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- W2316710367 abstract "To examine the relation between the structure of o-dihydroxyphenyi-alkanoic acid and their antioxygenic property, caffeic and dihydrocaffeic esters were synthesized and their effectiveness for stabilizing vitamin A in cod-liver oil was determined using the Beckman spectrophotometer. As the standard antioxidant ethyl gallate was added to liver oil in concentration of 0.05% and other compounds to be tested were incorporated with it on an equivalent molecular basis. The liver oil was shaken on a rotary shaker (190_??_200 r. /min) at 24° The stability value of the control (i, e., the time in days for 500 loss of vitamin A in the absence of antioxidants) was 11 days. The stability value of ethyl protocatechuate was 13 days, but introduction of C=C dcuble bond between phenyl and carbonyl groups as in caffeic esters led to marked enhancement in effectiveness to 32 days. Moreover, hyurogenation of the double bond as in dihydrocaffeic esters increased activity to 35 days but activity of these compounds was inferior to that of ethyl gallate (stability value, 46 days)." @default.
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- W2316710367 date "1952-01-01" @default.
- W2316710367 modified "2023-09-26" @default.
- W2316710367 title "Studies on the Inhibition of the Autoxidation of Fats and Oils" @default.
- W2316710367 doi "https://doi.org/10.1271/nogeikagaku1924.26.410" @default.
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