共查询到20条相似文献，搜索用时 62 毫秒
1.
目的:研究通过高原耐力训练,生成体内血胰岛素,并建立起与抗高原反应能力关系模型,评估人体在高原等恶劣环境下训练的生理机能。方法:研究对象为本校篮球队在青藏高原驻训的23名篮球队员,采用SPSS 13.0统计软件,测得运动员体内产生的血胰岛素聚合物Pluronic-b-PCL(Entry 0)和Pluronic-b-P(CL-co-BCL)的显著差异性,从而分析与抗高原反应能力的关系。引入有助于提高抗高原反应的半乳糖分子,通过DLS测试粒子表面的zeta电位值,分析受测运动员的调节纤维激酶值。结果:在阳离子型嵌段共聚物P(PEGMEMA16-co-PEGMA7)-b-PDMAEMA53中N/P比分别为0.3,0.6,0.8,1.5,2.5,3.0,8.0,受测运动员的生成的P(PEGMEMA-co-PEGMA)-b-PDMAEMA为2.155 g,0.1 mmol,PMDETA(104μL,0.5 mmol),Cu Cl(0.0258 g,0.25 mmol),在运动后24 h,血胰岛素与抗高原反应能力相关系数有所增大,运动后48 h,血胰岛素生成与抗高原反应能力相关系数有所较小,同时BP与调节纤维激酶相关系数增大,抗高原反应能力显著提高(P0.05)。结论:通过高原耐力训练,逐步增加红细胞和血红蛋白的生成,促进血胰岛素生成,改善血液输送氧的能力,使新进入高原的人发挥他正常的生理效能,指导高原训练和高原反应病症的治疗和预防。 相似文献
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目的:分析长期有氧运动对肥胖人群血脂调节的影响。方法:按照世界卫生组织(WHO)提供的肥胖标准,在某市某学校中选取30名肥胖大学生,将实验对象随机划分成实验组与对照组,各15名。实验组按照训练方法进行15周的有氧训练,同时在第一次和最后依次运动后立即对静脉血测血脂、血胰岛素、皮质醇等生化指标进行测试,另一组作对照,分别在15周前后对两组受试者的体成分、血脂、胰岛素、瘦素进行测试。结果:经15周有氧训练后,实验组体重、体重指数、体脂百分比、体脂含量均显著下降,(P0.05或P0.01),显著低于对照组(P0.05或P0.01),而取值体重略有增高。实验组血清TG、TC、LDL含量显著下降(P0.05或P0.01),HDL含量显著增加(P0.05);和对照组相比,血清TG、TC、LDL含量显著降低(P0.05或P0.01),HDL含量显著升高(P0.05)。实验组血胰岛素水平显著下降,和对照组相比显著降低(P0.01);实验组瘦素水平明显下降,和对照组相比显著降低(P0.05)。结论:长期有氧运动能够促进脂肪的分解代谢,使得血脂中各成分比例更有利于健康,调节肥胖人群内分泌,有助于减肥与身体健康。 相似文献
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目的:探讨雷火灸联合仿生物电刺激对肥胖型多囊卵巢综合征患者体重、腰围、臀围及血糖、胰岛素、血脂等方面的影响。方法:纳入肥胖型多囊卵巢综合征患者60例,按随机数字表分为治疗组和对照组。治疗组采用雷火灸联合仿生物电刺激治疗,对照组予仿生物电刺激,治疗3个月经周期,观察治疗前后体重、腰围、臀围、空腹血糖、胰岛素、甘油三酯、总胆固醇、低密度脂蛋白、高密度脂蛋白以及胰岛素抵抗指数、体重指数、腰臀比的改变来评价治疗效果。结果:组内治疗前后比较,治疗组治疗后体重、腰臀围、BMI、WHR较治疗前下降(P0.05),TG、TC、FPG、FIN、HOMA-IR较治疗前下降(P0.05),LDL、HDL较治疗前改善(P0.05);对照组治疗后体重、腰围、BMI、WHR较治疗前下降(P0.05),臀围较治疗前下降(P0.05),TG、TC、FPG、FIN、LDL、HDL较治疗前改善(P0.05),HOMA-IR较治疗前下降明显(P0.05);两组间比较,治疗组治疗后体重、腰围、腰臀比下降较对照组显著(P0.05)。结论:雷火灸联合仿生物电刺激在改善肥胖型多囊卵巢综合征患者的体重、腰围、臀围及血糖、血脂方面取得较好疗效,值得临床推广。 相似文献
4.
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
5.
