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Fabrication of n-CQDs@W_(18)O_(49) heterojunction with enhanced charge separation and photocatalytic performance under full-spectrum ligh irradiation

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Chinese Chemical Letters 2021年第10期32卷 3180-3184页

作者： ju Huang Jiawen Wang Zhengjia Hao Chensha Li Binsong Wang Yang Qu Department of environmental Science School of Chemistry and Materials ScienceKey Laboratory of Functional Inorganic Material ChemistryMinistry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080China

Increasing the charge separation and the utilization efficiency of sunlight are essential factors in a photocatalytic *** this study,we prepared crystalline.n-CQDs@W_(18) O_(49) heterostructures,through the in situ growth of W_(18) O_(49) nanocrystals on nitrogen-doped carbon quantum dots(n-CQDs).n-CQDs@W_(18) O_(49) nanocomposites showed high activity in the photodegradation of ciprofloxacin(CIP)and methyl orange(MO).The photodegradation activity of the optimized n-CQDs@W_(18) O_(49)-5 sample was four times higher than that of W_(18) O_(49) under ultraviolet-visible(UV–vis) light *** photodegradation activity of n-CQDs@W_(18) O_(49)-5 sample was two times higher than that of W_(18) O_(49) under near-infrared(nIR) light *** enhanced photosensitivity of the.nanocomposites was attributed to the promotion of charge separation by n-CQDs and the local surface plasmon resonance(LSPR) effect of W_(18) O_(49) under nIR light *** work provides a promising approach for designing and manufacturing photocatalysts with full-spectral responsiveness and improved charge separation.

关键词： Photocatalysis Full-spectrum light Tungsten oxide Localized surface plasmon resonance nitrogen-doped carbon quantum dots

Asymptotic normality of Pseudo-LS estimator of error Variance in Partly Linear Autoregressive Models

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Chinese Quarterly Journal of Mathematics 2006年第4期21卷 617-622页

作者： WU Xin-qian TIAn Zheng ju Yan-wei Department of Applied Mathematics Northwestern Polytechnieal University Xi＇an 710072 China national Key Laboratory of Patte.n Recognition Beijing 100080 China Institute of Automation Chinese Academy of Sciences Beijing 100080China

Consider the model Yt = βYt-1＋g（Yt-2）＋εt for 3 〈 t 〈 T. Hereg is anunknown function, β is an unknown parameter, εt are i.i.d, random errors with me.n 0 andvariance σ2 and the fourth moment α4, and α4 are independent of Y8 for all t ≥ 3 and s = 1, ***-LS estimators σ, σ2T α4τ and D2T of σ^2,α4 and Var（ε2↑3） are respectively constructedbased on piecewise polynomial approximator of g. The weak consistency of α4T and D2T are proved. The asymptotic normality of σ2T is given, i.e., √T（σ2T -σ^2）/DT converges indistribution to n（0, 1）. The result can be used to establish large sample interval estimatesof σ^2 or to make large sample tests for σ^2.

关键词： partly linear autoregressive model error variance piecewise polynomial pseudo-LS estimation weak consistency asymptotic normality

Usefulness of colonic tattooing using indocyanine gre.n in patients with colorectal tumors

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World Journal of Clinical Cases 2018年第13期6卷 632-640页

作者： Jae Ho Park Hee Seok Moon In Sun Kwon Gee Young Yun Seo Hee Lee Dae Hwa Park ju Seok Kim Sun Hyung Kang eaum Seok Lee Seok Hyun Kim Jae Kyu Sung Byung Seok Lee Hyun Yong jeong Division of Gastroenterology Department of Internal Medicine Chungnam National University Hospital Chungnam National University college of Medicine Clinical Trials Center Chungnam National University Hospital

