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厌氧环境下黏土矿物结构Fe(Ⅲ)还原对Cd(Ⅱ)固持特性的影响

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农业环境科学学报 2024年第5期43卷 1045-1055页

作者：范小妹董易坤吴聪王帅廖文娟周卫军崔浩杰湖南农业大学资源学院长沙410128

黏土矿物结构Fe(Ⅲ)是土壤铁元素主要赋存形态之一,稻田淹水环境下矿物结构Fe(Ⅲ)易发生还原反应,改变矿物晶体微结构和表面化学性质,为研究这种变化对矿物固持Cd(Ⅱ)特性的影响,以合成含铁黏土矿物绿脱石为研究对象,通过化学还原,探讨... 详细信息

黏土矿物结构Fe(Ⅲ)是土壤铁元素主要赋存形态之一,稻田淹水环境下矿物结构Fe(Ⅲ)易发生还原反应,改变矿物晶体微结构和表面化学性质,为研究这种变化对矿物固持Cd(Ⅱ)特性的影响,以合成含铁黏土矿物绿脱石为研究对象,通过化学还原,探讨了厌氧条件下绿脱石结构态Fe(Ⅲ)还原对Cd(Ⅱ)吸附性能的影响及作用机制。结果表明:合成绿脱石中总铁含量为31.3%,结构态Fe(Ⅱ)和Fe(Ⅲ)的含量占总铁的98.6%。还原处理后,矿物结构中Fe(Ⅱ)含量由还原前的3.9%显著提高至67.4%。XRD、SEM、BET和XPS分析表明,还原后绿脱石矿物层间距增大,分散程度更高,比表面积由151.6 m^(2)·g^(-1)增加至184.0 m^(2)·g^(-1),矿物表面的羟基基团数量增加。结构Fe(Ⅲ)还原降低了矿物对Cd(Ⅱ)的吸附和固持性能,Langmuir模型拟合还原后矿物对Cd(Ⅱ)的最大吸附量为23.5 mg·g-1,明显低于还原前矿物对Cd(Ⅱ)的吸附量(33.4 mg·g-1)。还原前后矿物对Cd(Ⅱ)的吸附性能均随着离子强度增大而降低,但还原矿物吸附Cd(Ⅱ)的降幅明显低于未还原矿物。黏土矿物结构Fe(Ⅲ)还原后吸附Cd(Ⅱ)的性能降低主要是由于还原过程中结构Fe(Ⅱ)迁移进入层间,抑制了吸附过程中Cd(Ⅱ)进入矿物层间。研究表明,厌氧环境中黏土矿物结构Fe(Ⅲ)显著降低了矿物对Cd(Ⅱ)的固持特性。

关键词：黏土矿物结构态铁还原镉吸附

Global Research Trends Related to CO_2 Emissions and Their Enlightenment to China

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Chinese Journal of Population,Resources and Environment 2012年第1期10卷 3-12页

作者： Liu Hongguang Liu Weidong fan xiaomei Tang Zhipeng Key Laboratory of Regional Sustainable Development Modeling CAS Beijing 100101 China Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China Nanjing University of Information Science ＆ Technology Nanjing Jiangsu 210044 China

Given the growing awareness of the likely catastrophic impacts of climate change and close association of climate change with global emissions of greenhouse gases （of which carbon dioxide is more prominent） , considerable research efforts have been devoted to the analysis of carbon dioxide （CO2） emissions and its relationship to sustainable development. Now GHG reduction programs have been coming into effect in many developed coun- tries that have more responsibility for historical CO2 emissions, and the studies have become mature. First, the GHG emissions accounting system is more all-inclusive and the methods are more rational with the effort of IPCC from 1995 and all other research- ers related. Second, the responsibility allocation is more rational and fair. Along with the clarity of ＂carbon transfer＂ and ＂carbon leakage＂, the perspective and methodology for allocating regional COz emissions responsibility is turning from production base to consumption base. Third, the decomposition method has become more mature and more complex. For example, the decomposition formulas are including KAYA expression and input-output expres- sion and the decomposition techniques are developed from index analysis to simple average divisia and then adaptive-weighting divisia. Fourth, projection models have become more integrated and long-term. The top-down model and bottom-up model are both inter-embedded and synergetic. Trends above give some advice for the research on CO2 in China, such as emissions factors database construction, deeper-going research on emissions responsibility and structure analysis, promotion of modeling technology and technology-environment database.

