检索结果-南通市图书馆

Synthesis of Highly Stable Porous Metal-lminodiacetic Acid Gels from a Novel IDA Compound

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 Chemistry 2016年第6期34卷 617-623页

作者： Wenjing Chen Yanhong Jiang xuesong ding Chaoguo Yan Baohang Han College of Chemistry and Chemical Engineering Yangzhou University Yangzhou Jiangsu 225002 China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China

In this work, a novel and simple flexible aromatic multi-carboxylate compound N,N＇（4,4＇-biphenylyl） iminodi- acetic acid （BP-IDA） was synthesized, with which two new stable metaMDA gels （denoted as MIGl and MlG2） with three-dimensional network structures have been prepared successfully by employing Cr^3＋ and Al^3＋ as the metal ions, respectively. The rheological performance was investigated by means of dynamic rheology measurement. The morphology and microstructure were characterized by scanning electron microscopy, transmission elec- tron microscopy, and X-ray diffraction technique. Nitrogen sorption isotherm measurement suggests that the MlG1 aerogel has considerable porosity with the Brunauer-Emmett-Teller specific surface area up to 760 m^2·g^-1. Owing to easy preparation, good stability, and three-dimensional network structure, the as-prepared metal-organic gels will possess potential applications in separation, catalysis, and drug delivery.

关键词： iminodiacetic acid chromium(Ⅲ) ion aluminum(Ⅲ) ion metal-IDA gels porosity

Three-dimensional Covalent Organic Frameworks as Host Materials for Lithium-Sulfur Batteries

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 2020年第5期38卷 550-557,I0008页

作者： Zhen Li Hang-Yu Zhou Fu-Lai Zhao Tian-Xiong Wang xuesong ding Bao-Hang Han Wei Feng Chinese Academy of Sciences(CAS)Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China School of Materials Science and Engineering Tianjin UniversityTianjin 300072China University of Chinese Academy of Science Beijing 100049China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China

Two reported three-dimensional covalent organic frameworks(3D-COFs),COF-300 and COF-301,which have hierarchical porous structures and large pore volumes,were synthesized and employed as host materials for lithium-sulfur *** to possessing excellent porosities as well as abundant hydroxyl groups in the pore walls,COF-301 can not only trap lithium polysulfides(PSs)via physical adsorption inside the pores,but also capture PSs by chemical interactions to relieve the shuttle ***,it is the first time that 3D-COFs were utilized as host materials for lithium-sulfur batteries as well as hydroxyl groups were introduced into COFs for improving the battery *** a result,COF-301@S as cathode material could reserve the capacity of 411.6 mA·h·g^-1 after 500 cycles with only 0.081%fading per cycle at 0.5 C,exhibiting better battery performance compared with COF-300@*** study not only expands the applications of 3D-COFs but also provides a new route for designing lithium-sulfur batteries.

关键词： Three-dimensional covalent organic framework Flost material Lithium-sulfur battery Flydroxyl group Chemical interaction

Serum metabolomic profiling reveals potential biomarkers in assessing the management of women with polycystic ovary syndrome:a randomized controlled trial

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2022年第1期135卷 79-85页

作者： xuesong ding Yan Deng Yanfang Wang Wei Xue Shiyang Zhu Xiao Ma Ruilin Ma Aijun Sun Department of Obstetrics and Gynecology Peking Union Medical College HospitalPeking Union Medical CollegeChinese Academy of Medical SciencesBeijing 100730China

Background: As one of the most common endocrinal disorders for women at childbearing age, the diagnostic criteria of polycystic ovary syndrome (PCOS) have been defined differently among different international health organizations. Phenotypic heterogeneity of PCOS also brings about difficulties for its diagnosis and management assessment. Therefore, more efficient biomarkers representing the progression of PCOS are expected to be integrated into the monitoring of management process using metabolomic ***: In this prospective randomized controlled trial, 117 PCOS patients were enrolled from December 2016 to September 2017. Classical diagnostic parameters, blood glucose, and metabolome were measured in these patients before and at 2 months and 3 months of different medical interventions. The receiver operating characteristic (ROC) curves were built based on multivariate statistical analysis using data at baseline and 3 months’ management, and combinational biomarkers with appreciable sensitivity and specificity were selected, which then validated with data collected at 2 ***: A set of metabolites including glutamic acid, aspartic acid, 1-methylnicotinamide, acetylcarnitine, glycerophosphocholine, and oleamide were filtered out with high performance in representing the improvement through 3-month management of PCOS with high sensitivity and specificity in ROC analysis and validation with other two groups showed an appreciable area under the curve over ***: The six metabolites were representative of the remission of PCOS through medical intervention, making them a set of potential biomarkers for assessing the outcome of PCOS *** Registration: ***, NCT03264638.

关键词： Polycystic ovary syndrome Metabolomic approach Management evaluation Serum metabolomic

Design and synthesis of cobalt phthalocyanine based porous organic polymers for catalysis research

在线全文

学校读者我要写书评

暂无评论

Design and synthesis of cobalt phthalocyanine based porous o...

