Nakht was an ancient Egyptian official who held the position of a scribe and astronomer of Amun, probably during the reign of Thutmose IV of the Eighteenth Dynasty. He was buried in the Theban Necropolis in tomb TT52.
Nakht was an ancient Egyptian official who held the position of a scribe and astronomer of Amun, probably during the reign of Thutmose IV of the Eighteenth Dynasty. He was buried in the Theban Necropolis in tomb TT52.
Human uses of plants include both practical uses, such as for food, clothing, and medicine, and symbolic uses, such as in art, mythology and literature. Materials derived from plants are collectively called plant products.
Edible plants have long been a source of nutrition for humans, and the reliable provision of food through agriculture and horticulture is the basis of civilization since the Neolithic Revolution. Medicinal herbs were and still remain to be the key ingredients of many traditional medicine practices, as well as being raw materials for some modern pharmaceuticals. The study of plant uses by native peoples is ethnobotany, while economic botany focuses on modern cultivated plants. Plants are also used as feedstock for many industrial products including timber, paper and textiles, as well as a wide range of chemicals.
In food processing, fermentation is the conversion of carbohydrates to alcohol or organic acids using microorganisms—yeasts or bacteria—without an oxidizing agent being used in the reaction. Fermentation usually implies that the action of microorganisms is desired. The science of fermentation is known as zymology or zymurgy.
The term "fermentation" sometimes refers specifically to the chemical conversion of sugars into ethanol, producing alcoholic drinks such as wine, beer, and cider. However, similar processes take place in the leavening of bread (CO2 produced by yeast activity), and in the preservation of sour foods with the production of lactic acid, such as in sauerkraut and yogurt.