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Chinese Physics B 2017年第2期26卷 441-445页

作者： hong-xia Liu Shu-ping Deng De-cong Li Lan-xian Shen Shu-kang Deng Education Ministry Key Laboratory of Renewable Energy Advanced Materials and Manufacturing Technology Yunnan Normal UniversityKunming 650500China Photoelectric Engineering College Yunnan Open UniversityKunming 650500China

This study prepares a group of single crystalline β-Zn_4Sb_3 with Ge and Sn codoped by the Sn-flux method according to the nominal stoichiometric ratios of Zn_（4.4）Sb_3 Ge_xSn_3（x = 0–0.15）. The prepared samples possess a metallic luster surface with perfect appearance and large crystal sizes. The microscopic cracks or defects are invisible in the samples from the back-scattered electron image. Except for the heavily Ge-doped sample of x = 0.15, all the samples are single phase with space group R3c. The thermal analysis results show that the samples doped with Ge exhibit an excellent thermal *** with the polycrystalline Ge-substituted β-Zn_4Sb_3, the present single crystals have higher carrier mobility, and hence the electrical conductivity is improved, which reaches 7.48×10~4S·m^（-1） at room temperature for the x = 0.1 *** change of Ge and Sn contents does not improve the Seebeck coefficient significantly. Benefiting from the increased electrical conductivity, the sample with x = 0.075 gets the highest power factor of 1.45×10^（-3）W·m^（-1）·K^（-2. at 543 K.

关键词： thermoelectric materials β-Zn4Sb3 flux method electrical transport properties

大学新生化学学习动机与实验室安全认知关系研究

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天津理工大学学报 2024年第2期40卷 156-160页

作者：刘晓清姚虹金星龙薛松王晓艳天津理工大学环境科学与安全工程学院天津300384 西北师范大学化学化工学院甘肃兰州730070 天津理工大学化学化工学院天津300384

为考察大学新生化学学习动机与实验室安全认知的关系,采用问卷调查的方法,对某高校化学化工学院、生命科学学院新生进行研究,以期为后续实验室安全教育提供科学依据。根据2.9份有效问卷,从内部动机、外部动机、安全意识与态度、安全动... 详细信息

为考察大学新生化学学习动机与实验室安全认知的关系,采用问卷调查的方法,对某高校化学化工学院、生命科学学院新生进行研究,以期为后续实验室安全教育提供科学依据。根据2.9份有效问卷,从内部动机、外部动机、安全意识与态度、安全动机、安全遵从和安全参与6个维度,对其进行描述性分析、差异分析和相关性分析。结果表明:大学新生化学学习动机水平一般;不同学院学生在化学学习内部动机和外部动机、安全遵从、安全参与方面差异显著;且不同学院学生化学学习内部动机与安全参与为显著正相关。

关键词：化学学习动机安全认知安全意识与态度安全动机安全遵从安全参与

Numerically Solving Quark-Loop Effects on Dressed Gluon Propagator in Chiral Limit

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Communications in Theoretical Physics 2008年第4期49卷 1001-1003页

作者： WANG Jing SHI Yuan-Mei HOU Feng-Yao SUN Wei-Min ZONG hong-Shi PING Jia-Lun Department of Physics Nanjing Normal University Nanjing 210097 China Department of Physics Nanjing University Nanjing 210093 China Joint Center for Particle Nuclear Physics and Cosmology Nanjing 210093 China School of Physics and Microelectronics Shandong University Jinan 250100 China

We do a numerical calculation on the quark-loop effects on the dressed gluon propagator in the chiral limit. It is found that the quark-loop effects on the dressed gluon propagator are significant in solving the quark propagator in the rainbow approximation of the Dyson-Schwinger equation. The approach we used here is quite general and can also be used to calculate both the chemical potential and current quark mass dependence of the dressed gluon propagator.

关键词： gluon propagator quark-loop effects

Research on Chinese Culture Aphasia in College English Teaching and Countermeasures

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Sino-US English Teaching 2017年第7期14卷 414-420页

作者： PENG hong-li Leshan normal university Sichuan China

With the realization of globalization, intercultural communication has grown in significance. However, someChinese scholars in foreign language education field have noticed a disappointing phenomenon--Chinese cultureaphasia during intercultural communication. This paper will discuss the relationship between culture and languageand reveal that it is important to introduce Chinese culture to the outside world so as to have effective andharmonious communication. Based on this theoretical framework, this thesis analyzes the phenomenon of theChinese culture aphasia in current college English teaching and proposes solutions to the problem.

