TCS一步法热管纺丝技术的应用及发展前景

TCS一步法热管纺丝技术主要是利用热管装置的温度梯度的拉伸作用，对已固化冷却的初生纤维产生更为强烈的，有效和有序的取向及结晶行为，其结晶度更为完善，其生产的成品丝可直接用于织造等后加工，TCS一步法热管纺丝技术的特点和应用效果，拓展了热管纺丝技术在合成纤维工业中的发展前景。     

纺丝供胶压力控制系统

纺丝供胶压力对粘胶生产线十分重要，本文介绍了变频技术在纺丝供胶压力调节系统中的应用，对其工作原理、软件组态等作了详细说明。     

双螺杆挤出技术在冻胶纺丝工艺中的应用

对双螺杆挤出机用于冻胶纺丝，其结构特性及相关设计多数进行了详细的分析和探讨，同时提出了一些参考建议，经特殊设计加工后的双螺杆挤出机应用在冻胶纺丝工艺上，成功地纺制出高强高模聚乙烯纤维。双螺杆挤出技术用于冻胶纺丝工艺已具备条件并切实可行。     

静电纺丝纳米纤维的工艺原理、现状及应用前景

本文从静电纺丝的基本原理出发，分析了其影响因素。并对静电纺丝的国内外研究状况、应用领域及发展趋势做了全面的介绍。     

壳聚糖纺纤研究进展

本文首先对壳聚糖的结构、化学名称及理化性质进行了简要的介绍，对壳聚糖在纺丝前及纺丝过程中可能碰到的影响因素进行了探讨，并重点对已进行的壳聚糖溶液行为研究进行了概括．对壳聚糖三种纺丝方法——湿法纺丝、干湿法纺丝及静电纺丝的研究进展进行了总结．其中重点介绍了静电纺丝的进展。在文章的最后，对壳聚糖的纺丝前景进行了展望。     

纺丝组件漏浆原因分析

通过对纺丝组件工艺对比调试，分析了纺丝组件消耗材料对纺丝组件漏浆的影响，指出了纺丝组件漏浆的主要影响因素。     

二醋酸纤维纺丝断头因素分析与改善

根据烟用二醋酸纤维的纺丝特点，通过分析醋片、纺丝原液可纺性、纺丝甬道条件、上油对纺丝断头率的影响，采取了相应的改善措施，有效地降低了纺丝断头率，提高了产品品质。     

中介相沥青液晶熔体纺丝

阐述了中介相沥青液晶熔体纺丝工艺条件及其对碳纤维结构与性能的影响，讨论了单孔纺丝中各种纺丝工艺条件与纺丝稳定性的关系，介绍了几种新型纺丝方法如多孔纺丝、异形纺丝、复合纺丝、离心纺丝和熔吹纺丝，简要介绍了获得带形、Ｙ字形、三角形、中空形和线圈状碳纤维的制备工艺，最后指出使用狭缝形喷丝孔易于获得模量高达９３０ＧＰａ的超高模量碳纤维。     

热稳定的聚四氟乙烯纤维及其制备方法

一种分散纺丝的聚四氟乙烯纤维，其表现出改进的断裂前的伸长率，提高的热稳定性，所述纤维由如下方法制备：形成含有聚（四氟乙烯）粒子的分散体的纺丝混合物，由所述纺丝混合物形成中间型含氟聚合物纤维结构，     

EDDP纺丝工艺及其结构与性能的研究

通过实验，找出EDDP合理的POY-DTY纺丝工艺，并对其性能和结构进行研究.结果发现，由于PEG柔性链段的嵌入，使EDDP切片的Tg、Tc、Tm低于PET，因此在用EDDP进行纺丝时，必须降低干燥、纺丝、热定型温度，但无提高侧吹风速。同时发现，EDDP纤维的染色、吸湿、抗静电效果得到明显改善，织物具有仿毛特点。     

Sapindaceae,cyanolipids, and bugs

Scentless plant bugs (Heteroptera: Rhopalidae) are so named because adults of the Serinethinae have vestigial metathoracic scent glands. Serinethines are seed predators of Sapindales, especially Sapindaceae that produce toxic cyanolipids. In two serinethine species whose ranges extend into the southern United States,Jadera haematoloma andJ. sanguinolenta, sequestration of host cyanolipids as glucosides renders these gregarious, aposematic insects unpalatable to a variety of predators. The blood glucoside profile and cyanogenesis ofJadera varies depending on the cyanolipid chemistry of hosts, and adults and larvae fed golden rain tree seeds (Koelreuteria paniculata) excrete the volatile lactone, 4-methyl-2(5H)-furanone, to which they are attracted.Jadera fed balloon vine seeds (Cardiospermum spp.) do not excrete the attractive lactone. Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation ofJadera to a volatile excretory product could be an adaptive response to save time.Mention of a commercial product does not consititute an endorsement by the USDA.     

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.     

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.     

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.     

2008～2009年世界塑料工业进展

收集了2008年7月～2009年6月世界塑料工业的相关资料,介绍了2008～2009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、环氧树脂、不饱和聚酯树脂)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。