Protective Role of <Emphasis Type="SmallCaps">l</Emphasis>-Arginine Against Free-Radical Mediated Oxidative Damage in Patients with Unstable Angina     

Tripathi P  Chandra M  Misra MK 《Indian journal of clinical biochemistry : IJCB》2010,25(3):302-306

Unstable angina is a critical condition of heart resulting from narrowing of vessels supplying blood to heart. Ischemia of the myocardium leads to oxidative stress and severe tissue damage. The objective of the present study was to determine the effect of l-arginine administration on the oxidant–antioxidant homeostasis which otherwise gets imbalanced in patients with cardiovascular diseases. The results obtained, show improvement in the oxidant–antioxidant levels of the subjects upon incorporation of l-arginine. Our findings suggest that supplementation of l-arginine along with regular anti-anginal therapy may be beneficial to the patients of unstable angina.  相似文献   

对新形势下体育院校图书馆事业深入发展的思考--兼论2003年以来教育部对体育院校图书馆的评估   总被引：4，自引：0，他引：4  

周德书 《图书馆论坛》2005,25(6):152-155

从体育院校图书馆评估的基本内容和重点、体育院校图书馆发展现状与评估指标的列比分析、体育院校图书馆今后发展的重点、体育院校图书馆深入发展的对策几方面探讨了图书馆评估及体育院校图书馆事业的深入发展。  相似文献   

激光淬火齿轮的疲劳寿命和耐磨性试验研究     

石娟  吴钢  范雪燕  戴忠森 《上海海事大学学报》2004,25(1):92-96

介绍了激光淬火齿轮的疲劳寿命试验,激光淬火齿轮与调质齿轮的疲劳寿命对比试验,抗剥落试验,以及激光淬火齿轮表面残余应力的测定等;分析了影响齿轮激光淬火抗疲劳破坏和耐磨损的因素;提出激光淬火齿轮疲劳寿命大大高于常规淬火齿轮。  相似文献   

Examining coaches’ perceptions of how their stress influences the coach–athlete relationship     

Richard C. Thelwell  Christopher R. D. Wagstaff  Michael T. Chapman  Göran Kenttä 《Journal of sports sciences》2017,35(19):1928-1939

This study extends recent coach stress research by evaluating how coaches perceive their stress experiences to affect athletes, and the broader coach–athlete relationship. A total of 12 coaches working across a range of team sports at the elite level took part in semi-structured interviews to investigate the 3 study aims: how they perceive athletes to detect signals of coach stress; how they perceive their stress experiences to affect athletes; and, how effective they perceive themselves to be when experiencing stress. Following content analysis, data suggested that coaches perceived athletes able to detect when they were experiencing stress typically via communication, behavioural, and stylistic cues. Although coaches perceived their stress to have some positive effects on athletes, the overwhelming effects were negative and affected “performance and development”, “psychological and emotional”, and “behavioural and interaction” factors. Coaches also perceived themselves to be less effective when stressed, and this was reflected in their perceptions of competence, self-awareness, and coaching quality. An impactful finding is that coaches are aware of how a range of stress responses are expressed by themselves, and to how they affect athletes, and their coaching quality. Altogether, findings support the emerging view that coach stress affects their own, and athlete performance.  相似文献   

调质40Cr钢喷丸和喷丸后精车残余应力的实验研究     

孔庆华  于云鹤  陈耀松 《上海海事大学学报》1999,(4)

对不同硬度的调质40Cr钢喷丸后的残余应力和不同硬度的调质40Cr钢喷丸后精密车削的残余应力,进行了测试与分析。研究结果对控制和利用机械加工的残余应力,具有理论和实际意义  相似文献   

Role of Oxidative Stress in Various Stages of Psoriasis     

Kadam DP  Suryakar AN  Ankush RD  Kadam CY  Deshpande KH 《Indian journal of clinical biochemistry : IJCB》2010,25(4):388-392

