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Martensitic transformation and magnetic properties in Mn_(49-x)Cu_(x)Ni_(41)Sn_(10)(x=0-2)

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Rare Metals 2023年第7期42卷 2433-2438页

作者： Meng-Zhe Zhao Hong-Mei Qiu Ze-Ya Zhu Yun-li Xu Zhu-Hong liu li-Qing pan Department of Applied Physics University of Science and Technology BeijingBeijing100083China College of Science China Three Gorges UniversityYichang443002China

The crystal structure,phase transition,metamagnetic behavior and magnetic entropy change(ΔS_(M))of the Mn_(49-x)Cu_(x)Ni_(41)Sn_(10)(x=0-2)alloys were systematically *** results of experiment about crystal structure confirm that Mr_(49-x)Cu_(x)Ni_(41)Sn_(10)alloys have a highly ordered cubic L2_(1)Heusler *** Cu element improving,all samples have a martensitic transformation and inverse martensitic transformation by analyzing the result of magnetic *** saturation magnetization of samples decreases gradually,the martensitic transformation temperature(T_(M))of as-annealed samples increases to a high-temperature area,and the Curie temperature(T_(C))of samples moves to a low-temperature area with the content of Cu element increasing from x=0 to x=*** positive values of magnetic entropy change(ΔS_(M))of all alloys were investigated near the martensitic *** the applied magnetic field is 3 T,a worthwhile value ofΔS_(M)can reach up to 32.0 J·kg^(-1)·K^(-1)in Mn_(47)Cu_(2)Ni_(41)Sn_(10)alloy.

关键词： Heusler alloys Arc melting X-ray diffraction Magnetic properties

Development of the Embedded Protective Device Based on ARM

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Journal of China University of Mining and Technology 2005年第4期15卷 344-347页

作者： liU Xiao-wen li Na pan Chun-de School of Information ＆ Electrical Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

An embedded protective device for 35kV power line is worked out based on Philips’ LPC2292 ARM MCU. Several aspects such as embedded design technique adopted in the system framework, application of adaptive theory in data acquisition, Board Support Packet (BSP) developing and task dispatching related to operating system are discussed. Both hardware and software framework of the system are given. Advanced hardware platform and software development environment is applied in design of the system, with the advanced co-design technology.

关键词： microcomputer protective device ARM embedded operating system adaptive theory BSP

Electronic Properties of Boron Nanotubes under Uniaxial Strain: a DFT study

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Chinese Physics Letters 2011年第8期28卷 250-253页

作者： pan li-Jun JIA Yu SUN Qiang HU Xing School for Physics and Engineering Zhengzhou UniversityZhengzhou 450052 Laboratory for Clean Energy and Quantum Structures Zhengzhou UniversityZhengzhou 450052 Department of Physics Zhengzhou Normal UniversityZhengzhou 450044

Electronic structures of a uniaxially stretched boron nanotube(BNT)are studied by the density functional theory(DFT)and compared with a zigzag single-walled carbon nanotube(CNT).It is verified that modifications of the electronic band structures of CNTs may be classified into three patterns depending on their helicity under the applied strain up to 20%.However,for the BNT,the partial boron bonds will be broken as the applied strain is more than 10%,indicating its poor deformation ability as compated with ***,the band gap of the BNT keeps or converts to zero regardless of its chirality as the applied strain increases,which is drastically distinct from the *** special behavior of the BNT implies a potential application as an excellent stress sensor.

关键词： Uniaxial boron strain

Effect of Fe and Cu on Electrochemical Characteristics of Low-Co AB5 Type Alloys

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Journal of Rare Earths 2004年第z1期22卷 245-248页

作者： Zhu Xilin Zhou Yu Chong Fayao li Xiaochun pan Weilin Inner Mongolia Rare Earth Ovonic Metal Hydride Co. Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic Metal Hydride Co.Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic Metal Hydride Co.Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic Metal Hydride Co.Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic Metal Hydride Co.Ltd.Baotou 014030 China

In order to further reduce the cost of AB5 type rare earth-based hydrogen storage alloy, a low-Co AB5 type hydrogen storage alloy were by substituting Co with Cu and *** characteristics of these alloys have been investigated by means of XRD, PCT, and measurement of electrochemical capacity and cycle *** test results show that the effect of these two kinds of substituting elements on discharge capacity is Cu ＞ Fe, and the cycle life is on the *** of them have no distinct influence on activity speed, but activity speed increases with the decrease of *** the order way, the high discharge rate characteristics rise with the addition of Cu and decreasing of Co.

