a.1.Of or pertaining to, or derived from, a plant of the genus Croton, or from croton oil.
Crotonic acid
(Chem.) a white crystalline organic acid, C3H5.CO2H, of the ethylene, or acrylic acid series. It was so named because formerly supposed to exist in croton oil. Also, any acid metameric with crotonic acid proper.
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Then the mixture were centrifuged (10,000 rpm for 10 min) and 1,000 [micro]L of the supernatant was added with 200 [micro]L of crotonic acid (internal standard).
Absorbance of the resultant solution was measured at 235nm using (Schimadzu UV- 1601, Japan) with crotonic acid as a standard.
High performance liquid chromatography analysis revealed that the retention time of crotonic acid (by-product) obtained from digested PHA was approximately 24.
P(NIPAAm-co-AAm) and p(NIPAAm-co-AAm)/XA hydrogels that contain crotonic acid (CA) exhibit a lover critical solution temperature (LCST) at 28[degrees]C, whereas p(NIPAAm-ce;-AAm)/IA, and P(NIPAAm-co-AAm)/ACA hydrogels exhibit a lover critical solution temperature at 30.
3 by addition of crotonic acid to simulate the initial acidic reaction conditions in the absence of C[O.
The company is also working on chemical production steps, including extraction of the PHB using solvents, and a thermal method of converting the PHB into a chemical called crotonic acid, which can be used as a feedstock for polymers.
The formula also comprises at least one aqueous dispersion of particles of a polymer obtained by polymerization or copolymerization of monomers selected from the group consisting of styrene, vinyl acetate, urethanes, acrylic acid, methacrylic acid, and crotonic acid; at least one acrylamide/sodium 2-methyl-2-[(1-oxo-2-propenyl) amino]-1-propanesulfonate copolymer polyelectrolyte, which is different from the polymer in aqueous dispersion; at least one surfactant with an HLB of greater than or equal to 6.
5 g of each sample was extracted in ethanol containing the para-bromophenacyl ester of crotonic acid as an internal standard and analyzed by high-performance liquid chromatography according to the methods of Daniels and Russell (2007).
The second monomer unit is selected from the group consisting of C1-3 alkyl esters of acrylic acid, methacrylic acid and crotonic acid.
The complexes formation of divalent metal ions M(II) {M= Pb, Cd and Hg} with a new copolymer based on acrylic and crotonic acids was investigated in aqueous media with NaN[O.