田径运动员最大摄氧量和无氧功测试中血乳酸的应用

目的:研究田径运动员最大摄氧量和Wingate测试后血乳酸的变化,分析血乳酸对测试结果的意义。方法:测试田径短跑运动员36例和中长跑运动员29例的最大摄氧量和Wingate无氧功,以及测试后的血乳酸值。结果:最大摄氧量测试后血乳酸数值为9～11mmol/L左右,摄氧量与乳酸值没有直接相关关系,但不同项目之间有一定的差异;Wingate测试后血乳酸数值一般大于12mmol/L,测试的主要评价指标与乳酸值都有较高的相关关系。结论:血乳酸值对于最大摄氧量测试意义不大,但对于Wingate测试可以作为一项辅助评价指标。     

大叶紫薇叶中降血糖活性成分的筛选

为筛选大叶紫薇叶中具有降血糖活性的成分,采用3T3-L1细胞葡萄糖消耗模型作为检测手段,对大叶紫薇叶提取物采用HP-20树脂吸附、溶剂萃取、制备薄层分离和制备高效液相分离,导向筛选具有降血糖作用的各分离组分.结果发现,大叶紫薇叶中corosolic acid、熊果酸和总三萜具有降血糖活性.     

信息超载现象的传播效果分析及其解决对策

文章从传播效果的角度详尽分析了多媒体教学和网络教学中的信息超载现象,并提出相应的解决对策。     

在线考试系统设计

作为评价网络学习效果的一个环节，网上考试越来越被人们接受和认同。文章介绍了在线考试系统的功能和结构，并对该考试系统中所用到的关键技术进行了详细的介绍，包括系统的通用性和安全性、题库的建设和管理、随机组卷算法等。     

实施责任护士竞聘制的做法与成效

目的 :营造良性竞争的机制和氛围 ,全面提高护理质量。方法 :通过资格认定、理论技术考试、民主测评及双项选择 ,由护理部聘任。结果 :较好地进行了人力资源的开发 ,竞聘上岗后的护士有责任感和使命感 ,工作积极主动 ,自觉地成为科室各项工作的带头人。加之岗位工资的兑现 ,更有利于护士长在科室开展工作 ,使科室各项护理工作质量显著提高。结论 :良性的竞争运行机制 ,使优秀护理人才脱颖而出 ,体现能级对应的原则 ,从而使护理质量不断提高。     

浅析《内经》之闭经证治

收集了《内经》有关闭经方面的相关阐述从而探讨闭经的病因病机、诊断与治疗,并详细记述了《内经》对血滞经闭和血枯经闭这两类型经闭的不同治疗法度。     

Chromatic pattern-reversal electroretinograms (ChPERGs) are spared in multiple system atrophy compared with Parkinson’s disease

Abstract Idiopathic Parkinson’s disease (IPD) patients have abnormal visual evoked potentials (VEPs) and pattern electroretinograms (PERGs), attributed to dopaminergic transmission deficiency in visual pathway, probably the retina. VEP abnormalities are not reported in multiple system atrophy (MSA). The aim of this study was to investigate and compare chromatic (Ch) red-green (R-G) and blue-yellow (B-Y), and luminance yellow-black (Y-Bk) PERGs in patients with MSA and IPD. We investigated 6 MSA patients (mean age: 62±7.4 years) not undergoing any pharmacological treatment, as well as 12 early IPD patients (mean age: 60.1±8.3 years) and 12 age-matched normal observers. ChPERGs were recorded monocularly in response to full-field equiluminant R-G, B-Y and Y-Bk horizontal gratings. In MSA only responses to R-G stimuli showed minimal insignificant changes (slight but not significant amplitude reduction without any significant latency delay); no significant abnormality was detected for B-Y and luminance Y-Bk stimuli. By contrast, in IPD all responses were reduced in amplitude and delayed in latency, above all for B-Y stimuli. Present data indicate that both chromatic and achromatic PERGs are virtually unaffected in MSA, whereas in early IPD they are clearly impaired, suggesting different pathogenic retinal mechanisms and a useful simple tool for distinguishing MSA from IPD.     

Preparation of tritium‐labeled Silybin—a protectant for common liver diseases

Silymarin, the seed extract of milk thistle plant, Silybum marianum, has been used traditionally for the treatment of liver diseases and bile duct infection. Silybin 1 is the main bioactive components of silymarin, consisting a pair of diastereomers: Silybin A and Silybin B. In this article, we report the preparation of tritium‐labeled Silybin, which was accomplished by protection of Silybin as tritylated compound 2 and followed by oxidation of the primary alcohol to its corresponding aldehyde 3 . Subsequent reduction with NaB[³H]₄ and deprotection of the trityl group provided the tritium‐labeled Silybin 4 . Copyright © 2006 John Wiley & Sons, Ltd.     

Misoprostol in preventing postpartum hemorrhage: a meta-analysis.

OBJECTIVE: To assess misoprostol's ability to prevent postpartum hemorrhage (PPH) where no alternatives exist. Comparison to oxytocics demonstrates how similarly misoprostol achieves a level of effectiveness-obtainable only in hospitals-in remote locations around the world. METHOD: Using the Mantel-Haenszel fixed-effects model and the DerSirmonian and Laird random-effects model, summary statistics indicated that misoprostol's excess risk of PPH was only 4% when compared to oxytocics. RESULT: This risk difference was well within the range of expected results for all uterotonic agents and does not warrant branding misoprostol as an inferior drug. CONCLUSION: Conventional uterotonic drugs should not be used to set the lowest-accepted level of effectiveness in settings where they are entirely unsuitable. Continuing to weigh the benefits of one effective drug against another only delays the distribution of misoprostol in countries where it is the only feasible choice and must be measured against no treatment at all.     

络合碘在预防阑尾炎术后切口感染中的作用

目的络合碘预防阑尾切除术后切口感染。方法0．05％络合碘冲洗切口65例。结果络合碘冲洗的化脓、坏疽或穿孔性阑尾炎切口无感染，与传统组感染率9．1％（6／66）比较p〈0.05（x^2=4．266）。结论0．05％络合碘冲洗切口是预防阑尾切除术后切口感染的有效方法。