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Explain Counter Stain - Ziehl-Neelsen Method?
Methylene blue is used to stain previously decolourized cells. All non acid-fast bacteria de-stained by acid alcohol now absorbs counter stain and takes on its blue colour. All acid-fast bacteria remained red in colour due to primary stain.
Genus Mycobacterium shows acid fastness. These are aerobic, slightly curved or straight rods that sometimes branch or form filaments. These filaments readily break down into rods and coccoid bodies, when disturbed. Some grow very slowly. Some are free-living saprophytes and some are pathogens, e.g. M. bovis could cause tuberculosis in cattles, M. tuberculosis causes tuberculosis in humans, M leprae causes leprosy in humans. Acid-fast stain has a diagnostic value in identifying these pathogenic mycobacteria.
Crisis due to Deforestation Due to continuing deforestation we are faced with a major ecological and socio-economic crisis. To reverse this trend of deforestation a National
D uck septicemia (duck pasteurellosis/new duck disease) The disease is caused by Pasteruella anatipestifer (Syn. Riemerella anatipestifer ) that mostly affects growing duck
Transfer RNA (tRNA) molecules play an very significant role in protein synthesis. Each tRNA becomes covalently bonded to a particular amino acid to create aminoacyl- t
Staphylococcosis The disease is caused by the ingestion of preformed toxin released by Staphylococcus aureus. Epidemiology: Staphylococci grow in meat, dairy and bakery prod
Carpentier -Edwards Valve (C-E) : This is porcine aortic valve preserved in gluteraldehyde and mounted on flexible stent made of cobalt-chromium-nickel alloy (ELGILOY). Glut
Valves of the Heart There are four valves which are flap-like structures that function to maintain unidirectional (forward) blood flow through the heart chambers. These va
Define Interactions between Volatile Substances and Proteins? Flavour binding may involve adsorption at the surface of food or penetration to the food interiority by diffusion
A lk a l in e indigestion The disease occurs due to the consumption of excessive amount of protein rich concentrate or non protein nitrogenous substance like urea, and is
Q. Can you explain Secondary Metabolites? Secondary metabolites or secondary plant products are those macromolecules that lack nitrogen and arc of restricted occurrence and the
State the term - Molybdenum Molybdenum is intimately related to nitrogen metabolism of plants. It is part of the nitrate reductase system which helps to utilise nitrate for n
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