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Escherichia coli is generally regarded as part of the normal flora of the human intestinal tract and that of many animals. Serotypes of E. coli which have been implicated in human diarrhoeal diseases or food poisoning outbreaks and have been designated enteropathogenic E. coli (EEC). They grow over a wide range of temperatures, 20-40ºC with a minimum growth temperature at 10ºC and an optimum at 37ºC. Heating at 65ºC for 15-20 minutes is lethal. The pH range for growth is 4.2-8.50, with an optimum in the range of pH 7.2-7.5. E. coli will grow in the presence of 5.0% salt at 37ºC but 10% is inhibitory.
Biological effects: Aflatoxins are acute hepatotoxins and are known to be carcinogenic in some animal species as rat. Aflatoxin B1 is acutely toxic and is responsible for liver nec
Is it possible for a hermaphrodite species to present cross-fecundation? There are hermaphrodite species of animals and plants that present cross-fecundation mainly because of
Given a polymer backbone of H-C-C with the first carbon having 2 H atoms attached and the 2nd carbon with 3 atoms attached, a bond with a water molecule attaches to the left H atom
Hipot is an abbreviation for high potential. Usually, Hipot is a term given to a class of electrical safety testing instruments used to confirm electrical insulation in finished ap
V apour Theory (i) It was proposed by a Greek philosopher Pythagoras in 500 B.C. (ii) Each organ of an animal body emitted some kind of vapour and that a ne
(a) Explain the structure of a human sperm. (b) Give a schematic representation showing the events of Spermatogeninesis in human male.
Mammalian Heart The division of heart and separation of systemic and pulmonary circulation is complete in birds and mammals. The structure of mammalian heart and also how the
M e rc u r y The metal is biologically non-essential but being used in various industries, it is released in environment from both natural and anthropogenic sources. Man-m
Significance of Lingual nerve and artery Because the nerve lies medial to the retromolar pad, incisions in this region should remain lateral to the pad and mucosal reflection s
Define Metabolic Effects of Thyroid Hormones? Although (T 4 ) is quantitatively predominant, (T 3 ) is the more active form. The mechanism of action of thyroid hormones appears
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