检索结果-南通市图书馆

流体剪切力通过激活Piezo 1蛋白促进肾小球内皮细胞凋亡

在线全文

学校读者我要写书评

暂无评论

基础医学与临床 2024年第9期44卷 1236-1242页

作者：罗梦琳郑峰季欣瑶祁彩虹肖雨珩牛长春西南医科大学附属医院检验科四川泸州646099 重庆市人民医院检验科重庆401121 青海省人民医院检验科青海西宁810007 青海省人民医院骨科青海西宁810007

目的探讨流体剪切力(FS)对肾小球内皮细胞(GECs)凋亡的影响及Piezo 1蛋白在其中的作用。方法对SD大鼠肾小球内皮细胞进行培养,使用Flexcell-T5000拉力仪模拟流体剪切力刺激,使用流式细胞测量技术检测细胞凋亡水平,通过免疫荧光染色试验... 详细信息

目的探讨流体剪切力(FS)对肾小球内皮细胞(GECs)凋亡的影响及Piezo 1蛋白在其中的作用。方法对SD大鼠肾小球内皮细胞进行培养,使用Flexcell-T5000拉力仪模拟流体剪切力刺激,使用流式细胞测量技术检测细胞凋亡水平,通过免疫荧光染色试验检测Piezo 1蛋白在GECs中的表达水平。使用Ca 2+指示剂(Cal-590 AM)观察流体剪切力对Piezo 1通道的激活作用。使用化学激动剂Yoda1、抑制剂GsMtx 4及慢病毒Lv-shPiezo 1调控Piezo 1蛋白功能或表达后,观察Piezo 1对GECs凋亡的影响。结果与对照组相比,剪切力组细胞凋亡率增高(P<0.05),且随着流体剪切力强度升高,细胞凋亡率增高;Piezo 1在GECs中普遍表达,且流体剪切力可以激活Piezo 1通道并增强其表达;激动剂Yoda 1可以促进GECs的凋亡,抑制剂GsMtx 4可以抑制流体剪切力诱导的凋亡;Lv-shPiezo 1敲低GECs中Piezo 1的表达,且敲低组GECs的凋亡率较对照组及Lv-Ctrl组降低(P<0.05)。结论流体剪切力通过激活Piezo 1蛋白及增强其表达促进GECs的凋亡。

关键词：流体剪切力 Piezo 1 肾小球内皮细胞凋亡 Yoda 1

INFLUENCE OF SILVER-DOPING ON THE SUPERCONDUCTIVITY FOR YBa_2Cu_30_(7-y)

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1991年第5期2卷 415-418页

作者： Jian MENG, Yu Fang REN and Man Zhi niu changchun Institute of Applied Chemistry, Academia Sinica, 130022

The effect of substituting silver for barium on the structure and superconducting properties of YBa_2Cu_3O_(7-y) has been studied. The structure of the silver-doping system (YBa_(2-x)Ag_xCu_3O_(7-y)) with x0.3, YBCO, Y_2BaCuO_5 phase and metallic silver ro-exist in the system. The superconducting transition temperature T (R=0) decrease with increasing silver content. However, the critic current density J_c is found to be enhanced from 56.6 A/cm^2 to 195 A/cm^2

关键词： YBCO INFLUENCE OF SILVER-DOPING ON THE SUPERCONDUCTIVITY FOR YBa2Cu30 Cu

Diatomic Fe-Co catalysts synergistically catalyze oxygen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第5期17卷 3794-3800页

作者： Tianmi Tang Jingyi Han Zhenlu Wang Xiaodi niu Jingqi Guan Institute of Physical Chemistry College of ChemistryJilin UniversityChangchun 130021China College of Food Science and Engineering Jilin UniversityChangchun 130062China

