化工实验大赛对化工原理教学的影响

化工原理是一门化工类相关专业重要的专业课程，其教学质量对学生培养至关重要。参加化工实验大赛，有助于强化学生的综合能力和意识，提升教师的专业素质和能力，同时也能促进学校企业间的交流，推动高校化工学科的建设，从而深刻影响化工原理教学质量。探讨了参加化工实验大赛对化工原理教学的影响，并倡导学生、教师和校企，尤其是青年教师，积极参与化工实验大赛。     

关于加强化工过程分析与合成实践教学的几点想法

知识、能力、素质综合发展型人才的质量评价标准的核心是素质。在化工类学生素质教育的过程中,实践教学发挥着极其重要的作用。化工过程分析与合成是一门综合的化工专业课程,主要对化工生产过程进行模拟和优化。在教学过程中加强实践教学对于提高学生对课程的理解,了解书本知识如何运用,掌握对化工过程进行分析和评价的方法,进而提出合理的优化方案具有非常重要的意义。     

化工原理课程设计教学改革与创新教育研究

化工原理课程设计是以化工单元操作为主的一次工程设计,是化工类学生进行的第一次化工设计的基本训练,它对于培养学生独立工作能力和创新能力、深化与升华学生所学的知识和检验学生综合素质与工程实践能力起着非常重要的作用。因此,如何提高化工原理课程设计质量,培养学生的工程意识和工程设计能力,对提高学生的实践能力和创新思维有着重要的意义。     

化工原理教学中构建“三个能力”教学平台的研究

化工原理是化工类及相关专业学生必修的一门专业技术基础课。它包括理论课、实验课和课程设计三个教学环节。在化工原理课程教学中,构建提升学生“三个能力”的教学平台9就是以提高学生综合素质为目标,针对性地选择和创造教育模式,将化工原理课程与提高学生计算机应用能力、专业英语应用能力及创新思维能力进行适应性匹配,     

基于应用型人才培养的化工原理教学方法探讨

《化工原理》是化工及化工类相近专业的一门重要的技术基础课,它起着由基础课向专业课过渡的"桥梁"作用。根据化工原理的特点及应用型学生的基础和培养目标,本文从教学内容、教学方法和教学手段等方面对化工原理教学进行了探讨,紧密结合生活生产实例强化教学,充分激发学生的求知欲望,提高学生的综合素质和创新能力。     

化工类专业课程“课程思政”策略的研究与实践

在高职院校化工类专业课程教育教学过程中,把思想政治元素融入日常教育活动是提升化工类专业学生思想道德素质的必经之路。本文以"把培育和践行社会主义核心价值观融入教书育人全过程"作为根本目标及出发点,通过分析课堂教学因素,专业课教师的素质等,研究了化工类专业课程思政教育改革思路,根据专业课程的特点提出了相应教学过程中的思政教育模式和方法。     

化工原理实验中提高学生综合素质和创新能力

化工原理实验是化工类专业一门重要的专业基础课。为了加强实验教学环节,结合教学实践,对实验教学内容、教学模式、实验教学管理和科学考核体系等方面进行改革和实践,提高了学生综合素质和创新能力。     

制药工程专业化工原理课程教学探讨

化工原理课程是制药工程专业基础课程与专业课程之间的过渡桥梁,然而由于该专业的特殊性,并不像其它化工类专业一样与化工原理课程紧密结合,学生在学习过程中往往存在困惑、积极性不高、敷衍式学习等现象,本文针对制药工程专业的特点,结合化工原理的教学经验,对该专业化工原理的综合教学模式进行了探讨。     

全优教学法在化工原理教学中的应用

化工原理课程是化工类重要的技术基础课,文章论述了在化工原理理论课程教学中应用全优教学法,以工程设计为指导思想,采用工程观点、工程方法和工程理论来研究问题,不断提高教师素质,实现提高学生的学习兴趣,,培养学生的专业素质及学生的创新能力的体会。     

浅谈提高学生化工原理学习效果

化工原理是化工类各专业的技术基础课,在基础课与专业课之间起着承前启后、由理及工的桥梁作用。化工原理的学习效果与后续专业课程的学习密切相关。笔者结合自己的教学,从理论教学、实验教学、课程设计三个方面探讨如何提高学生的学习效果。     

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。