电炉用碱性材料

电炉是不定形碱性耐火材料最大的消费者。炉底用内衬材料为干式不定形料， 它是由含高量氧化钙、取自阿尔卑斯山的菱镁矿与不同数量的含优质低铁、取自自然资源的菱镁矿相混合而制得。由于这此材料中矿物质的独特组合及在炉子运转过程中需改变氧压力， 这些混合料可以获得非常好的抗机械性和抗化学侵蚀性。人们已研制出特种制品以便用于陡峭斜坡、直流电炉的阳极和底部气体排出区域的安装。电炉的渣线及下部侧墙处常常用喷补料进行     

德国利恒热工有限公司

德国利恒热工有限公司成立于1969年，主要产品为实验室和工业电炉、感应加热设备、微波加热设备、光谱仪制样设备及特种电炉系统，客户广泛分布在陶瓷、玻璃、钢铁及有色金属、粉末冶金、汽车、齿科和珠宝等各行业，在全球80多个国家拥有众多的客户，2000年德国利恒公司在中国上海设立代表处，凭借优质的产品和良好的服务，和全国各地的科研院所和企业界建立了长期合作关系。     

德国利恒热工有限公司

德国利恒热工有限公司成立于1969年，主要产品为实验室和工业电炉、感应加热设备、微波加热设备、光谱仪制样设备及特种电炉系统。客户广泛分布在陶瓷、玻璃、钢铁及有色金属、粉末冶金、汽车、齿科和珠宝等各行业，在全球80多个国家拥有众多的客户。2000年德国利恒公司在中国上海设立代表处，凭借优质的产品和良好的服务，和全国各地的科研院所和企业界建立了长期合作关系。     

偏心炉底电弧炉组合出钢口砖的研制及应用

以优质电炉镁砂、天然鳞片状石墨、电熔镁铝尖晶石为原料制成的ＥＢＴ砖，在９２ｔ越高功率电炉和３０ｔ直流电弧炉上多炉役使用，其寿命接近或达到了进口产品水平。     

上海精细化工产业园区（金山第二工业区）涂料产业概况

近几年来，随着园区的不断发展，一批批优质的企业纷纷落户园区，主要形成了新型节能环保涂料，新型表面活性剂、催化剂、助剂，特种高分子材料和特种纤维，生物医药等四个产业集群，其中涂料产业发展优势明显。     

不烧高铝砖在电炉顶上的使用

以特级矾土熟料、莫来石为骨料，蓝晶石、硅线石为添加物，外加锆刚玉粉进一步强化基质，生产出的特种高铝砖在电炉盖上使用，取得较好的效果。试验用高铝矾土熟料和莫来石的理化性能示于表１。表１原料的理化性能原料矾土熟料莫来石化学组成／％ＳｉＯ２６．９７２１．８...     

高温炭质隔热材料在炉衬结构中的开发与应用

分析了国内还原性电炉炉衬结构存在的技术问题和破损原因,介绍了轻质炭砖这一新型高效高温隔热材料的研究开发及其在电炉炉衬结构中的应用效果,由此而形成的炉衬新技术进一步完善了国内还原性电炉长寿炉衬结构设计的概念,同时也实现了三高作业下电炉生产高产优质与节能降耗的基本目的。     

矿热电炉炭质高温隔热砖的研制与应用

本文分析了国内矿热电炉炉衬结构存在的技术问题和破损原因,论述了新型炭素材料制品轻质炭砖的生产工艺要点及确立的性能指标,并介绍了轻质炭砖作为高效高温隔热材料在矿热电炉炉衬结构中的应用状况,实现了强化冶炼条件下电炉生产节能降耗,优质高产,炉衬长寿的目的。     

铬刚玉电炉顶中心预制件在电炉上的应用

为了提高电炉炉顶的使用寿命 ,国内绝大多数超高功率电炉炉顶均采用水冷结构 ,但电极周围中心区必须使用耐火材料 ,并且其使用寿命决定了电炉顶的使用寿命。电炉顶中心预制件由于整体性好 ,施工安装方便 ,使用寿命长而受到电炉钢厂特别是大中型电炉钢厂的青睐。1　电炉顶中心预制件的研制根据预制件的技术要求 ,在研制电炉顶中心预制件时 ,主要采取了以下几方面的措施 :(1)选用高纯刚玉作为主要原材料 ,以提高制品的耐高温性能 ,进而提高抗熔损能力 ;(2 )在刚玉质预制件中引入优质氧化铬粉 (Cr2 O3 >99% ) ,提高抗渣性 ,减少熔渣渗透 ,从而…     

镁炭砖在150t超高功率电炉上的应用

天津钢管公司炼钢厂１５０ｔ超高功率电炉用国产优质镁炭砖后，平均寿命达２２０炉，炉衬工作层单耗为１．３６ｋｇ／ｔ。该砖理化性能和使用寿命接近和达到了引进产品水平和设计要求，年节约成本２３０．６万元以上。     

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.     

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。     

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.