Results 181 to 190 of about 16,465 (207)

ChemInform Abstract: PHOTODECOMPOSITION OF ACETOINS

Chemischer Informationsdienst, 1975
AbstractDie Photolyse der Acetoine (I) zu den Ketonen (II) und Acetaldehyd (III) wird untersucht.
HONG‐SON RYANG, HIROSHI SAKURAI
openaire   +1 more source

ChemInform Abstract: ACETOIN ENEDIOL CYCLOPHOSPHOROCHLORIDATE

Chemischer Informationsdienst, 1976
AbstractDas Pyrophosphat (I) wird durch Imidazol (II) gespalten und danach mit Chlorwasserstoff zum cyclischen Phosphorsäureestermonochlorid (IV) umgesetzt, das als starkes Phosphorylierungsreagens für Alkohole (V), Mercaptane (VII) oder Amine (IX) geeignet ist.
F. RAMIREZ, H. OKAZAKI, J. F. MARECEK
openaire   +1 more source

Pyruvic decarboxylase and acetoin formation in Athiorhodaceae

Canadian Journal of Microbiology, 1973
Studies with cell-free extracts of Rhodopseudomonas palustris strain Q showed that under anaerobic conditions pyruvate was decarboxylated with the stoichiometric formation of carbon dioxide. Other products of the reaction include acetaldehyde and acetoin (acetyl methyl carbinol), indicating the presence of pyruvic decarboxylase. A survey of purple non-
S M, Qadri, D S, Hoare
openaire   +2 more sources

Acetoin as a Metabolite of Ethanol

Acta Physiologica Scandinavica, 1963
AbstractBlood acetoin concentrations in rabbits were followed after administration of ethanol to animals receiving disulfiram and to control animals. Disulfiram increased blood acetoin before and after the administration of alcohol. No increase was observed in animals receiving alcohol alone.
openaire   +2 more sources

Mechanism of acetoin synthesis by α-carboxylase

Biochimica et Biophysica Acta, 1952
Abstract 1. 1. Highly purified preparations of α-carboxylase from wheat germ catalyze the synthesis of acetylmethylcarbinol (AMC) from pyruvate and acetaldehyde and from acetaldehyde alone. 2. 2. The AMC thus synthesized has been isolated and its identity established by conversion to diacetyl, periodate degradation, and by analysis of the ...
T P, SINGER, J, PENSKY
openaire   +2 more sources

An acetoin-regulated expression system of Bacillussubtilis

Applied Microbiology and Biotechnology, 2006
An expression system, which is based on the promoter of the acoABCL operon of Bacillus subtilis was developed and characterized. The acoABCL operon codes for the acetoin dehydrogenase complex, which is the major enzyme system responsible for the catabolism of acetoin in B. subtilis. Besides weak organic acids, the neutral overflow metabolite acetoin is
Jörg, Silbersack, Britta, Jürgen, Michael, Hecker, Bernd, Schneidinger, Rainer, Schmuck, Thomas, Schweder   +5 more
openaire   +2 more sources

Properties of diacetyl (acetoin) reductase from Bacillus stearothermophilus

Bioorganic & Medicinal Chemistry, 1996
The cells of Bacillus stearothermophilus contain an NADH-dependent diacetyl (acetoin) reductase. The enzyme was easily purified to homogeneity, partially characterised, and found to be composed of two subunits with the same molecular weight. In the presence of NADH, it catalyses the stereospecific reduction of diacetyl first to (3S)-acetoin and then to
Giovannini P. P., Medici A., Bergamini C. M., Rippa M.   +3 more
openaire   +2 more sources

A Piezoelectric Crystal Detector for Acetoin

Analytical Letters, 1984
Abstract A piezoelectric quartz crystal coated with tetrabutyphosphoniun chloride was found to be a good detector for acetoin. The coating is sensitive in the ppb range and completely reversible. The response curve is linear over a concentration range of 8-120 ppb. The detector can be tuned to give a satisfactory response in 30 seconds.
A. A. Suleiman, E. C. Hahn, G. G. Guilbault, James R. Cavanaugh   +3 more
openaire   +1 more source

[Acetoin metabolism in animal tissues].

Ukrainskii biokhimicheskii zhurnal (1978), 1988
The acetoin-synthesizing activity has been studied in the skeletal muscles, brain, liver and spleen homogenates (numbered as the activity decreases). The acetoin-synthesizing activity drastically increases in case of the acetaldehyde excess and alcohol intoxication.
I B, Zavodnik, V U, Buko, Iu M, Ostrovskiĭ   +2 more
openaire   +1 more source

Acetoin Enediol Cyclophosphorochloridate

Synthesis, 1975
Fausto RAMIREZ, Hiroshi OKAZAKI, James F. MARECEK   +2 more
openaire   +1 more source