

428

Adopción Internacional  

Microsoft Academic Search

Este Digest examina la adopción internacional como una de las soluciones posibles para aquellos niños que no pueden vivir con sus familias. Los documentos internacionales, generalmente aceptados, especifican las condiciones en las cuales se debe llevar a cabo la adopción internacional si se pretende proteger y respetar plenamente los derechos y el interés superior de los niños implicados en dicho

1999-01-01

429

Verdad, justicia y reparación. La justicia de la justicia transicional  

Microsoft Academic Search

El tema del libro es la protección de los derechos a la verdad, la justicia, la reparación y la no repetición en un contexto de justicia transicional. Su objetivo es contribuir a la reflexión teórica sobre la justicia y los estándares internacionales que hoy protegen estos derechos, así como contribuir a su defensa y promoción en contextos transicionales.En este sentido,

Tatiana Rincón

430

Liberia y el fin de Charles Taylor  

Microsoft Academic Search

Con 200 mil muertos desde el comienzo de la guerra civil y un millón de personas desplazadas (un tercio de la población), Liberia es una fuente de desestabilización de África occidental, que requiere un estudio profundo como núcleo de conflicto regional. Dejando de lado las constantes matanzas y las migraciones masivas de la última década y media, entre los factores

Juan Manuel Ortiz

431

Violación del Principio de Equivalencia en Teorías con Dilatón de Cuerdas  

NASA Astrophysics Data System (ADS)

Se estudian las violaciones al Principio de Equivalencia en Teorías con Dilatón de Cuerdas. En estos modelos, algunas de las constantes fundamentales dependen del espacio y del tiempo. Se muestra que los experimentos de caída libre no tienen aún precisión como para poner límites a los parámetros de la teoría.

Landau, S. J.; Sisterna, P. D.; Vucetich, H.

432

VIABILIDADE DO FÍGADO BIOARTIFICIAL UTILIZANDO HEPATÓCITOS HUMANOS IMUNOPROTEGIDOS POR MACROENCAPSULAÇÃO ASSESSMENT OF BIOARTIFICIAL LIVER USING HUMAN HEPATOCYTES IMMUNOPROTECTED BY MACROENCAPSULATION  

Microsoft Academic Search

RESUMO: Objetivo: O transplante de hepatócitos xenogênicos encapsulados pode ser utilizado no futuro em situações como a insuficiência hepática fulminante. Porém, observa-se perda precoce da expressão de genes hepatocitários específicos em hepatócitos humanos. O objetivo deste estudo é avaliar a influência da resposta imunológica na perda da expressão genética hepatocitária de hepatócitos humanos encapsulados e transplantados em ratos. Método: Hepatócitos

João Eduardo; Leal Nicoluzzi; João Carlos Domingues Repka; Luiz Carlos Almeida Rocha; Antonio Carlos; Ligocki Campos; Pedro Ernesto Caron; Rolland Parc

433

ESTADO LAICO, SOCIEDAD LAICA. UN DEBATE PENDIENTE 1  

Microsoft Academic Search

El hablar sobre la necesidad de secularizar el estado y la sociedad abre normalmente un gran conjunto de interrogantes. Al igual que cuando hablamos de sexualidad, se encienden los debates, se polarizan las opiniones, se comparan nuestros países y los concordatos que la mayoría de estados latinoamericanos mantienen bajo un ilusorio seculorómetro y como ante cualquier otro dilema o problema

Blanca Varela

2002-01-01

434

Los premiados con el nobel de economía, \\  

Microsoft Academic Search

Como docente en economía quiero hacer un breve y atrevido comentario. a raíz del otorgamiento del Premio Nobel de Economía 1993 a los profesores Douglas C. North y Robert W. Fogel de las Universidades de Washington (Sant Louis) y Chicago respectivamente, por sus investigaciones en el área de la Historia Económica. La primera opinión expresada por el profesor Douglas al

Hugo Silva S

1994-01-01

435

Cuidados paliativos durante el cáncer  

Cancer.gov

Hoja informativa que describe la función de los cuidados paliativos, los cuales son los cuidados que se brindan a pacientes que tienen una enfermedad grave o potencialmente letal, como el cáncer, desde el momento del diagnóstico y durante todo el curso de la enfermedad.

436

Acantose nigricante maligna: realato de caso.  

PubMed

Os autores apresentam um caso de uma paciente de 44 anos , tabagista, com dermatose disseminada diagnosticada como acantose nigricante. As lesões da pele levaram ao diagnostico de metátase de carcinoma provavelmente de origem pulmonar, localizado na região laringofaringea, até então assintomatico. PMID:24746313

Lazzarini, Rosana; Simone, Karine; Queiroz, Gabriela; Courral, Isabela; Magliari, Maria Elisa; Feder, Cecilia Kauffman Rutemberg; Lellis, Rute

2014-01-01

437

Evaluación y tratamiento de la fobia social en población infanto-juvenil de los países de habla española y portuguesa  

Microsoft Academic Search

La fobia social o trastorno de ansiedad social se define como un miedo intenso y duradero a una o más situaciones sociales en las que la persona se expone a ser observada por los demás y experimenta el temor de hacer algo o comportarse de una manera que resulte humillante o embarazosa. Se distingue de otros trastornos por el miedo

José Olivares Rodríguez

2009-01-01

438

Abundâncias químicas de estrelas T Tauri fracas  

NASA Astrophysics Data System (ADS)

