The effects of artificial aging on the microstructure in the weldment of an API 5L X-52 steel pipe were studied. Aging was performed at 250 deg. C over a period of 1000 h and values were recorded at every 100 h intervals. Transmission electron microscopy observations showed precipitation ...

The influence of sandblasting on a surface notched of pipeline with API 5L X52 steel is studied. The purpose of this study is to determine the evolution of static characteristics and lifetime of material in both directions of pipeline (Longitudinal (L) and Transverse (T)). Specimens were taken ...

Concepts for the development of a model to predict natural gas transmission pipeline lifetime in a corrosive environment are constructed. Primarily, the effects of environmentally assisted cracking (EAC) are explored. Tensile test specimens from a sample of API 5L X-52 pipeline were tested in a ...

Homopolar pulsed welding (HPW) is a solid-state welding process that relies on a pulse of direct current from a homopolar generator (HPG) to heat the contacting surfaces of two or more work pieces to forging temperature, at which time upset force is applied and a forged joint is formed. Heat input is concentrated at the interface, due to the constriction resistance between contacting ...

... Title : The Effect of Slow Plastic and Elastic Straining on Sulphide Stress Cracking and Hydrogen Embrittlement of 3.5% Ni Steel and API 5L X60 ...

An API 5L X-70 grade steel for large diameter pipeline application with sour gas resistance was developed by electric arc furnace processing, furnace ladle treatment, vacuum degassing, ladle treatment, and continuous casting, followed by three different controlled rolling schedules and air cooling or accelerated cooling. Mechanical ...

Laboratory and field tests were conducted to evaluate the corrosion behavior of API 5L grade B and X52 steels using Furrial's crude oil in the presence of water and gas containing carbon dioxide (CO{sub 2}) and hydrogen sulfide (H{sub 2}S). The results suggest that the corrosiveness of this crude oil/water/gas mixture is not ...

... been recorded in the diet1. Terrestrial A small police outpost was established on the island in 1969. ... 40 birds, but given its high levels of recruitment, this is probably not a serious threat, t...

The objective of this work was to study the influence of titanium variations on the API 5L-X70 steel weld metal properties. The relationship between microstructure and toughness of the weld deposit was studied by means of full metallographic, longitudinal tensile and Charpy-V notch tests on the specimens cut transversely to the weld ...

... The objectives were a medium weight, high air permeability fabric with balanced tensile and elongation. ... Elongation % (W x F) 5100 50 x 52 35 x 30 ...

13 Oct 2010 ... En ambientes de muy baja gravedad, en cambio, no se necesita ning?n ... hechas de aleaci?n de titanio, vidrio met?lico, y acero inoxidable. ...

The publication presents the papers delivered in a workshop about trials and selection of the steels and their thermal treatments for stamping industry.

... including a direct microscopic examination and sodium nitrate flotation, completed during quarantine in May 2002 were negative ... negative for acid-fast staining organisms. Four fecal flotation examinati...

Initial Environmental Impact Assessment. 1991. J.M. Acero, J.L. Agraz, C.A. Aguirre and J. Plotz. Instituto Antartico Argentino and Alfred Wegener Institut ...

-- 116. Bhattachary, D. 1998. Enviromental values: a critical ap� praisal of cost�benefit analysis

Environmental impact assessment associated with the salvage operation of the ... Initial Environmental Impact Assessment. 1991. J.M. Acero, J.L. Agraz, C.A. ...

grant (FA9550-04-1-0117), an AFRL grant via Veridian and an NSF grant (IIS-0534707). We thank A. Acero

The purpose of the publication is to explain in an easy way the traditional process of steel manufacturing, and to promote the interest of the foundrymen working without large investment.

Many tropical fruits are rich in anthocyanins, though limited information is available about the characterization and quantification of these anthocyanins. The identification of anthocyanin pigments in four tropical fruits was determined by ion trap mass spectrometry. Fruits studied included acero...

