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Synthesis of Heterometallic Rare Earth(Ⅲ)-Cobalt(Ⅱ)Complexes and Their Application in Alternating Copolymerization of Cyclohexene Oxide and Carbon Dioxide

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Chinese Journal of Chemistry 2023年第7期41卷 805-813页

作者： Yanping Song Kuan Yin Yongjie Chen Bei Zhao Yong Zhang Xuehua Zhu dan yuan Yingming Yao Key Laboratory of Organic Synthesis of Jiangsu Province State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsCollege of ChemistryChemical Engineering&Materials ScienceDushu Lake CampusSoochow UniversitySuzhouJiangsu215123 China Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis SuzhouJiangsu215123 China Suzhou Industrial Park Institute of Services and Outsourcing SuzhouJiangsu215123 China School of Chemistry and Life Science Suzhou University of Science and TechnologySuzhouJiangsu215009 China

Comprehensive Summary Four heterometallic rare earth(Ⅲ)-cobalt(Ⅱ)complexes(rare earth=Y(1),Sm(2),Nd(3),La(4))stabilized by an o-phenylenediamine-bridged tris(phenolato)ligand(L)have been synthesized and *** these tetranuclear complexes,one polydentate L coordinates to one rare earth(Ⅲ)ion,and one cobalt(Ⅱ)ion,respectively,while two rare earth ions are bridged by four acetate *** complexes were applied in the copolymerization of cyclohexene oxide and CO_(2),which showed good activity(TON up to 440)and high poly(cyclohexene carbonate)selectivity(>99%).Kinetic studies determined the equation as rate=k[CHO]1[CO_(2)]0[initiator]1,which proves a first-order dependence on initiator concentrations and implies a synergistic mechanism with rare earth and cobalt ions cooperating in epoxide ring-opening and chain propagation.

关键词： Carbon dioxide Rare earth metal Heterometallic complexes Poly(cyclohexene carbonate) Crystal structure

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课程思政在病理学教学中的应用与探索

中国继续医学教育 2024年第10期16卷 181-185页

作者：袁丹姚晋杨晓荣王进京梁娜遵义医科大学附属医院病理科贵州遵义563000 遵义医科大学第一临床学院病理学教研室贵州遵义563000 遵义医科大学基础医学院组织学与胚胎学教研室贵州遵义563000

新时代背景下,为了落实立德树人的根本任务,对医学院校的思想政治教育工作提出了更高的要求。立足学科课程特点基础上,加强医学生思政教育,全面推进课程思政建设是首要途径。文章在充分把握病理学学科特点、教学大纲及培养目标的基础上... 详细信息

新时代背景下,为了落实立德树人的根本任务,对医学院校的思想政治教育工作提出了更高的要求。立足学科课程特点基础上,加强医学生思政教育,全面推进课程思政建设是首要途径。文章在充分把握病理学学科特点、教学大纲及培养目标的基础上,通过深挖病理教学过程中的思政元素、建设系统的病理学课程思政的教学体系、培养专业的课程思政教师队伍,同时改变病理学传统“填鸭式”等教学方法,提出和应用以问题为基础的教学模式(problem-based learning,PBL),以案例为基础的教学模式(case-based learning,CBL)、翻转课堂、微信网络平台及直播平台等新的教学方法,将思政元素结合一定的教学方法和教辅工具(如实验室标本)润物细无声地融入病理学课堂,既能提高学生学习的主动性和积极性,同时也能达到对医学生思想政治的教育的目的,从而培养三观正、专业知识扎实、医德好的新时代医学精英,努力推动教学的改革与创新。

关键词：课程思政病理学学科特点立德树人以案例为基础的教学模式翻转课堂

Difluoromethyl phenoxathiinium salt: A new general and versatile difluoromethylating reagent with divergent ·CF_(2)H, CF_(2)H^(+), and :CF_(2) reactivities

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Science China Chemistry 2024年第3期67卷 953-962页

作者： yuan-Qing Gu Hong-Xin Long dan-dan Zhang Mei-Feng Ruan Guo-Kai Liu School of Pharmacy Shenzhen University Medical SchoolShenzhen UniversityShenzhen 518055China

Development of practical and versatile electrophilic difluoromethylating reagent is still a grand challenge so far due to its inherent instability or low ***,we report the design and synthesis of difluoromethyl phenoxathiinium tetrafluoroborate(PT-CF_(2)H^(+)BF_(4)^(-)) as a novel difluoromethylating reagent,which proves to be a bench-stable,general,powerful and versatile reagent with divergent·CF_(2)H,CF_(2)H^(+),and:CF_(2) *** use of this reagent,we demonstrated a vast array of difluoromethyl radical transfer reactions via diverse pathways involving photocatalyst-free visible-light induction,visible-light photoredox catalysis and visible-light mediation single electron transfer of EDA ***,the green and highly effective CF_(2)H^(+) and:CF_(2) transfer reactions were also readily accomplished.

