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Synthesis of melamine-glucose resin adhesive

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Science China Chemistry 2005年第z1期48卷 29-32页

作者： chen Shuanhu ZHANG Lei Department of Chemistry Northwest University Xi'an 710069 China Department of Chemistry Northwest University Xi'an 710069 China

The synthesis of a novel melamine-glucose adhesive that is similar to urea-formaldehyde adhesive is reported in this paper. The conditions of synthesis, such as the initial pH, the quantity of catalyst, the temperature of reaction, the percentage of each reactant and the time of reaction, were optimized by using the orthogonal experimental method.

关键词： D-glucose, melamine, resin adhesive, orthogonal experimental method.

Fundamental Understanding and Optimization Strategies for Dual‑Ion Batteries:A Review

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Nano-Micro Letters 2023年第8期15卷 205-224页

作者： Chong chen Chun‑Sing Lee Yongbing Tang Advanced Energy Storage Technology Research Center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Center of Super‑Diamond and Advanced Film(COSDAF) City University of Hong KongKowloon 999077Hong KongSARPeople’s Republic of China

There has been increasing demand for high-energy density and longcycle life rechargeable batteries to satisfy the ever-growing requirements for nextgeneration energy storage *** all available candidates,dual-ion batteries(DIBs)have drawn tremendous attention in the past few years from both academic and industrial battery communities because of their fascinating advantages of high working voltage,excellent safety,and environmental ***,the dynamic imbalance between the electrodes and the mismatch of traditional electrolyte systems remain *** fully employ the advantages of DIBs,the overall optimization of anode materials,cathode materials,and compatible electrolyte systems is urgently ***,we review the development history and the reaction mechanisms involved in ***,the optimization strategies toward DIB materials and electrolytes are *** addition,their energy-related applications are also ***,the research challenges and possible development directions of DIBs are outlined.

关键词： Dual-ion batteries Reaction mechanisms Optimization strategies Energy storage

The effects of the synthetic nocistatin on blood vessel activities

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Chinese Science Bulletin 2001年第8期46卷 675-678页

作者： Qiang chen Yong chen Lixiang chen Dingjian Yang Shouliang Dong Rui Wang Lanzhou Univ Sch Life Sci Dept Biochem & Mol Biol Lanzhou 730000 Peoples R China

Nocistatin was synthesized by the solid-phase peptide synthesis method. Its effects on rat systemic arterial pressure; rat hindquarter vascular bed resistance; tension of rabbit pectoral, abdominal, femoral aorta muscle strips without endothelium; and nociceptin induced decreases of rat systemic arterial pressure were determined. The results showed that nocistatin can increase the systemic arterial pressure, increase the hindquarter vascular bed resistance and induce the contraction significantly of abdominal, femoral aorta muscle strips without endotheiium; it has no significant effect on tension of pectoral aorta muscle strips, it cannot antagonize significantly the decrease of rat systemic arterial pressure induced by nociceptin. These results suggest that nocistatin has some important effects on blood vessel activities.

关键词： solid-phase polypeptide synthesis nocistatin nociceptin systemic blood pressure hindquarter vascular bed resistance blood vessel muscle strip.

Influence of double-inlet design on the flow-head characteristics of axial-flow pump

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Journal of Hydrodynamics 2021年第4期33卷 763-772页

作者： Yong-sheng Zhou Hua Zhang Bin chen School of Mechanical Engineering Hefei University of TechnologyHefei230009China College of Hydraulic Science and Engineering Yangzhou UniversityYangzhou225127China School of Environmental Science and Engineering Nanjing University of Information Science and TechnologyNanjing210044China

The internal flow field of an axial-flow pump under low flow rate conditions is extremely turbulent. The unstable flow region is formed due to the tip leakage and the rotating stall, and is distinguished by a saddle patterned zone in its flow-head curve that demonstrates restrictions in its workable flow range. It is therefore important to understand and improve the operational characteristics of an axial-flow pump under low flow rate conditions. In this study, experiments are performed for the performances of an axial-flow pump at the flow rate in a range between 0.8Qd and 1.2Qd, with the internal flow field measured by the particle image velocimetry (PIV), and with the pump performances and the internal flow field simulated by the Ansys CFX. The simulation results agree well with the experimental results. From the predicted heads at the flow rate in the range between 0.1Qd and 0.7Qd by the numerical simulation, the complete flow-head curves are obtained. The streamlines and the velocity contours in the region in front of the impeller leading edge under different flow conditions are analyzed. By adopting the double-inlet structures, the flow-head characteristics are studied by varying the values of δ and σ respectively, where δ denotes the gap between the inner cylinder end and the impeller leading edge, and σ denotes the gap between the inner cylinder and the outer cylinder. The findings indicate that with the double-inlet design, the velocity distribution can be effectively improved in the region in front of the impeller leading edge, as well as the head performance under the low flow rate conditions, and the positive slope value of the head curve is reduced in the unstable flow range. The optimal δ and σ values are determined.

