1-(2-氯-4-吡啶基)-3-苯基脲的高效液相色谱分析

采用高效液相色谱法，以甲醇：乙酸：水(50：3：47，V／V)为流动相，采用ODS—C18色谱柱和紫外检测器，用外标法对苯异氰酸酯法合成的标题化合物进行定量分析。标准偏差0．253％，变异系数0．524％，平均回收率98．5％。     

高效液相色谱法测定合成10-HDA的含量分析

为了建立高效液相方法测定10-羟基-2-癸烯酸（10-HDA）工业品的检测条件和方法,采用高效液相色谱外标法测定了人工合成的10-HDA的含量。实验采用的色谱条件如下：色谱柱为DiamonsilC18流动相为V（甲醇）：V（水）：V（酸）=60：40：0．2,流速为1．0ml／min,检测波长为210nm。实验结果表明：测定方法的线性关系良好,R=0．9994,相对标准偏差为0．057％,回收率为97．8％～100．9％。测定方法简单、快速、准确,重现性好,回收率高,适用于工业产品10-HDA的含量测定。     

关于合成2-溴-2-硝基-1,3-丙二醇新方法的研究

通过硝基甲烷先溴化再缩合的方法合成了2-溴-2-硝基-1,3-丙二醇,合成最佳反应条件为：在溴化反应中,NaOH与CH3NO2的物质的量比为1．1：1．0,NaOH溶液的质量浓度为25％,成盐温度为-5～0℃,溴化温度为15℃;在缩合反应中．溶液pH5～6,缩合温度为25℃,V镕剂：V反应原料=2．0：1．0。质量分数为98％,产品总收率为83．5%。     

盐析法提取聚季铵盐-7中残余丙烯酰胺的研究

采用硫酸钠将聚季铵盐-7高聚物析出,然后用甲醇／异丙醇对其中的残留单体丙烯酰胺（AM）进行提取,同时用高效液相色谱对提取液中的丙烯酰胺进行测定,得到了最佳提取方案：V（甲醇）：V（异丙醇）：1：1,搅拌提取时间60min;最佳色谱条件为：流动相V（甲醇）：V（水）=4：96,流速1．0mL／min;在最佳条件下测试回收率在97．37％～99．68％范围内,相对标准偏差为2．96％。     

4，6-二甲氧基-2-甲砜基嘧啶的高效液相色谱分析

介绍了4,6-二甲氧基-2-甲砜基嘧啶的高效液相色谱分析方法。使用C18液相色谱柱,以水：乙腈;甲醇（30：10：60）为流动相,在UV254nm下对其进行了定性定量分析。方法的标准偏差为0．25,变异系数为0．25％,回收率在99．25％-100．41％,线形相关系数为0．9999。     

2-羟基-6-氯喹喔啉含量的测定

采用高效液相色谱法,以KromasilC18（200mill×4．6ml／l,5um）为固定相,以甲醇＋水混合液（V（甲醇）：V（水）=700：300）为流动相,流速为0．6mL／min,柱温为35℃,检测波长为254nm,测得2-羟基-6-氯喹喔啉的变异系数为0．23％,平均回收率为99．69％。     

3-氯-2-甲基-2-羟基丙基脲的合成

采用2-甲基环氧氯丙烷、尿素为原料．对合成3-氯-2-甲基-2-羟基丙基脲的方法进行了研究。最佳工艺条件为：原料体积比V（2-甲基环氧氯丙烷）／V（50％尿素水溶液）=0．58,反应温度为70～80℃,反应时间为75min,C（Na3PO4）=0．1mol／L10mL．所得产物的环氧值和氯离子生成率都比较小,产物以3-氯-2-甲基-2-羟基丙基脲为主。     

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％。     

5-氟尿嘧啶合成工艺研究

以氟乙酸甲酯为原料,在甲醇钠催化下与甲酸乙酯缩合得氟代甲酰乙酸酯烯醇式钠盐（化合物Ⅱ）,化合物Ⅱ与O-甲基异脲硫酸盐环合得2-甲氧基-5-氟尿嘧啶（化合物V）,V在稀盐酸中水解为5-氟尿嘧啶。在n（氟乙酸甲酯）：n（钠）：n（甲酸乙酯）：n（O-甲基异脲硫酸盐）;1．0：3．0：2．5：1．0、缩合温度为35℃、缩合时间为2h、环合温度为40℃、环合时间为6h以及水解温度为60℃的最佳反应条件下,目标化合物总收率为45．3％、纯度大于95％,其结构经IR、1^HNMR确证。     

6-硝基-1,2-重氮氧基-4-萘磺酸及其杂质的高效液相色谱分析

本文以反相高效液相色谱对6-硝基-1，2-重氮氧基-4-茶磺酸及有机杂质进行了分析，选择了流动相、离子对、检测波长，研究了不同牌号ODS C18色谱柱的重现性，得到了6-硝基-1，2-重氮氧基-4-萘磺酸及杂质(1，2-重氮氧基-4-萘磺酸、8-硝基-1，2-重氮氧基-4-萘磺酸)的相关系数分别为：0.99956、0.99991、0.99317；标准偏差和变异系数分别为：0.214250％、0．016890％、0．564557％、0.012695%、0.488467％、0.014560％得到了准确度数据，确定了最小检出量。     

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。