高效液相色谱法测定有机硅涂料中多环芳烃

建立了一种采用高效液相色谱检测有机硅涂料中多环芳烃的方法，该方法所用色谱柱为多聚C18（LC—PAH）柱，流动相为乙腈／水，采用梯度淋洗方式，开始时为40％乙腈，28min后变为82％乙腈，48min后变成100％乙腈，保持8min。该方法的线性范围为0．10-200mg／L，线性相关系数为0．9993-1．0000，平均回收率为69．59％～100．31％，精密度实验RSD为1．34％～7．84％，检测限（S／N=5）为0．05—0．10mg／L。该方法完全可以满足有机硅涂料中多环芳烃的检测要求。     

噻虫啉的反相高效液相色谱分析

建立了一种用高效液相色谱测定噻虫啉的定量分析方法，采用C18 HPLC色谱柱，以甲醇-水（体积比为70：30）为流动相．选择238nm为检测波长进行检测。结果表明，该方法的标准偏差为0．00103，变异系数为0．1042％。相关系数为0．99947，平均回收率为99．86％。     

柱前衍生高效液相色谱法分析农用链霉素

采用柱前衍生，使用C18反相柱和二极管阵列检测器，以乙腈-0．2％庚磺酸钠溶液（体积比为20：80）为流动相，柱温30℃，流量0．5mL／min，检测波长330nm，外标法对农用链霉素进行定量分析。其标准偏差为0．25，变异系数为0．35％，平均回收率为99．76％，相关系数r为0．9992。与生物效价法比较，该方法操作简单快速，定量准确可靠，适用于产品的常规分析和质量控制研究。     

氟吡磺隆高效液相色谱分析

采用SB-C18 HPLC色谱柱，以甲醇，水（90，10）为流动相，选择254nm为检测波长对氟吡磺隆进行分离和定量分析检测。结果表明本方法的标准偏差为0．0017，变异系数为0．36％，相关系数R^2为0．9999，回收率为98．85％-101．73％。     

HPLC法测定通关藤中绿原酸的含量

应用HPLC法测定通关藤中绿原酸的含量。实验采用Agilent ZOBAX Eclipse C18（150mm×4．6mm，5μm）色谱柱，以乙腈：0。4％磷酸=8：92为流动相，流速0．6mL／min，检测波长327nm，柱温为室温。用外标法测定，绿原酸的平均回收率为98．74％，其检测线性范围为0．672-0．056μg。结果表明，方法简便易行，结果准确可靠。     

氟环唑高效液相色谱分析

建立了一种用高效液相色谱测定氟环唑的定量分析方法。采用C18HPLC色谱柱，以乙腈／水(85／15)为流动相．选择205nm为检测波长进行检测。结果表明本方法的标准偏差为0．14％．变异系数为0．16％，相关系数γ为0．9996，平均回收率为99．91％?     

硫丹原药的气相色谱分析

论述了采用毛细管柱为分离柱，邻苯二甲酸二丁酯为内标物和FID检测器，对硫丹原药进行定量分析的方法。本方法标准偏差为0．15，变异系数为0．16％，回收率在99．0％～101．5％之间，平均回收率为100．7％，线性相关系数为0．9998。     

氟吗啉水分散片剂高效液相色谱分析方法

采用高效液相色谱法外标法定量分析氟吗啉水分散片剂。该方法以甲醇＋水（50＋50）作为流动相，流速为0．5ml／min，C18反相色谱柱，柱温为25℃，检测波长为230nm。本方法的回收率大于99％，变异系数小于0．3％。     

吡氟氯禾灵的高效液相色谱法拆分与测定

在流动相为正庚烷-异丙醇-三氟乙酸（体积比为99．3：0．5：0．2），流速为0．6mL／min，检测波长为278nm，柱温为10℃的分析条件下，利用手性色谱柱Nucleosil chiral-2成功实现了吡氟氯禾灵对映体的手性分离，并建立了对有活性的尺型异构体的定量测定方法。     

25%炔螨特乳油的气相色谱分析

采用气相色谱法，以二十二烷为内标物，OV－101为填充柱，用FID检测器进行25％炔螨特含量的分析。本方法的标准偏差为0．1199，变异系数为0．4737％，线性相关系数为0．9989，回收率为98．74％－100．1％。     

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.     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

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。     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.