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Explain the Decolourizing Agent - Ziehl-Neelsen Method?
Acid alcohol - a mixture of 95% ethanol and 3% HCI - is used for decolourization. Before decolourization, smear is allowed to cool to make waxy substances hardened. As primary stain is more soluble in cellular waxes than in decolourizing solution, acid-fast bacteria retain the primary stain. However, all non-acid fast bacteria loose primary stain because of the lack of cellular waxes.
Nitrogen Fixation As we have said before, atmospheric nitrogen cannot be used by plants or animals. It has to be first fixed. The term nitrogen fixation refers to the oxidatio
Relate the oxide layer and biocompatibility of titanium. The compatibility of a metal with its host environment depends on its resistance to biodegradation and on the degree of
The Word 'disaster' is believed to be originating from the French word 'Disastre' which is a combination of two words 'des' meaning bad and 'astre' meaning star. Thus this term ref
Explain the Primary Stain - Ziehl-Neelsen Method? Ordinary aqueous stains like methylene blue, crystal violet, etc. are not able to stain most of the species of Mycobacteria. C
A detail note on cryptophyes
The frequency of an autosomal recessive disease in a population is 1 in a million. An unaffected person who had a sibling affected with this disease marries a lady from the pop
In a Population that is in Hardy-Weinberg equilibrium, the frequency of the recessive Homozygous genotype is 0.49. The frequency of individuals Homozygous for the Dominant allele i
Question 1 Write a short note on the following- Theory of clonal selection Interferons Super antigens Helper T cells Auto immunity Active Immunization
Q. Write the meaning of Metabolism? Metabolism is the set of chemical reactions that occur in living organisms in order to maintain life. These processes allow organisms to gro
Give one example in each case of the usefulness of bacteria in (a) a natural environment, (b) an industrial process. (a) In a natural environment bacteria brin
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