RALES
发表于 2025-3-25 05:43:03
,Determination of Tungsten in Binary Tungsten—Molybdenum Alloys,The determination of tungsten in molybdenum is a complex analytical problem. In order to separate the metals the molybdenum is precipitated by hydrogen sulfide in the presence of tartaric acid. The tungsten is determined in the filtrate . If there is only a little tungsten present the error is considerable.
neoplasm
发表于 2025-3-25 10:29:17
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轻率的你
发表于 2025-3-25 15:41:05
Defining the implementation measurescal reagents. The so-called amorphous carbon (soot, highly active coals) is easily oxidized by a 30% solution of hydrogen peroxide and adsorbs several dyes (bromothymol blue, etc.) , whereas according to our present data graphite remains unaffected by these reagents. In order to conduct a sy
Diluge
发表于 2025-3-25 18:05:28
Process-based Strategic Planningetallic” class of materials, although very few data relating to the exact properties of the hydrides are available. The study of these compounds has been retarded by their thermal instability, their peculiar absorption of hydrogen, and the absence of methods of obtaining the hydrides in a compact st
FRONT
发表于 2025-3-25 22:56:46
Process-based Strategic Planning matter of great concern in the Soviet Union and elsewhere over the last few years ; however, very little has appeared in the literature regarding the chemical analysis of these substances .
ascend
发表于 2025-3-26 00:11:13
Defining the strategic businessesth various precipitating agents, for example, the formation of a salt of pyrocatechin-germanic acid with o-phenanthroline , hydroxyquinoline , and others. The volumetric method is based on the capacity of germanic acid to form a complex acid with polyatomic alcohols or monosaccharides, this be
Tracheotomy
发表于 2025-3-26 06:09:03
Strategic analysis and planning toolbox connection is presented by the oxides of the rare-earth elements, yttrium, and scandium, and also the compounds and solid solutions which these form with the refractory oxides of group II elements, since these compounds have extremely high melting points (about 2000°C) and other valuable properties
Exonerate
发表于 2025-3-26 11:57:27
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ADORE
发表于 2025-3-26 16:08:15
Corporate strategy development process the superposition of a current differs from the interaction of the carbides and nitrides of Group VI–VIII metals. This fact enables us to isolate individual carbides MeC or nitrides MeN from mixtures of carbides or nitrides, or from steels and alloys containing these phases. It is a more complicate
配偶
发表于 2025-3-26 18:01:38
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