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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.
Explain the Intestinal Phase Rest 10% of the total gastric secretion is discharged in this phase. When partially digested contents of the stomach reach the duodenum, presenc
what is the significance?
Q. Do you know of any activity which may be polluting this water source? Answer: The discharge of waste water from homes, industries, hospitals, etc. into the river pollutes thi
Stars in the Limelight: Among Galilee's my discoveries with the telescope was his observation that the white nebulous band In the sky known as the Milky Way (Akash cranga) w
Forest and hill soils The hill and forest soils seem to be akin to soils developed in humid temperate regions, and have been found to include podsolised soils, brown Earths an
What are the properties of a cell?
Explain the Discovery of Cell Let us study here about the scientists who played a pioneer role in discovering the basic component of any living organism -the cell. Robert Hooke
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Classification of Fires As explained also. We can say that the four main sources of fire risk in the science laboratory are: i) flammable substances, ii) compressed and
Explain Inspiratory Capacity and Expiratory Reserve Volume Inspiratory Capacity (IC): It is the tidal volume and the volume of air taken during maximum inspiratory effort.
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