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Explain the Polycarbonate Nucleopore Filtre?
A given sample is filtered through a membrane filter, usually polycarbonate nucleopore filter with a pore size that will retain bacteria (generally 0.22 µm or 0.45 µm). Viable counts are made by placing the filter on agar medium plate or on an absorbent pad saturated with the culture medium. Alternatively, direct microscopic counts are made, the efficiency of which can be improved by using fluorescent dyes and epifluorescence microscope. Membrane filter technique can be used only for small samples of dilute homogenates.
what is nitrogen cycle?
Define Disadvantages of Using the Plate Counts Method? 1. It takes time, usually 24 hours or more is required to obtain visible colonies. 2. Microbial count obtained depends
What does Balanced Diet means Balanced Diet means diet which contains a variety of foods in such quantities and proportions that the need for energy, proteins, vitamins, minera
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Q What are some examples of tissues and organs where mitosis is more frequent, less frequent or practically absent? Generally in vertebrates mitosis is more frequent in tissues
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Coxal Glands There is a pair of coxal glands, in almost all the segments in Onychophora (Peripatus). Developmentally; in every segment a hollow follicle or somite arises and i
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