关键词： Cu and Fe low-Co AB5 type hydrogen storage alloy electrochemical capacity cycle life

Identification and Expression Analysis of the Phosphoenolpyruvate Carboxylase Gene Family in Peanut (Arachis hypogaea L.)

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Agricultural Sciences in China 2010年第4期9卷 477-487页

作者： YU Shan-lin pan li-juan YANG Qing-li CHEN Ming-na ZHANG Hong-sheng State Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural University Nanjing 210095 P.R.China Shandong Peanut Research Institute Qingdao 266100 P.R.China

Phosphoenolpyruvate carboxylase （PEPC） is widely distributed in plants and bacteria, and catalyzes the carboxylation of phosphoenolpyruvate to form oxaloacetate and inorganic phosphate. To investigate the molecular mechanisms of the regulation and control of peanut oil, with the degenerated primers and RACE-PCR approach, five PEPC genes were cloned from peanut, and designated as AhPEPC1, AhPEPC2, AhPEPC3, AhPEPC4, and AhPEPC5, respectively. The structure and phylogenetic analysis of PEPC protein indicated that AhPEPC1-4 genes encoded a typical plant-type PEPC-enzyme, and AhPEPC5 a bacterial-type. By real-time quantitative RT-PCR approach the expression pattern of each gene was detected in various tissues of normal and high oil-content peanut varieties. It was found that there was a lower expression level of AhPEPCs genes except for the AhPEPC2 in high-oil peanut than normal-oil peanut line. The results provide some fundamental information for the further investigation of plant PEPC proteins and their role in regulation of oil-content in peanut seeds.

关键词： peanut phosphoenolpyruvate carboxylase gene cloning expression pattern regulation of oil-content

Effect of sorbed and desorbed Zn(Ⅱ) on the growth of a green alga (Chlorella pyrenoidosa)

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Journal of Environmental Sciences 2007年第9期19卷 1028-1031页

作者： CHANG Guo-hua CHEN Hao CHEN Hai-liu li Wei pan Gang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Toxic effect of Zn（II） on a green alga （Chlorella pyrenoidosa） in the presence of sepiolite and kaolinite was investigated. The Zn-free clays were found to have a negative impact on the growth of C. pyrenoidosa in comparison with control samples （without adding any clay or Zn（II））. When Zn（II） was added, the algae in the presence of clays could be better survived than the control samples, which was actually caused by a decrease in Zn（II） concentration in the solution owing to the adsorption of Zn（II） on the clays. When the solution system was diluted, the growth of algae could be further inhibited as compared to that in a system which had the same initial Zn（II） concentration as in the diluted system. This in fact resulted from desorption of Zn（II） from the zinc-contaminated clays, although the effect varied according to the different desorption capabilities of sepiolite and kaolinite. Therefore the adsorption and desorption processes of Zn（H） played an important part in its toxicity, and adsorption and desorption of pollutants on soils/sediments should be well considered in natural eco-environmental systems before their risk of toxicity to aquatic organisms was assessed objectively.

关键词： Chlorella pyrenoidosa clays adsorption and desorption toxicity

Modulation of Na_v1.8 by Lysophosphatidic Acid in the Induction of Bone Cancer Pain

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Neuroscience Bulletin 2016年第5期32卷 445-454页

作者： Hai-li pan Ben-Long liu Wei lin Yu-Qiu Zhang Center for Neuropsychiatric Diseases Institute of Life Science Nanchang University Institute of Neurobiology Institutes of Brain Science and State Key Laboratory of Medical NeurobiologyCollaborative Innovation Center for Brain Science Fudan University

