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Distribution of mercury and methylmercury in river water and sediment of typical manganese mining area

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Journal of Environmental Sciences 2022年第9期34卷 11-22页

作者： Yongjiang Zhang Tao Sun Ming Ma Xun Wang qing xie Cheng Zhang Yongmin Wang Dingyong Wang College of Resources and Environment Southwest UniversityChongqing 400715China Department of Environment and Quality Test Chongqing Chemical Industry Vocational CollegeChongqing 401220China School of Agricultural Sciences Zhengzhou UniversityZhengzhou 450001China

Manganese(Mn) ores contain substantial concentrations of mercury(Hg), and mining and smelting of Mn ores can bring Hg into the surrounding aquatic environment through atmospheric deposition, leaching of electrolytic Mn residue and Mn gangue dump. However, limited is known that how these processes influence the environmental behaviors of Hg in waterbody. Therefore, the seasonal distribution and existing form of Hg in water and sediment in one Mn ore area in Xiushan County, Chongqing were investigated. Our results showed that the mean Hg and methylmercury(Me Hg) concentrations in water( n = 35) were 5.8 ± 4.6 ng/L and 0.22 ± 0.14 ng/L, respectively. The mean Hg concentrations in retained riverbed and fluvial bank sediment( n = 35) were 0.74 ± 0.26 mg/kg and 0.63 ± 0.27 mg/kg, respectively(the mean Me Hg concentrations were 0.64 ± 0.40 μg/kg and 0.51 ± 0.30 μg/kg, respectively). It indicated that the mining and smelting of Mn ores were the main sources of anthropogenic Hg, and Mn may inhibit Hg methylation in rivers in Mn ore areas. Mercury in the bound to iron/Mn(Fe/Mn) oxides of low crystallinity fraction(Hg-OX) accounted for 4.01% and 5.25% of the total Hg concentrations in the retained riverbed and fluvial bank sediment, respectively. The amount of Hg bound to Fe/Mn oxides in sediment increased significantly due to the manganese mining activities in the investigated area. Therefore, it could be hypothesized that high Hg concentrations in river sediment in Mn mining areas are closely related to high Mn concentration in sediment.

关键词： Mn mining area Hg MeHg Distribution characteristics Fractionation of Hg

EQCM study on poly(aminothiophenol) monolayer

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Chinese Chemical Letters 1997年第6期8卷 533-534页

作者： qing Ji xie Ming MA (Department of Chemistry, Hunan Normal University, Changsha 410081) HUNAN NORMAL UNIV DEPT CHEMCHANGSHA 410081PEOPLES R CHINA

In this letter, we report EQCM studies on the electrochemistry of poly(aminothiophenol) monolayer on Au in aqueous solutions. Results show that the monolayer polymer investigated exhibits only a one-step proton-involv... 详细信息

关键词： EQCM study on poly aminothiophenol monolayer

A Superhydrophobic Hydrogel for Self-Healing and Robust Strain Sensor with Liquid Impalement Resistance

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Chinese Journal of Chemistry 2021年第12期39卷 3393-3398页

作者： Peng Wang Tao Chen Xuesong Zhang Wei Duan Chongyuan Zhang Huilong Han qing xie School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaodingHebei 071003China Hebei Key Laboratory of Electric Machinery Health Maintenance&Failure Prevention North China Electric Power UniversityBaodingHebei 071003China School of Electrical and Electronic Engineering North China Electric Power UniversityBaodingHebei 071003China

The superhydrophobic strain sensor is a fantastic direction,which could protect the strain sensor in harsh ***,the self-healing superhydrophobic strain sensor has not been *** this research,we developed a superhydrophobic strain sensor,which demonstrated excellent self-healing,mechanical robustness,and liquid impalement resistance *** key innovation is to partially embed hydrophobic graphene and carbon nanotubes into the hydrogel *** hodrogel substrate endows the sample with self-healing *** graphene,carbon nanotubes and hydrogel together lead to an accurate and real-time monitoring of human ***,the prepared sample demonstrated super-robust superhydrophobicity,which retained superhydrophobicity after many kinds of damage(such as 1000%stretch,10000 stretching-releasing cycles,hand-rub,tape-peeling,and high-speed drop/jet impact).

