聚醚-紫外侧基聚硅氧烷

分子中含二苯甲酮衍生物侧基的聚硅氧烷对紫外光具有良好的吸收作用,可用作光催化聚合反应的光敏剂、化妆品的紫外吸收剂、织物的抗紫外整理剂;但其水溶性较差,影响了应用范围的扩大。西北大学的安秋风等人利用聚甲基氢硅氧烷与4-（β-羟基-γ-烯丙氧）丙氧基-2-羟基二苯甲酮、α-烯基聚醚的硅氢加成反应合成了水溶性聚醚-二苯甲酮衍生物侧基聚硅氧烷（PE—PUVSi）。     

聚醚-紫外侧基聚硅氧烷

分子中含二苯甲酮衍生物侧基的聚硅氧烷对紫外光具有良好的吸收作用，可用作光催化聚合反应的光敏剂、化妆品的紫外吸收剂、织物的抗紫外整理剂；但其水溶性较差，影响了应用范围的扩大。西北大学的安秋风等人利用聚甲基氢硅氧烷与4-（β-羟基-γ-烯丙氧）丙氧基-2-羟基二苯甲酮、α-烯基聚醚的硅氢加成反应合成了水溶性聚醚-二苯甲酮衍生物侧基聚硅氧烷（PE—PUVSi）。     

含铈聚硅氧烷的合成与表征

从硅橡胶与耐热助剂相容性出发,以氢氧化钾催化下环三硅氧烷开环聚合得到的聚有机硅醇钾、甲基封端的二甲基聚硅氧烷、氯化铈为原料合成了POSC。探讨了其反应过程,并通过红外光谱和硅-核磁共振谱表征了产物的分子结构,结果表明POSC为含铈聚有机硅氧烷。     

发光二极管封装用有机硅材料（一）

介绍了发光二极管(LED)的特点.列举了LED用环氧/有机硅混合树脂封装料(加成型有机硅与环氧树脂混合体系、环氧改性聚有机硅氧烷与环氧化合物混合体系)、含环氧基环烷基硅树脂封装料的主要成分及配制,LED的制作及评价等;加成型苯基硅树脂封装料中含Si-H基硅氧烷低聚物作交联剂的苯基硅树脂、含Si-H基、苯基的硅氧烷低聚物作交联剂的苯基硅树脂封装料的主要成分及配制等.     

有机硅紫外吸收剂

陕西科技大学的安秋风等人利用四甲基环四硅氧烷（D4^H）与4-（β-羟基-γ-烯丙氧）丙氧基-2-羟基二苯甲酮（MUV—O）、烯丙基缩水甘油醚、烯丙基聚氧乙烯醚的硅氢加成反应，合成一种分子中携带二苯甲酮衍生物、聚醚及环氧基团的有机硅抗紫外整理剂DMUV-O。并将其用于棉织物后整理，结果表明，     

含金属的高分子

近年来,各国化学家对含金属高分子化合物的研究非常重视,目的在于制取耐热性的聚合物。已经合成的有:聚有机钛硅氧烷、聚有机铝硅氧烷如聚苯基钛硅氧烷、聚苯基铝硅氧烷等。Si∶Al=4∶1的聚苯基铝硅氧烷是一种白色透明的硬脆聚合物。热稳定性好,能溶于有机溶剂,可以用来制造硬质透明的胶片。它的平均分子量为6,000。以M-O键为主键的聚铝氧烷和聚钛氧烷也受人注意。聚有机硅铝氧烷是由硅烷醇与金属铝,或者是将硅烷醇的钠盐与氯化铝所得的铝硅酸盐水解而制得。     

有机硅氧烷改性丙烯酸酯乳液的聚合稳定性分析

在用乳液聚合合成有机硅改性丙烯酸酯微乳液过程的基础上，着重考察了有机硅氧烷种类及用量、有机硅氧烷的加入方式、乳液的pH值以及聚合温度等对有机硅改性丙烯酸酯微乳液聚合过程稳定性的影响。实验结果表明，采用含异丙氧基取代基的硅烷有助于乳液聚合体系的稳定；并且控制硅氧烷用量和聚合体系的pH值、采用后交联技术有助于提高有机硅改性丙烯酸酯乳液聚合过程的稳定性。     

