Analysis of vitamin E isomers in seeds and nuts with and without coupled hydrolysis by liquid chromatography and coulometric detection

Delgado-Zamarreño, M.M.; Bustamante-Rangel, Myriam; Sánchez-Pérez, A.; Hernández-Méndez, J.

doi:10.1016/s0021-9673(01)00991-8

Cited by 42 publications

(29 citation statements)

References 9 publications

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“…A. of analytical division, Lifescience facility, India. Alpha-tocopherol analysis was carried out according to Delgado-Zamarreño et al (2001) and vitamin A determined as β-carotene using AOAC Official Method 971.15 of spectrophotometric method. Water-soluble vitamins (B1, B2, B3 and folic acid) were measured with a RIDASCREEN enzyme immunoassay kit (R-Biopharm AG, Darmstadt, Germany) in accordance with the manufacturer’s instructions.…”

Section: Methodsmentioning

confidence: 99%

Comparative nutrient composition of selected wild edible mushrooms from two agro-ecological zones, Uganda

2015

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In Uganda, wild mushrooms are mainly collected during the rainy season and valued as a traditionally nutritious food by the rural poor. However, their nutritional attributes have not been adequately studied and documented. Comparative nutrient composition of five wild edible mushroom species was determined, namely: P. tenucuilus, T. tyleranus, T. clypeatus, V. speciosa and T. microcarpus of sub-humid and humid agro-ecological zones. Standard analytical techniques following the AOAC were used for proximate and mineral contents determinations. Vitamins determination followed the established standard protocols of the laboratories where the analyses were conducted. Combined use of nutrient concentration and scores were used to compare the level of the contents in the mushroom species. Significant differences (p < 0.05) in nutrient values were demonstrated between and among the mushroom species obtained from the two agro-ecological zones. On dry weight basis, all proximate compositions were high in mushroom species obtained from the humid zone with exception of the total carbohydrates and energy values. Irrespective of the source of the mushrooms, significant amounts were demonstrated in protein, dry matter, ash and total carbohydrates ranging between 11.56–27.42%, 82.34–99.76%, 10.79–16.87%, and 37.12–61.05%, respectively. In comparison with recommended dietary daily intakes, the K, P, Se, Mn, Cu and Fe contents were relatively high with low Ca, Mg, Zn and Na. Thiamin, folic acid, vitamin C, and niacin levels were high but below the recommended FAO references. Considering mushrooms from different agro-ecological zones, significant differences (p < 0.05) were observed in all mushroom species in P except in T. clypeatus, T. tyleranus, T. microcarpus and T. clypeatus in potassium, T. clypeatus and T. microcarpus in Mg. Mushrooms from humid agro-ecological zones had relatively high overall mineral and vitamin supply potential. In conclusion, consumption of these mushrooms should be encouraged in supplementation of the staple food of the poor people. Hence, solving malnutrition problems in children, pregnant mothers, and the immune compromised patients such as the HIV/AIDs.

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Section: Methodsmentioning

confidence: 99%

Comparative nutrient composition of selected wild edible mushrooms from two agro-ecological zones, Uganda

2015

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“…As seeds, nuts would only be required to begin metabolism during germination of the seedling, and thus would only require low levels of these compounds (Bartz & Brecht, 2002). The most abundant vitamin in the cashew nuts was vitamin E, which serves to prevent oxidation of the unsaturated fatty acids found there (Delgado-Zamarreno, Bustamante-Rangel, Sanchez-Perez, & Hernandez-Mendez, 2001). As in other nut types, γ-tocopherol was the prevalent isomer of vitamin E found in the cashews across samples.…”

