what in tobacco is harmful chemicals are a cigarette? | What does smoking do to your body? Cigarette Smoking | Smoking and

Tobacco-specific nitrosamines (TSNAs) are the most studied compounds found only in tobacco and tobacco smoke.4 TSNAs contain the functional group N-N=O and are formed by nitrosation of alkaloids during fermentation, curing and burning of the tobacco leaf

(With few exceptions, hospitals did not prohibit smoking until the 1990s, and then only because the Joint Commission for the Accreditation of Hospitals [JCAH] finally mandated this policy

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In 1937, Holmes reported that not all plants of a seed lot responded similarity to infection, suggesting the possibility of a contaminant of the seed lot due to inadvertent mixing of seeds (Holmes, 1937, p