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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.
Syphilis and HIV Most clinicians treat HIV-infected patients with syphilis and normal CSF with standard penicillin doses for the stage of syphilis, but some patients may need
Do the genes of the X and Y chromosomes determine only sex characteristics? Moreover sex genes the sex chromosomes have also autosomal genes, genes that codify several proteins
Explain the main function of the digestive system The major function of the digestive system is to ingest the food materials, digest it to absorbable end products, absorb the
transport systerms
DISORDER S OF MALE REPRODUCTIVE SYSTEM (i) Prostatomegaly - Enlargment of prostate gland. It causes difficult & painful micturition. (ii) Impotence - Inability of male
What are the endocrine functions of the placenta? The placenta has endocrine function since it secretes the hormones progesterone and estrogen that maintain the endometrium (in
Q. What is the structure that to maintains identical chromatids bound? The structure that to maintains identical chromatids bound is the centromere.
Explain the Factors Influencing RS Content -Amylose or Amylopectiz ratio? Amylose/Amylopectirz ratio: In general, foods containing high amylose/amylopectin ratio lead to higher
URINIFEROU S TUBULE - Unit of kidney. 3-5 cm. long (30 mm). Total length of nephrons is 65 km. A tubule consists of - 1 . Malpighian capsule (
Q. Which are the subproducts of the photochemical phase that are essential for the chemical stage of photosynthesis? The chemical stage of photosynthesis depends on ATP and NAD
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