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Explain the Gram Staining technique?
Gram staining is a differential staining procedure which divides bacteria into two groups: Gram positive and Gram negative, based on staining properties. The gram stain was developed in 1884 by the Danish Physician, Dr. Christian Gram. It is one of the most important and widely employed staining procedure in bacteriology.
It is very useful and is almost essential in identifying an unknown bacteria. The basis of gram staining is the difference in cell wall composition of two types of bacterial cells. Gram positives have thick cell wall, made up of multi-layered peptidoglycan with extensive cross-linking. On the other hand, gram negative cell wall has a very thin peptidoglycan layer surrounded by outer lipid rich outer membrane. There is no outer membrane in case of gram positives. This difference in cell wall leads to decolourization of gram negatives but not gram positives by decolourizing agent i.e., ethanol or acetone.
Noise Exposures - Factors Affecting Occupational Health Various equipment and processes generate noise of varying intensity and - frequency. In this respect ventilation system
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Explain the Importance of Biochemical Tests? Specific series of biochemical tests have been developed for fast identification of microorganisms in laboratories. These biochemic
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Resective therapy Is used to reduce pockets, correct negative osseous architecture and rough implant surfaces and increase the area of keratinized gingival if needed. Apical
A fire hose ejects a stream of water at an angle of 38.8 ° above the horizontal. The water leaves the nozzle with a speed of 26.6 m/s. Assuming that the water behaves like a projec
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Why have biologists and bioinformaticians embraced the Web as a vehicle for disseminating data so quickly, whereas clinicians and clinical informaticians have been more hesitant to
To prevent and control Staphylococcal food poisoning: • Avoid contamination of foods • Kill organism by heating, refrigeration • Personnel hygiene • Adequate cookin
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