检索结果-南通市图书馆

Journal of Rare Earths 1999年第2期17卷 52-56页

作者： Liu, Y yang, xg Wu, Y Chinese Acad Sci Changchun Inst Appl Chem Changchun 130022 Peoples R China

Two series of layered mixed oxides La4BaCu5-xMxO13+(M=Mn, Co, x=05) were prepared and characterized by means of XRD, XPS, O2TPD and chemical analysis. The results show that their structures are 5layered ABO3 perovskite, and the XPS and O2TPD investigation confirms that there exists synergistic effect between Cu ion and M when M ion is doped into the lattice of La4BaCu5O13+, and the synergistic effect between Mn and Cu is stronger than that of CuCo.

关键词： Rare earths Layered mixed oxides Synergistic effect Active oxygen species

Zr-Cr-Ni BASED MULTICOMPONENT METAL HYDRIDE ELECTRODES

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1997年第3期7卷 2-7页

作者： yang, xg Lei, YQ Chen, YL Wang, QD ZHEJIANG UNIV DEPT MAT SCI & ENGNHANGZHOU 310027PEOPLES R CHINA

ＺｒＣｒＮｉＢＡＳＥＤＭＵＬＴＩＣＯＭＰＯＮＥＮＴＭＥＴＡＬＨＹＤＲＩＤＥＥＬＥＣＴＲＯＤＥＳ①ＹａｎｇＸｉａｏｇｕａｎｇ，ＬｅｉＹｏｎｇｑｕａｎ，ＣｈｅｎＹａｎｇｌｉｎ，ＷａｎｇＱｉｄｏｎｇＤｅｐａｒｔｍｅｎｔ... 详细信息

ＺｒＣｒＮｉＢＡＳＥＤＭＵＬＴＩＣＯＭＰＯＮＥＮＴＭＥＴＡＬＨＹＤＲＩＤＥＥＬＥＣＴＲＯＤＥＳ①ＹａｎｇＸｉａｏｇｕａｎｇ，ＬｅｉＹｏｎｇｑｕａｎ，ＣｈｅｎＹａｎｇｌｉｎ，ＷａｎｇＱｉｄｏｎｇＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃ...

关键词： Zr based hydride electrodes alloying effect electrochemical discharge capacity cyclic stability self discharge properties

Catalytic oxidation of cyclohexene to cyclohexanone by a triple system in acidic aqueous acetonitrile medium

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 1997年第6期15卷 512-527页

作者： Li, HM Ye, XK yang, xg Wu, Y Chinese Acad Sci Changchun Inst Appl Chem Changchun 130022 Jilin Peoples R China

The catalytic oxidation of cyclohexene to cyclohexanone using Pd(OAc)(2)/HQ/FePc was investigated in an acidic aqueous solution of acetonitrile. The role of each component of this system in the oxidation of cyclohexene was explored by means of UV-VIS, IR, XPS spectroscopy and. cyclic voltammetry, respectively. Based on the experimental results, the mechanism of the oxidation of cyclohexene catalyzed by Pd(OAc)(2)/HQ/FePc was elucidated.

关键词： cyclohexene oxidation cyclohexanone hydroquinone Pd(OAc)(2) iron phthalocyanine

Y-Ba-Cu-O mixed oxides for production of diphenols in liquid-solid phase

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 1996年第6期14卷 516-524页

作者： Liu, CB Zhao, Z yang, xg Ye, XK Wu, Y CHINESE ACAD SCI CHANGCHUN INST APPL CHEMCHANGCHUN 130022JILINPEOPLES R CHINA

Superconductor mixed oxides were often used as catalysts at higher temperature in gas phase oxidations, and considered not suitable for lower temperature reactions in the liquid-solid phase; here the catalysis of YBa2Cu3O7+/-x and Y2BaCuO5+/-x in the phenol hydroxylation at lower temperature with H2O2 as oxygen donor was studied, and found that the superconductor YBa2Cu3O7+/-x, has no catalytic activity for phenol hydroxylation, but Y2BaCuO5+/-x does, even has better catalytic activity and stability than most previously reported ones. With the studies of catalysis of other simple metal oxides and perovskite-like mixed oxides, a radical substitution mechanism is proposed and the experimental facts are explained clearly, and draw a conclusion that the perovskite-like mixed oxides with (AO)(ABO(3)) and (AO)2(ABO(3)) structure have better catalytic activity than the simple perovskite oxides with (ABO(3))(3) structure alone, and (AO) structure unit is the key for the mixed oxides to have the phenol hydroxylation activity. No pollution of this process is very important for its further industrial application.

