Seed lipids of <i>Sesamum indicum</i> and related wild species in Sudan. The sterols

Kamal‐Eldin, Afaf; Appelqvist, L. Å.; Yousif, G.; Iskander, George M.

doi:10.1002/jsfa.2740590309

Cited by 63 publications

(46 citation statements)

References 8 publications

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“…Small proportions of cholesterol (0.15 %), clerosterol (1.31% ), ⌬-5,24, stigmastadienol (0.78%), ⌬-7-stigmastadienol (0.40%) and avenasterol were also identified. Oils from the four varieties and from different regions (Menemen, Antalya) were similar in their desmethylsterol composition and in agreement with those previously obtaned ( Kochhar 1983;Kamal-Eldin et al 1992).…”

Section: Resultssupporting

confidence: 87%

Proximate composition of Turkish sesame seeds and characterization of their oils

Ünal¹,

Yalçın²

2008

Grasas y Aceites

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RESUMEN Composición de semillas de sésamo de Turquía y caracterización de sus aceites.Se ha evaluado la composición proximal de cuatro variedades de semillas de sésamo de Turquía así como el aceite obtenido mediante extracción en frío con hexano (composición en ácidos grasos, triglicéridos y esteroles). Las composiciones medias de las semillas fueron similares para todas las muestras siendo los valores medios 4,40%, 4,41%, 21,00%, 54,26% para humedad, cenizas, proteínas y aceite, respectivamente. Los ácidos oleico y linoleico fueron los ácidos grasos mayoritarios mientras los ácidos palmítico y estearico fueron los principales ácidos saturados. Los triglicéridos mayoritarios, determinados mediante HPLC fueron LOL; LOO; PLO; LLL y OOO, suponiendo un 62,45% del porcentaje total de los triglicéridos. Los esteroles mayoritarios fueron β-sitosterol, campesterol, estigmasterol, y ⌬-5, avenasterol, identificándose también pequeñas cantidades de colesterol, clerosterol 5,24 estigmastedienol, ⌬-7 estigmastenol y avenasterol. PALABRAS -CLAVE: Aceite de sesamo -Acidos grasos -Esteroles -Semillas de sésamo turcas -Triglicéridos. SUMMARY Proximate composition of Turkish sesame seeds and characterization of their oils.A proximate composition of four varieties of Turkish sesame seeds (moisture, ash, protein, oil) was determined along with a characterization of their oils (fatty acids, triacylglycerols and desmethylsterols) The results of the proximate analysis showed the following contents: moisture, 4,40%; ash, 4,41%; protein, 21,00%; and oil, 54,26%. Oleic and linoleic acids were the major unsaturated fatty acids while palmitic and stearic were the main saturated. The triacylglycerol composition of the sesame oil samples was determined by HPLC and LOL; LOO; PLO; LLL; OOO were the major triglycerides while triacylglycerols containing oleic and linoleic acyl residues comprize 62,45% of the total. The major desmethyl sterols found in sesame seed oils were β-sitosterol, campasterol, stigma-sterol, and ⌬-5, avenasterol. Small proportions of cholesterol, clerosterol 5,24 stigmastedienol, ⌬-7, stigmastenol and avenasterol were also identified.

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Section: Resultssupporting

confidence: 87%

Proximate composition of Turkish sesame seeds and characterization of their oils

Ünal¹,

Yalçın²

2008

Grasas y Aceites

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“…The induced hydrocarbons could be predicted from the effect of γ-irradiation on the major constituents of the fatty acids of sesame; oleic 18:1 and linoleic 18:2 which comprise 44.5 and 40.6% and may be from sterol compounds at 45.5%. The detection of unsaturated hydrocarbon in irradiated sesame was previously proven (Choi and Hwang, 1997;Kamal-Eldin et al, 1992).…”

Section: Peanut Seedsmentioning

confidence: 99%

Effect of gamma radiation on the lipid profiles of soybean, peanut and sesame seed oils

