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Decrease of NH_4^+-N by bacterioplankton accelerated the removal of cyanobacterial blooms in aerated aquatic ecosystem

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Journal of Environmental Sciences 2013年第11期25卷 2223-2228页

作者： Xi Yang Ping Xie zhimei ma Qing Wang Huihui Fan Hong Shen Donghu Experimental Station of Lake Ecosystems State Key Laboratory of Freshwater Ecology and Biotechnology of China Institute of Hydrobiology Chinese Academy of Sciences Wuhan Fisheries Science Research Institute The University of Chinese Academy of Sciences

We used aerated systems to assess the influence of the bacterioplankton community on cyanobacterial blooms in algae/post-bloom of Lake Taihu, China. Bacterioplankton community diversity was evaluated by polymerase chain reaction-denaturing gradient gel electrophoresis （PCR-DGGE） fingerprinting. Chemical analysis and nitrogen dynamic changes illustrated that NH4＋-N was nitrified to NO2^--N and NO3^--N by bacterioplankton. Finally, NHa^＋-N was exhausted and NO3^--N was denitrified to NO2^--N, while the accumulation of NO2^--N indicated that bacterioplankton with completely aerobic denitrification ability were lacking in the water samples collected from Lake Taihu. We suggested that adding completely aerobic denitrification bacteria （to denitrify NO2^--N to N2） would improve the water quality. PCR-DGGE and sequencing results showed that more than 1/3 of the bacterial species were associated with the removal of nitrogen, and Acidovorax temperans was the dominant one. PCR-DGGE, variation of nitrogen, removal efficiencies of chlorophyll-a and canonical correspondence analysis indicated that the bacterioplankton significantly influenced the physiological and biochemical changes of cyanobacteria. Additionally, the unweighted pair-group method with arithmetic means revealed there was no obvious harm to the microecosystem from aeration. The present study demonstrated that bacterioplankton can play crucial roles in aerated ecosystems, which could control the impact of cyanobacterial blooms in eutrophicated fresh water systems.

关键词： cyanobacterial blooms PCR-DGGE bacterioplankton community aerated ecosystem

Microcystis aeruginosa/Pseudomonas pseudoalcaligenes interaction effects on off-flavors in algae/bacteria co-culture system under different temperatures

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Journal of Environmental Sciences 2015年第5期27卷 38-43页

作者： Xi Yang Ping Xie Yunzhen Yu Hong Shen Xuwei Deng zhimei ma Peili Wang Min Tao Yuan Niu Donghu Experimental Station of Lake Ecosystems State Key Laboratory of Freshwater Ecology and Biotechnology of ChinaInstitute of Hydrobiology Chinese Academy of Sciences Wuhan Fisheries Science Research Institute The University of Chinese Academy of Sciences

We conducted an experiment to study the interaction effects of Microcystis aeruginosa and Pseudomonas pseudoalcaligenes on off-flavors in an algae/bacteria co-culture system at three temperatures（24, 28 and 32℃）. Gas chromatography-mass spectrometry was applied to measure off-flavor compounds dimethyl sulfide（DMS）, dimethyl trisulfide（DMTS）,2-methylisoborneol, geosmin（GEO） and β-cyclocitral. During the lag phase of co-cultured M. aeruginosa（first 15 days）, P. pseudoalcaligenes significantly increased the production of DMS, DMTS and β-cyclocitral at all three temperatures. In the exponential phase of co-cultured M. aeruginosa（after 15 days）, M. aeruginosa became the main factor on off-flavors in the co-culture system, and β-cyclocitral turned to the highest off-flavor compound. These results also indicated that DMS, DMTS and β-cyclocitral were the main off-flavor compounds in our M. aeruginosa/P. pseudoalcaligenes co-culture system. Univariate analysis was applied to investigate the effects of M. aeruginosa and P. pseudoalcaligenes on the production of off-flavors. The results demonstrated that both M. aeruginosa and P. pseudoalcaligenes could increase the production of DMS and DMTS, while β-cyclocitral was mainly determined by M. aeruginosa. Our results also provide some insights into understanding the relationship between cyanobacteria and heterotrophic bacteria.

关键词： Co-culture system Microcystis aeruginosa Off-flavors Pseudomonas pseudoalcaligenes

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孔子仁爱思想的两重性及其当代价值探析

潍坊教育学院学报 2010年第2期23卷 20-21,44页

作者：马志美安徽大学哲学系安徽合肥230039

"仁爱"是孔子思想体系中的核心概念。作为一种社会伦理道德,孔子的"仁爱"思想一方面带有时代和政治上的局限性,另一方面它表现出了对人的关爱,充满了人道主义精神。这一思想对当下构建社会主义和谐社会具有重要的理论指导意义。

关键词：孔子仁爱两重性价值

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超声波阻垢与除垢技术研究进展

石化技术 2008年第3期15卷 62-65页

作者：马志梅中国石油化工股份有限公司北京燕山分公司化学品事业部北京102500

介绍了超声波阻垢与除垢的机理和国内外在超声波阻垢与除垢方面的应用进展情况。与传统阻垢与除垢方法相比,超声波阻垢与除垢技术具有操作连续、控制稳定、无环境污染等特点,是一种值得推广的新方法。