AIM To prove that tattooing using indocyanine gre.n(ICG) is feasible in laparoscopic surgery for a colon *** From January 2012 to December 2016, all patients who underwent laparoscopic colonic surgery were retrospectively scre.ned, and 1010 patients with colorectal neoplasms were included. Their lesions were tattooed with ICG the day before the operation. The tattooed group(TG) included 114 patients, and the.non-tattooed group(nTG) was selected by propensity score matching of subjects based on age, sex, tumor staging, and operation method(n = 228). In total, 342 patients were enrolled. Betwe.n the groups, the changes in [Delta(Δ), preoperative-postoperative] the hemoglobin and albumin levels, operation time, hospital stay, oral ingestion period, transfusion, and perioperative complications were compared. ReSULTS Preoperative TG had a shorter operation time(174.76 ± 51.6 min vs 192.63 ± 59.9 min, P nd postoperative oral ingestion period(1.58 ± 0.96 d vs 2.81 ± 1.90 d, P e Δ hemoglobin(0.78 ± 0.76 g/dL vs 2.2 ± 1.18 g/dL, P nd Δ albumin(0.41 ± 0.44 g/dL vs 1.08 ± 0.39 g/dL, P evels were lower in the TG. On comparison of patients in the "n0" and "n1 or n2" groups, the.n0 colon cancer group had a better operation time, length of hospital stay, oral ingestion period, Δ hemoglobin, and Δ albumin results than those of the.n1 or n2 group. The operation methods affected the results, and laparoscopic anterior resection(LAR) showed similar results. However, for left and right hemicolectomy, both groups showed no difference in operation time or hospital *** Preoperative tattooing with ICG is useful for laparoscopic colectomy, especially in the.n0 colon cancer group and LAR.

关键词： Colorectal neoplasm Laparoscopic surgery endoscopic tattoo Indocyanine gre.n Perioperative

A review of carbonates as hydrocarbon source rocks: basic geochemistry and oil–gas generation

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Petroleum Science 2019年第4期16卷 713-728页

作者： Liu-Wen Xia Jian Cao Ming Wang ju-Lei Mi Ting-Ting Wang MOe Key Laboratory of Surficial Geochemistry School of Earth Sciences and EngineeringNanjing UniversityNanjing 210023JiangsuChina Research Institute of experiment and Testing PetroChina Xinjiang Oilfield CompanyKaramay 834000XinjiangChina

Carbonates have be.n known to act as hydrocarbon source rocks, but their basic geochemical and associated hydrocarbon generation characteristics remain not well understood as they occur with argillaceous source rocks in most cases, and the hydrocarbon generation from each rock type is di cult to distinguish, forming one of puzzling issues within the field of petroleum geology and geochemistry. To improve the understanding of this critical issue, this paper reviews recent advances in this field and provides a summary of key areas that can be studied in future. Results show that carbonate source rocks are generally associated with high-salinity environments with low amounts of terrestrial inputs and low dissolved oxygen contents. Petrographically, these source rocks are dark gray or black, fine-grained, stratified, and contain bacterial and algal bioprecursors along with some other impurities. They generally have low organic matter contents, although these can vary significantly in di erent cases(e.g., the total organic carbon contents of marine and lacustrine carbonate source rocks in China are generally 0.1%–1.0% and 0.4%–4.0%, respectively). These rocks contain type I and type II kerogen, me.ning there is a lack of vitrinites. This me.ns that assessment of the maturity of the organic matter in these sediments needs to use.non-traditional techniques rather than vitrinite reflectance. In terms of molecular geochemistry, carbonate source rocks have typical characteristics indicative of generally reducing and saline environments and lower organism-dominated bioprecursors of organic matter, e.g., high contents of sulfur compounds, low Pr/Ph ratios, and dominance of n-alkanes. Most of the carbonate source rocks are typically dominated by D-type organic facies in an oxidized shallow water mass, although high-quality source rocks generally contain A-and B-type organic facies in saline lacustrine and marine-reducing environments, respectively. The hydrocarbon generation mod

关键词： Saline lacustrine source rocks Carbonates Organic facies Hydrocarbon generation

Probabilistic seismic landslide hazard assessment: a case study in Tianshui, northwest China

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Journal of Mountain Science 2020年第1期17卷 173-190页

作者： WAnG Tao LIU Jia-mei SHI ju-song GAO Meng-tan WU Shu-ren Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Active Tectonics and Crustal Stability Assessment Institute of Geomecha nicsCAGSBeijing 100081China China Institute for Geo-enviro nmental Monitoring Beijing 100081China Institute of Geophysics China Earthquake AdministrationBeijing 100081China

