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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. Carbol fuchsin, a red mixture of basic fuchsin and phenol can be used for staining these bacteria. Basic fuchsin, binds to carboxylic acid group of mycolic acid and phenol enhances penetration of basic fuchsin into lipid. Penetration is further enhanced by slow heating to steaming for 2-3 minutes. This drives the stain inside the cytoplasm. In modified Ziehl-Neelsen method, instead of heating, a wetting agent - Turgitol - can be added to the stain. This agent reduces surface tension between the cell wall of the mycobacteria and the stain. After staining, all cells become red.
Insect resistant crops (IRC) Insects are a natural selection pressure so plants resistant to certain insects could have an evolutionary advantage (in natural environments)
The Environmental Disasters Are Classified Into Two Major Categories: 1. Natural Disasters like Earthquakes, Tsunami, Landslides, Cyclones, Floods, and Droughts Etc. 2.
What is tetrapoda
Syngamy - Protozoan The two gametes may be morphologically similar (isogametes) or dissimilar (anisogametes). The gametes also vary in form, they may be flagellated or amoeboi
Define Sample Titration - estimation of vitamin c in chillies? Take a clean and dry large chilli and weigh it. Note the weight of the chilli. Grind the chilli to a fine paste i
What do you understand by Arthropodization? Many of the traits that we consider unique to the Arthropoda may not be independent traits. Instead, they may be the consequence of
There may also be non-use existence values for components of biological diversity due to the value placed on biodiversity purely based on its continued existence, irrespective of w
MENSTRUAL CYCLE - It occurs only in Primates. Start at the age of 13 yrs. upto menopouse. During this period, generally one egg is released every 28 dyas or so alternately f
how trematodes/nematodes adapt to their parasitic mode of feeding
Differance between Descending Thoracic or Abdominal Aneurysm ? Descending Thoracic Aortic and Thoraco-Abdominal Aneurysm : The approach is through n left postero-lat
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