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India

Subject: History

The world's largest democracy has a rich and diverse culture. Now, it is also achieving more rapid economic growth India's vast territory can be divided into three main regions ...

tobacco

tobacco n.   Quick reference

A Dictionary of Dentistry

Reference type:
Subject Reference
Current Version:
2010
Subject:
Medicine and health, Dentistry
Length:
169 words

...family indigenous to North and South America, or the dried leaves of such plants. The tobacco leaves may be smoked, in the form of cigarettes, cigars, or as pipe tobacco, inhaled as snuff , or chewed. Tobacco may be added to betel quid and chewed; this is a common practice in India. Over 60 carcinogens are present in tobacco smoke and 28 have been identified in tobacco for oral use; these include benzo(a)pyrine, volatile aldehydes, nitrosamines, inorganic compounds, and radionucleotides. Tobacco contains the neurotoxin nicotine , which is absorbed into...

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