Probabilistic analysis in the field of seismic landslide hazard assessment is often based on an estimate of uncertainties of geological, geotechnical,geomorphological and seismological ***, real situations are very complex and thus uncertainties of some parameters such as water content conditions and critical displacement are difficult to describe with accurate mathematical models. In this study, we present a probabilistic methodology based on the probabilistic seismic hazard analysis method and the.newmark’s displacement model. The Tianshui seismic zone(105°00′-106°00′ e, 34°20′-34°40′ n) in the.northeaste.n Tibetan Plateau were used as an example. Arias intensity with three standard probabilities of exceedance(63%, 10%, and 2% in 50 years) in accordance with building design provisions were used to compute.newmark displacements by incorporating the effects of topographic *** scenarios of water content condition were considered and three water content conditions(dry,wet and saturated) were adopted to simulate the effect of pore-water on slope. The influence of 5 cm and 10 cm critical displacements were investigated in order to analyze the sensitivity of critical displacement to the probabilities of earthquake-induced landslide occurrence. The results show that water content in particular, have a great influence on the distribution of high seismic landslide hazard areas. Generally, the dry coverage analysis represents a lower bound for susceptibility and hazard assessment, and the saturated coverage analysis represents an upper bound to some extent. Moreover, high seismic landslide hazard areas are also influenced by the critical displacements. The slope failure probabilities during future earthquakes with critical displacements of 5 cm can increase by a factor of 1.2 to 2.3 as compared to that of 10 cm. It suggests that more efforts are required in order to obtain reasonable threshold values for slope failure. Considering the probab

关键词： Probabilistic analysis Seismic hazard newmark’s method Landslides Displacement model Hazard assessment

The X(4140) and X(4160) resonances in the e^(+)e^(-)→γJ/ψΦ reaction

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Chinese Physics C 2019年第11期43卷 11-20页

作者： en Wang ju-jun Xie Li-Sheng Geng eulogio Oset School of Physics Zhengzhou UniversityZhengzhouHenan 450001 China 2Institute of Mode.n Physics Chinese Academy of SciencesLanzhou 730000 China 3University of Chinese Academy of Sciences Beijing 101408 China 4School of Physics and nuclear energy engineering and Inte.national Research Center for nuclei and Particles in the Cosmos Beihang UniversityBeijing 100191 China 5Departamento de Física Teórica and IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de PaternaAptdo.2208546071 ValenciaSpain

We investigate the J/Ψ? invariant mass distribution in the e^+e^-→γJ/Ψ? reaction at a center-of-mass energy of ■=4.6 GeV measured by the BeSⅢ collaboration,which concluded that no significant signals were observed for e^+e^-→γX(4140) because of the low *** show,however,that the J/Ψ? invariant mass distribution is compatible with the existence of the X(4140) state,appearing as a peak,and a strong cusp structure at the D_s~*■threshold,resulting from the molecular nature of the X(4160) state,which provides a substantial contribution to the *** is consistent with our previous analysis of the B^+→J/Ψ?K^+decay measured by the LHCb *** strongly suggest further measurements of this process with more statistics to clarify the.nature of the X(4140) and X(4160) resonances.

关键词： ΦX(4140) J/ψΦ scattering heavy flavor hadrons X(4160)

Water Supply Changes n and P Conservation in a Pere.nial Grass Leymus chinensis

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Journal of Integrative Plant Biology 2009年第11期51卷 1050-1056页

作者： ju-Ying Huang Hai-Long Yu Ling-Hao Li Zhi-You Yuan Samuel Barrels Center of new Technology Appfication and Research Ningxia University Yinchuan 750021 China State Key Laboratory of Vegetation and environmental Change Institute of Botany the Chinese Academy of Sciences Beijing 100093 China College of Recourses and environment Ningxia University Yinchuan 750021 China Faculty of Forestry and the Forest environment Lakehead University Thunder Bay Ontario P7B 5E1 Canada

Changes in precipitation can influence soil water and nutrient availability, and thus affect plant nutrient conservation strategies. Better understanding of how nutrient conservation changes with variations in water availability is crucial for predicting the potential influence of global climate change on plant nutrient-use strategy. Here, gre.n-leaf nitrogen （n） and phosphorus （P） concentrations, n- and P-resorption proficiency （the terminal n and P concentration in senescent leaves, nRP and PRP, respectively）, and n- and P-resorption efficiency （the proportional n and P withdrawn from senescent leaves prior to abscission, nRe and PRe, respectively） of Leymus chinensis （Trin.） Tzveh, a typical pere.nial grass species in northe.n China, were examined along a water supply gradient to explore how plant nutrient conservation responds to water change. Increasing water supply at low levels （〈 9000 mL/year） increased nRP, PRP and PRe, but decreased gre.n-leaf n concentration. It did not significantly affect gre.n-leaf P concentration or nRe. By contrast, all n and P conservation indicators were.not significantly influenced at high water supply levels （〉 9000 mL/year）. These results indicated that changes in water availability at low levels could affect leaf-level nutrient characteristics, especially for the species in semiarid ecosystems. Therefore, global changes in precipitation may pose effects on plant nutrient economy, and thus on nutrient cycling in the plant-soil systems.

