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Well-defined bis(phenolate) lanthanide methoxides as efficient initiators for the polymerization of cyclic carbonate and lactide

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Chinese Science Bulletin 2007年第12期52卷 1623-1628页

作者： XU XiaoPing YAO YingMing ZHANG Yong shen Qi Key Laboratory of Organic Synthesis of Jiangsu Province Department of Chemistry and Chemical Engineering Dushu Lake Campus Suzhou University Suzhou 215123 China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

Lanthanide methoxides supported by carbon-bridged bis(phenolate) ligands 2,2′-methylene-bis(6-tert- butyl-4-methylphenoxo) (MBMP2-) [(MBMP)Ln( μ-OMe)(THF)2]2 (Ln = Nd (1), Yb (2)) were synthesized in high yields by the protolysis reaction using (C5H5)3Ln(THF) as starting materials, and complex 1 was structurally characterized. The coordination geometry around the center metal can be best described as a distorted octahedron. Complexes 1 and 2 were shown to be efficient initiators for the ring-opening polymerization of 2,2-dimethyltrimethylene carbonate (DTC) and L-lactide. The mechanism of DTC polymerization was explored by the end group analysis of the oligomer.

关键词：稀土元素甲醇盐二苯酚盐配体丙交酯碳酸盐聚合物

黑枸杞花青素联合人脂肪源性血管外膜细胞支持脐血造血干/祖细胞的增殖

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中国组织工程研究 2025年第1期29卷 58-64页

作者：申娅媚牛云霞杨婷婷马洁胡代宏郑波宁夏医科大学临床医学院宁夏回族自治区银川市750004 宁夏回族自治区干细胞与再生医学重点实验室宁夏回族自治区银川市750004 宁夏医科大学总医院宁夏神经系统疾病诊疗工程技术研究中心宁夏回族自治区银川市750004 宁夏医科大学总医院血液内科宁夏回族自治区银川市750004

背景:黑枸杞花青素(Anthocyanins in Lycium ruthenicum Murr,ALRM)是黑枸杞中重要的活性成分之一,具有抗氧化、免疫调节等功效。人脂肪源性血管外膜细胞(CD146^(+)hAD-PCs)是骨髓间充质干细胞的前体细胞,在体外具有促进造血干/祖细胞... 详细信息