High-quality, defect-free welds can be deposited in API Grade 5L X-80 line pipe with pulsed gas-metal-arc welding (GMAW) and shielded metal-arc welding (SMAW) processes. The newly developed Grade X-80 combines higher yield-strength pipe with thinner walls to reduce fabrication costs and improve some projects' economics. Use of X-80 pipe can yield as much as 7.5% cost savings over ...

Seawater is a complex corrosive system, and biofouling is one of the factors that influences corrosion processes. The behaviour of corrosion associated with the development of macrofouling was investigated during the first 6 months of the successional process. Three treatments were compared: the 'Control' treatment (absence of macrofouling); 'Community' treatment, and 'Barnacle' treatment, where ...

This work presents the results of ongoing investigations aimed at determining the influence of crystallographic texture on hydrogen-induced cracking (HIC) in low carbon steels for sour service piping. Electron backscatter diffraction (EBSD) and X-ray texture measurements have been performed on HIC samples of API 5L X46 and ASTM A106 ...

An extensive inspection and rehabilitation program on a 34-in. desert pipeline in gas-condensate service has restored the line to full operating pressures and ensured the line's active service life for at least 20 years. Since Agip Oil Co. Ltd. built the 133-km pipeline in 1972 using API 5L Grade X-60, it has suffered six ...

The Charpy V-notch (CVN) impact test is a method of characterizing a line-pipe material`s notch toughness and resistance to fracture growth. Although CVN testing of line pipe material is routine, test results are sometimes misinterpreted because of specimen size and load rate on actual toughness transition behavior. These effects are readily accounted for by a simple mathematical procedure, ...

The mechanical properties of submerged arc weldment (SAW) in gas transportation pipeline steel of grade API X65 (65 ksi yield strength) were investigated. This steel is produced by thermo mechanical control rolled (TMC), and is largely used in Iran gas piping systems and networks. The results from laboratory study on three different regions; i.e. base metal (BM), fusion zone (FZ) and heat affected ...

51 Cat's Cradle short. 0:32 Award Winning Music. Soft Mood Variety. Royalty free x. 52 Cat's Cradle long. 1:02 Award Winning Music. Soft Mood Variety ...

... (2kz 4 + 2kz 6 )4 xrw, x 52 = 1 + 2 o + (1 + (2z + 2kz 3 ) ojI + 21 ... r2 = 1 2 (16) At this time, the following definitions for the mass ...

A fine grain hodoscope to measure the position of showers in the outer (absolute value of x > 52cm) region of the E-705 electromagnetic calorimeter is described. The hodoscope is constructed with two layers of vertical conducting plastic tubes for the X p...

... has been shown to be CrN then the chromium precipitated is 0.09226 x 52/14 = 0.343%. ... found for iron nitrogen alloys. It is therefore necessary ...

cooker in good condition. $10. Cog. 3214858. Non-religious stained glass window~ . 30" x 42"- $175:36"x52"-$310. Damaged windows $2.50/ftz. Vending ...

The report describes the progress which occurred during the fifth quarter of a Research and Development contract to develop a 32 x 52 resolution element digital address, thin display tube for a man-pack radar. During this quarter the design and developmen...

Jun 25, 1982 ... Hydra Hoist boat hoist and parts, mornings to arrive at 8:30 a.m. and gold mirror, 25" x 52", $45. Call Lacy, story, fireplace, ...

... Sciaenidae Freshwater drum (Aplodinotus grunniens) TOTAL NUMBER OF SPECIES Juvenile/Adult c x x x x x x x x x x x x x �� � x 52 F ...

... 0X 41 2X 41 0X 44 0X 45 0X 50 8X 52 8X 52 0X 55 0X 54 0X 56 0X 58 0X 63 1 65 0X 66 0X 71 5X 73 0X 78 2X 79 0X 86 0 93 0 99 4X 101 0X 102 0X 102 1X 103 ...

