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2,3-Dimercaptosuccinic acid self-assembled gold electrode for the simultaneous determination of epinephrine and dopamine

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Chinese Chemical Letters 2009年第2期20卷 221-224页

作者： Wei Jun Kang ling Mei niu li Ma School of Public Health Hebei Medical University Shijiazhuang 050017 China

Simultaneous determination of epinephrine （EP） and dopamine （DA） at 2,3-dimercaptosuccinic acid （DMSA） modified electrode was studied. The oxidation peaks of the mixture of EP and DA appeared at the same potential, but the cathodic peak currents were only linear to the concentration of DA, whereas the anodic peak currents were equal to the sum of individual anodic peak currents of EP and DA. Therefore, a novel electrochemical method for the simultaneous determination of EP and DA at a DMSA modified electrode （DMSA/Au electrode） by cyclic voltammetry was established. The DMSA self-assembled electrode showed good sensitivity, selectivity and stability and could be used to determine DA and EP, simultaneously, in the real application with satisfactory results.

关键词： 2,3-Dimercaptosuccinic acid Simultaneous determination Dopamine Epinephrine

Hydrothermal Synthesis and Crystal Structure of a Hybrid Compound Based on β-Octamolybdate [Mn(2,2’-bipy)_3]_2[β-Mo_8O_(26)]·4H_2O

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Chinese Journal of Structural Chemistry 2005年第10期24卷 1164-1168页

作者： SHEN Yue YU li niu Jing-Yang WANG Jing-Ping School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

A hybrid compound [Mn（2,2＇-bipy）3]2[β-Mo8O26]·4H2O prepared by the hydrothermal method consists of a [β-Mo8O26]^4- isopolyanion, two isolated manganese-bipyridyl units [Mn（2,2＇-bipy）3]^2＋ and four crystal water molecules. Each [Mn（2,2＇-bipy）3]^2＋ is defined by six nitrogen atoms from three 2,2＇-bipyridine molecules forming a distorted MnN6 octahedron. Crystallographic data for the title compound： monoclinic, space group P21/c, a = 12.156（2）, b = 13.738（3）, c = 21.949（4） A,β = 90.44（3）°, V = 3665.3（13） A^3, Mr = 2302.57, Z = 2, Dc = 2.086 g/cm^3, F（000） = 2252, T= 293（2） K,μ（Mo-Kα） = 1.745 mm^-1, R = 0.0436, wR = 0.1056, and GOF = 1.074 for 550 parameters and 5515 observed reflections with I 〉 2σ（I）.

关键词： hydrothermal synthesis isopolyanion crystal structure octamolybdate

融入思政元素的科研诚信讲座在口腔修复学研究生教育中的应用

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中国继续医学教育 2024年第2期16卷 148-153页

作者：宋文蒙萌牛丽娜王富军事口腔医学国家重点实验室/口腔疾病国家临床医学研究中心/陕西省口腔医学重点实验室/空军军医大学第三附属医院修复科陕西西安710032

目的分析将思政元素融入科研诚信教育在口腔修复学研究生培养中的作用。方法于2018年9月—2022年6月选取第四军医大学口腔医院2018、2019两届口腔修复学研究生为研究对象,分别为对照组和试验组,每组各12名。在进入科室开始阶段、开展研... 详细信息

目的分析将思政元素融入科研诚信教育在口腔修复学研究生培养中的作用。方法于2018年9月—2022年6月选取第四军医大学口腔医院2018、2019两届口腔修复学研究生为研究对象,分别为对照组和试验组,每组各12名。在进入科室开始阶段、开展研究阶段、论文写作阶段分别进行一次科研诚信讲座,其中对照组采用传统的科研诚信讲座,试验组在该讲座的基础上融入经过设计的思政元素;讲座结束后对学生进行科研诚信基本知识考核,并对满意度、学科认同感、科研信心三个方面进行问卷评价,学生毕业后对其开题、中期、答辩、原始记录、研究论文等方面进行综合评价。结果试验组科研诚信基本知识考核得分(87.92±3.66)分,高于对照组的(92.42±2.39)分,差异有统计学意义(P0.05),在学科认同感、科研信心方面,试验组得分分别为(4.92±0.29)分、(4.33±0.65)分,均高于对照组的(4.08±0.67)分、(2.33±0.78)分,差异有统计学意义(P<0.05);试验组各项科研能力的综合评分均高于对照组,差异有统计学意义(P<0.001)。结论融入思政元素的科研诚信教育效果良好,且有利于提升研究生的学科认同感和科研信心,避免科研失信行为。