关键词： gre.n-leaf nutrient concentration Leymus chinensis nutrient resorption nutrient conservation water supply gradient.

Fabrication of 3D ordered needle-like polyaniline@hollow carbon nanofibers composites for flexible supercapacitors

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Chinese Chemical Letters 2021年第8期32卷 2448-2452页

作者： Xuepeng ni Yang Jiang Haoyu Chen Kunming Li Huifang Chen Qilin Wu Anqi ju College of Materials Science and engineering&State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China Zhejiang Provincial Key Laboratory of Yarn Material Forming and Composite Processing Technology Jiaxing UniversityShanghai 201620China Key Laboratory of High-Performance Fibers&Products Ministry of EducationDonghua UniversityJiaxing 314001China

Carbon nanofiber-based supercapacitors have broad prospects in powering wearable electronics owing to their high specific capacity,fast charge/discharge process,along with long-cycling ***,a poly(ac rylo n it rile-co-β-methyl hydrogen itaconate) copolymer was prepared and used to synthesize flexible hollow carbon nanofibers(HCnFs) via an electrospinning method without breaking after multiple ***,the inner and outer surfaces of HCnFs were evenly covered with ordered needlelike polyaniline(PAnI) through in-situ polymerization methods to obtain three-dimensional flexible HCnFs/PAnI composites,which exhibited a high capacity 1196.7 F/g at 1 A/g and good cycling stability(90.1% retention at 5 A/g after 3000 cycles).The symmetrical supercapacitor based on the HCnFs/PAnI composites also delive red an outsta nding electrochemical performance with high energy/power density(60.28 Wh/kg at 1000 W/kg) and superior cycling durability(90% capacitance retention after at 5 A/g3000 cycles),which confirmed that the HCnFs/PAnI composites had a wide application potential in flexible energy storage devices.

关键词： Flexible Polyaniline electrospinning Hollow carbon nanofibers Supercapacitors

A 75 kDa glycoprote.n isolated from Cudrania tricuspidata Bureau induces colonic epithelial proliferation and ameliorates mouse colitis induced by dextran sulfate sodium

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Chinese Journal of natural Medicines 2021年第1期19卷 46-55页

作者： Park jeong-Bae Kim Do-Wan Lim Kye-Tack Oh Sejong Lee Sei-jung Department of Pharmaceutical engineering Daegu Haany UniversityGyeongsan 38610South Korea Division of Animal Science Chonnam National UniversityGwangju 61186South Korea

Cudrania tricuspidata Bureau(CTB),a species of the Moraceae plant,has be.n used as a bruise recovery *** study aimed to determine whether the 75 kDa phytoglycoprote.n extracted from CTB has a regulatory effect on the proliferation of human colon epithelial cells and the pathological process of inflammatory bowel disease(IBD).We found that CTB glycoprote.n significantly induces the proliferation of human colon epithelial HT-29 cells by activating prote.n kinase *** glycoprote.n stimulated the phosphorylation of c-jun n-terminal kinase and transcription factor nuclear factor-κB,which are responsible for the expression of cell-cycle-related prote.ns(CDK2,CDK4,cyclin D1 and cyclin e)during its promotion of cell *** colitis was induced in mice by adding dextran sulfate sodium to their drinking water at a concentration of 4%(W/V)for seven *** found that CTB glycoprote.n ameliorates the pathological process of IBD and lowers the disease activity index score,which was composed of body weight change,diarrhea,and hematochezia in ICR mice treated with dextran sulfate ***,we suggest that CTB glycoprote.n has the ability to prevent IBD by promoting cell proliferation signaling events via the activation of PKC,JnK and nF-κB in colon epithelial cells.

关键词： Cell cycle Cell proliferation Colon epithelial cells Cudrania tricuspidata Glycoprote.n Inflammatory bowel disease Prote.n kinase C