's Doctorate 52.0301 Accountancy (520301) X X 09.0903 Advertising (090903) X 05.0201 African American Studies.0703 Art History (500703) X X 50.0702 Art, Studio Performance (500702) X 05.0103 Asian Studies (050103) X X.0409 Graphic Design (500409) X 54.0101 History (540101) X X 52.0901 Hotel/Hospitality Management (520901) X ...

can be included in modeling the language (Wang, 2000; Erdogan et al., 2002). In this article, we accuracy may indeed be two very different businesses after all. References Erdogan H. Sarikaya R. Gao Y

13 Oct 2010 ... El acero inoxidable es una aleaci?n (mezcla de hierro, n?quel y cromo), as? como lo es la mayor parte de la orfebrer?a (oro y n?quel). ...

In order to protect carbon steel of towers and piping of a GS experimental heavy water plant against corrosion produced by the action of aqueous solutions of hydrogen sulphide, a method, elsewhere published, was developed. Carbon steel exposed to saturate...

In order to protect carbon steel towers and piping of Girlder sulfide (G.S.) experimental heavy water plants against corrosion produced by the action of aqueous solutions of hydrogen sulfides, a method, previously published, was developed. Carbon steel, e...

The Atlas summarizes the experience of almost two decades of applied research in the siderurgical industry (IAS-CNEA joint agreements), by means of hot torsion test to evaluate the hot workability in steels through ductility properties and the formation s...

Within the framework of the development of low activation structural materials to be used in nuclear fusion reactors four martensitic Fe-9,5 Cr alloys were conceived with different contentsof tungsten-tantalum and/or germanium as substitutions for Mo, Ni,...

Ion nitriding is a glow discharge process that is used to induce surface modification in metals. It has been applied to 316-L austenitic stainless steel looking for similar benefits already obtained in other steels. An austenitic stainless steel was selec...

The relationship between the degree of sensitization and the corrosion resistance of austenitic stainless steel has been reported since long time, however this relationship does not account for all the experimental results reported on the literature. The ...

The main objective of the work was to determine the most common defects occuring in tool steels of the AISI D-2, S-1, 0-1 and W-2 series during thermal treatment. Defects were evaluated by metallographic analyses, a method used to determine and recognize ...

This is a theoretical-experimental laboratory study on the Electroslag Remelting Technology (ESRT) of high quality steels. The objective of this study was to analyze the problems that this technology entails and thus facilitate its industrial application ...

Maraging steel fabrication process metallurgy and cost effectiveness were investigated. Experimental melts were carried out in an induction furnace under argon atmosphere, and alternatively with vacuum remelting or direct induction melting under vacuum. A...

In this work, metallic coatings of nickel was made over carbon steel using two different electrolytic solutions: The Watts's bath and the nickel sulfamate bath, using a pulse variable current. The method use was the traditional method, its means a thermos...

The experimental study focused on the behavior of six different steels, of approximately 0.35% C and various contents of Cr, Ni, and Mo. Each of these steels were tested in order to determine its fatigue limit to 10 million cycles, in 5 different states (...

Sensitization is a cause of corrosion that has been widely studied in austenitic steels; however, the relationship between sensitization and mechanical properties of steel is less known. Therefore, the objective of this work is to study the mechanical pro...

Telemetry Systems, Isanti, MN, USA; Holohil Systems, Carp, ON, Canada). All radios were attached ventrally-knobbed hornbill Aceros cassidix during the non-breeding season. � In: Poonswad, P. (ed.), The Asian hornbills

The intergranular stress cracking of welded joints of austenitic stainless steel, AISI 304, is a serious problem in BWR type reactors. It is associated with the simultaneous presence of three factors; stress, a critical media and sensibilization (DOS). EP...

Corrosion susceptibility under stress of AISI 304 steel sensitized in a sodium thiocyanate solution has been studied and results were compared with those obtained with solutions of thiosulfate and tetrathionate. Sensitized steel type 304 is highly suscept...

The relationship between: microstructure-heat treatment, microstructure-mechanical properties, microstructure-corrosion resistance make that the study of the microstructure of metals and alloys be a powerful tool either in technical-scientific research as...

