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Coons

T. J. Brice, R. 1. Coon, and W. A. Severson, "Properties of Some Fluorocarbon Derivatives of Sulfur Hexafluoride," paper presented at American Chemical Society, Minneapolis, Minn., 1955. [Pg.312]

RS- P-Aminoisobutyric acid (a-methyl-P-alanine) [10569-72-9] M 103.1, m 176-178 , 178-180 , 181-182 , R -(-)- isomer [144-90-1] m 183 , [a] -21 (c 0.43, HjO), pKes,(,) 3.7, pKEst(2) 10.2. Colorless prisms from hot H O, were powdered and dried in vacuo. The purity is checked by paper chromatography (Whatman 1) using ninhydrin spray to visualise the amino acid Rp values in 95% MeOH and n-PrOH/5N HCOOH (8 2) are 0.36 and 0.50 respectively. [Kupiecki and Coon Biochem Prep 7 20 7960 Pollack J Am Chem Soc 65 1335 7943.] The R-enantiomer, isolated from iris bulbs or human urine was crystd from H2O and sublimed in vacuo [Asen et al. J Biol Chem 234 343 7959]. The RS-hydrochloride was recrystd from EtOH/Et20 m 128-129 , 130° [Bbhme et al. Chem Ber92 1258, 1260, 1261 7959]. [Pg.107]

Wasch-bdr, m. raccoon, coon, -barkeit, /. wash-ability. -beh ter, m. washing tank, -ben-zin, n. gasoline for cleaning, -benzol, n. commercial benzene for cleaning, waschbestandig, a. resistant to washing, wash-proof. [Pg.503]


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See also in sourсe #XX -- [ Pg.5 , Pg.58 ]




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