土工格室的制备及工程应用

介绍土工格室的制备、作用机理及其在工程中的应用。指出具有三维立体蜂窝状的土工格室因其较强的网兜效应和侧向限制作用可形成更加稳定的“加筋土”结构,目前已被广泛应用于道路与铁道、市政、水利及场地基层和面层等工程领域,特别是在处理地基不均匀沉降、改善路基与路面的使用性能、边坡防护等方面有着独特的优越性。     

塑料土工格室的生产与应用技术

介绍土工格室的结构特点、性能、作用原理、应用领域、生产工艺流程及主要原材料的选择与配方要求等，简要叙述超声波焊接的原理、设备和模具、焊接工艺控制要求，以及土工格室的质量标准、技术要求、物理力学性能指标、安装技术规范等。     

道路改扩建工程土工格室参数优化设计的有限元分析

建立ABAQUS有限元分析模型,分析土工格室高度、层数、间距等参数对地基层的加固强化效果,结论如下：（1）土工格室高度提升可以帮助细腻质地的填充物摩擦力和相互作用能力增强,土工格室变得更凝结和紧固,若高度持续提升,其抗压能力的提升空间越来越小;（2）随着土工格室层数的增加,可以提升新路的稳固性;（3）相邻土工格室距离在20～40cm时,加固效果比较明显。     

聚烯烃土工格室的研制

通过以改性聚烯烃为原料,经挤出成型分切,再超声焊接制成了土工格室,并介绍了土工格室的应用。     

塑料土工格室的生产技术

塑料土工格室是发展中的新型土木工程塑料。简单介绍了塑料土工格室的应用领域、生产设备、原料配方、工艺流程、工艺质量控制、产品主要技术指标等。     

塑料土工格室的生产与应用技术

介绍土工格室的结构特点、性能、生产工艺流程、主要原材料与配方、超声波塑料焊接、质量标准及应用技术。     

高速公路改扩建加宽路基土工格室的应用

土工格室是一种具有立体结构的新型土工合成材料。在岩石工程中与土、砂、石等填料共同构成不同视粘聚力、不同加筋强度、不同深度的垫层。这些垫层可以根据工程的要求放置于需要的位置,用以加固公路的路基、边坡防护、修建挡土墙等,并可以实现公路沿线的生态恢复功能,达到绿化、美化环境的目的。     

土工合成材料——土工格室的研制及应用

研究了以聚丙烯为基材的土工格室的配方、生产工艺流程、影响焊接工艺的因素 ,并进行了工程实际应用试验。结果表明 ,以聚丙烯 /聚乙烯 /改性树脂配比为 8/1/1为原料所研制的土工格室达到了预计的工程效果 ,能够满足工程要求     

双向拉仲塑料土工格栅设备的技术创新

塑料土工格掇被誉为继水泥之后的第四大建筑材料，其市场前景不可小觑，青岛顺德塑料机械有限公司研发了单双向拉伸土工格橱生产线，在拉伸工艺、格概输送，加热方式，夹具结构、牵引方式和配方等多个方面均取得了技术性的突破和创新。     

顺利达研制成功——国内首套全自动PE土工格室流水生产线

最近,国内首套具国际领先水平的全自动PE土工格室流水生产线,在青岛顺利达塑料机械有限公司研制成功推向市场,并陆续从青岛港启运发往甘肃、四川和新加坡、俄罗斯等8家用户。     

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.