关键词： Hydrophobic effect Gels Graphene Strain sensor Self-healing

Laboratory-based Surveillance and Clinical Profile of Sporadic HEV Infection in Shanghai,China

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Virologica Sinica 2021年第4期36卷 644-654页

作者： Jie Lu qing Li Jiayuan Jiang Ziqiang Li Peiyun Wang Zike Sheng Rongtao Lai Huijuan Zhou Wei Cai Hui Wang qing Guo Honglian Gui qing xie Department of Infectious Diseases Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Clinical Research Institute Shanghai Jiao Tong University School of MedicineShanghai 200025China

The study aimed to describe the epidemiological,virological and clinical features of sporadic HEV infection in eastern China.A total of 6112 patient sera were tested for anti-HEV IgG or anti-HEV IgM during one consecutive year(between August 2018 and July 2019).HEV RNA presence was evaluated by RT-PCR and HEV sequences were phylogenetically *** features of confirmed HEV-infected patients were *** sero-positivity rate of anti-HEV IgG maintained stable around 40%,while an obvious winter spike of anti-HEV IgM prevalence was observed.A total of 111 patients were confirmed of HEV viremia by molecular *** 4d was *** analyses suggest that certain strains circulate across species and around the *** with confirmed current HEV infection had a high median age(58 years)and males were predominant(62.2%).Most patients presented with jaundice(75.7%)and anorexia(68.0%).Significantly elevated levels of liver enzymes and bilirubin were ***,the baseline bilirubin level was positively correlated with illness ***-existing HBV carriage may deteriorate *** clinical burden caused by locally acquired HEV infection is *** should be enforced especially during the transition period from winter to *** with higher level of bilirubin at disease onset had slower recovery from HEV infection.

关键词： Hepatitis E virus(HEV) Seroprevalence Genotyping Epidemiology Surveillance

General principles to high-throughput constructing two-dimensional carbon allotropes

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Chinese Physics B 2020年第3期29卷 375-384页

作者： qing xie Lei Wang Jiangxu Li Ronghan Li Xing-Qiu Chen Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

We propose general principles to construct two-dimensional(2D)single-atom-thick carbon *** can be viewed as the generalization of patterning Stone–Walse defects(SWDs)by manipulating bond rotation and of patterning inverse SWDs by adding(or removing)carbon pairs on the pristine graphene,*** these principles,numerous 2D allotropes of carbon can be systematically *** 20 constructed 2D allotropes as prototypical and benchmark examples,besides nicely reproducing all well-known ones,such as pentaheptites,T-graphene,OPGs,etc,we still discover 13 new *** structural,thermodynamic,dynamical,and electronic properties are calculated by means of first-principles *** these allotropes are metastable in energy compared with that of graphene and,except for OPG-A and C3-10-H allotropes,the other phonon spectra of 18 selected allotropes are dynamically *** particular,the proposed C3-11 allotrope is energetically favorable than graphene when the temperature is increased up to 1043 K according to the derived free *** electronic band structures demonstrate that(i)the C3-8 allotrope is a semiconductor with an indirect DFT band gap of 1.04 e V,(ii)another unusual allotrope is C3-12 which exhibits a highly flat band just crossing the Fermi level,(iii)four allotropes are Dirac semimetals with the appearance of Dirac cones at the Fermi level in the lattices without hexagonal symmetry,and(vi)without the spin–orbit coupling(SOC)effect,the hexagonal C3-11 allotrope exhibits two Dirac cones at K and K points in its Brillouin zone in similarity with graphene.

关键词： graphene allotropes phonon spectra semimetal dirac Fermions modeling

The synergistic effect of micro structure/nanofiller/superhydrophobicity on the surface flashover

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High Voltage 2022年第6期7卷 1091-1098页

作者： qing xie Guoshuang Ma Peng Wang Xuesong Zhang Jiyuan Yan Zhaochen Liu Fangcheng Lü School of Electrical and Electronic Engineering North China Electric Power UniversityBaodingChina School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaodingChina

The surface flashover is affected by many factors,such as surface roughness,nanofillers and chemical functional *** this research study,polyamide mesh was utilised as a scaffold to systematically study the synergistic effect of micro structure/nanofiller/superhydrophobicity on the surface *** on the dissolution and resolidification method,nanofillers were partially embedded into the mesh ***,Al_(2)O_(3)nanoparticles were used as a typical non-conductive nanofiller,and carbon nanotubes were used as a typical conductive ***,the micro structure was determined by altering the mesh size,and chemical fluorination was utilised to change the surface chemical *** was found that the polyamide mesh with 300#demonstrated best anti-flashover *** fluorination could effectively improve the flashover *** further adjusting the ratio of Al_(2)O_(3)to carbon nanotubes,the flashover voltage can be increased by up to 30%.