背景:黑枸杞花青素(Anthocyanins in Lycium ruthenicum Murr,ALRM)是黑枸杞中重要的活性成分之一,具有抗氧化、免疫调节等功效。人脂肪源性血管外膜细胞(CD146^(+)hAD-PCs)是骨髓间充质干细胞的前体细胞,在体外具有促进造血干/祖细胞增殖与分化的功能。ALRM联合CD146^(+)hAD-PCs对脐血造血干/组细胞的体外支持作用有待于研究。目的:探讨ALRM联合CD146^(+)hAD-PCs对脐血CD34^(+)造血干/祖细胞体外扩增的支持作用。方法:CCK-8法检测不同质量浓度ALRM(0,200,400,600,800,1000 mg/L)对CD146^(+)hAD-PCs增殖的影响;流式细胞术检测ALRM对CD146^(+)hAD-PCs细胞周期的影响。共培养实验分为空白组、ALRM组、CD146^(+)hAD-PCs组、ALRM+CD146^(+)hAD-PCs组,分析ALRM联合CD146^(+)hAD-PCs对脐血CD34^(+)造血干/祖细胞的体外支持作用。共培养1,2,4周,比较扩增后细胞数量、集落形成单位数量,流式细胞仪检测细胞免疫表型,ELISA检测细胞因子水平。结果与结论:(1)ALRM质量浓度为200 mg/L时,CD146^(+)hAD-PCs活力最高,CD146^(+)hAD-PCs的G_(0)/G_(1)期细胞比例下降,S期、G_(2)/M期细胞比例上升(P<0.01)。(2)脐血CD34^(+)造血干/祖细胞数量变化:在共培养1,2,4周时ALRM+CD146^(+)hAD-PCs组高于ALRM组(P均<0.05),在共培养2,4周时ALRM+CD146^(+)hAD-PCs组高于CD146^(+)hAD-PCs组(P均<0.05),ALRM组与空白组随着共培养时间延长细胞数量逐渐减少。(3)集落形成能力及免疫表型分析:在共培养1,2周时ALRM+CD146^(+)hAD-PCs组的集落形成单位数量高于CD146^(+)hAD-PCs组和ALRM组(P均<0.05);在共培养1,2,4周时ALRM+CD146^(+)hAD-PCs组CD45^(+)、CD34^(+)CD33^(-)细胞比例高于CD146^(+)hAD-PCs组(P均<0.01)。(4)细胞因子变化:在共培养4周时ALRM+CD146^(+)hAD-PCs组的白细胞介素2水平高于ALRM组、CD146^(+)hAD-PCs组(P<0.05);在共培养2,4周时ALRM+CD146^(+)hAD-PCs组白细胞介素3水平高于CD146^(+)hAD-PCs组(P<0.05);在共培养1周时ALRM+CD146^(+)h AD-PCs组的粒细胞集落刺激因子水平高于CD146^(+)hAD-PCs组,在共培养2周时高于ALRM组、CD146^(+)hAD-PCs组(P<0.01);在共培养1,2,4周时ALRM组、ALRM+CD146^(+)hAD-PCs组的干扰素γ水平低于CD146^(+)hAD-PCs组(P<0.05)。(5)由于空白组无基质细胞,脐血CD34^(+)造血干/祖细胞在共培养1周之后就无法计数,未进行免疫表型、集落分析和细胞因子检测。(6)结果表明:ALRM可以通过促进CD146^(+)hAD-PCs增殖和细胞周期转化进而促进脐血CD34^(+)造血干/祖细胞的体外扩增,在造血干细胞移植研究方面具有重要价值。

关键词：黑枸杞花青素人脂肪源性血管外膜细胞脐血造血干/祖细胞共培养体外扩增

Ionic iron(III) complex of aryloxo-linked bis(imidazolium)cations: efficient and recyclable catalyst for aryl Grignard cross-coupling of alkyl chlorides

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Chinese Science Bulletin 2014年第34期59卷 4728-4734页

作者： Qingling Zhang Zhuang Li Hongmei Sun Qi shen Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and MaterialsScience Soochow University

A novel phenol-linked bis(imidazolium) salt,H3LCl2(L = O-4-C(CH3)3-C6H2-2,6-di[CH2{C(NCHCHNAr)}]2, Ar = 2,6-diisopropylphenyl, 1), was designed and used to prepare an ionic iron(III) complex [H2L][Fe Cl4](2).Complex 2 was a highly efficient catalyst for aryl Grignard cross-coupling of alkyl chlorides bearing ***, complex 2 was reusable and could be reused in at least eight times without significant loss in catalytic activity.

关键词：高效催化剂交叉偶联铁(Ⅲ) 阳离子烷基氯咪唑基格络合物

Studies on the amide compounds ofMirabilis. Jalapa. L

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Chemical Research in Chinese Universities 2001年第Z1期17卷 38-39页

作者： shen XuWei College of chemistry and Chemical Engineering Northwest Normal University

Mirabilis himalaica(Edgew.)Heinerl Var. Chinensis Heimerl belonging to the genus Mirabilis are used in chinese medicine as a remedy for various diseases[1].Its chemical constituents,however, have not been reported so far. we have carried out a detailed chemical investigatigation of the seeds and have isolated two new amides along with three known compounds.The known compounds were identified by comparing their spectral data with those of authentic samples or with those reported in literature as daucosterol[2], bsitoserol[2], boeravinone E[3], in the present note, the structural elucidation of two new amides is reported.

