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...

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...

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...

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...

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 ...

'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

Bienvenidos al Sitio de Preparación y respuesta para casos de emergencia. Pase directamente al índice de navegación o al contenido. CDC en Español Acerca de los CDC Medios de...

herramientas adecuadas. Refiérase siempre al manual del propietario cuando realice ajustes secundarios o le de servicio a los aparatos de combustión. Nunca opere un generador...

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

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 ...

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...

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...

Omita y vaya al Contenido MedlinePlus Información de salud para usted Un servicio de la Biblioteca Nacional de Medicina de EE.UU. Desde los Institutos Nacionales de la Salud...

Corrosion resistance test results of copper alloy metal meshes, used in beam impact tests, are summarized. The use of a painting system is advised to avoid corrosion appearance in the metal meshes during an aircraft's service lifetime.

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 ...

troficas de las larvas de peces. -Distribucion y remineralizacion del carbono organico disuelto (COD) y el carbono organico particulado ...

libre. Nunca las use en el interior del hogar o en el garaje. Ellas pueden producir niveles mortales de monóxido de carbono. Consejos de seguridad para proteger su familia...

Se ha agregado un material compuesto reforzado carbono-carbono a los bordes de ataque de las aletas verticales del veh?culo para manejar las altas ...

... 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...

daily ambient exposures to toxic and criteria air pollutants Air pollution and daily hospital admissions in metropolitan Los Angeles Patterns of asthma mortality in Philadelphia...

En Espanol: Cultivos microbianos capaces de crecer en hidrocarburos como unica fuente de carbono aislados de ambientes contaminados. ...

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...

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 ...

28 May 2011 ... El Especialista de Misiones Mike Fincke terminar? su trabajo con el Ensamblaje de Eliminaci?n de Di?xido de Carbono (CDRA) mientras que ...

27 May 2011 ... Los especialistas de misiones Mike Fincke y Greg Chamitoff reemplazar?n uno de las bases del Ensamblaje de Eliminaci?n de Di?xido de Carbono ...

e interesantes hojas de trabajo para ayudar a los alumnos a concienciarse sobre el medio ambiente. Visita la Lecci�n: Calculadora de la Huella de Carbono ...

15 Dic 2004... aparatos y sistemas con propiedades y funciones novedosas por su ... de carbono son extremadamente eficientes para transferir calor, ...

* en interiores * en exteriores Pesticidas Radón Rayos ultravioletas y el �ndice de Calidad de Aire * Frontera 2012: Programa ambiental México-EE.UU. en inglés * Vieques en...

28 Jul 2003 ... En la nueva era de responsabilidad y administraci?n mundial del carbono, necesitamos un m?todo preciso para determinar cuanto di?xido de ...

hogar Si una persona inhala el tóxico, llévela inmediatamente a donde pueda respirar aire fresco y busque ayuda médica enseguida. PREVENCI�N Instale un detector de monóxido...

Contaminación del Aire y Salud Respiratoria Asma Datos Básicos sobre el Asma Calidad del Aire y Fuegos Protéjase y proteja a su familia contra el humo de los escombros Moho...

Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options CDC Home CDC 24/7: Saving Lives....

Contaminación del Aire y Salud Respiratoria Asma Datos Básicos sobre el Asma Calidad del Aire y Fuegos Protéjase y proteja a su familia contra el humo de los escombros Moho...

16 Jun 2011... muchos procesos industriales, han incrementado los niveles de bioxido de carbono en la atmosfera a una concentracion arriba de lo normal. ...

20 Feb 2000 ... Tambi?n miden la proporciones de los diferentes iones del viento ... y de helio "ligero", as? como carbono, ox?geno y otros elementos. ...

13 Ago 2010 ... Dependen de otros. Las plantas utilizan la luz solar, el bi?xido de carbono y minerales para crear compuestos org?nicos (az?cares, prote?nas, ...

... de The Nature Conservancy para contribuir con informatici�n y perspectivas sobre temas claves relacionados con los bosques y el cambio clim�tico....

Quien adquiere una casa hoy día, está mucho más preocupado por la calidad del aire en el interior de su hogar. El moho, el radón, el monóxido de carbono y los...

13 Oct 2010... enlaces entre las mol?culas presentes en el hielo -- de este modo las mol?culas llegan a convertirse en complejos compuestos de carbono. ...

