Coffee is a kind beverage that is derived from the processing and extraction of seeds of the coffee plant. The word coffee is derived from the Arabic: qahwah which means strength, because the coffee was originally used as a high-energy food. Said qahwah back into kahveh changes derived from the
Turkish language and then changed again into koffie in Dutch.
In general, there are two types of coffee beans, the coffee arabica (best quality) and robusta coffee. History records that the discovery of coffee as a beverage nutritious and energetic first discovered by Ethiopian nation on the African continent about 3000 years (1000 BC) ago. Coffee and then continue to grow until today become one of the most popular beverage in the world is consumed by various circles of society. In addition to the appealing taste and aroma, coffee also may reduce the risk of cancer, diabetes, gallstones, and various heart diseases (cardiovascular).
Caffeine is an alkaloid chemical compound known as trimetilsantin with molecular formula C8H10N4O2. Substances amount of caffeine found in coffee is between 1 to 1.5%.
Drinking coffee could actually help us see the good side of life. A study showed that caffeine could help people recognize the positive words.
Researchers from Germany revealed by consuming caffeine, equivalent to two to three cups of coffee, a person is able to see the positive words more quickly in a series of experiments. Other psychologists have found that coffee drinkers do not have a similar effect when presented with negative words.
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