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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).
Describe the Phylum Chordata in animal kingdom? This is the other group of animals along with the Echinodermata whose anus develops prior to the mouth's development in the embr
Define about the Calcium - Macro minerals? Among minerals, calcium (Ca) is the most abundantly present in humans, representing 52% of the body's mineral content and amounting t
meaning of the law of inertia
In almost all animal groups, the mode of speciation is geographic speciation. It is essential that a population which is a prospective new species is geographically isolated from t
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
defitionce of vitamin d
Main successful vaccines are live attenuated and heat killed vaccines.
What is the mode of nutrition of Ascaris?
What differences would you expect to see among pea seedlings grown for 10 days in total darkness and pea seedlings grown in the light for the similar period of time? The s
Mechanisms Of Endosseous Integration Three terms may be used to describe individual aspects of bone formation process that can occur around implants. They are Osteoconduction,
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