欧技工艺三聚氰胺装置运行情况分析

目前我国三聚氰胺的生产工艺主要有三种：欧技公司的高压法生产工艺、荷兰DSM的低压法生产工艺以及中国清大华业和江苏天辰的常压法生产工艺。我公司拥有这三种生产工艺的生产装置。三种生产工艺各具特点，就装置运行状况来看，欧技的生产装置更具有运行优势，因此，目前欧技公司的生产装置在中国乃至世界均处于蓬勃发展之势。     

水泥生产工艺中的安全要素及管理改进

安全是企业承担的一项重要社会责任，安全管理是生产制造企业的一项重要工作，良好的安全管理能够促进企业生产经营健康发展。与井下采矿业相比，水泥生产工艺布置虽在地面，然而存在的安全隐患依然较多，安全事故时有发生。水泥生产工艺布置为流水作业线，各道工序紧密结合，各环节的安全运行才能保证整体生产的正常进行。笔者针对水泥生产工艺的特点，以蒲白矿务局水泥厂为例，对水泥生产工艺中的重点安全要素和管理改进做如下分析探讨。一、水泥生产工艺中的安全要素１．生产工艺简介要研究水泥生产工艺中的安全要素，需要从研究水泥生产…     

浅论硫脲生产新工艺

介绍了硫脲新、旧两种生产工艺，论述了新的硫脲生产工艺的先进性，指出应用新的硫脲生产工艺不仅具有很好的经济效益，而且具有很好的社会效益。     

三氯异氰尿酸的生产工艺评述

评述了国内外三氯异氰尿酸的生产工艺，提出了适合国内氯碱企业采用的2种生产工艺即微分环流连续氯化生产工艺和二氯异氰尿酸钠深度氯化法生产工艺。     

圆筒式纸／塑复合工艺及设备探讨

本文介绍了筒料复合制袋机组的生产工艺，并对复合调和生产工艺及相互关系进行了初步试验，结合生产实际指出了最佳生产工艺指标，对实际生产具有指导意义。     

二氢松油醇生产工艺的改进

二氢松油醇原生产工艺存在含量、收率偏低等问题，通过改变生产工艺并结合生产实际反复实验论证，确定了最佳生产工艺条件。     

火柴生产工艺及现场管理关键词的提出及释义探讨

前言 火柴生产的日常管理工作很多，涉及到方方面面。要搞好日常生产工艺管理、特别是生产现场的工艺管理工作，必须有一个清晰的思路为指导。文章以火柴生产工艺特性为突破口，依火柴工艺技术标准实质为内涵，结合生产工艺现场管理特点，提出了“水份、温度、均匀、稳定”的八字火柴生产工艺管理关键词，并加以释义、探讨、论证，目的：言简意赅地概括日常生产工艺管理和监督的主线，从而更深刻地领会和贯彻企业相关法则，以维护和谐的生产秩序。     

国内外硝酸钾生产工艺综述

本文概述了国内外硝酸钾生产工艺，并对各种工艺技术进行了比较，分析同较佳生产工艺     

注射剂类药品生产工艺和处方核查工作启动

为加强药品生产工艺和处方变更的监管，进一步规范注射剂类药品生产秩序，解决药品生产企业不按照注册申报的工艺和处方生产、变更工艺和处方不按规定研究和申报的问题，国家食品药品监管局决定开展注射剂类药品生产工艺和处方核查工作。国家食品药品监督管理局8月10日印发《关于开展注射剂类药品生产工艺和处方核查工作的通知》，决定开展注射剂类药品生产工艺和处方核查工作，并制定了《注射剂类药品生产工艺和处方核查工作方案》。[第一段]     

云南磷矿干法生产过磷酸钙的工艺技术

过磷酸钙的生产工艺技术，因矿的品质不同而各异，重点介绍云南磷矿的干法生产工艺技术。     

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.     

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。     

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.     

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.     

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.