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Co-transport of dissolved organic matter and heavy metals in soils induced by excessive phosphorus applications

Journal of Environmental Sciences 2010年第4期22卷 598-606页

作者： Mingkui zhang huimin zhang Department of Natural Resource Science College of Natural Resource and Environmental Sciences Zhejiang University Hangzhou 310029 China. Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition Hangzhou 310029 China

To evaluate the effects of long-term applications of phosphorus fertilizers on mobility of dissolved organic matter （DOM） and heavy metals in agricultural soils, a sandy soil and a loamy soil were spiked with ammonium phosphate at application rates of 0, 25, 50, 100, 250, and 500 mg P per kilogram of soil. A series of 15-cm long soil columns were constructed by packing incubated soils of varying concentrations of P. The soil columns were consecutively leached by simulated rainfalls for six cycles. The contents of water extractable organic carbon in both sandy and loamy soils increased significantly with increasing rates of P applications. Relatively high rates of P applications could induce a marked increase in DOM concentrations in the leachates, the effects were larger with the sandy soil rather than with the loamy soil. Applications of P changed the partitioning of trace metals in the soil solids and the soil solutions. The increased P application rates also seemed to elevate the leaching of Cu, Cd, and Zn from soils. The concentrations of Cu, Cd, and Zn in the leachates were positively correlated with DOM, probably due to the formation of metal-DOM complexes. In contrast, Pb concentrations in the leachates were negatively correlated with DOM, and decreased with increasing rates of P applications. The boosted leaching of DOM induced by high rates of P applications was probably due to the added phosphate ions competing for adsorption sites in the soil solids with the indigenous DOM.

关键词： dissolved organic matter heavy metals phosphorus fertilizer leaching

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A three-parameter single-step time integration method for structural dynamic analysis

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Acta Mechanica Sinica 2019年第1期35卷 112-128,I0004页

作者： huimin zhang Yufeng Xing Institute of Solid Mechanics Beihang University (BUAA)Beijing 100083China

The existing three-parameter single-step time integration methods, such as the Generalized-a method, improve numerical dissipation by modifying equilibrium equation at time points, which cause them to lose accuracy due to the interpolation of load vectors. Moreover, these three-parameter methods do not present an available formulation applied to a general secondorder non linear differential equatio n. To solve these problems, this paper proposes an innovative three-parameter single-step method by introducing an additional variable into update equations. Although the present method is spectrally identical to the Generalized-cx method for undamped systems, it possesses higher accuracy since it strictly satisfies the equilibrium equation at time points, and can be readily used to solve nonlinear equations. By the analysis of accuracy, stability, numerical dissipation and dispersion, the optimal second-order implicit and explicit schemes are generated, which can maximize low-frequency accuracy when high-frequency dissipation is specified. To check the performance of the proposed method, several numerical experiments are conducted and the proposed method is compared with a few up-to-date methods.

关键词： Three-parameter Single-step Optimal scheme Higher accuracy

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长链非编码RNA核富集转录本1对瘢痕成纤维细胞增殖、凋亡和迁移的影响

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中国组织工程研究 2025年第2期29卷 347-354页

作者：张彦峰张慧敏何翔郑屿萍上海中医药大学附属曙光医院皮肤科上海市201203

背景:已有研究阐明核富集转录本1(nuclear enriched abundant transcript 1,NEAT1)下调抑制了瘢痕成纤维细胞的进展,但具体机制尚不完全清楚。目的:探讨长链非编码RNA NEAT1调节miR-136-5p/泛素特异性蛋白酶4(ubiquitin specific protease 4,USP4)轴对瘢痕成纤维细胞生物学行为的影响。方法:将瘢痕成纤维细胞分为5组:si-NC组、空白对照组、si-NEAT1组、si-NEAT1+miR-136-5p inhibitor组、si-NEAT1+inhibitor-NC组,qRT-PCR检测NEAT1、miR-136-5p表达;CCK-8法及EDU染色检测细胞增殖能力;流式细胞术检测细胞凋亡情况;划痕愈合实验检测细胞迁移情况;Western blot检测USP4、p27、Bax、基质金属蛋白酶9、α-平滑肌肌动蛋白、Ⅰ型胶原蛋白α1链蛋白表达;双荧光素酶实验检测NEAT1与miR-136-5p、miR-136-5p与USP4的关系。结果与结论:①与si-NC组比较,si-NEAT1组NEAT1表达、A450值、EDU阳性细胞百分比、划痕愈合率以及USP4、基质金属蛋白酶9、α-平滑肌肌动蛋白、Ⅰ型胶原蛋白α1链蛋白表达降低(P<0.05),miR-136-5p表达、细胞凋亡率及p27、Bax蛋白表达升高(P<0.05);②miR-136-5p inhibitor逆转了沉默NEAT1对瘢痕成纤维细胞生物学行为的影响;③miR-136-5p与NEAT1、miR-136-5p与USP4存在靶向调控关系。结果表明,沉默NEAT1可能通过调控miR-136-5p/USP4轴抑制瘢痕成纤维细胞的增殖和迁移,诱导其凋亡。

