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Q. Illustrate the tyndallisation?
John Tyndall devised a process of sterilisation by steaming for a few minutes at 100o C on 3-4 successive operations separated by 24 hour intervals at room temperatures. The principle is that the first exposure kills all vegetative bacteria; spores will germinate and be killed on subsequent occasions.
Define working of Kidney in excretion of zinc in humans? Very small amount of zinc is excreted in the urine (0.3-0.7 mg/day), as most of the zinc filtered by the kidney is reab
CONCEPT AND MEANING OF EVALUATION: Evaluation of programmes is critical for measuring various community health services The ultimate reasons for doing evaluation is to ensure
An enzyme isolated from a mutant bacterium grown at 20 degrees celsius works in a test tube at 20 degrees celsius but not at 37 degrees celsius( 37 degrees celsius is the temperatu
How sugar is used in Meringues? Egg whites beaten for a meringue hold air bubbles as the mechanical action of the beaters partly coagulates the egg protein. Sugars make the pro
Increase in population size is known as population growth. It depends upon number of persons added to the population and number of persons lost from the population. Addition in pop
Explain National Nutritional Anaemia Prophylaxis Programme (NNAPP)? In past, both access to and intake of iron-folate tablets have been poor in children and therefore had a lit
What are the chemical elements that form most of living biological matter? The elements are:- a) oxygen (O), b) carbon (C), c) hydrogen (H) and d) Nitrogen (N).
How different are the endosperm of gymnosperms and the endosperm of angiosperms? In gymnosperms the endosperm is haploid (n), it is known as primary endosperm. In angiosperm th
Electron acceptor is a molecule which forms the part of the electron transport system which transfers electrons ejected by chlorophyll during the process of photosynthesis. Part o
DNA Cloning in biology is the process of producing similar populations of genetically identical individuals which happens in nature when organisms like as insects, bacteria or plan
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