关键词：超声波阻垢除垢

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超声波阻垢与除垢技术研究进展

中外能源 2008年第4期13卷 92-96页

作者：马志梅中国石化北京燕山分公司化学品事业部北京102500

介绍了超声波工作原理及超声波阻垢与除垢的机理,并以换热系统、采油系统、锅炉系统、蒸发系统及燕化公司化学品事业部的化工系统为例,介绍了国内外在超声波阻垢与除垢方面的应用进展情况。超声波阻垢与除垢技术实现了阻垢与除垢的连续... 详细信息

介绍了超声波工作原理及超声波阻垢与除垢的机理,并以换热系统、采油系统、锅炉系统、蒸发系统及燕化公司化学品事业部的化工系统为例,介绍了国内外在超声波阻垢与除垢方面的应用进展情况。超声波阻垢与除垢技术实现了阻垢与除垢的连续在线操作,与传统阻垢与除垢方法相比,超声波阻垢与除垢技术具有自动化程度高、工作性能可靠、不需要化学试剂、对环境无污染等特点,是一种值得推广的新方法。

关键词：超声波阻垢除垢机理应用

气相色谱法同时测定生活饮用水中五种菊酯类农药残留量

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福建分析测试 2007年第3期16卷 61-64页

作者：马志梅福建省泉南供水有限公司福建泉州362000

以正己烷为萃取剂,采用毛细管气相色谱法同时测定生活饮用水及水源水中甲氰菊酯、氯氰菊酯、氰戊菊酯、溴氰菊酯和联苯菊酯五种拟除虫菊酯类农药残留量。测定结果的相对标准偏差为1.4%～2.0%。回收率为81.5%～93.0%。通过实样分析验证... 详细信息

以正己烷为萃取剂,采用毛细管气相色谱法同时测定生活饮用水及水源水中甲氰菊酯、氯氰菊酯、氰戊菊酯、溴氰菊酯和联苯菊酯五种拟除虫菊酯类农药残留量。测定结果的相对标准偏差为1.4%～2.0%。回收率为81.5%～93.0%。通过实样分析验证了方法的适用性。

关键词：毛细管气相色谱拟除虫菊酯类残留量

木薯及其副产品的营养价值及在动物生产中的应用

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中国畜牧兽医 2018年第8期45卷 2135-2146页

作者：崔艺燕田志梅李贞明马现永广东省农业科学院动物科学研究所畜禽育种国家重点实验室农业部华南动物营养与饲料重点实验室广东省畜禽育种与营养研究重点实验室广东省动物育种与营养公共实验室广州510640

木薯耐干旱、耐贫瘠且易管理,其茎叶、块根及工业副产物营养物质含量较高,是一种优质的非常规饲料。木薯叶粗蛋白质、粗脂肪、灰分含量较高,含有丰富的钙、铁、锌、锰。木薯块根是很好的能量来源,其粗蛋白质、粗脂肪、矿物质、维生素含... 详细信息

木薯耐干旱、耐贫瘠且易管理,其茎叶、块根及工业副产物营养物质含量较高,是一种优质的非常规饲料。木薯叶粗蛋白质、粗脂肪、灰分含量较高,含有丰富的钙、铁、锌、锰。木薯块根是很好的能量来源,其粗蛋白质、粗脂肪、矿物质、维生素含量低于木薯叶。木薯渣主要由木薯的外皮、破碎细胞壁等组成,粗蛋白质含量很低,粗纤维、中性洗涤纤维、酸性洗涤纤维含量较高,矿物质、氨基酸丰富,但钙、磷、氨基酸不平衡。木薯品种、生长条件、收割方式、收获时间、加工工艺等均会影响木薯及其副产品营养物质的含量。木薯中含有氰化物、单宁及植酸等抗营养因子,其中氰化物是限制木薯应用的最主要因素,其可结合细胞色素C氧化酶,阻断线粒体电子传递链,抑制有氧呼吸,导致中枢神经系统抑制和死亡。单宁、植酸与蛋白质结合生成络合物,阻碍营养物质的消化吸收,可通过水煮、烘烤、干燥等物理化学方法,以及发酵、育种等手段对木薯进行脱毒。研究表明,木薯及其副产品可广泛应用于动物生产中,对动物生长性能、肉品质无不良影响。开发与利用非常规饲料有利于缓解饲料资源紧张,降低养殖成本。作者详细介绍了木薯及其副产品的营养价值、抗营养因子及其脱毒方法以及其在动物生产上的应用,以期为木薯在畜禽养殖中的综合利用提供一定的参考。

关键词：木薯木薯叶木薯渣氰化物

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食品安全快速检测技术的应用和进展

食品安全导刊 2022年第17期 173-175页

作者：马志梅高春平石家庄大为生物技术有限公司河北石家庄050035

食品安全快速检测技术操作简单、能够快速检测得出检测结果,适合基层场景使用,因此得到迅速发展。本文对食品安全快速检测技术进行了概述和简单评价。

关键词：食品安全快速检测农药残留

Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai Li Zhen ma Jin-Hua Gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity