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Reactions of Oxidized Lipids with Protein. Part XII. Interactions of Polar Groups of Lipids with Nonlipidic Substances

✍ Scribed by Pokorný, J. ;Kocourek, V. ;Zajíc, J.


Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
444 KB
Volume
20
Category
Article
ISSN
0027-769X

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✦ Synopsis


Abstract

Contrary to fresh lipids, oxidized lipids form chloroform‐insoluble, but methanol‐soluble compounds with cellulose. The amount of chloroform‐insoluble lipids is significantly higher in mixtures containing cellulose impregnated with albumin. Polar groups of oxidized lipids formed nonextractable compounds with protein more readily than polar groups of a mono‐glyceride. Compounds insoluble either in chloroform and in chloroform‐methanol or methanol were formed in contact of oxidized lipids with protein, contrary to mixtures of lipids with sole cellulose. The formation of these nonextractable compounds is due both to the interaction of protein with hydroperoxides and with non‐peroxidic oxidation products.


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## Abstract Phospholipids are oxidized at 25 °C and at 60 °C under the formation of brown pigments significantly more rapidly in mixtures with cellulose than in mixtures with casein of egg albumin. The extent of browning and the difference of reactivities are more pronounced in case of phosphatidyl