大运动量训练时自由式摔跤运动员应激激素变化的探讨

观察了大运动量训练期8名自由式摔跤运动员应激激素、焦虑水平及主观强度感的变化。研究过程中,每周安排11次大运动量训练,共进行2次实验,每次3个取样点(运动前、即刻和次日晨)。结果显示,两次取样时期次日晨ACTH水平较运动后即刻明显降低;C水平在第二次取样运动后即刻水平和次日晨水平明显高于运动前的,并且该时期运动后即刻C水平也明显高于第一次取样时期运动后即刻水平;E水平在第二次取样运动后即刻水平明显高于第一次取样运动后即刻的,且次日晨该激素水平也明显高于第一次取样次日晨的;血浆β-END水平在第二次取样运动后即刻水平明显高于运动前,也高于第一次取样运动后即刻,第二次取样次日晨该激素水平均低于运动前和运动后即刻水平,同时低于第一次取样次日晨的;血清NE水平变化与β-END水平变化类似;而RPE等级和焦虑水平在两次测试中呈现出运动后即刻水平高于运动前和次日晨的趋势,但不明显;RPE等级与诸多应激激素之间存在着弱相关关系。这预示着,在运动员身体机能评定工作中欲采用简单易行的显示身体机能的外部指标来表现不易测到的内部变化还需努力。     

The Role that φ-Features Play in Long Distance Binding

.INTRODUCTIONThis article attempts to investigate long distance binding in Chinese under a feature- orientated ap-proach based on the studies done by Battistella ( 1 989) ,Tang ( 1 986) ,Cole and Sung ( 1 990 ) and oth-ers.The data presented in this article demonstrated,contrary to the prevailing assumption that- fea-tures of reflexives in various language are base generated,long distance reflexives before movement atL F have barren or impoverishedφ- features.On this basis,itis demonstrated thata reflexive ...     

国家皮划艇队运动员大赛前后血清瘦素与游离瘦素受体变化初探

为了解大型比赛对运动员血清瘦素与游离瘦素受体的影响,分析瘦素与sOB-R与人体内分泌之间的关系;对国家皮划艇队参加世界锦标赛女子皮艇组队员8人,男子划艇组4人,赛前3周与赛后1周作对照,取血清,测量形态指标进行研究;测试结果表明:赛前训练与比赛有下调血Leptin水平作用,在女性体内血清瘦素水平与sOB-R明显负相关,瘦素可能还与神经内分泌系统之间组成一个闭合环路,作用于下丘脑、甲状腺等处,影响内分泌的代谢.大型比赛后,血清sOB-R水平的变化有性别特异性,有不依赖瘦素的方面;sOB-R的变化可能有一定的延迟.     

Joint trajectories of behavioral,affective, and cognitive engagement in elementary school

The aim of the present study was to model student trajectories of behavioral, affective, and cognitive engagement from Grade 3 to Grade 6. The authors also examined whether teachers perceptions could predict student trajectory membership. The authors collected data from a sample of 831 students and 152 teachers. Using multiple-process growth mixture modeling, they identified 5 distinct trajectories of student engagement. Although a large majority of children presented a stable and high level of engagement on the three dimensions over time, more than one third of them showed a lower or changing level of engagement as the years progressed. These students were more likely to be boys and to be perceived by teachers as being less engaged. They also present more learning or behavioral problems and share less positive relationships with teachers. The results support the need to consider group-based differences when designing and adapting prevention and intervention strategies to favor student engagement.     

Renewed commitments in a time of vigilance: sexuality education in the USA*

Over the past 20 years, the USA has seen more than its fair share of controversy with respect to education about sexuality, sex and intimate relationships. Attention has focused on content (abstinence-only vs. comprehensive instruction), delivery (by teachers, parents, health professionals or community educators) and context (within school and beyond). In recognition of this fact, Sex Education invited the development of a virtual special issue comprising a sample of its most impactful papers on these and related topics. The 2016 Presidential election results and recent legislative action in the USA point to the importance of thinking broadly about teaching and learning about sexuality inside and outside of schools and of considering sexuality as it intersects with categories of difference, privilege and penalty, including ability, age, immigration, race, gender and class. This paper, developed as an introduction to the virtual special issue, opens with a discussion of the journal’s contributions to the ongoing discussion of pleasure and desire in sexuality education. From there, we turn to the question of what is possible given the material and ideological conditions of schooling and then to opportunities for teachers and learners outside the conventional classroom. We follow with a discussion of the place of intersectional analyses in sexuality education research, and conclude with some thoughts on sexuality education research at this political moment.     

