title: [Effect of the qualitative characteristics of food products undergoing heat treatment in soybean oil on its tocopherol content].
abstract: Non-refined soybean oil was heated for 4 hours at 180 degrees C together with moistened starch or casein. The total tocopherol and individual isomers were determined. Under experimental conditions described there was a considerable loss of tocopherols (49% of the initial amount). The loss of alpha-isomer is regarded to be the most essential from the physiological standpoint. Introduction of carbohydrates (e.g. starch) to the heated oil maked the tocopherol content descend 39.4%, whereas that of proteins (e.g. casein) resulted in a 34.6%-decrease. The product heated in the oil had a selective action on the isomeric composition of tocopherols. Starch heating resulted in a decrease of gamma-isomer losses, casein heating produced the same effect. However, alpha-isomer losses increased. The data obtained indicate the necessity of discounting tocopherol losses on thermal treatment while appraising different culinary dishes and products as vitamin E source in nutrition.
mesh_terms: D005524:Food Technology; D006358:Hot Temperature; D009821:Oils / Q000032:analysis*; D013025:Glycine max / Q000032:analysis*; D013997:Time Factors; D014810:Vitamin E / Q000032:analysis*
chemical_list: D009821:Oils; D014810:Vitamin E
vernacular_title: Vliianie kachestvennykh osobennosteĭ pishchevykh produktov, podvergaiushchikh termicheskoĭ obrabotke v soevom masle, na soderzhanie v nem tokoferolov.