间歇性低氧对训练大鼠血清NO、NOS及自由基代谢的影响

低氧帐篷系统模拟海拔3000m的低氧环境，建立以SD大鼠为研究对象的动物模型，采用高住低练方法，观察间歇性低氧对训练大鼠血清NO、NOS、MDA、SOD的影响．结果表明，间歇性低氧结合运动训练能明显提高大鼠血清NO、NOS、SOD，显著性抑制MDA的水平、     

荀勖《中经新簿》是有叙录的吗?

荀勖<中经新簿>"但录题",是指其仅详载每部书的篇目,而没有介绍作者、评价图书的叙录.<皇览簿>一书因为篇目众多,而在<中经新簿>中单独分为一卷."荀勖<中经新簿>是有叙录的"这一说法,出于对史料的多种误解,不能成立.     

一氧化氮合酶在病毒性肝炎中作用的研究进展

一氧化氮(NO)参与肝细胞的多项生理功能调节,参与病毒性肝炎的病理过程。一氧化氮合酶(NOS)为产生NO的限速酶,与NO的各种生理功能密切相关。本文综述了NOS基因在正常肝组织和病毒性肝炎的不同表达情况及其作用和意义。     

老龄大鼠脑组织SOD/MDA与NO/NOS的相关性研究

目的:探讨衰老进程中老龄大鼠脑组织超氧化物歧化酶(SOD)/丙二醛(MDA),一氧化氮(N0)/一氧化氮合酶(NOS)的变化,长期游泳运动对SOD/MDA、NO/NOS的影响以及SOD/MDA与NO/NOS之间的相互关系.方法:青龄与老龄雄性SD大鼠24只,分为青龄对照组(QC)8只,老龄对照组(LC)8只,老龄运动组(LT)8只.LT组坚持游泳锻炼8周,其余二组自由生活.实验结束后取样测定脑组织MDA与NOS含量以及SOD与NOS活性,并采用直线相关法对脑组织SOD/MDA与NO/NOS进行相关性分析.结果:与青龄对照组相比,老龄对照组脑组织SOD活性下降了21.18%(P<0.01),MDA含量升高了49.68%(P<0.01),NO含量下降了38.25%(P<0.01),NOS活性下降了34.81%(P<0.01);与老龄对照组相比,老龄运动组脑组织SOD活性提高了16.95%(P>O.05),MDA含量下降了28.27%(P相似文献   

运动训练对大鼠睾丸组织NOS、Bax、Bcl-2表达的影响

目的探讨不同强度运动训练对大鼠睾丸组织NOS和细胞凋亡表达的影响及其与睾酮水平相关性。方法24只健康雄性大鼠,随机分为对照组,有氧运动组,大强度运动组,每组8只。采用递增强度方式进行跑台运动,训练过程共持续8周。测定大鼠睾丸组织NOS表达、细胞凋亡及血睾酮的含量。结果与安静对照组相比,有氧训练组大鼠睾丸组织NOS表达、细胞凋亡及血睾酮含量无显著性差异。而疲劳训练组大鼠睾丸组织eNOS和Bax表达显著升高(P<0.05),nNOSi、NOS和Bcl-2表达及血睾酮含量显著降低(P<0.05)。结论有氧训练大鼠睾丸组织NOS表达、细胞凋亡对血睾酮水平影响不显著;大强度疲劳训练大鼠睾丸组织NO过量表达,细胞凋亡明显增加,血睾酮含量显著降低。推测,大强度运动训练使大鼠睾丸组织NO过量表达,诱导睾丸组织细胞凋亡明显增多,从而抑制睾酮的分泌。     

梧州倒水白话（老派）同音字汇

记述梧州市倒水白话（老派）同音字汇,包括声母、韵母、声调,分析其声韵调特点。     

Early childhood teachers' views of nature of science: The influence of intellectual levels,cultural values,and explicit reflective teaching

This study tracked the influence of explicit reflective instructional methods on cultural values, ethical and intellectual development, and the relationship of these with preservice teachers' views of nature of science (NOS). The researchers used the Views of Nature of Science Form B (VNOS B) to describe NOS views, the Learning Context Questionnaire (LCQ) to classify preservice teachers' ethical and intellectual positions using Perry's scheme, and the Schwartz Values Inventory (SVI) to measure preservice teachers' cultural values. The interventions took place in two concurrent courses: a science methods course, and a foundations of early childhood course. The science methods course explicitly emphasized NOS throughout the semester, and the foundations of early childhood course reinforced these ideas through cultural activities that stressed empirical evidence. Analysis of data showed relationships between preservice teachers' Perry positions and responses on the VNOS B with those at higher positions exhibiting more informed NOS views. Relationships between preservice teachers' NOS views and their cultural values were identified, such as those at the dualism position holding achievement more highly for scientists than those at other Perry positions. The values preservice teachers held personally were different from those they held as important for scientists. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 45: 748–770, 2008     

基于销售排行榜的青少年推荐书目引导效果实证分析——以新闻出版总署发布的青少年推荐书目为例

一部好的推荐书目,能起到指导阅读的作用。青少年的世界观还没有定型,辨别是非和善恶的能力相对较弱,如何向他们推荐优秀读物,关系到国家和民族的未来发展。本文根据新闻出版总署每年面向全国青少年发布的阅读指导书目,从开卷信息系统中提取相关数据,对推荐书目的阅读引导效果进行实证分析。     

Faculty Perceptions of Loughborough's Online Reading List System (LORLS) at Dublin Business School (DBS)

Using a mixed methods research approach this study explores faculty perceptions of LORLS at DBS. Data generated by the study will inform advocacy, marketing and training initiatives to promote the platform. The study concludes with a number of deductive and inductive findings. The first is that although DBS faculty are highly predisposed to using LORLS, there are a number of variables that impact its use that must be considered in the context of advocacy, marketing and training activities. Grounded theory analysis of the focus group data also revealed that faculty would like LORLS to have greater interoperability with the virtual learning environment (VLE) Moodle. A key output of the study is a LORLS Process Implementation Chart for proposed inclusion on the LORLS developers' implementation blog to assist other organizations with LORLS adoption. The chart synthesizes the key findings of the literature review and of the data generated in this study.