检索结果-南通市图书馆

Deliberate design of MOF-based pre-catalyst rationalizing the structural reconstruction toward efficient oxygen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Yunhui Chen meng Tian Zhongqi Zhang Guangzhao Wang Yan Guo Jing wu Dawei Qi Zhenhua Yan Xiangyu Liu Xi Liu State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia University Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing School of Electronic Information Engineering Yangtze Normal University Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) State Key Laboratory of Advanced Chemical Power Sources College of Chemistry Nankai University School of Chemistry and Chemical Engineering In-situ Center for Physical Sciences Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University

Metal-organic frameworks （MOFs）,that have emerged as promising electrocatalysts in oxygen evolution reaction （OER）,usually undergo structural reconstruction to form metal hydroxides as active ***,it remains a great challenge to design and synthesize ideal MOF-based pre-catalysts for properly cognizing and utilizing the reconstruction process toward efficient OER ***,the well-defined MOF-808 is post-modified by 2-hydroxyphosphonoacetic acid （HPAA） to form a micro-adsorber that enables to capture of metal ions ***3+and Ni2+ions are synergistically anchored into the microadsorber,developing a Fe/Ni-containing pre-catalyst that can be dynamically electrooxidized to be an active and stable dual-site electrocatalyst denoted by R-MOF-HPAA@FeNi with abundant metal *** a result,R-MOF-HPAA@FeNi exhibits an excellent OER performance with a low overpotential of 272 mV and Tafel slope of 35.9 m V dec-1,as well as long-term stability over 300 h at 10 m A *** and theoretical calculations suggest the resulting catalyst mainly follows a lattice oxygen mechanism （LOM） of dual-metal-site mechanism （DMSM）.Owing to the chelating role of HPAA,the post-synthesized MOF-HPAA behaves as a trap to uniformly and firmly adhere Fe3+and Ni2+ions,leading to a functionalized MOF-based pre-catalyst which can be structurally evolved into atomic level-distributed OER electrocatalysts.

关键词：

Force and impulse multi-sensor based on flexible gate dielectric field effect transistor

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 214-220页

作者： chao Tan Junling Lü Chunchi Zhang Dong Liang Lei Yang Zegao Wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang 050081China

Nowadays,force sensors play an important role in industrial production,electronic information,medical health,and many other ***-dimensional material-based filed effect transistor(2D-FET)sensors are competitive with nano-level size,lower power consumption,and accurate ***,few of them has the capability of impulse detection which is a path function,expressing the cumulative effect of the force on the particle over a period of *** we fabricated the flexible polymethyl methacrylate(PMMA)gate dielectric MoS_(2)-FET for force and impulse sensor *** systematically investigated the responses of the sensor to constant force and varying forces,and achieved the conversion factors of the drain current signals(I_(ds))to the detected impulse(I).The applied force was detected and recorded by I_(ds)with a low power consumption of~30 *** sensitivity of the device can reach~8000%and the 4×1 sensor array is able to detect and locate the normal force applied on ***,there was almost no performance loss for the device as left in the air for two months.

关键词： flexible gate dielectric transistor force sensor impulse sensor force sensor array

在线全文

学校读者我要写书评

暂无评论

半肝血流完全阻断无血肝切除术的临床研究

中华外科杂志 2007年第3期45卷 186-188页

作者：杨甲梅童颖谢峰徐峰阚彤沈伟峰吴孟超第二军医大学东方肝胆外科医院特需治疗科上海200438

目的探讨半肝血流完全阻断下无血肝切除术的临床意义。方法对两组各14例原发性肝癌患者分别施行半肝血流完全阻断无血肝切除术(A 组)和全肝入肝血流阻断肝切除术(B组),比较两组患者术中肝血流阻断时间、术中出血量、肝切除体积、术后肝... 详细信息

目的探讨半肝血流完全阻断下无血肝切除术的临床意义。方法对两组各14例原发性肝癌患者分别施行半肝血流完全阻断无血肝切除术(A 组)和全肝入肝血流阻断肝切除术(B组),比较两组患者术中肝血流阻断时间、术中出血量、肝切除体积、术后肝功能恢复情况、并发症发生率等指标。结果两组在肝血流阻断时间和肝切除体积无显著差异的条件下,A 组的术中出血量平均为(296±240)ml,B 组平均为(582+497)ml,两组比较差异有统计学意义(P0.05)。结论半肝血流完全阻断无血肝切除术能显著减少肝切除术中出血量及肝功能损害。

关键词：肝切除术肝细胞癌肝功能试验

在线全文

学校读者我要写书评

暂无评论

肿瘤干细胞:起源与争论

中国肿瘤生物治疗杂志 2007年第6期14卷 501-504页

作者：钱其军刘佳吴孟超第二军医大学东方肝胆外科医院上海200438

近年来,随着干细胞理论在肿瘤研究中的广泛应用,人们逐渐认识到在绝大多数癌症中,肿瘤细胞很可能起源于一种肿瘤起始细胞———肿瘤干细胞,它在机体内具有自我更新并形成肿瘤的能力。肿瘤干细胞的存在已在多种肿瘤类型与细胞系中得到证... 详细信息

