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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 151 (1943), S. 23-23 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] BACH and Williamson1 claim to have shown that rat liver forms urea from ammonium lactate even when the activity of arginase is inhibited by high concentrations of ornithine2. They conclude that liver can synthesize urea without the participation of arginase. ...
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  • 2
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AS Hill1 has pointed out, it still remains to be proved that adenosine triphosphate is the immediate source of energy in the contracting muscle. The analytical methods now available for determining the individual phosphate fractions of animal tissues have made it possible to re-examine directly the ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 138 (1936), S. 288-289 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE have found some new chemical reactions in living cells which represent steps in the breakdown of carbohydrates. Pyruvic acid, if added to animal tissues, disappears rapidly not only in the presence, but also in the absence of oxygen. In the presence of oxygen the end-products of the pyruvic ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 147 (1941), S. 560-563 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] BEFORE 1936, only autotrophio organisms- -^ plants and a small group of bacteria-were known to assimilate carbon dioxide. Recent experiments have shown that carbon dioxide is also assimilated by many heterotrophic cells, including animal tissues. Although this reaction provides no more than a small ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 154 (1944), S. 209-210 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] BREUSCH1 assumes that acetoacetic and oxaloacetic acids form citric acid in animal tissues according to, the reaction: ... Wieland and Rosenthal2, apparently independently, arrive at a similar view. They suggest that the following reaction occurs in kidney and ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 988-991 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MAJOR advances have recently been made towards the closure of one of the outstanding gaps in the knowledge of intermediary metabolism. This gap concerns the metabolic processes by which two-carbon compounds, such as acetate or ethanol, can be converted to cell constituents in those organisms which ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 159 (1947), S. 808-809 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN earlier experiments1 it was noted that isolated rat liver can remove much more ammonia from the nutrient medium than can be accounted for by the formation of urea. We have investigated the reactions, other thanurea synthesis, which cause a disappearance of ammonia in liver ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 144 (1939), S. 513-514 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has previously been shown that α-ketonie acids liberate carbon dioxide when added to animal tissues under anaerobic conditions1. The evolution of carbon dioxido was found to be due to a ‘dismutation’. (1) 2 R.CO.COOII + 11,0 = R.C1I(OH).COOH + KXOOH-KO.. We have now ...
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 47 (1996), S. 27-33 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Material experiences with ventilator blades and pump rotors in flue gas desulfurization plantsDue to the specific conditions in flue gas desulfurization plants (FGD) special high alloyed materials are used especially for ventilators and suspension pumps. First the application of available materials, like the nickel base cast alloy G-NiCr21Mo16 for FGD ventilator blades and duplex-casts of the type G-X3CrNiMoCu 24 6 for pump rotors lead to insufficient results. The materials had to be improved because their properties could jeopardize a continuous operation of the FGD, or the life time was too short due to increased wear.Concerning the ventilator blades the properties were improved, partly in cooperation with the manufacturers. A VGB-recommendation with the name „Requirements for cast FGD ventilator blades of material G-NiCr21Mo16“ was written. In the other case pump damages which occurred at the Hüls AG were presented. The aim is a prolongation of the life time either by changes in the manufacturing process of the pump or by the use of other materials.
    Notes: Aufgrund der spezifischen Beanspruchungen in Rauchgasentschwefelungsanlagen (REAs) werden insbesondere für Saugzuggebläse und Suspensionspumpen hochwertige metallische Sonderwerkstoffe verwendet. Zunächst führte der Einsatz verfügbarer Werkstoffe, wie die Guß-Nickelbasislegierung G-NiCr21Mo16 für REA-Gebläseschaufeln und Duplex-Stahlgußsorten vom Typ G-X3CrNiMoCu 24 6 für Laufräder von Suspensionspumpen zu unbefriedigenden Ergebnissen. Diese Werkstoffe erwiesen sich frühzeitig als optimierungsbedürftig, da z.B. herstellungsbedingte Eigenschaftsdefizite den störungsfreien Betrieb gefährdeten, oder die Standzeit entsprach aufgrund erhöhten Verschleißes nicht den Erwartungen.Im Falle der Gebläseschaufeln wurden - teilweise im Dialog und in Zusammenarbeit mit den Herstellern - die Eigenschaftsdefizite weitgehend beseitigt; die „Anforderungen an gegossene REA-Gebläseschaufeln aus dem Werkstoff G-NiCr21Mo16“ wurden in einer gleichnamigen VGB-Empfehlung neu formuliert. Im Falle der Pumpenlaufräder wird anhand des Beispiels bei der Hüls AG geschädigter Pumpen aufgezeigt, wie derzeit versucht wird, durch werkstoffkundliche Maßnahmen am Werkstoff G-X3CrNiMo Cu 24 6 oder durch Einsatz anderer Gußwerkstoffe längere Standzeiten zu erreichen.
    Additional Material: 15 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 155 (1940), S. 77-114 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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