关键词： structural elucidation chemical constituents chinese medicine spectral data used in

Model Predictive Control Strategy of Multi-Port Interline DC Power Flow Controller

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Energy Engineering 2023年第10期120卷 2251-2272页

作者： He Wang Xiangsheng Xu Guanye shen Bian Jing Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education(Northeast Electric Power University)Jilin132012China Marketing Department State Grid Jilin Electric Power Co.Ltd.Changchun130061China

There are issues with flexible DC transmission system such as a lack of control freedom over power *** order to tackle these issues,a DC power flow controller(DCPFC)is incorporated into a multi-terminal,flexible DC power *** recent years,a multi-port DC power flow controller based on a modular multi-level converter has become a focal point of research due to its simple structure and robust *** work proposes a model predictive control(MPC)strategy for multi-port interline DC power flow controllers in order to improve their steady-state dynamic ***,the mathematical model of a multi-terminal DC power grid with a multi-port interline DC power flow controller is developed,and the relationship between each regulated variable and control variable is determined;The power flow controller is then discretized,and the cost function and weight factor are built with numerous control *** module sorting method and nearest level approximation modulation regulate the power flow controller;Lastly,theMATLAB/Simulink simulation platformis used to verify the correctness of the establishedmathematicalmodel and the control performance of the suggestedMPC ***,it is demonstrated that the control strategy possesses the benefits of robust dynamic performance,multiobjective control,and a simple structure.

关键词： DC power flow controller model predictive control modular multi-level converter control strategy dynamic performance

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5例宫颈微偏腺癌的临床分析

癌症 2008年第12期27卷 1310-1314页

作者：常洁张莘周晖梁金晓林仲秋中山大学附属第二医院妇瘤科广东广州510120

背景与目的:宫颈微偏腺癌(minimal deviation adenocarcinoma of cervix,MDA)是一种罕见疾病,误诊率较高,尚无规范的治疗方法。本研究旨在分析总结MDA的临床病理特点,以提高对该病的认识。方法:回顾性分析中山大学附属第二医院1991年1月... 详细信息

背景与目的:宫颈微偏腺癌(minimal deviation adenocarcinoma of cervix,MDA)是一种罕见疾病,误诊率较高,尚无规范的治疗方法。本研究旨在分析总结MDA的临床病理特点,以提高对该病的认识。方法:回顾性分析中山大学附属第二医院1991年1月至2006年12月诊治的5例MDA患者的临床病理资料。结果:5例患者的中位年龄47岁(38～59岁)。主要临床表现为大量稀薄粘液性白带、阴道不规则出血等。MDA在组织学上表现为腺体分化好,镜下难与宫颈内膜的正常腺体相区别,但浸润深度超过正常宫颈腺体的深度。免疫组化示2例患者癌胚抗原(CEA)和P53阳性。4例患者接受手术治疗,其中手术+放疗1例,手术+化疗+放疗3例;1例不能手术的患者接受了姑息性放疗。随访6～88个月,无失访病例,2例无瘤生存的患者中有1例无瘤生存时间超过5年,3例死于肿瘤复发转移。结论:MDA的诊断主要依靠临床表现和腺体浸润深度超过正常宫颈腺体深度的病理特点,以手术为主的综合治疗可能是治疗MDA的较好方法。

关键词：宫颈肿瘤微偏腺癌诊断治疗预后

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低温氧漂活化剂的制备与应用

东华大学学报（自然科学版） 2012年第6期38卷 721-726页

作者：倪中秀沈华沈丽朱泉安徽职业技术学院纺织工程系安徽合肥230011 广东德美精细化工股份有限公司广东佛山528305 东华大学化学化工与生物工程学院上海201620

为解决纯棉针织物练漂温度高、能耗大等问题,制备了能用于低温漂白的锰配合物MnⅡ(L)(ClO4)2(其中L为1,4,7,10-四氮杂环十二烷),并研究了双氧水用量、配合物浓度、NaOH用量、练漂温度和练漂时间共5个工艺因素对漂白效果的影响.通过单因... 详细信息

为解决纯棉针织物练漂温度高、能耗大等问题,制备了能用于低温漂白的锰配合物MnⅡ(L)(ClO4)2(其中L为1,4,7,10-四氮杂环十二烷),并研究了双氧水用量、配合物浓度、NaOH用量、练漂温度和练漂时间共5个工艺因素对漂白效果的影响.通过单因素试验和正交试验,得到优化的工艺条件:DM-1361用量为0.5g/L,DM-1408用量为1g/L,H2O2(35%)用量为8g/L,NaOH用量为6g/L,配合物浓度为20μmol/L,练漂温度为70℃,练漂时间为50min,浴比为1:10.结果表明:低温优化工艺整理后织物的白度和毛效略差于传统工艺,但达到服用要求;顶破强力与织物失重率均优于传统工艺.