Apresentamos resultados do estudo de 44 estrelas pré-seqüência principal, para as quais buscamos realizar uma classificação espectroscópica e determinar parâmetros estelares e abundâncias químicas. A amostra foi escolhida da seguinte maneira : 21 objetos selecionados a partir de catálogos de objetos jovens, como o Pico dos Dias Survey e o Herbig Bell Catalogue, e 23 objetos selecionados a partir de contrapartidas ópticas de fontes de raios X detectadas pelo satélite ROSAT. Dentre 24 objetos previamente classificados como estrelas T Tauri Fracas, apenas 7 revelaram ser realmente pertencentes à essa classe, sendo os demais objetos T Tauri Clássicas ou estrelas evoluídas da pré-seqüência principal. Esse resultado demonstra que o critério mais utilizado para distinguir as T Tauri Clássicas das T Tauri Fracas, baseado na largura equivelente da emissão Ha, não é suficiente para determinar o estágio evolutivo desses objetos. Para o cálculo de parâmetros estelares e abundâncias, foram escolhidas as estrelas que apresentam características ideais para esse tipo de estudo, como ausência de velamento, baixa velocidade de rotação e espectros com razão sinal-ruído adequada. Os parâmetros estelares como temperatura efetiva e gravidade foram determinados através do equilíbrio de excitação e ionização das linhas de Ferro, e as abundâncias químicas foram calculadas utilizando o método de síntese espectral. Serão apresentados os parâmetros estelares e as abundâncias de Lítio para toda a amostra, e abundâncias de vários elementos quimicos para 7 estrelas estudadas em maior detalhe

Rojas, G. A.; Gregorio-Hetem, J.

2003-08-01

439

Correlación entre la estructura de bandas y las propiedades físicas de óxidos cerámicos de estructura perovskita con metales de transición (I): Propiedades de conducción electrónica  

Microsoft Academic Search

En este artículo se revisa los principales modelos teóricos, que pretenden dar una explicación sobre las propiedades de con- ducción electrónica de óxidos cerámicos con estructura perovskita, que incluyen en la posición B metales de transición del primer período (Fe, Co, Ni, Mn), en conexión con su estructura de bandas y el carácter de sus electrones más externos, así como

L. SÁNCHEZ; J. R. JURADO

440

ESTUDIO DE LA RESISTENCIA MECÁNICA Y LA TEXTURA DE LOS CAPARAZONES MINERALIZADOS DE BIVALVOS  

Microsoft Academic Search

RESUMEN Los caparazones de moluscos marinos se encuentran principalmente constituidos por variantes cristalinas del CO3Ca, aragonita o calcita, embebidas en un polímero biológico formando un bio-compuesto. La mineralización procede de una manera orientada y las texturas resultantes pueden ser medidas por técnicas usuales de difracción. Las mismas pueden incluso ser utilizadas como distintivas de un género o una especie. Esa

R. E. Bolmaro; P. Romano Trigueros; S. Zaefferer

441

Películas delgadas de CdS: Preparación y comparación de propiedades usando diferentes técnicas de depósito  

Microsoft Academic Search

Se depositaron películas delgadas de CdS sobre substratos de vidrio usando la técnica de depósito por baño químico en dos modalidades: agitando magnéticamente la solución del baño y vibrándola con frecuencias de ultrasonido, así como por la técnica de sublimación en espacio cerrado. Se comparan las propiedades encontradas en este material mediante el estudio de su morfología, su estructura cristalina,

A. I. Oliva; O. Solis-Canto; R. Castro-Rodríguez; Víctor Sos; P. Quintana

442

Hacia un framework Orientado a Objetos para Bills of Materials Complejos  

Microsoft Academic Search

Las empresas de producción industrial se enfrentan por un lado, a los cambios constantes de las condiciones del mercado, como po r ejemplo, los patrones de demanda, ciclo de vida de los productos mucho más cortos, etc. Por otro, a un mercado global, que requiere que la cadena de suministros, alcance muy altos niveles de eficiencia. Para mantener la competitividad

Marcela Vegetti; Gabriela Henning; Horacio Leone

443

Enfoques de programación matemática fuzzy multiobjetivo para la planificación operativa del transporte en una cadena de suministro del sector del automóvil = Fuzzy Multiobjective Mathematical Programming Approaches for Operational Transport Planning in an Automobile Supply Chain  

Microsoft Academic Search

En este trabajo se presenta un modelo de programación matemática fuzzy multiobjetivo para la planificación del transporte a nivel operativo en una cadena de suministro. Los objetivos del modelo propuesto son la minimización del número de camiones utilizados y del inventario total, considerando como parámetro borroso las capacidades de los vehículos empleados. Se propone una metodología de resolución para transformar

Manuel Díaz-Madroñero; David Peidro; Josefa Mula; Francisco J. Ferriols

2010-01-01

444

ANÁLISIS CLUSTER DE LOS HOTELES ASOCIADOS A ASOTELCA Y COTELCO DE LA CIUDAD DE CARTAGENA DE INDIAS – COLOMBIA  

Microsoft Academic Search

En este trabajo se analizan las variables más comunes en los procesos administrativos de los hoteles Asotelco y Cotelco en la ciudad de Cartagena a partir de estudios realizados a sus trabajadores y tomando como metodología la aplicación del concepto de Clúster y conglomerados estadísticos. En la primera parte se muestra una introducción del concepto de clúster y su valiosa