关键词： CO2 emissions research trends enlightenment

A thermo-responsive rewritable plasmonic bio-memory by regulating single core-satellite gold nanocluster dissociation

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Nano Research 2024年第8期17卷 7275-7282页

作者： Wen Zhang Yi Wang Yamin Wang xiaomei Lu Weibing Wu Quli fan Lei Zhang State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing 210023China Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources College of Light Industry and Food EngineeringNanjing Forestry UniversityNanjing 210037China Zhengzhou Institute of Biomedical Engineering and Technology Zhengzhou 450001China Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)&School of Flexible Electronics(Future Technologies)Nanjing Tech University(Nanjing Tech)Nanjing 211816China

A thermo-responsive rewritable plasmonic bio-memory chip has been successfully fabricated on an indium tin oxide(ITO)glass slide by assembling core-satellite gold nanoclusters with different size of gold nanoparticles(AuNPs)using double-strand DNA(dsDNA)*** the prepared 70@DNA20@13 gold nanoclusters(AuNCs)exhibited more stable and greater photothermal conversion *** short time irradiation by 633 nm microbeam laser,every individual AuNCs could be excited and remove the satellite AuNPs on its ***,in the dissociation process of AuNCs with 3−5 satellite,its color would change from yellow to green,which showed more significant reduction in the red channel of the dark-field microscopy(DFM)images and could be defined to state“0”and“1”***,this plasmonic nano bio-memory could transform cyclically its state between 0 and 1 which exhibited excellent rewritable ability.

关键词： plasmonic assembly thermal-responsive single nanoparticle rewritable bio-memory

Schisandra sphenanthera extract(Wuzhi Tablet)protects against chronic-binge and acute alcohol-induced liver injury by regulating the NRF2-ARE pathway in mice

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Acta Pharmaceutica Sinica B 2017年第5期7卷 583-592页

作者： Xuezhen Zeng Xi Li Chenshu Xu Fulin Jiang Yufei Mo xiaomei fan Yaoting Li Yiming Jiang Dongshun Li Min Huang Huichang Bi School of Pharmaceutical Sciences Sun Yat-sen University Department of Pharmacy School of Medicine Shenzhen University Shenzhen Bao'an Maternal and Child Health Hospital

Alcohol abuse leads to alcoholic liver disease and no effective therapy is currently *** Tablet(WZ), a preparation of extract from Schisandra sphenanthera that is a traditional hepatoprotective herb, exerted a significant protective effect against acetaminophen-induced liver injury in our recent studies, but whether WZ can alleviate alcohol-induced toxicity remains unclear. This study aimed to investigate the contribution of WZ to alcohol-induced liver injury by using chronic-binge and acute models of alcohol feeding. The activities of ALT and AST in serum were assessed as well as the level of GSH and the activity of SOD in the liver. The expression of CYP2E1 and proteins in the NRF2-ARE signaling pathway including NRF2, GCLC, GCLM, HO-1 were measured, and the effect of WZ on NRF2 transcriptional activity was determined. We found that both models resulted in liver steatosis accompanied by increased transaminase activities, but that liver injury was significantly attenuated by WZ. WZ administration also inhibited CYP2E1 expression induced by alcohol, and elevated the level of GSH and the activity of SOD in the liver. Moreover, the NRF2-ARE signaling pathway was activated by WZ andthe target genes were all upregulated. Furthermore, WZ significantly activated NRF2 transcriptional activity. Collectively, our study demonstrates that WZ protected against alcohol-induced liver injury by reducing oxidative stress and improving antioxidant defense, possibly by activating the NRF2-ARE pathway.