近年来,随着干细胞理论在肿瘤研究中的广泛应用,人们逐渐认识到在绝大多数癌症中,肿瘤细胞很可能起源于一种肿瘤起始细胞———肿瘤干细胞,它在机体内具有自我更新并形成肿瘤的能力。肿瘤干细胞的存在已在多种肿瘤类型与细胞系中得到证实,并鉴定出相应的分选方法,但人们对它的起源却莫衷一是,干细胞突变、细胞融合、胚胎干细胞残留等都有可能是肿瘤干细胞产生的原因。通过多年对肝癌的研究,笔者提出肝癌干细胞来源的假说:认为干细胞在修复肝炎病毒所致肝损伤的过程中,在病毒与炎症的双重刺激下,干细胞与突变肝细胞之间发生细胞融合、交换,最终产生肝癌干细胞。随着相关研究的不断深入,肿瘤干细胞学说在理论与技术上也面临着诸多质疑与挑战,其中有观点认为,干细胞可能只是被趋化至癌变部位并因其可塑性而表现出恶变表型,但并未在实质上参与肿瘤的发生与发展。

关键词：肿瘤干细胞肝癌干细胞基因突变细胞融合静止胚胎干细胞

CD4^+CD25^+调节性T细胞在肿瘤免疫中的作用

在线全文

学校读者我要写书评

暂无评论

中国肿瘤 2005年第11期14卷 729-732页

作者：陈中严以群吴孟超第二军医大学东方肝胆外科医院上海200438

CD4+CD25+调节性T(Tr)细胞是CD4+调节性T细胞的一个重要亚群,具有免疫低反应性和免疫抑制性两大功能特征,其作用机制可能是通过细胞间直接接触和/或分泌抑制性细胞因子。在维持机体免疫内环境稳定、防止自身免疫性疾病发生、诱导移植耐... 详细信息

CD4+CD25+调节性T(Tr)细胞是CD4+调节性T细胞的一个重要亚群,具有免疫低反应性和免疫抑制性两大功能特征,其作用机制可能是通过细胞间直接接触和/或分泌抑制性细胞因子。在维持机体免疫内环境稳定、防止自身免疫性疾病发生、诱导移植耐受以及调节肿瘤免疫方面都起着重要作用。文章就该类细胞的研究近况及其在调节肿瘤免疫方面的作用作一综述。

关键词： CD4^+CD25^+调节性T细胞肿瘤免疫

在线全文

学校读者我要写书评

暂无评论

肝移植治疗原发性肝细胞癌的进展

中国肿瘤 2005年第3期14卷 145-147页

作者：傅晓辉吴孟超第二军医大学东方肝胆外科医院上海200438

肝移植已经成为治疗肝癌的重要手段。选择合适的病人是一个重要的问题,国际通行的是米兰标准,我国一般公认的适应证主要包括:合并有肝硬变失代偿、不能接受肝切除治疗的小肝癌患者和肿瘤多发且波及左右两叶、肝功能严重损害、行切除术... 详细信息

肝移植已经成为治疗肝癌的重要手段。选择合适的病人是一个重要的问题,国际通行的是米兰标准,我国一般公认的适应证主要包括:合并有肝硬变失代偿、不能接受肝切除治疗的小肝癌患者和肿瘤多发且波及左右两叶、肝功能严重损害、行切除术后肿瘤容易复发或出现肝功能衰竭者。血管侵犯,细胞分化程度等因素可以影响治疗的预后。围手术期辅助治疗(经皮肝动脉化学栓塞、经皮无水酒精瘤内注射、射频消融,氩氦刀治疗)对于提高肝移植的疗效有一定的意义。

关键词：肝肿瘤肝移植肝细胞癌

Preparation and Performance of Ternary Early Strength Agent and Quercetin Composite Cement Sealing Material

在线全文

学校读者我要写书评

暂无评论

Journal of wuhan University of Technology(Materials Science) 2025年第1期40卷 130-140页

作者： LIU Jian CHEN Meiting JI Xiaoli XU chao WANG Chunmei Department of Safety Science and Engineering Anhui University of Science and TechnologyHuainan 232001China Key Laboratory of Mine Safety and High Efficient Mining Jointly Built by Province and Education Ministry Anhui University of Science and TechnologyHuainan 232001China Department of Chemical Engineering and Explosives Anhui University of Science and TechnologyHuainan 232001China

