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Persistent free radicals in humin under redox conditions and their impact in transforming polycyclic aromatic hydrocarbons

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Frontiers of Environmental Science & Engineering 2020年第4期14卷 213-223页

作者： Hanzhong Jia Yafang Shi Xiaofeng Nie Song Zhao tiecheng wang Virender K.Sharma College of Resources and Environment Northwest A&F UniversityYangling 712100China State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau Institute of Soil and Water ConservationNorthwest A&F UniversityYangling 712100China Program for the Environment and Sustainability Department of Occupational and Environmental HealthSchool of Public HealthTexas A&M UniversityCollege StationTX 77843USA

The role of humic substance-associated persistent free radicals(PFRs)in the fate of organic contaminants under various redox conditions remains *** study examined the characterization of original metal-free peat humin(HM),and HM treated with varying concentrations of H2O2 and L-ascorbic acid(VC)(assigned as H2O2-HM and VC-HM).The concentration of PFRs in HM increased with the addition of VC/H2O2 at concentrations less than 0.08 mol/*** evolution of PFRs in HM under different environmental conditions(e.g.,oxic/anoxic and humidity)was *** types of PFRs were detected in HM:a relatively stable radical existed in the original sample,and the other type,which was generated by redox treatments,wa s relatively *** spin densities of VC/H2O2-HM readily returned to the original value under relatively high humidity and oxic *** this process,the HM-associated"unstable"free radicals released an electron to O2,inducing the formation of reactive oxygen species(ROS,i.e.,·OH and·O2-).Th e generated ROS promoted the degradation of polycyclic aromatic hydrocarbons based on the radical quenching *** transformation rates followed the order naphthalene>phenanthrene>anthracene>benzo[a]*** results provide valuable insight into the HM-induced transformation of organic contaminants under natural conditions.

关键词： Humic substance Polycyclic aromatic hydrocarbons(PAHs) Persistent free radicals(PFRs) Redox Reactive oxygen species(ROS)

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Review on reactive species in water treatment using electrical discharge plasma:formation, measurement, mechanisms and mass transfer

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Plasma Science and Technology 2018年第10期20卷 6-22页

作者： Yang CAO Guangzhou QU Tengfei LI Nan JIANG tiecheng wang College of Natural Resources and Environment Northwest A＆F UniversityYangling 712100People＇s Republic of China Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China Ministry of AgricultureYangling 712100People＇s Republic of China Institute of Electrostatics and Special Power Dalian University of TechnologyDalian 116024People＇s Republic of China

In the electrical discharge plasma process, various chemical and physical processes can participate in the removal of contaminants. In this paper, the chemical and physical processes that occur as a result of the electrical discharge plasma are reviewed, and their possible roles in the degradation of contaminants are discussed. Measurement methods for the quantification of important reactive species and their advantages and shortcomings are presented. Approaches on how to enhance the diffusion of the reactive species in solution are examined. In addition, the formation of typical reactive species in different electrical discharge plasma is compared.

关键词： advanced oxidation process electrical discharge plasma reactive species wastewater treatment

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Identification of sources,characteristics and photochemical transformations of dissolved organic matter with EEM-PARAFAC in the Wei River of China

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Frontiers of Environmental Science & Engineering 2021年第5期15卷 227-236页

作者： Yuanyuan Luo Yangyang Zhang Mengfan Lang Xuetao Guo Tianjiao Xia tiecheng wang Hanzhong Jia Lingyan Zhu College of Natural Resources and Environment Northwest A&F UniversityYangling712100China

Dissolved organic matter(DOM)in rivers is a critical regulator of the cycling and toxicity of pollutants and the behavior of DOM is a key indicator for the health of the *** investigated the sources and characteristics of DOM in surface water and sediment samples of the Wei River,*** organic carbon(DOC)concentration and ultraviolet absorbance at 254 nm(UV254)increased in the surface water and were decreased in the sediment downstream,indicating that the source of DOM in the water differed from the *** factor(PARAFAC)analysis of the excitation-emission matrices(EEM)revealed the presence of terrestrial humus-like,microbial humus-like and tryptophan-like proteins in the surface water,whereas the sediment contained UVA humic-like,UVC humic-like and fulvic-like in the *** DOM in the surface water and sediment were mainly derived from microbial metabolic activity and the surrounding *** water DOM displayed greater photodegradation potential than sediment *** analysis indicated that the terrestrial humic-like substance in the water and the fulvic-like component in the sediment decomposed more *** data describe the characteristics of DOM in the Wei River and are crucial to understanding the fluctuations in environmental patterns.