The design of diatomic catalysts with uniformly dispersed metal atoms is expected to improve catalytic performance,which is conducive to the intensive comprehending of the synergistic mechanism between dual-metal sites for the oxygen evolution reaction(OER)at the atomic ***,we design a strategy to immobilize bimetallic Fe-Co atoms onto nitrogen-doped graphene to obtain a diatomic catalyst(DA-FC-NG)with FeN_(3)-CoN_(3) *** DA-FC-NG shows excellent OER activity with a low overpotential(η_(10)=268 mV),which is superior to commercial iridium dioxide *** calculations uncover that the excellent activity of DA-FC-NG is due to the interaction between Fe and Co diatoms,which causes charge rearrangement and induces the adsorption of intermediates on the Fe-O-Co bridge structure,thus improving the catalytic OER *** work is of great significance for the design of highly active diatomic catalysts to replace noble metal catalysts for energy-related applications.

关键词： oxygen evolution reaction diatomic catalyst FeN_(3)-CoN_(3) X-ray absorption spectroscopy(XAS)spectrum theoretical calculation

Facile Synthesis of Polyisothioureas via Alternating Copolymerization of Aziridines and Isothiocayanates

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第3期42卷 292-298,I0005页

作者： Hao-Tian Zhang Ming-Xin niu Qi Zhang Chen-Yang Hu Xuan Pang Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Department of Materials Science and Engineering Jilin UniversityChangchun 130025China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Isothiourea is an important class of sulfur-containing molecules showing unique catalytic and biological activities. As such,polyisothiourea is envisioned to be an interesting type of polymer that potentially exhibits a number of interesting properties. However, there is no access to synthesizing well-defined polyisothiourea, and currently isothiourea-containing polymers are mainly prepared by immobilizing onto other polymer's side chain. Herein, we report the first facile synthesis of polyisothioureas via alternating copolymerization of aziridines and isothiocayanates. Mediated by the catalytic system of phosphazene superbases/alcohol, a broad scope of aziridines and isothiocayanates could be transformed into polyisothioureas with adjustable substitutions(11 examples). The structures of obtained polyisothioureas were fully characterized with ^(1)H-NMR, ^(13)C-NMR, and ^(1)H-^(13)C HMBC NMR. Moreover, the polyisothioureas show tunable thermal properties depending on substitutions on the isothiourea linkages. The novel structure of these polyisothioureas will enable a powerful platform for the discovery of nextgeneration functional plastics.

关键词： Polyisothioureas Alternative copolymer Aziridines Isothiocayanates

Preparation of Chemically Recyclable Poly(ether-alt-ester) by the Ring Opening Polymerization of Cyclic Monomers Synthesized by Coupling Glycolide and Epoxides

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第2期42卷 168-175,I0006页

作者： Feng Ren Zhuang-Zhuang Liang Ming-Xin niu Chen-Yang Hu Xuan Pang Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China

Polyester and polyether are two key oxygenated polymers, and completely alternative sequence of poly(ester-alt-ether) could efficiently combine the advantages(including flexibility, degradability, etc.) of both segments. Currently, despite their copolymers could be synthesized from one-pot mixture of cyclic esters and epoxides, perfectly alternative microstructure is very challenging to realize and typically restricted to certain monomer pairs. Moving forward, synthesizing poly(ester-alt-ether) from commercially available and largescale monomers would be a significant advance. For example, successfully commercialized poly(glycolic acid)(PGA), which is not easily soluble in polymers due to its high crystallinity and is brittle and difficult to control the degradation cycle, would encounter a new paradigm if engineered into poly(ester-altether). In this work, starting from the design of monomer with hybrid structures, we successfully synthesized a series of 1,4-dioxan-2-one containing different substituents based on glycolide(GA) and epoxides using commercially available Salen-Cr(III) and PPNCl catalytic *** new monomers underwent ring-opening polymerization(ROP) to form a series of poly(ester-alt-ether) with perfectly alternating glycolic acid and propylene glycol repeat units under catalytic system of thiourea/base. The poly(ester-alt-ether) have significantly lower glass-transition temperature than PGA. Additionally, the poly(ester-alt-ether) can be chemically recovered to monomer using Sn(Oct)2 or 1,8-diazabicyclo[5.4.0]undecane-7-ene(DBU) as a catalyst in solution, thus establishing a closed-loop life cycle. From monomers derived from GA and epoxides, this work furnishes a novel strategy for the synthesis of poly(ester-alt-ether) with chemical recyclability.

