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Synthesis,Crystal Structure and Magnetic Properties of a Novel Copper Inverse-9-metallacrown-3 Complex

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Chinese Journal of Structural Chemistry 2010年第7期29卷 1072-1076页

作者： LIU Guang-Xiang XU Huan-Min ren xiao-Ming Anhui Key Laboratory of Functional Coordination Compounds School of Chemistry and Chemical Engineering Anqing Normal University Anqing 246003 China

The reaction ofphenyl 2-pyridyl ketoxime （PhPyCNOH） with Cu（NO3）2·3H2O has led to a triangular complex Cu3（OH）（PhPyCNO）3（NO3）·NO3·H2O 1 containing the [Cu3（μ2-OH）]5＋ core and possessing the very rare inverse 9-metallacrown-3 motif created by the bridging oximate groups. Crystallographic data for 1： C36H30N8O11CU3, Mr = 941.30, monoclinic, space group C2/c, a = 18.815（9）, b = 33.888（15）, c = 14.307（7） A, β = 118.945（6）°, V= 7983（6） A3, Z = 8, Dc = 1.566 g/cm3, μ = 1.652 mm^-1, F（000） = 3816, R= 0.0644 and wR= 0.1393 for 3468 observed reflections （I〉 2σ（I））. Preliminary variable-temperature magnetic susceptibility studies reveal an antiferromagnetically-coupled system showing antisymmetrie exchange.

关键词： cupric complex crystal structure magnetism

A huge pancreatic lipoma mimicking a well-differentiated liposarcoma: A case report and systematic literature review

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World Journal of Clinical Cases 2019年第16期7卷 2352-2359页

作者： ren-Yi xiao Xing Yao Wei-Lin Wang Division of Hepatobiliary and Pancreatic Surgery Department of General SurgeryThe Second Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310009Zhejiang ProvinceChina Department of General Surgery Huzhou Central HospitalHuzhou 313000Zhejiang ProvinceChina

BACKGROUND Pancreatic lipomas are thought to be very *** are usually easy to identify on imaging,particularly via computed tomography (CT).But sometimes it’s quite difficult to distinguish a lipoma from a well-liposarcoma without histologic *** SUMMARY Here,we present a case of pancreatic lipoma in a 59-year-old *** was asymptomatic and had no medical history of *** and magnetic resonance imaging revealed a mass like well-differentiated liposarcoma in the pancreatic head,positron emission tomography/CT showed a low fluorodeoxyglucose uptake and laboratory tests revealed elevated transaminase and carbohydrate antigen-199 ***,the patient underwent a ***,mature adipocytes were noted in the bulk of the ***,the pathologic diagnosis of the pancreatic neoplasm was *** our knowledge,this case is the first example of a suspected well-differentiated liposarcoma that was actually a pancreatic *** also highlight the radiological features distinguishing a pancreatic lipoma from a pancreatic liposarcoma and briefly review the *** Pancreatic lipomas show no obvious gender bias and most commonly occur in the head of the pancreas,of which the maximum diameters are often less than 5 cm,and small,asymptomatic non-compressed lipomas require follow-up *** excision should be considered when the tumor has compressed important tissues or is difficult to distinguish from a liposarcoma,the choice of surgery depends on the intraoperative presentation.

关键词： Pancreatic Lipoma Liposarcoma Pancreas Case report

Microstructure characterization of a pressureless infiltrating oxidized SiCp preform by Al-8Mg

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International Journal of Minerals,Metallurgy and Materials 2011年第2期18卷 223-228页

作者： Shu-bin ren xiao-yu Shen Xin-bo He Xuan-hui Qu School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The microstructure of a pressureless infiltrating 55vol% oxidized SiC preform by Al-8Mg alloy was characterized by transmission electron microscopy （TEM）, high resolution TEM （HRTEM）, field emission scanning electron microscopy （FE-SEM）, and X-ray diffraction. The TEM image of the interface between Al and SiC shows that the surface of SiC is covered by a rough nanocrystal layer of MgAl2O4, Al2O3, and Si, produced by the interfacial reaction of Al, Mg, and SiO2 on the surface of SiC. The Al-SiC interface is also examined by HRTEM to be better understood how MgAl2O4 and Al2O3 are produced. Dendritic Al2O3 crystals are embedded in the pores of the composite generated from the mutual bonding of SiO2 on the surface of SiC. Columnar AlN crystals of about 250 nm in length are bunched vertically on the SiC particle surface.