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 ...

O conhecimento das propriedade f�sicas das condensa��es das nuvens escuras e sua rela��o com a din�mica das n�vens � um dos caminhos para o entendimento dos mecanismos de forma��o de estrelas de massas pequenas. Nesse trabalho, 8 condensa��es da nuvem escura do Escorpi�o foram observadas atrav�s de transi��es das mol�culas de 13CO, C18O e NH3, utilizando-se os ...

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). ...

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 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...

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...

The stratigraphic distribution of paleosols in fluvial successions has been investigated from the lower to middle Miocene of the Digne Valensole Foreland basin (SE France). The paleosols are present all along the sections and developed either on alluvial deposits, shallow lacustrine carbonates or shallow marine silt. The carbon and oxygen isotopic values from the pedogenic carbonate have been ...

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...

Concentrations of carbon monoxide were measured in air samples gathered approximate to the surface, during participation in the scientific GTE/ABLE-2B to the Amazon. The presence of a large quantity of organic mass concentrated under the vegetative canopy...

inglés You are here: EPA Home Air Indoor Air Quality Publications Proteja su vida y la de su familia: Evite el envenenamiento con monóxido de carbono Proteja su vida y la de su...

The results about niobium electrodeposition over carbon steel from K sub(2) Nb F sub(7) solutions, on LiF-Na F-KF eutetic at 750 sup(0)C and over the corrosion resistance of obtainment deposit from acid media are presented. (author). (Atomindex citation 2...

There is a question concerning the role of agricultural practices on carbon sequestration enhancement. By producing biomass with agricultural crops and adding this residue to soil, it should act on the mitigation process of the greenhouse effect, especially CO2. The objectives of this study were to ...

This work is intended to test and evaluate how well a regional biogeochemical model is able to represent the major processes of the hydrologic and carbon cycles of forest ecosystems of conifers, growing in three different climatic areas in Brazil. The mod...

mercurio X Calor X X Radar militar X Kepone** X Vapor de bromo** X X X Radiación** (Chernobyl) X X X X Disulfuro de carbono X �cido 2,4-diclo-rofenoxiacético X X *Los estudios...

9 Ago 2007... observ? Lemke, agregando que el bi?xido de carbono tendr?a una reflectividad diferente, lo que permitir?a identificarlo tambi?n. ...

10 Ene 2001 ... Estudios recientes donde se utiliz? la proporci?n de differentes is?topos del carbono para estimar el per?odo geol?gico en el que se origin? ...

13 Ago 2010... los componentes del az?car en dos meteoritos ricos en carbono (? "carb?nicos "). ... (Un is?topo es uno de dos o m?s ?tomos cuyos n?cleos tienen el mismo n?mero de protones pero diferente n?mero de neutrones). ...

... is�topos estables de nitr�geno (?15N), carbono (?13C) y azufre (?34S) en muestras de dos colonias de cr�a: ... two gull species from the western Mediterranean. Chemosphere 31:3397�3411. CrossRef, PubMed, ...

very large orbital variations (Milankovitch Cycles), and the possible relevance of these to climate to Milankovitch Cycles � see below). Evidence for the active influence of Milankovitch-type cycles includes a thin role in the formation of outflow channels. D. MILANKOVITCH CYCLES As on Earth, Mars' orbital elements

The Kyoto Protocol is an agreement among many of the world¿s nations to, among other things, reduce atmospheric carbon dioxide concentrations in order to reduce global warming. One potential method to do so is to sequester carbon in soils. This has had the effect of stimulating the establishment of ...

The use of bonded Tedlar layers to protect both sides of carbon fiber composite components forming a wing edge is investigated. Painting tests were carried out using specimens covered with Tedlar bonded layers. The steps of polyurethane painting are descr...

A method carbon/hydrogen ratio (C/H) determination in hydrocarbons and its mixtures was improved using the electron backscattering technique. Besides the hetero atoms (S,O and N) influence in petroleum is studied for being able to determinate the C/H rati...

A method for the determination of Carbon-14 ((sup 14)CO(sub 2)) in environmental samples has been developed. The method uses the direct absorption of the carbon dioxide into Carbosorb, followed with incorporation of the mixture (Carbosorb-CO(sub 2)) to th...