关键词： difluoromethyl phenoxathiinium salt versatile difluoromethylating reagent difluoromethyl radical difluoromthyl cation difluorocarbene

Bimetallic amine-bridged bis(phenolate) lanthanide aryloxides and alkoxides: synthesis, characterization, and application in the ring-opening polymerization of rac-lactide and rac-β-butyrolactone

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Science China Chemistry 2014年第8期57卷 1106-1116页

作者： NIE Kun FENG Tao SONG FengKui ZHANG Yong SUN HongMei yuan dan YAO YingMing SHEN Qi Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials ScienceSoochow University School of Chemistry and Chemical Engineering Taishan University

A series of neutral bimetallic lanthanide aryloxides p-C6H4[OLnL(THF)n]2 [Ln = Y(1), Yb(2), Sm(3)(n = 1) and La(4)(n = 2), L = Me2NCH2CH2N{CH2-(2-O–C6H2–tBu2-3,5)}2] and alkoxides p-C6H4CH2[OLnL(THF)]2 [Ln = Y(5), Yb(6)] supported by an amine-bridged bis(phenolate) ligand have been synthesized through one-pot reactions of Ln(C5H5)3(THF), LH2 with p-benzenediol and 1,4-benzenedimethanol, respectively. All complexes have been fully characterized by elemental analyses, single-crystal X-ray diffraction analysis, and IR and multi-nuclear NMR spectroscopy(in the cases of 1, 4 and 5). Study of their catalytic behavior revealed that, in general, all complexes are efficient initiators for the polymerization of rac-lactide(LA) and rac-β-butyrolactone(BBL), except for 3 and 4 in the case of BBL. The influence imposed by lanthanides of different ionic radii and initiating groups of different structures on the activity, controllability, and stereoselectivity of polymerization were systematically studied and compared. Highly heterotactic PLA(Pr up to 0.99) and syndiotactic PHB(Pr ≈ 0.81) with high molecular weight and narrow polydispersity formed and were automatically capped with hydroxyl functionality at both ends.

关键词： amine-bridged bis(phenolate) ligand bimetallic lanthanide aryloxides and alkoxides ring-opening polymerization,stereoselectivity

Isolation and Identification of Two New Polyhydroxylated Sterols from Soft Coral Sinularia sp.

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Chemical Research in Chinese Universities 2011年第2期27卷 217-220页

作者： LIAO Xiao-jian TANG Li-dan LIANG yuan-wei GENG Hua-wei XU Shi-hai Department of Chemistry Jinan University Guangzhou 510632 P. R. China

Two new polyhydroxysteroids, 12β,16β,20-trihydroxycholesta-1,4-dien-3-one 16-acetate（1） and 24- methyl-12β,16β,20-trihydroxycholesta-1,4-dien-3-one（2） were isolated from octocoral Sinularia sp. Their structures were elucidated primarily on the basis of 1D and 2D NMR and the mass spectroscopic studies. The cytotoxicity of these compounds against three tumor cell lines was also reported.

关键词： Sinularia sp. Polyhydroxysteroid Cytotoxic activity

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不同分子量核桃肽在小鼠体内分布的初步探究

食品与药品 2024年第3期26卷 243-247页

作者：牛林林陈勉李溢真袁丹丹李帅广袁嘉丽羊忠山吴月滢刘峰刘飞山东省药学科学院山东省生物药物重点实验室山东省多糖类药物工程实验室多糖类药物发酵与精制国家地方联合工程实验室山东济南250101 山东大学齐鲁医学院药学院山东济南250012 山东第一医科大学第一附属医院(山东省千佛山医院)山东省风湿免疫病转化医学重点实验室山东济南250014 云南中医药大学云南昆明650500 山东省生物医药科学院有限公司山东济南250101

目的制备相对分子质量(M_(r))不同的核桃肽,并初步探究核桃肽经Cy7标记后在小鼠体内分布情况。方法利用不同酶降解核桃粕制备核桃肽,GPC色谱法测定核桃肽M_(r),利用Cy7标记的核桃肽进行小鼠活体成像,观察其在小鼠体内的分布情况。结果... 详细信息

