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Explain the Turbidity Measurement?
Presence of sufficient number of microbes makes the liquid medium turbid. Turbidity also increases with the multiplication of microbes. Estimation of turbidity can be used both for the quantitation of microbes and monitoring microbial growth. The technique depends on the fact that cells scatter the light striking them and the amount of scattering is directly proportional to the biomass of cells present and indirectly to the cell number. The scattering of light can be measured by spectrophotometer or photometer. In the instrument, a beam of light is passed through a cell suspension and the amount of unscattered light is detected by a light sensitive detector. Photometer uses a simple filter to generate incident light whereas in spectrophotometer, prism is used instead of a filter. Commonly used wavelengths for bacteria are 540 nm, 600 nm and 660 nm. More the number of microbes in the suspension, less is the light reaching to the detector and read as percent transmission or absorbance (OD, optical density, a logarithmic expression).
Explain Red anthocyanin pigments Red anthocyanin pigments from miracle fruit were isolated and tested in carbonated beverages, in combination with the organic acids. Pigments d
Define Absorption of Zinc - Micro Minerals? Like iron, zinc also needs to be liberated from food prior to absorption. During digestive process; proteases, nucleases and hydroch
Why after the passage of animals from the aquatic to the terrestrial habitat does the abandonment of the ammoniotelic excretion occur? Ammonia is a highly toxic molecule if not
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 bac
Phosphorus deficiency Deficiency of phosphorus is usually primary and is widespread under natural conditions. It is characterized by pica, poor growth, infertility, and osteody
Element Required By Higher Plants Table shows the list of sixteen elements that fulfil the criteria of essentiality stated above, their approximate adequate concentration and
Q. Control of Aflatoxin? Control: Because aflatoxins are potentially widespread in occurrence and have an insidious combination of acute and chronic toxicity, it is prudent to
what is meant by "pelagic"?
Illustrate the name of surgical needle The surgical needle is comprised of 3 parts: the needle point, the needle body, and the swaged (press-fit) end. Needle may be broadl
a) Mention the number of primers needed in each cycle of polymerase chain Reaction (PCR) . Write the role of primers and DNA polymerase in PCR. b) Give the characteristic fea
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