Impact of peri-operative venous thromboembolism on survival in patients with endometrial clear cell carcinoma:A 10-year single-institution retrospective study

中国化学会第四届卟啉与酞菁学术研讨会

作者： Si-Jie Yang xuesong ding Bao-Hang Han CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology University of Chinese Academy of Sciences

Over the past decade,interest in the field of porous organic polymers（POPs）,which have strong covalent linkages,light-weight elements,tunable pore parameter and designable porous structures,has grown tremendously because of their outstanding performance and broad *** previous work is focus on the design,synthesis and functional research of phthalocyanine based POPs with various performances in photoconductivity,singlet oxygen generation and iodine capture.[1] Here we constructed several kinds of cobalt phthalocyanine based porous organic polymers（CoPc-POPs） with different building ***-POPs possess excellent porosities,extended π-conjugation systems,and highly physicochemical *** relevant works on catalysis are ***,the rigid skeleton structure,in which metallophthalocyanines as catalytic sites distribute in ordered and separated,could avoid the catalysts deactivation due to the *** enrichment effects of their opening porous structures may also be beneficial to contacting efficiency of substrates and catalytic sites,and then improve the catalytic ***,using stable and insoluble porous materials as heterogeneous catalysts is favorable to the recovery and recycling of catalysts.

关键词： cobalt phthalocyanine porous organic polymers catalysis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Medical Journal 2024年第16期137卷 1979-1981页

作者： xuesong ding Yuan Li Dongyan Cao Xirun Wan Ming Wu Lingya Pan Junjun Yang Yang Xiang Department of Obstetrics and Gynecology Peking Union Medical College HospitalChinese Academy of Medical SciencesNational Clinical Research Center for Obstetric&Gynecologic DiseasesBeijing 100730China

To the Editor:Endometrial cancer(EC)is the sixth most common cancer diagnosed in women,and its prevalence is reportedly increasing *** clear cell carcinoma(ECCC)accounts for 2-5%of all EC,and is a rare but ominous subtype of high-risk EC that has a poorer prognosis and exhibits greater *** to the rarity of ECCC,few clinical trials have included patients with this disease exclusively,and limited data are available regarding its pathogenesis and clinical progression compared with other more common subtypes of EC.

关键词： patients clinical cancer

Porous organic polymers: a progress report in China

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2023年第3期66卷 620-682页

作者： Qing Hao You Tao xuesong ding Yajie Yang Jie Feng Rui-Lei Wang Xue-Ming Chen Guan-Le Chen Xiaomeng Li Huang OuYang XunLiang Hu Jia Tian Bao-Hang Han Guangshan Zhu Wei Wang Fan Zhang Bien Tan Zhan-Ting Li Dong Wang Li-Jun Wan Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education and Faculty of Chemistry Northeast Normal UniversityChangchun 130024China State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringLanzhou Magnetic Resonance CenterLanzhou UniversityLanzhou 730000China School of Chemistry and Chemical Engineering State Key Laboratory of Metal Matrix CompositesShanghai Electrochemical Energy Devices Research CenterShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China Department of Chemistry Fudan UniversityShanghai 200438China University of Chinese Academy of Sciences Beijing 100049China

Porous organic polymers(POPs) are porous materials composed of light elements such as C, H, N, and O. The benign characters,including large surface area, good physical and chemical stability, well-defined chemical composition, wide ranges of monomer selection, and strong designability, have made POPs one of the frontiers in materials research. In this review, we discussed the design and synthesis of various POP materials that mainly led by Chinese scientists, including conjugated microporous polymers(CMPs), porous aromatic frameworks(PAFs), and hypercrosslinked porous polymers(HCPs), as well as crystalline POPs comprised of covalent organic frameworks(COFs) and a special class of COFs with triazine rings, covalent triazine frameworks(CTFs), and supramolecular organic frameworks(SOFs), and sorted out their main applications in adsorption, separation,catalysis, and electrochemistry fields.

关键词： Porous porous frontier

在线全文

学校读者我要写书评

暂无评论

复杂背景下的票据字符类型识别方法

现代电子技术 2020年第8期43卷 44-48页

作者：陈湘孙章丁雪凇西华大学四川成都610039 西华大学电气与电子信息学院四川成都610039

由于银行规定用户需用黑色碳素笔填写票据中信息,但实际操作中存在信息填写不规范现象。针对这种情况,提出一种自动识别用户书写字符类型的算法。该算法首先识别字符颜色,并根据字符在红外图像下是否存在,对字符类型进行粗分类;其次,选... 详细信息

由于银行规定用户需用黑色碳素笔填写票据中信息,但实际操作中存在信息填写不规范现象。针对这种情况,提出一种自动识别用户书写字符类型的算法。该算法首先识别字符颜色,并根据字符在红外图像下是否存在,对字符类型进行粗分类;其次,选择正面红外和正面彩色图像中较清晰的图像作为字符分割的原图像,分别采用阈值法和改进的连通域分析方法对票据正面红外和正面彩色图像中的字符做分割;再次,根据字符笔墨颜色和形体特征,对字符进行颜色判定、基于阈值法的粗细判定、基于位置关系的手写体或打印体判定;最后,设计字符类型识别器,准确识别字符类型。经过实际银行票据图像测试,相比于现有方法,该文采用的方法不损坏票据样本,能够准确地识别出银行票据中的字符类型,具有较好的应用前景和商业价值。

关键词：银行票据字符字符类型识别字符分割字符颜色判定识别器设计图像测试