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Oxidation of diclofenac by birnessite: Identification of products and proposed transformation pathway

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Journal of Environmental Sciences 2020年第12期32卷 169-178页

作者： Yue Zhao Fei Liu Min Wang xiaopeng qin Institute of Quality Standards and Testing Technology for Agro-Products Key Laboratory of Agro-Product Quality and SafetyChinese Academy of Agricultural SciencesBeijing 100081China School of Water Resources and Environment and Beijing Key Laboratory of Water Resources and Environmental EngineeringChina University of Geosciences(Beijing)Beijing 100083China Department of Technology Assessment Technical Centre for SoilAgricultural and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China

Diclofenac(DCF), a widely used non-steroidal anti-inflammatory, reacted readily with birnessite under mild conditions, and the pseudo first order kinetic constants achieved 8.84 × 10^-2 hr^-1. Five products of DCF including an iminoquinone product(2,5-iminoquinone-diclofenac) and four dimer products were observed and identified by tandem mass spectrometry during the reaction. Meanwhile, 2,5-iminoquinone-diclofenac was identified to be the major product, accounting for 83.09% of the transformed DCF. According to the results of spectroscopic Mn(III) trapping experiments and X-ray Photoelectron Spectroscopy, Mn(IV) contained in birnessite solid was consumed and mainly converted into Mn(III) during reaction process, which proved that the removal of DCF by birnessite was through oxidation. Based on the identified products of DCF and the changes of Mn valence state in birnessite solid, a tentative transformation pathway of DCF was proposed.

关键词： Birnessite Diclofenac Oxidation mechanism Transformation pathway Emerging contaminants

巨桉纯林皆伐迹地营建混交林对林下灌草物种多样性的影响

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应用与环境生物学报 2024年第3期30卷 477-484页

作者：蒋璐张辟芳王军秦晓鹏汪海伦周世兴黄从德四川农业大学林学院成都611130 乐山市沙湾区自然资源局乐山614900 乐山市沙湾区国营林场乐山614900

林下植物多样性是反映森林群落结构和功能的重要指标.然而,混交林对林下灌草物种多样性的影响还存在不确定性.在四川省乐山市沙湾区巨桉纯林可持续经营改造示范区,选择巨桉(Eucalyptus grandis)人工纯林皆伐后营建的红叶碧桃(Prunus per... 详细信息

林下植物多样性是反映森林群落结构和功能的重要指标.然而,混交林对林下灌草物种多样性的影响还存在不确定性.在四川省乐山市沙湾区巨桉纯林可持续经营改造示范区,选择巨桉(Eucalyptus grandis)人工纯林皆伐后营建的红叶碧桃(Prunus persica‘Atropurpurea’)+西府海棠(Malus×micromalus)混交林、杉木(Cunninghamia lanceolata)+桢楠(Phoebezhennan)+红叶碧桃混交林和香樟(Cinnamomumcamphora)+水杉(Metasequoia glyptostroboides)混交林为对象,并以巨桉纯林为对照,研究相同种植年限的混交林对林下灌草多样性的影响.研究发现:与巨桉纯林相比,混交林林下植被物种数量明显增加,以杉木+桢楠+红叶碧桃混交林林下植物群落组成最为丰富;3种混交林灌木层的物种丰富度(R)、Simpson优势度指数(D)、Shannon-Wiener多样性指数(H)及Pielou均匀度指数(Jsw)均显著高于巨桉纯林,而草本层则无显著差异;在3种混交林中,灌木层和草本层植物多样性分别以香樟+水杉混交林和杉木+桢楠+红叶碧桃混交林最高;营建混交林在一定程度上提高了土壤pH值、含水量、全氮、全磷、全钾和有机质含量,降低了土壤容重和孔隙度;冗余分析(RDA)表明,土壤有机质含量是影响灌草层植物多样性的主要因素.综上可见,巨桉纯林转换成混交林后在初期提高了林下植物多样性,土壤有机质含量是影响混交林林下植物多样性的主要因子.

关键词：植物多样性混交林巨桉人工林土壤理化性质冗余度分析(RDA)

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生物炭材料特征及其在灰水处理中应用研究进展

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环境工程技术学报 2024年第1期14卷 268-277页

作者：戴畅何志琴李云王斌陈晓冬方菲秦晓鹏李志涛中国环境科学研究院生态环境部土壤与农业农村生态环境监管技术中心土壤中心嘉善双碳创新研究院临沂市园林环卫保障服务中心

生物炭具有比表面积大、孔隙度高、表面官能团丰富等优点,在灰水处理方面有较大的应用潜力。介绍了灰水的水质水量特点及常见处理技术,重点对生物炭的性质、改性方法以及生物炭基质在灰水处理方面的国内外应用研究进展进行了综述,并分... 详细信息

