Embryo in embryogenesis of Kuhol

The embryo’s of the P.canaliculata contains 90% of perivitellin fluid proteins. This fluid proteins sharply decreases as the embryo’s development proceed to stage 4 and 5. Most proteins are incorporated and used at these stages must have been consumed as energy source, nutrients and converted into other components. Basically, there is no net increase in embryo protein content until hatchlings stages 3 and 4. these observed stages has the...

over view on culture media

An appropriate culture media is needed for the proper growth and maintenance of a microorganism that is done in the laboratory. These specialized culture media are important in the identification and isolation of microorganism. Each microorganism varies in terms of their needs, such as energy, carbon, nitrogen, phosphorus, sulfur, and various minerals that they acquired in their specific culture media. It is necessary to have knowledge...

Morpholigical Description of E.coli

Escherichia coli is quickly identified in urine by the process of hemolysis that occurs in blood agar.  It is determined in a differential media such as EMB having a morphological feature of an iridescent “sheen”. It gives positive test for indole, lysine decarboxylase, and manitol fermentation and produces gas from glucos...

Culture Media Contains Nutrients for Culture Growth

Since Pasteur and Koch, microbiologists have tried to mimic the natural environment of bacteria in order to grow them in a laboratory. Beef broth is one medium used for cultivation of bacteria, or nutrient broth which contains water, beef extract and peptine, a nitrogen preparation from plant or animal sources. Agar is used to solidify the medium, upon the addition of this, the product is called nutrient agar. "Agar is a polysaccharide...

A Bacterial Growth Curve Illustrates the Dynamics of Growth in Culture Medium

In growing bacteria, a standard growth curve can be observed; it illustrates the events that occur over time within the population of bacteria. There are four distinct phases that take place: the lag phase, the logarithmic phase, the stationary phase and the decline phase. In the lag phase cover the first few hours of the curve, no cell divisions occur, because bacteria are adapting to the new environment. In cases of infection in the respiratory...

egg lipoprotein dynamics during embryogenesis

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