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Facile low-temperature supercritical carbonization method to prepare high-loading nickel single atom catalysts for efficient photodegradation of tetracycline

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Journal of Environmental Sciences 2024年第4期138卷 373-384页

作者： Han Qiao Lirong Zheng shiwen Hu Gang Tang Hongri Suo Chongxuan Liu School of Environment Harbin Institute of TechnologyHarbin 150090China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Beijing Synchrotron Radiation Facility(BSRF) Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Environmental photocatalysis is a promising technology for treating antibiotics in *** this study,a supercritical carbonization method was developed to synthesize a single-atom photocatalyst with a high loading of Ni(above 5 wt.%)anchored on a carbonnitrogen-silicate substrate for the efficient photodegradation of a ubiquitous environmental contaminant of tetracycline(TC).The photocatalyst was prepared from an easily obtained metal-biopolymer-inorganic supramolecular hydrogel,followed by supercritical drying and carbonization *** low-temperature(300℃)supercritical ethanol treatment prevents the excessive structural degradation of hydrogel and greatly reduces the metal clustering and aggregation,which contributed to the high Ni *** characterizations confirmed that Ni was present at isolated sites and stabilized by Ni-N and Ni-O bonds in a Ni-(N/O)_(6)-C/SiC configuration.A 5%Ni-C-Si catalyst,which performed the best among the studied catalysts,exhibited a wide visible light response with a narrow bandgap of 1.45 eV that could efficiently and repeatedly catalyze the oxidation of TC with a conversion rate of almost 100% within 40 *** reactive species trapping experiments and electron spin resonance(ESR)tests demonstrated that the h+,and·O_(2)-were mainly responsible for TC *** TC degradation mechanism and possible reaction pathways were provided ***,this study proposed a novel strategy to synthesize a high metal loading singleatom photocatalyst that can efficiently remove TC with high concentrations,and this strategy might be extended for synthesis of other carbon-based single-atom catalysts with valuable properties.

关键词： Carbon-based single-atom catalyst Nickel Photocatalytic degradation Tetracycline Visible light

Hydroxyl radical production by abiotic oxidation of pyrite under estuarine conditions:The effects of aging,seawater anions and illumination

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Journal of Environmental Sciences 2024年第1期135卷 715-727页

作者： Ruixue Liu Yinshun Dai Yucheng Feng shiwen Sun Xiaodong Zhang Chunjiang An Shan Zhao Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and EngineeringShandong UniversityQingdao 266237China Department of Building Civil and Environmental EngineeringConcordia UniversityMontrealQC H3G 1M8Canada

Pyrite is widely distributed in estuarine sediments as an inexpensive natural Fenton-like reagent,however,the mechanism on the hydroxyl radical(HO^(·))production by pyrite under estuarine environmental conditions is still poorly *** batch experiments were performed to investigate the effects of estuarine conditions including aging(in air,in water),seawater anions(Cl^(-),Br^(-)and HCO_(3)^(-))and light on the HO^(·)production by pyrite *** one-electron transfer dominated the process from O_(2) to HO^(·)induced by oxidation of *** Fe(oxyhydr)oxide coatings on the surface of pyrite aged in air and water consumed hydrogen peroxide while mediating the electron transfer,and the combined effect of the two resulted in a suppression of HO^(·)production in the early stage of aging and a promotion of HO^(·)production in the later stage of *** of the surface oxide layers by aggressive anions was the main reason for the inhibition of HO^(·)production by Cl^(-)and Br^(-),and the generation of Cl^(·)and Br^(·)may also play a role in the scavenging of HO^(·).HCO_(3)^(-)increased the average rate of HO^(·)production through surface-CO_(2) complexes formed by adsorption on the surface of *** significant enhancement of HO^(·)production under light was attributed to the formation of photoelectrons induced by photochemical reactions on pyrite and its surface oxide *** findings provide new insights into the environmental chemical behavior of pyrite in the estuary and enrich the understanding of natural remediation of estuarine environments.

