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Caffeine Properties Chemical formula. C 8 H 10 N 4 O 2: Molar mass: 194.194 g·mol −1 Appearance Odorless, white needles or powder Density: 1.23 g/cm 3, solid [1 ...
Coffee cherries A cup of black coffee Coffee is a brewed drink prepared from roasted coffee beans, the seeds found inside "berries" of the Coffea plant. Coffee plants are cultivated in over 70 countries, primarily in equatorial Latin America, Southeast Asia, India and Africa. The two most commonly grown are the highly regarded arabica, and the less sophisticated but more hardy robusta. The ...
Caffeine (1,3,7-trimethylxanthine) is the alkaloid most present in green and roasted coffee beans. The content of caffeine is between 1.0% and 2.5% by weight of dry green coffee beans. The content of caffeine does not change during maturation of green coffee beans, but higher caffeine content is found in plants grown at higher altitudes.
Caffeine is the world's most widely consumed psychoactive drug. [20] [21] Unlike most other psychoactive substances, caffeine remains largely unregulated and legal in nearly all parts of the world. Caffeine is also an outlier as its use is seen as socially acceptable in most cultures with it even being encouraged.
Instant coffee solids (also called soluble coffee, coffee crystals, coffee powder, or powdered coffee) refers to the dehydrated and packaged solids available at retail used to make instant coffee. Instant coffee solids are commercially prepared by either freeze-drying or spray drying , after which it can be rehydrated.
In the case of decaffeinated coffee, eliminating caffeine can cause a sharp decline in the natural taste of the coffee bean.During the process of decaffeination, the largest coffee producers in the world use a variety of ways to remove caffeine from coffee, often by means of chemical manipulation and the use of potentially harmful chemical components, such as methylene chloride or ethyl acetate.
The kola nut has a bitter flavor and contains caffeine. The nut is a nervous system stimulant and is chewed in many West African countries, in both private and social settings. [ 1 ] [ 7 ] It is often used ceremonially, presented to chiefs or guests.
According to the USDA National Nutrient Database, a 240-millilitre (8 US fl oz) cup of "coffee brewed from grounds" contains 95 mg caffeine, whereas an espresso (25 mL) contains 53 mg. [189] According to an article in the Journal of the American Dietetic Association, coffee has the following caffeine content, depending on how it is prepared: [186]