关键词： microstructure composites interfaces pressureless infiltration oxidation.

Effect of Mg and Si on infiltration behavior of Al alloys pressureless infiltration into porous SiCp preforms

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International Journal of Minerals,Metallurgy and Materials 2011年第6期18卷 703-708页

作者： Shu-bin ren xiao-yu Shen Xuan-hui Qu Xin-bo He School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The effect of Mg and Si additon to Al matrix on infiltration kinetics and rates of Al alloys pressureless infiltration into porous SiCp preform was investigated by observing the change of infiltration distance with time as the Al alloys infiltrate into SiCp preforms at different *** results show that infiltration of SiCp preforms by Al melt is a thermal activation process and there is an incubation period before the infiltration becomes *** the increase of Mg content in the Al alloys from 0wt% to 8wt%,the infiltration will become much easier,the incubation period becomes shorter and the infiltration rate is faster,but these effects are not obvious when the Mg content is higher than 8wt%.As for Si addition to the Al alloys,it has no obvious effect on the incubation period,but the infiltration rate increases markedly with the increase of Si content from 0wt% to 12wt% and the rate has no obvious change when the content is bigger than 12wt%.The effect of Mg and Si on the incubation period is related to the infiltration mechanism of Al pressureless infiltration into SiCp preforms and their impact on the infiltration rate is a combined result from viscosity and surface tension of Al melt and SiC-Al wetting ability.

关键词： metallic matrix composites infiltration aluminum alloys silicon carbide preforms

Toward an Optimum Design of an Amorphous Silicon Photovoltaic/Thermal System:Simulation and Experiments

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Journal of Thermal Science 2023年第3期32卷 947-964页

作者： ren xiao LI Jing LIU Weixin ZHU Chuanyong PEI Gang GONG Liang College of New Energy China University of Petroleum(East China)Qingdao 266580China Research Center for Sustainable Energy Technologies Energy and Environment InstituteUniversity of HullHU67RXUK Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei 230026China

Amorphous silicon photovoltaic/thermal(a-Si-PV/T)technology is promising due to the low power temperature coefficient,thin-film property,thermal annealing effect of the solar cells,and high conversion efficiency in *** design of a-Si-PV/T system is influenced by a number of thermodynamic,structural,and external *** analysis is useful for a good design of the system.A dynamic distributed parameter model is built and verified in this *** tests are carried *** impacts of operating temperature,mass flow rate,cover ratio of solar cells,heat transfer area,and frame shadow ratio on its performance are theoretically and experimentally *** results indicate that seven or eight copper tubes are suitable to achieve a high overall efficiency of the a-Si-PV/T *** frame and tilt angle shall avoid a shadow ratio of more than 8.3%during *** difference between power outputs at operating temperatures of 35℃and55℃in the first month is about 0.21%while it drops to less than 0.1%in the twelfth *** with conventional PVT systems,the a-Si-PV/T system benefits from a higher design temperature with a minor efficiency decrement.

