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Synergistically constructed lamination-like network of redox-active polyimide and MXene via π-π interactions for aqueous NH_(4)^(+) storage

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Chinese Journal of Chemical Engineering 2024年第7期71卷 217-224页

作者： jing He Hongye Xuan jing Jin Ke Yu Changyao Liyang Lintong Hu Minjie Shi Chao yan School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Jiangsu New yangzi Shipbuilding Co. LtdJingjiang 214532China

As a nonmetallic charge carrier,ammonium ion(NH_(4)^(+))has garnered significant attention in the construction of aqueous batteries due to its advantages of low molar mass,small hydration size and rapid diffusion in aqueous *** are a kind of potential electro-active materials for aqueous NH_(4)^(+)***,traditional polymer electrodes are typically created by covering the bulky collectors with excessive additives,which could lead to low volume capacity and unsatisfactory ***,a nanoparticle-like polyimide(PI)was synthesized and then combined with MXene nanosheets to synergistically construct an additive-free and self-standing PI@MXene composite ***,the redox-active PI nanoparticles are enclosed between conductive MXene flakes to create a 3D lamination-like network that promotes electron transmission,while theπ-πinteractions existing between PI and MXene contribute to the enhanced structural integrity and stability within the composite *** such,it delivers superior aqueous NH_(4)^(+)storage behaviors in terms of a notable specific capacity of 110.7 mA·h·cm^(–3) and a long lifespan with only 0.0064%drop each ***,in-situ Raman and UV–Vis examinations provide evidence of reversible and stable redox mechanism of the PI@MXene composite electrode during NH_(4)^(+)uptake/removal,highlighting its significance in the area of electrochemical energy storage.

关键词： Synergetic coupling Composite materials Polyimide Energy storage Aqueous ammonium ion batteries

Synthesis and anti-tumor activity of all-trans retinoic acid derivatives

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Chinese Chemical Letters 2009年第7期20卷 809-811页

作者： Juan Shen jing Bo Shi Fei Hu Chen Yuan Wang jing jing Ruan yan Huang School of Pharmacy Anhui Medical University Hefei 230032 China Key Laboratory of Gene Resource Utilization for Severe Disease Antiinflammatory and lmmunopharmacology Ministry of Education and Anhui Province Anhui Medical University Hefei 230032 China

A series of retinoate and retinamide derivatives were designed, synthesized, and their anti-tumor activities were investigated in NB4 by MTT and flow cytometry assays （FCM）. All compounds showed cytotoxicity, especially compounds la and ld exhibited a higher cytotoxicity than other derivatives and all-trans rethaoic acid （ATRA）. Furthermore, compound 1d could induce NB4 cell lines differentiation efficiently. O 2009 Fei Hu Chert. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： All-trans retinoic acid Synthesis Cell differentiation NB4 cell lines

A Characterization of Almost Simple K_3-groups

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Acta Mathematica Sinica,English Series 2015年第11期31卷 1739-1750页

作者： yan Xiong yan Hai jing XU Gui Yun CHEN School of Mathematics and Statistics Southwest University Faculty of Education Southwest University

It is a well-known fact that characters of a finite group can give important information about the group＇s structure. Also it was proved by the third author of this article that a finite simple group can be uniquely determined by its character table. Here the authors attempt to investigate how to characterize a finite almost simple group by using less information of its character table, and successfully characterize the almost simple K3-groups by their orders and at most three irreducible character degrees of their character tables.

