数字化实验与高中物理教学的关系简介

现行《普通高中·物理课程标准》明确指出：“重视将信息技术应用到物理实验室．加快中学物理实验软件的开发和应用,诸如通过计算机实时测量、处理实验数据、分析实验结果等。”本文简单地介绍数字化实验系统及其在中学物理教学中的应用,希望能够与广大同仁共同学习。     

从翻译的角度讨论日语中的特殊助数词隐喻现象

不论是在汉语或日语中,隐喻这一修辞手法都经常使用。在翻译过程中如何处理好隐喻句的翻译是十分重要的。本文在叙述和解释日语中特殊助数词中所含有的隐喻现象基础上,提出在翻译方式上应注意直译、替换、意译所使用的场合和特点。     

论现代城市环境雕塑艺术的审美特征

生活质量的不断提升,城市建设的快速推进,人们对生活环境也提出了新的要求,不仅仅表现在物质环境上,同时对精神的生活环境也提出希冀。合理、适当地布置一些环境雕塑艺术作品,它能够有效地提升城市的品位和精神内涵。文章从意象、材料、主题内容、尺度等方面对城市雕塑艺术的审美特征作出简要的分析、研究,让城市环境雕塑艺术在现代城市环境的建设中发挥出本身所具备的审美价值。     

中美建筑学硕士研究生课程设置比较

课程设置在硕士研究生培养过程中处于重要地位,直接关系着硕士研究生的培养质量。本文基对我国高水平大学建筑学硕士研究生课程设置的分析,结合与美国建筑学硕士研究生课程设置的比较,进而找出我们课程设置中的不足之处。     

谈数学解题中常用的几种解题方法

笔者根据从事多年的数学教学经验,从特例法、排除法、数形结合的思想、分类讨论的思想、化归与等价变换的思想、函数与方程的思想等方面来谈谈数学解题中常见的几种思想与方法。     

试论美术课堂中的探究性学习

美术教学强调加强自主体验探究的学习,目的就是让学生自己去发现问题,自觉主动地探索问题并解决问题。教师要为学生提供自由表达、质疑、探究、讨论问题的机会,学生通过个人、小组、集体等多种形式的解难释疑尝试活动,发挥学生的主体性和主动精神。美术教育不再是传统的＂授之以鱼＂,而是使学生获得自主探究体验,从而形成自主探究的意识,培养自主探究的精神和提升自主探究的能力。     

Microfluidic wet spinning of chitosan-alginate microfibers and encapsulation of HepG2 cells in fibers

The successful encapsulation of human hepatocellular carcinoma (HepG2) cells would greatly assist a broad range of applications in tissue engineering. Due to the harsh conditions during standard chitosan fiber fabrication processes, encapsulation of HepG2 cells in chitosan fibers has been challenging. Here, we describe the successful wet-spinning of chitosan-alginate fibers using a coaxial flow microfluidic chip. We determined the optimal mixing conditions for generating chitosan-alginate fibers, including a 1:5 ratio of 2% (w∕w) water-soluble chitosan (WSC) solution to 2% (w∕w) alginate solution. Ratio including higher than 2% (w∕w) WSC solution increased aggregation throughout the mixture. By suspending cells in the WSC-alginate solution, we successfully fabricated HepG2 cell-laden fibers. The encapsulated HepG2 cells in the chitosan-alginate fibers were more viable than cells encapsulated in pure alginate fibers, suggesting that cross-linked chitosan provides a better environment for HepG2 cells than alginate alone. In addition, we found that the adhesion of HepG2 cells on the chitosan-alginate fiber is much better than that on the alginate fibers.     

Bromo-oxidation reaction in enzyme-entrapped alginate hollow microfibers

In this article, the authors present the fabrication of an enzyme-entrapped alginate hollow fiber using a microfluidic device. Further use of enzyme-entrapped alginate hollow fibers as a biocatalytic microchemical reactor for chemical synthesis is also deliberated in this article. To ensure that there is no enzyme leaching from the fiber, fiber surfaces were coated with chitosan. To confine the mobility of reactants and products within the porous hollow fibers the entire fibers were embedded into a transparent polydimethylsiloxane (PDMS) matrix which also works as a support matrix. A vanadium-containing bromoperoxidase enzyme isolated from Corallina confusa was used as a model enzyme to demonstrate the use of these alginate hollow-fiber reactors in bromo-oxidation of phenol red to bromophenol blue at different dye flow rates. Stability of the entrapped enzyme at different temperatures and the effect of the chitosan coating on the reaction conversion were also studied. It was observed that molecules as big as 27 kDa can be retained in the matrix after coating with chitosan while molecules with molecular-weight of around 378 Da can still diffuse in and out of the matrix. The kinetic conversion rate in this microfluidic bioreactor was more than 41-fold faster when compared with the standard test-tube procedure.     

Can self-esteem protect against the deleterious consequences of self-objectification for mood and body satisfaction in physically active female university students?

Using objectification theory (Fredrickson & Roberts, 1997), this study tested the interaction between self-objectification, appearance evaluation, and self-esteem in predicting body satisfaction and mood states. Participants (N = 93) were physically active female university students. State self-objectification was manipulated by participants wearing tight revealing exercise attire (experimental condition) or baggy exercise clothes (control condition). Significant interactions emerged predicting depression, anger, fatness, and satisfaction with body shape and size. For participants in the self-objectification condition who had low (as opposed to high) appearance evaluation, low self-esteem was associated with high depression, anger, and fatness and low satisfaction with body shape and size. In contrast, for participants with high self-esteem, these mood and body satisfaction states were more favorable irrespective of their levels of appearance evaluation. For female exercisers, self-esteem-enhancing strategies may protect against some of the negative outcomes of self-objectification.