铅锌在高炉炼铁中的循环过程与影响评析

介绍了炼铁原料中的铅锌杂质及其矿物特性,着重归纳了铅锌在高炉炼铁过程中的循环变化过程,分析了铅锌杂质在高炉炼铁中的影响与危害。针对高炉原料中的铅锌来源与循环分布特征,提出了应对高炉炼铁中铅锌危害的措施,展望了降低炼铁原料中的铅锌含量的研究方向。     

面向不确定性的供应链管理数据挖掘

在分析供应链管理中的不确定性基础上,介绍了数据挖掘技术,探讨了数据挖掘技术在供应链管理中的应用途径和关键问题,提出了数据挖掘的一般步骤,并对数据挖掘在供应链管理中的发展方向进行了探讨。     

CIM在过程工业中的开发应用

简单回顾了CIM的历史,指出DCS是将CIM领域中的有关概念应用于过程工业中的硬件体系,介绍了CIPS的软件体系和结构,探讨了实现CIPS过程中的若干关键技术,并介绍了2个应用实例。     

涂料中的微塑料及其相关国内外政策法规

介绍了涂料中的微塑料概况,从微塑料的定义入手,细分了涂料中的微塑料类型,展开讨论了其物化性能、在不同涂料中的数据,以及微塑料对人体健康的影响,概述了其在国内外的相关政策法规,以及未来的建议与对策。     

果酸在化妆品中的应用

综述了应用于化妆品中的果酸的种类及其作用机理,介绍了常用的果酸检测方法及其在化妆品中的浓度限制,并简述了果酸在国内外化妆品、个人护理用品中的应用。     

DCS系统在华北油田河间原油稳定站的应用

本文介绍了MACS SmartPro分布式控制系统在原油稳定生产过程中的应用情况,阐述了DCS系统的生产过程中的一些特点,并对应用过程中的注意事项提出了自己的见解.     

日常生活中的化学

文章从以下几个方面论述了日常生活中的化学:食品中的化学;衣服中的化学;家居中的化学。现实生活中人们不一定能正确全面的认识并了解化学,文章对日常生活中的化学给人类带来的利与害进行了阐述。     

三元复合试验区智能提捞抽油机的冬季管理

智能提捞抽油机在三元复合驱中的应用,避免了油井断杆和卡泵故障的发生,但这一新采油设备也存在一些管理难题,例如:取样时机和冬故障季停机等问题,通过生产过程中的摸索,解决了一些生产中的难题,提高了抽油机的时率,解决了生产中的难题。     

项目驱动教学法在本科综合设计实验中的改进建议

阐述项目驱动教学法在本科综合设计实验中的重要性,对比项目驱动教学法与传统教学法在实施中的差异。针对项目驱动教学法实施过程中的难度,提出了自己在实际运用中的实例及改进措施,为项目驱动教学法在本科实验教学中的实践提供了参考依据。     

超滤系统在阴极电泳涂装中的应用

简述了超滤系统在阴极电泳涂装工艺中的作用,介绍了超滤技术的原理及阻碍超滤液生成的因素,着重阐述了超滤系统单元的选择、使用中的注意事项,以及超滤系统在日常使用中的清洗方法。     

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。