Changes in the tocopherol and unsaturated fatty acid constituents of spices after pasteurization with superheated steam.

Marero, Lydia M.; Homma, Seiichi; Aida, Ko; Fujimaki, Masao

doi:10.3177/jnsv.32.131

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…Demo et al (1998) measured 1328 ppm a-tocopherol in dry leaves, and it has been reported that this level may increase during winter (Gó mez-Coronado and Barbas, 2003). Conversely, the low value (12.6 mg/100 g fresh leaves) obtained by Marero et al (1986) was probably due to the analytical tools used, or to the stage development and sampling period. The accumulation of atocopherol during the vegetation period in tree leaves, especially in sun leaves, has been reported by many studies (Chrost et al, 1999;Munne-Bosch and Alegre, 2002).…”

Section: Tocopherols Contents In L Nobilis Vegetative Organsmentioning

confidence: 58%

The effects of extraction method on the measured tocopherol level and antioxidant activity of L. nobilis vegetative organs

Ouchikh¹,

Chahed²,

Ksouri

et al. 2011

Journal of Food Composition and Analysis

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Section: Tocopherols Contents In L Nobilis Vegetative Organsmentioning

confidence: 58%

The effects of extraction method on the measured tocopherol level and antioxidant activity of L. nobilis vegetative organs

Ouchikh¹,

Chahed²,

Ksouri

et al. 2011

Journal of Food Composition and Analysis

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“…Ranges were from 30.8 to 272.8 mg of R-tocopherol/100 g of fresh leaves and from 0.3 to 2.1 mg of γ-tocopherol/100 g of fresh leaves. The value obtained for R-tocopherol in bay is considerably higher than the value obtained by Marero et al, which was 12.6 mg of R-tocopherol/100 g of fresh leaves (14), probably because analytical tools have improved. On the other hand, the high values obtained by Demo et al (15) in a hexanic extract by HPLC with UV detection seem to be related with the possible overlapping of chlorophyll with R-tocopherol in such conditions.…”

Section: Resultsmentioning

confidence: 78%

Optimized and Validated HPLC Method for α- and γ-Tocopherol Measurement in Laurus nobilis Leaves. New Data on Tocopherol Content

Gómez-Coronado

Barbas

2003

J. Agric. Food Chem.

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Extraction and chromatographic conditions for measuring tocopherols from Laurus nobilis were optimized. Newly harvested leaves were dried in a microwave oven and crushed; then, alpha- and gamma-tocopherol and tocol, added as internal standard, were directly extracted from portions of ground material with acetone, by probe sonication. After centrifugation and filtration, the acetonic extract was directly analyzed by HPLC using a gradient elution with a Discovery C18 column (25 x 0.46 cm) at 35 degrees C. UV and fluorescence detections were employed simultaneously. Validation parameters of the method for linearity, accuracy, and precision can be considered to be adequate for both detection modes. After validation, a number of samples selected from different geographical areas in the Iberian peninsula were measured, and results compared with those in the literature gave surprisingly high values.

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“…Coriander from Malaysia revealed higher α-tocopherol levels (53 mg/100 g dw; data calculated from fresh weight (fw) and moisture content available), but lower δ-tocopherol (0.1 mg/100 g dw) and γ-tocopherols (0.7 mg/100 g dw) levels [1]. Otherwise, Marero et al [16] reported almost no tocopherols in coriander. Tocopherols inhibit lipid peroxidation processes of polyunsaturated fatty acids and other compounds in cell membranes, mainly due to their lipid soluble antioxidant properties [15].…”

Section: Resultsmentioning

confidence: 93%

“…The pH of the culture medium was adjusted to 5.7 before autoclaving. The culture conditions were T min [16][17][18][19]°C, T max [23-26]°C, photoperiod of 16/8 h (light/dark) supplied by light-bulbs Silvana day light (Phillips, Amsterdam, Netherlands). After five weeks, the shoots were excised from the young plants and inoculated in a modified culture medium, MS with 0.1 mg/l IBA and 0.1 mg/l BAP, pH 5.5.…”

Section: Plant Materialsmentioning

confidence: 99%

Comparative Study of Lipophilic and Hydrophilic Antioxidants from In vivo and In vitro Grown Coriandrum sativum

Días

Barros

Sousa

et al. 2011

Plant Foods Hum Nutr

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Coriander is commonly used for medicinal purposes, food applications, cosmetics and perfumes. Herein, the production of antioxidants in vegetative parts (leaves and stems) of in vivo and in vitro grown samples was compared. In vitro samples were clone A- with notorious purple pigmentation in stems and leaves and clone B- green. Seeds were also studied as they are used to obtain in vivo and in vitro vegetative parts. Lipophilic (tocopherols, carotenoids and chlorophylls) and hydrophilic (sugars, ascorbic acid, phenolics, flavonols and anthocyanins) compounds were quantified. The antioxidant activity was evaluated by radical scavenging activity, reducing power and lipid peroxidation inhibition. The in vivo sample showed the highest antioxidant activity mainly due to its highest levels of hydrophilic compounds. Otherwise, in vitro samples, mainly clone A, gave the highest concentration in lipophilic compounds but a different profile when compared to the in vivo sample. Clones A and B revealed a lack of β-carotene, β- and δ-tocopherols, a decrease in α-tocopherol, and an increase in γ-tocopherol and clorophylls in comparison to the in vivo sample. In vitro culture might be useful to explore the plants potentialities for industrial applications, controlling environmental conditions to produce higher amounts of some bioactive products.

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Changes in the tocopherol and unsaturated fatty acid constituents of spices after pasteurization with superheated steam.

Cited by 9 publications

References 5 publications

The effects of extraction method on the measured tocopherol level and antioxidant activity of L. nobilis vegetative organs

The effects of extraction method on the measured tocopherol level and antioxidant activity of L. nobilis vegetative organs

Optimized and Validated HPLC Method for α- and γ-Tocopherol Measurement in Laurus nobilis Leaves. New Data on Tocopherol Content

Comparative Study of Lipophilic and Hydrophilic Antioxidants from In vivo and In vitro Grown Coriandrum sativum

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