论摔跤抱腿技术的特点及其运用

抱腿技术是自由式摔跤运动中的一种主要技术。本文根据实践经验论述了摔跤抱腿技术的特点及其在实战中的运用。     

壳聚糖研究进展

近年对壳聚糖的研究表明．它在抗癌、预防癌细胞转移、抗辐射、吸附重金属离子、提高机体免疫功能、降低胆固醇(TC)和甘油三酯(TG)等方面发挥着巨大的作用，故被广泛用来治疗糖尿病、高血压、心脑血管等疾病，被誉为人类第六生命要素，是一种可以开发的新型运动保健品。本就近年来壳聚糖研究进展做一综述。     

不同负荷训练对大鼠骨骼肌细胞膜自由基代谢、膜流动性及Na~+-K~+-ATP酶活性的影响

探讨不同负荷游泳训练对大鼠骨骼肌细胞膜结构和功能的影响。分别测试不同负荷下膜的抗氧化酶SOD、膜脂质过氧化产物MDA、膜荧光偏振度(P)及膜Na+-K+-ATP酶活性的变化。与对照组相比,小负荷训练组骨骼肌细胞膜P值降低,膜SOD活性、Na+-K+-ATP酶活性提高,膜上MDA含量则降低;大负荷训练组较小负荷组肌膜P值增加,膜SOD活性、Na+-K+-ATP酶活性下降。适宜负荷训练可以提高骨骼肌细胞膜的抗氧化能力,改善膜脂的流动性,使膜Na+-K+-ATP酶活性增强,而过大负荷训练则使骨骼肌细胞膜的抗氧化能力、膜脂的流动性及膜酶活性降低。     

牛磺酸消除运动性疲劳的研究进展

根据牛磺酸的生物合成与代谢等特点及其在自由基代谢和运动性疲劳中的作用,阐述了额外补充牛磺酸对运动效果的影响及其机理,并论述了大强度运动中补充牛磺酸对运动能力影响的作用机制,笔者对相关的研究进展进行了系统综述。     

芦丁和维生素C对大鼠力竭运动后自由基代谢的影响

观察了芦丁和维生素 C对大鼠力竭运动后脂质过氧化水平 (L PO) ,超氧化物歧化酶 (SOD)和谷胱甘肽过氧化物酶 (GSH— Px)活性的影响。结果显示 :芦丁和维生素 C可降低大鼠力竭运动后脂质过氧化水平 ,提高大鼠力竭运动后超氧化物歧化酶和谷胱甘肽过氧化物酶的活性。此结果说明 :芦丁和维生素 C可减少力竭运动后因脂质过氧化而产生的自由基 ,提高机体抵抗运动性疲劳的能力 ,并对防止运动损伤也有一定的作用。     

原花青素对大鼠力竭运动后不同时相肾脏自由基代谢的影响

目的:探讨原花青素对大鼠力竭运动造成的肾损伤的保护作用.方法:通过建立一次性力竭游泳运动的模型,检测对照组、给药组运动后即刻、运动后 2h、运动后 6h肾组织中SOD、T—AOC活性、MDA含量,运动力竭时间;分析比较给药组和对照组肾脏各指标变化以及运动后的恢复情况.结果:(1)给药组游泳的时间延长,显著高于对照组.(2)2组运动后即刻SOD活性显著升高.给药组运动后2h和运动后6h显著高于对照组.(3)2组运动后即刻MDA有所增加,运动后2h达到最高,给药组各时相升高幅度均低于对照组,其中运动后2h和6h具有显著性差异.(4)运动给药组能长时间将T-AOC维持在较高水平.结论:(1)原花青素可以延缓运动疲劳的出现,提高大鼠游泳运动的能力.(2)原花青素能提高肾脏的抗氧化能力,对肾脏有一定的保护作用.     

Evaluation of Oxidative Stress and hsCRP in Polycystic Ovarian Syndrome in a Tertiary Care Hospital

PCOS is a heterogeneous endocrine disorder with diverse clinical presentation. Oxidative stress plays a key role in the pathophysiology of this disease. Serumhigh sensitive C-reactive protein (hsCRP), a marker of chronic low grade inflammation, is indicative of future development of cardiovascular disease. Our aim is to evaluate the oxidant status and hsCRP levels in PCOS. The study involved 61 cases and 61 controls in the age group of 18–40 years diagnosed with PCOS. Erythrocyte malondialdehyde (MDA), superoxide dismutase (SOD), serum hsCRP, gonadotrophins, thyroid stimulating hormone, prolactin, glycemic status and lipid profile were estimated. Erythrocyte MDA (p < 0.001), SOD (p = 0.007) and serum hsCRP (p < 0.001) were significantly elevated in PCOS patients than controls. Oxidative stress is present in women with PCOS along with elevated hsCRP.     

Filling the Information Gap: Radio Free Europe–Radio Liberty and the Politics of Accreditation at the 1984 Los Angeles Olympic Games

Due to the decision of the Soviet Union and nearly all of its East European satellites to withdraw from the 1984 Los Angeles Summer Games, the communist media provided audiences in the Soviet bloc with few reports on the sporting events in the Olympic city. When Radio Free Europe and Radio Liberty, broadcasters funded by the US government, attempted to fill this ‘information gap’ by beaming coverage of the Los Angeles Games behind the Iron Curtain, the Soviet Union protested to the International Olympic Committee. They claimed, with a mixture of fact and fiction, that the Radios were tools of the American intelligence establishment and accused them of broadcasting ‘subversive’ propaganda to Eastern Europe and the USSR. Stirred into action by this Soviet manoeuvre, leading spokesmen for the Radios were joined by government officials, private citizens, US Olympic Committee members and the American media in a concerted attempt not only to defend the work of the broadcasters, but also to secure their press accreditation for Los Angeles.     

3种茶抗氧化性的研究

采用钴离子和过氧化氢反应产生羟基自由基,羟基自由基和苯甲酸反应后用荧光分光光度法测定加入茶叶时荧光强度改变量,从而建立了一种用荧光法测定茶叶对羟基自由基的清除率的方法。且通过改善荧光强度的条件试验,采用荧光分光光度法测定茶叶对羟基自由基的清除率,对比分析得出3种茶的抗氧化性大小。