Factors affecting the stability of cottonseed oil. A study of the antioxygenic activity of alpha-tocopherol

Swift, C. E.; Rose, W. Gordon; Jamieson, George S.

doi:10.1007/bf02545440

Cited by 48 publications

(8 citation statements)

References 14 publications

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“…In each case, for the first 60 hours, the samples absorbed at a faster rate than did either the edible oil or the crude oil. The effect is similar to that reported by Riemenschneider, Swift, et al (30,32) using the peroxide value to study the oxidation characteristics of fractions of molecularly distilled alkali refined cottonseed oil.…”

supporting

confidence: 86%

Molecular distillation of a crude soybean oil

Detwiler¹,

Bull²,

Wheeler³

1943

Oil Soap

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supporting

confidence: 86%

Molecular distillation of a crude soybean oil

Detwiler¹,

Bull²,

Wheeler³

1943

Oil Soap

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“…It has been shown repeatedly in antioxidative tests with feedstuffs and fat that y-tocopherol is more active than a-tocopherol (Swift et al, 1942;Parkhurst et al, 1968;Chow and Draper, 1974;Juillet, 1975;Schäfer and Elmadfa, 1984;Landvogt and Elmadfa, 1986;Timmermann, 1990;Gottstein and Grosch, 1990). Thus, it seems that the biological activity is greatest for a-tocopherol, which has 3 methyl groups in the chroman ring, whereas the antioxidative activity is greatest for y-tocopherol, which has 2 methyl groups in the chroman ring.…”

Section: Introductionmentioning

confidence: 94%

The biological activity of natural source tocopherols in chickens fed fresh or oxidized fat rich in linoleic acid

Jakobsen

Engberg

Hartfiel

1993

Archiv für Tierernaehrung

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Three experiments were carried out with male broiler chickens reared from day- old to 6 weeks of age on semi-purified diets containing 10% fresh (Expt. 1 and 3) or oxidized (Expt. 2) re-esterified triglycerides with a fatty acid composition similar to that of soya bean oil containing increasing concentrations of either a mixture of d-alpha-, gamma-, delta-tocopherylacetate (d-tocopherols) of natural source or dl-alpha- tocopheryl acetate (dl-tocopherol). In Expt. 1 and 2 the mixture of d-tocopherols consisted of 35.7% d-alpha-, 45.3% d-gamma- and 19.0% d-delta-, while in Expt. 3 the distribution was 25.3% d-alpha-, 28.1% d-gamma- and 10.8% d-gamma- in 35.8% re-esterified triglycerides. The relative biopotency of d-alpha-: gamma-: delta-tocopherol was anticipated to be 100:25:1, whereas that of dl-alpha-tocopherol was 74% relative to d-alpha-tocopherol. The experiments demonstrate that the results obtained for the biological activity depend on the response parameters chosen. With respect to gain in weight, feed conversion, relative organ weight, packed cell volume (PCV), ELP (erythrocyte lipid peroxidation), plasma activities of glutamate-oxaloacetate-transaminase (GOT), creatine kinase (CK) and glutathione peroxidase (GSH-Px) and plasma Na+ concentration, the mixture of natural source tocopherols was identical to that of dl-alpha-tocopheryl acetate, although the concentration of alpha-tocopherol was only about one third of that of dl-alpha-tocopherol. Differences between natural source and synthetic tocopherols were expectedly observed with respect to plasma concentrations of alpha-, gamma-, delta-tocopherol. Differences between the two forms as to muscular dystrophy, in vitro haemolysis and potassium concentration in plasma were ambiguous. It is suggested that the function of d-alpha-, gamma-, delta-tocopherol in erythrocyte fragility and skeletal muscle structure should be compared to that of dl-alpha-tocopherol in future investigations.

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“…The nitrogen base of the phosphatidyl ethanolamine group is so weak that the hydroxyl group of the phosphoric acid remains mostly free, hence hydrogen donation is greatly facilitated. At the same time phosphoric acid is able to chelate metals (Evans et al, 1954;Swift et al, 1974;Evans et al, 1951;Cowan et al, 1962).…”

mentioning

confidence: 99%

Effect of different reversed micelles on autooxidation and photooxidation of stripped corn oil

El-Shattory¹,

Saadia²,

Hamed³

et al. 2003

Grasas y Aceites

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RESUMENEfecto de diferentes miscelas en la autooxidación y fotooxidación de aceite de maíz libre de antioxidantes.El efecto de miscelas inversas (RMs) en combinación con α-tocoferol y Trolox fue evaluado en la autooxidación y fotooxidación de aceite de maíz libre de antioxidantes. La oxidación fue seguida por la medida de la formación de hexanal e hidroperóxido. Las RMs influyeron en la estabilidad de la oxidación del aceite dependiendo del tensioactivo usado. Las RMs de lecitina causaron una mayor disminución en la oxidación que las RMs de poligliceril-3-oleato y las RMs de metilglucosa dioleato. Todas las RMs redujeron la inhibición de la oxidación cuando se añadieron en combinación con antioxidantes externos.PALABRAS-CLAVE: Aceite de maíz -Autooxidación -Fotooxidación -Lecitina -Metil glucosa dioleato -Miscelas inversas -Oxidación -Poligliceril-3-oleato. SUMMARY Effect of different reversed micelles on autooxidation and photooxidation of stripped corn oil .The effect of reversed micelles (RMs) in combination with α-tocopherol and Trolox was evaluated on the autooxidation and photooxidation of stripped corn oil. Oxidation was followed by measuring hydroperoxide and hexanal formation. RMs affected the oil oxidation stability to a degree depending on the surfactant used. Lecithin RMs caused a stronger decrease in oxidation than polyglyceryl-3-oleate RMs and methylglucose dioleate RMs. All R Ms reduced the inhibition of oxidation when added in combination with external antioxidant.

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Factors affecting the stability of cottonseed oil. A study of the antioxygenic activity of alpha-tocopherol

Cited by 48 publications

References 14 publications

Molecular distillation of a crude soybean oil

Molecular distillation of a crude soybean oil

The biological activity of natural source tocopherols in chickens fed fresh or oxidized fat rich in linoleic acid

Effect of different reversed micelles on autooxidation and photooxidation of stripped corn oil

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