In organic chemistry, the alpha carbon (Cα) refers to the first carbon atom that attaches to a functional group, such as a carbonyl.The second carbon atom is called the beta carbon (Cβ), and the naming system continues in Greek alphabetical order.. The nomenclature can also be applied to the hydrogen atoms attached to the carbon atoms. A hydrogen atom attached to an …

Helium accumulates in the cores of stars as a result of the proton–proton chain reaction and the carbon–nitrogen–oxygen cycle.. Nuclear fusion reaction of two helium-4 nuclei produces beryllium-8, which is highly unstable, and decays back into smaller nuclei with a half-life of 8.19 × 10 −17 s, unless within that time a third alpha particle fuses with the beryllium-8 nucleus to ...

Production and activity. The enzyme is produced in many tissues in both males and females, in the reproductive tract, testes and ovaries, skin, seminal vesicles, prostate, epididymis and many organs, including the Nervous System. There are three isoenzymes of 5α-reductase: steroid 5α-reductase 1, 2, and 3 (SRD5A1, SRD5A2 and SRD5A3).. 5α-Reductases act on 3-oxo (3-keto), …

α-Hydroxy acids, or alpha hydroxy acids (AHAs), are a class of chemical compounds that consist of a carboxylic acid with a hydroxyl group substituent on the adjacent (alpha) carbon. Prominent examples are glycolic acid, lactic acid, mandelic acid, and citric acid.. Although these compounds are related to the ordinary carboxylic acids and are therefore weak acids, their chemical …

alpha-Linolenic acid (ALA), also known as α-Linolenic acid (from Greek alpha meaning "first" and linon meaning flax), is an n−3, or omega-3, essential fatty acid.ALA is found in many seeds and oils, including flaxseed, walnuts, chia, hemp, and many common vegetable oils.. In terms of its structure, it is named all-cis-9,12,15-octadecatrienoic acid.

Alpha Phi Omega chapters in the United States are the basic organizational divisions of the Alpha Phi Omega fraternity at accredited U.S. college and university campuses. [1] [2] These chapters execute the fraternity national programs to provide opportunities for the development of service projects and programs, social awareness, friendship and leadership skills.

The turkey is a large species of bird in the genus Meleagris, native to North America.There are two extant turkey species: the wild turkey (M. gallopavo) of eastern and central North America and the ocellated turkey (M. ocellata) of the Yucatán Peninsula in Mexico. This photograph, taken at Deer Island Preserve in Novato, California, depicts a male Rio Grande wild turkey (M. g. …

In physics, the fine-structure constant, also known as the Sommerfeld constant, commonly denoted by α (the Greek letter alpha), is a fundamental physical constant which quantifies the strength of the electromagnetic interaction between elementary charged particles.. It is a dimensionless quantity, independent of the system of units used, which is related to the …

H-alpha (Hα) is a specific deep-red visible spectral line in the Balmer series with a wavelength of 656.28 nm in air and 656.46 nm in vacuum; it occurs when a hydrogen electron falls from its third to second lowest energy level. H-alpha light is the brightest hydrogen line in the visible spectral range. It is important to astronomers as it is emitted by many emission nebulae and can be …

Carbon (from Latin carbo 'coal') is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—its atom making four electrons available to form covalent chemical bonds.It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust. Three isotopes occur naturally, 12 C and 13 C being stable, while 14 C is a …