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本课题旨在研究基于超星泛雅平台开展TBL结合LBL在《药物合成反应》课程的混合教学模式改革的应用及效果。选取湘南学院2014级药学本科学生93名,结合超星泛雅网络学习平台运用TBL+LBL双轨教学,主要通过课前预习、个人测试、小组测试、课后练习等教学方式,研究结合网络教学平台进行TBL+LBL教学模式对《药物合成反应》学习的积极性。结果发现利用超星泛雅学习平台进行TBL+LBL双轨教学法显著提升了学生自我学习的能力,有利于提高《药物合成反应》教学效果。 相似文献
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《山东化工》2020,(16)
有机化学在制药工程专业中具有举足轻重的作用,但由于该课程涉及内容广泛,化学反应多,机理多且复杂,理论抽象,导致有机化学教学活力有限。为提升制药工程专业有机化学基础能力,我校突破单一教学模式桎梏,整合设计LBL-CBL-PBL-RBL-TBL协同教学模式:以教师为主导传授系统知识体系(LBL),并结合实际案例辅助教学(CBL),激发学生学习兴趣;同时,以学生为主体提出问题(PBL),结合教材及多媒体查阅相关文献资料(RBL),分组合作进行分析讨论(TBL);此外,在有机化学实验教学中,建立相关实验问题库(PBL),分小组完成实验操作和实验结果分析(TBL)。这种多样化教学模式相结合,不仅增强了学生的主观能动性,而且培养了学生的思考能力、动手能力、创新能力、团队合作能力等。 相似文献
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医专生物化学PBL与LBL相结合的教学探索 总被引:1,自引:0,他引:1
基于问题的教学法(PBL)以问题为中心,有助于提高学生应用知识解决问题和自主学习的能力。但它不便于系统完整地掌握学科知识,且对学生、教师和学校都有较高要求。传统的基于授课的教学法(LBL)便于系统、完整地习得知识。但在培养学生知识应用能力及自学能力等方面存在不足。PBL与LBL具有互补性,二者不能替代,应该融合。 相似文献
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Dinesh Singh J. K. Gehlawat Musti S. Rao 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1990,47(2):127-136
Oslefins and diolefins are important intermediates in the petrochemical industry and the future promises a further substantial increase in demand. While several catalysts have been formulated in the past for the abstraction of hydrogen from butenes and propylene, these catalysts are inefficient in the abstraction of first hydrogen from butane. Bismuth molybdates (β and γ-phases) containing iron oxide and supported on alumina are used as catalysts in the present investigation on the oxidative dehydrogenation of n-butane. Effects of catalyst content, temperature and oxygen: n-butane ratio on conversion and selectivity to butadiene and (C4H8 + C4H6) are studied in the following ranges of experimental conditions: β-bismuth molybdate/100 mol support I(K), 3–9; γ-bismuth molybdate/100 mol support I(K), 5-20; temperature, 400–500°C; O2: butane ratio, 0.6:1.7. 相似文献
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A viscometer used to measure the viscosity of 10 μl of a liquid, must be miniaturized down, and the liquid velocity gradient in the channel used to determine the viscosity coefficient. Two major factors that affect the liquid velocity are the mechanical forces exerted by the mechanical motors and electromagnetic forces. In this study, electrowetting on dielectric (EWOD) is adopted to drive liquids. Variously sized electrodes on a chip, and two shapes of channel are employed to measure the velocity gradient to determine the viscosity coefficient. The device is fabricated by microelectromechanical system (MEMS) technology. The dielectric layer used in EWOD has a high dielectric constant, BST (Ba0.7Sr0.3TiO3), to reduce the required applied voltage; its surface is coated with hydrophobic polymer, polytetrafluoro-ethylene (PTFE, Teflon® AF DuPont). Experimental results demonstrate that liquids can be pulled at 660 μm/s in linear channels by applying a voltage of 15 V. 相似文献
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考登钢作为一种高耐候结构钢,广泛应用于各个领域。在火力发电方面,考登钢主要应用在工作环境比较恶劣的烟气加热器和空气预热器中。考登钢表面涂搪的目的就是进一步提高其耐腐蚀性能,延长使用寿命。为了提高考登钢元件的使用寿命,对考登钢表面涂搪瓷的可行性、密着性能、瓷釉、工艺控制、质量保证等方面进行了研究。 相似文献
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In reexamining medium effects on photochemical reactions, we have emphasized those on unequilibrated excited species such as the Franck-Condon species. Despite recent advances in femtochemistry, such a discussion in molecular photochemistry is uncommon, and the problem remains challenging on account of the extremely short-lived excited species. However, in such cases, a small perturbation resulting from, for example, weak guest-host interactions could turn into a determining factor in dictating the course of a photochemical channel of deactivation. Examples of medium-directed diabatic processes have been examined with this idea in mind. A modified view on rhodopsin photoisomerization is presented along with the consideration that confinement does not necessarily lead to inhibition of reactions of the trapped substrate. 相似文献
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研究了温度和pH值对漆酶酶活以及漆酶处理纤维压制纤维板性能的影响。结果表明,pH较低、温度较高时漆酶酶活较高,压制的纤维板强度性能较好。但温度太高(60~80℃),延长加热时间,漆酶稳定性变差,酶活明显降低,压制纤维板的强度下降。 相似文献
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采用密度泛函理论(DFT)考察了丙烷在Pt(111)表面上脱氢生成丙烯的反应机理。通过在Pt(111)面上预吸附一定数量H原子模拟共吸附H对丙烷脱氢过程的影响。结果表明:H共吸附能降低丙烷及其脱氢产物的吸附能,促进丙烯脱附,有利于提高丙烯的选择性;H共吸附会导致丙烷脱氢能垒变大,降低催化剂的脱氢活性;共吸附的影响随着H覆盖率增加而增大。 相似文献