关键词： Hydroxyl radical Pyrite oxidation Aging Anions Irradiation

Increasing rainfed wheat yield by optimizing agronomic practices to consume more subsoil water in the Loess Plateau

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The Crop Journal 2021年第6期9卷 1418-1427页

作者： Wenjia Yang Weijian Liu Yulin Li shiwen wang Lina Yin Xiping Deng State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau College of Natural Resources and EnvironmentNorthwest A&F UniversityYangling 712100ShaanxiChina College of Life Sciences Northwest A&F UniversityYangling 712100ShaanxiChina Institute of Soil and Water Conservation Northwest A&F UniversityYangling 712100ShaanxiChina Institute of Soil and Water Conservation Chinese Academy of Sciences&Ministry of Water ResourcesYangling 712100ShaanxiChina

Erratic rainfall and misalignment between the rainy season and the growing season of winter wheat greatly limit rainfed winter wheat yield in the Loess Plateau of China. To increase the grain yield of winter wheat in this region, the effects of different agronomic practices, including adjusting planting pattern(NR, narrow row spacing), increasing seeding rate(high seeding rate, HS), decreasing basal nitrogen rate and increasing top-dressed nitrogen rate(DBN), and replacing an old cultivar with a new cultivar(NC) on wheat yield were investigated for two consecutive years. The results showed that the current grain yield of rainfed winter wheat in the Loess Plateau could be increased to 5879–7093 kg ha^(-1) by HS, DBN and NC practices relative to the practice of high-yielding farmers(PF). The increased yield due to HS, DBN and NC was attributed to the higher number of spikes ha^(-1), 1000-grain weight, and kernels spike^(-1). Before the flowering stage, HS increased soil water consumption(SWC) in 1–3 m subsoil due to the higher plant population compared with that of PF, whereas DBN decreased SWC in the 0–2 m soil layer compared with that of PF. After the flowering stage, HS, DBN, and NC increased SWC by 8–16 mm in 2–3 m subsoil compared to PF. The water use efficiency(WUE) was increased under DBN and NC in comparison with ***, the WUE did not increase under HS as it had the highest evapotranspiration among the five treatments. Increasing the use of subsoil water during the late growth stage by optimizing agronomic practices or applying new cultivars with expansive roots should be the primary approach to increase rainfed winter wheat yield in this region.

关键词： Winter wheat Agronomic practices Soil water consumption Grain yield Loess Plateau

Nasal delivery of broadly neutralizing antibodies protects mice from lethal challenge with SARS-CoV-2 delta and omicron variants

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Virologica Sinica 2022年第2期37卷 238-247页

作者： Jia Lu Qiangling Yin Rongjuan Pei Qiu Zhang Yuanyuan Qu Yongbing Pan Lina Sun Ding Gao Cuiqin Liang Jingwen Yang Wei Wu Jiandong Li Zongqiang Cui Zejun wang Xinguo Li Dexin Li shiwen wang Kai Duan Wuxiang Guan Mifang Liang Xiaoming Yang National Engineering Technology Research Center for Combined Vaccines Wuhan Institute of Biological Products Co.Ltd.Wuhan430070China State Key Laboratory for Molecular Virology and Genetic Engineering National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing102206China Center for Emerging Infectious Diseases Wuhan Institute of VirologyChinese Academy of SciencesWuhan430071China CDC-WIV Joint Research Center for Emerging Diseases and Biosafety Wuhan430071China Institution of Infectious Diseases Shenzhen Bay LaboratoryShenzhen518107China

Multiple new variants of severe acute respiratory syndrome coronavirus 2(SARS-Co V-2)have constantly emerged,as the delta and omicron variants,which have developed resistance to currently gained neutralizing *** highlights a critical need to discover new therapeutic agents to overcome the variants *** the availability of vaccines against coronavirus disease 2019(COVID-19),the use of broadly neutralizing antibodies has been considered as an alternative way for the prevention or treatment of SARS-Co V-2 variants ***,we show that the nasal delivery of two previously characterized broadly neutralizing antibodies(F61 and H121)protected K18-h ACE2 mice against lethal challenge with SARS-Co V-2 *** broadly protective efficacy of the F61 or F61/F121 cocktail antibodies was evaluated by lethal challenge with the wild strain(WIV04)and multiple variants,including beta(B.1.351),delta(B.1.617.2),and omicron(B.1.1.529)at 200or 1000 TCID_(50),and the minimum antibody administration doses(5-1.25 mg/kg body weight)were also evaluated with delta and omicron *** prophylactic protections were found in all challenged groups with both F61 and F61/H121 combination at the administration dose of 20 mg/kg body weight,and corresponding mice lung viral RNA showed negative,with almost all alveolar septa and cavities remaining ***,low-dose antibody treatment induced significant prophylactic protection against lethal challenge with delta and omicron variants,whereas the F61/H121 combination showed excellent results against omicron *** findings indicated the potential use of broadly neutralizing monoclonal antibodies as prophylactic and therapeutic agent for protection of current emerged SARS-Co V-2 variants infection.

