منابع مشابه
The Flocculation of Bacteria by Proteins
1. The effect of adding pure proteins to bacterial suspensions at different H ion concentrations has been studied. 2. The zone of flocculation of protein-treated bacteria bears a significant relationship to the isoelectric point of the protein used. With the higher concentration of protein, agglutination occurs at or near the isoelectric point of that protein; at reactions acid to this, the bac...
متن کاملFlocculation of bacteria by hydrophilic colloids.
Bacteria, like many colloids, are generally considered to be negatively charged at a neutral pH. In many cases, bacteria behave as typical hydrophilic colloids and are not precipitated nor flocculated by merely reducing the surface charges to zero (Lamanna and Mallette, 1953). When this is the situation, it is necessary to add dehydrating agents or specific antibodies to obtain flocculation. Ob...
متن کاملPotential role of bacteria packaging by protozoa in the persistence and transmission of pathogenic bacteria
Many pathogenic bacteria live in close association with protozoa. These unicellular eukaryotic microorganisms are ubiquitous in various environments. A number of protozoa such as amoebae and ciliates ingest pathogenic bacteria, package them usually in membrane structures, and then release them into the environment. Packaged bacteria are more resistant to various stresses and are more apt to sur...
متن کاملReduction of Acid-Fast and Non-Acid-Fast Bacteria by Point of Use Coagulation-Flocculation-Disinfection
Point of use (POU) household water treatment is increasingly being adopted as a solution for access to safe water. Non-tuberculous Mycobacteria (NTM) are found in water, but there is little research on whether NTM survive POU treatment. Mycobacteria may be removed by multi-barrier treatment systems that combine processes such as coagulation, settling and disinfection. This work evaluated remova...
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Phagocytic cells represent an important line of innate defense against microorganisms. Uptake of microorganisms by these cells involves the formation of a phagosome that matures by fusing with endocytic compartments, resulting in killing of the enclosed microbe. Small GTPases of the Rab family are key regulators of vesicular trafficking in the endocytic pathway. Intracellular pathogens can inte...
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ژورنال
عنوان ژورنال: Nature
سال: 1943
ISSN: 0028-0836,1476-4687
DOI: 10.1038/151642a0