醚菌酯的气相色谱分析方法

介绍了醚菌酯原药样品的气相色谱定量分析方法，选用HP-5石英毛细管柱，以磷酸三苯酯为内标物，进样口和检测器温度均为250℃，柱温为230C，对醚菌酯原药进行测定。该方法的变异系数为0．149％，回收率为98．12％～101．45％，线性相关系数r=1．000。     

苯甲酰甲酸甲酯气相色谱法的分析研究

用5％OV－17，长度为2m的不锈钢填充柱，以邻氯硝基苯为内标物，在150℃柱温下，用FID检测器对苯甲酰甲酸甲酯进行定量分析。该方法变异系数为0．21％，平均回收率100．22％，线性相关系数为0．99995。     

3-溴-4-氟苯甲醛的气相色谱分析方法

采用气相色谱法，氢火焰离子化检测器，选用3％OV-17填充柱，正十三烷为内标，气化室和检测器温度为180℃，柱温120℃，对3-溴-4-氟苯甲醛进行定量测定。该方法简单、快速、准确、适用，标准偏差0．26％、变异系数0．27％、平均回收率100.1％．     

0.8%四氟菊酯驱蚊药液的毛细管柱气相色谱分析

描述了用毛细管气相色谱对0．8%四氟菊酯驱蚊药液的定量分析方法。样品溶于含内标物邻苯二甲酸二正戊酯的异丙醇中，用DB-1毛细管分离并用带有火焰离子化检测器的气相色谱测定四氟菊酯。气化室温度：230℃；检测器温度：300℃；柱箱温度：起始温度100℃；升温速率15℃／min；终止温度28℃，保持时间10min。方法的变异系数为6．4%，回收率在92%～108%之间。     

3-溴-4-氟苯甲醛的气相色谱分析方法

采用气相色谱法,氢火焰离子化检测器,选用3％OV-17填充柱,正十三烷为内标,气化室和检测器温度为180℃．柱温120℃,对3-溴-4-氟苯甲醛进行定量测定。标准偏差0．26％、变异系数0．27％、平均回收率100．1％。     

3-甲基-4-硝基苯酚的气相色谱分析

采用气相色谱法,以丙体六六六为内标物,用内填充SE-54固定相的不锈钢色谱柱,柱温为190℃对3-甲基-4-硝基苯酚进行定量分析。试验证明：3-甲基-4-硝基苯酚平均回收率为100．2％,变异系数为0．35％。     

毛细管气相色谱法定量分析氟硅唑

采用HP-5石英毛细管色谱柱和FID检测器,以邻苯二甲酸二辛酯为内标物,在适宜的色谱条件下对40％氟硅唑乳油进行定量分析。色谱条件为柱箱采用程序升温,180℃保持0．5min,以25℃／min速率升至240℃,保持4min;进样口温度250℃。检测器温度250℃,气体流速为载气（N2）3ml／min,燃气（H2）30ml／min,助燃气（Air）300ml／min,分流比60：1．本方法的变异系数、平均回收率、标准偏差分别为0．16％、99．70％、0．064％,线性相关系数为0．9999。     

气相色谱法测定来曲唑中甲醇、异丙醇、叔丁醇、乙酸乙酯以及DMF的残留量

目的：建立可靠的气相色谱法,进行抗癌药来曲唑的残留溶剂测定。方法：采用气相色谱直接进样法,以正庚烷为内标物质对样品进行测定;色谱柱：DB-624毛细管色谱柱30m×0．53nm×3．0μm：气化室温度：230℃：检测器温度：250℃;载气：氦气,流速：3．5mL·min’（恒定流量）;分流进样,分流比：5：1：进样体积：1．0μL;柱温：60℃保持1rain,然后以6℃·min^-1升温至90℃,然后以15℃-min。升温至220℃（3rain）;H2流速30mL·min^-1,空气流速300mL·min^-1：运行时间：17．7min。结果：甲醇、异丙醇、叔丁醇、乙酸乙酯以及DMF在各自的浓度范围内线性关系良好,回收率符合规定。结沦：该方法准确,灵敏度高,可以用于来曲唑残留溶剂测定。     

乙酰吗啉的气相色谱分析

采用气相色谱法,柱填充物为3％OV-225,涂渍在Chromosorb W AW DMCS（180～250μm）上,柱温210℃,气化室温280℃,检测室温280℃,内标物为邻苯二甲酸二环己酯,用内标法对乙酰吗啉有效成分进行分离和检验。方法标准偏差≤0．11,变异系数〈0.55,平均回收率为100.46％。     

毛细管气相色谱法定量分析腐霉利

采用DB-35石英毛细管色谱柱和FID检测器,以邻苯二甲酸二丁酯为内标物,在适宜的色谱条件下对腐霉利进行定量分析。色谱条件为柱箱温度220℃;进样口温度280℃,检测器温度280℃,气体流速为载气（N2）6mL／min,燃气（H2）30mL／min,助燃气（Air）300mL／min,分流比20：1。本方法的变异系数0．316％,平均回收率99．82％,线性相关系数为0．9999。     

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。