With this work it is demonstrated the possibility of performing the nitriding process by using a CVD-ECR source, based on the results obtained after treating several samples of AISI H-12 steel. Also, the main operating parameters (time of treatment, sampl...

The peak stress and the steady state values for free cutting, carbon and alloyed steels deformed at high temperatures were obtained in this paper as a result of two regressions. With these data and the peak deformation values obtained in a former work, st...

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...

'anodo de carb'on, reaccionando con 'el y produciendo di'oxido de carbono (ver [8]). En los ' ultimos a aislantes. Contiene un c'atodo formado por un bloque de carb'on atravesado por una barra de acero en cuyo

This paper is part of a series which corresponds to the carbon steel behaviour as construction material for Girlder sulfide (G.S.) heavy water plants. The present work analyses the iron concentration study during passivation in the passivating fluid. At t...

In heavy water plants that use the bithermal exchange H(sub 2)S-H(sub 2)O, a protective scale against corrosion is formed by the action of a solution of H(sub 2)S at high temperature for a tile between 10 to 14 days. Exposure to humid air during plant shu...

In order to protect carbon steel towers and piping of a GS experimental heavy water plant against corrosion produced by the action of aqueous solutions of hydrogen sulphide, a method, elsewhere published, was developed. Carbon steel exposed to saturated a...

The passivation on carbon steels, in particular ASTM A 516 Degree 60 and ASTM A 333 steels is made, submitting it to the action of H(sub 2)S/H(sub 2)O(sup 1,2) corrosive medium. The steel is rapidly corroded by H(sub 2)S in aqueous solution, forming iron ...

In order to protect carbon steel towers and piping of Girlder sulfide (G.S.) experimental heavy water plants against corrosion produced by the action of aqueous solutions of hydrogen sulfide, a method, previously published, was developed. Carbon steel, ex...

An ASTM A 516 degree 60 carbon steel superficial protection technique submitted to a hydrogen-water sulfide corrosive medium at 2 MPa of pressure and 40-125 deg C forming on itself an iron sulfide layer was tested. Studies on pH influence, temperature, pa...

This work describes the assays aimed to passivate the steel carbon of the process pipings. This steel is marked by the ASTM A 333 G6 and is chemically similar to those of isotopic exchange towers which corrode in contact with in-water hydrogen sulfide sol...

de la meteorizaci�n de una balsa de residuos pir�ticos Patricia Acero Salazar #12;Estructura del proyecto Evoluci�n flujo y transporte reactivo en zona no saturada de balsas de residuos pir�ticos residuo (Tailings) Presa Capa agua anti-oxidaci�nEvaporaci�n O2 Tongadas sucesivas #12;O2 #12;Objetivos del

would require low B-field (magnetic field damping after ... VHE �-rays. H.E.S.S. prelim. HESS VHE excess map. XMM map (2-4.5 keV) smoothed to HESS PSF preliminary ... B&W map: ATCA 1.4 GHz. Tian et al., ApJ 2008. Color map: H.E.S.S. �-ray excess ... Matching increase in absorption derived from 12CO observations ...

The susceptibility of a 17-4PH type steel to Stress Corrosion Cracking (SCC) in low pressure steam turbine environments was assessed using slow strain rate test at 90 Centigrade and at 1.35x10(sup -6) seg(sup -1). Environments tested included different co...

The most common and plesiomorphic mechanism of food transport in tetrapods is lingual-based. Neognathous birds use this mechanism for exploiting a large diversity of food resources, whereas paleognathous birds use cranioinertial mechanism with or without tongue involvement. Food transport in three hornbills' species (Aceros cassidix, A. undulatus, and Buceros hydrocorax) is ...

Modeling of strip deflected mode and thermal state in rolling is an integral part of the technology and perspective rolling-mill machinery such as plate mill 5000 of the OJSC ``Magnitogorsk Iron and Steel''. To comprehend metal behavior in the deformation zone in the rough passes during plate rolling it is essential to assess the impact of various temperature factors on variations in field of ...

