微波诱导催化剂Fe2O3／沸石氧化处理印染废水

以自制改性沸石为催化剂，通过微波诱导氧化技术，对活性嫩黄模拟废水进行氧化处理。采用尿素均匀沉淀包裹法制备Fe2O3／沸石微波诱导催化剂。利用SEM、XRD、IR等分析手段分别对催化剂的表面形态、物相结构等特性进行表征。实验考察了催化剂用量、微波辐射时间、微波辐射功率对活性嫩黄废水的降解效果。结果表明：在催化剂用量3g／L、微波功率900W、辐射时间4min的条件下，对50mg／L活性嫩黄的处理率达到97％。     

基于改进层次分析法的化工园区应急能力评估研究

本文采用诱导矩阵的方法对层次分析法进行改进，并将整个计算过程计算机程序化。再利用改进的层次分析法计算出化工园区应急能力各因素的权重。最后根据各因素权重以及各因素的打分情况得到园区的应急能力等级。结果表明：对改进的层次分析法程序化会提高分析速度和精度，并且通过各因素权重分析，对园区的应急能力的改善提出针对性建议。     

Ⅲ型储氢气瓶内胆6061-T6铝合金的氢致损伤研究进展

基于在多次循环充、放氢过程中,Ⅲ型储氢气瓶6061-T6铝合金内胆内部结构中渗入氢,从而导致性能衰减,影响气瓶服役安全可靠性,文中从氢渗透损伤、高压气体渗氢、溶液渗氢等几个方面综述了国内外开展包括6061铝在内的铝及铝合金中氢渗透行为及对铝合金拉伸力学性能、疲劳性能的影响的研究进展.简述了采用高压气体渗氢及溶液渗氢开展氢致损伤机理研究的优缺点.最后提出相比于高压气体渗氢,溶液渗氢在合金氢渗入量及渗氢效率上具有优势,且工艺简单,建议在开展Ⅲ型储氢气瓶氢致损伤机理及可靠性评价研究时采用.     

阿油槽岩溶塌陷浅析

文章阐述分析了阿油槽地区岩溶塌陷的水文地质背景,对该地区产生岩溶塌陷的基本条件、诱发因素及形成过程进行了分析,并针对其具体情况提出了岩溶防治及治理的措施.     

Cobalt and manganese stress in the microalga Pavlova viridis （Prymnesiophyceae）： Effects on lipid peroxidation and antioxidant enzymes

Pollution of marine environment has become an issue of major concern in recent years.Serious environmental pollution by heavy metals results from their increasing utilization in industrial processes and because most heavy metals are transported into the marine environment and accumulated without decomposition.The aim of the present study is to investigate the effects on growth,pigments, lipid peroxidation,and some antioxidant enzyme activities of marine microalga Pavlova viridis,in response to elevated concentrations of cobalt(Co)and manganese(Mn),especially with regard to the involvement of antioxidative defences against heavy metal-induced oxidative stress.In response to Co~(2 ),lipid peroxidation was enhanced compared to the control,as an indication of the oxidative damage caused by metal concentration assayed in the microalgal cells but not Mn~(2 ).Exposure of Pavlova viridis to the two metals caused changes in enzyme activities in a different manner,depending on the metal assayed:after Co~(2 )treatments,total superoxide dismutase(SOD)activity was irregular,although it was not significantly affected by Mn~(2 )exposure.Co~(2 )and Mn~(2 )stimulated the activities of catalase(CAT)and glutathione(GSH),whereas,ghitathione peroxidase(GPX)showed a remarkable increase in activity in response to Co~(2 )treatments and decreased gradually with Mn~(2 )concentration,up to 50μmol/L,and then rose very rapidly,reaching to about 38.98% at 200μmol/L Mn~(2 ).These results suggest that an activation of some antioxidant enzymes was enhanced,to counteract the oxidative stress induced by the two metals at higher concentration.     

近海海洋大气颗粒物中元素浓度及粒径分布研究

本工作用质子激发Ｘ荧光分析光测定近中国海域上空不同粒径大气颗粒物中１４个元素的浓度、粒径分布及富集因子。研究发现，在开阔海域大气污染元素和地壳元素主要来自亚洲大陆长距离输送的贡献，海水元素浓度受海盐气溶胶的控制，估算近中国海域大气中的尘土量为０．４－２．３μｇ／ｍ＾３，尘土粒子的输入量控制着海洋大气颗粒物中地壳元素浓度。     

Characteristics of Resuspension,Settling and Diffusion of Particulate Matter in a Water Column

Experiments were conducted in order to characterize the distributions of concentrations of suspended particulate matter (SPM) in water columns of lakes and reservoirs. The experiments, in a reduced model of the water column, used a set of oscillating grids. Runs were done with particles denser than water as well as with light particles. The results were in good agreement with analytical solutions for steady-state, and non-steady-state conditions. An approximate analytical solution was derived and found to be in agreement with the full solution. The threshold for resuspension was measured, and characterized in terms of a modified Shields parameter, which is appropriate to a zero-shear environment. All experiments showed that the distribution of SPM exhibited a layer near the bottom that is thought to be analogous to the benthic nepheloid layer (BNL) observed in larger lakes. The thickness of the nepheloid layer increases with the turbulence intensity.     

油菜素内酯诱导黄瓜幼苗抗灰霉病研究

采用根际注射结合叶面喷施的方法,研究了油菜素内酯(Brassinolide,BR)对黄瓜灰霉病的诱抗作用及其生理机制.结果表明,BR降低了黄瓜幼苗的病情指数,最高幅度达28.4%,提高了苯丙氨酸解氨酶(PAL)、过氧化物酶(POD)和多酚氧化酶(PPO)活性,增加了木质素和类黄酮含量,促进了灰霉病菌侵染下黄瓜幼苗的生长发育,壮苗指数最高增加了23.4%.说明BR能诱导黄瓜幼苗对灰霉病的抗性,且最佳处理浓度为0.05mg/L.图3表1参28     

Receptor neurones in three heliothine moths responding to floral nd inducible plant volatiles

Summary. Some plant volatiles are produced in response to herbivory of several insect species, including heliothine larvae. In the present study of female heliothine moths, four co-located receptor neurone types were identified, of which three types responded strongest to the inducible compounds E--ocimene, E,E--farnesene and E,E-TMTT, respectively. The fourth type responded strongest to geraniol, which is a common floral volatile. The narrow tuning of each receptor neurone type was demonstrated by responses to a few structurally-related monoterpenes, sesquiterpenes, homo-terpenes and monoterpene alcohols, respectively, out of hundreds of plant constituents tested. The four neurone types showed the same relation of spike amplitudes and ranking of effective compounds in the three heliothine species; the polyphagous Heliothis virescens and Helicoverpa armigera and the oligophagous Helicoverpa assulta. The results indicate the presence of functionally similar types of plant odour-receptor neurones in the three related species, and suggest conservation or reappearance of functionally similar olfactory receptors in related species, independent of the evolution of polyphagy and oligophagy.     

THK引气气浮系统的研制与应用

在引进美国THK系统基础上，通过对THK系统的研究，消化和吸收，已实现THK的国产化生产，目前，国产化水平已达到80％－90％。工业废处理应用表明，THK是一种简单，节能和高效的气浮设备，非常适合在我国推广应用。