英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

caffeine    音标拼音: [kæf'in]
n. 咖啡因,茶精(兴奋剂)

咖啡因,茶精(兴奋剂)

caffeine
n 1: a bitter alkaloid found in coffee and tea that is
responsible for their stimulating effects [synonym: {caffeine},
{caffein}]

caffein \caf*fe"in\, Caffeine \Caf*fe"ine\, n. [Cf. F.
caf['e]ine. See {Coffee}.] (Chem.)
A white, bitter, crystallizable substance, found in coffee
and tea. It is identical with the alkaloid {theine} from tea
leaves, and with {guaranine} from guarana. It is responsible
for most of the stimulating effect of coffee or tea.
[1913 Webster WordNet 1.5]

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Caffeine: How much is too much? - Mayo Clinic
    How much is too much? Up to 400 milligrams (mg) of caffeine a day appears to be safe for most healthy adults That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks Keep in mind that the actual caffeine content in beverages varies widely, especially among energy drinks
  • Caffeine content for coffee, tea, soda and more - Mayo Clinic
    Find out how much caffeine is in coffee, tea, soda and energy drinks You may be getting more caffeine than you think you are
  • Butalbital, acetaminophen, and caffeine (oral route)
    Butalbital, acetaminophen, and caffeine combination is used to relieve symptoms of tension (or muscle contraction) headaches Butalbital belongs to the group of medicines called barbiturates
  • Caffeine: Is it dehydrating or not? - Mayo Clinic
    As a chemical, caffeine increases production of urine, which means caffeine is a diuretic But most research suggests that the fluid in caffeinated drinks balances the diuretic effect of typical caffeine levels High doses of caffeine taken all at once may increase the amount of urine the body makes This is more likely if you aren't used to caffeine Caffeinated drinks are available for every
  • Caffeine: Does it affect blood sugar? - Mayo Clinic
    For some people with diabetes, one cup of coffee may raise or lower blood sugar Learn how caffeine can affect blood sugar
  • Caffeine citrate (intravenous route) - Mayo Clinic
    Description Caffeine citrate injection is used to treat short-term apnea of prematurity when premature babies (infants between 28 and 32 weeks gestational age) stop breathing Apnea of prematurity is caused by the baby's breathing centers not being fully developed This medicine is available with or without your doctor's prescription
  • Caffeine: How does it affect blood pressure? - Mayo Clinic
    How does caffeine affect blood pressure? Caffeine may cause a brief rise in your blood pressure, even if you don't have high blood pressure This short-term spike in blood pressure happens mainly in people who don't drink caffeine often, rather than in those who do Still, the blood pressure response to caffeine differs from person to person
  • Cafeína: ¿qué cantidad es excesiva? - Mayo Clinic
    Si dependes de la cafeína para despertarte y seguir con tu día, no estás solo Millones de personas dependen de la cafeína todos los días para mantenerse alerta y mejorar su concentración ¿Qué cantidad de cafeína es excesiva? Hasta 400 miligramos (mg) de cafeína al día parece ser seguro
  • Yerba mate: Is it safe to drink? - Mayo Clinic
    Yerba mate, also known as mate, is an herbal tea It's a traditional drink in Latin and South America It's made by steeping dried leaves from the yerba mate plant in hot water Yerba mate can be served cold or hot Like black or green tea, it has caffeine, which can make you feel more alert and focused
  • Butalbital, acetaminophen, caffeine, and codeine (oral route)
    Description Butalbital, acetaminophen, caffeine, and codeine combination is used to relieve symptoms of tension (or muscle contraction) headaches Extended and repeated use of this product is not recommended Butalbital belongs to the group of medicines called barbiturates They act in the central nervous system (CNS) to produce their effects Acetaminophen is used to relieve pain and reduce





中文字典-英文字典  2005-2009