关键词： superconductor mixed oxides phenol hydroxylation radical substitution

ELECTRODE PERFORMANCES OF MELT-SPINNED AB_2 TYPE Zr-BASED HYDROGEN STORAGE ALLOYS

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1998年第4期8卷 75-78页

作者： yang, xg Shu, KY Zhang, XB Lei, YQ Wang, QD Zhang, WK Lu, GL Zhejiang Univ Dept Mat Sci & Engn Hangzhou 310027 Peoples R China Zhejiang Univ Technol Dept Appl Chem Hangzhou 310014 Peoples R China Hangzhou Univ Cent Lab Hangzhou 310028 Peoples R China

１ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓａｓｕｍｅｄｔｈａｔｔｈｅｅｌｅｃｔｒｏｃｈｅｍｉｃａｌｐｒｏｐｅｒｔｉｅｓｄｅｐｅｎｄｏｎｂｏｔｈｔｈｅｃｈｅｍｉｃａｌｃｏｍｐｏｓｉｔｉｏｎａｎｄｔｈｅｍｉｃｒｏｓｔｒｕｃｔｕ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓａｓｕｍｅｄｔｈａｔｔｈｅｅｌｅｃｔｒｏｃｈｅｍｉｃａｌｐｒｏｐｅｒｔｉｅｓｄｅｐｅｎｄｏｎｂｏｔｈｔｈｅｃｈｅｍｉｃａｌｃｏｍｐｏｓｉｔｉｏｎａｎｄｔｈｅｍｉｃｒｏｓｔｒｕｃｔｕｒｅｏｆｈｙｄｒｏｇｅｎｓｔｏｒａ...

关键词： Zr based hydrogen storage alloy rapid solidification electrode performances

STUDIES　ON　THE　NON－ISOTHERMAL　KINETICS　OF　THERMAL　DECOMPOSITIONS　OF　THE　COMPLEXES　OF　Cd（II）WITH　O－VANILLIN　THIOSEMICARBAZONE　AND　IRON（III）WITH　2－［（O－HYDROXYBENZYLIDENE）AMINO］PHENOL　AND　PYRIDINE

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1995年第7期6卷 637-640页

作者： Hu, QP Cui, xg yang, ZH Shandong Univ Dept Chem Jinan 250100 Peoples R China Shandong Univ Inst Crystal Mat Jinan 250100 Peoples R China

The thermal decompositions of the complex of Cd(II) with o-vanillin thiosemicarbazone (complex 1) and the mixed ligand complex of iron (III) with 2-[(o-hydroxybenzylidene)amino] phenol and pyridine (complex 2) and their non-isothermal kinetics have been studied by TG and DTG *** non-isothermal kinetic data were analyzed and the kinetic parameters for the first and second steps of the thermal decompositions were evaluated by twodifferent methods -- differential and integral methods. Their kinetic equatiolls were obtained.

关键词： III IRON THIOSEMICARBAZONE AMINO AND

Nanoparticles for the treatment of spinal cord injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第6期20卷 1665-1680页

作者： Qiwei yang Di Lu Jiuping Wu Fuming Liang Huayi Wang Junjie yang Ganggang Zhang Chen Wang Yanlian yang Ling Zhu Xinzhi Sun Department of Orthopedic Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijingChina University of Chinese Academy of Sciences BeijingChina Department of Neurosurgery The First Affiliated Hospital of Chongqing Medical UniversityChongqingChina

Spinal cord injuries lead to significant loss of motor, sensory, and autonomic functions, presenting major challenges in neural regeneration. Achieving effective therapeutic concentrations at injury sites has been a slow process, partly due to the difficulty of delivering drugs effectively. Nanoparticles, with their targeted delivery capabilities, biocompatibility, and enhanced bioavailability over conventional drugs, are garnering attention for spinal cord injury treatment. This review explores the current mechanisms and shortcomings of existing treatments, highlighting the benefits and progress of nanoparticle-based approaches. We detail nanoparticle delivery methods for spinal cord injury, including local and intravenous injections, oral delivery, and biomaterial-assisted implantation, alongside strategies such as drug loading and surface modification. The discussion extends to how nanoparticles aid in reducing oxidative stress, dampening inflammation, fostering neural regeneration, and promoting angiogenesis. We summarize the use of various types of nanoparticles for treating spinal cord injuries, including metallic, polymeric, protein-based, inorganic non-metallic, and lipid nanoparticles. We also discuss the challenges faced, such as biosafety, effectiveness in humans, precise dosage control, standardization of production and characterization, immune responses, and targeted delivery in vivo. Additionally, we explore future directions, such as improving biosafety, standardizing manufacturing and characterization processes, and advancing human trials. Nanoparticles have shown considerable progress in targeted delivery and enhancing treatment efficacy for spinal cord injuries, presenting significant potential for clinical use and drug development.