《诗经》《楚辞》连绵词考论

文章对《诗经》《楚辞》中的连绵词做了全面考察和统计,对其中有些连绵词的意义差异、形成同源的状况以及字形变化等情况进行了评论。     

外源性生长激素对运动大鼠骨骼肌形态和代谢机能的影响

目的:旨在观察生长激素对运动大鼠骨骼肌形态及机能的影响。方法:28只雄性成熟SD大鼠在适应性训练后随机分成安静对照组、安静注射组、运动对照组和运动注射组。运动组和运动注射组进行跑台训练8周。皮下注射rhGH。结果:1)注射生长激素后,出现了肌纤维排列松散,细胞核数量减少且体积变小,骨骼肌细胞间质水肿等现象。2)在8周的训练后,肌纤维横截面积稍有下降,但变化不明显。注射生长激素4周后,安静组和运动组均显著增加,且安静注射组大鼠的肌纤维横截面积显著高于运动注射组。3)运动组及运动注射组骨骼肌IGF-I明显升高。安静注射组及运动注射组血清IGF-I明显升高,运动组无明显变化。4)各组肌肉总蛋白含量有所增加,分别为安静注射组升高4.77%、运动组升高31.13%、运动注射组升高28.06%。5)运动组及运动注射组腓肠肌ATP酶活性升高。结论:1)8周耐力运动明显促进大鼠骨骼肌蛋白质合成,同时增加了骨骼肌IGF-I水平。2)外源性rhGH注射4周后,大鼠骨骼肌细胞形态产生肥大,骨骼肌肌纤维横截面积明显增加。3)外源性rhGH注射4周可以显著提高血清和骨骼肌IGF-I水平,且骨骼肌总蛋白的含量变化与骨骼肌IGF-I的变化趋势平行。4)外源性rhGH注射4周可以对肌纤维类型及分配产生调节作用,从而改变肌肉代谢酶活性。     

对“自由女性”的诉求——《金色笔记》中安娜形象分析

多丽丝·莱辛的代表作《金色笔记》刻画了众多栩栩如生的女性形象.作为主角的安娜,其形象承载着作者诸多思考和愿望.分析她的形象有助于加深对小说内涵的理解.安娜对于“自由女性”身份的诉求有一个变化的过程,即由朦胧到自觉,由退缩到无畏,由思想到实践,终于能够确证自己个体力量和女性存在的权利,并在某种程度上为新女性定义了“自由女性”身份的内涵.     

西夏书籍装帧设计及其历史文化因素探论

西夏是历史上与宋代同时期存在的民族政权,通过不断对中原汉族文化和藏族文化以及其他外来文化因素的模仿借鉴,逐渐使本民族的书籍装帧设计达到成熟,无论在书籍的封面设计还是插页排版以及装帧类型上,中古时期的西夏经卷文书和世俗书籍都显示出多种文化因素融汇交流的艺术特征。     

基于序列及结构特征的固有无序蛋白—核酸相互作用位点预测分析

固有无序蛋白是一类具有柔性结构的蛋白质,许多情况下通过与其它物质相互作用形成稳定结构来发挥重要生物功能.本文分别利用基于序列特征和结构特征的蛋白质结合位点预测程序对固有无序蛋白有序区和无序区与核酸分子的结合位点进行了预测分析.结果发现,基于结构特征的结合位点预测方法整体上要优于基于序列特征的预测方法,表明无序区尽管缺少稳定空间结构,结构特征依然在固有无序蛋白结合位点中发挥了重要作用.因此,可以为今后固有无序蛋白序列特征及结构特征的提取提供可靠依据.