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Antioxidant Protection of Edible Oils 总被引：4，自引：0，他引：4
Cheung SC Szeto YT Benzie IF 《Plant foods for human nutrition (Dordrecht, Netherlands)》2007,62(1):39-42
The ability of different cooking oils to withstand oxidation was investigated in relation to their native antioxidant capacity
[measured as the Ferric Reducing/Antioxidant Power (FRAP) value]. The antiperoxidation effect of the presence of the Chinese
herbs, du-zhong (Cortex Eucommia ulmoides) and ginseng (Panax ginseng C.A. Mayer) in corn oil was also investigated over 26 days’ storage at 55°C. Results showed that sesame oil had the highest FRAP value
(803 μM), followed by canola oil (400 μM), and sunflower, peanut, corn and olive oils (100–153 μM). Oils with higher intrinsic
antioxidant content showed higher resistance to oxidation, although this was not statistically significant. Corn oil to which
was added the herbs du-zhong, ginseng or both had increased resistance to oxidation (conjugated diene level and lipid peroxide
formation) over 26 days. FRAP values of the oil/herb mixtures decreased during this time, implying utilisation of herbal antioxidants.
Results have implications for increasing the shelf-life and usage time of cooking oils by addition of herbs which can increase
resistance of the oil to oxidation. Results have implications also for health, as it is possible that ingestion of these herbs
could increase resistance of polyunsaturated fatty acids of cell membranes and lipoproteins to oxidation within the body. 相似文献
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The objective of the present field study was to compare the fertility results for boar semen diluted in X-cell stored up to 4-5 days before artificial insemination (AI) with semen diluted in Beltsville thawing solution (BTS) used for AI following 2-3 days of storage (where the first day being the collection day). A total number of 2601 double inseminations in Norwegian herds were included in this two-trial study. All the boars used in the study were mature cross-bred Norwegian Landrace x Duroc (LD), which were routinely used for AI in Norway. The inseminated gilts and sows were Norwegian Landrace x Yorkshire (LY). The AI doses contained 2.5 billion spermatozoa, and consisted of a mixture of semen from three, occasionally four, boars (i.e. heterospermic semen). Fertility was measured in terms of the likelihood of farrowing and subsequent litter size. The fertility of the semen in both of the extenders was satisfactory and no significant differences were found either in semen stored 4-5 days in X-cell compared with 2-3 days in BTS or in semen stored 2-3 days in X-cell compared with 2-3 days in BTS. The storage capability findings for the long-term extender X-cell could significantly simplify the practical issues of semen production and the distribution of AI doses containing 2.5 billion spermatozoa. However, in pig production systems where all semen is used within 2-3 days, the short-term extender BTS is as good as the more expensive extender X-cell. 相似文献
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Szeto YT Wong JW Wong SC Pak SC Benzie IF 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(2):97-100
The genoprotective effect of American and Asian ginseng on human lymphocytic DNA was studied. Using the comet assay, aqueous
extracts of both types of ginseng were shown to diminish hydrogen peroxide-induced DNA damage. In contrast, and in accordance
with traditional Chinese medicine beliefs, addition of the juice from Chinese turnip counteracted the beneficial effect of
ginseng. Results showed that incubating ginseng along with turnip juice abolished the DNA protective effect of both American
and Asian ginseng. Although the exact mechanism has not been elucidated, the counteracting effect of turnip on ginseng seems
unlikely to be mediated by enzymatic action as the effect was seen with boiled as well as unboiled turnip extract. 相似文献
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This study aimed to compare in vitro antioxidant power of different types of tea (Camellia sinensis). The ferric reducing/antioxidant power (FRAP) assay was used to measure the total antioxidant power of freshly prepared infusions of 25 types of teas. Results showed that different teas had widely different in vitro antioxidant power and that the antioxidant capacity was strongly correlated (r = 0. 956) with the total phenolics content of the tea. Expressed as micromol of antioxidant power/g of dried tea leaves, values ranged as 132-654 micromol/g for black ("fermented") teas, 233-532 micromol/g for Oolong ("semifermented") teas, and 272-1144 micromol/g for green ("nonfermented") teas. One cup of tea of usual strength (1-2%), therefore, can provide the same potential for improving antioxidant status as around 150 mg of pure ascorbic acid (vitamin C). 相似文献
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Scientists and engineers are increasingly turning to nature for inspiration. Light weight textile fabrics suitable for summer
dress material were developed by imitating the branching structure of a plant in order to achieve high water absorption and
transportation properties. The absorption property of the fabrics was characterized by using the Moisture Management Tester
(MMT) and Transplanar Water Transport Tester (TWTT). The fabrics were analyzed using optical microscopes and Optical Contact
Angle (OCA) tester to understand the structure as well as the absorption behavior of these fabrics. The results indicated
that plant structured fabrics have a significant faster water absorption and wicking properties over conventional weave structures,
makes them highly preferable for summer-wear. 相似文献
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Sublethal effects of the insecticidal fusion protein ω‐ACTX‐Hv1a/GNA on the parasitoid Eulophus pennicornis via its host Lacanobia oleracea 
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