共查询到20条相似文献,搜索用时 125 毫秒
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目的:本文旨在观察补充月季花色素对递增负荷训练大鼠骨骼肌抗氧化能力的影响.方法:雄性sD大鼠40只随机分为安静对照组(CG)、运动组(EG)、运动+补药组(ER);EG、ER按不同时刻又分别分为2个亚组,即运动后即刻纽、运动后48h组,每组8只.EG、ER组进行递增负荷跑台训练4周,ER组每天给予月季花色素lml/100g体重灌胃.训练结束后按组别取材,测定肌组织中MDA、SOD、T—AOC的活性.结果:EG组大鼠运动后骨骼肌中MDA的含量明显升高(P〈0.05),SOD、T—AoC的活性显著降低(P〈0.05);补充月季花色素可显著提高SOD、T—AOC的活性(P〈0.05)。降低MDA的含量(P〈0.05).结论:补充月季花色素可有效降低大鼠骨骼肌组织脂质过氧化反应,保护骨骼肌细胞的结构与功能,提高运动能力. 相似文献
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为研究锁阳煎剂对大鼠骨骼肌自由基代谢的影响,将48只雄性Wister大鼠随机分成安静对照组、运动对照组、安静给药组、运动给药组.服药组大鼠服用锁阳煎剂,7周后对大鼠进行力竭处理,测定骨骼肌超氧化物歧化酶(SOD)、总抗氧化能力(T-AOC)和丙二醛(MDA)等指标.结果显示:骨骼肌超氧化物歧化酶(SOD)和总抗氧化能力(T-AOC)的活性均有显著性升高,骨骼肌丙二醛(MDA)含量显著性降低.结论:锁阳煎剂具有保护骨骼肌免受自由基损伤及提高运动能力的功能. 相似文献
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为了研究运动疲劳和运动性蛋白尿的发生机理,30只SD大鼠随机分成4组,即对照组,运动即刻组、运动后1h组和运动后24h组,测定不同时相肾脏组织匀浆丙二醛(MDA),游离巯基和Na^ -K^ -ATPase的变化,旨在探讨力竭性运动引起的氧化应激对肾功能的影响。研究结果提示,大鼠力竭性游泳运动可导致肾组织匀浆脂质过氧化水平提高,巯基含量下降,Na^ -K^ -ATPase活性下降,进而使肾功能异常,这些可能是运动性疲劳性和运动性蛋白尿发生的重要原因之一。 相似文献
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探讨杜仲提取物(Eucommia ulmoides Oliver extract,EUOE)对大鼠运动能力的营养干预,为EUOAE在运动营养干预中的应用提供实验依据。SD雄性大鼠24只,体重180-220 g,随机分为安静对照组8只、运动训练组8只、运动+EUOE 8只。在最后一次训练后,安静对照组不进行力竭运动训练取材,运动训练组、运动+EUOAE组进行力竭运动,测定其运动至力竭的时间后取材,测定骨骼肌与抗氧化水平相关的生物化学指标。研究结果表明,EUOE可以提高运动训练大鼠骨骼肌抗氧化酶活性、ATPase活性和GSH含量,降低骨骼肌MDA含量和血清LDH、CK活性,延长大鼠跑台运动至力竭时间,具有抗疲劳作用。 相似文献
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为探讨服用蛹虫草提取液和氨基酸对小鼠运动疲劳和抗缺氧的影响,建立训练鼠实验模型,灌服小鼠蛹虫草提取液和氨基酸,测定小鼠游泳力竭、爬竿、耐缺氧时间和运动训练血乳酸水平变化.结果显示;蛹虫草提取液复合灌喂训练模型小鼠,小鼠游泳力竭和爬竿及耐缺氧时间显著地长于生理盐水对照实验组小鼠(P〈0.05).蛹虫草提取液复合组与蛹虫草提取液单独灌喂组一样,游泳训练鼠的血乳酸水平变化显著地低于对照组和氨基酸处理组(P〈0.05).蛹虫草提取液和氨基酸复合对运动小鼠抗疲劳和运动生理机能的改善有积极作用. 相似文献
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目的:探讨黄芪对大鼠运动能力和免疫功能的影响,为开发一种能够延缓运动性疲劳产生、提高运动能力、增强免疫功能的新型制剂及为全民健身和运动训练提供科学依据。方法:选取100只Wister雌性大鼠,药物为蒙古黄芪。所有数据经spss16.0统计软件包处理。结论:黄芪能够并能协同运动训练延长大鼠力竭游泳时间,促进大鼠的运动能力的提高;能够延长大鼠耐缺氧时间,提高机体抗缺氧的能力;黄芪能够提高血清中SOD活性,降低血清中MDA含量,提高机体抗氧化能力;黄芪能够增强大鼠的免疫功能。 相似文献
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研究通过建立大鼠过度训练模型,观察黄柳菇总黄酮对过度训练大鼠运动能力及抗氧化防御体系的影响.研究结果表明,黄柳菇总黄酮千预下大鼠运动时间明显长于过度训练组,且各组织中丙二醛(MDA)含量显著低于过度训练组(P〈0.05),而超氧化物岐化酶(SOD)、谷胱甘肽过氧化物酶(GSH—Px)及一氧化氮合酶(NOS)的活性则显著高于过度训练组(P〈0.05).研究认为,黄柳菇总黄酮具有提高大鼠运动能力的作用,其机制可能与黄柳菇总黄酮通过提高大鼠抗氧化能力,改善运动大鼠抗氧化防御体系有关. 相似文献
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目的:研究自发性高血压大鼠(SHR)膈肌功能的变化。方法:大鼠随机分成两组,SHR组和Wistar大鼠组,各8只,应用体外灌流大鼠膈肌条的方法,测量张力一频率曲线,疲劳指数的变化,同时测定膈肌组织中的超氧化物歧化酶(SOD)、丙二醛(MDA)、一氧化氮合酶(NOS)活性(总NOS和iN0s)和NO含量的变化。结果:与对照组相比,SHR组大鼠膈肌张力-频率曲线右移,疲劳指数下降明显(P〈0.01),组织中SOD、总NOS活性和NO含量显著降低(P〈0.01),iNOS、MDA含量显著增加(P<0.01)。结论:自发性高血压大鼠膈肌功能受到损伤。 相似文献
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目的:探讨急慢性乙醇中毒对大鼠心脏的影响机制.方法:雄性健康SD大鼠,随机分为急性和慢性对照组、急性和慢性乙醇中毒组,每组8只.酶法和比色法检测血清和心肌组织谷草转氨酶(AST)、肌酸磷酸激酶(CPK)、超氧化物歧化酶(SOD)、丙二醛(MDA)、Ca^2+-Mg^2+-ATPase和Na^2+-K^+-ATPase的含量,观察心肌微细结构的改变.结果:与对照组相比:急、慢性乙醇中毒+组心肌MDA、AST、CPK和血清AST、CPK含量升高(P〈0.05,P〈0.01),SOD含量减少(P〈0.05,P〈0.01),Na^2+-K^+-ATPase和Ca^2+-Mg^+-ATPase活性降低(P〈0.05,P〈0.01).心肌组织HE染色显示,乙醇中毒组大鼠心肌细胞肿胀、细胞界限模糊不清,慢性组尤为明显.结论:急慢性乙醇中毒通过对大鼠心肌酶和氧自由基的影响而对心脏产生抑制作用. 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献