Biological methanogenesis is linked to permanent water logged systems, e.g., rice field soils or lake sediments. In these systems the methanogenic community as well as the pathway of methane formation are well-described. By contrast, the methanogenic potential of river sediments is so far not well-investigated. Therefore, we analyzed (a) the methanogenic potential (incubation experiments), (b) ...

the superscripts denoting separate isotopic labels. Since Pine and Barker (1956) established that the methyl group of acetate is transferred intact during its incorporation into methane, we wished to determine whether methanol could be metabolized analogously. The deuterium incorporation procedure previously employed for the study of the acetate fermentation was used to establish that all three...

The gastrointestinal tracts of breast-fed infants are colonized more easily with bifidobacteria than are those of formula-fed infants. Colonization is thought to reduce infant diarrhea. Amendments to formulas that improve colonization by bifidobacteria are being actively investigated. Colonization studies almost invariably require measurements of the concentration of the bifidobacteria in feces...

Three independent 28 or 32-day stationary cultures of Desulfotomaculum acetoxidans DSM 771 strain were carried out under anoxic conditions in acetate or lactate-containing media. The acids were the sole carbon and energy sources in these media. During cultivation the turbidity (for calculation of cell division index) and hydrogen sulfide contents were determined in culture broth and reduced glu...

The gastrointestinal tracts of breast-fed infants are colonized more easily with bifidobacteria than are those of formula-fed infants. Colonization is thought to reduce infant diarrhea. Amendments to formulas that improve colonization by bifidobacteria are being actively investigated. Colonization studies almost invariably require measurements of the concentration of the bifidobacteria in feces...

BACKGROUND Acetic acid, an inhibitor of sugar fermentation by yeast, is invariably present in lignocellulosic hydrolysates which are used or considered as feedstocks for yeast-based bioethanol production. Saccharomyces cerevisiae strains have been constructed, in which anaerobic reduction of acetic acid to ethanol replaces glycerol formation as a mechanism for reoxidizing NADH formed in biosynt...

tica grown with bacteria produce H, and acetate while cells grown axenically produce neither. Aerobically, acetate is produced and 0, is consumed by amehae from either type of cells. Centrifuged extracts, 2.4 x 10” x g x min, from both types of cells contain pyruvate synthase (EC 1.2.7.1) and an acetate thiokinase which, together, form a system capable of converting pyruvate to acetate. Pyruvat...

effects of 28 days lead acetate (ioc, 500, 1000 ppm) treatment on hypertension ami relationship between blood lead levels and hypertension in male. spraguc-dawley rats were studied. results of this study showed tlxat lead acetate treatment did run decrease, body wcight or water consumption, except for lead acetate (1000 ppm) and sodium acetate (500 ppm) which increased fluid consumption when co...