咖啡因
- 名caffeine;caffein;thein
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[caffeine;theine] 又名咖啡碱
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咖啡因是兴奋剂,这是人所共知的事实。
It is a well-known fact that caffeine is a stimulant .
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咖啡中的咖啡因会使神经紧张。
The caffeine in coffee can jangle the nerves .
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脱咖啡因的咖啡仍含一些刺激物和其他可能致癌的有害物质。
Decaffeinated coffee still contains some stimulants and other nasties linked with cancer .
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咖啡因是茶、咖啡之类饮品中的活性成分。
Caffeine is the active constituent of drinks such as tea and coffee .
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咖啡因会引起心悸和头痛。
Caffeine can cause palpitations and headaches .
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咖啡因对人体健康有害。
Caffeine is bad for your health .
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凭经验估计,一杯过滤咖啡约含80毫克咖啡因。
As a rule of thumb , a cup of filter coffee contains about 80mg of caffeine .
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心悸可能是由于低血糖、咖啡因过量或抽烟过多。
The shaking inside may be due to low blood sugar , too much caffeine or too many cigarettes
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喝脱去咖啡因的咖啡是慢慢养成的嗜好。
Decaffeinated coffee is an acquired taste .
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在西非,人们咀嚼可乐果来作为兴奋剂已有较长的历史了,因为这些果实中含有咖啡因,在茶叶、咖啡和巧克力中也存在咖啡因。
In West Africa , people have long chewed kola nuts as stimulants , because they contain caffeine that also occurs naturally in tea , coffee , and chocolate .
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溶剂中的咖啡因相当于两杯浓咖啡,足以扭转这一影响,有的自行车手眼动速度甚至加快了。
The caffeine , the equivalent of two strong cups of coffee , was sufficient to reverse this effect , with some cyclists even displaying increased eye movement speeds .
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为了查明这一点,在3小时的_x0008_骑行中,研究人员给11名自行车手志愿者一支碳水化合物溶剂,有的含有适量的咖啡因,能够刺激中央神经系统;有的是作为安慰剂不含咖啡因。
To find out , researchers gave 11 volunteer cyclists a carbohydrate solution either with a moderate dose of caffeine , which is known to stimulate the central nervous system , or as a placebo without , during 3 hours of cycling .
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Caffeineandalcohol咖啡因和酒精咖啡因和酒精对身体似乎有两极性影响。
Caffeine and alcohol have seemingly polar effects on the body .
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有些能量条中包含大量的碳水化合物和咖啡因,以达到快速提神的效果。
Some power bars are loaded with carbohydrates or caffeine for quick jolts .
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研究人员也很想更细致地考察咖啡因与运动之间的关系。
The researchers were also keen to look in closer detail at the relationship between caffeine and exercise .
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虽然咖啡因可以让你清醒一段时间,但它不会让腺苷永远消失。
Though caffeine can keep you awake for a while in this way , it doesn 't cause all that adenosine to vanish forever .
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但由于咖啡因与腺苷相似,它会与这些受体结合,从而阻止腺苷与受体结合,让人保持清醒。
But since caffeine resembles adenosine , it binds3 to these receptors instead — blocking the actual adenosine from passing through and preventing your body from slowing down .
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最后一个原因是,你可能已经对咖啡因有了很高的耐受力,一杯咖啡已经不能像过去那样让你振作起来了。
Lastly , you may have built up such a high tolerance9 for caffeine that a cup of joe just doesn 't perk10 you up like it used to .
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研究人员收集了15名男性志愿者的数据后发现,如果按每公斤体重3毫克的量来摄入咖啡因,就可以提高有氧运动中的脂肪燃烧速度。
Researchers found that 3 milligrams of caffeine per kilogram of body weight can boost the rate of fat burning during aerobic1 exercise , based on results gathered from 15 male volunteers .
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有些人早上起来需要喝一杯浓咖啡或浓茶才能清醒,没有这些饮料中的咖啡因他们就会感觉无精打采,而且烦躁易怒。
Some people need a cup of strong coffee or tea in the morning to wake them up , without the caffeine in the drinks they will feel listless and irritable . Example :
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还有一种可能性是咖啡因的利尿性会导致脱水,这会让你感到疲劳(尽管一些研究表明咖啡因不会像我们所认为的那样导致脱水)。
There 's also the possibility that caffeine 's diuretic quality can cause dehydration7 , which can make you feel tired ( though some studies have suggested that caffeine doesn 't dehydrate8 us nearly as much as we 've been led to believe ) .
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在四周的时间里,参与研究的15名志愿者以随机顺序进行了4组测试:早上8点服用安慰剂;下午5点服用安慰剂;早上8点服用咖啡因补充剂;下午5点服用咖啡因补充剂。
Across the course of four weeks , the 15 volunteers in the study went through four tests in a random6 order : taking a placebo7 at 8 am , taking a placebo at 5 pm , taking a caffeine supplement at 8 am , and taking a caffeine supplement at 5 pm .
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Regular这个词对某些人还表示不脱咖啡因。
The word regular may also mean non-decaffeinated to some people .
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咖啡因对辐射诱导细胞凋亡和G2/M期阻滞的影响
Effect of caffeine on G_2 / M arrest and apoptosis induced by irradiation
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用咖啡因作代谢探针测定研究了203例健康志愿者的N-乙酰化表型。
Acetylator status in 203 healthy Chinese volunteers was determined with caffeine as a probe drug .
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样品经索氏提取器提取后,再以咖啡因-甲酸提取液提取,经乙酰化滤纸纸层析分离,用荧光薄层扫描法测定各样品中B(a)P的含量。
After combining extraction by caffeine and formic acid with PC-Scanning method , the B ( a ) P contents were obtained .
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咖啡因对胎鼠及乳鼠睾丸生殖细胞数量及合成DNA的影响
The effect of caffeine on the number and DNA content of germ cells in testes of fetal and newborn rats
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茶树咖啡因合成酶基因RNA干涉表达载体构建
Construction of Tea Caffeine Synthase Gene RNAi Vector
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目的:用HPLC法测定复方盐酸赛克力嗪片中的维生素B6、咖啡因和盐酸赛克力嗪的含量。
Objective : Vitamin B_6 , Caffeine and Cyclizine Hydrochloride were determined by HPLC in compound Cyclizine Hydrochloride tablets .
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碳基型催化剂治理咖啡因车间高浓度NOx废气的应用试验
Treating High Concentration NOx in Coffein Workshop with a Carbon-base Catalyst