目的制备相对分子质量(M_(r))不同的核桃肽,并初步探究核桃肽经Cy7标记后在小鼠体内分布情况。方法利用不同酶降解核桃粕制备核桃肽,GPC色谱法测定核桃肽M_(r),利用Cy7标记的核桃肽进行小鼠活体成像,观察其在小鼠体内的分布情况。结果不同酶酶解得到的样品M_(r)占比不同,样品Ⅰ小分子量成分占比高,收率高,通过Cy7标记不同样品在小鼠体内呈现不同的荧光强度,Cy7-样品Ⅰ在脑部显现荧光信号,Cy7-样品Ⅱ和Cy7-样品Ⅲ仅在接受注射的尾部显现强荧光信号。结论不同酶制备的核桃肽在小鼠体内呈现不同的分布,样品Ⅰ中可能含有增强脑部荧光的肽段。

关键词： Cy7 核桃肽相对分子质量荧光强度

Track-Pattern-Based Characteristics of Extratropical Transitioning Tropical Cyclones in the Western North Pacific

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Advances in Atmospheric Sciences 2024年第6期41卷 1251-1263页

作者： Hong HUANG dan WU yuan WANG Zhen WANG Yu LIU College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410000China No.31631 Army of PLA Huizhou 516000China School of Atmospheric Sciences and Key Laboratory of Mesoscale Severe Weather/Ministry of Education Nanjing 210023China No.93721 Army of PLA Shuozhou 038300China

Based on the Regional Specialized Meteorological Center(RSMC)Tokyo-Typhoon Center best-track data and the NCEP-NCAR reanalysis dataset,extratropical transitioning(ET)tropical cyclones(ETCs)over the western North Pacific(WNP)during 1951–2021 are classified into six clusters using the fuzzy c-means clustering method(FCM)according to their track *** characteristics of the six hard-clustered ETCs with the highest membership coefficient are *** tropical cyclones(TCs)that were assigned to clusters C2,C5,and C6 made landfall over eastern Asian countries,which severely threatened these *** landfalling TCs,93.2%completed their ET after landfall,whereas 39.8%of ETCs completed their transition within one *** frequency of ETCs over the WNP has decreased in the past four decades,wherein cluster C5 demonstrated a significant decrease on both interannual and interdecadal timescales with the expansion and intensification of the western Pacific subtropical high(WPSH).This large-scale circulation pattern is favorable for C2 and causes it to become the dominant track pattern,owning to it containing the largest number of intensifying ETCs among the six clusters,a number that has increased insignificantly over the past four *** surface roughness variation and three-dimensional background circulation led to C5 containing the maximum number of landfalling TCs and a minimum number of intensifying *** results will facilitate a better understanding of the spatiotemporal distributions of ET events and associated environment background fields,which will benefit the effective monitoring of these events over the WNP.

关键词： Western North Pacific tropical cyclone extratropical transition fuzzy c-means clustering method

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基于模糊综合评价的电动汽车充电安全风险评估

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计算机测量与控制 2024年第4期32卷 300-307页

作者：赵公豪刘鸿鹏袁单陈良亮窦真兰东北电力大学电气工程学院现代电力系统仿真控制与绿色电能新技术教育部重点实验室吉林吉林132012 南瑞集团(国网电力科学研究院)有限公司南京211106 国网上海市电力公司上海200433

为了定量评估电动汽车充电过程中的安全水平,对电动汽车充电过程中诱发充电安全事故的因素进行了分析,并采用模糊综合评价方法设计了电动汽车充电安全风险评估方案;提出了一种综合赋权的方法来改进灰色关联度主观赋权存在的指标权重不... 详细信息

为了定量评估电动汽车充电过程中的安全水平,对电动汽车充电过程中诱发充电安全事故的因素进行了分析,并采用模糊综合评价方法设计了电动汽车充电安全风险评估方案;提出了一种综合赋权的方法来改进灰色关联度主观赋权存在的指标权重不确定的问题,保证了评估结果的合理性与可靠性;首先统计分析指标诱发充电事故的频率获得客观权重,然后经过基于灰色关联度的专家经验判断得到主观权重,最后通过标准离差求出主观权重与客观权重的分配系数;该方法既保留了主观权重中专家的权威性,又充分体现了数据本身所具有的客观特征;其次,将充电安全划分为5个等级并且设定合理的阈值,构建梯形分布的隶属度函数;经过对某充电站充电数据的分析,验证了该风险评估方案的可行性和正确性。

关键词：模糊综合评价充电安全指标评价体系灰色关联度

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Jade Buddha Statues Witness Friendship Ties Between Yangzhou and Yangon of Myanmar

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Voice of Friendship 2013年第4期 25-26页

作者： yuan dan

In Myanmar,Buddhism is widely *** tens of thousands of public temples,there is a shrine for worship in almost every family *** average income families,they usually have a painted image of Buddha or a wooden Buddha;rich households,however,have gold,silver or jade Buddha *** statues are the most difficult to make,but their delicate and lustrous texture,are most precious.

关键词： Myanmar texture silver precious income delegation