The effect of the addition of 2, 3, 5, 7 and 10% respectively of propionic acid on known numbers of bacteria added to or contained in carcass meal was examined. Escherichia coli was totally inhibited by 2% propionic acid, while 5% of the acid both inhibited Salmonella typhimurium and brought about a 74,7% reduction in the total aerobic bacterial count.

For the binary liquid systems formic acid + acetic acid, formic acid + propionic acid, and acetic acid + propionic acid, we give the results of new calorimetric measurements of the molar excess enthalpy H at 25 °C, 30 °C, 40 °C, and 60°C, covering the entire range of compositions. H is always positive, increases linearly with the temperature, and is slightly asymmetric with respect to the mole ...

Anaerobic digestion is the breakdown of biodegradable organic material by microorganisms in the absence of oxygen or in an oxygen-starved environment.This technology is superior to the landfilling and also the aerobic composting. The aim of the present study was to examine whether the effluent Volatile Fatty Acids from the anaerobic acidogenesis of the food waste can be used du to its high valu...

1. 2-Methyl[1-(14)C]octanoic acid was synthesized from 2-bromo-octane and (14)CO(2). 2. 2-Methyl[1-(14)C]octanoic acid was readily oxidized to propionic acid and carbon dioxide by mitochondrial preparations from liver, less readily oxidized by adrenal and kidney (mitochondria), and only poorly oxidized by heart, spleen and brown fat (mitochondria). 3. 3beta-Hydroxy[26-(14)C]cholest-5-en-26-oic ...

Two alkaloids, canthin-6-one 9-O-beta-glucopyranoside and 7-hydroxy-beta-carboline 1-propionic acid, were isolated from the roots of Eurcoma harmandiana together with the five known canthin-6-one alkaloids, 9-hydroxycanthin-6-one, 9-methoxycanthin-6-one, 9,10-dimethoxycanthin-6-one, canthin-6-one and canthin-6-one N-oxide, and the two known beta-carboline alkaloids, beta-carboline 1-propionic a...

The fundamental investigations of Virtanen (1923, 1925), Virtanen and Karstrom (1931), and van Niel (1928) on the mechanism of glucose dissimilation by the propionic acid bacteria have led to the proposal that glucose after preliminary phosphorylation is converted into 2 molecules of the C) type. Virtanen upon theoretical considerations concludes that lactic acid is an intermediate product of t...