13 Oct 2010 ... Por el momento el di?xido de carbono se remueve del aire con una m?quina ... Los filtros de carb?n activado son el m?todo principal para ...

The title mol�ecule, C₁₇H₁₈N₄S, is not planar, as indicated by the dihedral angle of 27.24?(9)� between the two benzene rings. In the crystal, inter�molecular N�H?S hydrogen bonds link pairs of mol�ecules into inversion dimers.

Natural lithium, polyethylene, and aluminum targets were bombarded with 28.1 Mev deuterons. The outgoing particles were analyzed with a scintillation spectrometer. The angular distributions for the following processes were measured: Li(d,d')Li, Li/sup 7/(d,d')Li/sup 7*/ -4.61 Mev, Li/sup 7/(d,t) Li/su p 6/, Cr/sup 12/(d,d')C/sup 12/, C/sup ...

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

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 ...

The aim of this work is the study of the electronic transport properties in several structures made of carbon nanotubes. This dissertation is divided in four chapters: (1) Chapter 1: Carbon Nanotubes. This chapter is a brief review of the foundations of carbon nanotubes (CNT). Main properties of CNT are explained. The subject developed here is important for the understanding of the results ...

En Astrof�sica podemos encontrar numerosos contextos en los cuales se observan mol�culas en estado s�lido que, en condiciones est�ndar de presi�n y temperatura, se encontrar�an como gases o l�quidos. Dichas mol�culas se denominan hielos y han sido observadas en nubes densas del medio interestelar, en envolturas circumestelares, en sat�lites del Sistema Solar, en cometas, etc. ...

Los pulmones son un par de órganos respiratorios de forma cónica que se encuentran en el pecho. Los pulmones incorporan el oxígeno en el cuerpo cuando se inhala y eliminan dióxido de carbono cuando se exhala. Cada pulmón tiene secciones llamadas lóbulos. El pulmón izquierdo tiene dos lóbulos mientras que el pulmón derecho, que es ligeramente más grande, tiene tres. ...

Using a model Hamiltonian approach including electron Coulomb interactions, we systematically investigate the electronic structure and magnetic properties of chiral graphene nanoribbons. We show that the presence of magnetic edge states is an intrinsic feature of any smooth graphene nanoribbons with chiral edges, and discover a number of structure-property relations. Specifically, we describe how ...

Se presentan resultados observacionales de un estudio de la distribuci�n de hidr�geno neutro en los alrededores de estrellas Wolf-Rayet (WR) gal�cticas. Los datos de la l�nea de 21 cm provienen de observaciones de resoluci�n angular intermedia (9') tomadas con el radiotelescopio de Effelsberg. La muestra est� compuesta por cuatro WR de la serie del nitr�geno (WN): WR130, WR131, ...

Ecosystems and Global Change in the Context of the Neotropics; Medell�n, Colombia, 19-20 May 2010; Research in most areas of global environmental change is overwhelmingly produced outside developing countries, which are usually consumers rather than producers of the knowledge associated with their natural resources. While there have been important recent advances in understanding the causes of ...

The intensity of agriculture has increased significantly during the past 30 years, resulting in increased detection of agricultural contaminants (nutrients, pesticides, salts, trace elements, and pathogens) in groundwater. Till, glaciolacustrine, and loess deposits of Quaternary age compose the most common surficial deposits underlying agricultural areas in North America. Quaternary aquitards ...

Geochemical reaction models were evaluated to improve radiocarbon dating of dissolved inorganic carbon (DIC) in groundwater from confined parts of the Upper Floridan aquifer in central and northeastern Florida, USA. The predominant geochemical reactions affecting the 14C activity of DIC include (1) dissolution of dolomite and anhydrite with calcite precipitation (dedolomitization), (2) sulfate ...

Groundwater from the Palaeogene aquifer system in north-eastern Syria has been studied using chemical and isotopic methods to determine the effects of carbonate dissolution, sulphate reduction and geogenic CO2 incorporation in the dilution of 14C activity, and later to correct the conventional 14C water ages. The reason for this non-classical approach of correction is because the groundwater in ...

... keywords:, data, dr mmc, mmc, mmc data, (al2o3)p/al, (al2o3)p/al-mg, al alloys, al-mg matrix, al2o3 particulates, al2o3/al, al2o3/al-mg, ...