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Acute and Chronic Effects : The effects of accidents due to chemicals are severe and immediate on the human body. These effects are called acute effects and can be traced without difficulty. Frequently, poor lab practice or an unsafe system of work will lead to gradual poisoning. At first, effects may go unnoticed; or the effects may be attributed to the wrong cause. It may be hard to trace the real cause of these chronic or long term effects. In some cases, final results could be much worse than the immediate results. For instance, consider the effects of ingested alcohol:
1. Acute effect - drunkenness and vomiting
2. Chronic effect - addiction, liver damage, etc.
Safe lab practice will also minimize chronic effects. An example of good practice is ventilating the lab in the morning; this will minimize immediate poisoning or asphyxia (acute effect) and longer term poisoning (chronic effect) due to inhalation hazards.
Precautions : The following precautions should be taken while using UV lamps: 1) TJV lamps must always be properly shielded. 2)Wear approved goggles when working with or clo
How temperature influences the process of soil formation Temperature is another climatic agent which influences the process of soil formation. It affects the P/E ratio. If th
Atomic theory in antiquity: The oldest of Indian philosophical systems was Samkhya. The system envisaged that everything except consciousness evolved out of primaeval matter.
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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
What are the part of the ear.
Ecological Crises in Oceans and Coasts: Coastal and marine areas all over the world including those in India are under stress, because two thirds of the world's population li
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