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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.
Stratification - Aquatic ecosystems Aquatic ecosystems also exhibit marked stratification. In lake and ocean ecosystems light penetration, temperature and availability of oxyg
Introduction: There are different technologies available for dealing with waste water management and excreta. Some are suitable for dealing off-site sanitation and other can b
Q. What is Autoclave sterilization? Word "autoclave" means self locking and is used to denote an apparatus that sterilizes by use of steam under pressure. It operates on same
What is the difference among essential and natural amino acids? Essential amino acids are those that the organism is not able to synthesize and that require to be ingested by t
Shell - body form Protozoans Majority of protozoans posses an exoskeleton in the form of a shell, also called test. The shell forms a loose covering around the body of the ani
Hypolimnion - Summer Stratification This zone forms the bottom layer which is deep, cold and non- circulating. The hypolimnion is generally rich in nutrients though its oxygen
Describe the appearance of a single E. coli colony. Why can it be considered genetically homogenous?
Human Impact on the Phosphorus Cycle Like other biogeochemical cycles, human activities have altered the phosphorus cycle. Human beings mine phosphate rocks and guano deposits
How does refrigeration help to stop food from going bad? Western diets are often unhealthy due to they have too much sugar and fat, and not sufficient fibre.
What is the importance of vitamin A The importance of vitamin A is undisputable. You may already be aware about the functions/role of vitamin A in our body. Vitamin A is absol
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