化学专业英语课程教学改革与实践

化学专业英语是化学专业必不可少的一门课程,是学生继续深造、毕业工作以及查阅科技文献和解决相关课题的基本交流工具。因此,如何高效地向学生传授化学专业英语,是这门课程必须要面对的问题。结合当前化学专业英语教学的存在的现状,文章提出从化学专业英语教学目标、优质教材、教学方法、灵活评定成绩、拓展教学资源和双语教学等方面进行改进措施,以促进化学专业英语的教学能力水平的提高,从而培养高素质人才。     

《化工专业英语》课程教学改革探索与实践

《化工专业英语》是化工专业的一门重要课程,着重培养专业英语实际应用能力。结合课程的教学目的和化工专业人才培养方案,从教学内容、教学方法、考核方式等方面进行了教学改革的尝试与探讨,以提高化工专业英语的教学效果。     

《化学专业英语》多维联动教学模式探讨

化学专业英语是一门建立在大学英语、化学专业核心课程基础上,旨在提高学生在化学专业领域英语应用能力的重要课程。为了使化学专业英语教学更好地适应新形势下化学专业人才培养需要并有效达成人才培养目标,本文在分析当前化学专业英语课程教学现状的基础上,结合讲授化学专业英语的实践,就如何从多维联动角度有效加强课程与课程、第一课堂与第二课堂、教与学互动配合进行尝试和探讨,以期不断提高化学专业英语教学质量,促进学生化学专业素质和语言交流应用能力的全面发展。     

"化工专业英语"教学中的课程思政探索与实践

"化工专业英语"课程是化学工程与工艺专业的一门重要的应用型课程.讨论了"化工专业英语"课程思政建设的必要性,分析了课程思政的教学现状,并对思政元素有机融入化工专业英语课堂教学进行了有益探索和实践,引导学生树立正确的人生观、世界观和社会主义核心价值观,有效实现课程思政的育人目标.     

浅谈地方性院校化学专业英语教学的现状与改革

化学专业英语是化学专业学生一门重要的课程,对学生英语素养和能力的提升具有很大的帮助。本文总结了当前地方性院校中化学专业英语教学中存在的问题,结合多年的实际教学经验,并对这门课程的教学现状做出了研究。从教材改进、教学方法改革、激发学生学习兴趣等方面对该课程的教学提出一些解决方案,探讨了化学专业英语教学改革,希望对该课程的教学能够一定的帮助作用。     

关于化学化工专业英语教学的思考与探索

化学化工专业英语是我院化学化工专业本科生的一门非常重要的专业必修课,课程注重学生英语实际运用能力的培养。文章结合专业英语课程的特点,对教学过程中常出现的问题与难点进行剖析,并结合教师的教学经验,从教材和教学内容的改革、教学模式调整和如何调动学生的学习积极性、创新师资组合和发挥教师特长、注重专业英语课程与科技文献检索课程和毕业设计环节的结合等方面进行了探索和改革,提出了一些中肯的建议。     

矿物加工专业英语教学探讨

矿物加工专业英语是针对矿物加工专业学生开设的一门专业课程,具有比较强的专业性、应用性、增加该专业学生专业文献阅读及专业资料收集的能力。从地方特色、专业特色、我们围绕矿物加工专业英语课程教学内容,进行一系列的切实可行的实践教学,结合教学实践和课堂实例,探讨如何设计教学过程、改进教学方法,提高教学质量,激发学生学习兴趣等。     

PBL法在应用化学专业英语教学中的应用研究

应用化学专业英语是工科院校面向应用化学专业学生开设的一门必修课,该课程对培养创新型人才具有促进作用。为突破专业英语传统教学模式的局限性,现将PBL(Problem-based Learning)教学法引入该课程的教学体系。结果表明PBL教学法激发了学生的学习兴趣、提高了学生的英语综合能力,促进了创新型应用化学专业人才的培养,在应用化学专业英语的教学中具有可行性,并为该专业英语课程的进一步教学改革奠定了基础。     

关于《材料化学专业英语》课堂教学方法探索

《材料化学专业英语》是针对材料化学专业学生开设的一门专业课程,具有很强的专业性、应用性。从目标、施教方案、反馈效果等方面进行系统策划,围绕材料化学专业英语课程教学,大力推进教学方法改革,开展切实可行的实践教学。结合教学实践,探讨如何设计教学过程,改进教学方法,提高教学效率。     

专业导入在环境工程专业英语教学中的实践

环境工程专业英语是以专业需求为基础的实用型英语,属于一门文理兼顾的课程。采用专业导入的模式组织环境工程专业英语的教学工作,是一种新的教学模式。在教学过程中应注意掌握好适度性、实用性和阶段性等几个原则。在教学实践过程中应结合环境工程专业英语的特点,加强对学生阅读专业知识的能力、分析能力、专业知识英汉互译以及听说能力等应用能力的培养。     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

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.     

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.     

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

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。     

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.     

基于ATRP法制备的触角状亲水性羟胺树脂的吸硼性能的研究

以大分子引发剂氯乙酰化聚苯乙烯微球(PS-acyl-Cl)经原子转移自由基聚合(ATRP)法引发丙烯酰胺(AM)和甲基丙烯酸缩水甘油酯(GMA)单体的共聚接枝,制得一种触角状亲水性环氧载体(PS-acyl-g-P(AM-co-GMA)),再经二乙醇胺(DEA)的环氧基开环胺化反应,得到一种含多个-NCH2CH2OH螯合配基的多齿-五元螯合环的触角状亲水性羟胺树脂(PS-acyl-g-P(AM-co-GMA)-DEA)。将此树脂用于硼吸附研究,结果表明,PS-acyl-g-P(AM-co-GMA)-DEA树脂对硼的吸附满足Langmuir方程,为单分子层吸附;饱和吸附量约为37.7 mg·g-1,且树脂5 min即可达到吸附平衡,与其它已报道的吸硼树脂相比,该树脂具有更高的吸附量和吸硼速率。吸附动力学研究表明,树脂吸附硼的过程主要由颗粒扩散过程控制。重复使用5次后该树脂的吸附量基本不变,解吸率均在90%以上,重复使用性能良好。