25％福美双·克百威·萎锈灵悬浮种衣剂液相色谱分析

本文采用高效液相色谱法,以C18为固定相,甲醇＋水为流动相,用紫外检测器定量测定混荆中福美双、克百威和萎锈灵的含量。本方法的变异系数分别为O．11％、0．01％、0．03％;标准偏差分剐为0．013、0．007、O．021;平均回收率分剐为99．35％、99．17％、99．60％;线性相关系数分别为0．9996、0．9989、O．9994。     

用AFS-930型双道原子荧光光度计同时测定水样中的砷和汞

应用AFS-930型双道原子荧光光度计同时测定水中As和Hg,操作方法简单快速,基体干扰少。砷和汞的检出限分别为As：0．05μg／L,Hg：0．02μg／L;相对标准偏差（RSD）为As≤3．11％,Hg≤6．94％;回收率As在96．1％～106．5％之间],Hg在97．5％～107．0％之间;相关系数As为0．9999,Hg为0．9994。     

42％扑·莠·乙草胺悬乳剂的液相色谱分析

应用液相色谱法测定42％扑·莠·乙草胺悬乳剂有效成分的质量分数。采用乙腈-水（体积比70：30）为流动相，使用C18柱、紫外检测器的高效液相色谱，标准偏差分别为扑草净0．023，莠去津0．022，乙草胺0．037；变异系数分别为扑草净0．23％，莠去津0．24％，乙草胺0．16％。经验证添加回收率分别为扑草净100．03％，莠去津99．92％，乙草胺99．91％；线性相关系数分别为扑草净0．9991、莠去津0．9995、乙草胺0．9998。     

气相色谱同柱测定莠去津与乙草胺

研究了用气相色谱同柱测定莠去津、乙草胺的含量,方法简便、快速。标准偏差：乙草胺为0．34,莠去津为0.36;变异系数：乙草胺为0．62％,莠去津为0．67％;平均回收率：乙草胺为100．03％,莠去津为99．98％。     

中石油开发储罐溶剂聚氨酯防腐涂料

中国石油天然气集团公司旗下中国石油天然气管道局研制出一种储罐用无溶剂聚氨酯耐候防腐涂料。这种双组分聚氨酯涂料产品中,A组份包括羟基组分20％～60％、分散剂0．3％～1．0％、消泡剂0．5％～2．0％、流平剂0．2％～0．6％、除水剂2．0％～5．0％、防沉剂0．5％～1．0％、固化促进剂0．1％～1．0％、紫外光吸收剂1．0％-3．0％、光稳定剂0．5％～2．0％、抗氧剂0．2％～1．0％、三聚磷酸二氢铝5．0％-20％、钛白粉10％～25％、硫酸钡10％～20％、沸石粉4．O％～6．0％,羟基组分为对蓖麻油进行化学改性得到的聚酯聚醚多元醇;B组份为六亚甲基二异氰酸酯固化剂。     

2005年我国塑料制品的需求

2005年我国塑料制品需求量将达到25Mt。其中,农用塑料制品为4．70Mt．占总需求量的18．8％;包装塑料制品5．50Mt．占总需求量的22．0％;建筑用塑料制品为4．00Mt．占总需求量的16．0％;工业配套用塑料制品为4．50Mt。占总需求量的18．0％;日用塑料和医用塑料制品为4．72Mt,占总需求量的18．9％：人造革、合成革产品为0．78Mt,占总需求量的3．1％：其他塑料制品为0．80Mt,占总需求量的3．2％。     

4．8％鱼藤酮·辣椒碱悬浮剂的高效液相色谱分析

建立HPLC法测定4．8％鱼藤酮·辣椒碱悬浮剂中鱼藤酮与辣椒碱含量。采用XDB—C18柱分离，以乙腈-0．1％磷酸溶液为流动相，流速1．0mL／min，外标法定量分析。结果表明：鱼藤酮与辣椒碱的线性相关系数分别为0．9998和0．9999，中间精密度分别为0．15％-1．96％，平均回收率分别为101．16％和102．01％。     

2008年我国合成树脂市场分析

2007年我国合成树脂需求继续保持良好的增长态势,产量达3073．6万t,比上年增长18．5％;进口量1896．9万t,同比增长了5．0％;表观消费量为4588．1万t,同比增长13．1％。同期五大通用合成树脂产量为2849．1万t,同比增长17．0％;五大通用合成树脂表观消费量为3971．0万t,同比增长9．7％。     

丹麦_2株卡介苗人体反应及效果观察

成都、兰州和长春生物制品研究所分别用上海丹麦2株卡介苗菌种在各所各生产3批卡介苗,并以上海所卡介苗为对照,同时分别在北京、杭州和广州3地区,对新生儿作接种后的异常反应和免疫效果比较。各地观察人数分别为9016、7240和9986人;阳转率分别为：成都苗95．6％～99．8％;兰州苗97．2％～98．9％;长春苗99．2％～100％;上海苗95.5％～99．1％;淋巴结总反应率为0．138％;分别为长春苗0．216％,成都苗0．241％,兰州苗0,上海苗0.075％。其中长春苗出现淋巴结化脓5例（0．059％）,成都苗4例（0．085％）。广东省生物制品所也自制了丹麦2株卡介苗在广州地区作了观察,结果亦相近。     

双甘膦和草甘膦的高效液相色谱分析法

利用高效液相色谱,采用外标法测定样品中的草甘膦和双甘膦的含量,紫外检测器检测波长为195nm,色谱柱为SAX强阴离子交换柱,用0．005mol·L^-1磷酸二氢钾缓冲液（pH2．0）为流动相,对样品进行分析,试验测得草甘膦和双甘膦的相关线性系数分别为0．9996和0．9989,标准偏差分别为0．035和0．098,回收率分别为98．5％。101．5％和97.8％～102．5％。     

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。