关键词： Dissolved organic matter Parallel factor analysis Excitation-emission matrices Photodegradation

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Viral vectored vaccines:design,development,preventive and therapeutic applications in human diseases

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Signal Transduction and Targeted Therapy 2023年第5期8卷 2113-2150页

作者： Shen wang Bo Liang Weiqi wang Ling Li Na Feng Yongkun Zhao tiecheng wang Feihu Yan Songtao Yang Xianzhu Xia Key Laboratory of Jilin Province for Zoonosis Prevention and Control Changchun Veterinary Research InstituteChinese Academy of Agricultural SciencesChangchunChina College of Veterinary Medicine Jilin UniversityChangchunChina China National Research Center for Exotic Animal Diseases China Animal Health and Epidemiology CenterQingdaoChina

Human diseases,particularly infectious diseases and cancers,pose unprecedented challenges to public health security and the global *** development and distribution of novel prophylactic and therapeutic vaccines are the prioritized countermeasures of human *** all vaccine platforms,viral vector vaccines offer distinguished advantages and represent prominent choices for pathogens that have hampered control efforts based on conventional vaccine ***,viral vector vaccines remain one of the best strategies for induction of robust humoral and cellular immunity against human *** viruses of different families and origins,including vesicular stomatitis virus,rabies virus,parainfluenza virus,measles virus,Newcastle disease virus,influenza virus,adenovirus and poxvirus,are deemed to be prominent viral vectors that differ in structural characteristics,design strategy,antigen presentation capability,immunogenicity and protective *** review summarized the overall profile of the design strategies,progress in advance and steps taken to address barriers to the deployment of these viral vector vaccines,simultaneously highlighting their potential for mucosal delivery,therapeutic application in cancer as well as other key aspects concerning the rational application of these viral vector *** and accurate technological advances in viral vector vaccines would consolidate their position as a leading approach to accelerate breakthroughs in novel vaccines and facilitate a rapid response to public health emergencies.

关键词： vaccines diseases protective

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Improved generation of correlated photon pairs from monolayer WS_2 based on bound states in the continuum

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Photonics Research 2019年第3期7卷 341-350页

作者： tiecheng wang ZHIXIN LI XIANGDONG ZHANG Beijing Key Laboratory of Nanophotonics & Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology

Entangled photons are the fundamental resource in quantum information processing. How to produce them efficiently has always been a matter of concern. Here we propose a new way to produce correlated photons efficiently from monolayer WS_2 based on bound states in the continuum(BICs). The BICs of radiation modes in the monolayer WS_2 are realized by designing the photonic crystal slab-WS_2-slab structure. The generation efficiency of correlated photon pairs from such a structure has been studied by using a rigorous quantum model of spontaneous parametric down-conversion with the plane wave expansion method. It is found that the generation efficiency of correlated photon pairs is greatly improved if the signal and idler fields are located at the BICs determined by the inverse scattering matrix of the structure. This is in contrast to the parametric down-conversion process for the enhanced generation of nonlinear waves if the pump field is located at the BICs determined by the scattering matrix of the structure. The generation rate of the correlated photon pairs can be improved by 7 orders of magnitude in some designed structures. The generated quantum signals are sensitive to the wavelength and exhibit narrowed relative line width, which is very beneficial for quantum information processing.

