Results 261 to 270 of about 540,832 (313)

Metal Catalysis of Indole Production

Nature, 1949
THE production of indole from tryptophan by the action of copper sulphate and 9 per cent (w/v) sodium hydroxide was reported by Herzfeld1 and confirmed by Baker, Dawes and Happold2 in an attempt to elucidate the mechanism of the tryptophanase enzyme system of Esch. coli3. Catalysis of indole production was shown to occur with copper and cobalt, but not
E A, DAWES, F C, HAPPOLD
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Production of Metal Nanopowders by Sonoelectrochemistry

MRS Proceedings, 1994
AbstractMetal powders with a diameter ranging from 20 to 50 micrometers are currently produced by electrolysis at high current density in aqueous electrolytes. A lot of research is then devoted to produce by electrolysis and with a high yield, ultrafine metal powders.
Delplancke, Jean-Luc, Di Bella, V., Reisse, Jacques, Winand, René   +3 more
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Hacinebi Metal Production and Exchange

Paléorient, 1999
Excavations from the pre-Uruk levels at Hacinebi yielded a complete repertoire of archaeometallurgical finds including ores, slags, crucible fragments with accretions, molds, a tuyere, metal artifacts, as well as a multi-furnace metal workshop. The highly advanced metal technology at Hacinebi is in accordance with other Late Chalcolithic local ...
Özbal, Hadi, Adriaens, Annemie Mieke, Earl, Bryan   +2 more
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Optimization of Sheet Metal Products

2006
Linear flow splitting enables the forming of branched sheet metal products in integral style. To optimize those products design parameters have to be based on market requirements. We show that methods that are also used in Operations Research can, in principle, be applied to solve these optimization problems.
Herbert Birkhofer, Armin Fügenschuh, Ute Günther, Daniel Junglas, Alexander Martin 0001, Thorsten Sauer, Stefan Ulbrich, Martin Wäldele, Stephan Walter   +8 more
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The Production of Metal Screens

Journal of the Society of Dyers and Colourists, 1953
A new method of producing printing screens from metal is described. Although the method requires a higher degree of technical skill and additional capital outlay compared with normal methods, improved results are obtainable in the life and accuracy of registration of screens, and in addition it is possible to gain greater control over the quality of ...
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The Production of Metallic Zinc

Nature, 1921
IN the issue of NATURE for April 28 I observe under “Notes” (p. 279) a reference to the small volume on zinc recently issued by the Imperial Mineral Resources Bureau. In this reference it is pointed out that the figures relative to the production of metallic zinc in the United Kingdom for 1913 do not harmonise with the figures of production and imports
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Metal forming production

2008
Metal forming development should in direction of achivement commertial goals for technical products. Observation goal is to develop technology which would provide high quality product. It sholuld take account that today development processes are not final. The future is additionally in hydro forming and laser forming.
Cumin, Josip, Seuček, Ivan, Šoškić, Nikola, Grizelj, Branko   +3 more
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The production of metallic films

Journal of Scientific Instruments, 1936
Some electrical properties of thin metallic foil made by various methods are summarised, and the merits of each process considered. The general superiority of the foil produced by rolling is emphasised. Strip of 0.1 micron thickness has been made by rolling out 35 microns diameter wire. A few notes on the manipulation of thin foil conclude the paper.
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Recent advances in application of transition metal phosphides for photocatalytic hydrogen production

Chemical Engineering Journal, 2021
Chengyun Zhou, Weiping Xiong, Guangming Zeng   +2 more
exaly  

Metals, Elemental Products

1999
Small metal particles are produced by mechanical comminution, chemical reaction, electrolytic deposition, and liquid-metal atomization: A powder is a finely divided solid smaller than about 1mm in maximum dimension. Powders can be compressed into pellets.
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