以教考分离促《有机化学》教学质量的提高

《有机化学》是高职化工类专业的专业基础课,结合有机化学的课程特点,针对教学中存在的一些问题,对课程实施了三年教考分离的实践,通过实践,学生的学习动力和积极性得到了提高,对基础知识的理解和掌握更牢固,考试通过率从62%提高到75%。本文分别就研究目标、内容、思路和研究方法进行了阐述,以期为高职《有机化学》教学改革提供思路。     

高等物理化学课程前沿导向的模拟探究教学法

在高等物理化学研究生课程的教学过程中,紧密结合化学及其相关学科的发展前沿,采取一种"情景—任务—资源—途径—结论—展示"的六段式模拟探究课堂教学方法(ST3RS),使本专业的研究生能进一步系统、深刻地理解和掌握物理化学的基本理论和研究方法,并能在实际的科研工作中加以创新应用。在这种模式下,教与学的界限不再那么分明,师生一起体验创新的行为,体验创新的乐趣。实践证明能取得很好的教学效果。     

Catalytic upgrading of bio‐oils by esterification

Biomass is the term given to naturally‐produced organic matter resulting from photosynthesis, and represents the most abundant organic polymers on Earth. Consequently, there has been great interest in the potential exploitation of lignocellulosic biomass as a renewable feedstock for energy, materials and chemicals production. The energy sector has largely focused on the direct thermochemical processing of lignocellulose via pyrolysis/gasification for heat generation, and the co‐production of bio‐oils and bio‐gas which may be upgraded to produce drop‐in transportation fuels. This mini‐review describes recent advances in the design and application of solid acid catalysts for the energy efficient upgrading of pyrolysis biofuels. © 2015 Society of Chemical Industry     

我国棉精梳新产品的开发现状

随着高效能精梳机的技术进步与迅速推广，精梳新产品的开发日新月异。介绍了不同天然纤维纺精梳系列(包括植物纤维和动物纤维)、涤棉混纺精梳系列、纤维素纤维与棉混纺精梳系列，转杯纺精梳系列、双精梳纺精梳系列中的纤维性能、应用原则及工艺设计要点。     

A remarkable increase in the adsorbed H2 amount: Influence of pore size distribution on the H2 adsorption capacity of Fe-BTC

Here we show the crucial role of ultramicropores on the adsorbed H₂ amount. By synthesizing Fe-BTCs via a perturbation assisted nanofusion synthesis strategy and by the control of textural porosity via Fe:BTC ratio, BET surface area (1312 m²/g), total pore volume (1.41 cm³/g), and H₂ adsorption capacity (1.10 wt% at 7.6 bar and 298 K) were enhanced by 1.6, 3.1, and 2.6 times, respectively. The reported BET surface area, and the total pore volume are the highest of those reported for Fe-BTC, to date. The enhanced H₂ adsorption capacity of Fe-BTC-3 is attributed to the ultramicropores present in its pore structure. Presence of ultramicropores maximizes van der Waals potential, and the adsorbed H₂ amount increases. By the perturbation assisted nanofusion synthesis strategy and the control over textural porosity, an Fe-BTC that possesses a H₂ adsorption capacity higher than those of reported MOFs with higher BET surface areas has been reported.     

Performance characteristics of nonequilibrium MHD generator with fully ionized seed and enlargement of stabilized region

The applicability of the stabilized region based on ‘fully ionized seed regime’ is theoretically studied for a nonequilibrium Faraday MHD generator. Potassium-seeded argon plasma at 1500 K and 1 atm is assumed as the working gas. The calculation results show that higher electrical efficiency will become possible by using this regime. However, a danger of dynamical instability such as larger power fluctuation is brought about by a small change of seed density or gas pressure. To insure the validity of fully ionized seed regime, the enlargement of the stable region is considered. The applied current parallel to magnetic field successfully enlarges the stable region with fully ionized seed, and this fact allows us to reduce the possibility of the dynamical instability. The applied current scarcely decreases the electrical efficiency or net output power of the generator if the current density is equal to or less than that in Faraday electric field direction.     

食品中多氯联苯分析前处理技术进展

样品前处理是食品中多氯联苯分析的关键步骤,近几年在食品中多氯联苯的提取、净化和分离方面出现了一些新技术。超临界流体萃取、微波辅助提取、加速溶剂萃取等使样品的提取时间缩短并减少了溶剂用量。自动净化装置以及新型高效液相色谱柱等新的净化、分离手段使这一过程大为简化。     

工科专业《无机及分析化学》理论教学改革初探

《无机及分析化学》课程是工科专业大一学生重要的一门基础化学课程,基于其重要性,本文从教学内容、教学手段、教学方法及考核方式四个方面来探讨无机及分析化学理论课程的教学改革,有利于提高教学效果,培养高素质、创新性技术人才。     

物理化学实验教学对学生创新能力培养的探讨

分析了当前物理化学实验教学在学生创新能力培养方面的现状与不足,对如何开展综合设计实验培养学生创新能力的若十问题进行了讨论.指出恰当选择综合设计实验内容,建立科学考核办法可以极大地促进学生学习的积极性和主动性,培养学生的创新能力.