Spread four has bugs in the cornfield--but not to worry. The bug referred to here is a mechanized welding bug, specifically a single welding head, computer-aided gas metal arc (GMAW) system from CRC-Evans Automatic Welding powered by a Miller Electric XMT{reg{underscore}sign} 304 inverter-based welding machine. The bug operator and owner of 32 inverters is Welded Construction, L.P., of ...

The effects of chemical compositions, rolling conditions, and homogenization treatment on hydrogen induced cracking (HIC) have been studied metallurgically using laboratory heats of chemical compositions corresponding to those of the center segregation zones in continuous cast slabs. The hardness of the center segregation zones in steel plates is one of the predominant factors affecting the HIC ...

... x23 + x24 + x25 + x26 n2Zh x31 + x32 + x33 + x34 + x35 + x36 n3Th X4 1 + x42 + x43 + x44 + x45 + X4 6 n4Zh X5 1 + x52 + x53 + X54 + x55 + x5 6 ...

The objective was to determine how storage structure affects alfalfa silage dry matter losses and quality. A study was conducted for two consecutive years. Each year, second cutting alfalfa was ensiled in one bunker silo (4.9 x 21 x 3.5 m), one pressed bag silo (2.4 x 52 m) and one oxygen-limiting s...

The report describes the work carried out during a two-year research and development contract to develop a feasibility-model 32x52 resolution-element thin-display tube (the DIGISPLAY) for a man-pack radar. The design and fabrication of an initial bell-jar...

Different cracking modes in a sour gas environment were observed. These modes were mainly related to the microstructure obtained during the manufacturing process of two API X52 microalloyed steels. A banded ferrite/pearlite microstructure was found to be susceptible to hydrogen effects, whereas an acicular ferrite with a grain boundary bainite/bainite ...

As complement to the experiences on carbon steel passivation for its use in G.S. (Girlder sulfide) heavy water production plants, the results herein obtained are given, processing the material with a saturated solution at 2.3 MPa of full pressure and 125 ...

... x08" "\\x8d\\x56\\x0c\\xb0\\x0b\\xcd\\x80\\x31\\xc0\\x31\\xdb\\xb0\\x01" ... x89" "\\x46\\x0c\\x89\\xf3\\x8d\\x4e\\x08\\x8d\\x56\\x0c\\x52\\x51\\x53" ...

A research project at the UNH Space Science Center is the development of GRAPE (Gamma RAy Polarimeter Experiment). An early objective of the program is the mechanical design for the next GRAPE science model. The goal of this new model was to significantly reduce the size of the detector housing. This was possible due to the development of a 52mm x 52mm 64 ...

It is known that carbon (C) steel pipelines can undergo cracking when exposed to stresses in soil. Slow strain rate tests of cold-worked X-52 carbon steel showed stress corrosion cracking (SCC) could be induced in dilute aqueous sulfate solutions at 50 C. The crack growth rate was of the same order of magnitude reported previously for carbonated solutions. ...

Bpressurevesselsteel51Pro,sin90Mixedandsheardominated1.52�1.570.19�1.68 Hastelloy-X52Pro,sin90,cro,ball23C:shear;649C of s are observed and range from 2.3 to 3.1. For mixed failure (1Cr�18Ni�9Ti stainless steel, Hastelloy-X LT I A X I A L FAT I G U E M O D E L Characteristic plane definition Multiaxial fatigue problem

This paper is a summary of the results from a study of the variables related to pressure reversal and was sponsored by the US Department of Transportation, Office of Pipeline Safety. The circumferential pipe stress, which is the most significant variable in pressure reversal, was examined by using tensile specimens and then relating the results to pressurized pipe. A model is proposed that gives ...

To provide surface cleaning of the CERN intersecting storage rings, in which the pressure is below 10/sup -10/torr over a 2 km length of mostly elliptical pipe (160 x 52 mm), ion bombardment during a glow discharge has been utilized. The discharge in argon at a pressure of about 3 x 10/sup -2/ torr was carried out intermittently in the course of a ...