关键词：长链非编码RNA核富集转录本1 miR-136-5p 泛素特异性蛋白酶4 瘢痕成纤维细胞增殖

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A Comparison Study of Sinterability and Electrical Properties for Microwave and Conventional Sintered Mn_(0.43)Ni_(0.9)CuFe_(0.67)O_4 Ceramics

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Journal of Materials Science & Technology 2010年第4期26卷 344-350页

作者： Xianjing Jin Aimin Chang huimin zhang Dongyan zhang Xinjiang Key Laboratory of Electronic Information Materials and Devices Xinjiang Technical Institute of Physics and Chemistry CAS Urumqi 830011 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

In this paper, a quaternary system of Mn0.43Ni0.9CuFe0.67O4 negative temperature coefficient （NTC） thermistor ceramic prepared by solid/solid reaction was sintered by microwave and conventional method, respectively. To characterize the sinterability of the samples, the densification parameter, porosity and grain size distribution of the bulk were determined. The crystal structure, phase compositions, morphology and impedance of the samples were analyzed by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, energy-dispersive spectroscopy （EDS） and impedance analysis. The experimental results confirmed that the sinterability and electrical properties of ceramics were homogenously improved by microwave sintering.

关键词： Microwave sintering Mn0.43Ni0.9CuFe0.67O4 Sinterability Electrical Negative temperature coefficient (NTC)

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Variation Character of Grain Yield per Unit Area in Main Grain-producing Area of Northeast China

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Chinese Geographical Science 2007年第2期17卷 110-116页

作者： CHENG Yeqing zhang Pingyu zhang huimin Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130012 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Based on the surveys and the statistic data during 1980-2003, the variation character of grain yield per unit area in Northeast China and its main factors have been discussed by the methods of statistics and grey correlation analysis. The results show that: 1) the grain yield per unit area has been taking on an increasing trend in the recent 20 years. It increased from 2519.80kg/ha in 1980 to 4216.11kg/ha in 2003, with an increasing rate of 67.32%; 2) the variation of grain yield per unit area is considerably prominent and its range is also very great, with the maximal increase rate of 42.59% and maximal decrease rate of 21.13%, respectively, which are far above the whole Chinese average level; 3) the variation of main crops' yield per unit area is remarkable, which takes on the character that the yield of corn is much higher than that of soybean and rice; and 4) the grey correlation analysis shows that the most important factors impacting the variation of grain yield per unit area are the total power of agricultural machinery, the consumption of chemical fertilizer and effective irrigated area. However, the influence of natural disaster and income level should not be ignored. Effective ways to improve grain yield per unit area are to construct farmland improvement groundwork, reclaim the middle- and low-yield farmland, etc.

关键词： grain yield per unit area grey correlation analysis Northeast China main grain-producing area

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NKT cells in liver diseases

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Frontiers of Medicine 2018年第3期12卷 249-261页

作者： Shasha Zhu huimin zhang Li Bai CAS Key Laboratory of Innate Immunity and Chronic Disease CAS Center for Excellence in Molecular Cell Science School of Life Sciences and Medical Center University of Science and Technology of China Hefei 230027 China Innovation Center for Cell Signaling Network Hefei National Laboratory for Physical Sciences at Microscale Hefei 230027 China

Natural killer T cells are innate-like and tissue-resident lymphocytes, which recognize lipid antigens and are enriched in the liver. Natural killer T cells play important roles in infections, tumors, autoimmune diseases, and metabolic diseases. In this study, we summarize recent findings on biology of natural killer T cells and their roles in hepatitis B virus and hepatitis C virus infection, autoimmune liver diseases, alcoholic liver disease, nonalcoholic fatty liver disease, and hepatocellular carcinoma. Controversial results from previous studies are discussed, and indicate the dynamic alteration in the role of natural killer T cells during the progression of liver diseases, which might be caused by changes in natural killer T subsets, factors skewing cytokine responses, and intercellular crosstalk between natural killer T cells and CDld-expressing cells or bystander cells.

关键词： natural killer T cells hepatitis B virus and hepatitis C virus infection autoimmune liver diseases alcoholic liverdisease nonalcoholic fatty liver disease hepatocellular carcinoma

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Decomposition Analysis on Direct Material Input and Dematerialization of Mining Cities in Northeast China

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Chinese Geographical Science 2009年第2期19卷 104-112页

作者： QIU Fangdao TONG Lianjun zhang huimin zhang Na School of Urban and Environmental Sciences Xuzhou Normal University Xuzhou 221116 China College of Urban and Environment Science Northeast Normal University Changchun 130024 China Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changehun 130012 China

