双—p—N,N—二甲氨基苄叉）酮／二苯基碘Wong盐复合体系的电子…

不同的双－（ｐ－ｎ，ｎ－二甲氨基苄叉）酮ＤＭＢＫ和二苯基碘Ｗｏｎｇ盐（ＩＰＩＯＦ）复合，组成一新新型的电子转移光显色体系。ＤＭＢＫ／ＤＰＩＯＦ复合体系在暗处有良好的热稳定性。在光作用下很快发生从激发态ＤＭＢＫ至ＤＰＩＯＦ的电子转移，并伴随ＤＭＢＫ染料的褪色，测得ＤＭＢＫ光褪色速度的次序为：ＤＭＢＡ＞ＤＭＢＰ＞ＤＭＢＨ。与此同时，电子转移又引起新的光显色反应，对ＤＭＢＡ化合物，在７００ｎｍ处出现新吸     

EXPERIMENTAL INVESTIGATION OF KINETIC AND TRANSPORT PARAMETERS IN A WALL－COOLED FIXED－BED REACTOR

ＥＸＰＥＲＩＭＥＮＴＡＬＩＮＶＥＳＴＩＧＡＴＩＯＮＯＦＫＩＮＥＴＩＣＡＮＤＴＲＡＮＳＰＯＲＴＰＡＲＡＭＥＴＥＲＳＩＮＡＷＡＬＬ－ＣＯＯＬＥＤＦＩＸＥＤ－ＢＥＤＲＥＡＣＴＯＲＺｈｅｎ－ＭｉｎＣＨＥＮＧａｎｄＷｅｉ－ＫａｎｇＹＵＡＮ（ＵＮＩＬＡＢＲｅｓｅ...     

THE PREPARATION OF HIGH－PURITY，ULTRAFINE AND MONODISPERSED TITANIUM DIOXIDE POWDER FROM TITANIUM TETRACHLORIDE BY HYDROLYSIS OF TITANIUM ALKOXIDES

ＴＨＥＰＲＥＰＡＲＡＴＩＯＮＯＦＨＩＧＨ－ＰＵＲＩＴＹ，ＵＬＴＲＡＦＩＮＥＡＮＤＭＯＮＯＤＩＳＰＥＲＳＥＤＴＩＴＡＮＩＵＭＤＩＯＸＩＤＥＰＯＷＤＥＲＦＲＯＭＴＩＴＡＮＩＵＭＴＥＴＲＡＣＨＬＯＲＩＤＥＢＹＨＹＤＲＯＬＹＳＩＳＯＦＴＩＴＡＮＩＵＭＡＬＫＯ...     

CATION－ENHANCED INTRAMOLECULAR PHOTODIMERI－ZATION AND EXCIMER FORMATION OF POLYE－THERS BEARING NAPHTHALE

ＣＡＴＩＯＮ－ＥＮＨＡＮＣＥＤＩＮＴＲＡＭＯＬＥＣＵＬＡＲＰＨＯＴＯＤＩＭＥＲＩ－ＺＡＴＩＯＮＡＮＤＥＸＣＩＭＥＲＦＯＲＭＡＴＩＯＮＯＦＰＯＬＹＥ－ＴＨＥＲＳＢＥＡＲＩＮＧＮＡＰＨＴＨＡＬＥＮＥＣＨＲＯＭＯＰＨＯＲＥＳＴ＿（ＯＮＧ）Ｚ＿（ＨＥＮ－ＨＥ...     

LARGE SCALE PURIFICATION OF PHOSPHOGLYCERATE KINASE（PGK） AND GLYCERALDEHYDE 3－PHOSPHATE DEHYDROGENASE（GAPDH） FROMYELLOW PEAS BY PEG／REPPAL PES AQUEOUS TWO PHASE SYSTEM AND ION EXCHANGE CHROMATOGRAPHY

ＬＡＲＧＥＳＣＡＬＥＰＵＲＩＦＩＣＡＴＩＯＮＯＦＰＨＯＳＰＨＯＧＬＹＣＥＲＡＴＥＫＩＮＡＳＥ（ＰＧＫ）ＡＮＤＧＬＹＣＥＲＡＬＤＥＨＹＤＥ３－ＰＨＯＳＰＨＡＴＥＤＥＨＹＤＲＯＧＥＮＡＳＥ（ＧＡＰＤＨ）ＦＲＯＭＹＥＬＬＯＷＰＥＡＳＢＹＰＥＧ／ＲＥＰＰＡＬ...     

