低氧运动调控PPARα表达的研究述评          下载免费PDF全文

鞠丽丽 《河北体育学院学报》2016,30(6):77-81

过氧化物酶体增殖物激活受体α(PPARα)是参与调控脂代谢、抑制炎症反应和促进脂肪细胞分化的重要细胞核受体.而低氧运动可通过激活一系列分子应答机制,促进机体不同组织PPARα表达及其介导的信号分子通路重新整合,从而改变机体脂代谢体系.利用文献资料法,梳理低氧刺激对机体PPARα表达影响的相关研究,总结不同组织PPARα对其低氧运动产生代偿性适应的可能分子机制,旨在更好地解释低氧环境下运动机体PPARα在调控脂代谢中的作用.  相似文献   

用科学发展观统领广西林业高等教育可持续发展     

张力 《教育与职业》2006,(21):9-10

为促进广西林业高等教育的可持续发展,应以科学发展观为指导,坚持以人为本,遵循客观规律。必须确立科学的广西林业高等教育可持续发展观,构建社会主义的和谐林业职业院校校园,全面推进教育创新,以实现林业高等教育的大发展。  相似文献   

Jiefo Weblearning系统在电力远程教育培训系统中的应用     

叶小平  魏力 《江西电力职业技术学院学报》2006,19(1):51-52

以内蒙古电力公司的电力远程教育系统为例,介绍了“通用学习平台Jiefo Weblearning”在电力系统中的应用。  相似文献   

期刊机读目录中出版年著录存在的问题及对策     

吕丽 《河南图书馆学刊》2006,26(3):79-80

期刊作为一种连续出版物,在其长期的出版发行历程中可能会发生各种复杂的变化,这些变化在期刊的机读目录中必然有所反映。其中关于更名期刊机读目录中出版年的著录,在实践中存在一些问题,对此问题提出了自己的看法及建议。  相似文献   

青藏高原自然资产利用的生态空间占用评价   总被引：25，自引：4，他引：25  

鲁春霞谢高地成升魁张镱锂 《资源科学》2001,23(6):29-35

生态空间占用是衡量人类对自然资源的利用程度以及自然界为人类提供的生命支持服务功能的一种方法。它根据维持人类的自然资源消费量和同化人类产生的废气物所需要的生产性空间进行估算。并与给定区域实际生物承载力进行比较，衡量区域的持续发展状况。青藏高原作为世界的第三级，有其独特的生物资源和自然景观。本文以青海省为例，评估了青海省自然资产利用的生态空间占用状况。计算结果表明，青海省的人均占用世界平均产量的生态空间为1.8hm2,青海省的自然资产利用程度尚在其实际生物承载力范围之内。青海省的工业生产占青藏高原的3/4，人口占青藏高原总人口的一半左右，因此，原材料和能源消费应该高于青藏高原的平均水平。由此推知，青藏高原的人均生态空间占用小于1.8hm2,而青藏高原实际生物承载力人均8hm2,应该有较大的生态盈余。  相似文献   

灯盏花的研究进展     

张举成任驰  肖兰英 《蒙自师范高等专科学校学报》2005,3(6):27-29

综述了近几十年来有关灯盏花的化学成分、药理作用、配伍及化学成分的构效关系研究工作．  相似文献   

Fresnel圆屏衍射的计算机模拟演示     

游开明  薛莉  陈列尊  王友文  戴志平 《衡阳师范学院学报》2012,33(3):40-43

基于Huygens-Fresnel衍射积分和Babinet原理,利用Hankel变换算法及球面波因子处理方法,在普通PC上使用MFC编程较好地实现了Fresnel圆屏衍射的计算机模拟演示。演示中,Fresnel圆屏衍射的光强剖面分布、衍射图样和中心光强分布分别随光的传输距离和波长及圆屏半径的改变而变化,光的传输距离和波长及圆屏半径由三个滚动条分别控制。  相似文献   

中小学教师师德观的内隐研究   总被引：10，自引：0，他引：10  

方晓义  陈浩莺  王永丽  林崇德 《北京师范大学学报(社会科学版)》2002,(1):28-33

师德对教师的教育教学行为有着重要的作用,而教师师德的好坏又直接取决于教师的师德观.通过对86名中小学特级教师的师德观及其影响因素的实证研究发现,教师的师德观存在很大的不平衡性和个体差异,在"严谨治学"、"有责任心"、"积极性"、"拥有新知识、积极创新"方面存在明显的性别差异,在"热爱学生"、"有责任心、积极性"方面存在明显的职称差异,在"热爱教育、热爱学校、热爱本专业方面"存在明显的地区差异,而年龄、教龄和学历对教师的师德观没有显著影响.在中小学教师师德培养中,应加强对教师"严谨治学"、"公平对待学生"、"提高科研水平"等的培养.  相似文献   

Physiological responses in different intensities of resistance exercise – Critical load and the effects of aging process     

Vivian Maria Arakelian  Cássia da Luz Goulart  Renata Gonçalves Mendes  Nuno Manoel de Sousa  Renata Trimer  Solange Guizilini 《Journal of sports sciences》2019,37(12):1420-1428

Aim was to identify critical load (CL) in young and elderly apparently healthy male cohorts. To contrast the metabolic, cardiovascular and perceptual responses on CL according to age. We evaluated 12 young (23 ± 3 years) and 10 elderly (70 ± 2 years) apparently healthy active males, who underwent: (1) 1 repetition maximum (1RM) test on a 45° Leg Press; (2) on different days, three high-intensity resistance exercise constant load tests (60%, 75% and 90% 1RM) until fatigue (Tlim). Absolute values of both the CL asymptote and curvature constant (kg) were significantly lower in elderly subjects (P < 0.05). In contrast, elderly subjects demonstrated a significantly higher number of repetitions at CL when compared with young subjects (P < 0.05). As expected, oxygen uptake (VO₂) and heart rate (HR) during maximal aerobic exercise testing were significantly reduced in older subjects. However, percent-predicted aerobic capacity were higher in older subjects (P < 0.05). In addition, blood lactate ([La^?]) corrected to Tlim and rating of perceived exertion values were greater in younger subjects at all intensities (P < 0.05). These findings, despite reduced force production in older subjects, endurance-related parameters are well preserved according to age-adjusted percent-predicted values in apparently healthy males.  相似文献   

Effect of a Brazilian Jiu-jitsu-simulated tournament on strength parameters and perceptual responses     

Daniele Detanico  Rodolfo André Dellagrana  Marina Saldanha da Silva Athayde  Rafael Lima Kons  Angel Góes 《Sports biomechanics / International Society of Biomechanics in Sports》2017,16(1):115-126

This study aimed to analyse the effects of a simulated Brazilian jiu-jitsu (BJJ) tournament on vertical jump performance, grip strength test and perceived effort responses. 22 male BJJ athletes participated in a simulated tournament consisting of three 7 min matches separated by 14 min of rest. Kimono grip strength test (KGST), counter movement jump (CMJ) and rate of perceived exertion (RPE) were measured before and after each match, while RPE of specific areas was assessed after three matches. ANOVA for repeated measures was used to compare strength parameters after each match with the level of significance set at 5%. The key results showed a significant decrease of jump height (p = 0.001) and net vertical impulse in the CMJ (p = 0.031), as well as a reduction of the number of reps in the KGST (p < 0.001). A significant increase of RPE was found throughout the matches (p < 0.001). Considering the RPE in specific areas, no differences were observed between the upper and lower body (p = 0.743). We conclude that the BJJ simulated tournament generated a decrease of performance in both upper and lower limbs and provoked a progressive increase in the effort perception over the matches.  相似文献