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The formation of diacetyl and acetoin from α-acetolactic acid

✍ Scribed by J. C. de Man

Book ID
104586061
Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
286 KB
Volume
78
Category
Article
ISSN
0165-0513

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✦ Synopsis

Abstract

Of several ions tested, only Fe^+3^, Cu^+2^ and Al^+3^ catalysed the decarboxylation of α‐acetolactic acid at pH 4.8.

At pH 2.2, only Fe^+3^ and Cu^+2^ were active.

Fe^+3^ and Cu^+2^ were shown to form complexes with α‐acetolactic acid.

Fe^+3^ and Cu^+2^ not only decarboxylated but also oxidized α‐acetolactic acid, with, as a result, formation of diacetyl.

Decarboxylation of α‐acetolactic acid by these ions is compatible with the mechanism suggested by Martell and Calvin.

α‐Acetolactic acid is subject to autoxidation. 2‐Butene‐2,3‐diol may be an intermediate product.

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Factors influencing the production of ac
Factors influencing the production of acetoin and diacetyl by lactic acid bacteria in skim milk
✍ Abo-Elnaga, I. G. ;Hegazi, F. Z. 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 316 KB 👁 1 views

## Abstract Nine strains of starter cultures belonging to the genera __Streptococcus, Leuconostoc and Lactobacillus__ were studied for the effect of pyruvate concentration, incubation period and the associative growth on the production of acetoin and diacetyl in skim milk. The absolute amount of ac