9-Octadecenoic acid, 12-hydroxy-, (9Z,12R)-, homopolymer, is a complex chemical compound, often found in the manufacturing industry where it is used for varying purposes due to its polymeric characteristics. 9-Octadecenoic acid, 12-hydroxy-, (9Z,12R)-, homopolymer comes from the homopolymer category and contains repeating 9-Octadecenoic acid and 12-hydroxy- units. It possesses double bonds in its structure with Z (cis) configuration at the 9th position and R (rectus) configuration at the 12th position of the hydroxyl group. The specific usage and properties of this chemical can be diverse, often determined by the implementation technique, molecular weight, and the presence of other components in its structure.
Check Digit Verification of cas no
The CAS Registry Mumber 27925-02-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,9,2 and 5 respectively; the second part has 2 digits, 0 and 2 respectively. Calculate Digit Verification of CAS Registry Number 27925-02: (7*2)+(6*7)+(5*9)+(4*2)+(3*5)+(2*0)+(1*2)=126 126 % 10 = 6 So 27925-02-6 is a valid CAS Registry Number.
Characterization of hydroxy fatty acid dehydrogenase involved in polyunsaturated fatty acid saturation metabolism in Lactobacillus plantarum AKU 1009a
Takeuchi, Michiki,Kishino, Shigenobu,Park, Si-Bum,Kitamura, Nahoko,Ogawa, Jun
, p. 7 - 12 (2015/05/13)
Hydroxy fatty acid dehydrogenase, which is involved in polyunsaturated fatty acid saturation metabolism in Lactobacillus plantarum AKU 1009a, was cloned, expressed, purified, and characterized. The enzyme preferentially catalyzed NADH-dependent hydrogenation of oxo fatty acids over NAD+-dependent dehydrogenation of hydroxy fatty acids. In the dehydrogenation reaction, fatty acids with an internal hydroxy group such as 10-hydroxy-cis-12-octadecenoic acid, 12-hydroxy-cis-9-octadecenoic acid, and 13-hydroxy-cis-9-octadecenoic acid served as better substrates than those with α- or β-hydroxy groups such as 3-hydroxyoctadecanoic acid or 2-hydroxyeicosanoic acid. The apparent Km value for 10-hydroxy-cis-12-octadecenoic acid (HYA) was estimated to be 38 μM with a kcat of 7.6 × 10-3 s-1. The apparent Km value for 10-oxo-cis-12-octadecenoic acid (KetoA) was estimated to be 1.8 μM with a kcat of 5.7 × 10-1 s-1. In the hydrogenation reaction of KetoA, both (R)- and (S)-HYA were generated, indicating that the enzyme has low stereoselectivity. This is the first report of a dehydrogenase with a preference for fatty acids with an internal hydroxy group.
Synthesis of (S)-ricinoleic acid and its methyl ester with the participation of ionic liquid
(R)-Ricinoleic acid methyl ester obtained from commercial castor oil was transformed in a three-step procedure into its S-enantiomer in overall 36% yield using ionic liquid (1-butyl-3-methylimidazolium acetate) in the key step process. The developed procedure provides easy access to (S)-ricinoleic acid and its methyl ester of over 95% enantiomeric excess. Optical rotations of the newly obtained compounds as well as their chromatographic and spectral characteristics are provided and discussed in the context of enantiopurity both of the substrate material and the final products.
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