Afify¹,

Rashed²,

Ebtesam³

et al. 2013

Grasas y Aceites

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RESUMENEfecto de la radiación gamma sobre el perfil lipídico de los aceites de semillas de soja, cacahuete y sésamo Semillas de soja, cacahuete y de sésamo se expusieron a diferentes dosis de radiación gamma (0,0, 0,5, 1,0, 2,0, 3,0, 5,0 y 7,5 kGy). Se determinaron los perfiles de ácidos grasos y el insaponificable de los aceites mediante cromatografía de gases y espectrometría de masas. Los resultados demostraron que las relaciones de ácidos insaturados a ácidos grasos totales saturados (TU/TS) e hidrocarburos totales a esteroles (TH/TSt) se alteró significativamente tras la irradiación. Estos cambios se observaron claramente en el aceite extraído de las semillas de sésamo irradiados, en comparación con los aceites de soja y cacahuetes irradiados. El mayor cambio en la composición de ácidos grasos fue la disminución de la cantidad de ácidos grasos insaturados (C18:1 y C18:2) en todos los casos. En contraste, los niveles de las fracciones de esteroles como colesterol, campesterol, estigmasterol y β-sitosterol de las semillas irradiadas fueron en general más bajo que el de las semillas sin irradiados. PALABRAS CLAVE: Ácidos grasos -Esteroles -Hidrocarburos -Irradiación Gamma -Semillas oleaginosas. SUMMARY Effect of gamma radiation on the lipid profiles of soybean, peanut and sesame seed oilsSeeds of soybean, peanut, and sesame were exposed to various doses of gamma irradiation (0.0, 0.5, 1.0, 2.0, 3.0, 5.0 and 7.5 kGy). Fatty acid and unsaponifiable profiles of the extracted oils were separated by gas chromatography mass spectroscopy. The results demonstrated that the ratios of unsaturated to saturated total fatty acids (TU/TS) and total hydrocarbons to sterols (TH/TSt) were significantly altered upon irradiation. These changes were clearly observed in the oil extracted from irradiated sesame seeds compared with the oils from irradiated peanuts and soybean. The major change in fatty acid composition was the decrease in the quantity of unsaturated fatty acids (C18:1 and C18:2) in all cases. In contrast, the sterol fractions such as cholesterol, campesterol, stigmasterol and β-sitosterol levels of irradiated seeds were generally lower than that of the un-irradiated seeds.

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“…Identification of metabolites was based on the comparison of retention indices and mass spectra with those of reference compounds, with data from the NIST08 mass spectra library, the GOLM metabolome database (Kopka et al 2005) and literature (Xu and Godber 1999;Kamal-Eldin et al 1992). …”

Section: Identification Of Metabolitesmentioning

confidence: 99%

Impact of induced drought stress on the metabolite profiles of barley grain

et al. 2014

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The aim of the study was to investigate the impact of drought stress on the metabolite profiles of barley (Hordeum vulgare L.) grain against the background of natural variability depending on growing location and season. Six barley genotypes were field-grown (i) under normal weather conditions at two different sites and (ii) under induced drought conditions, using a Rain-Out-Shelter. Both trials were performed in three consecutive seasons (2010)(2011)(2012). Samples were subjected to a gas chromatography-mass spectrometry metabolite profiling procedure, based on the extraction and fractionation of a broad spectrum of low molecular weight metabolites ranging from lipophilic (e.g. triglyceride-derived fatty acids, free fatty acids, fatty alcohols, sterols) to hydrophilic (e.g. sugars, sugar alcohols, acids, amino acids and amines) compounds. The comparative assessment of the profiling data by means of multivariate analyses revealed that differences in lipophilic metabolites were mainly due to seasonal impact. In contrast water deficit was strongly reflected in quantitative changes of polar metabolites, irrespective of natural variability. The impact factor growing location was differently pronounced depending on the growing season. Univariate statistical analysis revealed 17 metabolites, including the monosaccharides fructose and glucose, the trisaccharide raffinose, several organic acids and the biogenic amine c-aminobutyric acid to be significantly (p-value \ 0.01) influenced by drought stress conditions.

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Seed lipids of Sesamum indicum and related wild species in Sudan. The sterols

Cited by 63 publications

References 8 publications

Proximate composition of Turkish sesame seeds and characterization of their oils

Proximate composition of Turkish sesame seeds and characterization of their oils

Effect of gamma radiation on the lipid profiles of soybean, peanut and sesame seed oils

Impact of induced drought stress on the metabolite profiles of barley grain

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