关键词：科研诚信学术不端课程思政口腔医学研究生教育问卷评价

The Simultaneous Three-channel Multicolor CCD Photometric System of the 1.2 m Telescope at Jilin Astronomical Observatory

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Research in Astronomy and Astrophysics 2022年第5期22卷 75-86页

作者： Bing-li niu Cheng-Zhi liu Zhen-Wei li Zhe Kang You Lv Changchun Observatory National Astronomical ObservatoriesUniversity of Chinese Academy of SciencesChangchun 130117China University of the Chinese Academy of Sciences Beijing 100049China

We will introduce the construction and design of a new simultaneous three-channel multicolor CCD *** photometer has been mounted on the 1.2 m telescope at Jilin Astronomical Observatory,and is applied to study space debris,gamma-ray burst afterglows,asteroids and other rapidly variable *** one of the ground follow-up telescopes of the Chinese-French Space-based multi-band astronomical Variable Objects Monitor(SVOM)mission,it appears very essential to evaluate the performance of the photometry system of this photometer,which can achieve simultaneous imaging within a field of view of 21’.5×21’.5,21’.5×21’.5 and21’.3×21’.3 in the Sloan Digital Sky Survey(SDSS)g’,r’,i’bands,*** calibrations were carried out by using plenty of SDSS standard stars,and the relationship between the photometric system and the Johnson-Bessel filter system was also *** results of the performance evaluation from observing open cluster M67 are presented.

关键词： astronomical instrumentation-photometer-photoelectric photometry

Crystal structure and surface photo-electric property of Mn(Ⅱ) coordination supramolecules

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Chinese Science Bulletin 2008年第3期53卷 339-346页

作者： ZHANG li niu ShuYun JIN Jing SUN liPing School of Chemistry and Chemical Engineering Liaoning Normal University Dalian 116029 China

Two Mn(II)coordination supramolecules,[Mn2(C8H7O2)4(phen)2(μ-H2O)](1)and [Mn2(btec)(phen)2(H2O)6].2H2O(2)(phen=1,10-phenanthroline,H4btec=1,2,4,5-benzenetetracarboxylic acid),were synthesized by hydrothermal *** crystal structures of the complexes were determined by X-ray single crystal *** result indicates that(1)and(2)are both binuclear Mn(II)*** existence of hydrogen bonds makes the binuclear complexes become further connected to coordination su-pramolecules,which possess 1D and 3D infinite structures *** complexes were identified by IR,UV-Vis,surface photovoltage spectrum(SPS)and field-induced surface photovoltage spectrum(FISPS).The results of SPS for the complexes indicate that they both exhibit positive surface photo-voltage response bands in the range of 300―600 *** SPS phase spectrum and FISPS of com-plexes indicate that they show certain p-type semiconductor ***,the intensity,position and number of the SPV response bands are different *** difference of the SPV re-sponse bands is mainly attributed to the different structures of the complexes and the different coor-dination environment of Mn(Ⅱ)in the two *** paper discusses the action of hydrogen bonds in the construction of the supramolecule and the change on the surface photovoltage of com-plex in different coordination environment.

关键词：锰配位超分子晶体结构表面光电性能氢键结合

Gene therapy for type 1 diabetes mellitus in rats by gastrointestinal administration of chitosan nanoparticles containing human insulin gene

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World Journal of Gastroenterology 2008年第26期14卷 4209-4215页

作者： li niu Yan-Cheng Xu Zhe Dai Hui-Qin Tang Department of Endocrinology Zhongnan Hospital of Wuhan UniversityWuhan 430071 Hubei Province China