Jorge Del Río Cortina; Osvaldo Blanquicett Lozano

2009-01-01

445

A EXTENSÃO OFICIAL NO BRASIL: UMA AVALIAÇÃO DIAGNÓSTICA. O CASO DO NORDESTE  

Microsoft Academic Search

Este trabalho é resultado de uma investigação sobre a ação dos órgãos oficiais de Assistência Técnica e Extensão rural (ATER) no nordeste brasileiro, com o objetivo avaliar as ações dos mesmos visando a implementação da nova Política Nacional de ATER (PNATER), na região como referência para o país. Ela contemplou os Estados de Bahia, Pernambuco, Paraíba, Rio Grande do Norte,

José Ribamar; Furtado de Souza

446

A psicologia feminista e a violência contra as mulheres na intimidade: a (re)construção dos espaços terapêuticos  

Microsoft Academic Search

RESUMO: O presente documento constitui uma reflexão crítica so- bre os pressupostos gerais das metodologias feministas aplicados ao exercício da Psicologia especificamente em contextos terapêuticos. É feita uma breve alusão ao enquadramento histórico que esteve subjacente à emergência da Psicologia feminista, bem como aos prin- cípios que estiveram na base do desenvolvimento de novas e inovado- ras práticas terapêuticas dirigidas,

Sofia Neves; Conceição Nogueira

2003-01-01

447

eVALUACiÓn deL eFeCto ReSidUAL deL teMePHoS en LARVAS de Aedes aegypti en LiMA, PeRÚ  

Microsoft Academic Search

ReSUMen El temephos ha sido usado como la única estrategia de control para Aedes aegypti en Lima durante los últimos años. Objetivo: EvaluarlaeficaciaresidualdetemephosparaelcontroldeAe. aegypti en condiciones de campo y laborato- rio en Lima, Perú. Materiales y métodos: Se eligieron ocho tanques bajos de concreto (TBC) depósitos predominan- temente infestados con Ae. aegypti en el distrito de San Juan de Lurigancho,

Miriam Palomino S; Lely Solari; Walter León C; Rosario Vega H; Máximo Vergaray C; Luis Cubillas; Rosa Mosqueda C; Norma García A

448

Hydroliquefaction of Coal with Supported Catalysts: 1980 Status Review.  

National Technical Information Service (NTIS)

The objectives of the program have been to determine catalyst deactivation kinetic models and catalyst deactivation modes for supported Co-Mo and Ni-Mo catalysts used primarily in coal liquefaction via the H-COAL process. Emphasis has been on developing m...

L. M. Polinski G. J. Stiegel R. E. Tischer

1981-01-01

449

Education in the human bounderies  

Microsoft Academic Search

Resumo: Neste artigo, o autor traz reflexões sobre o papel da educação no processo de formação do homem nas fronteiras do humano. Analisa os problemas do homem na contemporaneidade, focalizando a problemática da penetração da racionalidade instrumental em âmbitos da interação social, substituindo a racionalidade comunicativa, como base de decisões que envolvem o homem em seu agir ético, moral e

Maria Augusta Salin Gonçalves

450

Análise comparativa do isolamento do ruído aéreo entre diferentes painéis de vedação utilizados no Brasil  

Microsoft Academic Search

RESUMO: O artigo aborda a avaliação do isolamento acústico de painéis de vedação que vem sendo utilizados no Brasil. Os painéis que surgem como alternativa à alvenaria convencional e o seu uso indiscrimado, sem uma avaliação dos requisitos mínimos de desempenho, são o principal objetivo deste trabalho. A análise dos resultados do índice de isolação sonora é feita através do

Danielly Borges

451

EVALUACIÓN DEL CRECIMIENTO Y PRODUCCIÓN DE Pleurotus ostreatus SOBRE DIFERENTES RESIDUOS AGROINDUSTRIALES DEL DEPARTAMENTO DE CUNDINAMARCA EVALUATION OF GROWTH AND PRODUCTION OF Pleurotus ostreatus ON DIFFERENT AGROINDUSTRIALS WASTES OF CUNDINAMARCA  

Microsoft Academic Search

Resumen Se llevó a cabo la evaluación del cultivo de Pleurotus ostreatus, para determinar el residuo sobre el cual este hongo genera mejor crecimiento y producción. Los sustratos evaluados fueron residuos agroindustriales del departamento de Cundinamarca (capacho de uchuva, cáscara de arveja y tusa de maíz); teniendo como sustrato control el aserrín de roble. Las mezclas a evaluar fueron empacadas

Claudia López-Rodríguez; Ricardo Hernández-Corredor; Christian Suárez-Franco; Marta Borrero; Facultad de Ciencias

2008-01-01

452

Tensión diplomática entre Colombia y Ecuador durante 2006-2009: una mirada desde la teoría de juegos  

Microsoft Academic Search

Resumen Este documento centra su análisis en la tensión diplomática que sostuvieron Colombia y Ecuador durante el periodo 2006-2009, a partir de las fumigaciones aéreas que Colombia realizó en la zona de frontera con el territorio ecuatoriano, así como el ataque realizado por el ejército colombiano al campamento de las Fuerzas armadas revolucionarias de colombia (Farc), en donde fue abatido

Santiago Arroyo Ma; Juan D. Bolañosb

2010-01-01

453

Un Juego de Gravedad con Reconocimiento de Voz para Niños con Problemas de Lenguaje  

Microsoft Academic Search

En este trabajo presentamos un juego electrónico (Gravedad) con reconocimiento de voz para estimular a niños en edad escolar con problemas del lenguaje dislalia. Se presenta las características y elementos del juego electrónico, así como su integración con el sistema de reconocimiento de voz y los resultados de unas pruebas de usabilidad. El juego de Gravedad se desarrolló utilizando el