Studies were conducted on the effect of cold work on stress corrosion cracking (SCC) of API X52 steel. For comparison, measurements were made on specimens with no notch and that were not cold-worked. The time to failure of cold-worked specimens was always shorter than that of the as-received specimens. Hydrogen content in the cold-worked steel was always ...

The overall objective of the work on Task 003 of Subcontract 9-X52-W7423-1 was to provide LANL with support to the DOE Defense Program (DP) Safety Programs. The effort included the identification of appropriate safety requirements, the refinement of a DP-specific Safety Analysis Report (SAR) Format and Content Guide (FCG) and Comprehensive Review Plan ...

The electron paramagnetic resonance (EPR) parameters (g factors and hyperfine structure constants of the ground state, and g factors of the first excited state) of three (one cubic and two trigonal) Er(3+) centers in fluoride-type ThO(2) crystal are studied from a diagonalization (of energy matrix) method. In the method, the Zeeman and hyperfine interaction terms are added to the classical ...

This conclusion of a three-part series updating causes of pipeline failures addresses failures due to stress-corrosion cracking (SCC), mechanical damage, and anaerobic bacterial corrosion. These causes, along with hydrogen effects comprise a shift in pipe service problems evident in failures reported since 1979. This shift was identified in a major study by Battelle Columbus Division laboratories. ...

Hydrogenation of C60 at 2 GPa and 723 823 K was performed with thermal decomposition of LiAlH4 as a hydrogen source. Analysis of hydrogenation products showed that the method can produce not only C60H36, but also hydrofullerides C60Hx with 44 < x < 52. Unlike other hydrogenation methods in which pristine C60 reacts with hydrogen, the high ...

It is shown by Hall measurements that quenching complexly doped Ge1 ? x Si x (0 ? x ? 0.20) crystals from 1050-1080 K leads to the formation of additional electroactive acceptor centers in them. The activation energy of these centers increases linearly with an increase in the silicon content in the crystal and is described by the relation E {/k x } = ...

This work presents the results of multiple weld repairs in the same area in seamless API X-52 microalloyed steel pipe. Four conditions of shielded metal arc welding repairs and one as-welded specimen of the girth weld were characterized to determine changes in the microstructure, grain size in the heat affected zone, and to evaluate their effect on the ...

New developments with bainite have resulted in a steel with an ultimate tensile strength of 1.7-2.5 GPa and a toughness in excess of 30-40 MPa m1/2. The novel microstructure is generated in a high carbon high silicon steel isothermally transformed at temperatures of 200 C-350 C. Iron does not diffuse during the transformation to bainite at this low temperature. As a result, 20-40 nm thick plates ...

A liquid bridge is a mass of liquid sustained by the action of the surface tension force between two parallel supporting disks Apart from their basic scientific interest a liquid bridge can be considered as the simplest idealization of the configuration appearing in the floating zone technique used for crystal growth and purification of high melting point materials footnote Messeguer et al emph ...

Schwertmannite, an iron oxyhydroxide sulfate nanomineral, plays a significant role in the geochemistry of acid mine drainage (AMD) as a metastable phase with respect to goethite and by retaining toxic metals, e.g. arsenic [1]. Schwertmannite�s characteristic morphology is needles 100-300 nm long and only 5-10 nm in diameter extending from a dense aggregate. The poorly-and nano-crystalline nature ...

BackgroundAlthough nowaday it is broadly accepted that mitochondrial DNA (mtDNA) may undergo recombination, the frequency of such recombination remains controversial. Its estimation is not straightforward, as recombination under homoplasmy (i.e., among identical mt genomes) is likely to be overlooked. In species with tandem duplications of large mtDNA fragments the detection of recombination can ...

