二氧化氯在合成氨厂循环冷却水中的应用

介绍了二氧化氯的性能及在合成氨厂循环冷却水中的应用。二氧化氯的杀菌效果不受 p H及水中氨的限制 ,对含氨冷却水微生物控制 ,二氧化氯是比氯更有效的杀菌剂。     

二氧化氯在火电厂冷却循环水中的应用

本文介绍二氧化氯的杀菌特性和二氧化氯在火电厂循环冷却水中的实际应用。为火电厂改善循环水杀生效果,保证冷却水系统稳定运行提供了良好的环境。     

二氧化氯及其在水处理中的应用

二氧化氯是一种高效的消毒剂，其杀菌能力在高ｐＨ与氨存在的情况下仍很好。二氧化氯不会与水中的腐植酸反应生成卤代烃，是理想的代用消毒剂，本文综述了二氧化氯的性质，制备，分析，应用情况，以及二氧化氯消毒时存在的问题与解决办法。     

循环水水质恶化的原因分析及对策

对循环水系统水质恶化的原因进行分析,发现含硫含氨等排污水进入循环水系统后,若采用二氧化氯杀菌剂作主剂,则杀菌效果较差,并且药剂消耗量大,投加时间长,余氯很难合格,最终因杀菌效果差,导致微生物繁殖,水质恶化,水耗偏高,浊度不易控制。     

二氧化氯在循环水杀菌灭藻中出现的问题及解决措施

从杀菌机理和安全性分析循环水系统用二氧化氯替代液氯作为杀菌灭藻剂的必要性,介绍二氧化氯在合成氨循环水系统的应用情况,对出现的问题进行分析并提出相应措施进行改进,取得了明显的效果,应用二氧化氯替代液氯在循环水系统中作为杀菌剂是成功的。     

稳定性二氧化氯的制备及在工业循环水中的杀菌试验

介绍了二氧化氯稳定性的筛选，复配及产品稳定储存试验情况，并用合成的产品对工业循环水做了杀菌试验，结果证明该产品具有用量省，杀菌效果好，作用快等优点，在氨存在的情况下，其杀菌性能明显优于氯气，特别适用于合成氨厂循环水系统的使用。     

二氧化氯在我厂热电循环冷却水中的应用

介绍二氧化氯的杀菌特性和在热电厂循环冷却水中的实际应用. 为热电厂改善循环水杀生效果, 保证冷却水系统稳定运行提供了良好的环境.     

分析工业循环水二氧化氯杀菌灭藻

从杀菌机理和安全性上分析循环水系统,用二氧化氯代替液氯作为杀菌灭藻,介绍二氧化氯在合成氨循环水系统的运用情况,对出现的问题进行系统性分析,并提出相应的应对措施将其进行改进,这说明了二氧化氯在循环水系统中作为杀菌剂是成功的。     

二氧化氯在水处理中的应用

二氧化氯是一种高效的消毒剂,其杀菌能力在高pH值与氨存在的情况下仍很好.二氧化氯不会与水中的腐植酸反应生成卤代烃,是理想的代用消毒剂.本文综述了二氧化氯的性质、制备、应用情况,以及二氧化氯消毒时存在的问题与解决办法.     

取代氯气杀菌的方案筛选及应用

镇海炼化炼油Ⅰ循环水系统采用二氧化氯+次氯酸钠复合杀菌方式,通过现场应用证明杀菌效果良好,能取代氯气杀菌。新方案能有效降低因杀菌带入循环水系统的氯离子浓度,有利于减缓设备腐蚀和进一步提高系统运行浓缩倍数。     

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。