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Electrooxidation of Hydroxypivalaldehyde in an Undivided Cell

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Chemical Research in Chinese Universities 2006年第5期22卷 626-630页

作者： yu Jian-guo CAO Xue-jing ZHANG Heng-bin ZHANG yu-min li ke-chang College of Chemistry Jilin University Changchun 130021 P. R. China

The factors affecting the electrooxidation of hydroxypivalaldehyde（HPAL） in an undivided cell were studied by using cyclic voltammetry（CV）, linear scan voltammetry（ LSV）, and potentiostatic electrolysis. The electrocatalytic activity and stability of a PbO2 electrode in sulfuric acid, acetic acid, and phosphoric acid were studied. The selectivity and the current efficiency for producing hydroxypivalic acid were explored with different supporting electrolytes, concentrations of HPAL, and pH values. The results show that higher selectivity and current efficiency for producing hydroxypivalic acid can be achieved when sulfuric acid with a high concentration is used as the supporting electrolyte and the selectivity and the current efficiency can reach 80% and 60%. resvectively.

关键词： Hydroxypivalaldehyde Hydroxypivalic acid Electrooxidation Electrosynthesis

Synthesis and Characterization of PEG-scuteilarin Conjugates,a Potential PEG Ester Prodrug for the Oral Delivery of Scutellarin

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Chinese Chemical Letters 2006年第1期17卷 85-88页

作者： Qing Song ZHOU Xue Hua JIANG Jia Rui yu ke Jia li West China School of Pharmacy Sichuan University Chengdu 610041

Highly water soluble esters of scutellarin with variable molecular weight polyethylene glycol （PEG） were prepared via PEGylation. The physicochemical properties and the stabilities under different conditions were investigated. By PEG modification, the greatly increased water solubility and desirable partition coefficient of scuteUarin were obtained, and the results showed that these conjugates were potential prodrugs for the oral delivery of scuteUarin.

关键词： Scutellarin PEGylation prodrug physicochcmical properties stability.

Low-Temperature Properties of CePt_3P Tuned by Magnetic Field

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Chinese Physics Letters 2019年第5期36卷 98-101页

作者： Jian Chen Bai-Jiang Lv Shi-Yi Zheng yu-ke li Zhejiang University of Water Resources and Electric Power Hangzhou 310018 Zhejiang Provincial key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang UniversityHangzhou 310027 Department of Physics Hangzhou Normal UniversityHangzhou 310036

We present low-temperature magnetization, magnetoresistance and specific heat measurements on the Kondo lattice compound CePt_3P under applied magnetic fields up to 9.0 T. At zero field, CePt_3P exhibits a moderately enhanced Sommerfeld coefficient of electronic specific heat γCe=86 mJ/mol·K^2 as well as two successive magnetic transitions of Ce 4f moments: an antiferromagnetic ordering at T_(N_1) = 3.0 K and a spin reorientation at T_(N_2)=1.9 K. The value of T_(N_1) shifts to lower temperature as magnetic field increases, and it is ultimately suppressed around B_c ～3.0 T at 1.5 K. No evidence of non-Fermi liquid behavior is observed around B_c down to the lowest temperature measured. Moreover, γ decreases monotonously with increasing the magnetic field. On the other hand, the electrical resistivity shows an anomalous temperature dependence ρ∝T^n with the exponent n decreasing monotonously from ～2.6 around B_c down to ～1.7 for B = 9.0 T. The T-B phase diagram constructed from the present experimental results of CePt_3P does not match the quantum criticality scenario of heavy fermion systems.