生物炭具有比表面积大、孔隙度高、表面官能团丰富等优点,在灰水处理方面有较大的应用潜力。介绍了灰水的水质水量特点及常见处理技术,重点对生物炭的性质、改性方法以及生物炭基质在灰水处理方面的国内外应用研究进展进行了综述,并分析了生物炭的再生性能。结果表明:目前应用于灰水处理的生物炭大多是木质源生物炭,木质源生物炭pH处于碱性范围,具有大比表面积、高孔隙度等优点,其比表面积和孔隙度大多数在0~520 m^(2)/g和48%~83%;众多改性方法中,金属盐生物炭改性的研究较多,采用该方法改性后提高了生物炭的吸附能力,并使其磁化从而方便后期的分离回收;生物炭基质多应用于人工湿地、绿墙等生态处理系统进行灰水处理,在最优运行条件下对灰水中有机物、营养物质的去除率均能达到90%,具有良好的应用前景。最后对生物炭在灰水处理应用中存在的问题进行了总结,并从加强新污染物去除、生物炭再生及节能减耗3个方面对未来研究进行了展望。

关键词：灰水处理基质生物炭改性再生

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水压光面爆破在济莱高铁寨山隧道中的应用

中国高新科技 2024年第4期 73-75页

作者：秦晓鹏梁英智赵松壮王树栋济南轨道交通集团有限公司山东济南250000 济南交通发展投资有限公司山东济南250000

水压光面爆破是近几年在隧道爆破施工中应用的技术,该技术在济莱高铁寨山隧道开挖过程中进行了广泛应用。通过对比普通光面爆破与水压光面爆破的技术指标与经济效益,该技术可提高整个隧道爆破施工中的效率,对隧道的超欠挖实现了有效控制... 详细信息

水压光面爆破是近几年在隧道爆破施工中应用的技术,该技术在济莱高铁寨山隧道开挖过程中进行了广泛应用。通过对比普通光面爆破与水压光面爆破的技术指标与经济效益,该技术可提高整个隧道爆破施工中的效率,对隧道的超欠挖实现了有效控制,节省了施工成本,提高了施工效率,最大限度地降低了爆破粉尘和噪声的产生,改善了工人作业的环境,对周边环境的影响降到了最低,确保了施工进度,实现了更高的经济效益。

关键词：水压光面爆破隧道超欠挖环境影响经济效益

Hemagglutinin stem reactive antibody response in individuals immunized with a seasonal influenza trivalent vaccine

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Protein & Cell 2015年第6期6卷 453-457页

作者： xiaopeng Zhao Kun qin Jinlei Guo Donghong Wang Zi Li Wenfei Zhu Liqi Liu Dayan Wang Yuelong Shu Jianfang Zhou National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and Prevention Key Laboratory for Medical Virology National Health and Family Planning Commission Beijing 102206 China

Dear Editor, Influenza is a contagious, acute respiratory disease caused by influenza viruses. Type A influenza virus has a broad host range and has caused substantial human morbidity and mortality. There are sixteen subtypes of influenza A virus so far, which are divided into two distinct groups： group 1 （H1, H2, H5, H6, H8, H9, Hll, H12, H13 and H16） and group 2 （H3, H4, H7, H10, H14 and H15）（Corti et al., 2011）. Seasonal H1 and H3 subtype influenza viruses are circulating in the human population.

关键词： Influenza Influenza Vaccination Neutralize Activity Geometric Mean Titer Influenza Trivalent Vaccine

Chemical Synthesis of a Key Precursor Relevant to the Tetrasaccharide Repeating Unit from Treponema medium ATCC 700293

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Chinese Journal of Chemistry 2024年第14期42卷 1615-1622页

作者： Wenbin Sun Guangzong Tian Meiru Ding Chunjun qin xiaopeng Zou Jing Hu Jian Yin Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of EducationSchool of Biotechnology&School of Life Sciences and Health EngineeringJiangnan UniversityLihu Avenue 1800WuxiJiangsu214122 China Wuxi School of Medicine Jiangnan UniversityLihu Avenue 1800WuxiJiangsu214122 China

Treponema is a Gram-negative anaerobic bacterium,among which the pathogenic Treponema can cause various diseases,such as venereal syphilis(Treponema pallidum),yaws(Treponema carateum),and oral diseases(Treponema denticola and Treponema medium).Although different from conventional lipopolysaccharides,the extracellular glycoconjugate of Treponema may still be a potential antigen and provide a candidate for vaccine ***,we completed the first chemical synthesis of Treponema medium ATCC 700293 tetrasaccharide precursor containing L-ornithine(L-Orn)and D-aspartic acid(D-Asp)*** efficiency of non-reducing end disaccharide formation has been improved by optimizing the assembly of the protecting groups in the donors and ***[3+1]glycosylation strategy attempted to reduce the length of the acceptor to increase the nucleophilicity of the hydroxyl group,thereby improving the efficiency of synthesizing the target *** L-Orn derivative was introduced at the final stage due to its influence on the glycosylation stereospecificity and ***,the successful introduction of two amino acid derivatives and the synthesis of a tetrasaccharide precursor with complex functional-group modifications have provided valuable insights for synthesizing other complex bacterial glycans.

