Advances in Applied Microbiology, Vol. 31 by Allen I. Laskin (Eds.) PDF

By Allen I. Laskin (Eds.)

ISBN-10: 0120026317

ISBN-13: 9780120026319

Meant for researchers in utilized microbiology and environmental engineers, this e-book covers such themes as environmental evaluate of biotechnological methods and microbial ameliorations of haloaromatic and haloaliphatic compounds.

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Extra resources for Advances in Applied Microbiology, Vol. 31

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The reason for the increased rate of cellulose utilization by the cocultures versus the monoculture of the cellulose fermentor strains, appears to be the inhibition of the activity of cellulase complex of clostridium by cellobiose (Peck and Odom, 1981). This inhibition is released by the presence of an efficient cellobiose-utilizing ancillary bacterium, and then cellulose is more rapidly degraded. Clearly, it should be possible to design cellulose fermentations tailored to yield any desired single product under desired conditions as long as the chosen ancillary bacteria can efficiently use cellobiose.

Also a new mesophilic cellulolytic organism, C . , 1984). This strain together with C. lochheadi, isolated from rumen (Hungate, 1957), are the only cellulolytic clostridia known that produce butyrate as a major fermentation product. C. kluyveri is the only example listed (Table I) among the clostridia that produce the higher chain length organic acids. , 1968). This indicated that C. , 1977). Although not investigated, it well may be that a phosphotransbutyrylase and/or transcaproylase and a butyrate and/or caproate kinase play a role in additional ATP production in this fermentation.

1 X lo6. This fascinating complex appears in electron microscopy to be 18 nm in size and is not broken apart by urea treatment. , 1984). Using a gel overlay assay with CMC, eight of these polypeptides were 36 PALMER HOGEHS found to have cellulolytic activity. Interestingly, only the M , 210,000 subunit was found antigenically active to immune serum prepared from whole cells of C . , 1983). I t appears that the CBF is not only responsible for cell adherence to cellulose but also contains a major portion of this cellulolytic enzyme consortium.

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Advances in Applied Microbiology, Vol. 31 by Allen I. Laskin (Eds.)


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