Simultaneous denitrifying phosphorus accumulation in a sequencing batch reactor

In order to achieve simultaneous nitrogen and phosphorus removal in the biological treatment process, denitrifying phosphorus accumulation (DNPA) and its affecting factors were studied in a sequencing batch reactor (SBR) with synthetic wastewater. The results showed that when acetate was used as the sole carbon resource in the influent, the sludge acclimatized under anaerobic/aerobic operation had good phosphorus removal ability. Denitrifying phosphorus accumulation was observed soon when fed with nitrate instead of aeration following the anaerobic stage, which is a vital premise to DNPA. If DNPA sludge is fed with nitrate prior to the anaerobic stage, the DNPA would weaken or even disappear. At the high concentration of nitrate fed in the anoxic stage, the longer anoxic time needed, the better the DNPA was. Induced DNPA did not disappear even though an aerobic stage followed the anoxic stage, but the shorter the aerobic stage lasted, the higher the proportions of phosphorus removal via DNPA to total removal. Translated from Environmental Science, 2004, 25(6): 92–96 [译自: 环境科学]     

遥测网络系统的抗干扰与设计

讨论了遥测网络系统的原理与设计；介绍了以可编程序控制器（ＰＬＣ）为核心的城市大气质量遥测系统的抗干扰问题；分析了网络系统的实现方法。     

基于信息过程的绿色技术创新模式研究

从创新信息过程的角度对我国绿色技术创新模式进行实证案例研究，分析政府部门，科研院所以及相关企业在创新信息过程与网络中的作用，同时探讨企业内各部门在创新信息获取接受与加工学习中的特征，指出建立创新信息网络与有效进行创新信息过程管理是促进我国绿色技术创新的一个重要途径。     

IC卡在环境污染源信息管理中的应用

ＩＣ卡为环境保护系统提供了信息采集的新方法，简要介绍环境保护系统运用ＩＣ卡管理污染信息的试点工作。／     

基于ARCVIEW的矿区生态环境质量评价系统设计与实现

提出了应用地理信息系统ARCVIEW软件和空间信息管理和分析技术对矿区生态环境质量因子进行分析，结合Visual Basic编程软件和Visual foxpro数据库软件建立生态环境质量评价系统的方法，并在实验区实践应用，实现了生态环境质量评价信息数据输入、分析处理、结果输出等功能，使生态环境质量评价更具合理性和可操作性，评价结果形象、直观，为矿区环境管理、决策提供有利的依据、     

无人机遥感调查黄河源玛多县岩羊数量及分布

本研究于2017年利用无人机航拍调查对黄河源玛多县县域内的岩羊种群数量进行了估算,并对其分布规律进行了研究。无人机航拍共获取影像23784张,有效面积326.6 km~2,通过目视解译,获取样带内的岩羊种群数量为203只,种群密度为0.6215只/km~2。通过推算,得到玛多县岩羊种群数量为8968只。对玛多县岩羊分布位置与环境因子的分析结果显示:岩羊偏好于选择海拔为4100～4200 m、距公路大于3 km、距悬崖峭壁200 m以内的区域活动。本研究利用无人机航拍样带调查估算黄河源玛多县岩羊种群数量与密度,并结合ArcGIS软件对其生境进行分析,将3S技术与野生动物调查相结合,为青藏高原地区大型野生动物相关研究提供了新思路。     

实验室信息管理系统(LIMS)在环境监测系统的应用探讨

简要介绍了实验室信息管理系统(LIMS)的功用与发展基础,重点提出了环境监测部门引入LIMS所应关注的内容以及监测站LIMS系统应该实现的功能,展望了环境监测部门成功运用LIMS系统后为监测站行政、业务、质量、数据等等管理将带来的巨大变化.     

