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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.
Define the Blood Groups We start our discussion by answering the question - do all of us have the same blood group? No, each individual has a different blood group. The differ
.How did the geocentric theory change over time as increased scientific knowledge led to increased consensus within the scientific community?.
please explain cholecsystikinin and the gallbladder functions
Determine about the soil humus The organic constituents (organic colloids) are due to mainly the plants and partly the animals. They form only a small fraction and get transfo
Oil extraction : Extraction of oil from the prepared oilseeds can be done by one of the following methods: (i) traditional method: ghani, (ii) Improved methods:
Making a housing box for weather instruments Some of your weather instruments must be uncovered to the weather. Between these are the wind vane, the wind speed indicator and th
Explain Sinus Tachycardia - Electrocardiogram When the only abnormality is that the heart rate at rest is more than 100 per minute, the condition is known as sinus tachycardia.
What are the Advantages of Acid Soils The acid soils, formed by any of the above processes, behave as very strong acids so much so that pH is quite low even in partial convers
what types of birds are there
Experiments with man in space: We have already discussed the usefulness of space flights in Blocks 3&4. One is able to make astronomical observations from satellites; get met
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