关键词： Low-Temperature Properties of CePt3P Tuned by Magnetic Field AFM MMT QCP

Combined Study of Structural, Magnetic and Transport Properties of Eu_(0.5)Ln_(0.5)BiS_(2)F Superconductor

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Chinese Physics Letters 2021年第4期38卷 111-116页

作者： Hui-Fei Zhai Bo lin Pan Zhang Hao Jiang yu-ke li Guang-Han Cao Department of Physics Northwest UniversityXVan 710127China Department of Physics Zhejiang UniversityHangzhou 310027China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China Department of Physics Hangzhou Normal UniversityHangzhou 310036China

Superconductivity below 0.3 K and a charge-density-wave-like(CDW-like) anomaly at 280 K were observed in EuBiS_(2)F *** we report a systematic study of structural and transport properties in Eu_(0.5)Ln_(0.5)BiS_(2)F(Ln=La,Ce,Pr,Nd,Sm) by electrical resistivity,magnetization,and specific heat *** lattice constants have a significant change upon rare earth substitution for Eu,suggesting an effective *** Ln is changed from Sm to La,the superconducting transition temperature T_(c) increases from 1.55 K to 2.8 *** contrast to the metallic parent compound,the temperature dependence of electrical resistivity displays semiconductinglike behavior for all the Eu_(0.5)Ln_(0.5)BiS_(2)F ***,the CDW-like anomaly observed in EuBiS2F is completely *** the mixed valence state in the undoped compound,Eu ions in these rareearth-doped samples are mainly divalent.A specific anomaly at 1.3 K resembling that in EuBiS_(2)F suggests the coexistence of superconductivity and spin glass state for Eu_(0.5)Ln_(0.5)BiS_(2)*** of ferromagnetic order and superconductivity is found below 2.2 K in Eu_(0.5)Ln_(0.5)BiS_(2)F *** results supplies a rich diagram showing that many interesting properties can be induced in BiS_(2)-based compounds.

关键词： resistivity compound Superconductor

Restricted Fault Diameter of Hypercube Networks

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Acta Mathematicae Applicatae Sinica 2003年第2期19卷 247-254页

作者： Jun-ming Xu, yu-ping Yao, ke-li XuDepartment of Mathematics, University of Science and Technology of China, Hefei, 230026, China Department of Mathematics University of Science and Technology of China Hefei China

Abstract This paper studies restricted fault diameter of the n-dimensional hypercube networks Qn (n S 2). It is shown that for arbitrary two vertices x and y with the distance d in Qn and any set F with at most 2nm3 vertices in Qn m {x,y}, if F contains neither of neighbor-sets of x and y in Qn, then the distance between x and y in Qn m F is vigen byFurthermore, the upper bounds are tight. As an immediately consequence, Qn can tolerate up to 2nm3 vertices failures and remain diameter 4 if n=3 and n+2 if nS4 provided that for each vertex x in Qn, all the neighbors of x do not fail at the same time. This improves Esfahanian's result.

关键词： keywords Restricted connectivity restricted fault diameter hypercubes

Persistent Muellerian duct syndrome with transverse testicular ectopia

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Asian Journal of Andrology 2006年第6期8卷 745-747页

作者： yue-You liang Fu-Fu Zheng yu-Ping Dai ke-li Zheng Jie-Xue Zhou Department of Urology The Firt Affiliated HospitalSun Yat-Sen UniversityGuangzhou 510080China

Persistent Muellerian duct syndrome （PMDS） is a rare form of male pseudohermaphrodism without the feature of ambiguous *** present a case of PMDS with transverse testicular ectopia（TTE）.

关键词： pseudohermaphrodism persistent Muellerian duct syndrome transverse testicular ectopia

Utility of adenovirus-mediated Fas ligand and bcl-2 gene transfer to modulate rat liver allograft survival

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Hepatobiliary & Pancreatic Diseases International 2006年第4期5卷 505-510页

作者： De-Sheng Wang, yu li, ke-Feng Dou, Kai-Zong li and Zhen-Shun Song Department of Hepatobiliary Surgery, Xijing Hospital Research Centre of Cell Engineering , Fourth Military Medical University, Xi’an 710032, China Department of Hepatobiliary Surgery Xijing Hospital Fourth Military Medical University Xi'an 710032 China. wangdesh@***

