Strength training

Introductory textbooks commonly state that Golgi tendon organs (GTOs) are responsible for a reflex response that inhibits a muscle producing dangerously high tension (autogenic inhibition). Review of the relevant data from animal studies demonstrates that there is wide variability in the magnitude of, and even the presence of, GTO autogenic effects among locomotor hindlimb muscles, and that data on GTO effects under conditions of voluntary maximal muscle activation are lacking. A single available study on GTO function in humans, during a moderate contraction, surprisingly shows a reduction in autogenic inhibition during muscle‐force production. Further, it is not possible to find experimental evidence supporting the idea that strength training may produce a decrease in GTO mediated autogenic inhibition, allowing greater muscle activation levels and hence greater force production.     

The Effects of a Single Reminder Trial on Retention of a Motor Skill

Two experiments investigated the effects of a single reminder trial on immediate and delayed retention. Experiment 1 determined if beneficial effects of a reminder trial were a function of task order. Immediate retention performance benefited only when the reminder trial was practiced in the first block of trials. Experiment 2 added a 24-hr delayed retention test to examine the long-term benefits of a reminder trial. Retention performance was enhanced over both delay intervals. The long-term effect extended previous research (Shea & Titzer, 1993) that documented effects after 10 min. The use of a single reminder trial established that intertask comparisons between multiple reminder trials were not a precondition for the reminder trial effect as postulated by Shea and Titzer.     

芒果树叶提取物对A3钢在酸性介质中缓蚀性能的研究

分别用浸泡法、加热回流萃取法从芒果树叶中提取天然缓蚀剂,并采用失重法、极化曲线法研究各种方法的提取物在室温下酸性介质中对A3钢的缓蚀性能。实验结果表明,两种方法所得植物缓蚀剂均属于混合型缓蚀剂,其中加热回流萃取法所得缓蚀剂缓蚀效果较优,缓蚀率最高可达90.11%。     

海金沙提取液抑制草酸钙结石的化学基础研究

文中采用体外模拟方法研究了海金沙提取液对草酸钙结石的影响,用X射线衍射、红外光谱、扫描电子显微镜等对结果进行了表征．研究表明,海金沙提取液可以抑制COD晶体向热力学更稳定态的COM晶体转变,这种抑制作用随海金沙提取液浓度增大而增大,且COD晶体尺寸随着海金沙提取液浓度的增大而减小,这有利于抑制草酸钙结石．     

Continuance intention in gamified mobile applications: A study of behavioral inhibition and activation systems

This study seeks to investigate the effects of Behavioral Activation System (BAS), known as approach motivation, and Behavioral Inhibition System (BIS), known as avoidance motivation, that are expected to influence individuals’ post-adoption behaviors in gamified mobile applications. A survey-based research methodology was used, and the impacts of BAS and BIS on Information Systems Continuance are examined. The results show that reward responsiveness has the most significant effect on user satisfaction and continuance intention. Fun-seeking plays an essential role in continuance intention; however, it does not significantly affect satisfaction, as drive does not affect either satisfaction or continuance intention. BIS has a significant and negative effect on individual satisfaction, but no effects were found related to continuance intention. The findings of this study improve the understanding of the differences between these motivations related to Information Systems Continuance. Significant practical implications that gamified mobile application developers can adopt are proposed.     

近二十年国内有意遗忘的研究综述简

通过文献资料对近二十年国内有意遗忘进行了综述.有意遗忘的编码理论、提取抑制理论、区分抑制理论对有意遗忘产生的机制进行解释.在有意遗忘的发展性研究中发现有意遗忘的认知抑制能力是后天发展而来的,并且随着年龄的增大而逐渐发展起来.在影响因素方面发现测验方式、测验难度以及测验的材料等都是影响被试测验成绩的因素.另外,随着有意遗忘研究的深入,有意遗忘研究范式可以作为一种新的研究方法运用到错误记忆、自我参照效应以及情绪等的研究中,研究范式和方法的创新,促进有意遗忘研究领域的不断拓展.     

Kinetics of Inhibition of Monoamine Oxidase Using <Emphasis Type="Italic">Cymbopogon martinii</Emphasis> (Roxb.) Wats.: A Potential Antidepressant Herbal Ingredient with Antioxidant Activity

The study was designed to evaluate the antioxidant activity and effect of Cymbopogon martinii (Roxb.) Wats. (Poaceae) leaves on the activity of monoamine oxidase and kinetics of enzyme inhibition. Ethanol extract of C. martinii and rat brain mitochondrial monoamine oxidase preparation ware used to study the kinetics of enzyme inhibition using double reciprocal Lineweaver–Burk plot. The DPPH was used as a source of free radical to evaluate antioxidant potential. It is observed that, the ethanolic extract of C. martinii inhibits the monoamine oxidase activity with competitive mode of inhibition. The V _max (0.01 mM/min) remained constant while, K _m varied from 21.00 ± 1.1, 43.33 ± 1.5 and 83.33 ± 1.4 mM for 100–500 μg/ml concentration of C. martinii. The K _i values were calculated to be 90.00 ± 0.87, 75.00 ± 0.69, 68.18 ± 0.68 μg for 100–500 μg/ml concentration of C. martini. It also shows a significant DPPH (1,1-diphenyl-2-picryl hydrazine) radical scavenging (IC₅₀ = 0.34 ± 0.05 mg/ml) and reducing activity (IC₅₀ = 0.70 ± 0.22 mg/ml). The C. martini can be considered as a possible source of MAO inhibitor used in the treatment of depression and other neurological disorders.     

浅谈教师考评制度对青年教师成长的影响

随着教育院校规模飞速发展,青年教师队伍所占比重大幅提高,已经成为高职院校教师队伍中一支十分活跃的生力军,是学校内教学、科研和行政管理的重要力量.教师考评制度的好坏将会直接影响到青年教师未来的成长与发展,积极合理的考评制度会激励青年教师的前进:相反的,不公平、存在弊端的考评制度则会极大抑制青年教师的进步.在本文中,笔者将就目前考评制度的优缺点进行分析,并提出合理的改进意见.     

有意遗忘研究的新视角：认知抑制能力

有意遗忘是人类的一种重要机能,随着认知抑制研究的兴起,对有意遗忘中认知抑制能力研究的也比较多。在提出有意遗忘中认知抑制的编码理论和提取抑制理论的基础上,阐述了认知抑制的发展,即对于儿童和青年个体,有意遗忘的抑制能力随年龄的增长而增加。并指出了该研究的未来发展趋势。     

2-巯基苯并噻唑三元复合缓蚀剂对碳钢的缓蚀作用

首先研究了2-巯基苯并噻唑（MBT）缓蚀率与其浓度的关系,选用碘化钾（KI）和硫脲（TU）与之进行了三元复配,并通过极化曲线和电化学阻抗研究了三元复合缓蚀剂的缓蚀机理,最后进行了热力学分析。实验结果表明,MBT,KI和TU三元复合缓蚀剂其浓度最佳配比为1：2：2;总浓度为250 mg/L时,在最佳配比下,缓蚀率可达97.7%;三元复合缓蚀剂是以抑制阳极溶解反应为主的混合型缓蚀剂,在碳钢表面的吸附符合Langmuir等温吸附模型。