浙江省工业循环经济典型推进模式研究

浙江省在经济快速发展的同时,资源环境的约束越来越明显,发展循环经济成为浙江经济转型升级,实现可持续发展的必由之路。省内各县市结合自身特点,在大力推进工业循环化发展中,呈现出传统产业集聚提升、优势产业补链延伸、静脉产业整合改造三种典型的推进模式。依托良好的市场竞争环境、产业集聚的规模效应、循环经济技术的不断进步和绿色政策的有力保障,浙江省工业循环经济的发展态势良好,对中国工业循环经济的推进发展具有一定的启发和示范意义。     

Iridodial: a powerful attractant for the green lacewing, Chrysopa septempunctata (Neuroptera: Chrysopidae)

The lacewing Chrysopa septempunctata Wesmael is an important, common predator of several insects in China, Japan, Russia, and many parts of Europe. Our field trapping experiments in northeast China showed that males of this green lacewing are strongly attracted to the lacewing pheromone of Chrysopa oculata Say, (1R,2S,5R,8R)-iridodial. The induced plant volatile, methyl salicylate, was unattractive to C. septempunctata by itself at the concentration tested, but synergistic when combined with iridodial where the lacewing population was high. (1R,4aS,7S,7aR)-Nepetalactol and (4aS,7S,7aR)-nepetalactone (aphid sex pheromone components) caught significantly more males of C. septempunctata than did blank control traps, but were inferior to iridodial dispensers, which remained strongly attractive to C. septempunctata males for at least 2.5 months. These results indicate that (1R,2S,5R,8R)-iridodial is a powerful attractant for C. septempunctata, and may have great potential for enhanced biological control of garden, agricultural, and forest insect pests.     

Effects of metsulfuron-methyl on the microbial population and enzyme activities in wheat rhizosphere soil

The effects of metsulfuron-methyl, a sulfonylurea herbicide, on the wheat soil microorganisms were evaluated by the methods of microbial inoculation culture, and the activities of three enzymes were measured using the colorimetric method. The tolerant microorganisms that can resist 500 microg x g(-1) metsulfuron-methyl in the counting culture medium were studied specially. Metsulfuron-methyl distinctly inhibited the common aerobic heterotriphic bacteria, but the effects on common fungi and common actinomycete were not evident. In the meantime, the number of tolerant fungi increased greatly in the rhizosphere after the application of metsulfuron-methyl in contrast to the significant decrease of the amount of tolerant actinomycete. It indicates that fungi might turn into the dominant microbial type and actinomycete is the sensitive factor in the soil polluted by sulfonylurea residues. The population of aromatic compounds-decomposing bacteria, aerobic azotobacter, and nitrite bacteria all increased in the earlier period, but the aerobic azotobacter decreased rapidly in number 30 days later, and the amount of nitrite bacteria also showed a temporary decrease with time 15 days later. However, the denitrifying bacteria just began to increase significantly after the crops had grown for 50 days. The amount of sulfur-oxidizing bacteria gradually decreased with the growth of crops, and so were the sulfate-reducing bacteria after metsulfuron-methyl application. To all types of microorganisms, there were more microbes in rhizosphere samples than those in nonrhizosphere except aerobic azotobacter. It means the growth of wheat root system can stimulate the growth of most microorganisms. The activities of hydrogen peroxidase and polyphenol oxidase in soil samples after metsulfuron-methyl application were notably lower than those in the control, and the difference of the activities between the samples of rhizosphere and nonrhizosphere was evident. On the contrary, the activity of dehydrogenase was not inhibited by the application of metsulfuron-methyl, and the rhizosphere effect was not obvious either.     

剑湖流域土壤/沉积物重金属分布特征、来源解析及生态风险

以剑湖流域为研究对象,通过系统采集流域内陆地土壤、河流和湖泊沉积物样品,利用电感耦合等离子体发射光谱仪(ICP-OES)测定72个采样点镉(Cd)、铬(Cr)、铜(Cu)、铅(Pb)、钒(V)和锌(Zn)等6种重金属含量,分析流域重金属分布特征,利用单因子污染指数法和内梅罗综合污染指数法、地累积指数法评估其污染程度,利...     

炼化企业实施职业健康监护项目与周期研究

从现行规范存在的问题入手,提出了确定炼化企业职业健康监护项目与周期的建议,旨在科学合理地指导炼化企业职业健康监护工作的运行操作。     

华东电网超超临界CDM项目CO2减排量研究

介绍了燃煤电厂超超临界CDM类型项目CO2减排量的理论计算过程，说明各参数的取值方法，并结合华东电网超超临界CDM项目案例给予演示，最后就减排问题对CDM项目的开发提出了建议。     

城市交通环境空气质量评价的灰色层次方法

本文分析了城市交通环境空气影响因素,提出了一套评价指标体系,并应用灰色理论和层次分析法建立了环境空气质量评价的灰色层次评估法。     

乌江水污染调查

乌江是长江上游重要的支流之一。对比多年乌江水质监测结果 ,乌江水质总体能满足地表水 类水质要求。经调查 ,乌江近几年春季多次发生水体变黑 ,通过对乌江 2 0 0 1年 3月发生的水污染调查表明 ,总磷浓度从乌江上游到下游有逐渐降低的趋势 ,水体变黑的主要原因可能是由于城区江段有较高的 N、P背景 ,而乌江上游水库排水造成 ,水体中 chl-a含量按 OECD标准评价达到富营养化水平     

冷拔无缝钢管爆裂分析

在无缝钢管的冷拔过程中,存在着冷作硬化和氢脆现象,它们是造成钢管爆裂的主要原因。此文对两个现象进行了分析,提出了一些防止钢管爆裂的措施。     

地球化学动力学反应器原理和速率方程测定

主要介绍了地球化学动力学实验研究中的三种反应器类型，即间歇反应器、活塞流反应器和混合流反应器，概述了它们的工作原理和速率方程测定方法，最后对比了三类反应器的性能，指出混合流反应器最适合于测定矿物－水反应速率。