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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.
Signify the term in details - Pseudocoelom. A body cavity that isn't completely lined by mesoderm. Mesoderm is associated with only the ectodermal surface but not endoderm. The
What are Antifoaming Agents In food industries, undesirable foams may be formed such as in concentration of fruit juices, coffee extracts, vegetable oils and syrups or in ferm
Oceanic islands are interesting and somewhat specialised biomes. Islands which have broken away from the main continents have similarity of flora and fauna related to the continent
What are the typical vegetation and the typical fauna of the taigas? Taiga, or the boreal forest, is characterized by coniferous trees, pine forests. There are also mosses, lic
The environmental pollution has become a biggest threat to humanity. To over-come this problem a suitable preventive legislation is need of hour. The problems of acid rain ,ozone
Studying the main parts of a flower Study specimens of large easy flowers such as tulips or lilies. Count the stamens and observe how they are arranged about the central pistil
What is telophase? Telophase is the cell divides apart and screws itself.
Q What is the name of the membrane with the intention of delimits the nucleus? To which component of the cell structure is that membrane contiguous? The nuclear membrane is als
scientific name of apple
In humans, maleness or femaleness is determined by a pair of sex chromosomes called X and Y. (a) What is the genotype for males? (b) What is the genot
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