浅谈转型发展背景下无机化学实验教学改革

无机化学实验是化学类专业本科生的第一门专业实验课。为了适应应用型人才培养的目标,针对无机化学实验教学中存在的问题,结合学校和专业特点,从教学内容、教学模式及考核方式三个方面对无机化学实验课程教学进行了探索,结合多本教材及地方实际,合理安排教学内容,改进教学方法,加强基本技能教学,采用多种模式提升学生创新能力,以期适应高校转型发展的要求。     

浅谈如何提高本科无机化学教学效果

无机化学通常是本科院校化学或化工专业的第一门专业课,学生对无机化学知识的掌握不但影响本学科,还必然影响对后续化学专业课的学习。文章主要从拓展教学内容、活跃课堂气氛、丰富教学手段和考核方式等几个方面探讨了提高本科无机化学教学效果的方法。     

农科专业基础化学实验教学新模式研究

高等院校农科专业开设无机化学、有机化学、物理化学和分析化学等基础化学理论课程,而其相对应的实验就是基础化学实验课.然而,当前农科专业基础化学实验教学存在诸多问题,如教学地位不匹配、教学目标分散、教学方法、教学过程和评价方式单一、教学资源有待增加等.针对上述问题,将基于新农科建设需求,急需对农科专业基础化学实验教学进行改...     

应用型本科院校无机化学实验教学改革研究

无机化学实验是应用型本科院校的化学化工专业学生的第一门实验课程。传统的无机化学实验教学在教学内容、教学方式等存在一些问题,阻碍学生能力提升。近几年我们根据无机化学实验的教学特点和社会的需求,对无机化学实验在教学方法和教学内容上以及考核方式深化改革,夯实学生实验的操作规范与培养学生的探究精神相结合,把教师的科研延伸至无机化学实验的教学,提高学生的科研创新能力,培养出的学生基本功扎实,富有创新能力。     

药物化学专业全英文无机化学教学探索

全英文教学是专业人才国际化培养的重要手段,也是应对国内国外学生共同学习和沟通的有效措施。以药物化学专业无机化学课程为主体,从教学内容、教学策略及教学考核3个方面来阐述药物化学专业无机化学课程全英文教学的具体内容。     

基于应用型高校无机化学实验改革探索与实践

文章首先简要介绍了无机化学实验对化学专业类学生的重要性,然后对实验教学中存在的一些问题进行了总结。最后从推行"实验演示型微课"教学模式、强化绿色化学教学、部分开放实验室、完善科学的实验课考核方式和传统课堂教学与多媒体教学相结合五个方面提出了无机化学实验教学改革的设想,并进行了探索与实践。     

高职《无机化学》课程教学改革的实践探索

结合高职《无机化学》教学实践体会,针对“无机化学”课程的特点,对教学理念、教学内容、教学方法和考核方式等几个方面的改革进行了探讨。提出了培养适合企业和社会需求的人才教学理念、教学方法和考核方式,为高职《无机化学》教学改革提供理论指导。     

地方本科院校无机化学教学中的问题及解决方案

无机化学是本科院校化学化工等相关专业的一门必修专业课,是其他专业的重要基础。地方本科院校教学过程中任然存在教学方法落后、教学手段单一等问题。本文接合当前无机化学的特点,在教学内容、教学方式、考核体系等方面进行积极探讨。通过教学改革,促进师生互动交流,培养学生良好的学习习惯,提供轻松的学习环境,提高教学效果。     

浅谈面向海洋化学专业开设的 《无机化学》 课程

无机化学作为大学化学的经典课程,衔接高中化学和大学化学,知识体系庞大,涵盖面广,是化学类专业必须开设的基础专业课程。在海洋化学蓬勃发展的背景下,该专业的无机化学课程应高度贴合学科发展需要。针对目前海洋化学专业无机化学课程教学中存在的问题,提出通过改革教学模式、优化教学内容、开设具有专业特色的综合性实验等方面,更好的服务于海洋化学专业的发展。     

染整技术专业《无机化学》实验教学方法探索

《无机化学》实验是染整技术专业的必修课程,在具体教学实践基础上,针对染整技术专业高本衔接《无机化学》实验课程教学中存在的难以理解和没兴趣的问题,提出激发学生学习积极性和主动性的措施和方法;同时,针对该专业《无机化学》实验教学过程生动化和教学目的明确化进一步探索,进一步提出课程考核过程中要加强平时成绩的考核,以期提高教学质量。     

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。