TZP(Al_2O_3)质泡沫陶瓷过滤器

研究了TZP（A12O3）材质泡沫陶瓷过滤器的制备工艺。结果表明，泡沫陶瓷过滤器的烧结滞后于普遍压制成型的试块，于1550℃左右烧成的过滤器强度可达1．5MPa；过滤器加热至1100℃保温数分钟空冷后，强度有回升现象。产生上述现象的机理有待于进一步分析。     

汽车柴油机排气颗粒泡沫陶瓷过滤器的研制

着重论述了汽车柴油机排气颗粒泡沫陶瓷过滤器滤芯的性能要求，确定了泡沫陶瓷过滤器的配方、工艺和结构。所制得泡沫陶瓷的性能：抗弯强度为1．5MPa；膨胀系数为2．89×10－6／K－1；耐温性为1300℃．用此泡沫陶瓷做成的滤芯碳颗粒过滤效率为50％左右。根据台架试验与性能检测结果数据，集中讨论了工艺、添加剂和滤芯结构的影响。     

精炼精密合金用陶瓷过滤器的制造工艺及试验

制定了高铝质、方镁石质和硅质陶瓷过滤器的制造工艺,过滤器的直径１３０ｍｍ、厚度２０－４０ｍｍ气孔尺寸１－５ｍｍ,气孔率７５％。试验了过滤器过滤液态金属的能力,过滤器的最佳气孔尺寸为３－５ｍｍ,预热温度为９５０－１０００℃。     

美国Ashland Casting Solutions公司：蜂窝陶瓷过滤器

美国Ashland Casting Solutions公司推出一种蜂窝陶瓷过滤器，具有如下特点：材质：氧化铝／氧化硅；规格：37～81mm；孔形：方形或三角形；孔数：100～300孔／平方英寸；使用温度：1455℃等，可用于分别用于铝、灰铁以及其他有色金属的冶炼滤杂。     

细粉粒用的高效过滤器

<正> 日本住友电气工业公司开发了一种新型聚四氟乙烯(PTFE)过滤器,它的气体流速为传统过滤器的3～4倍,对细粉粒的过滤效率高。这种过滤器的市场是半导体(洁净室)、生物技术和医学工业。由于它将使洁净室的所量显著提高,其主要市场将集中在这个领域。 新过滤器的孔隙直径范围为0.01～0.1μm,过滤器能承受高达260℃温度。每min每cm~2气体流速增加到传统过滤器的3～4倍。虽然普通过滤器的微粒过滤效率随气体流速     

直纺涤纶长丝熔体输送温度波动原因及处理

洛阳石油化工总厂聚酯装置采用杜邦技术；直纺涤纶长丝装置采用日本东丽公司技术。从聚酯终聚釜出来的熔体经过熔体冷却器、熔体过滤器后送至长丝装置的熔体分配四通阀，再经3台熔体增压泵增压后送至12条长丝生产线。从熔体四通阀至12条生产线的分配管线之间的熔体管道的保温热媒是长丝装置的3台热媒脱过热器提供。熔体输送温度一般控制在285℃左右。2000年开工至今，曾经发生熔体输送系统温度较大的波动，熔体温度较大的波动影响产品质量，甚至可能造成增压泵跳停事故。     

活性炭在饮用水处理中的应用(三)

４．２颗粒活性炭处理 以颗粒活性炭为过滤介质的活性炭过滤器广泛应用于家用活性炭净水器、集团用活性炭净水器；蒸馏水生产，膜法生产纯水都需要活性炭过滤器作为原水的预处理设备，一般活性炭过滤器设备简单，都为长圆筒形的压力过滤器，自来水厂中的活性炭滤池则与一般砂滤     

陶瓷颗粒质陶瓷过滤器的研究

本文着重介绍了以废陶瓷制成的颗粒为骨料生产陶瓷过滤器的工艺，并讨论了与气孔相关的主要因素。结果表明，经１２５０℃烧成的陶瓷过滤器空隙率为４０％，过滤效果良好。     

齐鲁石化工程有限公司开发出异戊橡胶胶乳脱气气体分离工艺及系统

<正>山东齐鲁石化工程有限公司开发出一种异戊橡胶胶乳脱气气体分离工艺及系统。它是将除掉脱气气体夹带胶粒后的气体降温至60℃,全部冷凝为液体;将冷凝液降温至45℃,然后再进行己烷、异戊二烯和水的分离。分离系统包括脱气釜、釜顶过滤器、分离塔,釜顶过滤器通过管线连接脱气釜顶部,釜顶过滤器通过管线连接釜顶冷凝器,釜顶冷凝器通过管线连接粗溶剂油冷却器,粗溶剂油冷却器通过管线连     

陶瓷过滤器

<正> 法国PPS推出一种以碳化硅为材料的新型瓷陶过滤器,具有优良的耐化学腐蚀性能,耐温高达300℃,并且能耐高压。新型陶瓷过滤器不需特殊维修和保养。     

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.     

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.     

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.     

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。