关键词： Finite group irreducible character character degree simple group

Effects of ZrO_2 Nanoparticles on the Microstructure and Thermal-protective Properties of PEO Coating on Al-12.5%Si Alloy

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Journal of Wuhan University of Technology(Materials Science) 2019年第1期34卷 156-164页

作者： WANG Ping HAN jing yan Junheng WANG Jiandong Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices School of Materials and Chemical Engineering Xi'an Technological University QuFu JinHuang Piston Corporation Limited Xi'an Military Representative Office PLA

PEO ceramic coatings including ZrO_2-Al_2O_3-SiO_2 in three phases were prepared on an Al-12.5%Si alloy in electrolyte solutions containing ZrO_2 nanoparticles. The microstructures and phases of the coatings were analyzed by SEM and XRD, and the heat insulation performance and the thermal shock resistance of the coatings were investigated. The compactness of the coating increased significantly and the hindrance of the Si element on plasma electrolytic oxidation process was effectively weakened. The growth rate of the coating was improved substantially with the addition of ZrO_2 nanoparticles. The PEO ceramic coatings are primarily composed of SiO_2 and high temperature steady phases such as a-Al_2O_3 and c-ZrO_2. Both the content of c-ZrO_2 and the heat-insulating property of the coating increased significantly. The ceramic coatings with special microstructure and composition formed in the solutions containing ZrO_2 nanoparticles possess excellent heat insulation performance and thermal shock resistance.

关键词： Al-12.5%Si alloy modified plasma electrolytic oxidation ZrO2 nanoparticles heat-insulating properties thermal shock resistance

RXTE /ASM and Swift /BAT observations of spectral transitions in bright X-ray binaries in 2005-2010

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Research in Astronomy and Astrophysics 2011年第4期11卷 434-444页

作者： jing Tang Wen-Fei Yu Zhen yan Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Shanghai 200030 China

We have studied X-ray spectral state transitions that can be seen in the long- term monitoring light curves of bright X-ray binaries from the All-Sky Monitor （ASM） onboard the Rossi X-ray Timing Explorer （RXTE） and the Burst Alert Telescope （BAT） onboard Swift during a period of five years from 2005 to 2010. We have applied a program to automatically identify the hard-to-soft （H-S） spectral state transitions in the bright X-ray binaries monitored by the ASM and the BAT. In total, we identified 128 hard-to-soft transitions, of which 59 occurred after 2008. We also determined the transition fluxes and the peak fluxes of the following soft states, updated the measurements of the luminosity corresponding to the H-S transition and the peak luminosity of the following soft state in about 30 bright persistent and transient black hole and neutron star binaries following Yu ＆yan, and found the luminosity correlation and the luminosity range of spectral transitions in data between 2008-2010 are about the same as those derived from data before 2008. This further strengthens the idea that the luminosity at which the H-S spectral transition occurs in the Galactic X-ray binaries is determined by non-stationary accretion parameters such as the rate-of-change of the mass accretion rate rather than the mass accretion rate itself. The correlation is also found to hold in data of individual sources 4U 1608-52 and 4U 1636-53.

关键词： X-rays binaries -- stars neutron -- black hole physics

Significance and relationship between Cripto-1 and p-STAT3 expression in gastric cancer and precancerous lesions

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World Journal of Gastroenterology 2010年第5期16卷 571-577页

作者： Zhang, Jian-Guo Zhao, jing Xin, yan China Med Univ Affiliated Hosp 1 Gen Surg Inst Dept Tumor PatholCanc InstLab 4 Shenyang 110001 Liaoning Prov Peoples R China

AIM:To explore the relationship between Cripto-1 (CR-1) and tyrosine phosphorylation STAT3 (p-STAT3) expressions in gastric cancer (GC) and gastric carcinogensis and ***: The PV9000 immunohistochemical method was used to detect the expression of CR-1 and p-STAT3 in 178 cases of GC, 95 matched normal gastric mucosa, 40 chronic atrophic gastritis (CAG), 48 intestinal meta-plasia (IM) and 25 dysplasia (DYS). RESULTS: The positive rates of CR-1 and p-STAT3 expression were significantly higher in CAG (65.0% and 60.0%), in IM (83.3% and 77.1%), DYS (80.0% and 68%) and GC (71.3% and 60.1%) than in normal gastric mucosa (43.2% and 41.1%, P < 0.05), respectively. The expressions of CR-1 and p-STAT3 (78.3% and 66.7%) were signifi cantly higher in GC with lymphnode metastasis than in those without metastasis (53.1% and 42.9%, P < 0.05). CR-1 expression was also related to histological and Lauren's types of GC (P < 0.001). Furthermore, there was positive relation-ship between CR-1 and p-STAT3 expressions in GC (rk = 0.189, P = 0.002).CONCLUSION: The up-regulation of CR-1 and p-STAT3 may play important roles in gastric carcinogenesis and lymph node metastasis. CR-1 and p-STAT3 expression in GC was positively correlated, and the relevant molecular mechanism requires further investigations.