关键词： Polyester Polyether Alternative copolymer Ring-opening polymerization

急性髓系白血病患者早期血清CCN1蛋白检测及临床价值

在线全文

学校读者我要写书评

暂无评论

重庆医科大学学报 2022年第2期47卷 197-200页

作者：雷胡芯牛长春杨程廖璞西南医科大学临床医学院检验科泸州646000 陆军军医大学新桥医院血液科重庆400042

目的:研究CCN1蛋白在急性髓系白血病(acute myeloid leukemia,AML)患者早期血清中的表达水平及其与临床特征的相关性,探讨CCN1在早期急性髓系白血病中的诊断价值。方法:收集96例急性髓系白血病早期患者和159名同年龄段、性别匹配的健康... 详细信息

目的:研究CCN1蛋白在急性髓系白血病(acute myeloid leukemia,AML)患者早期血清中的表达水平及其与临床特征的相关性,探讨CCN1在早期急性髓系白血病中的诊断价值。方法:收集96例急性髓系白血病早期患者和159名同年龄段、性别匹配的健康对照者血清样本,采用ELISA检测血清中的CCN1蛋白水平,通过ROC曲线评估其作为诊断标志物的价值;比较CCN1表达水平与临床特征的相关性;分析不同AML分型分组中的血清CCN1表达是否具有差异。结果:AML早期患者血清中的CCN1表达水平明显低于健康对照组(P=0.000),ROC曲线下面积为0.823,最佳cut-off值是101.22 pg/mL,灵敏度为0.823,特异度为0.667。CCN1表达水平与临床特征无相关性。AML不同分型与对照组均有统计学差异(P=0.000),但AML各型之间的CCN1差异无统计学意义(P>0.05)。结论:CCN1蛋白在急性髓系白血病早期患者和正常人血清中表达差异显著,因此CCN1在急性髓系白血病早期诊断中可能有诊断价值。

关键词： CCN1 急性髓系白血病 ROC曲线

Corrigendum to ‘Modeling colorectal tumorigenesis using the organoids derived from conditionally immortalized mouse intestinal crypt cells (ciMICs)’ [Genes Dis 8 (2021) 814-826]

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2023年第2期10卷 618-619页

作者： Xiaoxing Wu Zhaoxia Li Hongyu Zhang Fang He Min Qiao Huaxiu Luo Jing Zhang Meng Zhang Yukun Mao William Wagstaff Yongtao Zhang changchun niu Xia Zhao Hao Wang Linjuan Huang Deyao Shi Qing Liu Na Ni Kai Fu Rex C. Haydon Russell R. Reid Hue H. Luu Tong-Chuan He Ziwei Wang Houjie Liang Bing-Qiang Zhang Ning Wang Departments of Gastrointestinal Surgery Medicine/GastroenterologyAnd Obstetrics and GynecologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Molecular Oncology Laboratory Department of Orthopaedic Surgery and Rehabilitation MedicineThe University of Chicago Medical CenterChicagoIL 606037USA Department of Oncology The PLA Rocket Force Characteristic Medical CenterBeijing 100088China Departments of Burn & Plastic Surgery West China Hospital of Sichuan UniversityChengduSichuan 610041China Department of Orthopaedic Surgery The First Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhouGuangdong 510405China Departments of Orthopaedic Surgery The Affiliated Zhongnan Hospital of Wuhan UniversityWuhanHubei 430071China Department of Orthopaedic Surgery The Affiliated Hospital of Qingdao UniversityQingdaoShandong 266000China Department of Clinical Laboratory Medicine Chongqing General Hospital Affiliated with the University of Chinese Academy of SciencesChongqing 400013China Ministry of Education Key Laboratory of Diagnostic Medicine And the School of Laboratory Diagnostic MedicineChongqing Medical UniversityChongqing 400016China Department of Orthopaedics Union Hospital of Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430022China Department of Spine Surgery Second Xiangya HospitalCentral South UniversityChangshaHunan 410008China Department of Oncology and Southwest Cancer Center Southwest HospitalArmy Medical UniversityChongqing 400038China

