【摘 要】
：
Environmental pollution by heavy metals is a serious problem around the world.However,Traditional electrochemical devices are expensive,inaccurate,or cumbersome for practical applications.MFC based bi
【机 构】
：
Ministry of Education, Key Laboratory of Cell Activities and Stress Adaptations, School of Life Scie
【出 处】
：
第二十次全国环境微生物学学术研讨会
论文部分内容阅读
Environmental pollution by heavy metals is a serious problem around the world.However,Traditional electrochemical devices are expensive,inaccurate,or cumbersome for practical applications.MFC based biosensor has shown a potential as an effective and economical method for determining the quantity of hazardous metals.In this study,we designed an engineering ShewanellapiezotoleransWP3 and applied it in MFC based biosensor for specific copper detection.Bacteria have been demonstrated that can utilize negative regulator system to sense the variation of intracellular heavy metals concentration and control structure gene expression to maintain homeostasis.CopA promotor and its repressor expressing geneCueRwere selected and fused into PSW4 to regulate downstreamribB expression,which encoded for the riboflavin biosynthetic enzyme 3,4-dihydroxy-2-butanone-4-phosphatesynthase.Expressive discrepancy of riboflavin under control of divergent copper concentration,as an electron shutter,can be reflected into the voltage variation in MFC.
其他文献
黄药是目前应用最广的硫化矿捕收剂，黄药具有恶臭，可使水质发臭，导致水域中鱼虾减少，鱼体变形，鱼肉有异味且不宜烹调，并严重影响附近水域的生态平衡。会对周边生态环境产生一定的危害。松醇油起泡性强，能生成大小均匀、黏度中等和稳定性适合的气泡，纯度较低时是淡黄色到棕红色液体，比重小于水，有刺激性气味；松油醇在工业选矿废水中，由于其作为起泡剂的作用，会使得废水极易起泡，使水质恶化，对环境带来轻微影响本文主要
Gut microbime always have big impacts on health of wild animals,while habitat pollution and human activities could threaten their survival by switching intestinal microbiome.Here,we satellite-tracked
Soil provides a critical environment for microbial community development.However,microorganisms may be sensitive to substances such as heavy metals (HMs),which are common soil contaminants.The bacteri
微藻在水生生态系统的碳固定中发挥着重要作用，研究不同微藻对岩溶水体DIC的利用和转化过程，对弄清岩溶生态系统的碳汇潜力具有重要意义。本研究选取典型岩溶水体即桂林会仙岩溶湿地狮子潭作为研究地点，在其中放置自行设计的半开放式微藻培养箱培养土著微藻，分别设置了两种透明箱即原生培养箱和混合培养箱，以及黑色避光箱即黑箱，在一年的四个季节分别对上述实验装置水体中的温度、pH、电导率、叶绿素、碳酸酐酶(CA)活
In present study M39 a potential E2 degrader was isolated from deep sea water (depth 208 meter) from South China Sea.The both microbiological and molecular characterization of isolated strain revealed
厌氧膜生物反应器(AnMBR)是一种由厌氧生物处理单元与膜分离单元相结合的组合工艺,具有污泥持留量大、污染物去除性能优、出水水质稳定等特点.本文以AnMBR为研究平台,高COD浓度与色度的竹制品废水为处理对象,研究竹炭投加AnMBR工艺性能强化以及出水组成与膜菌群特性.结果 表明,投加竹炭颗粒的B-AnMBR反应器污染物去除性能显著提升,COD、氨氮去除率分别达94.5±2.9％、75.7±2.1
The marine bacterium strain Rhodococcus sp.P14 is known for its steroiddegrading.By analyzing its genome sequence,a novel short-chain dehydrogenase/reductase (SDR) gene was identified at the location
近年来，北京地区在秋冬春季节频繁遭受灰霾污染，对人们正常出行及公共卫生安全造成威胁。稳定的气象条件下，颗粒物浓度的激增是灰霾形成的重要原因。颗粒物来源广泛，包括工厂废气、汽车尾气等。同时，这些污染物的排放，不仅会增加大气颗粒物的浓度，还有可能增加大气重金属的浓度。生物气溶胶是重要的大气气溶胶，不仅含有过敏原、致病菌、病毒等对人类的健康存在潜在威胁，同时还含有生物冰核，对全球气候变化存在影响。空气微
Mineral resource is the important material basis of social development in China.Because of over-exploitation for long time,there are the problems of soil pollution and environment damage in mine area,
生物被膜是微生物在自然界中以群居的形式生存的一种生命状态。当外界营养贫乏时，微生物通过形成生物被膜增强自身的抗逆性。研究发现对于一些细菌，如枯草芽孢杆菌和大肠杆菌，培养基中碳源浓度越低，生物被膜形成越好，但碳源贫乏环境促使生物被膜形成的分子机制尚不清楚。