BACKGROUND: Expression of Fas ligand (FasL) on the graft by gene transduction is expected to introduce apoptosis to lymphocytes to protect rejection, but the FasL-expressing graft cells may also induce apoptosis as the graft usually expresses Fas antigens. In this study, a strong antiapoptotic gene, bcl-2, was cotransfected with the FasL gene in rat liver graft to protect against Fas- mediated cell death and to prolong recipient survival. METHODS: Orthotopic liver transplantation was done in a strain combination of DA to LEW rats. After donor vascular isolation, adenovirus-mediated FasL and bcl-2 genes were cotransfected in the liver graft. RESULTS: Intragraft expression of FasL mRNA was constitutively expressed after adenovirus-mediated transduction, although expression of FasL increased mildly in control grafts. Bcl-2 mRNA was highly expressed at 2 days after reperfusion. In contrast, lower expression of bcl-2 was observed in the control group. The average survival of the gene transferred allografts increased from (9.8+1.3) days to (18.5+8.7) days compared with the control group. CONCLUSION: Our results indicate that rat liver allografts can be protected against host immune responses by adenovirus-mediated FasL and bcl-2 transfection, and that bcl-2 expression prevents the graft from Fas-mediated apoptosis.

关键词： Fas ligand bcl-2 liver transplantation immune tolerance

Hepatobiliary membrane transporters involving in the formation of cholesterol calculus

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Hepatobiliary & Pancreatic Diseases International 2006年第2期5卷 286-289页

作者： Fan-Min Kong, Chun-Yang Sui, yu-Ji li, ke-Jian Guo and Ren-Xuan Guo Department of General Surgery, First Affiliated Hospital, China Medical University, Shenyang 110001, China Department of General Surgery First Affiliated Hospital China Medical University Shenyang 110001 China. kong_fanmin@***

BACKGROUND: Cholecyst cholesterol lithiasis is a common disease of the digestive system; however, the cause of lithogenesis is still unclear. Although bile salt export pump (BSEP), multidrug resistance protein 2 (MRP2), and multiple drug resistance 3 (MDR3 ) are 3 well-known transporting proteins, their effect on lithogenesis has not been elucidated. This study was undertaken to examine the relationship between BSEP, MRP2, MDR3, and cholesterol calculus formation. METHODS: liver tissue specimens were taken from 20 patients with cholesterol calculus and from 10 patients with normal liver. mRNA and protein expressions of BSEP, MRP2, and MDR3 were determined by reverse tran-scriptase-polymerase chain reaction (RT-PCR) and Western blot, respectively. This study was approved by the ethics committee of China Medical University and informed consent was obtained from all patients. RESULTS: mRNA and protein expressions of BSEP, MRP2, and MDR3 were significantly down-regulated in the liver tissue of the patients with cholesterol calculus compared with normal liver tissue of the controls. CONCLUSION: The down-regulation of BSEP, MRP2, and MDR3 may be correlated with the formation of cholesterol calculus.

关键词： cholecyst cholesterol lithiasis bile salt export pump multidrug resistance protein 2 multiple drug resistance 3

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基于批评性话语分析的网络语言暴力研究框架

东北师大学报（哲学社会科学版） 2017年第1期 119-124页

作者：刘文宇李珂大连理工大学外国语学院辽宁大连116024

在综述网络语言暴力研究现状的基础上,识别了当前两种主流研究范式并指出了其各自的不足。为了弥补当前研究在中观层面的关注不足,提出了网络语言暴力的批评性话语分析研究视角与框架。该框架利用微观层面互联网语篇分析来重构中观层面... 详细信息

在综述网络语言暴力研究现状的基础上,识别了当前两种主流研究范式并指出了其各自的不足。为了弥补当前研究在中观层面的关注不足,提出了网络语言暴力的批评性话语分析研究视角与框架。该框架利用微观层面互联网语篇分析来重构中观层面网络语言暴力的事件—过程,同时结合宏观层面的社会情境来展现"暴力的语言"向"语言的暴力"演变背后的驱动机制和社会操纵过程,可为下一步的网络语言暴力研究提供启示和引导。

关键词：批评性话语分析网络语言暴力污名化网络欺凌人肉搜索