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- W2086943625 abstract "Cholesterol oxidation in lard containing two levels of added cholesterol was monitored using capillary gaschromatography. Loss of cholesterol and formation of cholesterol oxidation products (COPs) were measured. Lard samples with 10 times (Test I) and 2 times (Test II) the amount of cholesterol originally found in each batch of lard were heated at 180°C for 10 hr a day for 240 and 160 hr, respectively. Cholesterol steadily decreased throughout the heating period in both tests. Cholesterol loss followed a first-order reaction rate, with a rate constant (k) of −1.18×10−3 h−1 for Test I and −9.45×10−3 h−1 for Test II. The COPs accumulated during both heating tests. But the amount of COPs formed did not total the amount of cholesterol lost. During heating, thermal degradation of cholesterol likely occurred, and those products were not detected. During cooling, hydroperoxides formed, which further oxidized into the COPs that were detected. The 7-ketocholesterol and 5α,6α-epoxycholesterol were the predominant COPs formed. The isomeric 7α-and 7β-hydroxycholesterols also accumulated in the heating tests. The 3β,5α,6β-cholestantriol was found in very small amounts and the 25-hydroxycholesterol was not detected." @default.
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- W2086943625 date "1990-12-01" @default.
- W2086943625 modified "2023-09-26" @default.
- W2086943625 title "Cholesterol oxidation in heated lard enriched with two levels of cholesterol" @default.
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- W2086943625 doi "https://doi.org/10.1007/bf02541850" @default.
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