Given that lysophosphatidic acid（LPA） and the tetrodotoxin-resistant sodium channel Na_v1.8 are both involved in bone cancer pain, the present study was designed to investigate whether crosstalk between the LPA receptor LPA_1（also known as EDG2） and Na_v1.8 in the dorsal root ganglion（DRG） contributes to the induction of bone cancer pain. We showed that the EDG2 antagonist Ki16198 blocked the mechanical allodynia induced by intrathecal LPA in na？ve rats and attenuated mechanical allodynia in a rat model of bone cancer. EDG2 and Na_v1.8expression in L_（4-6）DRGs was upregulated following intrathecal or hindpaw injection of LPA. EDG2 and Na_v1.8expression in ipsilateral L_（4-6）DRGs increased with the development of bone cancer. Furthermore, we showed that EDG2 co-localized with Na_v1.8 and LPA remarkably enhanced Na_v1.8 currents in DRG neurons, and this was blocked by either a protein kinase C（PKC） inhibitor or a PKCe inhibitor. Overall, we demonstrated the modulation of Na_v1.8 by LPA in DRG neurons, and that this probably underlies the peripheral mechanism by which bone cancer pain is induced.

关键词： Lysophosphatidic acid Bone cancer pain Tetrodotoxin-resistant sodium channel Nav1.8 Dorsal root ganglion

Synthesis,Characterization of Polyethylene Ionomers and Their Antibacterial Properties

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Chinese Journal of Polymer Science 2024年第8期42卷 1077-1084页

作者： Jia-Jia Wu Fei Wang Peng-Qi Wan li pan Chun-Sheng Xiao Zhe Ma Yue-Sheng li Tianjin Key Lab Composite&Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Key Lab Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Owing to its high production volume and wide range of application s,polyethylene has gained a great deal of attention,but its low surface energy and non-polar nature have limited its application in some important *** this study,ethylene/11-iodo-1-undecene copolymers were prepared and used as the intermediates to afford a series of imidazolium-based ionomers bearing methanesulfonate(CH_(3)SO_(3)^(-)),trifluoromethanesulfonate(CF_(3)SO_(3)^(-)),or bis(trifluoromethane)sulfonimide(Tf_(2)N^(-))*** tensile test results showed that the stress-at-break(7.8-25.6 MPa)and the elongation-at-break(445%-847%)of the ionomers could be adjusted by changing the counterion species and the ionic group *** importantly,the ionomers exhibited marvelous antibacterial activities against Staphylococcus aureus(***)and Escherichia coli(***).The ionomers bearing Tf_(2)N^(-)exhibited antibacterial activities>99%against both *** and *** when ionic content reached 9.1%.The imidazolium-based ionomers prepared in this work demonstrated excellent comprehensive properties,especially highefficient and broad-spectrum antibacterial ability,exhibiting the potential fo r the application as the antibacterial materials in packaging,medical,and other fields.

关键词： Polyethylene Ionomer Polymerization catalysis Imidazolium Antibacterial material

Site preference of Ti and Nb in L1-(2)-ordered Co-Al-W phase and their effect on the properties of the alloy:first-principles study

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Communications in Theoretical Physics 2021年第2期73卷 124-130页

作者： Zihan Wang Jianxin Zhang pan li Youjian Zhang Huixin Jin Wenyang Zhang Key Laboratory for liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education)School of Materials Science and Engineering Shandong UniversityJipan 250061China

In this work,the equilibrium structure,electronic and elastic properties of L1_(2)-ordered Co-Al-W and Co-Al-W-X(X=Ti and Nb)phase were calculated,using first-principles *** six nonequivalent sites(Al_(1),Al_(2),Co_(3),Co_(4),W_(5),W_(6)),Ti and Nb prefer to occupy the W_(6)site,since the formation enthalpy of the system is lowest when Ti and Nb occupy the W。*** Ti and Nb most affect the density of states of Al *** with the Al_(2) site,which is the sub-preference site of Ti and Nb,the density of states of Al atoms is higher with the addition of Ti and Nb in the W_(6)site,which means that the latter system is more *** to the bulk modulus B,shear modulus G,Young's modulus E,hardness Hv and Poisson's ratioσ,for Co_(3)(AI,W)alloy,the addition of Ti and Nb in the W_(6)site decreases its hardness hut increases its *** work cnnfirms that Ti and Nh can stahilize the Cag(Al,W)alloy and have a positive effect in solving the relatively poor ductility of this alloy,which has important implications for the development of *** alloys.

关键词： Co-Al-W phase equilibrium structure electronic and elastic properties first-principles study