We present a preliminary study on the design of a high sensitivity small animal DOI-PET scanner: jPET-RD (for Rodents with DOI detectors), which will contribute to molecular imaging. The 4-layer DOI block detector for the jPET-RD that consists of scintillation crystals (1.4 mm x 1.4 mm x 4.5 mm) and a flat panel position-sensitive photomultiplier tube (52 mm x ...

The International X-Ray Observatory (IXO) is under formulation by NASA, ESA and JAXA for deployment in 2022. IXO emerged over the last 18 months as the NASA Constellation-X and ESA/JAXA X-Ray Evolving Universe Spectrometer (XEUS) missions were combined. The driving performance requirements for the X-Ray Microcalorimeter Spectrometer (XMS) are a spectral resolution of 2.5 eV over the central ...

Different observation data for cool star - Procyon (Obs_IDs of 63, 1461 and 1224) available from Chandra Public Data Archive were co-added and analysed. Emissivities of emission lines of highly charged silicon ions (SiVII-SiXII) were calculated over temperatures by adopting the published data of Liang et al.. Using the emission measure derived by Raassen et al., the theoretical line fluxes are ...

Schistosoma kisumuensis n. sp. is described based on 6 adult males and 2 adult females collected from the circulatory system of 3 murid rodent species, Pelomys isseli, Mastomys natalensis, and Dasymys incomtus. Specimens were collected from a single location, Nyabera Swamp, in Kisumu, Kenya in the Lake Victoria Basin. This new species is morphologically similar to members of the S. haematobium ...

Candidate construction materials for pressure vessels, heat exchangers, and piping exposed to the highly corrosive alkaline leachant/coal-derived sulfur combination in the Battelle Hydrothermal Coal Treatment Process were tested in aqueous slurries of high-sulfur coal with alkaline leachant, i.e., 8.5% sodium carbonate or 6.5% lime/8% sodium hydroxide at 300/sup 0/C. No SCC or general corrosion ...

Candidate construction materials for pressure vessels, heat exchangers, and piping exposed to the highly corrosive alkaline leachant/coal-derived sulfur combination in the Battelle Hydrothermal Coal Treatment Process were tested in aqueous slurries of high-sulfur coal with alkaline leachant, i.e., 8.5% sodium carbonate or 6.5% lime/8% sodium hydroxide at 300 C. No SCC or general corrosion occurred ...

The number density n sub d of the first excited level of krypton is determined during the ionization relaxation through the time-resolved absorption spectroscopy of the Kr I line 1s5 - 2p9 at a wavelength of 811.3 nm. Using a 1-m grating monochromator and a pulsed continuous background, light source densities between 2 x 10 to the 15th/cu m and 2 x 10 to the 18th/cu m are measured. Simultaneously, ...

The emphasis on deep water drilling in offshore exploration has seen continued developments in the preparation, handling, operation, and maintenance of bouyant risers. In 1975, Esso Australia Ltd. completed a five-well drilling program off the South Coast of Australia using the drill ship Regional Endeavour. The depth of water in three of these wells was over 800 ft with two wells in the Otway ...

To characterize microvascular function, candidate risk pathways, and metabolic syndrome prevalence in women with cardiac syndrome X, 52 nondiabetic women with angiographically normal epicardial arteries but >1 mm of planar ST depression during exercise testing (patients) and 24 healthy controls of similar age were recruited. In addition to fasting blood ...

Interleukin (IL)-6 is an inflammatory mediator involved in bone resorption. G/C polymorphism at position -174 of the IL-6 gene has been reported to influence IL-6 expression, with the G allele associated with higher expression levels. The aims of this study were to investigate the expression of IL-6 as well as the incidence of IL-6 (-174) gene polymorphism and their correlation to the severity of ...

A prototype of a clinical scanned-slot digital mammography imaging system has been developed, which demonstrates better contrast sensitivity and latitude than current state-of-the- art film-screen mammography systems. The detector consists of a Gd2O2S:Tb phosphor screen coupled via a 2-to-1 demagnifying fiber-optic taper to two time-delay integration (TDI) charge-coupled device (CCD) image arrays. ...