关键词： Glycosylation Total synthesis Treponema medium ATCC 700293 Tetrasaccharide precursor Protecting group Oligosaccharides Regioselectivity Neighboring-group effects

Immunological Exploration of Helicobacter pylori Serotype O_(2) O-Antigen by Using a Synthetic Glycan Library

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Chinese Journal of Chemistry 2024年第3期42卷 243-251页

作者： Ming Zhao Guangzong Tian Chunjun qin xiaopeng Zou Peter H. Seeberger Jing Hu Jian Yin Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of EducationSchool of Biotechnology & School of Life Sciences and Health EngineeringJiangnan UniversityLihu Avenue 1800WuxiJiangsu214122 China Biomolecular Systems Department Max Planck Institute of Colloids and InterfacesAm Mühlenberg 1Potsdam14476 Germany Wuxi School of Medicine Jiangnan UniversityLihu Avenue 1800WuxiJiangsu214122 China

Helicobacter pylori(***)infection is a threat to human *** lipopolysaccharide(LPS)O-antigen holds promise for developing *** is meaningful to explore the immunological activity of oligosaccharides with different lengths and frameshifts for antigen ***,a glycan library of *** O2 O-antigen containing eight fragments is *** screening with *** O2 LPS sera and patients’sera by glycan microarray,the disaccharide HPO2G-2b and trisaccharide HPO2G-3a show strong antigenicity and then are separately conjugated with carrier protein *** glycoconjugates elicit a robust immunoglobulin G(IgG)immune response in *** anti-HPO2G-3a IgG antibodies possess a much stronger binding affinity with the LPS and bacteria of *** O2 than the anti-HPO2G-2b IgG *** is no cross-reaction between both sera IgG antibodies with LPS and bacteria of *** O1,O6,and *** results demonstrate the trisaccharide HPO2G-3a is a promising candidate for *** vaccine development.

关键词： Glycoconjugates Helicobacter pylori Immunology Microarrays O-antigen Oligosaccharides

Secure Measuring and Controlling Methods Embedded SM4 Algorithm for Smart Home

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Secure Measuring and Controlling Methods Embedded SM4 Algori...

Constraints on the primordial curvature power spectrum by pulsar timing array data:a polynomial parameterization approach

2015年中国智能自动化学术会议

作者： Xiangdong Hu xiaopeng qin Haiming Mou College of Automation Chongqing University of Posts and Telecommunications

Smart home based on the Internet of things is gradually changing our daily life, while it faces such serious problems as secure measuring and controlling to appliances and protection of end user’s privacy. To guarantee the safety and reliability of smart home system, a secure measuring and controlling method embedded the domestic SM4 cryptographic algorithm for smart home is proposed in this paper, which integrates such secure mechanisms as access control based on the physical addresses of smartphone terminal or sensor nodes used in measuring and controlling operations, authentication based on the keys used in the encrypted transmission of instructions of measuring, and controlling and abnormal detection based on analysis of data. On such basis, the comparison in performances is carried out by secure measuring and controlling methods embedded domestic SM4 algorithm or typical AES one. The results of test suggest that the proposed secure measuring and controlling methods for smart home is feasible and effective, and the delay time consumed in information processing of the proposed method is only2.5 % more than the currently pervading ones without secure mechanism. The rate of delay based on the SM4 algorithm is about 4 % less on average than the original AES one embedded in nodes, and SM4 algorithm owns independent intellectual property right with more flexible in realization of system.

关键词： Internet of things Smart home Safety SM4 algorithm Measuring and controlling

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Communications in Theoretical Physics 2024年第1期76卷 96-104页

作者： qin Fei School of Mathematics and Physics Hubei Polytechnic UniversityHuangshi 435003China

The recent stochastic signal observed jointly by NANOGrav,parkes pulsar timing array,European pulsar timing array,and Chinese pulsar timing array can be accounted for by scalarinduced gravitational waves(SIGWs).The source of the SIGWs is from the primordial curvature perturbations,and the main contribution to the SIGWs is from the peak of the primordial curvature power *** effectively model this peak,we apply the Taylor expansion to parameterize *** the Taylor expansion parameterization,we apply Bayesian methods to constrain the primordial curvature power spectrum based on the NANOGrav 15 year data *** constraint on the primordial curvature power spectrum possesses a degree of generality,as the Taylor expansion can effectively approximate a wide range of function profiles.

关键词： pulsar timing array scalar-induced gravitational waves inflation