关键词： Alcoholic liver injury Schisandra sphenanthera Wuzhi Tablet NRF2-ARE Oxidative stress

Caring for Those In Special Need

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Women of China 1998年第5期 48-49页

作者： HUANG xiaomei fan YI

Millions of men and women in the world are living in a miserable abyss. They can hear sounds that others don’t, see images that others cannot, and their minds are filled with eccentric ideas. Even as they smile, misery is gnawing at the heart; they may sit quietly, but it feels like hundreds of horses are stampeding inside their brains. They are overwhelmed by worry and fear. In this way, the serious person becomes silly, the energetic goes dull, the cheerful turns gloomy and the honest may cheat *** other words, they have been plunged into uncontrollable fantasies that take them far away from reality. They are the mentally ill, and they are deeply unfortunate." Professor Xia Zhenyi, a well-known Chinese psychiatrist, offered this sympathetic view of his patients. He reminds us: "Mental patients are human beings too.

关键词： In Ni Caring for Those In Special Need

SIRT6 as a key event linking P53 and NRF2 counteracts APAP-induced hepatotoxicity through inhibiting oxidative stress and promoting hepatocyte proliferation

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Acta Pharmaceutica Sinica B 2021年第1期11卷 89-99页

作者： Yanying Zhou xiaomei fan Tingying Jiao Wenzhou Li Panpan Chen Yiming Jiang Jiahong Sun Yixin Chen Pan Chen Lihuan Guan Yajie Wen Min Huang Huichang Bi School of Pharmaceutical Sciences Sun Yat-sen UniversityGuangzhou 510006China Shenzhen Baoan Women’s and Children’s Hospital Jinan UniversityShenzhen 518102China Department of Pharmacy the First Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510080China

Acetaminophen(APAP)overdose is the leading cause of drug-induced liver injury,and its prognosis depends on the balance between hepatocyte death and *** 6(SIRT6)has been reported to protect against oxidative stress-associated DNA *** whether SIRT6 regulates APAPinduced hepatotoxicity remains *** this study,the protein expression of nuclear and total SIRT6 was up-regulated in mice liver at 6 and 48 h following APAP treatment,***6 knockdown in AML12 cells aggravated APAP-induced hepatocyte death and oxidative stress,inhibited cell viability and proliferation,and downregulated CCNA1,CCND1 and CKD4 protein ***6 knockdown signifi-cantly prevented APAP-induced NRF2 activation,reduced the transcriptional activities of GSTm andNQO1 and the m RNA levels of Nrf2,Ho-1,Gsta and ***,SIRT6 showed potential protein interaction with NRF2 as evidenced by co-immunoprecipitation(Co-IP)***,the protective effect of P53 against APAP-induced hepatocytes injury was *** Sirt6 m RNA was significantly down-regulated in P53à/àmice.P53 activated the transcriptional activity of SIRT6 and exerted interaction with *** results demonstrate that SIRT6 protects against APAP hepatotoxicity through alleviating oxidative stress and promoting hepatocyte proliferation,and provide new insights in the function of SIRT6 as a crucial docking molecule linking P53 and NRF2.

关键词： Acetaminophen Hepatotoxicity SIRT6 NRF2 P53

碳源种类对双泥生物膜亚硝化反硝化除磷脱氮工艺的影响

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沈阳建筑大学学报（自然科学版） 2016年第4期32卷 718-725页

作者：樊晓梅东北大学建筑设计院有限公司辽宁沈阳110004

目的研究碳源种类对双泥生物膜亚硝化反硝化除磷工艺脱氮除磷的影响程度.方法以甲醇、淀粉、葡萄糖、乙酸钠、丙酸钠、污泥水解酸化液六种碳源模拟废水,通过间歇运行方式对不同碳源的反硝化除磷系统的运行状态进行研究.结果六个系统中,... 详细信息