关键词： Cripto-1 Phosphorylation STAT3 Gastric cancer Precancerous lesions Immunohistochemistry

Temperature-dependent of Nonlinear Optical Conductance of Graphene-based Systems in High-intensity Terahertz Field

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Nano-Micro Letters 2014年第2期6卷 153-162页

作者： jing Lv Rui-yang Yuan Hui yan Laboratory of Thin Film Materials Beijing University of Technology Center of Theoretical Physics Department of PhysicsCapital Normal University

For multi-photon processed with the linear dispersion in the high-intensity terahertz(THz) field,we have systematically investigated the temperature-dependent nonlinear optical response of graphene-based systems, including single layer graphene, graphene superlattice and gapped graphene. In the intrinsic single layer graphene system, it demonstrates that, at low temperature, nonlinear optical conductivities of the thirdand fifth-order are respectively five and ten orders of magnitude larger than the universal conductivity with high-intensity and low frequency THz *** the graphene superlattice and gapped graphene systems, the optical responses enhanced because of the anisotropic massless and massive Dirac fermions.

关键词： Nonlinear Graphene Terahertz Conductance Transmittance

Hydrothermal Synthesis and Structure Analysis of a Chromium Complex [Cr(aea)]_2(OH)_2(aea =N-(2-Aminoethyl)aspartate)

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Chinese Journal of Structural Chemistry 2008年第2期27卷 225-229页

作者： DANG Dong-Bin JIN Ya-Nan BAI yan PAN Xiao-jing WANG jing-Ping Institute of Molecular and Crystal Engineering School of Chemistryand Chemical Engineering Henan University Kaifeng 475001 China

A dimeric chromium compound has been synthesized by hydrothermal method and characterized by IR, EPR spectra and TG-DTA technique. The title compound [Cr（aea）]2（OH）2 （aea = N-（2-aminoethyl）aspartate） crystallizes in monoclinic, space group P21/c with a = 8.9393（10）, b = 6.7198（7）, c = 14.6791（16） A, β = 91.0580（10）°, V= 881.63（17） A3, Z= 2, Mr = 486.34, De= 1.832 g/cm3, F（000） = 500,μ = 1.296 mm-1, R = 0.0271 and wR = 0.0756. Single-crystal X-ray structural analysis indicates that the title compound consists of two Cr（aea） units linked by two bridging hydroxyl groups. The geometry around each chromium center is approximately octahedral and completed by two hydroxyls and a quadridentate ligand which is formed when ethylenediamine reacts with maleic acid.

关键词： chromium compound hydrothermal synthesis crystal structure

Nonlocal Symmetries and Conservation Laws of Nonlocal Camassa-Holm Type Equations

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Acta Mathematicae Applicatae Sinica 2015年第4期31卷 909-920页

作者： Zhen-hua SHI jing KANG Lu yan Department of Mathematics Northwest University Center for Nonlinear Studies Northwest University Xingzhi College Xi'an University of Finance and Economics

The two-component μ-Camassa-Holm equation, the μ-Camassa-Holm equation and the modified μ- Camassa-Holm equation are three nonlocal integrable models. In this paper, it is shown that the two-component μ-Camassa-Holm equation and the μ-Camassa-Holm equation with a linear dispersion admit a kind of nonlocal symmetries, and the modified μ-Camassa-Holm equation does not have such kind of nonlocal symmetry. An number of conservation laws to the modified μ-Camassa-Holm equation and μ-Camassa-Holm equation are obtained.

关键词： Nonlocal symmetry conservation law the two-component μ-Camassa-Holm equation the modi-fied μ-Camassa-Holm equation the μ-Camassa-Holm equation