Psoriasis is a chronic inflammatory, proliferative skin disease characterized by pathological skin lesions due to various exogenous and endogenous factors. It is associated with a number of biochemical and immunological disturbances. Recently, it has been suggested that increased reactive oxygen species (ROS) production and compromised function of antioxidant system may be involved in the pathogenesis of this disease. In the present study, 90 psoriasis patients were selected. Disease severity was assessed by psoriasis area severity index score and grouped as mild, moderate and severe (each group consists of 30 subjects) and compared with 30 healthy controls. Serum levels of malondialdehyde, nitric oxide end products and the activities of antioxidant enzymes such as erythrocyte-superoxide dismutase, catalase and total antioxidant status were investigated in these groups/subjects. As compared to controls, we found severitywise significantly increased serum malondialdehyde, nitric oxide end products with decrease in erythrocyte-superoxide dismutase activity, catalase activity and total antioxidant status in patients with psoriasis suggesting worsening of the disease. It seems to be linked with the enhancement of Reactive Oxygen Species production and decreased antioxidant potential in psoriasis.  相似文献   

大学生压力测量工具的研制与检验   总被引：3，自引：0，他引：3  

殷恒婵  卢敏  苑文燕  陈雁飞 《体育科学》2007,27(6):45-48

研究目的：一套测量大学生压力的工具，使该工具既能测出个体的总体压力状况，又能对压力的不同维度做进一步的区分与评价；研究方法：1）编译“压力测量问卷”，通过对1060名大学生进行测试，并对结果进行了验证性因素分析，最终形成了包含4维度40个项目的“完整版大学生压力测量问卷”，具有良好的信度、效度；2）对完整版问卷进行了简化修订，并通过对原有样本的验证性因素分析，形成了包含4维度21个项目的“简化版大学生压力测量问卷”；3）重新选取1547名大学生，对简化版问卷进行验证性因素分析，证明“简化版大学生压力测量问卷”具有良好的信度、效度。  相似文献   

运动员组织性应激研究的源起与现状     

娄虎  颜军  杨华 《山东体育学院学报》2007,23(6):76-79

组织性应激是指与个体工作所在的组织直接并且主要相关的环境需要同个体之间的一个持续相互作用的过程。由于运动员工作环境的特殊性,因此提出组织性应激的概念可以更加有效地理解运动员应激。运动员组织应激源主要包括5个类别:体育本身固有因素,运动员在体育组织机构中的角色,体育运动项目中人与人之间关系和交流的需要,运动员竞技生涯和成绩发展问题,体育运动项目的组织结构和氛围。未来的研究应该注意进入组织内部测量,完善相关的研究方法,以及建立一体化的理论模型等方面。  相似文献   

人体适应能力结构维度的理论研究     

任弘  邢文华 《北京体育大学学报》2007,30(11):1505-1507

反映中国人体质状况的国民体质监测已经成为我国的一项政府性工作,体质研究也已成为体育领域的研究热点.理论上人体体质包括形态结构、生理机能、身体素质及运动能力、心理因素和适应能力五个方面,但因测量方法的限制,在现行的国民体质监测指标中仅包括前三项内容.本研究通过文献资料法、访谈法和开放式调查法对体质理论中的适应能力进行了深入的理论研究,认为人体适应能力是人维持身体与内外环境间平衡的能力,具体指个体维持自身与其生存的自然环境、社会环境及生理环境间协调,最大限度地保持自身健康的能力.人体适应能力结构划分为三个维度:1) 对自然环境的适应(4个子维度);2) 对社会环境的适应(3个子维度);3) 对自身生理性改变的适应及对疾病的抵抗能力(4个子维度).  相似文献   

Practical considerations when supporting transitions for pupils with speech,language and communication needs     

Ruth Perfitt 《British Journal of Special Education》2013,40(4):189-196

This article investigates the impact of transitions upon pupils aged 11–14 with speech, language and communication needs, including specific language impairment and autism. The aim is to identify stress factors, examine whether these affect any subgroups in particular and suggest practical strategies to support pupils through transitions. Stress factors discussed include homework, bullying, independent learning and social situations. The compared subgroups include pupils with diagnosis of SLI and autism, those receiving free school meals and those not, and pupils achieving at different National Curriculum levels. The sample is too small to be representative or generalisable but some recommendations for practice are given.  相似文献