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1.
《科技通报》2015,(8)
目的:饱和脂肪酸是影响人体肥胖的重要因素,研究8周期慢跑运动对饱和脂肪酸的代谢影响,建立肥胖者8周期慢跑运动对饱和脂肪酸代谢的定量分析模型,为预防和治疗肥胖导致的综合症提供依据。方法:以至少有2年早上进行跑步训练的434名8周期慢跑运动爱好者为研究对象,通过一定阶段的8周期慢跑运动训练,测试受测者体内的饱和脂肪酸代谢,分析对甲状腺激素的反馈调节动能,测试时间为1个月。观测通过8周期慢跑运动锻炼后的饱和脂肪酸代谢指数,对比参照组与测试组变化关系,得到数学关系模型。结果:通过阶段性8周期慢跑运动训练,8周期慢跑运动10 min后可以使得胆固醇降低,通过脂肪燃烧,提高体质。经过每天不少于15 min小时的8周期慢跑运动运动,PC-WP均值上升为21.2,CI值上升为39;测试组2经过为期1个月,每天不少于15 min的8周期慢跑运动运动,PCWP均值上升为22.7。结论:通过8周期慢跑运动训练,能有效促进饱和脂肪酸的能量代谢反馈调节,提高饱和脂肪酸的代谢水平,有效增加脂肪燃烧速率,确保身体机能有效运转,确保身体处于健康状态。 相似文献
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目的:分析锌元素对高强度运动肾促红细胞生成的影响。方法:选取某体育学院60名男性运动员,将运动员随机分为对照组20人,运动组40人,进行长跑运动训练1周后,根据肾促红细胞血象参数、体重以及运动能力将运动组运动员,划分为运动组20人和补锌运动组20人,持续进行长跑运动和锌元素的补充,观察补充锌元素对高强度运动肾促红细胞血象以及血清肾促红细胞EPO水平的影响。结果:5周长跑运动训练后的运动组运动员与对照组肾促血细胞指标比较,运动组的Hb、RBC和Hct均显著低于对照组(P0.01)。对比补锌运动组和对照组可以看出,补锌运动组的肾促红细胞平均体积(MCV)明显高于对照组(P0.05),其肾促红细胞平均血红蛋白量(MCH)以及红细胞平均血红蛋白浓度(MCHC)明显低于对照组(P0.05),尤其两组的MCHC指标,具有非常显著性差异(P0.01),但两组间剩余肾促红细胞相关参数并无显著性差异(P0.05),补锌运动组的Hb、RBC、Hct水平明显高于运动组(P0.01或P0.05)。补锌运动组运动员的血清肾促EPO水平明显高于对照组和运动组,存在显著性差异(P0.05)。结论:补充锌元素能够促进运动员肾促红细胞的生成,锌元素在一定程度上能够提高机体的运动能力。 相似文献
3.
《科技通报》2015,(12)
目的:分析高强度体育运动中人体运动的易损伤区域。方法:进行不同的测试。结果:高强度运动组受试者心率明显升高,和正常运动组相比,具有显著性差异,而高强度运动组、正常运动组受试者的体温、收缩压及舒张压指标无显著性差异。高强度运动下能够使受试者血清SOD和MDA含量以及血清HPS70显著增加,和正常运动组相比具有显著性差异。高强度运动组和平常运动组受试者的Ig A和Ig G含量没有很大的变化。高强度运动使血清PRL含量和血清GH含量显著增加,与正常运动组相比具有非常显著性差异,血清皮质醇含量也显著增加,与正常运动组相比具有显著性差异。结论:高强度运动能够使人体运动的易损伤区域各相关指标发生显著的变化。 相似文献
4.
目的:分析高糖量摄入与运动MDA指标的关系。方法:选取16名运动员,按照年龄、体重、运动级别随机划分成高糖摄入实验组和对照组,补充前后一个月分别进行功率自行车测试,测试总功,对运动员的RBC-GSH-PXRBC-SOD及血浆MDA的含量进行测试,分别测定不同高糖量摄入运动组和对照组中运动员机体血清中丙二醛(MDA含量,并进行运动前后自身对照比较。结果:实验组的总功、总功/LBW较补液前有明显提高(P0.05对照组各项指标均无统计学差异;摄入蔗糖后,安静时RBCMDA的含量两组间仍无显著性差异,实验组运动后即刻RBC-MDA含量明显低于对照组运动后水平(P0.05)实验组运动后RBC-SOD含量无显著性变化,实验组RBC-GSH-Px含量较运动前有明显提高(P0.05)同对照组无差异;摄入蔗糖后实验组RBC-GSH-Px的升高幅度显著高于对照组(P0.05)。结论:高糖量摄入增强运动自由基的代谢水平,提高了运动员的运动能力,抑制运动引发的自由基损伤。 相似文献
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目的:研究有氧运动对肥胖者儿童体脂比消耗的影响。方法:实验组运动时专业技术人员采用POLAR表对受试者的运动心率进行监控,使其控制在心率储备的20%~40%范围内,保证运动强度在有氧运动范围内。实验组每天运动3次,每次1 h,共进行5周有氧训练,运动前后各进行10~20 min的准备活动。对照组不进行有氧运动。结果:实验组体重、体重指数、体脂比、体脂含量实验后与实验前相比,实验组与对照组相比显著降低。TG实验组实验后与实验前相比,实验组与对照组相比显著降低;TC实验组实验后与实验前相比,实验组与对照组相比,均非常显著性降低,对照组实验前与试验后相比,显著性降低;HDL实验组与对照组相比,显著增加;LDL实验组实验后与实验前相比显著降低。TG、FIN、FBG末次与安静时相比,末次与首次相比,均显著降低;HDL、LDL末次与安静时相比,末次与首次相比,均有非常显著性差异;TC末次与安静时相比,显著降低,末次与首次相比非常显著性降低。Ins实验后与实验前相比,实验组与对照组相比均非常显性降低;Cor实验后与实验前相比,实验组与对照组相比均显著降低。Ins末次与安静时和首次相比,均非常显著性降低。结论:有氧运动能够增加肥胖者儿童的体脂比消耗。 相似文献
6.
