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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.
What are the functions of biotin and pantothenic acid for the body? How are these vitamins obtained? Biotin (also called as vitamin B8) is a vitamin that acts in the metabolism
It is said during puberty rising sex hormones stimulate osteoblasts to produce bone faster than the rate at which epiphyseal cartilage expands. The timing of epiphyseal closure dif
Psychology : This is the study of human mind. On other words Psychology is the science of behavior or mental processes. Its immediate aim is to understand the individuals or groups
Acute Mitral Regurgitation : Acute mitral regurgitation is an indication for early surgery. If patient is haemodynamically unstable, pre-operative intra aortic balloon pump
Explain the concpet of Dressing Dressing: Means medicine wound covering; a bandage or other sterile covering is put on a wound to protect it from infection or further damage.
SIGNIFICANCE OF FERTILIZATION - 1. In fertilization process number of chromosome are diploid in zygote. 2. During fertilization male & female chromosomes are combi
What is the lymphatic system? The lymphatic system is a network of specialized valved vessels that drain interstitial fluid (lymph). The lymphatic system is also responsible fo
Importance of diversity
Ganglia - Organisation of Nervous System In between higher non-chordates with a central nervous system, you will observe that the association neurons and motor neurons are con
whyis it considered to showintermideate grade oforganisation
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