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Read e-book online Advances in Microbial Physiology, Vol. 55 PDF

By Robert K. Poole

ISBN-10: 0123747902

ISBN-13: 9780123747907

Advances in Microbial body structure is without doubt one of the so much winning and prestigious sequence from educational Press, an imprint of Elsevier. It publishes topical and significant studies, studying body structure to incorporate all fabric that contributes to our figuring out of the way microorganisms and their part elements paintings. First released in 1967, it really is now in its fifty fifth quantity. The Editors have consistently striven to interpret microbial body structure within the broadest context and feature by no means limited the contents to "traditional" perspectives of complete mobilephone body structure. Now edited through Professor Robert Poole, collage of Sheffield, Advances in Microbial body structure remains to be an influential and extremely good reviewed sequence. * 2007 impression issue of 4.9, putting it thirteenth within the hugely aggressive classification of microbiology * Contributions by way of prime foreign scientists * the newest study in microbial body structure

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Extra info for Advances in Microbial Physiology, Vol. 55

Example text

At the alkaline side, B. 0 resulting, respectively, in a growth arrest of about an hour and 5 hours followed by restoration of growth. , 2001). 6. , 1984; Russell and Diez-Gonzalez, 1998). Their net uptake is driven by DpH; thus, at low external pH, a high concentration of protons is released upon deprotonation of the weak acid that is internalized. This can exhaust the cell’s buffering and proton export capacity that leads to depression of the internal pH. Low molecular weight organic acids with a pKa in the range of pH 3–5 are toxic to neutralophiles, and even more so to acidophiles.

PH CORRECTION MECHANISMS If an excess of protons and hydroxide ions bypass the cell’s pH homeostatic mechanisms and enter the cytoplasm, then the cell requires means by which to ameliorate the potential damage to the cell, and provide tolerance to cytoplasmic pH above or below its optimum. Some of these mechanisms are common between the neutralophiles, acidophiles, and alkaliphiles, such as cytoplasmic buffering that acts either to decrease or increase the cytoplasmic pH to regain optimum pH. Other mechanisms are found in particular species, such as catabolism that eliminates the uncoupling action of organic acids (discussed below).

1996) and Yersinia entericolitica (de KoningWard and Robins-Browne, 1995). , 2008). 1.

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Advances in Microbial Physiology, Vol. 55 by Robert K. Poole

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