关键词：锰配合物棉针织物低温漂白

Effects of Calcium and Yttrium on Microstructure and Mechanical Properties of High Strain-Rate Rolled AZ91D Magnesium Alloy

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Journal of Donghua University(English Edition) 2018年第2期35卷 149-153页

作者： shen Yanjin Hunan Automobile Engineering Professional College Zhuzhou 412001 China

Effects of calcium( Ca) and yttrium( Y) on microstructure and mechanical properties of high strain-rate rolled AZ91 D magnesium alloy were studied. High strain-rate rolling can improve the strength and plasticity of magnesium alloy *** of Ca and Y into AZ91 D can refine grains and modify the size and the distribution of the precipitated phases. After solution treatment( 418 ℃ and 20 h) and high strain-rate rolling( heating at420 ℃ for 10 min firstly and then rolling from 10 mm to 2 mm in thickness via a single pass),the tensile strength of the AZ91 D-0. 2%Ca alloy was 1. 3% higher than that of the AZ91 D-0. 4 D%Y alloy,and the tensile strength of the AZ91 D-0. 2%Ca-0. 4%Y alloy was about 8. 3% and 6. 9% higher than those of the AZ91 D-0. 4%Y and the AZ91 D-0. 2%Ca alloys respectively.

关键词： high strain-rate rolling magnesium alloy microstructure mechanical properties tensile strength grain size

A Report on E-C Translation of HK Facility Agreement

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A Report on E-C Translation of HK Facility Agreement

作者： shen Yashuang 东南大学

学位级别：硕士

本文是一篇基于《港币贷款融通协议》英汉翻译的实践报告,选自上海律通翻译有限公司委托任务的后半部分,译文约1,1000字中文。原文属于法律文本类型,其语言特点为法律及金融术语占比大、句式冗长复杂、内容艰涩难懂。委托方要求译文用... 详细信息

本文是一篇基于《港币贷款融通协议》英汉翻译的实践报告,选自上海律通翻译有限公司委托任务的后半部分,译文约1,1000字中文。原文属于法律文本类型,其语言特点为法律及金融术语占比大、句式冗长复杂、内容艰涩难懂。委托方要求译文用词准确、译文完整、行文通顺、条理清楚。本报告共分为六个部分:第一部分是任务描述,介绍任务的背景和意义;第二部分描述翻译过程,介绍译前平行文本的研读、翻译辅助工具的准备、译中注意事项和译后审校工作;第三部分是文本分析,从词、句、风格三个方面分析《港币贷款融通协议》的特点;第四部分是理论依据,介绍“功能对等理论”的原则和对本协议英译的指导意义;第五部分是案例分析,从词、句、风格三个方面叙述翻译技巧以及翻译方法;第六部分是总结,归纳笔者在翻译过程中获得的经验和教训。针对《港币贷款融通协议》的实际翻译过程中所遇到的问题,笔者对该文本所采用的翻译技巧和方法做出如下总结。在词汇层面上,对专业术语采用借助专业术语词典进行标准化翻译;对法律配对词采取直译;对多义词采取意译。在句法层面上,针对长难句采用了长句拆分和语序调整;针对被动句采取主动转被动的方法。在文体风格层面上,针对古体词和固定句式等协议范式的特点,笔者采取增译和使用对应中文表达等方法实现文体对等。通过运用上述翻译技巧和策略,笔者有效地解决了《港币贷款融通协议》翻译过程中遇到的问题,也较好地实现了文本的词汇对等、句子对等和风格对等。

关键词：《港币贷款融通协议》法律文本功能对等理论英汉翻译报告