以及唾液咖啡因清除率 Caffeine saliva clearance
以杉木屑为原料制备木质纤维素，采用静态吸附、蒸馏水和80%乙醇分段洗脱等实验，研究其对茶儿茶素类及咖啡因选择性吸附作用。
Lignocellulose was prepared from cedar sawdust and used to isolate caffeine and tea catechins from tea extract by static adsorption and gradient elution using water and 80% ethanol.
该项在美国20个主要城市开展的调查共有两千人参加，主要针对咖啡、茶、巧克力、苏打水、能量饮品及咖啡因片剂在这些城市的消费情况进行了访问。
The survey looked at consumption of coffee, tea, chocolate, sodas, energy drinks and caffeine pills in 20 major cities in the United States by interviewing 2, 000 people.
该项在美国20个主要城市开展的调查共有两千人参加， 主要针对咖啡、茶、巧克力、苏打水、能量饮品及咖啡因片剂在这些城市的消费情况进行了访问。
The survey looked at consumption of coffee, tea, chocolate, sodas, energy drinks and caffeine pills in 20 major cities in the United States by interviewing 2,000 people.
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