关键词： antioxidants axon regeneration biocompatible materials drug carriers nanoparticles nerve regeneration neuroinflammatory diseases neuroprotection spinal cord injury stem cells

C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 pathway as a therapeutic target and regulatory mechanism for spinal cord injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2231-2244页

作者： Xiangzi Wang Xiaofei Niu Yingkai Wang yang Liu Cheng yang Xuyi Chen Zhongquan Qi School of Medicine Guangxi UniversityNanningGuangxi Zhuang Autonomous RegionChina Graduate School of Tianjin University of Traditional Chinese Medicine TianjinChina Characteristic Medical Center of People’s Armed Police Forces TianjinChina Fujian Maternity and Child Health Hospital FuzhouFujian ProvinceChina

Spinal cord injury involves non-reversible damage to the central nervous system that is characterized by limited regenerative capacity and secondary inflammatory *** expression of the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis exhibits significant differences before and after *** studies have revealed that the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis is closely associated with secondary inflammatory responses and the recruitment of immune cells following spinal cord injury,suggesting that this axis is a novel target and regulatory control point for *** review comprehensively examines the therapeutic strategies targeting the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis,along with the regenerative and repair mechanisms linking the axis to spinal cord ***,we summarize the upstream and downstream inflammatory signaling pathways associated with spinal cord injury and the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 *** review primarily elaborates on therapeutic strategies that target the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis and the latest progress of research on antagonistic drugs,along with the approaches used to exploit new therapeutic targets within the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis and the development of targeted ***,there are presently no clinical studies relating to spinal cord injury that are focusing on the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 *** review aims to provide new ideas and therapeutic strategies for the future treatment of spinal cord injury.

关键词： apoptosis C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 pathway C-C motif chemokine receptor 2 antagonists chemokine ligand 2 chemokine receptor 2 inflammation macrophage microglia spinal cord injury therapeutic method

Retrospective analysis of pathological types and imaging features in pancreatic cancer: A comprehensive study

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2025年第1期17卷 121-129页

作者： yang-Gang Luo Mei Wu Hong-Guang Chen Pathology Department Xuanhan County People’s HospitalDazhou 636150Sichuan ProvinceChina

BACKGROUND Pancreatic cancer remains one of the most lethal malignancies worldwide,with a poor prognosis often attributed to late *** the correlation between pathological type and imaging features is crucial for early detection and appropriate treatment *** To retrospectively analyze the relationship between different pathological types of pancreatic cancer and their corresponding imaging *** We retrospectively analyzed the data of 500 patients diagnosed with pancreatic cancer between January 2010 and December 2020 at our *** types were determined by histopathological examination of the surgical spe-cimens or biopsy *** imaging features were assessed using computed tomography,magnetic resonance imaging,and endoscopic *** analyses were performed to identify significant associations between pathological types and specific imaging *** There were 320(64%)cases of pancreatic ductal adenocarcinoma,75(15%)of intraductal papillary mucinous neoplasms,50(10%)of neuroendocrine tumors,and 55(11%)of other rare *** imaging features were identified in each pathological *** ductal adenocarcinoma typically presents as a hypodense mass with poorly defined borders on computed tomography,whereas intraductal papillary mucinous neoplasms present as characteristic cystic lesions with mural *** tumors often appear as hypervascular lesions in contrast-enhanced *** analysis revealed significant correlations between specific imaging features and pathological types(P<0.001).CONCLUSION This study demonstrated a strong association between the pathological types of pancreatic cancer and imaging *** findings can enhance the accuracy of noninvasive diagnosis and guide personalized treatment approaches.

关键词： Pancreatic cancer Pathological types Imaging features Retrospective analysis Diagnostic accuracy

Exosomes:the next-generation therapeutic platform for ischemic stroke

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

Neural Regeneration Research 2025年第5期20卷 1221-1235页

作者： Wenjing Yin Hongyin Ma yang Qu Jiaxin Ren Yingying Sun Zhen-Ni Guo Yi yang Stroke Center Department of NeurologyFirst Hospital of Jilin UniversityChangchunJilin ProvinceChina Neuroscience Research Center Department of NeurologyFirst Hospital of Jilin UniversityChangchunJilin ProvinceChina

Current therapeutic strategies for ischemic stroke fall short of the desired objective of neurological functional ***,there is an urgent need to develop new methods for the treatment of this *** are natural cell-derived vesicles that mediate signal transduction between cells under physiological and pathological *** have low immunogenicity,good stability,high delivery efficiency,and the ability to cross the blood–brain *** physiological properties of exosomes have the potential to lead to new breakthroughs in the treatment of ischemic *** rapid development of nanotechnology has advanced the application of engineered exosomes,which can effectively improve targeting ability,enhance therapeutic efficacy,and minimize the dosages *** in technology have also driven clinical translational research on *** this review,we describe the therapeutic effects of exosomes and their positive roles in current treatment strategies for ischemic stroke,including their antiinflammation,anti-apoptosis,autophagy-regulation,angiogenesis,neurogenesis,and glial scar formation reduction ***,it is worth noting that,despite their significant therapeutic potential,there remains a dearth of standardized characterization methods and efficient isolation techniques capable of producing highly purified *** optimization strategies should prioritize the exploration of suitable isolation techniques and the establishment of unified workflows to effectively harness exosomes for diagnostic or therapeutic applications in ischemic ***,our review aims to summarize our understanding of exosome-based treatment prospects in ischemic stroke and foster innovative ideas for the development of exosome-based therapies.

关键词： blood–brain barrier electroacupuncture engineering exercise exosomes ischemic stroke mesenchymal stem cells microglia neuroprotection stents