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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.
Mechanical requirements of implant materials Dental implant s must be able to sustain and transfer loads -It should have adequate mechanical strength in order to distribute th
Q. How different are the concepts of neoplasia, tumor and cancer? Not all tumor is neoplastic and not every neoplasia creates tumor. The Tumor is the generic name given to the
waht is meant bu warren.?
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Tunnel Subvalvar Stenosis : This variety is less common and extends from sub aortic area for a variable length of 10-30 mms (tunnel stenosis). In the severe variety, the tun
what are the principle sources of excessive nitrate and phosphate in rivers and lakes?
Management Goals Improve oxygenations and ventilation to restore the person/s Pa 2 O 2 and PaCO 2 , to their previous levels. Understand the underlying cause.
Define biomaterial and an implant and state their role in general Biomaterial : A pharmacologically inert material that is capable of interacting with a living organism witho
If water dousing, homeopathic cures, and so on work for just me but not for anyone else, it is still science.
Susceptible Organisms When infection proves to be caused by a fully susceptible strain of TB, the initial phase of treatment should include isoniazid, rifampin and pyrazinamid
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