Material dematerialization is a basic approach to reduce the pressure on the resources and environment and to realize the sustainable development. The material flow analysis and decomposition method are used to calculate the direct material input (DMI) of 14 typical mining cities in Northeast China in 1995–2004 and to analyze the demateri- alization and its driving factors in the different types of mining cities oriented by coal, petroleum, metallurgy and multi-resources. The results are as follows: 1) from 1995 to 2006, the increase rates of the DMI and the material input intensity of mining cities declined following the order of multi-resources, metallurgy, coal, and petroleum cities, and the material utilizing efficiency did following the order of petroleum, coal, metallurgy, and multi-resources cities; 2) during the research period, all the kinds of mining cities were in the situation of weak sustainable development in most years; 3) the pressure on resources and environment in the multi-resources cities was the most serious; 4) the petro- leum cities showed the strong trend of sustainable development; and 5) in recent years, the driving function of eco- nomic development for material consuming has continuously strengthened and the controlling function of material utilizing efficiency for it has weakened. The key approaches to promote the development of circular economy of min- ing cities in Northeast China are put forward in the following aspects: 1) to strengthen the research and development of the technique of resources’ cycling utilization, 2) to improve the utilizing efficiency of resources, and 3) to carry out the auditing system of resources utilization.

关键词： direct material input material flow analysis dematerialization decomposition method mining cities Northeast China

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Supplier Encroachment and Quality Disclosure Strategy in an E-supply Chain with Blockchain Technology

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Journal of Systems Science and Systems Engineering 2024年第6期33卷 682-715页

作者： huimin zhang Zhenkai Lou Yan Yan Fujun Hou School of Management and Economics Beijing Institute of TechnologyBeijing100081China School of Management Science and Engineering Anhui University of TechnologyMaanshan243032China

This paper explores quality disclosure strategy in an e-supply chain including a supplier and an e-retailer driven by blockchain technology(BT),wherein the supplier possesses private quality information and has the option to encroach on the end *** investigate the no-encroachment and encroachment scenarios under the three quality disclosure strategies(i.e.,non-disclosure strategy,voluntary disclosure strategy and BT-supported disclosure strategy).The impact of supplier encroachment and firms’preference for disclosure strategies are *** analysis shows that regardless of the strategy chosen,encroachment always benefits the supplier but,under certain conditions,benefits the ***,with no-encroachment,both the supplier and the e-retailer have the same preference for disclosure *** encroachment,however,the supplier prefers the voluntary disclosure strategy when both the quality variability and direct selling cost are small,and BT’s operation cost is relatively large;otherwise,he prefers the BT-supported disclosure *** the e-retailer,she always prefers both the voluntary and BT-supported disclosure ***,it is observed that the BT-supported disclosure strategy emerges as optimal for both the supplier and the e-retailer when faced with significant quality variability,regardless of *** and adopting BT can generate more consumer surplus under certain ***,we extend the basic model by considering simultaneous quantity decision and find that keying findings are ***,management insights are covered and given.

关键词： Supply chain management encroachment blockchain technology quality disclosure

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Antiferromagnetic second-order topological insulator with fractional mass-kink

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npj Computational Materials 2022年第1期8卷 788-794页

作者： Haimen Mu Gan Zhao huimin zhang Zhengfei Wang Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Strongly-Coupled Quantum Matter PhysicsDepartment of PhysicsUniversity of Science and Technology of ChinaHefeiAnhui230026China Key Laboratory of Material Modification by Laser Ion and Electron BeamsDalian University of TechnologyMinistry of EducationDalian116024China

Generally,the topological corner state in two-dimensional(2D)second-order topological insulator(SOTI)is equivalent to the well-known domain wall state,which is originated from the mass-inversion between two adjacent edges with phase shift ofπ.In this work,go beyond this conventional physical picture,we report a fractional mass-kink induced 2D SOTI in monolayer FeSe with canted checkerboard antiferromagnetic(AFM)order by analytic model and first-principles *** canted spin associated in-plane Zeeman field can gap out the quantum spin Hall edge state of FeSe,forming a fractional mass-kink with phase shift ofπ/2 at the rectangular corner,and generating an in-gap topological corner state with fractional charge of e/***,the topological corner state is robust to a finite perturbation,existing in both naturally and non-naturally cleaved corners,regardless of the edge *** results not only demonstrate a material system to realize the unique 2D AFM SOTI,but also pave a way to design the higher-order topological states from fractional mass-kink with arbitrary phase shift.

关键词： topological fractional insulator

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Challenges of iNKT cell-based antitumor immunotherapies

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Cellular & Molecular Immunology 2021年第4期18卷 1077-1078页

作者： huimin zhang Li Bai Hefei National Laboratory for Physical Sciences at Microscale the CAS Key Laboratory of Innate Immunity and Chronic DiseaseSchool of Life SciencesDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiChina

Invariant natural killer T(iNKT)cells are good candidates for antitumor immunotherapies due to their functional advantages and low *** promising utility has been exhibited by studies in animal models and clinical ***,... 详细信息

关键词： functional Invariant NKT

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