Carlos Miranda-Palm; Reyna Camal-U; José Cen-Magaña; Cinhtia Gonzalez-Segura; Sergio Gonzalez-Segura; Michel García; Lizzie Narvaez-Díaz

454

Algunos cambios en el juego de Voleibol actual y sus efectos en la alta competencia internacional en equipos del sexo masculino  

Microsoft Academic Search

Teniendo en cuenta el desarrollo experimentado por Cuba en el deporte mundial y específicamente en el voleibol, los autores han querido contribuir a la consolidación de estas posiciones, orientando el presente estudio hacia el establecimiento de una caracterización que defina las nuevas condiciones presentes en el juego de Voleibol actual y como han influido en la actividad, competitiva los cambios

Gustavo Luna Pino; Lorenzo Gómez; Carlos Acosta Alonso

2002-01-01

455

La place du travail dans les identités  

Microsoft Academic Search

[spa] El lugar dei trabajo en las identidades . . La encuesta Histoire de vie (Historia de vida) permite poner de relieve el lugar ocupado por el trabajo entre los elementos constitutivos de la identidad de las personas, as! como la ifnportancia relativa que éstas le dan. Si el 40 % de las personas cuestionadas y el 54 % de

Claudia Sénik; Hélène Garner; Dominique Méda

2006-01-01

456

La estrategia de los EE.UU. atenta contra la Humanidad y amenaza al planeta  

Microsoft Academic Search

Es imprescindible analizar y comprender el proceso que llevó a los EE.UU. a erigirse en una potencia imperialista como nunca antes conoció la Humanidad. Asimismo comprender la conversión de una sociedad que privilegiaba sobre todo la Democracia y la participación en las decisiones en los distintos niveles de gestión ciudadana, en una población que privilegia el consumo, la riqueza y

Jacob Goransky

457

Catalyst Development for Coal Liquefaction. Monthly Report, August 1977.  

National Technical Information Service (NTIS)

The preparation, characterization and testing under standard conditions of various catalyst formulations continued. Catalysts tested were primarily compositions in which other constituents such as Sn, Ni, CuCr sub 2 O sub 4 and Pb were added to CoMo on th...

S. G. Hindin

1977-01-01

458

ESPECIFICACIONES Y DISPERSIÓN DE RESULTADOS EN EL ENSAYO FIP DE CORROSIÓN BAJO TENSIÓN  

Microsoft Academic Search

Resumen. La función que desempeña el acero de pretensado como material de construcción requiere un equili- brio de prestaciones que sólo un cuidadoso proceso de fabricación permite alcanzar. Entre las características de- terminantes de estas prestaciones está la sensibilidad a la corrosión bajo tensión, que en Europa se valora a través del ensayo normalizado por la Federación Internacional del Hormigón

A. Valiente

2006-01-01

459

El alcohol y el riesgo de cáncer  

Cancer.gov

Hoja informativa que resume la comprobación de la relación entre el consumo de alcohol y el riesgo de varios cánceres. Incluye información acerca de los factores que afectan el riesgo de cánceres asociados con el alcohol, como lo son los genes de una persona y el uso de tabaco.

460

Idosos atendidos em serviço de emergência de saúde mental: características demográficas e clínicas Elderly treated in mental health emergency rooms: demographic and clinic characteristics  

Microsoft Academic Search

O envelhecimento populacional vem provocando um aumento contínuo no número de idosos que buscam atendimento para problemas de saúde mental. Este trabalho teve como objetivo investigar os transtornos mentais que mais freqüentemente levam o idoso a um serviço de emergência psiquiátrica. Todos os idosos atendidos entre 1 o de janeiro e 31 de dezembro de 1997 no pronto-socorro de saúde

Osvaldo P. Almeida

461

A New Specimen of Eurylambda aequicrurius and Considerations on “Symmetrodont” Dentition and Relationships  

Microsoft Academic Search

A new specimen of the tinodontid ''symmetrodont'' Eurylambda (Simpson, 1925a, 1929) from the Late Jurassic Como Bluff Quarry, Morrison Formation, is described. The specimen, a complete upper left molariform, is probably an M1. The major crown cusps of Eurylambda show similarities to those of triconodontids on the one hand and to spalacotherioids on the other. Cusp B of basal mammaliaforms

GUILLERMO W. ROUGIER; BARTON K. SPURLIN; PETER K. KIK

2003-01-01

462

A SUSTENTABILIDADE DAS RESERVAS EXTRATIVISTAS PELA PERSPECTIVA DA ECONOMIA ECOLÓGICA  

Microsoft Academic Search

As Reservas Extrativistas (RESEX) são áreas de domínio público, com uso concedido às populações extrativistas tradicionais, cuja subsistência baseia-se no extrativismo e na agricultura de subsistência e na criação de animais de pequeno porte, e têm como objetivos básicos proteger os meios de vida e a cultura dessas populações, e assegurar o uso sustentável dos recursos naturais da unidade. Porém,

Francisco Carlos Da Silveira Cavalcanti; Raimundo Claudio Gomes Maciel; Joao Alfredo De Carvalho Mangabeira; Bastiaan Philip Reydon

2008-01-01

463

Dietary Screener Module (DTQ) - Spanish  

Cancer.gov

El arroz integral es un tipo de grano entero. Es de color café, se tarda más para cocer que el arroz blanco. El arroz integral contiene casi todo el grano del arroz y no es procesado como el arroz blanco. Comparado al arroz blanco, el arroz integral contiene más fibra y más de algunas vitaminas y minerales que se pierden al procesar.

