珠海市凤凰河排洪渠水质现状调查分析

城市排洪渠作为城市河道的重要组成部分,对城市的生态环境建设和优化有着重要的意义。本课题组对珠海市主要的排洪渠--凤凰河排洪渠进行采样监测,分析该渠的水质参数,运用单因子评价分析、主分量分析法和有机污染综合指数评价法对凤凰河排洪渠进行水质评价,并针对其水质问题提出改善意见,以期为今后凤凰河排洪渠改造治理提供参考。     

软围隔截污-MBR膜生物反应器复合技术应用研究

针对观景苑内浜的黑臭水体,创新性地采用了软围隔河道内截污技术,辅以MBR膜生物反应器岸上强化技术、河道原位反应器生态修复技术和底泥疏浚技术对水体进行治理。运行结果显示河道水COD削减率28%～69%,氨氮削减率高达90%～97%,总磷削减率78%～87%。彻底消除了观景苑内浜的重度黑臭,将水质提升到地表水环境质量标准V类(GB3838-2002)。观景苑内浜治理工程投资107.40万元,年运行费用约10.22万元。     

消息传递

凤凰胶带公司发展势头强劲山西凤凰胶带有限公司最近在太原召开了产品推广暨技术交流会,会议成功地促进了最终用户对凤凰产品的了解以及面对面的洽谈和合作。凤凰胶带公司成立于1998年。2002年10月,德国凤凰集团公司与中国潞安矿业集团公司、晋城煤业集团公司强强联合,三方共投资6900万元,对该公司进行了资产重组,并计划在两年内再投资8000万元。纯正的德国生产技术,雄厚的资金和强大的企业品牌,为山西凤凰公司的发展提供了得天独厚的条件。截至今年上半年,公司PVC带的产量同比增长了54.4%,分层带增长了34.7%;销售收入3116万元,同比增长了…     

丙烯醛水合加氢法生产1,3-丙二醇过程模拟与技术经济分析

基于丙烯醛水合加氢法制1,3-丙二醇(PDO)的小试和中试结果,应用SuperPro Designer?模拟软件,建立年产万吨PDO的工业放大过程模拟,并进行技术经济分析. 结果表明,主要过程数据符合实验结果,工艺模拟设计合理;经济分析显示,原料成本占生产成本49%,设备购置费用约2242万元,总投资约15088万元,年税后净利润约4256万元,投资回收率28.21%.     

生物接触氧化用于河道治理的快速启动性能研究

为研究人工强化河道处理技术——生物接触氧化工艺处理河道污水的能力,实现治理条子河的目的,采用砾石和火山岩填料作为微生物载体并利用稀释后的生活污水模拟河道污水.对工艺的的挂膜启动进行了研究,分析了启动过程中的生物相及对COD、NH4+-N的去除效果.结果表明,在水温11～16℃时,2个反应器启动30d时,对COD和NH4+-N、TN的去除率分别稳定在80％和70％、50％以上,且生物相趋于稳定时,标志着系统启动成功.     

补偿资金逐步减少 水环境质量不断提升 江苏区域补偿倒逼地市主动治污

正扬州新城河是扬州城区一条流域较广的内河,污染治理多年,但水质一直难有较大提升,原因在于河道流经区域多,治理主体繁多,维护盲点多。为治理新城河,扬州市确定了水质交接和双向补偿方案。今年4月起,如果河流上游水质达标,下游的扬州市经济开发区每月将补偿上游的邗江区10万元;如果上游不达标,邗江区将按污染物超标倍数向开发区补偿5万~10万元。     

上海郊区4000条黑河道换“新妆”

自2006年3月上海郊区“万河整治行动”启动以来，截至目前，全市各郊区已完成4000余条、总长达3548公里镇村级河道的整治．清除河道淤泥3918万立方米。日前市水务局局长张嘉毅在接受记者采访时表示，今年全市河道整治累计投入23亿元。目前全市污水处理率已由上世纪末的40．3％提高到目前的70．2％，居全国领先水平。“十一五”期间，将投入资金上百亿元治水．要实现全市污水处理率达到80％的目标。     

黑臭河水体治理技术研究现状与进展

在比较3种传统的物理、化学和生物治理黑臭河道水体技术的优点和局限性的基础上,阐述了MBR膜法、高级氧化技术、阿科蔓生态基技术、矿化还原治理技术等黑臭河治理新技术的开发和应用现状,以及预估米拉碳纤维水质净化技术和MSC工法在未来黑臭河治理中的走向,并对黑臭河治理新技术及其发展趋势进行了展望,认为应以建立和恢复具有生物多样性的生态系统结构为原则,将一些工业废水或生活污水处理的方法经过整合改进与不断创新,借鉴并融合成为综合性的"化学+物理吸附+生物(或微生物)修复"综合技术;充分重视并利用多介质的修复技术、低维纳米材料的矿化还原技术、碳纤维水质净化技术+MSC工法等,并结合零直排、雨污分流、海绵城市等工程措施进行黑臭河道的治理。     

章党河流域污染治理方案研究与应用

在对章党河流域污染现状调查的基础上,制定了章党河流域污染治理方案,并进行治理工程建设。投资5 968万元,采用A2O+纤维转盘深度处理工艺,建设日处理能力2万t污水的章党污水处理厂,同时进行污染截流管网工程建设,彻底解决了章党河流域污染难题。     

