马克思认为烟草在习惯上是必要的消费资料。它之所以成为消费资料,是因具有特有的生物碱,生物碱的主要成分为尼古丁,又称烟碱或烟精,它能刺激中枢神经末梢,使之兴奋,增加呼吸,升高血压,而后满足生理上的需要。当前“两烟”生产上的主要问题是品质,而烟叶品质与尼古丁含量密切相关。因为尼古丁是烟叶品质化学成分的重要指标,尼古丁含量少就抽而无味,反之,则香气浓,吃味好。有人认为尼古丁含量超过2%时烟味才强,也有人 According to Marx, tobacco is customary to consume information. The reason why it has become a consumer information, because of its unique alkaloid, the main component of alkaloids nicotine, also known as nicotine or soot, it can stimulate the central nerve endings, so excited, increase breathing, increase blood pressure, and then Meet the physiological needs. At present, the main problem in the production of “two cigarettes” is the quality, while the quality of the tobacco leaf is closely related to the nicotine content. Because nicotine is an important indicator of the chemical composition of tobacco quality, nicotine less pumping on the tasteless, on the contrary, the aroma thick, good taste. Some people think nicotine content of more than 2% when the tobacco smell was strong, but also some people