| pyrenoid |
In cell biology, pyrenoids are centers of carbon dioxide fixation. They are not membrane-bound organelles, but specialized areas in algal plastids and contain high amounts of ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO). RubisCO takes carbon dioxide and adds it to the sugar ribulose-1,5-bisphosphate. It needs six molecules of carbon dioxide and six molecules of ribulose-1,5-bisphosphate = six cycles of the Calvin cycle to make one new molecule of glucose. ...
출처: en.wikipedia.org/wiki/Pyrenoid
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| pyrocatechol |
Benzenediols or dihydroxybenzenes are aromatic chemical compounds in which two hydroxyl groups are substituted onto a benzene ring. Because they have at least one hydroxyl group covalently bonded directly to a carbon atom in a benzene ring, they are in a class of organic compounds called phenols. There are three isomers of bezenediol, each of which has its own common or non-systematic name as shown in the mini-table below. ...
출처: en.wikipedia.org/wiki/Pyrocatechol
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| pyrophosphoric acid |
Pyrophosphoric acid, also known under the name diphosphoric acid, is a syrupy liquid or a needle-like crystaline solid. Pyrophosphoric acid is colorless, odorless, hygroscopic and is soluble in water, diethyl ether, and ethyl alcohol. It is the anhydride of phosphoric acid and is produced from phosphoric acid by dehydration. Pyrophosphoric acid is a medium strong inorganic acid. The anion, the salts, and the esters of pyrophosphoric acid are called pyrophosphates. ...
출처: en.wikipedia.org/wiki/Pyrophosphoric_acid
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| pygmy |
Pygmy goats are small in stature weighing about 50–75 lb (23–34 kg) for females and about 60–85 lb (27–39 kg) for males. First imported into the United States in the 1950's from Africa, these small goats are popular for pets and exhibition, although they produce a large quantity of milk for their size and can be eaten, pygmy goats are not typically used for the production of milk or meat, unlike larger dairy and meat goat breeds. ...
출처: en.wikipedia.org/wiki/Pygmy_(goat)
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| pyramidal |
A pyramid is a geometric shape formed by connecting a polygonal base and a point, called the apex, by triangular faces. When unspecified the base is usually assumed to be square. One of the Platonic solids, the tetrahedron, is a triangular pyramid. The square and pentagonal pyramids can also be constructed with all faces regular, and so count among the Johnson solids. All pyramids are self-dual. ...
출처: en.wikipedia.org/wiki/Pyramidal
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