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固体废物处理处置工程实验课程是环境工程专业的一门实验必修课,对培养学生主观能动性以及自主创新意识起着重要作用。但目前该实验课程存在一些问题,包括理论与实验教学分割、实验室设备与实际生产设备脱节、实验教学程序化和考核体系不科学等。针对以上问题,提出了建立理论与实验"耦合式"教学模式、形成"实验室-工厂"两地教学机制、开展多元化教学以及优化教学考核体系等教学改革措施,以构建固体废物处理处置工程实验新教学模式。在该教学模式下开展实验教学,可以充分激发学生的探索欲和创新能力,有利于培养"新工科"创新型固体废物处理处置专业技术人才。 相似文献
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以实践创新能力培养为目标,从课程内容、教学模式和成绩考核评价三方面对环境科学专业实验课程教学进行了改革与实践。增加综合性和设计创新性实验的权重,加强不同课程间的协同联系,提升课程内容的整体性和层次性;采用"情境式教学"和"模块化教学";采用包含课前、课中、课后实验全过程的综合评价体系。经过几年的改革和实践,取得了较为满意的效果,提升了学生对实验课程的兴趣和主动性,增加了学生的实践创新能力。 相似文献
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药物合成反应实训是药品生产技术专业的核心实训课程,具有很强的实践性和可操作性。通过典型药物合成反应将课程重点理论和实操要点传授于学生,深入挖掘每项实验中潜在的思政元素并通过启发式教学方式呈现于学生。通过精心流畅的教学设计将命题式和自主设计式实训项目逐次展开实施,充分发挥以学生为中心的教学理念,实现大学生的思想政治教育与专业技能培养相结合、药物合成反应实训课程思政教学与育人相统一的良好教学效果。 相似文献
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实验课程改革是实践教育教学改革的重要组成部分,优秀的实验课程设计对深化理论教学、培养学生创新能力的关键环节有着显著的影响。高等教育游戏化探究学习模式教育是教育改革领域新的研究热点,文章在材料科学与工程专业实验课程的改革过程中,引入"游戏化实验课程设计"理念,从实践教学改革和游戏化学习的设计策略出发,以"3D打印实验"作为案例分析,实验研究结果表明,游戏化探究模式得到了师生的认可,能够有效的激发学生学习的积极性并促进学生能力的发展。同时期望游戏化探究学习模式教育方法能够更好的促进实践教学改革。 相似文献
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It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples. 相似文献
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J. R. Aldrich S. P. Carroll W. R. Lusby M. J. Thompson J. P. Kochansky R. M. Waters 《Journal of chemical ecology》1990,16(1):199-210
Scentless plant bugs (Heteroptera: Rhopalidae) are so named because adults of the Serinethinae have vestigial metathoracic scent glands. Serinethines are seed predators of Sapindales, especially Sapindaceae that produce toxic cyanolipids. In two serinethine species whose ranges extend into the southern United States,Jadera haematoloma andJ. sanguinolenta, sequestration of host cyanolipids as glucosides renders these gregarious, aposematic insects unpalatable to a variety of predators. The blood glucoside profile and cyanogenesis ofJadera varies depending on the cyanolipid chemistry of hosts, and adults and larvae fed golden rain tree seeds (Koelreuteria paniculata) excrete the volatile lactone, 4-methyl-2(5H)-furanone, to which they are attracted.Jadera fed balloon vine seeds (Cardiospermum spp.) do not excrete the attractive lactone. Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation ofJadera to a volatile excretory product could be an adaptive response to save time.Mention of a commercial product does not consititute an endorsement by the USDA. 相似文献
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M. S. J. Simmonds W. M. Blaney F. Delle Monache M. Marquina Mac-Quhae G. B. Marini Bettolo 《Journal of chemical ecology》1985,11(12):1593-1599
Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria. 相似文献
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2008~2009年世界塑料工业进展 总被引:4,自引:1,他引:3
中蓝晨光化工研究院有限公司《塑料工业》编辑部 《塑料工业》2010,38(3)
收集了2008年7月~2009年6月世界塑料工业的相关资料,介绍了2008~2009年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况。按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、环氧树脂、不饱和聚酯树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍。 相似文献
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ICP-MS法测定地球化学样品中As、Cr、Ge、V等18种微量痕量元素的研究 总被引:15,自引:0,他引:15
建立了测定地球化学样品中包括As、Cr、Ge、V等18种微量、痕量元素的ICP-MS方法。地化试样用HF-HNO3混酸分解后,以1 1 HNO3溶解干渣。由于制样不使用盐酸,避免了Cl对As、Cr、Ge、V的质谱干扰。用国家一级地球化学标准物质GBW 07309制备溶液优化仪器工作参数,并用于校准。方法测定限(6s)为:0.007~6.4μg/g,精密度(RSD%,n=12)为:29%~9.4%,经过国家一级地球化学标准物质的分析验证,结果与标准值吻合。方法已应用于国土资源调查的试样分析。 相似文献
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