灭多威高效液相色谱分析方法研究

采用Ｅ１２５０－２０Ｃ１８色谱柱，紫外检测器，甲醇十水为流动相，内标法定量测定原药和乳油中灭多威的含量。方法具有良好的线性范围，方法的标准偏差原药为０．２１，乳油为０．２２，变异系数原药为０．２２％。乳油为０．８８％，添加回收率原药在９９．４７－１００．２６％之间，乳油９９．５８－１００．０８％之间。     

35%硫丹乳油的气相色谱分析

本文报道一种硫丹油气相色谱分析方法。在５％ＳＥ－３０／Ｅａｓ Ｃｈｒｏｍ Ｑ色谱柱上硫丹α－体和β－体及内标物癸二酸二丙酯的保留时间分别为９．６３、１３．２５和６．２５分钟．α－体和β－体的平均标准偏差分别为０．１１和０．０６，平均变异系数分别为．４５％和０．６６％，平均回收率分别为１００．２％和９９．２％。     

硫双灭多威高效液相色谱分析方法研究

本文采用Ｃ１８色谱柱，乙腈＋水为流动相、紫外检测器、内标法对硫双灭多威进行高效液相色谱分析研究。结果表明，硫双灭多威含量测定的回收率在９９．６８－１００．１６％之间，变异系数为０．３７％。     

辛.硫丹混剂的高效液相色谱分析

采用ＮＯＶａ－ｐａｋＣ１８色谱柱,以苯甲酸异戊酯为内标物对辛·硫丹混剂有效成分辛硫磷、硫丹含量进行高效液相色谱分析,辛硫磷、硫丹变异系数分别为０４２％和１１４％;线性相关系数分别为０９９９８和０９９９６;回收率分别为９９７％～１００４％和９９１％～９９８％。     

25%高渗硫丹乳油的气相色谱分析

本文使用５％ＯＶ－１０１／ｃｈｒｏｍｏｓｏｒｂ８８０玻璃色谱柱，氢火焰离子化检测器，对２５％高渗硫丹乳油进行气相色谱分析，以邻苯二甲酸二丁酯为内标物，对其有效成份进行测定。此法线性关系良好，标准偏差为０．１０，变异系数０．４１％，回收率在９９．４％￣１００．６％之间。     

灭多威高效液相色谱分析方法研究

采用Ｅ１２５０—２０Ｃ＿（１８）色谱柱、紫外检测器、甲醇十水为流动相，内标法定量测定原药和乳油中灭多威的含量。方法具有良好的线性范围，方法的标准偏差原药为０．２１，乳油为０．２２，变异系数原药为０．２２％，乳油为０．８８％，添加回收率原药在９９．４７～１００．３６％之间，乳油在９９．５８～１００．０８％之间。     

三元复配制剂杀虫威的分析方法研究

本文采用气相色谱法，在一根５％ＱＦ－１填充上，以邻苯二甲酸二乙酯和荧蒽为内标，在适宜的色谱条件下对三元复配制剂杀虫威进行分析。方法的变异系数：甲胺磷为０．７３％，异丙威为０．６５％，噻嗪酮为０．５２％。回收率：甲胺磷为９９．０～１００．２％，异丙威为９９．１～９９．７％，噻嗪酮为９９．２～１００．４％。     

硫丹的气相色谱分析

选择４％ＳＥ－３０和６％ＱＦ－１混合固定液柱，以正二十三烷为内标物，气相色谱法测定硫丹含量，方法的平均回收率为９９．８３％，标准偏差为０．１８％。     

38%辛.甲对乳油的液相色谱分析

本文采用液相色谱法同时分析３８％辛．甲对乳油中辛硫磷和甲基对磷磷含量。辛硫磷平均回收率为９９．８％，甲基对硫磷为１０１．４％。辛硫磷标准偏差为０．４７，甲基对硫磷为０．３５。     

灭多威肟的气相色谱分析

以５％ＳＥ－３０＋ＦＦＡＰ／ＧａｓＣｈｒｏｍＱ（１５０－１８０μｍ）为固定相,对灭多威肟进行气相色谱分析,在选定的气相色谱条件下,其最小检测限量为６．０×１０－１０ｇ,方法的标准偏差为０．３５。变异系数为０．４５％,回收率为９９．８６％,适于灭多威肟的分析。     

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。