目的研究碳源种类对双泥生物膜亚硝化反硝化除磷工艺脱氮除磷的影响程度.方法以甲醇、淀粉、葡萄糖、乙酸钠、丙酸钠、污泥水解酸化液六种碳源模拟废水,通过间歇运行方式对不同碳源的反硝化除磷系统的运行状态进行研究.结果六个系统中,淀粉的COD去除率最小,为45%,其余系统相差不大,去除率最大的是污泥水解酸化液,为88%;缺氧结束时系统出水PO_4^(3-)-P质量浓度分别为2.24 mg/L、3.00 mg/L、3.81 mg/L、1.40 mg/L、2.46 mg/L、1.18 mg/L;各系统每克M LSS的亚反硝化速率分别为1.27 mg/(g·h)、1.15 mg/(g·h)、1.58 mg/(g·h)、2.91 mg/(g·h)、2.60 mg/(g·h)、2.03 mg/(g·h).结论碳源种类对双泥生物膜亚硝化反硝化除磷系统有很大影响,淀粉类大分子碳源不利于反硝化除磷,乙酸钠类小分子物质有利于磷的释放和吸收.

关键词：亚硝化反硝化除磷亚硝化反硝化聚磷菌碳源种类双泥生物膜

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反硝化聚磷菌吸磷能力和生长特性研究

沈阳建筑大学学报（自然科学版） 2017年第1期33卷 119-126页

作者：樊晓梅东北大学建筑设计院有限公司辽宁沈阳110004

目的研究反硝化聚磷菌在同一反应条件下的吸磷能力和生长特性,为污水脱氮除磷微生物学的研究提供理论依据.方法通过反硝化聚磷菌的吸磷试验,确定各菌株的含磷量及吸磷速率;通过拮抗试验构建复合菌群,采用浊度法绘制各菌群的生长曲线,进... 详细信息

目的研究反硝化聚磷菌在同一反应条件下的吸磷能力和生长特性,为污水脱氮除磷微生物学的研究提供理论依据.方法通过反硝化聚磷菌的吸磷试验,确定各菌株的含磷量及吸磷速率;通过拮抗试验构建复合菌群,采用浊度法绘制各菌群的生长曲线,进一步研究微生物的种群特性及对环境的适应能力.结果韦荣氏菌属在缺氧培养3 h时,磷质量浓度出现最大降幅,出水PO3-4-P质量浓度均低于2.00 mg/L.菌株F8适应新环境的能力最强.对数期时,菌株F3、F9、F13的生长速率最小.菌株F5的稳定期持续时间比较短,处于144~168 h;F11持续时间最长,处于144~216 h.菌株F16对数期最短,最先进入稳定期,且稳定期持续时间最长.各种复配菌株处于稳定期时菌体数量从小到大依次为F9、F8、F3、F10、F7、F2、F4、F14、F16、F6、F11、F1、F5、F12、F13、F15.结论反硝化聚磷菌单菌吸磷速率与其菌株整体吸磷量大小无关,复合菌株较强的适应能力使其调整期比任何一株单菌的时间都短.

关键词：反硝化聚磷菌吸磷能力生长曲线单菌吸磷速率

岩体破坏过程数值模拟中网格单元力学参数赋值的研究

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岩石力学与工程学报 2002年第A02期21卷 2496-2500页

作者：胡小荣樊晓梅俞茂宏西安交通大学建筑工程与力学学院西安710049 本溪冶金高等专科学校资建系本溪117022

基于非均质岩体力学参数具有空间变异二重性,应看成是空间随机场这一观点,将地质统计学中有关随机场的空间变异性分析和估值原理与随机场的离散相结合,对岩体破坏过程数值模拟中网格单元力学参数的估值做了探讨,并进行了实例计算模拟。... 详细信息

基于非均质岩体力学参数具有空间变异二重性,应看成是空间随机场这一观点,将地质统计学中有关随机场的空间变异性分析和估值原理与随机场的离散相结合,对岩体破坏过程数值模拟中网格单元力学参数的估值做了探讨,并进行了实例计算模拟。该方法作为一种空间随机场方法,与现有的统计分布加随机赋值法相比,可克服后者只注重随机性而忽视结构性的缺点,从而能使赋值更真实地再现非均质岩体力学参数所具有的空间变异二重性特征。

关键词：数值分析数值模拟网格单元力学参数赋值随机场地质统计学