Section: Vitamins and Mineralsmentioning

confidence: 99%

Nutrient Composition of Raw, Dry-Roasted, and Skin-On Cashew Nuts

Griffin

Dean

2017

JFR

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Cashew nuts are the second most popular tree nut in the US with sales growing at a rate of 7% per annum. The highest quality cashew nuts are traditionally whole, oil-roasted, and devoid of skins. The development of a technique to remove the caustic cashew nut shell liquid from cashews and leave the skins intact allows for the production of novel cashew products including skin-on or "wrapped" in addition to raw and dry roasted products. This study investigated the nutritional characteristics of these newer cashew products. These products were found to contain bioactive compounds including mono-and poly-unsaturated fatty acids, phytosterols, arginine, magnesium, tocopherols, and phenolic compounds. All the types of cashews exhibited higher levels of phytosterols than the amounts reported for other tree nuts. The skin-on cashews had higher levels of phenolic compounds compared to the other cashew varieties tested, indicating additional health benefits of consuming cashew nuts with skins.

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“…The saponified and vitamin E isomers samples were extracted as described by Delgado-Zamarreño et al (2004) with the extraction time modified to 4 h under agitation. Fifty milliliters of ethanol, 5.0 mL of a 10% (m/v) aqueous solution of ascorbic acid, 10 mL of 80% (m/v) aqueous solution of potassium hydroxide, and 25 mL of water were added to 2.000 g of ground sample and were protected from light.…”

Section: Determination Of Tocopherol Isomers and Equivalent Vitamin Ementioning

confidence: 99%

Quantification of minerals and tocopherols isomers in chestnuts approach chemometrics

et al. 2014

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The levels of the α, δ, and (β+γ)-tocopherol isomers and the amounts of the minerals Se, Zn, Ca, Fe, K, Mn, Mg, and Cu were analyzed in chestnuts. High contents of Zn (>65%) relative to the recommended dietary intake (RDI) were found in all chestnuts except macadamia nuts (25% of the RDI). All samples had Se contents higher than the RDI: Brazil nuts > macadamia nuts, cashew nuts > pecans > almonds > pistachio nuts > hazelnuts > European nuts. A greater concentration of α-tocopherol was found in almonds (30% of RDI). All samples, except for hazelnuts, almonds, and macadamia nuts, had (γ+β)-tocopherols, with the largest amount found in pistachios. Only pecan nuts and European nuts had δ-tocopherol and only in low amounts. Multivariate analysis allowed for better characterization and distinction of the chestnuts. Key words: Principal component analysis, antioxidants, selenium, zinc ResumoOs níveis dos isômeros α, δ, e (β + γ)-tocoferol e os valores dos minerais Se, Zn, Ca, Fe, K, Mn, Mg e Cu foram analisados em castanhas de oleaginosas. Teores elevados de Zn (> 65%) em relação à ingestão dietética recomendada (RDI), foram encontrados em todas as castanhas exceto na macadâmia (25% de RDI). Todas as amostras apresentaram elevados teores de Se com relação à RDI, em ordem decrescente: castanha do Brasil> macadâmia, castanha de caju> pecans> amêndoas> pistache> avelãs> nozes europeus. α-tocoferol foi encontrado em maior concentração nas amêndoas (30% de RDI). Todas as amostras, exceto para as avelãs, amêndoas e nozes de macadâmia, tinham (γ + β)-tocoferol, com destaque para a alta quantidade encontrada em pistache. δ-tocoferol em pequenas quantidades foram encontradas em nozes pecan e castanha europeia. A análise multivariada permitiu melhor caracterização e distinção das castanhas.

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Analysis of vitamin E isomers in seeds and nuts with and without coupled hydrolysis by liquid chromatography and coulometric detection

Cited by 42 publications

References 9 publications

Comparative nutrient composition of selected wild edible mushrooms from two agro-ecological zones, Uganda

Comparative nutrient composition of selected wild edible mushrooms from two agro-ecological zones, Uganda

Nutrient Composition of Raw, Dry-Roasted, and Skin-On Cashew Nuts

Quantification of minerals and tocopherols isomers in chestnuts approach chemometrics

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