生态滤墙与仿生水草复合提升入库河段水质技术应用

梁西河是大沙河草庙水源地进水通道,而大沙河草庙水源地李口涵闸入库河口区COD_Mn、氨氮和TP指标超标,极大地影响了大沙河草庙水源地保护区水质。该工程采用生态滤墙+仿生水草结合的综合处理技术,同时为保障泄洪需要,生态滤墙额外配置旋转系统,确保泄洪安全的同时保障水质达标。运行结果表明主要污染物COD_Mn、氨氮和TP的去除率为44.0%～60.4%、50.0%～66.7%和46.7%～70.0%,整体处理效果还是比较显著的,而且出水水质效果优于《地表水环境质量标准》(GB 3838—2002)III类,技术上是可行的,适合于需要行洪时河道的水质提升工程。同时,工程总投资费用为493.18万元,运行维护费用费用约为28.5万元/a,整体经济投资和运行费用是可行的。     

Reactions in Stabilizer and Between Stabilizer and Nitrocellulose in Propellants

HPLC analysis of the stabilizer is one of the major methods in use for surveillance testing of diphenylamine (DPA) stabilized propellants. Often 0.2% DPA is used as a minimum content for safe propellants. In most cases the propellant can be stored much longer after this limit has been reached without any risk for self‐ignition. We report here about a reaction where DPA bonds to nitrocellulose, leaving a non extractable aromatic stabilizing compound left in the propellant, resulting in a longer time to autocatalysis than predicted. Diphenylnitramine is discussed as a possible intermediary compound occurring from the reaction between DPA and nitrocellulose. This should add to a better understanding of the degradation processes in propellants.     

Differences in color naming and color salience in Vietnamese and English

The accepted model of color naming postulates that 11 “basic” color terms representing 11 common perceptual experiences show increased processing salience due to a theorized linkage between perception, visual neurophysiology, and cognition. We tested this theory, originally proposed by Berlin and Kay in 1969. Experiment 1 tested salience by comparing unconstrained color naming across two languages, English and Vietnamese. Results were compared with previous research by Berlin and Kay, Boynton and Olson, and colleagues. Experiment 2 validated our stimuli by comparing OSA, Munsell, and newly rendered “basic” exemplars using colorimetry and behavioral measures. Our results show that the relationship between the visual and verbal domains is more complex than current theory acknowledges. An interpoint distance model of color‐naming behavior is proposed as an alternative perspective on color‐naming universality and color‐category structure. © 2003 Wiley Periodicals, Inc. Col Res Appl, 28, 113–138, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/col.10131     

中国台湾的催化和催化剂的研究开发

本文重点介绍了台湾省各大学和研究院所对催化及催化剂的教学。研究与开发方面动向,相关催化方面学科带头人的研究领域和主要成果,并给出大量参考文献。     

Designer enzyme and cell applications in industry and in environmental monitoring

Renewed world interest in enzyme biotechnological industries now derives from the expectation that many new biocatalysts will be created by genetic engineering associated with protein engineering designer techniques, or by chemical modification of existing enzymes by use of protein tailoring methods. The biocatalysts produced are mainly enzymes, abzymes (catalytic antibodies) and synthesis (synthetic analogues or mimics), and these will be used in industry, synthesis, therapy: and in bioanalysis of components of foodstuffs, and the environment including water, air and soil. The biocatalysts, including whole cells, are firstly incorporated into a particular bioreactor form by use of enzyme engineering techniques such as immobilization, and are then used, as appropriate, to modify their substrates. Improved processing or enhanced products are thereby achieved in the case of manufacturing industry: or monitoring signals are generated, often in the form of a measurable change in current flow, in the case of environmental biosensors. Designer enzymes and cells can be made now for identified applications where the presently available biocatalysts are inadequate, incompatible or uncompetitive.     

EZH2 Down-Regulation Exacerbates Lipid Accumulation and Inflammation in in Vitro and in Vivo NAFLD

Non-alcoholic fatty liver disease (NAFLD) is one of the most prevalent, chronic liver diseases, worldwide. It is a multifactorial disease caused by complex interactions between genetic, epigenetic and environmental factors. Recently, several microRNAs, some of which epigenetically regulated, have been found to be up- and/or down-regulated during NAFLD development. However, in NAFLD, the essential role of the Polycomb Group protein Enhancer of Zeste Homolog 2 (EZH2), which controls the epigenetic silencing of specific genes and/or microRNAs by trimethylating Lys27 on histone H3, still remains unknown. In this study, we demonstrate that the nuclear expression/activity of the EZH2 protein is down-regulated both in livers from NAFLD rats and in the free fatty acid-treated HepG2. The drop in EZH2 is inversely correlated with: (i) lipid accumulation; (ii) the expression of pro-inflammatory markers including TNF-α and TGF-β; and (iii) the expression of miR-200b and miR-155. Consistently, the pharmacological inhibition of EZH2 by 3-Deazaneplanocin A (DZNep) significantly reduces EZH2 expression/activity, while it increases lipid accumulation, inflammatory molecules and microRNAs. In conclusion, the results of this study suggest that the defective activity of EZH2 can enhance the NAFLD development by favouring steatosis and the de-repression of the inflammatory genes and that of specific microRNAs.     

讲授中有研究，学习中有运用

本文从化学反应工程分析的讲授体会出发,分析探讨了硕士学位课程的性质,讲授过程中教材的选取、内容和方法的把握,以及如何根据学生的具体情况,采用更有针对性的课堂讲解的议题。     

泥火中的人与马

陶瓷首饰是伴随着社会发展和文化背景诞生出来的.本人运用陶瓷艺术创作的方式把陶泥作为原材料制作出人与马系列的陶瓷首饰吊坠,分别以《人与马的战争》、《人与马的迁徙》、《人与马的生活》三个系列作为创作内容,赋予了陶瓷首饰丰富的文化内涵和浓郁的人文气息.