水工钢闸门的粘涂防腐

水环境的恶化、使水工钢闸门腐蚀加重，不饱和聚酯玻璃钢复合防腐工艺用于各种水环境中的水工钢闸门防腐，效果良好，结合农场工程施工经验，提出了水工钢闸门聚酯玻璃钢复合防腐层结构设计，施工工艺及质量标准，为该工艺的推广应用提供了一定的参考依据。     

水工钢闸门聚酯玻璃钢复合防腐处理方法

水环境的恶化，使水工钢闸门腐蚀加重，传统的防腐工艺保护效果下降。降酯玻璃钢复合防腐层的水工钢闸门防腐工艺具有使用设备少，工艺简单，防腐效果好，成本低等优点，适用于各种水环境中的各种形式的水工钢闸门防腐，效果良好。该文结合江苏省淮海农场工程施工经验，提出了水工钢闸门聚酯玻璃钢复合防腐层结构设计，施工工艺及质量标准，为今后的推广应用提供了一定的参考依据。     

水工钢闸门喷锌防腐质量控制

水工钢闸门喷锌防腐工艺要点，用铁砂喷砂除锈优于石英砂，节约成本，提高工效，提出“总量控制，定位定量，局部加工”的喷锌方法的优越性，以及传统锌层厚度控制及质检方法的缺点。     

水工钢闸门防腐维修情况调查及低表面处理涂料的应用前景

通过对华东地区水工钢闸门喷锌加涂料复合涂层防腐调查,得出各种自然环境条件,钢材的表面处理,涂层的配套、工艺等均与其防腐周期的长短有密切关系。对复合涂层在复涂维修时存在的缺陷进行分析,对低表面处理涂料在复涂维修中的应用前景作了展望。     

浅析水工钢闸门防腐失效因素和机理

水工钢闸门作为水利工程建筑的重要组成部分,其日常的防腐蚀维护工作不可忽视。本文对不同运行环境下的水工钢闸门的腐蚀情况及失效机理进行分析探究,研究水工钢闸门防腐失效原因,从而探索提升水工钢闸门防腐效果的途径,减少因防腐失效造成的经济损失。     

环保型低表面处理环氧厚浆涂料在水工钢闸门防腐维修中的应用分析

针对水工钢闸门防腐维修中存在的施工粉尘锌尘污染和涂料毒性污染问题，分析了环保型低表面处理环氧厚浆涂料作为高固体分溶剂型涂料的环保优势。通过该涂料在江苏省扬州市万福闸淡水环境闸门的试点应用和 7a的跟踪观察，用外观检查和数据检测分析了该试点涂层在淡水环境中的良好耐久性能。为了使该类型涂料适用于各种复杂环境，进一步对该涂料进行性能提升研究，升级后的涂料将在江苏省海水污水环境钢闸门防腐维修中试用并跟踪观察，以验证其对此类环境的适用性。环保型低表面处理涂料可做到绿色涂料、绿色涂装，在水工钢闸门防腐维修中的应用前景可瞻。     

涂层—牺牲阳极法在水工金属防腐中的应用

介绍了涂层－牺牲阳极在水工钢闸门防腐中联合保护的原理及其应用实例。     

涂层-牺牲阳极法在水工金属防腐中的应用

介绍了涂层-牺牲阳极在水工钢闸门防腐中联合保护的原理及其应用实例.     

HBL防腐胶液的试制

一、前言水工钢闸门由于长期裸露于自然界或浸渍于水中,不仅受到天候、电化学腐蚀作用,而且还要承受高压、高速水的冲击以及泥砂磨损和气蚀等方面的破坏作用。水工闸门更换比较困难,如果不很好保护,就会影响水工建筑的安全运行和使用寿命。因此,提高建筑物防腐周期,减少人力、物力消耗,降低成本,延长金属结构使用年限,是当前需要认真解决的大问题。目前,国内外钢闸门的防腐方法,主要有喷锌防腐和油漆防腐两种。喷锌防腐效果较好,但技术要求严格,设备较复杂,材料造价较     

埋地输油管道玻璃钢防腐层施工工艺改进

埋地输油管玻璃钢防腐层的生产工艺流程对管道防腐质量影响较大,针对大庆油田玻璃钢防腐涂层的生产工艺流程特点,对排列缠绕纱、树脂混合液、参数设置、成型控制等环节上的工艺方法进行了改进,经过实践证实了这些改进的方法在有效的的控制玻璃钢防腐管防腐涂层的质量的同时可以节省原料并能极大提高工作效率,对同类产品的生产和质量控制有着借鉴意义。     

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.     

ICP-MS法测定地球化学样品中As、Cr、Ge、V等18种微量痕量元素的研究

建立了测定地球化学样品中包括As、Cr、Ge、V等18种微量、痕量元素的ICP-MS方法。地化试样用HF-HNO3混酸分解后,以1 1 HNO3溶解干渣。由于制样不使用盐酸,避免了Cl对As、Cr、Ge、V的质谱干扰。用国家一级地球化学标准物质GBW 07309制备溶液优化仪器工作参数,并用于校准。方法测定限(6s)为:0.007~6.4μg/g,精密度(RSD%,n=12)为:29%~9.4%,经过国家一级地球化学标准物质的分析验证,结果与标准值吻合。方法已应用于国土资源调查的试样分析。     

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.     

基于ATRP法制备的触角状亲水性羟胺树脂的吸硼性能的研究

以大分子引发剂氯乙酰化聚苯乙烯微球(PS-acyl-Cl)经原子转移自由基聚合(ATRP)法引发丙烯酰胺(AM)和甲基丙烯酸缩水甘油酯(GMA)单体的共聚接枝,制得一种触角状亲水性环氧载体(PS-acyl-g-P(AM-co-GMA)),再经二乙醇胺(DEA)的环氧基开环胺化反应,得到一种含多个-NCH2CH2OH螯合配基的多齿-五元螯合环的触角状亲水性羟胺树脂(PS-acyl-g-P(AM-co-GMA)-DEA)。将此树脂用于硼吸附研究,结果表明,PS-acyl-g-P(AM-co-GMA)-DEA树脂对硼的吸附满足Langmuir方程,为单分子层吸附;饱和吸附量约为37.7 mg·g-1,且树脂5 min即可达到吸附平衡,与其它已报道的吸硼树脂相比,该树脂具有更高的吸附量和吸硼速率。吸附动力学研究表明,树脂吸附硼的过程主要由颗粒扩散过程控制。重复使用5次后该树脂的吸附量基本不变,解吸率均在90%以上,重复使用性能良好。