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81.
运动员某些生理,生化指标的时间生物学特征探讨 总被引:1,自引:0,他引:1
对26名男性运动员的环磷酸腺苷(cAMP)、环磷酸鸟苷(cGMP)、可的松(Cortisol)、睾丸酮(T)在24小时内的不同时刻的量变的研究,以探讨其时间生物学特征,为运动员选材提供依据。结果发现cAMP、Cortisol、T均表现出明显的近似昼夜节律(P<0.05),cGMP不具有昼夜节律(P>0.05),cAMP的峰相位处于上午8时左右,Cortisol、T的峰相位与cAMP基本同步。可的松的节律稳定性好,可作为判定机能调整幅度的标志节律。 相似文献
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PURPOSE: Identify journal collection access and use factors. SETTING AND SUBJECTS: University of North Carolina at Chapel Hill's Health Sciences Library patrons. METHODOLOGY: Survey forms and user interactions were monitored once a week for twelve weeks during the fall 1997 semester. The project was based on a 1989 New Mexico State University study and used Kantor's Branching Analysis to measure responses. RESULT: 80% of reported sought journal articles were found successfully. Along with journal usage data, the library obtained demographic and behavioral information. DISCUSSION AND CONCLUSIONS: Journals are the library's most used resource and, even as more electronic journals are offered, print journals continue to make up the majority of the collection. Several factors highlighted the need to study journal availability. User groups indicated that finding journals was problematic, and internal statistics showed people requesting interlibrary loans for owned items. The study looked at success rates, time, and ease of finding journals. A variety of reasons contributed to not finding journals. While overall user reports indicated relatively high success rate and satisfaction, there were problems to be addressed. As the library proceeds in redesigning both the physical space and electronic presence, the collected data have provided valuable direction. 相似文献
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Based on a discussion about appraisal which has been going on for over a 100 years, the so-called vertical and horizontal appraisal have been developed and tested since the middle of the 1990s. During this process the tasks, functions and competences of the agencies, which are to be appraised were analysed. The appraisal of the content itself is undertaken only when multiple archival processing has been eliminated by this method and the most significant records identified. Actual tasks and functions of single administrative branches of different institutions (federal government, states, counties, and municipalities) are appraised, apart from already closed records. In this way, agencies creating archives and records today receive written decisions on the appraisal of records, which will be offered to the archives in future. Archivists of different institutions are involved in this appraisal procedure. The experience gained here has continually developed the techniques of vertical and horizontal appraisal. This appraisal procedure is being further developed in a constant balance between theory and practice. 相似文献
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While archivists in western and eastern Germany may have different traditions, they face the same challenges presented by the use of information technology in government offices in recent years. Documentation strategies and goals in advising agencies must be developed in consideration of current professional debate and limited resources. The following article presents tendencies in governmental records management, advising strategies of archives, and schemes for broad-scale appraisal based on observations at the level of the governments of the German Länder and includes case studies from Saxony. 相似文献
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