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INTRODUCTION : In the first unit of this block you read about hazards due to electricity and gases in the science laboratories. 'The second unit deals with yet another type of common hazard which is because of fire. The consequences of fire are well known; still many do not take enough precautions and preventive measures. According to National Crime Record Bureau, the number of deaths in our country due to fire accede its during 1994 and 1995 are 23050 and 21226, respectively. The person-in-charge of any laboratory should have a knowledge to handle a fire hazard. In case the fire spreads beyond control, the laboratory staff should know how to call the fire brigade, raise the alarm and ask for other help. In this unit, you will learn about the major causes of fire, its classification, precautions and prevention. You will also learn about the fire extinguishers. The next unit deals with hazards in handling chemical and radioactive materials.
INTRODUCTION: Here, we shall explain the regulations which are directly or indirectly concerned with laboratory work. These regulations have legal validity. As compared to laborat
The Sun is the most important star from our point of view. It is the only star close enough to be studied in considerable detail. The grandeur of the Sun is partly because of
Age Related Differences in Erythropoiesis 1. During intrauterine life, in the early embryo, erythropoiesis occurs in the mesoderm (the middle of the three germ layers of an emb
Why does a glacier move? It moves due to the huge pressure of the ice and snow lowers the freezing point of its lower layers, causing by to melt.
The Asteroid Belt-Rubble of the Solar System: There is a gap of 547 million kilometers, between the orbits of Mars and Jupiter. In this gap are thousands of bodies made of ro
Physical Properties of Amino acid:- Solubility : Amino acids are readily soluble in water, slightly soluble to insoluble in ethanol and insoluble in ether. Tyrosine is solubl
Venus-the Clouded Planet Venus, our nearest planetary neighbour, only 40 million km away, has its surface hidden from view by a dense yellowish-white cloud, which extends to 80
Contents of First Aid Box : The minimum contents of a first aid box are given. In addition, the first aid box should carry on it the name of the person responsible for its content
1. Sketch and explain different regions of phase diagram of water (pressure vs. temperature). 2. Explain how air inhalation and expiration takes place through pressure gradient
Objectives After studying this unit, you should be able to: 1. Categorise different radiations into ionising and no ionising types, 2. Explain the effects of radiations
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