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Aerotolerant anaerobes are incapable of aerobic respiration, but can nevertheless grow in the presence of air. Many lactic acid bacteria fall into this category. They can only generate energy by fermentation and lack both catalase and superoxide dismutase, but are able to grow in the presence of oxygen because they have a mechanism for destroying superoxide. Microorganisms affect the Eh of their environment during growth. This is true especially of aerobes, which can lower the Eh of their environment while anaerobes cannot. As aerobes grow, oxygen in the medium is depleted, resulting in the lowering of Eh. Growth is not slowed, however, due to the ability of cells to make use of oxygen donating or hydrogen-accepting substances in the medium. The result of this is that the medium becomes poorer in oxidizing and richer in reducing substances. Microorganisms canreduce the Eh of a medium by their production of certain metabolic by-products such as hydrogen sulphide, which has the capacity to lower Eh to -300 mv.
POSSIBLE ERRORS IN DRUG ADMINISTRATION There can be various reasons for error in administering drugs: i) Poor communication of intention by the prescriber. ii) Failur
Explain the Techniques of Operation used in post myocardial infarction ventricular septal defect? Normal 0 false false false EN-IN X-NONE X-NONE
SERENDIPIDIT Y - Sometimes discoveries are made unexpectedly matter of chance. This is serendipidity. Examples - 1. Structural formula of benzene - It was dreamt by
Q. What is Revisions? Revision accounts for only a section of a genus or for the elements as restricted to a continent or smaller geographical area. Some revisions are based so
similarities of male and female
What is Biochemical Composition As life evolved on this planet, nature selected only a few elements, and life eventually came to be based essentially on carbon compounds. Out o
RESPIR A TIO N IN FISHES - Respiratory organs are gills. In elasmobranchi 5-7 pairs of gills present, spiracles present. In Teleostomai 4 pairs gills present, covered
Q What are the two big groups into which cells are classified? Cells can be classified as prokaryotic or eukaryotic. Prokaryotic cell is that with no delimited nucleus. Eukaryo
special character of leucosolenia
list of the structures you would expect to find in the dermis.
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