管道应力分析软件在石化工程设计中的应用

介绍了广泛应用于石油、化工、电力等行业的应力分析软件CaesarⅡ分析了管道应力分析的必要性,介绍了软件应用范围,探讨了如何确定哪些管道需要进行分析,并简述了管道应力分析的基本流程。     

现代仪器分析在玻璃纤维检测中的应用

现代仪器分析灵敏度高,选择性好,检出限低,准确性好,为玻璃纤维原料及制品的定性、定量及形态分析提供了重要的测试手段。作者阐述了常用的现代仪器分析的种类、特性、作用,分析讨论了成分分析、元素价态形态分析、复杂样品的痕量分析在玻璃纤维检测中的应用,最后介绍了现代分析仪器在仪器联用、自动化方面的前景。     

化工分析过程中容易出现的问题及解决措施

化工分析工作对于生产企业、科研单位有着重要的价值,特别在工业现代化的建设过程中,更应该建立全面化工分析工作体系。本研究立足于化工分析的实际,对化工分析工作的价值展开了论述,阐述了化工分析的概念,说明了化工分析工作的主要作用,描述了当前化工分析工作存在的素质、质量、操作、仪器等方面的问题,提供了新时期以素质提升、终点误差控制、分析过程加强、节能环保等方法,提升化工分析工作精度和质量的措施。     

基于仪器分析技术在油品分析研究

从油品分析概述入手,分析了油品光谱法分析的重要性,之后注重探讨了基于仪器分析技术的油品分析,主要包括气相色谱法、高效液相色谱法、质谱法、近红外等,进一步促进仪器分析技术在油品分析中的应用和发展。     

气相色谱技术在石油和石化产品生产中的应用

气相色谱技术是现代仪器分析的重要内容,具有分离能力强,灵敏度高、分析速度快等特点,能够有效满足油气田生产、炼厂产品检测、石化产品分析的需要,使得气相色谱技术在石油和石化分析中得到了广泛的应用。本文综述了气相色谱技术在油气田生产、气体分析、模拟蒸馏、汽油组成分析、单体硫化物分析中的应用,并就气相色谱目前存在的问题和对未来的发展做出了展望。     

热分析技术在涂料分析研究中的应用

介绍了近些年来国内外热分析技术在涂料分析研究中的应用进展。阐述了热分析技术在涂料成分和含量分析、固化、老化、热稳定性、热降解等方面的应用,最后展望了热分析技术在涂料分析研究的应用前景。     

HAZOP分析法在煤化工液氮洗工艺中的应用

介绍了危险性和可操作性分析(HAZOP分析)程序,以及其分析时机,分析的组织形式,重点介绍了分析过程。为了解决液氮洗系统中流量、压力、温度、液位、组分难以控制的问题,引入HAZOP分析。通过HAZOP分析,找出液氮洗装置运行过程中潜在的不安全因素,并对可能导致的后果提出建议措施,优化了系统的安全性和可靠性。     

大型汽车水箱滚塑成型的变形分析

利用Ansys有限元分析软件对滚塑成型的汽车水箱进行了变形分析,获得了汽车水箱在装满水的情况下的不同位置的位移分布图,并分析了影响水箱变形的结构因素,得出了汽车水箱的优化结构。整个建模、分析过程为滚塑成型塑料制品的变形分析等提供了可靠、高效的理论依据。     

近红外光谱分析技术及其应用

对近红外分析技术的研究和应用进行了综述,包括近红外分析技术的概述、分类并分析其特点,重点介绍了近红外光谱分析技术在石化、煤炭、药物分析、食品、茶叶和烟草等领域的应用.     

现代仪器分析在环境无机分析化学中的应用与发展

现代仪器分析是环境分析化学的重要手段,本文报道了现代分析仪器的种类、特性和作用,调查研究了现代仪器分析在无机污染物分析、元素价态形态分析及复杂样品的痕量分析研究及仪器联用、自动化方面的应用。现代仪器分析为环境分析化学研究无机污染物提供了强有力的工具,被证实是灵敏、可靠、快速的检测方法。     

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.     

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.     

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。     

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.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.