关键词： correlated photon pairs monolayer WS2 based bound states

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Improved third-order nonlinear effect in graphene based on bound states in the continuum

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Photonics Research 2017年第6期5卷 148-158页

作者： tiecheng wang XIANGDONG ZHANG Beijing Key Laboratory of Nanophotonics & Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Kunming Institute of Physics

The scattering matrix theory has been developed to calculate the third-order nonlinear effect in sphere-grapheneslab structures. By designing structural parameters, we have demonstrated that the incident electromagnetic wave can be well confined in the graphene in these structures due to the formation of a bound state in the continuum(BIC) of radiation modes. Based on such a bound state, third-harmonic(TH) generation and four-wave mixing(FWM) have been studied. It is found that the efficiency of TH generation in monolayer graphene can be enhanced about 7 orders of magnitude. It is interesting that we can design structure parameters to make all beams(the pump beam, probe beam, and generated FWM signal) be BICs at the same time. In such a case, the efficiency of FWM in monolayer graphene can be enhanced about 9 orders of magnitude. Both the TH and FWM signals are sensitive to the wavelength, and possess high Q factors, which exhibit very good monochromaticity. By taking suitable BICs, the selective generation of TH and FWM signals for S-and P-polarized waves can also be realized,which is beneficial for the design of optical devices.

关键词： FWM Improved third-order nonlinear effect in graphene based on bound states in the continuum

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Establishment and application of a surrogate model for human Ebola virus disease in BSL-2 laboratory

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Virologica Sinica 2024年第3期39卷 434-446页

作者： Wanying Yang Wujian Li Wujie Zhou Shen wang Weiqi wang Zhenshan wang Na Feng tiecheng wang Ying Xie Yongkun Zhao Feihu Yan Xianzhu Xia Hebei Key Lab of Laboratory Animal Science Department of Laboratory Animal ScienceHebei Medical UniversityShijiazhuang050017China Key Laboratory of Jilin Province for Zoonosis Prevention and Control Changchun Veterinary Research InstituteChinese Academy of Agricultural SciencesChangchun130122China College of Veterinary Medicine Jilin UniversityChangchun130062China College of Veterinary Medicine Jilin Agricultural UniversityChangchun130118China

The Ebola virus(EBOV)is a member of the Orthoebolavirus genus,Filoviridae family,which causes severe hemorrhagic diseases in humans and non-human primates(NHPs),with a case fatality rate of up to 90%.The development of countermeasures against EBOV has been hindered by the lack of ideal animal models,as EBOV requires handling in biosafety level(BSL)-4 ***,accessible and convenient animal models are urgently needed to promote prophylactic and therapeutic approaches against *** this study,a recombinant vesicular stomatitis virus expressing Ebola virus glycoprotein(VSV-EBOV/GP)was constructed and applied as a surrogate virus,establishing a lethal infection in *** infection with VSV-EBOV/GP,3-week-old female Syrian hamsters exhibited disease signs such as weight loss,multi-organ failure,severe uveitis,high viral loads,and developed severe systemic diseases similar to those observed in human EBOV *** animals succumbed at 2–3 days post-infection(dpi).Histopathological changes indicated that VSV-EBOV/GP targeted liver cells,suggesting that the tissue tropism of VSV-EBOV/GP was comparable to wild-type EBOV(WT EBOV).Notably,the pathogenicity of the VSV-EBOV/GP was found to be species-specific,age-related,gender-associated,and challenge ***,equine anti-EBOV immunoglobulins and a subunit vaccine were validated using this ***,this surrogate model represents a safe,effective,and economical tool for rapid preclinical evaluation of medical countermeasures against EBOV under BSL-2 conditions,which would accelerate technological advances and breakthroughs in confronting Ebola virus disease.

关键词： Ebola virus(EBOV) Recombinant vesicular stomatitis virus Pathogenicity Syrian hamster Surrogate models Vaccine evaluation and drug screening

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SARS-CoV-2 ORF10 suppresses the antiviral innate immune response by degrading MAVS through mitophagy

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Cellular & Molecular Immunology 2022年第1期19卷 67-78页

作者： Xingyu Li Peili Hou Wenqing Ma Xuefeng wang Hongmei wang Zhangping Yu Huasong Chang tiecheng wang Song Jin Xue wang Wenqi wang Yudong Zhao Yong Zhao Chunqing Xu Xiaomei Ma Yuwei Gao Hongbin He Ruminant Diseases Research Center College of Life SciencesShandong Normal UniversityJinan 250014People’s Republic of China Changchun Veterinary Research Institute Chinese Academy of Agricultural SciencesChangchun 130122People’s Republic of China