关键词： culture and language, college English teaching, Chinese culture, countermeasures

下调miR-155对创伤性脑损伤后小鼠肠组织claudin-1的影响

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新疆医学 2024年第3期54卷 263-267页

作者：雷泓顾莹敖德莉初美玲宋云林克拉玛依市中心医院麻醉科新疆克拉玛依834000 新疆医科大学第一附属医院重症医学中心乌鲁木齐830054

目的探讨miR-155对颅脑损伤后小鼠肠黏膜组织中紧密连接蛋白claudin-1表达的影响,分析miR-155对TBI后肠黏膜屏障功能障碍的诊断价值及治疗方向。方法30只C57BL/6小鼠,建立TBI模型后,分为miR-155组和对照组,miR-155组给予AAV-mmu-mir-155... 详细信息

目的探讨miR-155对颅脑损伤后小鼠肠黏膜组织中紧密连接蛋白claudin-1表达的影响,分析miR-155对TBI后肠黏膜屏障功能障碍的诊断价值及治疗方向。方法30只C57BL/6小鼠,建立TBI模型后,分为miR-155组和对照组,miR-155组给予AAV-mmu-mir-155-5p inhibitor,对照组给予同等容量生理盐水。干预2. h后处死小鼠取血清及小肠组织进行相关检测。结果miR-155处理组血清中二胺氧化酶(DAO)水平较对照组低,且有统计学差异(P0.05)。结论MiR-155在肠黏膜屏障功能障碍的发生发展中起重要作用,且可能是通过靶向调控claudin-1来影响肠黏膜屏障功能的。

关键词：肠黏膜屏障功能障碍 miR-155 TBI Claudin-1

A Simple Approach for Synthesis of TAPO-11 Molecular Sieve with Controllable Space Group

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Chinese Chemical Letters 2006年第10期17卷 1409-1412页

作者： Yue Ming LIU Huan Yan ZHANG Hai Jiao ZHANG Hai hong WU Peng WU Ming Yuan HE Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of Chemistry East China Normal University Shanghai 200062

A TAPO-11 molecular sieve with the space group lcm2.was synthesized successfully. The samples with different space group were controlled simply only by adjusting the crystallization temperature （CT） in the hydrothermal system. In the system of gel with a molar composition of 0.7R- xTiO2. P2.5： Al2.3： 30H2., where x is 0.01-0.10 and the R is a mixture of di-n-propylamine and diisopropylamine as templates. When CT was between 150-160℃, the calcined sample showed the space group of Icm^2. while it showed Pna2. at CT larger than 190℃. The characterizations of UV-Vis and FT-IR confirmed that Ti was incorporated into the AEL framework successfully.

关键词： TAPO-11 molecular sieve space group synthesis titanosilicate

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基于STM32.103的电流检测系统设计

电工电气 2024年第10期 14-18页

作者：孙康亚高红亮段玉龙周成子湖北师范大学电气工程与自动化学院湖北黄石435000

在电力系统中,实时检测系统的电流大小非常关键。基于STM32.103芯片设计了一款实时检测电路中电流大小的设备,该设备测得的电流通过LCD显示出来,便于观察,另一方面将这些实时的数据储存在SD卡设备上,对数据进行记录。该设备加入了FreeR... 详细信息

在电力系统中,实时检测系统的电流大小非常关键。基于STM32.103芯片设计了一款实时检测电路中电流大小的设备,该设备测得的电流通过LCD显示出来,便于观察,另一方面将这些实时的数据储存在SD卡设备上,对数据进行记录。该设备加入了FreeRTOS实时操作系统,更合理有效地利用CPU的资源,简化应用软件的设计,缩短系统开发时间,更好地保证了系统的实时性和可靠性。

关键词： STM32.103芯片电流检测系统 FreeRTOS实时操作系统数据采集电流传感器

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烟碱对小鼠中枢神经炎症的改善作用及其机制

山东医药 2024年第2期64卷 43-47页

作者：刘薇陈璟莉严虹任凌云彭仕玉华中科技大学同济医学院附属武汉中心医院麻醉科武汉430014

目的探讨α7亚基N型乙酰胆碱受体(α7nAchRs)激动剂烟碱对小鼠中枢神经炎症和认知行为的改善作用及其机制。方法取雌性C57BL/6J小鼠60只,采用随机数字表法分为正常组、模型组、烟碱组、甲基牛扁亭柠檬酸盐(MLA)组,每组各15只。模型组... 详细信息

