咖啡因

Thin-layer chromatography ; ultraviolet spectrophotometry ; aspirin ; phenacetin ; caffeine

薄层层析法；紫外分光光度法；阿斯匹林；非那西丁；咖啡因

The mean recovery of phenacetin,caffeine,phenobabital and aminophenazone were 100.4%,100.3%,99.5%,and 100.4% respectively.

非那西丁、咖啡因、苯巴比妥、氨基比林的平均回收率分别为100.4%，100.3%，99.5%和100.4%，RSD分别为0.90%，1.9%，1.8%，1.6%(n=6)。

Results: The RSD of retention time of the target components was not more than 0.48%, and the limits of detection were within 0.1~0.9 ng. Caffeine, phenolphthalein and sibutramine were detected in 20 of the total 29 samples.

结果：各被测组分保留时间的RSD不超过0.48%(n=7)；最低检测限为0.1~1.9ng；在29批供试样品的20批中检测到咖啡因、酚酞和西布曲明。

Aim:To seek the technology route on how to extract tea polyphenol and caffeine with high purity and high yield.

目的 ：寻找一条从茶叶中同时提取高纯度、高收率的茶多酚和咖啡因的工艺路线。

Although caffeine is often recommended as treatment for postprandial hypotension, available data do not support its use.

尽管咖啡因常推荐用来治疗餐后低血压，但是没有足够有用的资料支持这一用途。

For example, adaptation to caffeine appears to potentiate a sweet taste from water.

举例来说：适应了苦味的咖啡因后会对水产生一种甜味。

The commonest precipitant was exercise in nearly 19% of patients , followed by eating in 8%.

最常见的促发事件是运动，几乎占19%，其次是饮食，占8%，饮用含咖啡因的饮品仅占2.4%。

Therefore, using caffeine as a preventative method in migraine relief can be done in two ways.

因此，使用咖啡因作为一项预防方法，在偏头痛的救济可以做在两个方面。

His research, published in the October issue of Psychopharmacology, analyzes 66 previous studies on the effects of caffeine withdrawal.

他的研究刊登在精神病理学杂志的第10月期上，其中分析了咖啡因吊瘾反应的66份前人研究成果。

It's just a possibility,' says Jim Lane, a psychophysiologist at Duke University Medical Center who has studied the effects of caffeine for more than 25 years.

这只是一种可能性，杜克大学医学中心的心理生理学家吉姆·雷因表示。雷因对咖啡因效用的研究已经超过了25年。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。