The global coronavirus disease 2019(COVID-19)pandemic caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has caused severe morbidity and mortality in *** is urgent to understand the function of viral ***,the function of open reading frame 10(ORF10),which is uniquely expressed by SARS-CoV-2,remains *** this study,we showed that overexpression of ORF10 markedly suppressed the expression of type I interferon(IFN-I)genes and IFN-stimulated ***,mitochondrial antiviral signaling protein(MAVS)was identified as the target via which ORF10 suppresses the IFN-I signaling pathway,and MAVS was found to be degraded through the ORF10-induced autophagy ***,overexpression of ORF10 promoted the accumulation of LC3 in mitochondria and induced ***,ORF10 was translocated to mitochondria by interacting with the mitophagy receptor Nip3-like protein X(NIX)and induced mitophagy through its interaction with both NIX and ***,knockdown of NIX expression blocked mitophagy activation,MAVS degradation,and IFN-I signaling pathway inhibition by *** with our observations,in the context of SARS-CoV-2 infection,ORF10 inhibited MAVS expression and facilitated viral *** brief,our results reveal a novel mechanism by which SARS-CoV-2 inhibits the innate immune response;that is,ORF10 induces mitophagy-mediated MAVS degradation by binding to NIX.

关键词： SARS-CoV-2 ORF10 MAVS NIX mitophagy

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An mRNA vaccine with broad-spectrum neutralizing protection against Omicron variant sublineages BA.4/5 -included SARS-CoV-2

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Signal Transduction and Targeted Therapy 2022年第11期7卷 4011-4013页

作者： Ye Sang Zhen Zhang Entao Li Haitao Lu Jinrong Long Yiming Cao Changxiao Yu tiecheng wang Jing Yang Shengqi wang Beijing Institute of Microbiology and Epidemiology Beijing100850China School of Life Science University of HebeiBaoding071002China Veterinary Research Institute Chinese Academy of Agricultural SciencesChangchun130000China

Dear Editor,The COVID-19 pandemic,caused by SARS-CoV-2,has resulted in more than 500 million confirmed cases,with over 6 million deaths by June *** the outbreak of the pandemic,five variants,including Alpha,Beta,Gamma,Delta,and Omicron,have been classified as *** a result of selection pressure and continued replication of the virus in human populations,new variants are sure to emerge,which will affect the spread of SARS-CoV-2 and vaccine efficacy.

关键词： vaccine neutral continued

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Inactivation Mechanisms of Escherichia Coli in Drinking Water Using Reactive Species Generated from a Surface Discharge

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高电压技术 2013年第9期39卷 2119-2124页

作者： LI Jie SHANG Kefeng wang tiecheng LU Na wang Tianwei WU Yan Institute of Electrostatics and Special Power Dalian University of Technology Dalian 116024 China

Bacterial and chemical contaminations of drinking water imperil the health of people.A reactive species injection method is presented for sterilizing drinking *** produce reactive species,a gas phase surface discharge reactor(SDR)is designed:a spiral stainless steel wire attached on the inside wall of a quartz glass tube is used as the high voltage electrode,and the drinking water is the ground *** performance and mechanisms of the method in inactivating of Escherichia coli(***)are *** results show that 500 mL ***-contaminated drinking water(108CFU/mL)is completely sterilized within 4 *** on the scanning electron microscope(SEM)analysis,there were plasma-induced cell structure damages of the *** in the sterilized water,and the damage resulted in the leakage of protein,which was proved by chemical ***,the heating effect concomitantly generated by discharge plasma does not influence *** inactivation,and the contribution of direct ultraviolet(UV)irradiation could be neglected *** ozone generated by SDR and the hydroxyl radicals(·OH)subsequently generated in drinking water play the decisive roles in *** inactivation because these reactive species cause the cell rupture.

关键词：饮用水消毒大肠杆菌表面放电型活性物种机制灭活放电等离子体扫描电子显微镜

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