公路环境地理信息系统(HEGIS)研究与开发初探

在对公路环境地理信息系统 (HEGIS)进行系统需求分析的基础上 ,描述了利用地理信息系统 (GIS)建立HEGIS的可行性及其研究的主要内容、目的、意义及国内外发展趋势 ,初步探讨HEGIS在环境管理与决策等方面的应用功能研究及其开发技术路线。     

城市级环境信息系统总体方案的研究与开发

在分析我国城市级环境信息现状和需求的基础上,提出了我国城市级环境信息系统的总体方案，系统依靠现有的环境数据和管理软件建立城市环境信息基础数据库，依照数据仓库的组织方式对环境数据重新进行整合，并在此基础上开发出数据查询分析应用和地理信息系统，同时结合城市环保局的办公自动化系统，建立了一个统一的环境信息发布平台，提高了环境信息的共享水平。     

Effects of lindane on the photosynthetic apparatus of the cyanobacterium<Emphasis Type="Italic">anabaena</Emphasis>

INTENTION, GOAL, SCOPE, BACKGROUND: Cyanobacteria have the natural ability to degrade moderate amounts of organic pollutants. However, when pollutant concentration exceeds the level of tolerance, bleaching of the cells and death occur within 24 hours. Under stress conditions, cyanobacterial response includes the short-term adaptation of the photosynthetic apparatus to light quality, named state transitions. Moreover, prolonged stresses produce changes in the functional organization of phycobilisomes and in the core-complexes of both photosystems, which can result in large changes in the PS II fluorescence yield. The localization of ferredoxin-NADP+ reductase (FNR) at the ends of some peripheral rods of the cyanobacterial phycobilisomes, makes this protein a useful marker to check phycobilisome integrity. OBJECTIVE: The goal of this work is to improve the knowledge of the mechanism of action of a very potent pesticide, lindane (gamma-hexaclorociclohexane), in the cyanobacterium Anabaena sp., which can be considered a potential candidate for bioremediation of pesticides. We have studied the effect of lindane on the photosynthetic apparatus of Anabaena using fluorescence induction studies. As ferredoxin-NADP+ reductase plays a key role in the response to oxidative stress in several systems, changes in synthesis, degradation and activity of FNR were analyzed. Immunolocalization of this enzyme was used as a marker of phycobilisome integrity. The knowledge of the changes caused by lindane in the photosynthetic apparatus is essential for rational further design of genetically-modified cyanobacteria with improved biorremediation abilities. METHODS: Polyphasic chlorophyll a fluorescence rise measurements (OJIP) have been used to evaluate the vitality and stress adaptation of the nitrogen-fixing cyanobacterium Anabaena PCC 7119 in the presence of increasing concentrations of lindane. Effects of the pesticide on the ultrastructure have been investigated by electron microscopy, and FNR has been used as a marker of phycobilisome integrity. RESULTS AND DISCUSSION: Cultures of Anabaena sp. treated with moderate amounts of lindane showed a decrease in growth rate followed by a recovery after 72 hours of pesticide treatment. Concentrations of lindane below 5 ppm increased the photosynthetic performance and activity of the cells. Higher amounts of pesticide caused a decrease in these activities which seems to be due to a non-competitive inhibition of PS II. Active PS II units are converted into non-QA reducing, so called heat sink centers. Specific activity and amount of FNR in lindane-treated cells were similar to the values measured in control cultures. Release of FNR from the thylakoid after 48 hours of exposure to 5 ppm of lindane towards the cytoplasm was detected by immunogold labeling and electron microscopy. CONCLUSIONS: From these results, we conclude that the photosynthetic performance and activity of the cells are slightly increased in the presence of lindane up to 5 ppm. Moreover, in those conditions, lindane did not produce significant changes in the synthesis, degradation or activity of FNR. The high capability of Anabaena to tolerate lindane makes this cyanobacterium a good candidate for phytoremediation of polluted areas. RECOMMENDATION AND OUTLOOK: The results of this study show that cultures of Anabaena PCC 7119 tolerate lindane up to 5 ppm, without significant changes in the photosynthetic vitality index of the cells. However, a slight increase in phycobiliprotein synthesis is observed, which is related to total protein content. This change might be due to degradation of proteins less stable than phycobiliproteins. An identification of the proteins with altered expression pattern in the presence of the pesticide remains the subject of further work and will provide valuable information for the preparation of strains which are highly tolerant to lindane.