温度对IMO-SBR中微生物特性的影响

为了研究温度对固定化微生物系统中微生物特性的影响,将微生物固定化技术与SRB工艺相结合,开发出IMO-SBR(Immoblization Organism简称IMO)生物强化工艺处理含氮废水,并通过对IMO-SBR和普通活性污泥SBR废水处理对比试验,研究了温度对固定化微生物系统及游离微生物系统中微生物活性、脱氮效果的...     

污水厌氧处理微生物的固定化方法及硬化处理

本文阐述了污水厌氧处理微生物的固定化方法及硬化处理的试验研究。正交试验结果表明,经胺处理及醛交联后的固定化微生物的酶活力,强度及稳定性均是令人满意的。试验经过半年的连续运转,粒子性能仍然完好。     

多孔悬浮陶瓷载体的挂膜试验研究

固定化多孔悬浮陶瓷载体的挂膜废水处理工艺吸收了传统活性污泥法、生物接触氧化法和生物流化床三种工艺优点,以预固定微生物的多孔悬浮陶瓷作为挂膜载体,用泡沫陶瓷板作曝气头进行底层曝气挂膜试验。模拟废水处理试验表明：COD降解率较空白载体的提高6.58%。     

微生物固定化技术的研究与应用

微生物固定化技术因其独特的优越性成为了环境保护及水处理领域的研究热点。从微生物固定化技术的发展和应用角度,重点阐述了微生物固定化技术的基本方法,固定化机理,固定化特性及固定化技术的优越性;并简述了微生物固定化技术的应用领域、存在的问题及未来发展方向。     

生物固定化技术研究及应用评述

综述了固定化微生物的制作方法及载体的选择。微生物经固定化后的反应特性与游离状态有很大差别。例举了最近固定化技术在废水与废气处理方面的研究与应用，并对固定化技术的应用前景及存在的问题进行了评述。     

固定化法降解石油方法研究

本文对固定化微生物技术、微生物的固定化方法、固定化载体及固定化技术在石油降解中的应用及研究进展状况进行了综述,同时展望了上述研究领域今后预期的主要研究方向。     

多孔陶瓷的微生物固定化性能分析及探讨

针对生物固定化技术及其在废水处理的工程应用中常见的问题，结合多孔陶瓷制备技术的发展状况，论述了作为生物固定化载体的多孔陶瓷应具备的性能及其改进措施，说明了多孔陶瓷固定化生物的各种机理，指出了多孔陶瓷固定化生物技术的发展趋势．即实现连续处理和生产设备小型化。     

固定化脱氮菌在低污染水处理中的应用研究

随着水体氮素污染日趋严重,脱氮技术的改进及强化方法成为研究热点。固定化微生物技术因具有微生物密度大、处理效率高、反应速度快、适应能力强等优点而备受关注。综述了不同固定化载体及方法对生物脱氮的强化效果,分析了固定化作用对微生物的影响,总结了固定化技术脱氮应用的最新研究进展,并对该领域今后的发展进行探讨。     

聚氨酯固定化微生物处理医院污水

本文用聚氨酯材料为载体固定化污泥厂筛选驯化出的好厌氧菌群,并以传染病医院污水为原水,研究了游离菌群、聚氨酯载体与聚氨酯固定化微生物对传染病医院污水处理效果。结果表明,原水的pH值在6～9时,固定化微生物处理污水效果均好于游离菌群和单载体,pH为7时其浊度与COD去除率分别达到了97%和94%以上,经消毒处理后,原水水质达到了排放标准。     

BOD生物传感器微生物固定化技术研究进展

综述了微生物固定化技术在BOD微生物传感器上的研究应用进展，重点讨论了固定化微生物寿命和稳定性影响因素。     

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.     

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.     

Novel polyurethane coating technology through glycidyl carbamate chemistry

Glycidyl carbamate chemistry combines the excellent properties of polyurethanes with the crosslinking chemistry of epoxy resins. Glycidyl carbamate functional oligomers were synthesized by the reaction of polyfunctional isocyanate oligomers and glycidol. The oligomers were formulated into coatings with several amine functional crosslinkers at varying stoichiometric ratios and cured at different temperatures. Properties such as solvent resistance, hardness, and impact resistance were dependent on the composition and cure conditions. Most coatings had an excellent combination of properties. Studies were carried out to determine the kinetics of the curing reaction of the glycidyl carbamate functional oligomers with multifunctional and model amines. Detailed kinetic analysis of the curing reactions was also undertaken. The results indicated that the glycidyl carbamate functional group is more reactive than a glycidyl ether group. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, on October 27–29, 2004, in Chicago, IL.