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Polyacrylonitrile (PAN) is a synthetic, semicrystalline organic polymer resin, with the linear formula (CH 2 CHCN) n. [2] Almost all PAN resins are copolymers with acrylonitrile as the main monomer.
The systematic name of this enzyme class is 5,10-methylenetetrahydrofolate:3-methyl-2-oxobutanoate hydroxymethyltransferase. Other names in common use include alpha-ketoisovalerate hydroxymethyltransferase , dehydropantoate hydroxymethyltransferase , ketopantoate hydroxymethyltransferase , oxopantoate hydroxymethyltransferase , 5,10-methylene ...
Much of chemistry research is focused on the synthesis and characterization of beneficial products, as well as the detection and removal of undesirable products. Synthetic chemists can be subdivided into research chemists who design new chemicals and pioneer new methods for synthesizing chemicals, as well as process chemists who scale up chemical production and make it safer, more ...
22395-91-1 AlCl 2<F: aluminium chloride fluoride: 22395-91-1 AlClO: aluminium chloride oxide: 13596-11-7 AlCl 2 H: dichloroalumane: 16603-84-2 AlCl 3: aluminium chloride: 16603-84-2 AlCl 2 F: aluminium chloride fluoride: 13497-96-6 AlCl 3: aluminium trichloride: 7446-70-0 AlCl 4 Cs: aluminium caesium tetrachloride: 17992-03-9 AlCl 4 K ...
In organic chemistry, peroxyacyl nitrates (also known as Acyl peroxy nitrates, APN or PANs) are powerful respiratory and eye irritants present in photochemical smog. They are nitrates produced in the thermal equilibrium between organic peroxy radicals by the gas -phase oxidation of a variety of volatile organic compounds (VOCs), or by aldehydes ...
Quantum chemistry: Douglas Hartree and Vladimir Fock: Hasegawa–Mima equation: Plasma physics: Akira Hasegawa and Kunioki Mima: Hazen–Williams equation: Hydraulics, Irrigation: Hazen and Williams Helmholtz equation: Electromagnetic radiation, Seismology, Acoustics: Hermann von Helmholtz: Henderson–Hasselbalch equation: Chemistry
The natural concentration of PAN in the atmosphere is below 0.1 μg/m 3. Measurements in German cities showed values up to 25 μg/m 3. Peak values above 200 μg/m 3 have been measured in Los Angeles in the second half of the 20th century (1 ppm of PAN corresponds to 4370 μg/m 3). Due to the complexity of the measurement setup, only sporadic ...
1 Physical chemistry problems. 2 Organic chemistry problems. 3 Inorganic chemistry problems. ... [11] Can artificial photosynthesis make any common fuels? [12]
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