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Introduction : In any laboratory dealing with biological experiments, hazards can occur mainly due to chemicals and biological materials. In the previous exercise you have done the activity of classifying hazardous chemicals and you also learnt the skill of handling such chemicals. In this exercise you will carry out the activities related to the disposal of biological materials after the experimental work with such materials is over. Disposal activities are related to microorganisms and dead animals. Since these materials cause contamination and infections very rapidly, more care is required in their disposal. Disposal of plant materials is comparatively simpler. Put all the used plant materials in a disposable bag, seal or tie the bag and put it in the waste collecting bins.
Disposal of Unserviceable and Obsolete Items : Every institution may have evolved its own procedure for the same. Generally the following procedure is used for the disposal of uns
What is the function of the connective tissue?
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Explosives : As defined earlier, explosives release a large amount of gas and energy in a very short time. These are of four basic types: Mixed gases - Usually the mixture
Define Erythroblastosis Fetalis Besides the risk of a mismatch reaction during a second or during any subsequent blood transfusion, giving Rh-positive, blood involves risk in
Floating a razor blade Secure a used razor blade of the double edge type. Try floating it on the surface of water. Again watch the surface and see if the surface film dips unde
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An experiment with a loop of thread Rinse a dinner plate methodically and then fill it with water. Make a loop with thread, open it a little and float it on the water. Touch th
Discuss in brief about the Red soils Red soils are characterised by a rusty red colour due in most cases to the presence of various oxides of iron. They are either formed in
What constellations does the ecliptic pass by? Where is the Celestial Equator (in relation to the planets & the ecliptic)? Are the planets east /west of your local meridian? Whe
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