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Ultraviolet Radiations : The ultraviolet (UV) light has higher energy than visible light. Hydrogen lamps, deuterium lamps and other sources of ultra-violet are used for a variety of purposes in physical, chemical and biological laboratories. These applications include spectroscopy. The sterilisation of instruments, the initiation of chemical reactions and the detection of purines and other substances which fluoresce when irradiated with UV light in chromatography and other separation techniques. Ultraviolet sources may be recognised by their intense pale blue illumination, for example mercury vapour lamps and high voltage sparks and arc emitted at the time of welding.
Q. List any three human activities which would lead to an increase in the carbon dioxide content of air (i) Burning of fuels in various processes like heating, cooking, transpor
Use the following procedure for fire fighting. (1) Always take a position between the fire and the exit so your escape route cannot be cut off. Fire extinguishers should always
First Hominids The First Human Fossil The earliest human like or hominid remains come from two separate East African sites. Ethiopia has yielded several hundred fossil fragment
Air expands when heated To show that air expands when heated, fit an electric light bulb flask or a bottle with a single- whole stopper or cork which has a 30-cm length of glas
Imagine a small observer is positioned in front of cork in your picture above. As the cork approaches, the observer measures the wavelength of the waves passing by. How does this w
Assembling First Aid Box : Your Counsellor will show you the contents of the first aid box available at the Study Centre. You observe the contents. As part of this activity, yo
Define EDTA Titrimetric Method for Estimation of Calcium? The amount of calcium in any sample can be estimated by EDTA titrimetric method. The principle behind this method is d
my topic is QTL mapping of Aedes and Drosophila and I am not getting proper information for making an assignment on it what should I do?
Explain Temperature Regulation - Physiology of Growth and Development Surface area of the infant per unit weight is larger than the adult; hence infant loses/gains heat from th
What is Soil Taxonomy The concept of soils as natural bodies was first developed by Russian soil scientist V.V Dokuchaev and his associates when they noted the relationship p a
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