目的:了解当前在校大学生的血脂状态,为预防青年人血脂异常提供客观依据。方法:随机抽取昆明医科大学海源学院223名在校大学生,空腹静脉采血并分离血清,用AU5421全自动生化分析仪进行总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇浓度水平进行检测,用《中国成人血脂异常防治建议》(2007)中提出的标准分析血脂异常发生率。结果:(1) 223名在校大学生总胆固醇、甘油三酯、高密度脂蛋白胆固醇和低密度脂蛋白胆固醇平均水平分别为4.22±0. 78 mmol/L、1.24(0.92,1.79) mmol/L、1.23±0.27 mmol/L、2.31±0.76 mmol/L,均在理想范围。其中,甘油三酯平均水平男生高于男生,而高密度脂蛋白胆固醇平均水平女生高于男生,差异经统计学处理均有显著性意义(p0.05)。(2) 223例研究对象中,总胆固醇和低密度脂蛋白胆固醇在理想水平的在90%以上,男女生间异常率差异无统计学显著性意义。血清甘油三酯水平总体升高率为27.35%,男生升高率大于女生,差异有统计学显著性意义,p0.001。高密度脂蛋白胆固醇水平总体降低率23.76%,男生降低率大于女生,差异有统计学显著性意义,p0.05。结论:在校大学生血清总胆固醇和低密度脂蛋白胆固醇水平良好,但甘油三酯和高密度脂蛋白胆固醇异常普遍存在,有必要加强大学生的血脂教育,合理控制血脂水平。 相似文献
6.
目的:观察补充烟酸对DOMS时骨骼肌形态结构的影响,为DOMS的防治提供科学依据。方法:成年大鼠90只随机等分为对照组(E)和烟酸组(N),各组又分安静对照组、运动后即刻组、运动后24h、运动后48 h及运动后72 h组。运动方式L18 m/min,-16°,120 min。结果:补充烟酸组在同等强度的离心运动后,肌肉损伤的程度轻于对照组,肌纤维损伤和炎症反应有不同程度的减轻,炎症程度小于对照组,炎症灶的数量也少。且在48小时后的恢复状况好于对照组,肌纤维肿胀减轻,溶解的肌纤维逐渐恢复,炎症细胞数量减少,核聚集现象减轻,炎症灶面积缩小。结论:大鼠长时间离心运动后,骨骼肌出现微细损伤,在运动后48小时最为严重,而补充烟酸能减轻骨骼肌组织学和超微结构的损伤变化。 相似文献
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8.
目的:分析强负荷运动量同心率变异的关系。方法:将某学院40男子健美操运动员,按照强负荷运动量从小到大划分成,短时间、中时间以及长时间运动三组实验组,每组10名运动员,普通运动员10名,设为安静组。对实验组以及安静组的运动员心率变异性机进行心率变化、时域、频域以分析,对强负荷运动员的运动量与心率变异关系进行分析。结果:随着运动员运动负荷量的逐渐增加,长时间运动结束后的心率下降最为显著,运动员的平均RR、SDNN、SDNN/HR都不断降低,长时间运动员的平均RR、SDNN/HR明显低于安静组,SDNN值略低于安静组,不具备显著性(p0.05)。结论:随着强负荷运动量的逐渐增加,运动员心率变异性逐渐降低,总体自主神经调控功能增强,交感神经张力在运动中持续升高,迷走神经对交感神经的抑制逐渐降低。 相似文献
9.
《科技通报》2015,(12)
目的:研究运动焦虑对运动员的相关生理指标影响分析,并进行数学模型构建,实现定量分析,准确分析运动焦虑对运动员身体健康指标的制约因素,并进行科学指导。方法:采用流式细胞方式对抗原体表面的CXCR3进行受体分析,得到不同组中的纤维细胞表面的RNA浓度为10 mol/L,取0.4 m L金磁微粒于离心管中磁性分离,弃上清,用0.5 m L的偶联缓冲液(20 mmol/L,p H7.4)清洗,引入运动焦虑的蛋白脂质体的自我磷酸化活性检测,评价蛋白脂质体的功能稳定性,实现运动焦虑对运动员相关生理指标影响建模分析。结果:训练中最大摄氧量VO2max的值都要大于台阶实验数值,达到最大摄氧量VO2max,DP,PP,MAP的显著性差异P0.05,运动状态下,使得人体血动脉的血红蛋白和脂质体共存于组分,促进人体耐运动焦虑的末端苏氨酸物体的生成。血蛋白和脂质体在组分3内的最大回收率分别为80%和90%。结论:运动焦虑对运动员的生理指标有较大影响,采用本文方法进行焦虑调节,促进运动员的耐力水平和身体机能,缓解运动焦虑症状,提高运动锻炼的积极性和有效性。 相似文献
10.
目的探讨血脂浓度与Ⅱ型糖尿病并发症的关系.方法检测我区保健所住院病人Ⅱ型糖尿病患者血清脂蛋白浓度,分析其与Ⅱ型糖尿病并发症的关系.结果Ⅱ型糖尿病患者血清脂蛋白浓度[TG(3.56±1.91)TC(4.81±1.00)]明显高于对照组[TG(1.52±0.85)TC(3.05±0.93),P＜0.05或P＜0.01].结论糖尿病不仅有糖代谢异常,同时还伴有脂质代谢异常,老年糖尿病患者不仅要控制血糖,还要很好地测定和控制血脂的浓度,从而早期防治并发症和减少心脑血管病的发生. 相似文献
11.
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
12.
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
13.
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
14.
《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
15.
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
16.
《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
17.
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
18.
Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
19.
Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
20.
《中国科学院院刊(英文版)》2014,(3)
<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence 相似文献