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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.
RECAPITUL A TIO N THEORY / BIOGENETIC LAW It was proposed by Muller & Haeckel on the basis of Baer's law. According to it, in the development of animal phylum characters
whats polymorphic
Zooflagellates – Protozoan Zooflagellates are heterotrophs that are free living, commensals or symbiotic or parasitic in other animals. A number of species eg. Trichonynzpha a
Define Types of Non Enzymatic Browning Reaction? Two major types of non enzymatic browning reaction have been recognized to occur in foods during processing. 1. Maillard Rea
Define interaction of folate with vitamin B 12 ? Vitamin B 12 : For the conversion of folic acid to folinic acid, vitamin B 12 is required. Vitamin BIZ deficiency caus
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what is filter feeding?..
Problems of Osmoregulation The water, some inorganic salts, nutrient molecules are some of the important components of the body fluids. It is essential for the animals to main
Explain the Management of Apical Canal Impediment Well angulated radiograph Coronal pre-flaring Pulp champer flooded with sodium hypochlorite Coronal passive
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