《科技通报》2015,(10)
目的:研究针刺造影P-糖蛋白抑制抗胃肠肿瘤耐药作用,为胃肠肿瘤患者的康复治疗提供药物辅助治疗方案。方法:选择相关指标进行测试,采用小肠X射线气钡双重对比造影、纤维小肠镜、肠系膜上动脉造影等方法进行抑制抗胃肠肿瘤耐药作用评估。结果:以[P0.05]为差异均表示统计学上的显著性差异特征。观测指标包括胃肠分泌的6-乙酸苄酯己内酯、PEO链段上亚甲基氢,采用LOAD-max对比,与P0.05和P0.01。分析得出DP,PP,MAP的显著性差异P0.05,统计结果显示,在肿瘤半衰期代谢时间为20~30 h,得出患者的抗药变性检测形态变化曲线。结论:通过针刺造影P-糖蛋白抑制抗胃肠肿瘤耐药性作用分析,患者的胃肠肿瘤块缩小,可以有效提高患者的免疫能力,降低赖药性,提高抵抗力,促进患者康复。 相似文献
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8.
目的:分析小鼠过度运动状态下内分泌症状特征。方法:将小鼠随机分成空白对照组、常规运动组、过度运动组三组,每组各10只,空白对照组每天无任何特殊运动,正常饲养,过度运动组小鼠进行过度训练,常规运动组小鼠在与过度运动组相同的游泳箱中每天进行30 min的游泳训练,持续7 d,测定心系数、收缩压、心率、血浆心钠索、ET、Ang、NO、NOS等指标。结果:和对照组相比,常规运动组和过度运动组小鼠的心脏系数/体重指数变化具有显著性统计学意义。运动后常规运动组和过度运动组的平均血浆心钠素水平均非常显著高于运动前,运动前后常规运动组的平均血浆心钠素量也分别显著高于过度运动组。与对照组相比,常规运动组ET具有显著性差异,Ang具有极显著性差异,过度运动组的Ang显著低于常规运动组。常规运动组与过度运动组与对照组相比,NO、NOS活性均有非常显著性差异,过度运动组小鼠NO活性显著低于常规运动组小鼠,过度运动组小鼠NOS活性低于常规运动组小鼠,但无显著性差异。结论:过度运动状态下,小鼠体内分泌各指标值降低,内分泌系统活力大大降低,紊乱程度增大,使得小鼠机体功能大大减弱。 相似文献
9.
目的:分析强污染下运动对心肺功能的影响。方法:选取某市某校大学生志愿者60名,其中男生30名,女生30名,将其随机划分成四组,分别为强污染运动组、强污染对照组、低污染运动组、低污染对照组,每组20人,强污染运动组在强污染环境下进行Bruce方案,强污染对照组不进行运动,但与强污染运动组共同处于强污染环境下,低污染对照组不进行运动,但处于低污染环境下。结果:强污染运动组的安静心率、收缩压、舒张压、脉搏压、心功指数均高于强污染对照组与低污染对照组,且安静心率、脉搏压、心功指数与低污染对照组相比具有显著性差异(P0.05),与强污染对照组相比具有非常显著性差异(P0.01);收缩压与强污染对照组相比具有显著性差异(P0.05)。强污染运动组ESD、EDD、ESV、EDV、MSER以及MVCF均高于强污染对照组和低污染对照组,其中EDV与MVCF和低污染对照组相比,具有显著性差异(P0.05);EDV、MSER与强污染对照组相比,具有显著性差异(P0.05);MVCF与强污染对照组相比具有非常显著性差异(P0.01)。强污染运动组实验后FVC、FEV1、FEF25%-75%、FEF与实验前相比明显增加,且具有非常显著性差异(P0.01);MVV较实验后明显降低,且具有非常显著性差异(P0.01),而强污染对照组与低污染对照组实验前后均无显著性差异。结论:强污染运动下,运动对改善和提高心肺功能具有非常积极的作用。 相似文献
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目的:分析低氧环境下的训练对肌肉爆发力参数的影响。方法:随机选取某市某高校志愿者30名,将其随机分为低氧运动组和常氧运动组,低氧训练组的15位受试者在模拟青海地区海拔环境下进行训练。常氧训练组受试者进行常氧测试。两组受试者均进行相同强度的训练,对最大摄氧量、低氧通气速率、肌肉收缩产生某个运动关节屈伸扭转力矩、对抗肌比、相对平均功率等指标进行测试。结果:低氧训练组受试者最大摄氧量显著低于常氧训练组(P0.05),同时随着运动负荷的逐渐增加,最大摄氧量逐渐降低;两组受试者通气反应速率均随运动负荷的增大而显著增加。低氧训练组和常氧训练组相比,具有非常显著性差异(P0.01)。两组膝关节屈伸肌快速相对峰值力矩实验后均有非常显著性提高;伸肌快速相对峰值力矩增长量低氧训练组非常显著性高于常氧训练组,P0.01;屈肌组间相比,无显著性差异。结论:低氧环境下训练能够有效增强肌肉爆发力,对肌肉爆发力参数有积极的影响。 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
12.
《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
13.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
14.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
15.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
16.
Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
17.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
18.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
19.
Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
20.
Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献