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At least 217 records · Page 12Linked to original sources
PubMed2006

Decolourisation and detoxification of synthetic molasses melanoidins by individual and mixed cultures of Bacillus spp.

The decolourisation of synthetic melanoidins (i.e., GGA, GAA, SGA, and SAA) by three Bacillus isolates (Bacillus thuringiensis (MTCC 4714), Bacillus brevis (MTCC 4716) and Bacillus sp. (MTCC 6506)) was studied. Significant reduction in the values of physicochemical parameters was noticed alongwith the decolourisation of all four melanoidins (10% v/v). B. thuringiensis (MTCC 4714) caused maximum decolourisation followed by B. brevis (MTCC 4716) and Bacillus sp. (MTCC 6506). A mixed culture comprised of these three strains was capable of decolourising all four melanoidins. The medium that contained glucose as a sole carbon source showed 15% more decolourisation than that containing both carbon and nitrogen sources. Melanoidin SGA was maximally decolourised (50%) while melanoidin GAA was decolourised least ( approximately 06%) in the presence of glucose as a sole energy source. The addition of 1% glucose as a supplementary carbon source was essential for co-metabolism of melanoidin complex. The decolourisation of synthetic melanoidin by three Bacillus spp. significantly reduced the toxicity to the tubificid worm (Tubifex tubifex, Müller).

Analysis of Variance↗
PubMed1979

Secondary fermentation in the runen of a sheep given a diet based on molasses.

1. The extent of conversion of acetate-carbon to carbon dioxide in the rumen of a 40 kg wether consuming 1 kg molasses/d was estimated using isotope-tracer-dilution techniques. 2. There was a high rate of conversion of acetate to CO2 (6.0 g C/d) in the rumen. There were high concentrations in the rumen of Methanosarcina approximately 6 x 10(9)/ml which represents a significant proportion of the rumen bacterial biomass. These organisms are usually found in mud and sludge and are capable of oxidizing acetate. 3. The most likely explanation of these results was that there was an extensive secondary or sludge-type fermentation occurring in the rumen which results in volatile fatty acids being converted to CO2 and methane. In similar studies with sheep given lucerne (Medicago sativa) diets, conversion of acetate-C to CO2 within the rumen was not evident. 4. It is suggested that a major effect of the presence of secondary fermentation processes in the rumen may be to reduce availability of energy nutrients to the animal, and to alter the ratio protein:energy in the absorbed nutrients.

Acetates↗