Ascorbic Acid and Ascorbyl Palmitate as Synergistic Antioxidants for Methyl Linoleate in the Presence of Water.
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منابع مشابه
Ascorbic acid and copper in linoleate oxidation. 11. Ascorbic acid and copper as oxidation catalysts
Both ascorbic acid and copper were strong prooxidants in the oxidation of linoleate in a buffered (pH 7.0) aqueous dispersion at 37OC. Minimum concentrations at which catalytic activity was detected were 1.3 X 10-7 M for coppcr and 1.8 X 10-6 M for ascorbic acid. For concentrations up to lop3 M, the increase in rate of oxidation with increase in concentration of catalyst was greater for ascorbi...
متن کاملAscorbic acid and copper in linoleate oxidation. II. Ascorbic acid and copper as oxidation catalysts.
Both ascorbic acid and copper were strong prooxidants in the oxidation of linoleate in a buffered (pH 7.0) aqueous dispersion at 37 degrees C. Minimum concentrations at which catalytic activity was detected were 1.3 x 10(-7) m for copper and 1.8 x 10(-6) m for ascorbic acid. For concentrations up to 10(-3) m, the increase in rate of oxidation with increase in concentration of catalyst was great...
متن کاملAscorbic acid and copper in linoleate
The UV absorption method and the thiobarbituric acid (TBA) test for oxidation of an aqueous suspension of linoleate were compared. The absorption method depends on the formation of hydroperoxides having conjugated double bonds that absorb strongly at 233 nm. The absorption at 233 nm increased markedly during oxidation of linoleate catalyzed by either ascorbic acid or cupric ions. The concentrat...
متن کاملAscorbic acid and copper in linoleate
The UV absorption method and the thiobarbituric acid (TBA) test for oxidation of an aqueous suspension of linoleate were compared. The absorption method depends on the formation of hydroperoxides having conjugated double bonds that absorb strongly at 233 nm. The absorption at 233 nm increased markedly during oxidation of linoleate catalyzed by either ascorbic acid or cupric ions. The concentrat...
متن کاملUsefulness of Urea as a Means of Improving the Solubility of Poorly Water-Soluble Ascorbyl Palmitate
The aim of this study was to evaluate complexes of L-ascorbyl palmitate (ASCP) and urea (UR). This evaluation involved differential scanning calorimetry (DSC), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), near-infrared spectroscopy (NIR), a solubility test, a 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging test, and a mushroom tyrosinase inhibition assay. Physico...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1954
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.08-1646