A ternary early-strengthening agent consisting of calcium formate+triethanolamine+lithium sulfate was compounded with quercetin to shorten the setting time of cementitious materials while ensuring their early *** optimum ratio of the three early-strengthening agents was determined as 0.5%calcium formate+0.04%triethanolamine+0.4%lithium sulfate by response surface *** effects of the ternary early-strengthening agent composed of calcium formate+triethanolamine(TEA)+lithium sulfate on cementitious pore sealing materials under the synergistic effect of quercetin were studied by means of the performance tests of compressive strength,fluidity,and setting time,and the microstructural characterizations of X-ray powder diffractometer(XRD),thermogravimetry(TG-DSC)and scanning electron microscopy(SEM).The study shows that the synergistic effect of ternary early-strengthening agent and quercetin forms a multi-performance composite admixture for cementitious *** best performance was obtained with the compounding scheme of 0.5%calcium formate+0.04%triethanolamine+0.4%lithium sulfate ternary early-strengthening agent and 0.05%*** compressive strength of 1,3,7,and 28 d are 94.8%,39.8%,42%,and 28%higher than those of the blank group,*** initial time and final setting time are 41 and 57 minutes,*** to the microscopic analysis,the network and fibrous C-S-H gels generated by ternary early-strengthening agents are attached to the surface promoted by quercetin,which forms skeleton support while thickening and solidifying the cement slurry,which enhances the early compressive strength of the cement-based materials.

关键词： sealing material ternary early-strengthening agent quercetin synergetic effect response surface methodology

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

经导管肝动脉化疗栓塞术后并发肝内胆管损伤

中华普通外科杂志 2010年第7期25卷 566-568页

作者：梁军杨业发葛乃建申淑群伍路吴孟超第二军医大学附属东方肝胆外科医院放射介入一科上海200438

目的探讨肝脏恶性肿瘤经导管肝动脉化疗栓塞术后并发肝内胆管损伤的影像学表现及临床诊治方法.方法收集2007年9月至2009年3月因肝脏恶性肿瘤行经导管肝动脉化疗栓塞术1302例的临床资料,术前影像学检查均无明显胆道异常,观察术后肝内... 详细信息

目的探讨肝脏恶性肿瘤经导管肝动脉化疗栓塞术后并发肝内胆管损伤的影像学表现及临床诊治方法.方法收集2007年9月至2009年3月因肝脏恶性肿瘤行经导管肝动脉化疗栓塞术1302例的临床资料,术前影像学检查均无明显胆道异常,观察术后肝内胆管影像学征象及临床表现.结果 6例经导管肝动脉化疗栓塞术后随访1至3个月出现肝内胆管损伤,其中2例出现黄疸、高热等胆道梗阻、感染症状,采用经皮经肝胆道穿刺引流术后症状缓解其余4例仅有影像学改变,无明显临床症状.结论肝内胆管损伤是经导管肝动脉化疗栓塞术后少见的并发症,诊断依赖于临床表现及影像学检查,经皮经肝胆道穿刺引流术是有症状的肝内胆管损伤的有效治疗方式.

关键词：胆管疾病栓塞治疗性手术后并发症肝肿瘤

[Determination of eight phthalate metabolites in urine of pregnant women and evaluation of neonatal birth outcomes based on solid-phase extraction-high performance liquid chromatography-tandem mass spectrometry]

在线全文

学校读者我要写书评

暂无评论

Se pu = Chinese journal of chromatography 2025年第1期43卷 60-67页

作者： Zi-Hao Wang meng-Fei Xu Bei-Ni Li Ping wu Wei wu Hubei University of Chinese Medicine Wuhan 430065 China.

Phthalates (PAEs) are endocrine-disrupting chemicals that are widely present in everyday life and enter the human body through various pathways. The release of PAEs into the environment through pathways that include leaching, evaporation, abrasion, and the use of personal care products exposes humans to PAEs via ingestion, inhalation, and dermal absorption. Pregnant women, as a particularly vulnerable population, risk adverse newborn growth and development when exposed to PAEs. While the concentrations of PAEs in urine reflect recent exposure levels in humans, urinary levels of phthalate metabolites (mPAEs) are commonly used as biomarkers of internal exposure owing to the relatively short biological half-lives of PAEs (<24 h). In this study, we developed a solid-phase extraction-high performance liquid chromatography-tandem mass spectrometry (SPE-HPLC-MS/MS) method for simultaneously detecting eight mPAEs in the urine of pregnant women. Urine samples were enzymatically hydrolyzed with -glucosidase and then purified using the Bond Elut Plexa SPE column, with subsequent elution, concentration, and redissolved performed prior to HPLC-MS/MS. Separation was achieved using an Agilent Eclipse Plus C18 column (100 mm×3 mm, 3.5 μm), with gradient elution performed using 0.1% acetic acid aqueous solution and 0.1% acetic acid acetonitrile as mobile phases. Multiple reaction monitoring (MRM) mode was used for detection, with quantification performed using the internal-standard method. Good linearities were obtained in the range of 0.1-200 ng/mL for the eight mPAEs, with limits of detection (LODs) and quantification (LOQs) of 0.015-0.048 and 0.050-0.160 ng/mL, respectively. The eight mPAEs exhibited recoveries of 80.2%-99.7% at three spiked levels (1, 10, and 50 ng/mL). This method was subsequently used to analyze the eight mPAEs levels in urine samples of 497 pregnant women from the Ezhou Maternity and Child Health Care Hospital. The participants exhibited widespread exposure t

关键词： birth outcomes high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) phthalate metabolites (mPAEs) urine samples of pregnant women