464

RENTABILIDAD, ESTRUCTURA DE MERCADO Y EFICIENCIA EN LA BANCA  

Microsoft Academic Search

Este trabajo analiza la relación existente entre la estructura del mercado y la rentabilidad en el sector bancario español en el período 1986-95 uti- lizando una medida directa de eficiencia. Los resultados obtenidos per- miten rechazar la hipótesis tradicional de colusión tanto en el sector de las cajas de ahorros como en la banca nacional ya que no se encuentra

JOAQUÍN MAUDOS

2001-01-01

465

GANANCIAS DE EFICIENCIA VERSUS COSTES DE TRANSACCIÓN DE LOS MERCADOS DE AGUA  

Microsoft Academic Search

La introducción de los mercados de agua se ha planteado en los últimos años como un instrumento eficaz para la mejora de la gestión de los recur- sos hídricos en la agricultura, centrando la atención en las ganancias econó- micas que de ellos pueden resultar. No obstante, la efectividad e incluso la viabilidad de los mercados de agua está limitada

YOLANDA MARTÍNEZ MARTÍNEZ; RENAN-ULRICH GOETZ

2007-01-01

466

Algunos efectos del mercado único europeo sobre la economía española: Un análisis a través de un modelo de equilibrio general aplicado  

Microsoft Academic Search

En este trabajo se examinan algunos efectos de la aplicación de las normas del Mercado Único europeo sobre la economía española. La metodología se basa en simulaciones a partir de un modelo de equilibrio general aplicado especialmente diseñado al efecto. El modelo tiene dos características particulares: por una parte, se incluyen aspectos de competencia imperfecta tales como rendimientos crecientes a

Antonio G. Gómez-Plana; Oscar Bajo-Rubio

467

Desempleo y la estructura de los mercados laborales en Colombia  

Microsoft Academic Search

Los problemas de desempleo e ingresos bajos de un sector de la fuerza laboral empleada ha sido de gran interés, tanto en países desarrollados como en vías de desarrollo. Se usan comúnmente tres hipótesis para explicar el desempleo en países en vías de desarrollo; la de crecimiento insuficiente, la demográfica (a medida que se acelera el crecimiento de la población

Ramón E. López

468

La reforma de la contratación en el mercado de trabajo: entre la flexibilidad y la seguridad  

Microsoft Academic Search

El actual debate sobre la reforma laboral pendiente en España se centra demasiado en el abaratamiento del despido o las modalidades de contratación como únicas formas de flexibilizar el mercado de trabajo. Este tipo de propuestas, además, choca con la percepción de una fuerte pérdida de seguridad de los trabajadores. En este trabajo nos planteamos cómo conciliar una mayor flexibilidad

Vicente Royuela; Manuel Sanchis

2010-01-01

469

Identificación de variables en el proceso de decisión de compra de materiales autoadhesivos  

Microsoft Academic Search

El objetivo de la mayoría de las compañías se centra en obtener el liderazgo de su respectivo mercado, desarrollando diferentes estrategias, las cuales buscan ganar la preferencia del cliente en el momento de seleccionar una marca. Como variable crítica para lograrlo se encuentra la generación de una ventaja competitiva que lo diferencie de sus competidores. Sin embargo, la construcción de

David Gómez Gómez

2001-01-01

470

El seguro de depósito y su incidencia en la disciplina de mercado en Colombia  

Microsoft Academic Search

El concepto de disciplina de mercado es de gran importancia en el análisis del sistema financiero de un país. La disciplina de mercado se define como la reacción de los acreedores bancarios frente al riesgo financiero y la subsiguiente reacción de los bancos ante las acciones de sus acreedores. Este trabajo busca probar si la disciplina de mercado es típica

Julián Márquez A

2011-01-01

471

Four essays on the interaction between credit derivatives and fixed income markets  

Microsoft Academic Search

En esta tesis estudio la interacción entre los mercados, tanto a nivel corporativo como soberano, de Derivados de Crédito y Renta Fija desde distintas perspectivas. Para el caso corporativo se realiza un análisis de arbitraje, liderazgo en la formación de precios e integración financiera en los mercados anteriormente mencionados. Para el caso soberano el estudio se centra en el mercado

Sergio Mayordomo

472

¿POR QUE UN MERCADO DE SUBYACENTES TIENE PODER ECONÓMICO DE DERRUMBAR UN MERCADO REAL? TEOREMA GLOBAL DE LA NO AGREGACIÓN DE CADENAS ECONÓMICAS  

Microsoft Academic Search

Las cosas últimamente, ya comienzan a estar un poquitín chungas para Europa, como para tomárselo a broma. Estados unidos, mas o menos, esta reaccionando, pero lo cierto es que Europa, no la veo yo muy bien que digamos. Así que tratemos de echar una manita, pues ya sin ningún tipo de broma, Europa esta al borde del colapso.

David Sánchez Palacios

2010-01-01

473

Applications of Reinforced Glass and Polyethylene Fibers in Orthodontic Practice - Part I Uso de Fibras de Vidro e Polietileno Reforçados por Resina em Ortodontia - Parte I  

Microsoft Academic Search

Resumo Este artigo aborda a utilização clínica de fibras de vidro e de polietileno em Ortodontia. Casos clínicos ilustram a sua utilização de modo tradicional e inovador o que vem mudar conceitos, a mecânica e a estética dos aparelhos fixos. Como vantagens são destaca - das a realização de tratamentos com menor utilização de braquetes, fios e bandas, maior conforto

Daniel Ianni

2003-01-01

474

Retornos e Riscos das Ações de Valor e de Crescimento no Mercado Brasileiro no Período de Janeiro de 2001 a Junho de 2004, com Base no Índice IBrX 50  

