氯气总管补偿器的制作与应用

氯气总管补偿器的制作与应用由于出电槽的氯气总管较长，且氯气温度较高（约７０～９０℃），常会造成管路的热伸长，从而使氯气总管管架和管路弯曲变形，甚至损坏，为此，在氯气总管管路上加装补偿器是很必要的。氯气总管补偿器制作质量及补偿的是否合理是关键环节。如果...     

氯气处理工艺的完善

通过增加事故氯气处理装置、改进氯气冷却方式、改装泡沫干燥筛板塔、更换氯气泵及完善氯气自控手段等措施，完善了氯气处理工艺，达到了节电、提高氯气质量及延长设备使用寿命的目的。     

泡沫干燥塔变形原因及预防措施

通过分析和计算，认为氯气处理PVC材质泡沫干燥塔被氯泵抽变形的原因是1^#、2^#泡沫塔内氯气温度超过80℃。提出的防范措施包括：确保氯气干燥前温度为12—15℃；若发生事故，宜降低电解电流，减少氯气量，减轻氯气处理负荷，并降低Ⅱ级钛冷冻水温度、提高流量。     

不断完善生产工艺降低氯气对环境的污染

不断完善生产工艺降低氯气对环境的污染电解生产过程，氯气流失主要有两部份：（１）生产过程中的排放从电解槽出来的湿氯气，含有大量的水蒸汽，在输送和冷却过程中，水蒸汽冷凝成水同时有少量氯气溶于这部份水中，这便是被排入工业下水的氯水。经冷却后的氯气再用硫酸干...     

氯气泄漏事故抢险救援的处置方法及战斗原则探讨

从氯气的毒害机理、氯气泄漏事故特点入手，探讨了氯气泄漏事故抢险救援的处置方法及战斗原则，消防部队在此基础上，要增加实战训练力度，加强堵漏特勤装备的配备，充分利用相关方面的专业力量，从根本上提高消防部队处置氯气泄漏事故的能力和水平。     

氯气危害不能忽视

介绍了近年氯气安全事故的实例，述说了加强氯气合理使用、遵守安全规定的重要性，及发生氯气泄漏事故的处理方法。     

氯气对生命体的危害及其预防措施

从氯气的性质人手，详细分析了氯气对人体健康的危害及中毒原理，对动植物的影响以及提出一些对氯气泄漏所采取的具体措施。对进一步加深对氯气知识的了解，从而提高人们的环保意识具有重要的意义。     

一种氯气液化工艺方法

一种氯气液化工艺方法，其工艺流程依次为：(1)采用高压离心式气体压缩机，以浓硫酸作为工作介质将干燥氯气一步压缩到0．9-1．2MPa；(2)将压缩后的氯气与硫酸的混合流体送至硫酸分离器进行分离；接着将分离后的压缩气体送至除雾器，去除压缩气体中的雾状硫酸，以进一步提高压缩氯气的纯度；(3)然后再将分离后的压缩氯气送至氯气液化器，采用冷却水冷却     

液氯充装工艺改进

将原用压缩空气压送液氯充装工艺改进为高压氯气压送充装工艺，提高了氯气纯度和收率，消除了事故隐患，节约了大量资金，并提出了解决高压氯气压送充装工艺缺点的方法     

现场电解次溴酸盐发生器在某电厂的示范

氯气多年来已经广泛地用于控制电厂冷却塔中微生物的滋生，并且有着满意的控制效果。近来所关心的是氯气作为一种极危险的物质被列入SARA TitleⅢ中，USEPA正提议将氯气列为一种限制使用的杀虫剂。因此，人们对氯气的替代品产生了浓厚的兴趣。     

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。