Preparation and reactions of some lower tungsten halides and
... On the other hand, only little interest has been shown in the lower halides of tungsten. ...
... On the other hand, only little interest has been shown in the lower halides of tungsten. ...
A Review of Surface Analysis Techniques for the
... also serves as a regular reviewer for more than 50 scientific journals and research funding agencies. (http://www.tuc.gr/konsolakis.html) ...
... also serves as a regular reviewer for more than 50 scientific journals and research funding agencies. (http://www.tuc.gr/konsolakis.html) ...
Low Temperature Precursors for SnOx Thin Films
... numerous discussions and also sorting out the crystals that were investigated by X-ray diffraction - including all of the duds. Thanks go to the both EPSRC for funding me through the DTC in sustainable chemical technologies and SAFC Hi-Tech who provided financial assistance and advice. In particular ...
... numerous discussions and also sorting out the crystals that were investigated by X-ray diffraction - including all of the duds. Thanks go to the both EPSRC for funding me through the DTC in sustainable chemical technologies and SAFC Hi-Tech who provided financial assistance and advice. In particular ...
Ozone decomposition
... When the ozone concentration exceeds 15–20% it has a blue color. At atmospheric pressure and temperature of 161.3 K, the ozone becomes fluid and is of deep blue color. It cures at 80.6 K by acquiring a dark purple color (Lunin et al., 1998). Ozone is explosive in all three physical conditions. Work ...
... When the ozone concentration exceeds 15–20% it has a blue color. At atmospheric pressure and temperature of 161.3 K, the ozone becomes fluid and is of deep blue color. It cures at 80.6 K by acquiring a dark purple color (Lunin et al., 1998). Ozone is explosive in all three physical conditions. Work ...
REVIEWS Environmental remediation by photocatalysis R. Vinu AND Giridhar Madras
... Journal of the Indian Institute of Science VOL 90:2 Apr–Jun 2010 journal.library.iisc.ernet.in ...
... Journal of the Indian Institute of Science VOL 90:2 Apr–Jun 2010 journal.library.iisc.ernet.in ...
08 Redox Reactions
... Many metals, including those which do not react with cold water, are capable of displacing hydrogen from acids. ...
... Many metals, including those which do not react with cold water, are capable of displacing hydrogen from acids. ...
CURRENT TRENDS IN WELDING PROCESSES AND MATERIALS
... Abstract. Demands for improved productivity, efficiency, and quality pose challenges to the welding industry. As materials become ever more sophisticated in their chemical composition to provide ever-better functionally specific properties, a more complete and precise understanding of how such mater ...
... Abstract. Demands for improved productivity, efficiency, and quality pose challenges to the welding industry. As materials become ever more sophisticated in their chemical composition to provide ever-better functionally specific properties, a more complete and precise understanding of how such mater ...
Catalytic oxidation of ammonia to nitrogen
... soda production, SCR process and nitric acid production, produce emission streams containing ammonia. These streams usually contain excess O2, H2O and very low concentrations of NH3 (<1000 ppm). The conventional method for NH3 removal is again by acid scrubbing. It should be pointed out that the aci ...
... soda production, SCR process and nitric acid production, produce emission streams containing ammonia. These streams usually contain excess O2, H2O and very low concentrations of NH3 (<1000 ppm). The conventional method for NH3 removal is again by acid scrubbing. It should be pointed out that the aci ...
Heterogeneous Catalysis and Solid Catalysts
... the catalyst or a reactant during the reaction. This can take place in a homogeneous or heterogeneous system. One example is the utilization of semiconductor catalysts (titanium, zinc, and iron oxides) for photochemical degradation of organic substances, e.g., on selfcleaning surfaces. In biocatalys ...
... the catalyst or a reactant during the reaction. This can take place in a homogeneous or heterogeneous system. One example is the utilization of semiconductor catalysts (titanium, zinc, and iron oxides) for photochemical degradation of organic substances, e.g., on selfcleaning surfaces. In biocatalys ...
TR-00-13 - Svensk Kärnbränslehantering AB
... has a stronger tendency to accumulate in a corrosion pit than chloride, nitrate and hydrogen carbonate. The stabilisation of the aqueous +II oxidation state is therefore stronger in a corrosion pit than in the bulk solution. High sulphate concentration in the water is detrimental with respect to pit ...
... has a stronger tendency to accumulate in a corrosion pit than chloride, nitrate and hydrogen carbonate. The stabilisation of the aqueous +II oxidation state is therefore stronger in a corrosion pit than in the bulk solution. High sulphate concentration in the water is detrimental with respect to pit ...
A New Synthetic Method for Nanoscale Metal-
... including epilepsy, chlorosis and anthrax. Activated carbon is the result of the pyrolysis of organic matter, usually wood, peat or even coconut shells. This pyrolysis gives rise to inorganic carbon with pores in its structure. Since its first discovery, the process has lived a strong evolution and ...
... including epilepsy, chlorosis and anthrax. Activated carbon is the result of the pyrolysis of organic matter, usually wood, peat or even coconut shells. This pyrolysis gives rise to inorganic carbon with pores in its structure. Since its first discovery, the process has lived a strong evolution and ...
