化学专业研究生科技论文写作方法研究

科技论文是科技知识的载体,论文质量是评价科研工作者水平和能力的关键依据。本文针对研究生的英文写作课程进行研究,系统地阐述了化学专业英文科技论文的写作特点、撰写方法等。目的是帮助学生掌握科技论文各部分的写作技巧。帮助学生逐步建立起科技论文写作的概念,学得基本语言的运用,挖掘对语言的敏感性和分析能力等各种潜质。     

化学专业研究生英语阅读写作策略浅析

许多大学把在国际刊物上发表文章作为研究生毕业的标准之一。但许多研究生为英语水平所限,常常在阅读和写作方面困难重重。文章介绍了英文文献阅读、英文论文撰写和在线投稿的一些经验与方法。结合英文文献的特点,对这些方法在安排字词句段方面进行探讨,以便研究生们能提高英文论文读写水平并掌握英文论文的投稿技巧。     

浅议如何提高科技论文英文摘要的写作水平

在现代科技论文中,“摘要”是一个必不可少的组成部分。对我国科技工作者来说,用简明扼要的英文摘要形式来介绍自己的研究内容和成果,对于提高读者兴趣,增强文章吸引力,从而扩大国际学术交流,提高我国在国际研究领域中的地位有着极为重要的意义。撰写英文摘要时所使用的英文质量的好坏直接影响到上述目标的实现,也在一定程度上反映了文章作者的学术水平和工作的严谨程度。     

本科生毕业论文质量监控方案的构建

毕业论文(设计)是本科教学的重要实践环节,也是本科生创新能力、实践能力和撰写能力的综合体现。加强对毕业论文过程的全面质量监控,把毕业论文的撰写过程制度化、规范化、科学化、系统化,是提高本科毕业论文质量的重要环节。文章对本科毕业论文质量监控方案进行了探讨,制定了本科毕业论文质量监控的具体措施,供有关高校借鉴。     

化学专业英语教学体会

化学专业英语教学旨在培养学生阅读英文文献、使用英语撰写科技论文和进行国际学术交流的能力。本文主要讨论了化学专业英语教学的特点及教学中存在的问题,研究了提高化学专业英语教学质量的方法。     

浅谈化学专业英语论文写作

科学研究的一个重要任务之一就是将研究结果以一种"条理清晰、逻辑推理严密"的方式写成论文,向读者详细介绍"所在领域的研究进展、存在的问题、解决的方略、实验数据和得出的主要结论"。文章根据国际化学专业期刊对稿件的要求,简要地探讨了在撰写英文稿件中存在的问题,介绍了写好一篇化学专业英语论文的方法和技巧。     

化学专业英语课中文献部分教学改革初探

本文探讨了高等学校化学专业英语课本中文献部分的现状及如何改革的问题。根据实际教学的经验,找到一些化学专业英语教材中的文献选读部分的不足,从备课的文献准备和教学中的文献讲解两部分来说明如何进行化学专业英语课中文献部分的教学改革。希望通过教学的改革的学习,使学生在化学科研方面的兴趣得到提升,在撰写英文摘要和小论文方面的能力得到提高。     

科技期刊论文的选题原则与撰写策略——基于《燃料与化工》的审稿视角

结合科技期刊审稿实践,分析投稿论文存在的问题,探讨科技论文的选题原则与撰写策略,阐述逻辑思维在论文撰写中的重要作用,为科技论文写作提供参考和借鉴。逻辑思维在撰写过程中具有指导意义,科技论文的撰写应注重逻辑思维的运用,通过把握准确的选题原则和撰写方法可提高论文的专业学术水平和撰写质量。     

国际化背景下工科ESP教学中的本科毕业论文英语摘要教学实践

针对目前本科毕业论文英文摘要的质量较差,从分析问题入手,采用问卷调查摘要撰写中存在的明显问题。借助工科ESP英语课程教学改革增设英文摘要写作环节,从明确摘要是一种体裁、强化摘要的写作格式、熟悉摘要的语法特点等方面加以强化提升学生的毕业论文英语摘要写作能力,为培养出国际化的高素质复合型人才发挥作用。     

如何撰写科技论文

文章从科技论文的特点、类型、选题、格式四个方面介绍如何撰写科技论文。     

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.     

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.     

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。