关键词： Coronavirus disease 2019(COVID-2019) Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) Prophylactic protection Omicron variant K18-h ACE2

Immunogenicity and protective efficacy of an inactivated SFTS vaccine candidate in mice

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Biosafety and Health 2022年第1期4卷 45-52页

作者： Aqian Li Xinxian Dai Lei Chen Lin Liu Chuan Li Yang Liu Wei Wu Xiaoxia Huang Jiandong Li shiwen wang Mifang Liang Xiuling Li Dexin Li Department of Viral Hemorrhagic Fever National Institute for Viral Disease Control and PreventionChina CDCBeijing 102206China b National Vaccine and Serum Institute Beijing 102206China Suzhou Institute of Systems Medicine Suzhou 215123China China CDC-WIV Joint Research Center for Emerging Diseases and Biosafety Center for Biosafety Mega-ScienceChinese Academy of SciencesWuhan 430071China

Severe fever with thrombocytopenia syndrome(SFTS),caused by a novel identified bunyavirus SFTS virus(SFTSV),was an emerging viral infectious disease that was firstly reported in *** are no licensed vaccines and therapeutics against SFTSV currently.B‐Propiolactone(BPL)inactivated whole virions of SFTSV strain AH12 were prepared as experimental vaccine in different antigen dose with or without Al(OH)3 *** experimental SFTS vaccine was a satisfying immunogen,which could efficiently trigger the development of high levels of SFTSV NP‐specific IgG antibodies and neutralizing antibodies against SFTSV Strain HB29 in BALB/c and C57/BL6 mice,and could induce SFTS virus‐specific cellular immune responses to a certain extent.A single dose of vaccine was immunogenically insufficient in BALB/c mice;the second and third dose resulted in significant boost in antibody *** use of Al(OH)3 adjuvant resulted in higher antibody *** mediate‐dose of vaccine could induce as high and equivalent level of antibody titer as that of high‐*** experimental SFTS vaccine in mediate‐and high antigen dose with adjuvant resulted in solid protection of C57/BL6 mice against wild‐type SFTSV challenge with markedly accelerated virus clearance from blood and spleen compared with *** experimental SFTS vaccine prepared in this study could efficiently elicit virus specific humoral and cellular immune responses in both BALB/c and C57/BL6 mice,and could protect C57/BL6 mice against SFTS virus *** results supplied evidence that inactivated vaccine was a promising vaccine candidate for the prevention of SFTSV infection.

关键词： SFTS virus Inactivated vaccine Immunogenicity Protective efficacy

Genomic Surveillance for SARS-CoV-2—China,September 26,2022 to January 29,2023

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China CDC weekly 2023年第7期5卷 143-151页

作者： shiwen wang Peihua Niu Qiudong Su Xiaozhou He Jing Tang Ji wang Yenan Feng Cao Chen Xiang Zhao Zhixiao Chen Wenling wang Zeyuan Yin Yuchao Wu Changcheng Wu Lili Li Aili Cui Yan Zhang Caiyun Long Xiaoyu Yang Zhongxian Zhang Hong Bo Wenbo Xu SARS-CoV-Genome Working Group National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina National Health Commission Key Laboratory for Medical Virology and Viral Diseases BeijingChina 不详

Introduction:The severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has generated 2,431 variants over the course of its global transmission over the past 3 *** better evaluate the genomic variation of SARS-CoV-2 before and after the optimization of coronavirus disease 2019(COVID-19)prevention and control strategies,we analyzed the genetic evolution branch composition and genomic variation of SARS-CoV-2 in both domestic and imported cases in China(the data from Hong Kong and Macao Special Administrative Regions and Taiwan,China were not included)from September 26,2022 to January 29,***:Analysis of the number of genome sequences,sampling time,dynamic changes of evolutionary branches,origin,and clinical typing of SARS-CoV-2 variants submitted by 31 provincial-level administrative divisions(PLADs)and Xinjiang Production and Construction Corps(XPCC)was conducted to assess the accuracy and timeliness of SARS-CoV-2 variant ***:From September 26,2022 to January 29,2023,20,013 valid genome sequences of domestic cases were reported in China,with 72 evolutionary ***,1,978 valid genome sequences of imported cases were reported,with 169 evolutionary *** prevalence of the Omicron variants of SARS-CoV-2 in both domestic and imported cases was consistent with that of international epidemic ***:This study provides an overview of the prevalence of Omicron variants of SARS-CoV-2 in *** optimizing COVID-19 prevention and control strategies,no novel Omicron variants of SARSCoV-2 with altered biological characteristics or public health significance have been identified since December 1,2022.

