用“钻石”教学模型打造面向未来的分析化学课程教学创新实践

为了提升学生的自主学习能力,分析化学课程教学团队构建了“钻石”教学模型,围绕教学目标.课程考核、知识传输途径三个层面,从学习目标、学习场景、学习内容、学习活动和学习结果评价五个要素开展教学创新实践。教师在教学中融入课程思政元素,充分利用现代信息技术,引入最新学术成果.并将课程知识与生活实际紧密联系起来,真正做到了以学生的发展为中心,实现了探究知识、提升能力和提高素养的目标。     

以学生为中心的物理化学课程教学

阐述了以学生为中心的物理化学课程教学方法的必要性。教学中采用师生双向互动的课堂教学方法以及合作学习和学生主动学习方式进行课程教学。实践表明,以学生为中心的课程教学,增强了学生学习物理化学的兴趣,显著提高了教学质量。     

“课程思政”导向下《药物化学》线上线下混合式教学实践探索

在药学专业核心课程中进行思政教学是现行课程思政的主要组成部分。药物化学是药学专业的专业核心课程,课程内容丰富、涉及知识面教广,授课与学习存在一定的难度。丰富的学习内容为课程思政的教学改革提供了较多素材与嵌入点,为课程思政的开展提供了改革的土壤和较好的条件。为了更好地在药物化学课程学习中开展课程思政教学,笔者通过在超星尔雅网络教学平台将课程思政结合《药物化学》线上线下混合式教学进行教学实践,期望实现专业核心课程教学与课程思政教学同向而行,通过多种教学手段和方法让社会主义核心价值观深入课堂,培养符合新时代社会发展的具有崇高思想品质和专业水平的优秀大学生。     

《有机化学》混合式学习的教学实施

在高等教育信息化逐步深入的背景下,混合式学习正在为高校教学改革提供一种新的思路和方法。以有机化学课程为例,针对该课程的特点和存在的问题,阐述了在日常教学中使用混合式学习的必要性,并从课程导入、教学活动组织实施、学习支持和教学评价等几个方面对其进行了研究。     

OBE教育模式在《环境影响评价》课程教学中的应用研究

分析了当前 《环境影响评价》 课程教学中存在的主要问题,将OBE教育模式的成果教育理念应用于 《环境影响评价》课程教学中,从教学目标、教学方式和考核方式三个方面分析和探索了课程改革,教学目标强化职业需求,从学习成果需求反向设计教学目标,教学方式强调以学生为主体,从被动式教学转变为主动式学习,考核方式突出过程评价与个性化...     

基于材料类本科学生培养的《纳米材料与纳米技术》课程优化教学探索

《纳米材料与纳米技术》是一门多学科交叉的课程,具有前沿性和功能性较强等特点。针对本校该课程教学过程中存在学生学习主动性不强、学习效率低和知识点混乱等各种问题,本文探索了对该课程教学过程的优化,具体体现在教学内容、教学手段和课程考核的优化,总结出适用于当前课程教学的经验和手段,从而达到提升课程教学效果的目的。     

适应水分析化学课程教学改革探索

水分析化学课程和有些专业课程都是很重要的专业知识基础课程之一。在现阶段个别学院在水分析化学课程教学中存在有些问题,总结水分析化学课程教学中的规律和特点,从调整教学知识体制、改变教学方法、创新考试模式等这几个方面对改学科课程教学革新进行了探索,解决目前大学生学习动力不足的问题,激发学生的内在学习潜能,改善课程教学效果,提高学生综合能力。     

在大学化学教学中提高学生的学习兴趣

大学化学课程是一门综合性课程,涉及物理化学、有机化学、无机化学和分析化学等学科的理论知识。从重视绪论课、改革教学方法、理论联系实际、发挥学生学习的积极性、提高自身教学素质等方面,详细探讨了在大学化学教学中如何提高学生的学习兴趣。这些实践不仅适用于大学化学的教学,也可以为其他课程教学提供一定的理论指导。     

“超星学习通”辅助“仪器分析”课程思政教学初探

基于“仪器分析”课程的特点,以“超星学习通”在线平台为载体进行课程思政教学初探。采用线上与线下结合的方式全方位、多层次地将课程思政元素巧妙地融入“仪器分析”课程教育中,利用“学习通”课前推送学习资料和相关思政故事,课中融入思政元素和课后进行讨论并统计详情。教学实践表明,基于“学习通”的混合式教学能有效激发学生学习的自主性,从而达到将知识传授、技能培养和思想引领相结合的教学目标。     

提高学生在物理化学教学中的主动性

物理化学课程是化学化工类专业重要的基础理论课,是一门比较抽象且理论性较强的课程,学生普遍感到难学。在以往的教学过程中,学生的主动性较差。文章从教学目标、教学内容、教学方法等方面入手,探讨了如何提高学生在《物理化学》课程教学中的学习兴趣、自学能力和学习主动性。     

Insect antifeedant properties of anthranoids from the genusVismia

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008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、不饱和聚酯树脂、环氧树脂)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.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006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生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。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（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。