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An alpha privative or, rarely, [1] privative a (from Latin alpha prīvātīvum, from Ancient Greek α στερητικόν) is the prefix a-or an-(before vowels) that is used in Indo-European languages such as Sanskrit and Greek and in words borrowed therefrom to express negation or absence, for example the English words of Greek origin atypical, anesthetic, and analgesic.
a-, called alpha privative, from Ancient Greek ἀ-, ἀν-, from Proto-Hellenic *ə-; e.g. apathetic, abiogenesis. These all stem from a PIE syllabic nasal privative *n̥-, the zero ablaut grade of the negation *ne, i.e. "n" used as a vowel, as in some English pronunciations of "button". This is the source of the 'n' in 'an-' privative ...
Alcohol does not necessarily kill brain cells. [374] Alcohol can, however, lead indirectly to the death of brain cells in two ways. First, in chronic, heavy alcohol users whose brains have adapted to the effects of alcohol, abrupt ceasing following heavy use can cause excitotoxicity leading to cellular death in multiple areas of the brain. [375]
β-Alanine (beta-alanine) is a naturally occurring beta amino acid, which is an amino acid in which the amino group is attached to the β-carbon (i.e. the carbon two carbon atoms away from the carboxylate group) instead of the more usual α-carbon for alanine (α-alanine).
Alcohol dehydrogenase 1A is an enzyme that in humans is encoded by the ADH1A gene. [ 5 ] [ 6 ] This gene encodes class I alcohol dehydrogenase, alpha subunit, which is a member of the alcohol dehydrogenase family.
Alcohol, like other foods and drinks that are high in sugar, can not only add unwanted pounds, but may also contribute to the accumulation of belly fat, which is associated with heart disease and ...
Alanine (symbol Ala or A), [4] or α-alanine, is an α-amino acid that is used in the biosynthesis of proteins.It contains an amine group and a carboxylic acid group, both attached to the central carbon atom which also carries a methyl group side chain.
Phenylalanine (symbol Phe or F) [3] is an essential α-amino acid with the formula C 9 H 11 NO 2.It can be viewed as a benzyl group substituted for the methyl group of alanine, or a phenyl group in place of a terminal hydrogen of alanine.