Effects of GLUT4 expression on insulin resistance in patients with advanced liver cirrhosis     

Shan WF  Chen BQ  Zhu SJ  Jiang L  Zhou YF 《Journal of Zhejiang University. Science. B》2011,12(8):677-682

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Sample Size Calculations for Precise Interval Estimation of the Eta-Squared Effect Size     

Gwowen Shieh 《Journal of Experimental Education》2015,83(2):203-217

Analysis of variance is one of the most frequently used statistical analyses in the behavioral, educational, and social sciences, and special attention has been paid to the selection and use of an appropriate effect size measure of association in analysis of variance. This article presents the sample size procedures for precise interval estimation of eta-squared and partial eta-squared in fixed-effects analysis of variance designs. The desired precision of a confidence interval is assessed with respect to (a) the control of expected width and (b) the tolerance probability of interval width within a designated value. In addition, sample size calculations for standardized contrasts of treatment effects and corresponding partial strength of association effect sizes are also considered.  相似文献   

肌肉运动疲劳的生物标志物研究进展     

赵海涛  曹庆雷  刘鑫  李小兰 《成都体育学院学报》2021,(2):128-135

肌肉疲劳是指在进行肌肉收缩活动期间产生的做功能力下降现象,在运动过程中很常见,也是限制运动员提高成绩的主要原因之一。肌肉疲劳产生生物标志物可以评估在运动期间肌肉的疲劳程度和运动对骨骼肌的影响。肌肉疲劳主要是由于能量物质耗尽,氧化应激增加,炎症反应激活等机制造成的。此外,还涉及了脱水、高氨血症、线粒体生物发生和遗传反应,文章通过梳理,把肌肉疲劳的生物标志物分为两类:一类是非侵入式的生物标志物,主要包括肌肉功率输出测量、电生理测量、心脏功能测量和摄氧量等;另一类是侵入式的生物标志物,主要包括ATP代谢、氧化应激和炎症等相关的生化指标。以期对以后运动疲劳的诊断和新的生物标志物的开发提供有价值的信息。  相似文献   

运动员稀氧区域训练对肌肉纤维耐久力的影响     

王刚  吴波 《科技通报》2014,(9)

目的:研究运动员稀氧区域训练对肌肉纤维耐久力的影响。方法:分析18名运动员在常氧和高原低氧(模拟海拔4500 m递增负荷运动时,低氧通气反应速率、最大摄氧量以及最大耐力持续时间三个肌肉纤维耐久力评估指标的变化情况。结果:高原低氧训练时运动员低氧通气速率和最大耐力持续时间显著高于常氧对应值,高原低氧训练时,运动员最大摄氧量低于常氧对照组。高原低氧训练组,运动员在4个不同功率等级低氧通气速率,均高于常氧对应值,低氧通气速率在50%、75%以及100%最大功率时显著高于常氧对应值,最大摄氧量在各相对功率等级中,无显著性差异。运动员的低氧通气反应速率在高原低氧训练组至75%最大功率阶段降低,在75%至100%最大功率阶段基本保持平稳上升,不同相对强度下低氧训练组运动员最大摄氧量较常氧对应值显著降低。结论:高原运动训练下运动员肌肉纤维耐久力增强,疲劳时间降低,可提高运动员的运动能力。  相似文献   

Comparison and Translation of English & Chinese Idioms     

武雯敏 《科学中国人》2014,(6):110

Till present,there are far fewer scholars fascinated by the study of English and Chinese idioms fro the angle of classification.Therefore,the paper writer plans to carry out the comparative classification study of Chinese and English idioms from three angles:grammar and vocabulary,rhetorical point of view and source of idioms,to find out the similarities and differences,studying the corresponding translation strategy.  相似文献   

Interference of medical contrast media on laboratory testing     

Giuseppe Lippi  Massimo Daves  Camilla Mattiuzzi 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2014,24(1):80-88