The authors regret that an image assembly(copy/paste)error in Figure 3D,in which the image for the organoid of"Primary MiCs"group was erroneously duplicated with an image of primary MICs that was previously *** corrected figure is shown *** shown in the corrected Figure 3D,this error does not adversely impact the conclusion of the original *** authors would like to apologise forany inconvenience caused.

关键词： Figure colorectal Cor

Engineering molecular regulation for SiO_(x) with long-term stable cycle and high Coulombic efficiency as lithium-ion battery anodes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第2期43卷 588-598页

作者： Fei Wang Han Gao Zhao-Yu niu Yao-Peng Zheng Ming-Yan Chuai Jia-Nan Xu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China University of Science and Technology of China Hefei230026China

In the current situation where the practical application of silicon anode materials encounters great challenges,silicon oxide(SiO_(x),0≤x≤2)has attracted the attention of researchers due to its relatively small volume expansion,stable cycling performance,and low cost,which is possible to realize commercial applications earlier than silicon ***,it remains a challenge to prepare SiO_(x)materials with long-term stable cycling performance and high Coulombic efficiency using low-cost *** this work,SiO_(x)anode material with high Coulombic efficiency and good long-term cycling stability was prepared at a low cost by hydrolysis of siloxane and in situ polymerization of phenolic *** hydrolysis of siloxane was further regulated by different silane coupling agents to regulate the size and microstructure of prepared SiO_(x)materials,which displayed the substantially improved electrochemical *** excellent electrochemical performance of SiO_(x)prepared by regulated hydrolysis of siloxane with silane coupling agents is attributed to the effect of silane coupling agent on size and microstructure of SiO_(x),revealing that the strategy of modulating the hydrolysis of siloxane by silane coupling agent is a potential method to prepare high-performance SiO_(x)materials.

关键词： Hydrolysis Silane coupling agent Long cycle SiO_(x) anode Lithium-ion battery(LIB)

Development of wet adhesion of honeybee arolium incorporated polygonal structure with three-phase composite interfaces

在线全文

学校读者我要写书评

暂无评论

Friction 2024年第2期12卷 215-230页

作者： Lulu LIANG Jieliang ZHAO Qun niu Li YU Xiangbing WU Wenzhong WANG Shaoze YAN Zhenglei YU School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Division of Intelligent and Biomechanical Systems State Key Laboratory of TribologyDepartment of Mechanical EngineeringTsinghua UniversityBeijing 100084China Key of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China

Inspired by the dynamic wet adhesive systems in nature,various artificial adhesive surfaces have been developed but still face different ***,the theoretical mechanics of wet adhesives has never been sufficiently ***,we develop a novel adhesive mechanism for governing wet adhesion and investigate the biological models of honeybee arolium for reproducing the natural wet adhesive ***-nano structures of honeybee arolium and arolium-prints were observed by Cryogenic scanning electron microscopy(Cryo-SEM),and the air pockets were found in the contact interface ***,the adhesive models with a three-phase composite interface(including air pockets,liquid secretion,and hexagonal frames of arolium),were formed to analyze the wet adhesion of honeybee *** results of theoretical calculations and experiments indicated an enhanced adhesive mechanism of the honeybee by liquid self-sucking effects and air-embolism *** these effects,normal and shear adhesion can be adjusted by controlling the proportion of liquid secretion and air pockets in the contact ***,the air-embolism effects contribute to the optimal coupling of smaller normal adhesion with greater shear adhesion,which is beneficial for the high stride frequency of *** works can provide a fresh perspective on the development of bio-inspired wet adhesive surfaces.

关键词： honeybee arolium air pockets wet adhesion a three-phase interface self-sucking effects air-embolism effects