关键词： filler surface structure

Circular RNA ciRS-7 promotes the proliferation and metastasis of pancreatic cancer by regulating miR-7-mediated EGFR/STAT3 signaling pathway

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Hepatobiliary & Pancreatic Diseases International 2019年第6期18卷 580-586页

作者： Lei Liu Fu-Bao Liu Mei Huang Kun xie qing-Song xie Chen-Hai Liu Min-Jing Shen Qiang Huang Clinical Medical College Shandong UniversityJinan 250012China Department of General Surgery The First Affiliated Hospital of Anhui Medical UniversityHefei 230022China Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery Hefei 230001China Department of General Surgery Anhui Provincial HospitalHefei 230001China

Background: Pancreatic ductal adenocarcinoma(PDAC) is the most deadly type of tumor, and its pathogenesis remains unknown. Circular RNAs(circRNAs) may be functional and bind to micro RNAs and consequently, influence the activity of targeted mRNAs. Recent researches indicate that one circRNA, ciRS-7, acts as a sponge of miR-7 and thus, inhibits its activity. It is well known that miR-7 is a cancer suppressor in many cancers. However, the relationship between ciRS-7 and miR-7, and the role of ciRS-7 in PDAC, remains to be elucidated. Methods: miR-7 and ciRS-7 expression in 41 pairs of PDAC tumors and their paracancerous tissues were detected by quantitative reverse transcription polymerase chain reaction(qRT-PCR). The relationships between their expression levels and clinicopathological features in PDAC tissues were assessed. The relationship between miR-7 and ciRS-7 was also assessed by Spearman’s correlation. We also used cell lines to evaluate the role of ciRS-7 in cell line behavior. The ciRS-7 interfere RNA(si RNA) and its empty vector were transfected into PDAC cells. PDAC cells proliferation and invasion abilities were detected by MTT assay and invasion analysis. The expression of proteins was assessed by Western blotting. Results: ciRS-7 expression was significantly higher in PDAC tissues than paracancerous tissues( P = 0.002). However, miR-7 expression showed the opposite trend( P = 0.048). Moreover, ciRS-7 expression was inversely correlated with miR-7 in PDAC( r s =-0.353, P = 0.023). ciRS-7 expression was also significantly elevated in venous invasion(3.72 ± 2.93 vs. 2.14 ± 1.26;P = 0.028) and lymph node metastasis(4.19 ± 2.75 vs. 2.32 ± 1.90;P = 0.016) in PDAC patients. Furthermore, ciRS-7 knockdown suppressed cell proliferation and invasion of PDAC cells( P < 0.05), and the downregulation of ciRS-7 resulted in miR-7 overexpression and subsequent inhibition of epidermal growth factor receptor(EGFR) and signal transducer and activator of transcription 3(ST

关键词： ciRS-7 miR-7 EGFR/STAT3 pathway PDAC

A nonlinear creep damage model for gelled waxy crude

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Petroleum Science 2022年第4期19卷 1803-1811页

作者： Hong-Ying Li qing-Bo xie Hao Sun Wei Guo Feng Yan qing Miao Chao-Fei Nie Yu Zhuang Qian Huang Jin-Jun Zhang National Engineering Laboratory for Pipeline Safety/MOE Key Laboratory of Petroleum Engineering/Bejing Key Laboratory of Urban Oil&Gas Distribution Technology/China Universityof Petroleum Beijing102249China PipeChina Pipeline R&DCenter Langfang065000China Jinan Urban Planning and Design Institute Jinan250101China

Yielding behaviors of waxy crude oil is one of the key issues of flow assurance challenges. The yielding of waxy crude under constant stress is actually a creep process of strain accumulation to structural failure,to describe the process completely and accurately is the basis of numerical simulation of restart process of the pipeline. The creep and yield behaviors of two gelled waxy crudes were investigated experimentally under different constant applied stresses. The results clearly show that the creep process of waxy crude is related to the applied stress and time. The greater the applied stress, and the longer the loaded time, the more obvious the nonlinear features. Based on the fractional calculus theory, a fractional viscous element was developed to describe the decelerated and steady creep process of gelled waxy crude. On the basis of the damage theory, an elastic damage element was proposed to describe the accelerated creep after the yielding. According to the idea of mechanical analogy, a nonlinear creep model was established by a fractional viscous element, an elastic damaged element, and an elastic element in series, which can accurately describe the whole creep and yielding process of gelled waxy crude.

关键词： Waxy crude oil Rheology Yield Creep Constitutive model Mechanical analogy

High-resolution gene profiling of infection process indicates serine metabolism adaptation of Fusarium graminearum in host

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Science Bulletin 2017年第11期62卷 758-760页

作者： qing-Ning xie Lei-Jie Jia Yan-Zhang Wang Ren-Tao Song Wei-Hua Tang School of Life Sciences Shanghai University National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyShanghai Institutes for Biological SciencesChinese Academy of Sciences

Fusarium graminearum,an important fungal pathogen,can cause head blight,seedling blight and crown rot on wheat(Triticum aestivum),stalk rot and ear rot on maize(Zea mays)[1,2].Annually,billions of dollars are lost wor... 详细信息

关键词：禾谷镰刀菌感染过程基因分析高分辨率酸代谢脱氧雪腐镰刀菌烯醇菌丝宿主