自由基与运动性疲劳     

邹荣琪  檀志宗 《内蒙古体育科技》2002,15(4):2-4

随首自由基理论引入运动医学领域之后，运动与自由基已成为人们关注的课题，此领域的研究主要集中于：运动性内源性自由基代谢，自由基与运动性疲劳，自由基与运动性肌肉损伤等。本就自由基与运动性疲劳这一问题进行简要综述。  相似文献   

不同运动方式和抗氧化剂对大鼠心肌线粒体无机离子代谢的影响     

姚俊  徐礼皙 《体育与科学》2005,26(6):65-67,59

本研究以SD大鼠为研究对象,将动物随机分为一次性运动服药及不服药组、耐力训练服药及不服药组、间歇训练服药及不服药组共六组.一次性运动组、耐力运动组和间歇运动组大鼠在最后一次运动完成后分别于运动后即刻、运动后24小时和运动后48小时处死取样,随后对心肌线粒体Mg^2＋、Fe^2＋、Mn^2＋、Cu^2＋等无机离子浓度的测定,研究不同运动方式和抗氧化剂对大鼠心肌无机离子代谢的影响,以期为运动训练提供参考.  相似文献   

叔磺酰胺抗氧剂     

俞书宏 《中外技术情报》1994,(5):32-33

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香菇具有多种保健功效     

孔昭惠 《健身科学》2008,(11):21-21

美国农业部农业研究服务中心的农学家大卫·布鲁尔通过研究发现:香菇中含有一种高分子量多聚糖(HMWP),能够提高人体的免疫功能。而另外一些研究显示:香菇中含有的另外一种化合物——香菇嘌呤(也称赤酮嘌呤)可以  相似文献   

走进添加剂世界     

《科学启蒙》2011,(Z2)

正确看待食品添加剂《中华人民共和国食品安全法》第九十九条对食品添加剂定义为:食品添加剂,指为改善食品品质和色、香、味以及为防腐、保鲜和加工  相似文献   

淫羊藿总黄酮提取工艺的研究   总被引：2，自引：0，他引：2  

陈封政  李书华 《乐山师范学院学报》2003,18(4):32-34

对淫羊藿总黄酮的提取溶剂、提取时间和抗氧化剂的量进行了研究。研究结果表明采用10倍于淫羊藿量的0．3％Na2S2O5蒸馏水，微沸提取30min为最佳条件。  相似文献   

Effects of osmotic stress on antioxidant enzymes activities in leaf discs of P<Subscript>SAG12</Subscript>-<Emphasis Type="Italic">IPT</Emphasis> modified gerbera     

Lai QX  Bao ZY  Zhu ZJ  Qian QQ  Mao BZ 《Journal of Zhejiang University. Science. B》2007,8(7):458-464

Leaf senescence is often caused by water deficit and the chimeric gene PSA612-1PT is an auto-regulated gene delaying leaf senescence. Using in vitro leaf discs culture system, the changes of contents of chlorophylls, carotenoids, soluble protein and thiobarbituric acid reactive substance （TBARS） and antioxidant enzymes activities were investigated during leaf senescence of PSA612-1PT modified gerbera induced by osmotic stress compared with the control plant （wild type）. Leaf discs were incubated in 20%, 40% （w/v） polyethylene glycol （PEG） 6 000 nutrient solution for 20 h under continuous light [ 130 μmol/（m^2·s）]. The results showed that the contents of chlorophylls, carotenoids and soluble protein were decreased by osmotic stress with the decrease being more pronounced at 40% PEG, but that, at the same PEG concentration the decrease in the transgenic plants was significantly lower than that in the control plant. The activities of superoxide dismutase （SOD）, catalases （CAT）, ascorbate peroxidase （APX）, guaiacol peroxidase （GPX） and dehydroascorbate reductase （DHAR） were stimulated by PEG treatment. However, the increases were higher in PSA612-IPT transgenic plants than in the control plants, particularly at 40% PEG treatment. Lipid peroxidation （TBARS content） was increased by PEG treatment with the increase being much lower in transgenic plant than in the control plant. It could be concluded that the increases in the activities ofantioxidant enzymes including SOD, CAT, APX, GPX and DHAR were responsible for the delay of leaf senescence induced by osmotic stress.  相似文献   

Effects of α-tocopheryl acetate supplementation in preslaughter diet on antioxidant enzyme activities and fillet quality of commercial-size Sparus macrocephalus     

Zhang XD  Wu TX  Cai LS  Zhu YF 《Journal of Zhejiang University. Science. B》2007,8(9):680-685

This study examined the effects of dietary α-tocopheryl acetate supplementation on antioxidant enzyme activities and fillet quality in commercial-size Sparus macrocephalus. Three hundred fish [main initial weight （350±12） g] were divided into three groups （E250, E500 and El000） and reared in 9 cages. The fish were fed for 8 weeks with three diets containing different levels of dietary α-tocopheryl acetate （289, 553, 1069 mg/kg）. Over the experimental period, fish were fed to satiation and reached a final mean weight of （465±28） g without significant body weight difference and proximate composition difference. Fillet α-tocopherol was significantly （P〈0.05） different between groups, reaching levels of 14.2, 22.1, 30.9 pg/mg fillet for groups E250, E500 and El000, respectively. Total serum superoxide dismutase （SOD） activity increased significantly （P〈0.05） in fish fed the diets high in α-tocopheryl acetate, but serum glutathione peroxidase （GPX） activity was unaffected. In storage on ice, fillets of fish fed the diets high in α-tocopheryl acetate exhibited significantly lower （P〈0.05） levels of oxidation. These results suggested that increased dietary α-tocopheryl acetate could increase its flesh deposition, increase the activity of SOD and prevent lipid peroxidation ofSparus macrocephalus fillets in retail storage on ice.  相似文献   

Can the Tomato Prevent Cancer?     

王建明 《新高考》2009,(3):54-55

难度:★★★★☆字数:368建议时间:5分钟Apurple tomato genetically engineered to con-tain nutrients more commonly seen in dark berries helped prevent cancer in mice,British researchers said on Sunday.The finding,published in  相似文献   

抗氧化剂补充在体育生物科学中运用方向的研究   总被引：1，自引：0，他引：1  

张新辉  熊正英 《辽宁体育科技》2007,29(5):22-24

概述了运动、自由基和抗氧化剂间的联系，总结了目前自由基生物学理论在体育生物科学中的研究运用方向以及各种抗氧化剂的补充情况。  相似文献