关键词： prevention imported Taiwan

Dynamic coupling of ferrihydrite transformation and associated arsenic desorption/redistribution mediated by sulfate-reducing bacteria

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Journal of Environmental Sciences 2024年第1期135卷 39-50页

作者： Wenjing Zhou Huiyan Zhu shiwen Hu Bowei Zhang Kun Gao Zhi Dang Chongxuan Liu State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSouth China University of TechnologyGuangzhou 510006China

Sulfate-reducing bacteria play an important role in the geochemistry of iron(oxyhydr)oxide and arsenic(As)in natural environments;however,the associated reaction processes are yet to be fully *** this study,batch experiments coupled with geochemical,spectroscopic,microscopic,and thermodynamic analyses were conducted to investigate the dynamic coupling of ferrihydrite transformation and the associated As desorption/redistribution mediated by Desulfovibrio vulgaris(***).The results indicated that *** could induce ferrihydrite transformation via S^(2-)-driven and direct reduction *** the absence of SO_(4)^(2-),*** directly reduced ferrihydrite,and As desorption and re-sorption occurred simultaneously during the partial transformation of ferrihydrite to *** increase in SO_(4)^(2-)loading promoted the S^(2-)-driven reduction of ferrihydrite and accelerated the subsequent mineralogical *** the low and medium SO_(4)^(2-)treatments,ferrihydrite was completely transformed to a mixture of magnetite and mackinawite,which increased the fraction of As in the residual phase and stabilized *** the high SO_(4)^(2-)treatment,although the replacement of ferrihydrite by only mackinawite also increased the fraction of As in the residual phase,22.1%of the total As was released into the solution due to the poor adsorption affinity of As to mackinawite and the conversion of As^(5+)to As^(3+).The mechanisms of ferrihydrite reduction,mineralogy transformation,and As mobilization and redistribution mediated by sulfate-reducing bacteria are closely related to the surrounding SO_(4)^(2-)*** results advance our understanding of the biogeochemical behavior of Fe,S,and As,and are helpful for the risk assessment and remediation of As contamination.

关键词： Sulfate-reducing bacteria Arsenic Ferrihydrite Transformation Redistribution

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入侵植物一年蓬基因组DNA提取方法优化

安徽农学通报 2024年第13期30卷 66-70页

作者：王仕文杨子琼魏淑雅丁彤顾婉如陈雨蓓屈利利童跃伟安庆师范大学生命科学学院/水生生物保护与水生态修复安徽省高等学校工程技术研究中心安徽安庆246133

一年蓬为菊科飞蓬属植物,是分布较广、危害较重的一种外来入侵杂草。为优选该植物基因组DNA的提取方法,本研究采取四因素三水平正交试验设计,对一年蓬基因组DNA的十六烷基三甲基溴化铵(CTAB)提取方法进行优化,并与常规的植物基因组试剂... 详细信息

一年蓬为菊科飞蓬属植物,是分布较广、危害较重的一种外来入侵杂草。为优选该植物基因组DNA的提取方法,本研究采取四因素三水平正交试验设计,对一年蓬基因组DNA的十六烷基三甲基溴化铵(CTAB)提取方法进行优化,并与常规的植物基因组试剂盒法进行对比。结果表明,一年蓬基因组DNA较优的提取方法为改良CTAB法,即一年蓬的干燥叶片经CTAB-free去除多糖,并加入β-巯基乙醇防止酚氧化,用氯仿∶异戊醇(24∶1)抽提3次。改良CTAB法提取的一年蓬基因组DNA质量较高,微量分光光度计检测的A_(260)/A_(280)数值接近1.8~2.0,且凝胶电泳DNA条带清晰,无明显拖带。该方法为该植物的遗传多样性和入侵机制等研究提供参考。

关键词：菊科一年蓬 DNA提取方法改良CTAB法正交试验

Introduction to a new clinical entity:the multiple organ dysfunction syndrome in the elderly

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Journal of Geriatric Cardiology 2004年第1期1卷 55-57页

作者： shiwen wang lnstitute of Geriatric Cardiology Chinese PL4 General HospitalBeing 100853China

Multiple organ dysfunction syndrome in the elderly (MODSE) is an important syndrome in the critical care of elderly patients. MODSE is defined as simultaneous or sequential dysfunction or failure of two or more organs on the top of advanced age and chronic multiple organ dysfunction. MODSE is triggered by precipitating factors such as infection (usually pulmonary infection) trauma,surgery, etc. It occurs in two phases. In the early phase, dysfunction of multiple organs (MODE) occurs,and in the later or severe phase, multiple organ failure (MOFE) occurs. MODSE is the most common cause of mortality in the critically iii elderly patient. It is important to understand its clinical characteristics and elucidate its pathogenesis in order to reduce mortality and improve quality of life for these patients.

关键词： SW MODSE MOFE