AIM:To study the expression of human insulin gene in gastrointestinal tracts of diabetic rats. METHODS: ***, an expression plasmid of the human insulin gene, wrapped with chitosan nanoparticles, was transfected to the diabetic rats through lavage and coloclysis, respectively. Fasting blood glucose and plasma insulin levels were measured for 7 d. Reverse transcription polymerase chain reaction (RT-PCR) analysis and Western blot analysis were performed to confirm the expression of human insulin gene. RESULTS: Compared with the control group, the fasting blood glucose levels in the lavage and coloclysis groups were decreased significantly in 4 d (5.63 ± 0.48 mmol/L and 5.07 ± 0.37 mmol/L vs 22.12 ± 1.31 mmol/L, respectively, P lin levels were much higher (32.26 ± 1.81 μIU/mL and 32.79 ± 1.84 μIU/mL vs 14.23 ± 1.38 μIU/mL, respectively, P lin gene mRNA and human insulin were only detected in the lavage and coloclysis groups. CONCLUSION: Human insulin gene wrapped with chitosan nanoparticles can be successfully transfected to rats through gastrointestinal tract, indicating that chitosan is a promising non-viral vector.

关键词： Gastrointestinal tract Human insulin gene Gene expression Diabetes mellitus Chitosan nanoparticle

Small organic amine assisted synthesis of an extra-large pore containing open-framework zinc-cobalt phosphate templated by a chain-type polyamine

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Science China Chemistry 2009年第9期52卷 1485-1489页

作者： li DaiPing SONG HaiBin WANG HongGen li niu GUAN NaiJia XIANG ShouHe Institute of New Catalytic Material Science College of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Elemento-Organo Chemistry Nankai UniversityTianjin 300071China

An open-framework zinc-cobalt phosphate CoZnPO4-V with 16-ring extra-large-pore channels has been obtained in the presence of chain-type polyamines as the structure directing agent (SDA). Its large single crystal suited for structure refinement has been prepared with the assistance of small organic amines. Single-crystal X-ray diffraction analysis has shown that CoZnPO4-V is a novel metal phosphate. It crystallizes in monoclinic space group P21/c (No. 14), with a = 31.936(3) , b = 8.3775(7) , c = 15.7874(13) , α = γ = 90°, β = 97.0530(10)°, V = 4191.8(6) 3, and Z = 4 with R1 = 0.0455,wR2 = 0.0869. Its three-dimensional framework can be considered as stacking from two-dimensional nets and one-dimensional units as linkers. Between the stacking nets and linkers are located extra-large channels with 16-ring apertures.

关键词： zinc-cobalt phosphate chain-type polyamines structure directing agent small organic amine

二维材料场效应晶体管生化传感器件的研究进展

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分析化学 2024年第2期52卷 157-165页

作者：寇翠云罗一语胡海国包宇郭志男牛利广州市传感材料与器件重点实验室广州大学化学化工学院分析科学技术研究中心广东省光电传感材料与器件工程技术研究中心

场效应晶体管（Field effect transistor, FET）生化传感器件具有噪声小、功耗低、免标记、易于集成和小型化等优点，在环境监测、食品安全、疾病诊断和临床治疗等领域具有良好的应用前景。二维材料作为新一代FET生化传感器件的沟道材... 详细信息

场效应晶体管（Field effect transistor, FET）生化传感器件具有噪声小、功耗低、免标记、易于集成和小型化等优点，在环境监测、食品安全、疾病诊断和临床治疗等领域具有良好的应用前景。二维材料作为新一代FET生化传感器件的沟道材料，具有原子级厚度、高载流子迁移率、高比表面积和可调带隙等特性，可进一步提升FET生化传感器件的性能和拓展器件应用场景，推动FET生化传感器件的快速发展。本文综述了近年来二维材料FET生化传感器件的发展历程和最新进展，分析了二维材料FET生化传感器件的挑战和发展前景，以期为研究人员设计新的生化传感器件提供思路，促进生化传感技术的进一步发展。

关键词：生化传感器件二维材料场效应晶体管评述

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涂装滑橇输送系统柔性化研究与探讨

现代涂料与涂装 2024年第3期27卷 35-37页

作者：牛利超许健尚华斌李国民中国汽车工业工程有限公司

介绍了涂装车间的滑橇输送系统，研究了涂装滑橇输送系统柔性化生产的关键技术，并着重介绍了汽车涂装滑橇输送系统柔性化的主要途径及方式特点、应用场合，通过对比分析，为汽车涂装车间的工程设计、柔性化、智能化拓展了思路。

关键词：涂装车间滑橇输送系统柔性化关键技术对比分析