Microsoft Academic Search

Resumo A avaliação e estudo das carteiras compostas por ações do tipo valor (ações com alta relação livro-mercado) e ações do tipo crescimento (ações com baixa relação livro-mercado), pode representar um fator decisivo para obtenção de retornos financeiros superiores. Assim como já analisado e estudado em mercados internacionais, buscamos constatar no mercado brasileiro que carteiras compostas por ações do tipo

EMERSON BAZILIO PEDREIRA

2004-01-01

475

Teoria das Ondas de Elliott- Uma aplicação ao mercado de ações aa Bm&Fbovespa  

Microsoft Academic Search

Os preços dos ativos negociados em bolsas de valores, assim como qualquer outro tipo de commodity do mercado financeiro, oscilam naturalmente com a procura por esses produtos. Essas oscilações, juntamente com a assimetria das informações acerca dos preços desses produtos geram processos de volatilidade. Charles Dow, no início do século XX criou índices setoriais, nos quais reunia papéis da mesma

Daniele Ferreira de Sousa

476

Estratégias de Coping de Mães de Portadores de Autismo: Lidando com Dificuldades e com a Emoção Coping Strategies of Mothers of Autistic Children: Dealing with Behavioral Problems and Emotions  

Microsoft Academic Search

Resumo Estudos têm apontado evidências de estresse em famílias de portadores de autismo. Neste processo, deve-se considerar as estratégias de coping utilizadas pelos familiares frente às circunstância s adversas. O objetivo deste estudo foi verificar as estratégias de coping maternas frente a dificuldades dos portadores de autismo, assim como as estratégias das mães para lidar com as próprias emoções desencadeadas

Carlo Schmidt; Débora Dalbosco Dell' Aglio; Cleonice Alves Bosa

477

FACTORES DE ÉXITO DEL PROCESO DE PUESTA EN MARCHA DE LA EMPRESA: VALORES CULTURALES, REDES SOCIALES Y AYUDAS PÚBLICAS \\/ SUCCESS FACTORS OF THE PROCESS OF ENTERPRISE CREATION: CULTURAL VALUES, SOCIAL NETWORKS AND PROGRAMS OF PUBLIC HELP  

Microsoft Academic Search

En este trabajo analizamos el efecto de los valores culturales, las redes sociales y los programas de apoyo de organismos públicos en la puesta en marcha de proyectos empresariales. Los resultados muestran que los individuos con valores culturales de seguridad y universalismo –mixtostienden a finalizar con éxito la creación de su empresa. Por el contrario, determinados valores colectivistas, como la

P. M. García Villaverde; Valencia de Lara. P

2009-01-01

478

PREVISÃO DA VAZÃO AFLUENTE MENSAL DO RIO SÃO FRANCISCO USANDO-SE REDES DE ELMAN  

Microsoft Academic Search

Resumo: Este artigo apresenta resultados de previsão da vazão afluente mensal do Rio São Francisco, que alimenta a usina de Sobradinho, usando-se redes neurais de Elman (RNA). As redes neurais de Elman utilizadas foram preparadas com o objetivo de receber como entrada amostras da série temporal da vazão afluente do Rio São Francisco deslocadas mês a mês. Para tal, nas

Luiz Biondi Neto; Pedro Henrique Gouvêa Coelho; Luís Chiganer; Lídia Angulo Meza; Luiz Palmeira Monteiro

2005-01-01

479

NATUREZA DA CIÊNCIA E ENSINO DE FÍSICA: CONSTRUINDO RELAÇÕES A PARTIR DO ESTUDO DA ÓPTICA NEWTONIANA NATURE OF SCIENCE AND PHYSICS TEACHING: BUILDING CONECTIONS THROUGH THE ANALYSIS OF NEWTONIAN OPTICS  

Microsoft Academic Search

A busca por um ensino de física que desperte o senso crítico de alunos e professore s sobre assuntos relacionados à C iência tem promovido a criação de diversas propostas e iniciativas que envolvam a discussão da Natureza da Ciência (NdC). A NdC pode ser definida como um conjunto de saberes sobre a C iência e sobre os processos que

Breno Arsioli Moura; Cibelle Celestino Silva

2008-01-01

480

Las Políticas Neoliberales y la cuestión Territorial  

Microsoft Academic Search

La profunda crisis del capitalismo y las políticas creadas tendientes a contrarrestarla han colocado en primer plano y como elementos determinantes de ésta, a los procesos económicos en su relación dialéctica con la política y el Estado. La cuestión regional y urbana ha sido considerada secundaria dada la sobrevaloración otorgada a otros procesos políticos, sociales y culturales examinados sin considerar

Emilio Pradilla Cobos

1990-01-01

481

pserra@dii.uchile.cl  

Microsoft Academic Search

Desde su privatización, las empresas de telecomunicaciones han aumentado la cobertura de los servicios, así como su eficiencia interna. Luego de la desregulación de los servicios de larga distancia, las tarifas cayeron fuertemente y algo similar ocurrió con telefonía móvil, después de que el número de operadores aumentara de dos a cuatro. Sin embargo, la regulación insuficiente de los cargos

Ronald Fischer; Pablo Serra

2002-01-01

482

Enteropatía congénita y trasplante intestinal  

Microsoft Academic Search

ExtractoLa insuficiencia intestinal (II) exige el uso de nutrición parenteral (NP). Entre las causas de II prolongada grave destacan el síndrome del intestino corto, trastornos de la motilidad grave (aganglionosis total o subtotal o síndrome de seudoobstrucción intestinal crónica) y enfermedades congénitas del desarrollo de los enterocitos. Puede aparecer insuficiencia hepática grave en pacientes con II como consecuencia de una

