二氧化氯用于饮水消毒的工程可行性研究

本文从二氧化氯投加量、加二氧化氯水样中氯仿含量、投加二氧化氯工艺流程三方面研究了二氧化氯用于饮水消毒的工程可行性。结果表明：二氧化氯投加量低于氯的投加量;加二氧化氯水样与原水相比不产生额外的氯仿;投加二氧化氯的设备成本较低,工艺流程简单。     

二氧化氯催化氧化处理工业有机废水的发展

二氧化氯作为一种水处理药剂因其优良的性能已被广泛应用于水处理领域,利用二氧化氯的强氧化性处理难降解废水是其在水处理中的主要用途之一.综述了二氧化氯在处理废水中的优越性及二氧化氯与有机物、无机物的反应具有选择性的问题,并且论述了常温常压下二氧化氯催化氧化技术及二氧化氯催化氧化的反应机理,展望了二氧化氯在水处理领域的应用前景.     

稳定性二氧化氯研究进展

对二氧化氯的理化性质进行了小结 ,并分析介绍了以不同类型稳定剂制备的稳定性二氧化氯的制取原理及其特点 ,重点介绍了以有机稳定剂制备的有机稳定性二氧化氯的特点和应用 ,对开发稳定性二氧化氯新产品、开拓二氧化氯市场有重要意义     

二氧化氯的性质、制备及应用

二氧化氯是一种新型高效的杀菌消毒剂，本文详尽地叙述了二氧化氯的性质、应用及各种制备方法，对稳定性二氧化氯及固体二氧化氯的性质、用途也做了详细的报道。     

二氧化氯的开发与应用

介绍了二氧化氯的性质、生产方法以及稳定型二氧化氯、粉末二氧化氯的制备方法。阐述了国内外开发现状和发展趋势。     

二氧化氯的制备方法

二氧化氯是一种新型高效的杀菌剂。详尽叙述了二氧化氯的性质，叙述了以氯酸盐、亚氯酸盐为主要原料的化学法和电解法制备二氧化氯技术的进展，以及稳定性二氧化氯的制备方法。指出二氧化氯的制备方法，向着降低成本、简化流程．寻找更廉价的还原剂等方向发展。     

二氧化氯的研究进展

综述了二氧化氯和稳定性二氧化氯的制备、结构及杀菌消毒机理,介绍了二氧化氯和稳定性二氧化氯国内外发展现状及其在各方面的应用,并提出了目前的主要研究趋势.     

氯碱厂开发稳定型二氧化氯的可行性分析

对现有的二氧化氯生产方法进行了比较,分析了抑制二氧化氯发展的原因,指出氯碱厂开发二氧化氯真有的有利条件包括：国内稳定型二氧化氯市场前景广阔,氯碱厂有电力装置及资源优势、电解生产技术优势、经济成本优势、无不安全隐患。     

二氧化氯纯水溶液的制备及在水处理中的应用

介绍了二氧化氯非水溶液的制备,以及用水萃取二氧化氯非水溶液制备二氧化氯纯水溶液的方法,同时探讨了用二氧化氯处理水时的加入量、浓度及沉降时间对处理效果的影响。     

次氯酸钠与二氧化氯联用降低消毒副产物的应用探讨

为了解决自来水厂应用二氧化氯导致的消毒副产物亚氯酸盐、氯酸盐超标问题,对亚氯酸盐生成量与二氧化氯投加量相关性进行了测定分析,开展了以次氯酸钠替代二氧化氯消毒,同时保留二氧化氯预氧化生产性实验。结果表明,亚氯酸盐生成量与二氧化氯投加量显著相关,因此,采用二氧化氯预氧化与次氯酸盐消毒联用,既保证了水质消毒效果,又使水中亚氯酸盐的浓度大幅度降低并稳定达标。     

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。