Thermal Decomposition of the Non-Interstitial Hydrides for the
... many advances in hydrogen production8 and utilization technologies have been made during the past decade. However, there remain a number of fundamental scientific, technological, and socio-economic problems to be overcome before any large-scale utilization of hydrogen in our day-to-day human activit ...
... many advances in hydrogen production8 and utilization technologies have been made during the past decade. However, there remain a number of fundamental scientific, technological, and socio-economic problems to be overcome before any large-scale utilization of hydrogen in our day-to-day human activit ...
Brønsted Acidity in Metal−Organic Frameworks
... containing several different kinds of metal ions within one SBU83 is highly desirable for developing stronger Brønsted acids based on bridging hydroxyl groups. Water molecules bound to metal sites could also result in Brønsted acidity, as exemplified by MIL-100.84,85 Mediumstrength Brønsted acidic sit ...
... containing several different kinds of metal ions within one SBU83 is highly desirable for developing stronger Brønsted acids based on bridging hydroxyl groups. Water molecules bound to metal sites could also result in Brønsted acidity, as exemplified by MIL-100.84,85 Mediumstrength Brønsted acidic sit ...
"Cyano Compounds, Inorganic," in: Ullmann`s Encyclopedia of
... The reaction of hydrogen cyanide with chlorine gives cyanogen chloride (see Section 4.2). For industrial purposes, the latter compound is usually directly trimerized to cyanuric chloride, the starting material for the chemistry of s-triazines. In the presence of oxygen or air, hydrogen cyanide burns ...
... The reaction of hydrogen cyanide with chlorine gives cyanogen chloride (see Section 4.2). For industrial purposes, the latter compound is usually directly trimerized to cyanuric chloride, the starting material for the chemistry of s-triazines. In the presence of oxygen or air, hydrogen cyanide burns ...
Corrosion of Ceramic and Composite Materials, Second Edition
... liquid phase sintering (also crystal growth studies) and the dissolution of various raw materials in molten glass in the manufacture of glass products. The proper selection of materials and good design practices can greatly reduce the cost caused by corrosion. To make the proper selection, engineers ...
... liquid phase sintering (also crystal growth studies) and the dissolution of various raw materials in molten glass in the manufacture of glass products. The proper selection of materials and good design practices can greatly reduce the cost caused by corrosion. To make the proper selection, engineers ...
Spillover in Heterogeneous Catalysis - ACS Publications
... many catalytic reactions involve hydrogen. Moreover, hydrogen spillover is the fastest spillover process, and Hz adsorption is the most common method to measure the surface area of supported metal catalysts. If significant H spillover takes place during surface area measurements, then WM ratios (num ...
... many catalytic reactions involve hydrogen. Moreover, hydrogen spillover is the fastest spillover process, and Hz adsorption is the most common method to measure the surface area of supported metal catalysts. If significant H spillover takes place during surface area measurements, then WM ratios (num ...
Beryllium: Properties and Applications Laura Coyle I. Introduction
... In Hot Isostatic Pressing (HIP) pressure is applied to the powder hydrostatically using a hot gas rather than mechanically. Complex mirror shapes are produced using mandrels or molds, often made from copper. The beryllium powder is packed inside the mold and enclosed in a steel can. The powder is ou ...
... In Hot Isostatic Pressing (HIP) pressure is applied to the powder hydrostatically using a hot gas rather than mechanically. Complex mirror shapes are produced using mandrels or molds, often made from copper. The beryllium powder is packed inside the mold and enclosed in a steel can. The powder is ou ...
D--All Websites-eChemistryHelp-.mdi
... 1. The definition : Oxidation number of an element in a particular compound represents the number of electrons lost or gained by an element during its change from free state into that compound or Oxidation number of an element in a particular compound represents the extent of oxidation or reduction ...
... 1. The definition : Oxidation number of an element in a particular compound represents the number of electrons lost or gained by an element during its change from free state into that compound or Oxidation number of an element in a particular compound represents the extent of oxidation or reduction ...
Localized surface plasmon-enhanced near
... was calculated as 41.0 and 38.9 nm for SP-QW coupling, respectively, at an NUV emission wavelength of 406 nm when the real parts of the dielectric constants for GaN and metal were used [17, 18]. However, Jang et al. showed that the penetration depth of Ag NPs surrounded by dielectric materials is es ...
... was calculated as 41.0 and 38.9 nm for SP-QW coupling, respectively, at an NUV emission wavelength of 406 nm when the real parts of the dielectric constants for GaN and metal were used [17, 18]. However, Jang et al. showed that the penetration depth of Ag NPs surrounded by dielectric materials is es ...
Full Text
... remain rare despite their potential to afford new topologies,[17] and to the best of our knowledge, none are versatile enough to serve as platforms. We believe that this is largely related to the difficulties associated with controlling the stoichiometry and order of self-assembly of three or more d ...
... remain rare despite their potential to afford new topologies,[17] and to the best of our knowledge, none are versatile enough to serve as platforms. We believe that this is largely related to the difficulties associated with controlling the stoichiometry and order of self-assembly of three or more d ...