(7-N,N-二甲氨基)香豆素基-3-甲酸乙酯/二芳基碘鎓盐光敏引发聚合反应体系

本工作合成了（７－Ｎ,Ｎ－二甲氨基）香豆素基－３－甲酸乙酯（ＥＤＡＣＦ）光敏剂．在光作用下,激发态的ＥＤＡＣＦ分子与二芳基碘盐ＯＰＰＩＰ分子之间发生电子转移反应,伴随发生ＥＤＡＣＦ的褪色反应和ＯＰＰＩＰ的光解反应,后者生成具有引发活性的芳基自由基．由于ＥＤＡＣＦ具有ＣＴ态特性,使得它与ＯＰＰＩＰ之间的光电子转移反应速度随着溶剂极性增加明显减慢．ＥＤＡＣＦ／ＯＰＰＩＰ体系可有效地引发ＭＭＡ聚合反应,聚合反应动力学方程为Ｒｐ＝Ｋ［ＯＰＰＩＰ］０．４７［ＥＤＡＣＦ］０．４２［ＭＭＡ］０．９８．     

CHEMICAL SENSITIZATION OF TABULAR－GRAIN EMUL－SIONS IN THE PRESENCE OF SENSITIZING DYE

ＣＨＥＭＩＣＡＬＳＥＮＳＩＴＩＺＡＴＩＯＮＯＦＴＡＢＵＬＡＲ－ＧＲＡＩＮＥＭＵＬ－ＳＩＯＮＳＩＮＴＨＥＰＲＥＳＥＮＣＥＯＦＳＥＮＳＩＴＩＺＩＮＧＤＹＥ￥ＣＨＥＭＩＣＡＬＳＥＮＳＩＴＩＺＡＴＩＯＮＯＦＴＡＢＵＬＡＲ－ＧＲＡＩＮＥＭＵＬ－ＳＩＯＮＳＩＮＴ...     

二次氮化法制备γ′－Fe_4N超细粉末

以ＦｅＣｌ＿２·ｎＨ＿２Ｏ和ＮＨ＿３为原料，采用一步气相合成法制备了Ｆｅ／Ｎ超细粉末，并研究了二次氮化法制备氮化铁超细粉末的工艺技术。通过比较实验，证实二次氮化法能够制备单相的γ′－Ｆｅ＿４Ｎ粉末。利用ＸＲＤ、ＴＥＭ、ＸＰＳ和ＶＳＭ等实验手段对Ｆｅ／Ｎ和γ′－Ｆｅ＿４Ｎ粉末的晶态、物相、形貌、成分、粒度和磁性进行了初步表征。实验结果表明，二次氮化法制得的γ′－Ｆｅ＿４Ｎ为高纯、超细、单相的粉末，并且粉末的饱和磁化率σ＿３和矫顽力Ｈｃ值均优于田中隆夫等人的同类研究结果。     

CALIXE［4］ARENE AS A TEMPLATE FOR CONTROLLING REGIOCHEMISTRY OF PHOTODIMERIZATION OF 9－SUBSTITUTED AN

ＣＡＬＩＸＥ［４］ＡＲＥＮＥＡＳＡＴＥＭＰＬＡＴＥＦＯＲＣＯＮＴＲＯＬＬＩＮＧＲＥＧＩＯＣＨＥＭＩＳＴＲＹＯＦＰＨＯＴＯＤＩＭＥＲＩＺＡＴＩＯＮＯＦ９－ＳＵＢＳＴＩＴＵＴＥＤＡＮＴＨＲＡＣＥＮＥＬＩＹＩ；ＴＯＮＧＺＨＥＮ－ＨＥ（ＣＨＥＮ－ＨＯＴＵＮＧ...     

永芳高级系列产品为联合国第四次世界妇女大会唯一指定专用护肤品

永芳高级系列产品为联合国第四次世界妇女大会唯一指定专用护肤品ＹＯＮＧＦＯＮＧＳＵＰＥＲＨＩＧＨ－ＱＵＡＬＩＴＹＰＲＯＤＵＣＴＳＳＥＲＩＥＳＩＳＴＨＥＳＯＬＥＳＫＩＮＣＡＲＥＣＯＳＭＥＴＩＣＳＳＰＥＣＩＡＬＬＹＤＥＳＩＧＮＡＴＥＤＢＹＴＨＥＦＯＵＲＴＨ...     

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。