关键词： amorphous silicon cell photovoltaic thermal system parametric analysis distributed parameter model frame shadow

Construction of a full-thickness human corneal substitute from anterior acellular porcine corneal matrix and human corneal cells

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International Journal of Ophthalmology(English edition) 2019年第3期12卷 351-362页

作者： Kai Zhang xiao-xiao ren Ping Li Kun-Peng Pang Hong Wang Department of Ophthalmology Shandong Provincial Western Hospital Shandong Institute of Otolaryngology Department of Ophthalmology Qilu Hospital Shandong University Department of Ophthalmology Shandong Provincial Hospital Affiliated to Shandong University

AIM: To construct functional human full-thickness corneal ***: Acellular porcine corneal matrix(APCM) was developed from porcine cornea by decellulariztion. The biomechanical properties of anterior-APCM(AAPCM) and posterior-APCM(PAPCM) were checked using uniaxial tensile testing. Human corneal cells were obtained by cell culture. Suspending ring was designed by deformation of an acupuncture needle. MTT cytotoxicity assay was used to check the cytotoxicity of suspending ring soaking solutions. A new three-dimensional organ culture system was established by combination of suspending ring, 48-well plate and medium together. A human full-thickness corneal substitute was constructed from human corneal cells with AAPCM in an organ coculture system. Biochemical marker expression of the construct was measured by immunofluorescent staining and morphological structures were observed using scanning electron microscopy. Pump function and biophysical properties were examined by penetrating keratoplasty and follow-up clinical ***: There were no cells in the AAPCM or PAPCM, whereas collagen fibers, Bowman's membrane, and Descemet's membrane were retained. The biomechanical property of AAPCM was better than PAPCM. Human corneal cells grew better on the AAPCM than on the *** was no cytotoxicity for the suspending ring soaking solutions. For the constructed full-depth human corneal replacements keratocytes scattered uniformly throughout the AAPCM and expressed vimentin. The epithelial layer was located on the surface of Bowman's membrane and composed of three or four layers of epithelial cells expressing cytokeratin 3. One layer of endothelial cells covered the stromal surface of AAPCM, expressed Na+/K+ATPase and formed the endothelial layer. The construct was similar to normal human corneas, with many microvilli on the epithelial cell surface, stromal cells with a long shuttle shape, and zonula occludens on the interface of endothelial cells

关键词： full-thickness human corneal substitute anterior-acellular porcine corneal matrix posterior-acellular porcine corneal matrix human corneal cells

抗菌细菌纤维素功能材料的制备及应用研究进展

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高分子通报 2024年第7期37卷 851-867页

作者：焦苏亚陈岱滨吴昊姜岷任晓乾叶翔宇方艳南京工业大学化工学院生物与制药工程学院材料化学工程国家重点实验室南京211816 浙江省智能织物与柔性互联重点实验室浙江省轻工业品质量检验研究院杭州310018 泗阳糖宝新材料科技有限公司宿迁市(糖宝)糖基化新材料工程技术研究中心宿迁223700

作为一种环境友好型生物纳米高分子新材料,细菌纤维素具有高化学纯度、高持水性、高力学强度、生物相容性佳、生物可降解等独特性能,因而在食品、生物医学、包装、水处理及功能纺织等领域具有广泛应用。然而,天然细菌纤维素缺乏抗菌功... 详细信息

作为一种环境友好型生物纳米高分子新材料,细菌纤维素具有高化学纯度、高持水性、高力学强度、生物相容性佳、生物可降解等独特性能,因而在食品、生物医学、包装、水处理及功能纺织等领域具有广泛应用。然而,天然细菌纤维素缺乏抗菌功能元件,在储运及应用过程中很容易受到微生物污染而影响其性能发挥及进一步实际应用,因此制备具有抗菌功能的抗菌细菌纤维素功能材料尤为重要。本综述全面总结了近年来国内外有关抗菌细菌纤维素功能材料的制备方法及应用研究进展,详细介绍了后功能化改性、原位改性、共混再生改性三类制备方法的原理及优缺点,并对抗菌细菌纤维素功能材料在生物医学、包装材料、水处理、功能纺织等领域的应用情况进行了详细探讨,以期通过本综述的总结能为从事抗菌细菌纤维素功能材料的研制及应用相关研究的科技工作者提供有力指导。