Olivier Goulet

2006-01-01

483

Mundos Torcidos: diferenças entre crioulos e africanos na dinâmica da construção de comunidades de grandes propriedades no Sudeste brasileiro do século XIX. Twisted worlds: differences between African and Creole in the dynamics of building communities of large properties in the Southeast of Brazil of the nineteenth century  

Microsoft Academic Search

Resumo: Este trabalho tem como objetivo identificar e analisar elementos constitutivos das relações entre grupos de escravos oriundos da diáspora africana e seus pares nascidos no Brasil, em busca de um padrão cultural e de fundamentos morais que organizariam as diferenças instauradas no cativeiro, buscando compreender um pouco mais a dinâmica do manuseio de patrimônios imateriais, quer trazidos na travessia

Carlos Engemann

484

SOBRE O PROCESSO DE MEDIAÇÃO SOCIAL NOS PROJETOS DE DESENVOLVIMENTO: UMA REFLEXÃO TEÓRICA  

Microsoft Academic Search

A mediação social é um tema que nos últimos anos vem ganhando espaço nas discussões sobre o desenvolvimento rural, mais especificamente, nas questões referentes à intervenção para o desenvolvimento. Este processo compreende uma relação que se apresenta como uma “via de mão dupla”, ou seja, a via representa a relação, uma das mãos é os mediadores, e a outra é

Cidonea Machado Deponti; Jalcione Almeida

2008-01-01

485

Estudio de los efectos de la ayuda al desarrollo sobre el comportamiento fiscal de los gobiernos en Centroamérica  

Microsoft Academic Search

Desde su aparición, el papel y la efectividad de la ayuda al desarrollo ha sido una cuestión muy debatida tanto por la comunidad científica como por otras esferas de la sociedad, políticos, técnicos y evidentemente, la población civil. Pese al notable descenso en los flujos de ayuda internacional durante la última década del siglo pasado, esta vía de financiación sigue

Mariola Gozalo Delgado

2006-01-01

486

JOAN LLUHÍ VALLESCÀ, MINISTRO DE TRABAJO, SANIDAD Y PREVISIÓN DE LA SEGUNDA REPÚBLICA: EPISTOLARIO JURÍDICO, POLÍTICO Y DE RECOMENDACIÓN (SEGUNDA PARTE)  

Microsoft Academic Search

El artículo incide en la ingente actividad que el catalán Joan Lluhí i Vallescá (Barcelona 1897 – México 1944) desarrolló como Ministro de Trabajo, Sanidad y Previsión en los escasos cuatro meses de 1936, desde mediados de mayo a principios de septiembre, en los que estuvo al frente de dicho Ministerio en sendos gobiernos presididos por Santiago Casares Quiroga (1884-1950)

María Encarnación Gómez Rojo

2010-01-01

487

Ajuste estructural y mercado del trabajo: Nigeria después de la crisis del petróleo  

Microsoft Academic Search

En este artículo examinamos la experiencia de Nigeria durante la crisis petrolera de los años 1980 y el comienzo de la aplicación de un paquete de ajuste estructural. Nuestro análisis se concentra en el rol jugado por el mercado del trabajo, particularmente en relación a la situación de empleo y desempleo, como también a los flujos migratorios despertados por la

Paul Collier; Luis Riveros

488

Orientación al mercado y performance en las organizaciones públicas. Un estudio en el ámbito de los gobiernos locales españoles  

Microsoft Academic Search

El presente trabajo posee como finalidad vincular los estudios de orientación al mercado desde el ámbito del marketing, con las propuestas de reforma y modernización desde los ámbitos administrativo y político. La orientación al mercado en las organizaciones empresariales, sus antecedentes y consecuencias, constituyen un tema ampliamente investigado en el ámbito empresarial. Sobre la base del análisis de estos trabajos

Amparo Crevera Taulet

2004-01-01

489

El papel de la Universidad en el desarrollo y la innovación tecnológica: la experiencia catalana (Relación Universidad-Empresa-Gobierno)  

Microsoft Academic Search

Este trabajo busca proporcionar algunos elementos que permitan valorar una de las facetas de la contribución de la Universidad a su nueva misión, aquella orientada al desarrollo tecnológico y, como consecuencia, al desarrollo económico. En la primera parte se plantea que la nueva misión de la Universidad, además de las funciones clásicas referidas a la formación de recurso humano y

Dolly Yazmín Camacho Corredor

2003-01-01

490

GOBIERNO ELECTRÓNICO: FASES, DIMENSIONES Y ALGUNAS CONSIDERACIONES A TENER EN CUENTA PARA SU IMPLEMENTACIÓN  

Microsoft Academic Search

El uso de las TIC cambia radicalmente la forma en que los gobiernos administran y ejecutan sus procesos internos, y abre la posibilidad de mejorar e incrementar los canales de comunicación con los ciudadanos. Así, el gobierno electrónico se observa como un medio para que los gobiernos modernicen sus procesos, mejoren sus interacciones con los ciudadanos y disminuyan la fractura

Roberto de Armas Urquiza; Alejandro de Armas Suárez

2011-01-01

491

El conflicto entre la demanda de flexibilidad laboral y la resistencia a la reforma del mercado de trabajo en España  

Microsoft Academic Search

La resistencia a las reformas laborales puede explicarse como un conflicto de intereses entre colectivos de individuos con distintas preferencias sobre la flexibilidad laboral. En este artículo presentamos evidencia empírica sobre cómo varían estas preferencias en función de las características socio-económicas de los ciudadanos en España. Documentamos que, a diferencia de lo que ocurre en los países de nuestro entorno,