紫外光固化金属防腐蚀涂料的研究－对基质的附着力及其影响因素

提出了紫外光固化金属防腐蚀涂料。此涂料由含环氧基的预聚物、复合稀释剂、复合光引发剂及附着力促进剂等组成。叙述了预聚物合成、涂料配制，以及涂层附着力、耐磨损性的测试方法。讨论了涂料配方变化及附着力促进剂等因素对涂层附着力的影响。实验表明，多官能丙烯酸酯与单官能丙烯酸酯（摩尔比１：１）组成的复合稀释剂的效果最佳。安息香双甲醚与二苯甲酮配合，不仅消除了体系黄变，而且固化快，对紫外光源的适应范围广；复合光引发剂用量为３％。采用烷氧基硅化合物同一种端羟基聚二有机硅氧烷的反应产物作附着力促进剂。     

抗静电涂料

9506235抗静电的架有机硅叙烷涂料:JP06一11655。〔。本专利公力:〕jsl丫6wa Den如Rk(Kanek。,;’Nobuyuki辱)一i”4.4.:6二2页一92/29220寸(i,92.10.6):IPC Cos此99/05 题述涂料包括硅氧烷单体,以及带阳离子季牲塞、瓦_。烷基和可聚合有机残基的聚有机硅氧烷。例如,将,一氨丙些三申氧墓硅烷盐酸、申荃三乙氧塞在烷年。’,一甲塞丙烯酞氧丙基三甲氧基杜烷水解,得到聚有机倍半硅氧烷。将其与季戊也醇三丙烯酸裕、二一甘醇二丙烯酸酣、丙疡酸茉氧基乙醋、二苯甲酮和对二甲氨荃苯甲酸乙醋混合后涂覆在聚碳酸醋上,并爪紫外线固化,形成涂层…     

特殊结构的有机硅表面活性剂(续)

介绍了阴离子型有机硅表面活性剂、含酚基或芳氨基的聚醚改性硅油、反应性聚有机硅氧烷/聚内酯共聚物、含糖基的有机硅表面活性剂的特点、结构、合成方法及应用。     

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.     

ICP-MS法测定地球化学样品中As、Cr、Ge、V等18种微量痕量元素的研究

建立了测定地球化学样品中包括As、Cr、Ge、V等18种微量、痕量元素的ICP-MS方法。地化试样用HF-HNO3混酸分解后,以1 1 HNO3溶解干渣。由于制样不使用盐酸,避免了Cl对As、Cr、Ge、V的质谱干扰。用国家一级地球化学标准物质GBW 07309制备溶液优化仪器工作参数,并用于校准。方法测定限(6s)为:0.007~6.4μg/g,精密度(RSD%,n=12)为:29%~9.4%,经过国家一级地球化学标准物质的分析验证,结果与标准值吻合。方法已应用于国土资源调查的试样分析。     

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.     

基于ATRP法制备的触角状亲水性羟胺树脂的吸硼性能的研究

以大分子引发剂氯乙酰化聚苯乙烯微球(PS-acyl-Cl)经原子转移自由基聚合(ATRP)法引发丙烯酰胺(AM)和甲基丙烯酸缩水甘油酯(GMA)单体的共聚接枝,制得一种触角状亲水性环氧载体(PS-acyl-g-P(AM-co-GMA)),再经二乙醇胺(DEA)的环氧基开环胺化反应,得到一种含多个-NCH2CH2OH螯合配基的多齿-五元螯合环的触角状亲水性羟胺树脂(PS-acyl-g-P(AM-co-GMA)-DEA)。将此树脂用于硼吸附研究,结果表明,PS-acyl-g-P(AM-co-GMA)-DEA树脂对硼的吸附满足Langmuir方程,为单分子层吸附;饱和吸附量约为37.7 mg·g-1,且树脂5 min即可达到吸附平衡,与其它已报道的吸硼树脂相比,该树脂具有更高的吸附量和吸硼速率。吸附动力学研究表明,树脂吸附硼的过程主要由颗粒扩散过程控制。重复使用5次后该树脂的吸附量基本不变,解吸率均在90%以上,重复使用性能良好。