关键词：细菌纤维素抗菌后功能化改性原位改性共混再生改性

基于MILS-MIUKF算法的锂离子电池宽温度全寿命荷电状态估计

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中国公路学报 2024年第8期37卷 289-301页

作者：夏雪磊杨博赵志刚刘昱申江卫肖仁鑫陈峥昆明理工大学交通工程学院北京航天发射技术研究所中国汽车技术研究中心有限公司

精确估算锂离子电池的荷电状态(State of Charge, SOC)对于克服电动汽车发展的限制并促进其更广泛的商业应用非常关键。针对宽温度全服役周期内动力电池内部状态难以精确估计的难题，提出一种融合多新息最小二乘法和多新息无迹卡尔曼滤... 详细信息

精确估算锂离子电池的荷电状态(State of Charge, SOC)对于克服电动汽车发展的限制并促进其更广泛的商业应用非常关键。针对宽温度全服役周期内动力电池内部状态难以精确估计的难题，提出一种融合多新息最小二乘法和多新息无迹卡尔曼滤波(Multi Innovation Least Squares Method-Multiple Innovation Unscented Kalman Filter, MILS-MIUKF)的锂离子电池SOC估算方法，实现了在全寿命周期内宽温度条件下锂离子电池SOC的精确估计。首先，采用二阶RC等效电路作为模型基础，利用多新息理论对传统最小二乘法进行改进，实现了动力电池内部状态的实时监测和模型参数的在线辨识，并且与传统最小二乘法辨识结果进行对比；然后，为了解决传统无迹卡尔曼滤波算法(Unscented Kalman Filter, UKF)对历史数据利用率低导致估算精度低的问题，在UKF框架内融入了多新息理论，提出了多新息UKF的锂离子电池SOC估算方法；最后，基于HPPC和UDDS两种典型的电池测试工况，进行了不同温度、不同老化状态下的试验验证，并与扩展卡尔曼滤波和UKF算法进行对比。结果表明：所提出的MILS-MIUKF方法能够有效改善最小二乘法和UKF对历史数据利用率低的缺点，并且在宽温度全寿命条件下能够准确反映动力电池内部状态和准确估算电池SOC,最大电压误差不超过60 mV,SOC估计误差控制在2%范围内，证明了所提算法的有效性。

关键词：汽车工程荷电状态多新息理论锂离子电池最小二乘法无迹卡尔曼滤波

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表栖跳虫和螨类群落对高寒草甸退化的响应

生态学杂志 2024年第1期43卷 66-74页

作者：唐思思游光年魏雪任晓陈燕王玉英吴鹏飞西南民族大学青藏高原研究院成都610041 宁夏回族自治区吴忠市第六中学宁夏吴中751100

为查明高寒草甸退化对表栖跳虫和螨类群落组成及多样性的影响,于2018年7月和10月利用吸虫器法对若尔盖湿地的沼泽草甸、草原草甸及中度退化草甸三种生境的表栖跳虫和螨类进行了调查。捕获表栖跳虫13640只,隶属于4目11科23属,优势类群为... 详细信息

为查明高寒草甸退化对表栖跳虫和螨类群落组成及多样性的影响,于2018年7月和10月利用吸虫器法对若尔盖湿地的沼泽草甸、草原草甸及中度退化草甸三种生境的表栖跳虫和螨类进行了调查。捕获表栖跳虫13640只,隶属于4目11科23属,优势类群为小圆跳属和德跳属;捕获表栖螨类5069只,隶属于3亚目76科98属(类),优势类群为真足螨科。主成分分析结果表明,表栖跳虫和螨类群落组成在不同生境间存在明显差异。随高寒草甸退化程度加重,表栖跳虫仅群落密度显著增加(P0.05)。冗余分析和多元回归分析结果表明,植物种类、生物量、土壤容重等是影响表栖跳虫和螨类群落结构及多样性的主要因子,但对表栖跳虫和螨类的具体影响存在差异。研究表明,高寒草甸的表栖跳虫和螨类群落组成、密度及多样性存在明显的时空变化,其中表栖跳虫群落密度及多样性对季节变化较敏感,表栖螨类群落密度和类群数对高寒草甸的退化较敏感。

关键词：小型节肢动物多样性群落结构若尔盖湿地