目的探讨α7亚基N型乙酰胆碱受体(α7nAchRs)激动剂烟碱对小鼠中枢神经炎症和认知行为的改善作用及其机制。方法取雌性C57BL/6J小鼠60只,采用随机数字表法分为正常组、模型组、烟碱组、甲基牛扁亭柠檬酸盐(MLA)组,每组各15只。模型组、烟碱组和MLA组腹腔注射多聚肌苷酸—多聚胞苷酸[Poly(I∶C)]12.mg/kg制备中枢神经炎症模型,正常组腹腔注射等量生理盐水。烟碱组于造模前30 min腹腔注射烟碱1 mg/kg;MLA组于造模前1 h腹腔注射α7nAchR拮抗剂MLA 5 mg/kg,造模前30 min腹腔注射烟碱1 mg/kg;模型组和正常对照组在同一时间点注射等量生理盐水。造模后3 h,采用水迷宫实验观察小鼠空间学习记忆能力,记录小鼠穿越原平台次数和逃避潜伏期;采用旷场实验观察小鼠自主运动能力,记录小鼠平均运动速度和运动距离;小鼠处死,取脑组织,采用免疫组化法观察海马及前额叶小胶质细胞激活度,评价中枢神经炎症改变程度;采用qPCR法检测脑组织炎症因子IL-6、TNF-α、INF-β、INF-α、IL-1β mRNA,Western blotting法检测脑组织NF-κB p65蛋白磷酸化水平。结果与正常组比较,模型组水迷宫实验潜伏期延长、穿越平台次数减少,旷场实验平均运动速度和运动距离减少,海马及前额叶小胶质细胞激活度增加,脑组织IL-6、TNF-α、INF-β、INF-α、IL-1β表达增加,脑组织NF-κB p65磷酸化水平增加(P均<0.05);与模型组比较,烟碱组水迷宫检测示潜伏期延长并穿越平台次数增加,旷场实验示平均运动速度以及运动距离均增加,海马及前额叶小胶质细胞激活度降低,脑组织IL-6、TNF-α、INF-β、INF-α、IL-1β表达降低,脑组织NF-κB p65磷酸化水平降低(P均<0.05);与烟碱组比较,MLA组水迷宫检测示潜伏期延长并穿越平台次数减少,旷场实验示平均运动速度以及运动距离均减少,海马及前额叶小胶质细胞激活度增加,脑组织IL-6、TNF-α、INF-β、INF-α、IL-1β表达增加,脑组织NF-κB p65磷酸化水平增加(P均<0.05)。结论烟碱能够改善Poly(I∶C)所引起的小鼠中枢神经炎症和认知行为改变,其机制与烟碱作用于α7nAchR后减少NF-κB p65磷酸化,进而减少炎症因子释放有关。

关键词：烟碱中枢神经炎症多聚肌苷酸—多聚胞苷酸胆碱能抗炎通路动物实验

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Molecular Dynamics Simulations of the Elastic Anisotropy of Pd at Extreme Conditions

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Communications in Theoretical Physics 2018年第6期69卷 735-740页

作者： Xiu-Lu Zhang Yun-Xia Han hong Jia Nuo Qu Zhong-Li Liu Laboratory for Extreme Conditions Matter Properties Southwest University of Science and Technology621010 Mianyang China College of Physics and Electric Information Luoyang Normal University Luoyang 471022 China

It is very interesting to discover the elastic properties of engineering material palladium, especially its elastic anisotropy along Hugoniot states. We here investigate the evolution of its high pressure and temperature(PT) elastic ansotropy along Hugoniot using molecular dynamics simulations based on accurate classical interatomic potential. In order to testify the validity of the interatomic potential of Pd in describing the high PT elastic properties, we calculate its isothermal and adiabatic elastic moduli using molecular dynamics method. The obtained data are in good agreement with experimental data. From the isothermal elastic constants, we deduce the Hugoniot acoustic velocities and find that the resulting data are in good agreement with experimental acoustic velocity data. Based on the reliable elastic constants, we further investigate the spacial elastic ansotropy along Hugoniot PT states. It is found that the spacial elastic anisotropy of Pd increases along Hugoniot states.

关键词： elastic anisotropy Hugoniot states extreme conditions

Conductivity and band alignment of LaCrO_3/SrTiO_3(111) heterostructure

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Chinese Physics B 2018年第4期27卷 401-407页

作者： Yan-Peng hong Xin-Xin Wang Guo-Liang Qu Cheng-Jian Li hong-Xia Xue Ke-Jian Liu Yong-Chun Li Chang-Min Xiong Rui-Fen Dou Lin He Jia-Cai Nie Department of Physics Beijing Normal University Beijing 100875 China

In this work,we investigate the electrical transport property and electronic structure of oxide heterostructure LaCrO3/SrTiO3（111）.The interface grown under relatively low oxygen partial pressure is found to be metallic with a conducting critical thickness of 11 unit cells of *** criticality is also observed by x-ray photoelectron spectroscopy,in which the Ti^3＋ signal intensity at the spectrum edge of the Ti-2.（3/2. core level increases rapidly when the critical thickness is *** variations of the valence band offset and full width at half maximum of the core-level spectrum with LaCrO3 thickness suggest that the built-in fields exist both in LaCrO3 and in *** possible origins are proposed：the charge transfer from LaCrO3 and the formation of a quantum well in *** results shed light on the understanding of the doping mechanism at the polar/non-polar oxide ***,due to the interesting lattice and spin structure of LCO in the（111） direction,our work provides a basis for further exploring the novel topological quantum phenomena in this system.

关键词： oxide heterostructure LaCrO3/SrTiO3 (111) x-ray photoelectron spectroscopy electronic structure