The use of contrast media such as organic iodine molecules and gadolinium contrast agents is commonplace in diagnostic imaging. Although there is widespread perception that side effects and drug interactions may be the leading problems caused by these compounds, various degrees of interference with some laboratory tests have been clearly demonstrated. Overall, the described interference for iodinate contrast media include inappropriate gel barrier formation in blood tubes, the appearance of abnormal peaks in capillary zone electrophoresis of serum proteins, and a positive bias in assessment of cardiac troponin I with one immunoassay. The interference for gadolinium contrast agents include negative bias in calcium assessment with ortho-cresolphthalein colorimetric assays and occasional positive bias using some Arsenazo reagents, negative bias in measurement of angiotensin converting enzyme (ACE) and zinc (colorimetric assay), as well as positive bias in creatinine (Jaffe reaction), total iron binding capacity (TIBC, ferrozine method), magnesium (calmagite reagent) and selenium (mass spectrometry) measurement. Interference has also been reported in assessment of serum indices, pulse oximetry and methaemoglobin in samples of patients receiving Patent Blue V. Under several circumstances the interference was absent from manufacturer-supplied information and limited to certain type of reagents and/or analytes, so that local verification may be advisable to establish whether or not the test in use may be biased. Since the elimination half-life of these compounds is typically lower than 2 h, blood collection after this period may be a safer alternative in patients who have received contrast media for diagnostic purposes.  相似文献   

中日局部地区老年人身体形态、素质、机能指标的对比研究     

朱珊珊  刘云发  张兴伟  李在军 《湖北体育科技》2014,(2):131-135

运用文献资料、测试、数理统计方法探讨中日老年人体质共性异性特征,分析差异原因,为中国老年人健康管理的完善提供依据。  相似文献   

增压辅助方法对大鼠骨骼肌HIF-1α表达的影响     

郝少伟  ;马福海  ;樊蓉芸  ;祁继良  ;余小燕  ;贺颖英  ;李亚楠 《辽宁体育科技》2014,(2):26-29

目的:通过高原低氧大强度训练与增压辅助方法相结合建立动物模型,探讨高原低氧大强度训练后施加增压辅助方法对大鼠骨骼肌组织HIF-1α表达的影响。方法:wistar大鼠32只随机分为4组:其中A组为自然环境下恢复,B组0.2MPa增压1h恢复,C组0.2MPa增压2h恢复,D组0.3MPa增压2h恢复。4组大鼠在西宁(2260m)经过3天适应性训练和6天正式训练。在最后一次训练结束后24h所有大鼠实施腹腔麻醉取大鼠一侧腓肠肌,运用蛋白质免疫印迹法检测各组HIF-1α蛋白表达量。结果:施加增压辅助方法干预后各恢复组大鼠骨骼肌HIF-1α蛋白表达较自然恢复组呈上升趋势,其中B组增幅较大。结论:通过1周低氧大强度训练后,施加增压辅助方法的实验发现,各增压恢复组大鼠骨骼肌HIF-1α蛋白表达上调,表明高原训练后施加增压辅助方法可能对增强机体低氧耐受能力产生影响,有利于机体运动疲劳的快速恢复以及有效发挥高原训练的优势。  相似文献   

人体肌肉力量自然发展研究进展   总被引：4，自引：0，他引：4  

黎鹰  罗晓芳  张安民  王健 《体育科研》2003,24(3):35-37

介绍了人体肌肉力量自然发展的年龄规律和性别特点,分别讨论了影响人体肌肉力量自然发展的肌肉横断面积、神经支配等生理学因素的作用机制。  相似文献   

青少年男子排球运动员弹跳力素质研究     

孙鹏 《湖北体育科技》2010,29(4):443-444

弹跳力是青少年男子排球运动员应重点发展的身体素质。在弹跳力训练中应充分考虑到青少年排球运动员身体生长发育的特点、弹跳力素质训练的规律以及排球运动的专项特点。通过文献分析对排球弹跳力的定义、青少年运动员生理特点以及发展弹跳力训练的方法手段和应注意的问题进行了系统的研究。  相似文献