Experimental microcosms (40 X 52 X 32 cm) containing an assemblage of eight tallgrass prairie grass and forb species in native prairie soil were maintained under mycorrhizal (untreated control) or mycorrhizal-suppressed (fungicide-treated) conditions to examine plant growth, demographic, and community responses to mycorrhizal symbiosis. The fungicide ...

Abstract The whole life cycle of Hepatozoon hemprichii sp. nov. was discussed in the vertebrate host Scincus hemprichii and the vector Hyalomma impeltatum. Erythrocytic stages of 18+1.8 x 4+0.8 ?m developed in the haemocoel of ticks to sporozoites within 16-18 days. Schizogony occurred in the liver parenchyma and the endothelial cells of blood capillaries in lung and spleen. Mature schizonts of ...

This paper reports evaluation of compact forceps manipulator designed for assisting laparoscopic surgery. The manipulator consists of two miniaturized parts; friction wheel mechanism which rotates and translates forceps (62 x 52 x 150[mm3], 0.6 [kg]), and gimbals mechanism which provides pivoting motion of forceps around incision hole on the abdomen (135 x ...

The information in the Inorganic Crystal Structure Database (ICSD) can be used to determine the structures of new compounds by analogy; this database is thus a useful tool for practical problem solving. A model for the structure of (NH(4))Fe(CO(3))(OH)(2) [Cmcm, a = 6.6154 (6), b = 12.0639 (10), c = 6.0263 (5) A, Z = 4] was found by searching the ICSD for compounds with C-centered orthorhombic ...

Models for ocean chemistry indicate that anthropogenic input of CO2 will decrease seawater pH and the concentration of carbonate ion. This should cause dissolution of pelagic carbonate on the seafloor and may reduce biogenic calcification. Stable carbon isotope records spanning the Late Paleocene and Early Eocene show a series of pronounced negative excursions (CIEs) interpreted as massive inputs ...

To cite this article: Sumitha E, Jayandharan GR, David S, Jacob RR, Sankari Devi G, Bargavi B, Shenbagapriya S, Nair SC, Abraham A, George B, Viswabandya A, Mathews V, Chandy M, Srivastava A. Molecular basis of Bernard-Soulier syndrome in 27 patients from India. J Thromb Haemost 2011; 9: 1590-8. Summary.? Background:? Bernard-Soulier syndrome (BSS) is an extremely rare (1:1?million) bleeding ...

Ultraviolet resonance line profiles of rapidly-rotating near main-sequence B stars indicate that the two-dimensional ionization structure of the circumstellar envelope can be crucial to our understanding of the mass-loss rate. We investigate these two-dimensional effects through the use of a radiation transfer model to construct piece-wise spherical ionization fractions for the wind-compressed ...

We report the results of longslit spectroscopy of the wind-blown bubble and photoevaporating knots around the O6.5iiif star BD+ 60(deg) 2522 made with the Space Telescope Imaging Spectrograph. The Of star is the primary ionizing source for the H ii region NGC 7635, located in the Perseus Arm. The spectra were taken through a 0.2'' x 52'' slit with low and ...

Multicomponent Zr-based bulk metallic glasses are the most promising metallic glass forming systems. They exhibit great glass forming ability and fascinating mechanical properties, and thus are considered as potential structural materials. One potential application is that they could be replacements of the depleted uranium for making kinetic energy armor-piercing projectiles, but the density of ...

Abigail Alvarez OlarteCINVESTAV Alba Leticia Carrillo MonteverdeDCI-UG Alberto Carrami�anaINAOE Aldo MorselliFERMI Alejandro CastillaDCI-UG Alejandro IbarraTechnical University of Munich Alma D Rojas PachecoFCFM-BUAP Alma Xochitl Gonzalez MoralesInstituto de Ciencias Nucleares, UNAM Andrew Walcott BeckwithAmerican Institute of Beam Energy Physics Ariadna Montiel ArenasDepartamento de F�sica, ...