关键词： Double-inlet particle image velocimetry(PIV) tip leakage numerical simulation axial-flow pump

Influence of Isotope on Shell Effects of Pre-scission Particle Evaporation

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Communications in Theoretical Physics 2005年第2X期44卷 343-346页

作者： YE Wei chen Na Department of Physics Southeast University Nanjing 210096 China Department of Applied Mathematics Nanjing University of Finance & Economics Nanjing 210003 China

The shell effects on the particle evaporation prior to fission for three Pb isotopes, ^204Pb, ^208Pb, and ^212pb,as well as three Sn isotopes, ^128Sn, ^132Sn, and ^136Sn, are explored by a diffusion model. Calculations show that the magnitude of shell effects in the emission of particles changes with the neutron-to-proton ratio N/Z of these fissioning nuclei, and this change is affected significantly by the spin and excitation energy of the system. It is shown that high angular momentum enhances the dependence of shell effects on the N/Z while high excitation energy weakens such a dependence.

关键词： isotopic effect shell effect pre-scission particle emission Smoluchowski equation

A Note on Schwarz-Pick Estimate

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Chinese Annals of Mathematics,Series B 2010年第3期31卷 343-346页

作者： Yang LIU Zhihua chen Department of Mathematics Zhejiang Normal University Jinhua 321004 Zhejiang China. Department of Mathematics Tongji University Shanghai 200092 China

A Schwarz-Pick estimate of higher order derivative for holomorphic functions with positive real part on Bn is presented. This improves the earlier work on Schwarz-Pick estimate of higher order derivatives for holomorp... 详细信息

关键词： Schwarz-Pick estimate Holomorphic function Taylor expansion

Reprogramming of hormone-mediated antiviral responses in plants by viruses:A molecular tug of war on the salicylic acid-mediated immunity

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Molecular Plant 2023年第10期16卷 1493-1495页

作者： Faisal Islam Shan Liu Huan chen Jian chen International Genome Center Jiangsu UniversityZhenjiang 212013China Joint Center for Single Cell Biology School of Agriculture and BiologyShanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China

Plants are consistently exposed to pathogens throughout theirlife cycle and have developed sophisticated and effective regulatory mechanisms to protect themselves against ***,as obligate pathogens,can trigger numerous pathological changes and cause systemic damages that impact all aspects of plant life through encoded viral proteins,conceptuallyconsidered as"effectors."

关键词： programming cycle immunity

Numerical study of axial-loaded circular concrete-filled aluminum tubular slender columns

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Frontiers of Structural and Civil Engineering 2024年第2期18卷 272-293页

作者： Xudong chen Jeung-Hwan DOH Sanam AGHDAMY School of Engineering and Built Environment Griffith University Gold Coast CampusBrisbaneQLD 4222Australia

Aluminum alloys have been widely applied in coastal and marine structures because of their superior sustainability and corrosion ***-filled double-skin aluminum tubular columns(CFDAT)possess higher strength and better ductility than traditional reinforced concrete ***,few studies have been conducted on numerical simulation methods for circular ***,there has been no experimental or numerical study on intermediate-to-slender circular ***,a comprehensive numerical study was conducted on a modeling method for the first time to simulate the axial behavior of a slender circular *** study outlines the development of numerical modeling techniques and presents a series of comparative studies using various material nonlinearities,confinement effects,and nonlinearity of the initial geometric imperfections for a slender *** numerical results were compared with more than 80 previously available stub and slender experimental test results for *** was confirmed that the proposed numerical technique was reliable and accurate for simulating the axial behavior of intermediate and slender circular ***,a parametric study was conducted to investigate the effects of geometric and material properties on the axial capacity of the ***,the slenderness and strength-to-width ratio of CFDAT were compared with those of concrete-filled double-skin steel tubular columns(CFDST).The simulated axial strengths were compared with those predicted using AS 5100 and AISC *** design equations for the CFDATs should be proposed based on AS 5100.

关键词： axial behavior aluminum concrete-filled double-skin slender columns numerical modelling

Role of N/Z in Pre-scission Neutrons as an Observable of Nuclear Friction

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Communications in Theoretical Physics 2009年第8期52卷 329-332页

作者： chen Na YE Wei School of Applied Mathematics Nanjing University of Finance and Economics Nanjing 210046 China Department of Physics Southeast University Nanjing 210096 China

A dynamical Langevin model is employed to evaluate the excess of the neutron emission in the fission ofheavy nuclei ^(240)Cf,^(246)Cf,^(254)Cf,^(240)U relative to the standard statistical-model prediction at various saddle-to-scissionfriction *** is shown that when the neutron-to-proton ratio N/Z of the system increases,the sensitivityof the excess to the friction decreases substantially,and it almost disappears for ^(240)*** suggest that using thosecompound systems with low N/Z favors an accurate determination for the saddle-to-scission friction strength based onthe measurement of the pre-scission neutron multiplicity.

关键词： pre-scission neutron multiplicity N/Z effect nuclear friction Langevin model