acetoin การใช้

• Alpha-naphthol and potassium hydroxide are chemicals that detect acetoin.
• The Voges-Proskauer test is a commonly used microbiological test for acetoin production.
• Acetoin is used as a food flavoring ( in baked goods ) and as a fragrance.
• The systematic name of this enzyme class is "'acetoin racemase " '.
• The yeasts also help keep levels low by consuming diacetyl and reducing it to acetoin and butylene glycol.
• That notice also solicited input regarding exposure and health effects of acetoin, acetaldehyde, acetic acid and furfural.
• The yeast then absorbs the diacetyl, and reduces the ketone groups to form acetoin and 2, 3-butanediol.
• Together with the acetylpolyamine amidohydrolases and the acetoin utilization proteins, the histone deacetylases form an ancient protein superfamily known as the histone deacetylase superfamily.
• The VP test uses alpha-naphthol and potassium hydroxide to test for the presence of acetylmethylcarbinol ( acetoin ), an intermediate of the 2, 3-butanediol fermentation pathway.
• The Voges Proskauer test uses 1-naphthol in potassium hydroxide ( KOH ) solution to detect the breakdown of glucose into acetoin which is used by bacteria for external energy storage.
• "S . ferus " are gram positive lanceolate coccobacillus They are non-sporulating and catalase-negative The majority of specimens test positive for the production of acetoin ( Vogues-Proskauer reaction ).
• It is negative for clumping factor, coagulase, hyaluronidase, arginine dihydrolase, ornithine decarboxylase, acetoin, arginine arylamidase, alpha-and beta-haemolysins, heat-stable and heat-labile nucleases, indole, hydrogen sulphide, and lecithinase.
• Lipoic acid serves as co-factor to the acetoin dehydrogenase complex catalyzing the conversion of acetoin ( 3-hydroxy-2-butanone ) to acetaldehyde and acetyl coenzyme A, in some bacteria, allowing acetoin to be used as the sole carbon source.
• Lipoic acid serves as co-factor to the acetoin dehydrogenase complex catalyzing the conversion of acetoin ( 3-hydroxy-2-butanone ) to acetaldehyde and acetyl coenzyme A, in some bacteria, allowing acetoin to be used as the sole carbon source.
• Lipoic acid serves as co-factor to the acetoin dehydrogenase complex catalyzing the conversion of acetoin ( 3-hydroxy-2-butanone ) to acetaldehyde and acetyl coenzyme A, in some bacteria, allowing acetoin to be used as the sole carbon source.
• "' ?-Acetolactic acid "'( "'?-acetolactate "') is a precursor in the biosynthesis of the branched chain amino acids valine and leucine . ?-Acetolactic acid is produced from two molecules of pyruvic acid by acetolactate synthase . ?-Acetolactic acid can also be decarboxylated by alpha-acetolactate decarboxylase to produce acetoin.
• Acetoin, clumping factor and coagulase are not produced and activities of urease, haemolysis, arginine dihydrolase, arginine arylamidase, ornithine decarboxylase, beta-galactosidase, beta-glucuronidase, pyrrolidonyl arylamidase, esterase ( C4 ), lipase ( C14 ), Naphthol-AS-BI-phosphohydrolase, valine arylamidase, cystine arylamidase, alpha-galactosidase, N-acetyl-beta-glucosaminidase, alpha-mannosidase, alpha-fucosidase and esterase-lipase ( C8 ) are negative.