Juan José Dolado; Florentino Felgueroso; Marcel Jansen

2010-01-01

492

Reflexiones sobre el buen gobierno corporativo en las empresas periodõ ´sticas  

Microsoft Academic Search

Resumen: El interes por el gobierno corporativo en las empresas informativas no es un tema nuevo, pero ha adquirido singular relevancia en los ultimos anos, como resultado de las transformaciones que se han vivido en los esquemas de propiedad y de gestion de las compan ˜õ ´as. En este artõ ´culo se trata de explicar por quela naturaleza de los

Angel Arrese

493

El trabajo político e ideológico en la universidad cubana de hoy. El socialismo en las nuevas condiciones del siglo XXI: una opción viable  

Microsoft Academic Search

Un objetivo de primer orden en todos los años de Revolución ha sido lograr en los graduados universitarios la formación integral de un profesional revolucionario. Los cambios operados en la situación internacional después del derrumbe del campo socialista y la desaparición de la URSS así como el incremento de la agresividad económica e ideológica del gobierno de Estados Unidos y

Anay Pulgarón Ramos

2011-01-01

494

¿Es la Ocratoxina A una micotoxina mutagénica?  

Microsoft Academic Search

Resumen: La ocratoxina A es una micotoxina producida por especies de los géneros Aspergillus y Penicillium que a través de los alimentos puede pasar al ser humano. Su órgano diana es el riñón pero también es hepatotóxica, inmunotóxica y teratogéni- ca. Ha sido clasificada por la Agencia Internacional de Investigación contra el Cáncer (IARC) como posible carcinóge- no humano (clase

Arbillaga L; López de Cerain

2004-01-01

495

TÉCNICA DE PREPARO DE MEDICAMENTOS PARENTERAIS: TOCAR OU NÃO NO ÊMBOLO? TECHNIQUE FOR THE PREPARATION OF PARENTERAL DRUG: TOUCHING OR NOT TOUCHING THE PISTON?  

Microsoft Academic Search

RESUMO RESUMO RESUMO RESUMO RESUMO: No preparo de medicação, cabe ao profissional manter a segurança microbiológica evitan- do que ocorra contaminação. Um dos pontos descritos para evitar a contaminação do líquido aspirado por meio de seringas é não tocar no êmbolo durante o preparo da medicação. Esta pesquisa teve como objetivos descrever as recomendações técnicas quanto a tocar ou não

Adriano Menis Ferreira; Alexandre Duarte Toledo; Gláucia Pereira dos Santos; Kátia Rezende

496

Resolución de problemas basada en el análisis. Hacer del análisis y del razonamiento el foco de la enseñanza de la física  

Microsoft Academic Search

Resumen. Usando los resultados provenientes de la investigación educativa en áreas tales como concepciones alternativas, diferencias entre expertos y novatos, adquisición de esquemas, sobrecarga cognitiva y análisis jerárquico, hemos desarrollado un marco para pensar sobre la organización del conocimiento y su uso para la comunicación, y sobre el razonamiento y la resolución de problemas. Basados en este marco y en

J. Leonard William; William J. Gerace; Robert J. Dufresne

2002-01-01

497

Sobre as bases dos procedimentos investigativos em psicanálise  

Microsoft Academic Search

Resumo O presente trabalho examina as bases da pesquisa psicanalítica. Parte das marcas deixadas nas investigações psicanalíticas pelos procedimentos científicos de disciplinas como a neurologia e a neurofisiologia no século XIX. Em seguida, acompanha o surgimento de um novo objeto, o sujeito do inconsciente, o qual, ainda que requeira operações que mantenham o rigor e a precisão característicos do pensamento

Anna Carolina; Lo Bianco

498

On the fractionation of halophilic enzymes with ammonium sulphate  

Microsoft Academic Search

Resúmen Seis enzimas de la bacteria halófila extremaHalobacterium cutirubrum han sido parcialmente purificadas por fraccionamiento de los extractos crudos en CINa 5M con solución saturada de sulfato de amonio. Se discuten las ventajas del procedimiento, como un método general para enzimas halofílicas, comparado con otros métodos descriptos en la literatura.

A. I. Higa; J. J. Cazzulo

1973-01-01

499

China y EE.UU.: La Competencia por Asia  

Microsoft Academic Search

El presente trabajo tendrá como objeto analizar el desenvolvimiento de la política exterior china en el ámbito asiático. Además, la nueva doctrina estratégica de Washington y su política sobre Asia y Corea Del Norte, son susceptibles de crear inconvenientes serios para los intereses estratégicos de Beijing. Se intentará dar un panorama de los cambios sufridos en las relaciones sino\\/norteamericanas por

Gustavo A. Cardozo; Coordinador Programa Asia-Pacifico

500

ANÁLISIS DE LA PRODUCCIÓN CIENTÍFICA ESPAÑOLA CITADA EN PATENTES BIOTECNOLÓGICAS EN EE.UU  

Microsoft Academic Search

Resumen: A partir de las experiencias obtenidas en dos recientes estudios cien- ciométricos sobre transferencia de tecnología, se dan a conocer algunas de las aplicaciones que ofrece el análisis de la literatura científica citada en docu- mentos de patente, así como las limitaciones y dificultades metodológicas que presenta este tipo estudios. Este artículo describe el procedimiento metodoló- gico utilizado para

Luis M. Plaza; Armando Albert

2004-01-01