Results 171 to 180 of about 25,069 (209)

Fermentative Formation of Diacetyl

Nature, 1946
ACCORDING to Martius recent hypothesis1, dehydrogenation would always constitute the primary phase of pyruvic acid breakdown in the animal organism. Dehydrogenation is followed by decarboxylation, with the formation of the ketene-like radical which may act as hydrogen acceptor, being reduced to acetaldehyde.
H, SUOMALAINEN, L, JANNES
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Diacetyl-Induced Lung Disease

Toxicological Reviews, 2006
Diacetyl is a diketone flavouring agent that is commonly employed for buttery taste as well as other purposes. Industrial exposure to flavouring agents, particularly diacetyl, has recently been associated with bronchiolitis obliterans, a severe respiratory illness producing fibrosis and obstruction of the small airways.
Philip, Harber, Kaochoy, Saechao, Catherine, Boomus   +2 more
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2.3‐Diacetyl‐naphthalin

Chemische Berichte, 1963
AbstractAus Naphthalin‐dialdehyd‐(2.3) entsteht mit Methylmagnesiumbromid 2.3‐Bis‐[α‐hydroxy‐äthyl]‐naphthalin, das durch Oxydation mit KMnO4 in 2.3‐Deacetylnaphthalin übergeführt wird. Die Konstitution wird durch typischen Farbreaktionen mit die für aromatische o‐Dicarbonylverbindungen typischen Farbreaktionen mit Aminosäuren und primären Aminen ...
Walter Ried, Manfred Schön
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Bestimmung des Diacetyls

Zeitschrift für Untersuchung der Lebensmittel, 1935
Es wird eine Arbeitsvorschrift zur Bestimmung des Diacetyls als Nickeldioximin gegeben mit einem mittleren Fehler von −0,2%. Zu beachten sind hierbei Dauer und Grad des Erwarmens, Verdunnungsgrad, Basen-Gehalt und die Fluchtigkeit des Diacetyls. Dagegen durfen die Gehalte an Hydroxylaminhydrochlorid und Nickelchlorid innerhalb weiter Grenzen schwanken.
Hans Schmalfuß, Hildegard Rethorn
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Diacetyl Studies. II. Formation and Prevention of Diacetyl in Beer

Proceedings. Annual meeting - American Society of Brewing Chemists, 1957
(1957). Diacetyl Studies. II. Formation and Prevention of Diacetyl in Beer. Proceedings. Annual meeting - American Society of Brewing Chemists: Vol. 15, Proceedings of the Annual Meeting 1957, pp. 110-115.
Martin Burger, Paul R. Glenister, Kurt Becker   +2 more
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Hydrolysis Kinetics of Diacetyl Nadolol

Journal of Pharmaceutical Sciences, 1987
Diacetyl nadolol, a prodrug of nadolol and a beta-blocker, has corneal permeability approximately 20 times higher than that of its parent compound due to its higher lipophilicity. Hydrolysis studies were conducted for diacetyl nadolol at various elevated temperatures and pH values to provide stability information for its ophthalmic preparations.
C H, Chiang, C Y, Wu, H S, Huang
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Removal of diacetyl from beer by adsorbants and diacetyl reductase

Biotechnology and Bioengineering, 1979
AbstractRemoval of diacetyl from beer with adsorbants like cellulose, silica gel, activated charcoal, calcium phosphate gel, anion‐ and cation‐exchange resins, and silicylic acid black soil bed (SABSB) was attempted in comparison with the enzyme diacetyl reductase (EC 1.1.1.5).
K. G. Gupta, A. K. Jain, Surinder Dhawan
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A study of the reaction of urea with diacetyl monoxime and diacetyl

Clinical Biochemistry, 1972
Summary 1. Four compounds were synthesized under different conditions using either diacetyl or its monoxime as a reagent in reactions with urea. From the absorption spectra and the log10 A vs. wavelength curves, the four compounds were shown to be the same substance as confirmed by the similarity in their infrared spectra. The compounds obey Beer'
R, Lugosi, R J, Thibert, W J, Holland, L K, Lam   +3 more
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