Chem Soc Rev
... resource, a major component of natural gas, coal-bed gas and shale gas, but also from a variety of renewable sources as biogas,14 could provide an economical and sustainable alternative to petroleum. Furthermore, methane is one of the most destructive greenhouse gas. Thus, the transformation of meth ...
... resource, a major component of natural gas, coal-bed gas and shale gas, but also from a variety of renewable sources as biogas,14 could provide an economical and sustainable alternative to petroleum. Furthermore, methane is one of the most destructive greenhouse gas. Thus, the transformation of meth ...
Abstract - ASU Physics
... young age. His parents claim that he was a handful and always getting into trouble. The problem, however, was that he rarely got punished because he could always end up making his mother laugh. This gift of his was and still is the core of his personality. As a child, the author moved several times ...
... young age. His parents claim that he was a handful and always getting into trouble. The problem, however, was that he rarely got punished because he could always end up making his mother laugh. This gift of his was and still is the core of his personality. As a child, the author moved several times ...
A Dictionary of the New Chymical Nomenclature
... Vitriolic acid Oil of vitriol Spirit of vitriol ...
... Vitriolic acid Oil of vitriol Spirit of vitriol ...
Hydrogenation of Oriented Monolayers of o
... surface of a foil reduced at high temperature was replicated and examined at higher resolution by transmission electron microscopy (Figure 3). This figure shows the intersection of three grains. The broad dark and light striations are probably artifacts of uneven shadowing. A large number of small f ...
... surface of a foil reduced at high temperature was replicated and examined at higher resolution by transmission electron microscopy (Figure 3). This figure shows the intersection of three grains. The broad dark and light striations are probably artifacts of uneven shadowing. A large number of small f ...
EFFECT OF LEWIS ACID IN TiCl4/MgCl2/THF/AlCl3 CATALYST
... The Ziegler-Natta (ZN) catalyst system for ethylene polymerization by combinations of transition metal and organometallic compound has been discovered since 1950s. In general, heterogeneous ZN catalyst is based on titanium chloride supported on magnesium dichloride (TiCl4/MgCl2). MgCl2 is suitable s ...
... The Ziegler-Natta (ZN) catalyst system for ethylene polymerization by combinations of transition metal and organometallic compound has been discovered since 1950s. In general, heterogeneous ZN catalyst is based on titanium chloride supported on magnesium dichloride (TiCl4/MgCl2). MgCl2 is suitable s ...
Flux (metallurgy)
In metallurgy, a flux (derived from Latin fluxus meaning “flow”) is a chemical cleaning agent, flowing agent, or purifying agent. Fluxes may have more than one function at a time. They are used in both extractive metallurgy and metal joining.Some of the earliest known fluxes were carbonate of soda, potash, charcoal, coke, borax, lime, lead sulfide and certain minerals containing phosphorus. Iron ore was also used as a flux in the smelting of copper. These agents served various functions, the simplest being a reducing agent which prevented oxides from forming on the surface of the molten metal, while others absorbed impurities into the slag which could be scraped off the molten metal.As cleaning agents, fluxes facilitate soldering, brazing, and welding by removing oxidation from the metals to be joined. Common fluxes are: ammonium chloride or rosin for soldering tin; hydrochloric acid and zinc chloride for soldering galvanized iron (and other zinc surfaces); and borax for brazing or braze-welding ferrous metals. In the process of smelting, inorganic chlorides, fluorides (see fluorite), limestone and other materials are designated as ""fluxes"" when added to the contents of a smelting furnace or a cupola for the purpose of purging the metal of chemical impurities such as phosphorus, and of rendering slag more liquid at the smelting temperature. The slag is a liquid mixture of ash, flux, and other impurities. This reduction of slag viscosity with temperature, increasing the flow of slag in smelting, is the original origin of the word flux in metallurgy. Fluxes are also used in foundries for removing impurities from molten nonferrous metals such as aluminum, or for adding desirable trace elements such as titanium.In high-temperature metal joining processes (welding, brazing and soldering), the primary purpose of flux is to prevent oxidation of the base and filler materials. Tin-lead solder (e.g.) attaches very well to copper, but poorly to the various oxides of copper, which form quickly at soldering temperatures. Flux is a substance which is nearly inert at room temperature, but which becomes strongly reducing at elevated temperatures, preventing the formation of metal oxides. Additionally, flux allows solder to flow easily on the working piece rather than forming beads as it would otherwise.The role of a flux in joining processes is typically dual: dissolving of the oxides on the metal surface, which facilitates wetting by molten metal, and acting as an oxygen barrier by coating the hot surface, preventing its oxidation. In some applications molten flux also serves as a heat transfer medium, facilitating heating of the joint by the soldering tool or molten solder.Fluxes for soft soldering are typically of organic nature, though inorganic fluxes, usually based on halogenides and/or acids, are also used in non-electronics applications. Fluxes for brazing operate at significantly higher temperatures and are therefore mostly inorganic; the organic compounds tend to be of supplementary nature.