检索结果-南通市图书馆

Internal reorganization energy in heterogeneous intermolecular electron transfer

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第18期42卷 1530-1535页

作者： Guo, JX zhang, qy CHINESE ACAD SCI INST CHEMSTATE KEY LAB STRUCT CHEM UNSTABLE & STABLE SPECIBEIJING 100080PEOPLES R CHINA

ELECTRON transfer (ET) reaction is concerned with many important processes in chemistry and biology, and has become an active research field in recent years. According to Marcus’s theory, the ET rate can be expressed... 详细信息

关键词： electron transfer internal reorganization energy AM1 method germinate radical ion pair.

Discovery of virus pathogen from soft-shelled turtle Trionyx sinesis

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第6期42卷 503-507页

作者： zhang, qy Li, ZQ Jiang, YL Liang, SC Gui, JF Institute of Hydrobiology Chinese Academy of Sciences Wuhan China

THE soft-shelled turtle Trionyx sinesis, because of its nutritional and medicinal values,

关键词： virus pathogen soft-shelled turtle viral structure polypeptide.

羟基磷灰石复合骨形态发生蛋白2人工骨的理论及其应用特征

在线全文

学校读者我要写书评

暂无评论

中国组织工程研究与临床康复 2007年第26期11卷 5207-5210页

作者：张麒云范存义上海交通大学附属第六人民医院骨科上海市200233

目的:系统回顾当前国内外关于骨形态发生蛋白2复合羟基磷灰石人工骨的研究进展。资料来源:应用计算机检索Pubmed 1965-01/2007-03关于骨形态发生蛋白2符合羟基磷灰石人工骨的文章。检索词“BMP-2,hydroxyapatite”并限定文章的语言种类... 详细信息

目的:系统回顾当前国内外关于骨形态发生蛋白2复合羟基磷灰石人工骨的研究进展。资料来源:应用计算机检索Pubmed 1965-01/2007-03关于骨形态发生蛋白2符合羟基磷灰石人工骨的文章。检索词“BMP-2,hydroxyapatite”并限定文章的语言种类为English。同时利用计算机检索万方数据库2002-09/2005-07的相关文章,限定文章语言种类为中文,检索词“骨形态发生蛋白2,羟基磷灰石”。资料选择:纳入标准:①骨形态发生蛋白2复合羟基磷灰石人工骨的动物实验及临床运用。②骨形态发生蛋白2的分子生物学,成骨机制。③羟基磷灰石成骨作用。④能获取文章的全文。排除标准:①较陈旧文献。②重复性研究。资料提炼:共收集到50篇与骨形态发生蛋白2复合羟基磷灰石人工骨有关的文章,45篇符合纳入标准。其中研究内容相似的,以近7年发表在较权威杂志者优先。排除的15篇为较陈旧的文献及重复研究;对符合标准的30篇文献进行分析。资料综合:由于骨形态发生蛋白2弥散能力较强,单独植入体内会很快弥散被吸收,需要一种合适的载体吸附骨形态发生蛋白2,而羟基磷灰石具有与松质骨相类似的多孔支架结构,无抗原性,为理想的骨形态发生蛋白载体系统。虽然此种材料的应用尚处于实验阶段,但应用前景广阔,其必将成为具有主导性的人工骨材料。结论:生物组织工程学的发展,为骨缺损的修复提供了契机,也提出了挑战,即要求有一种生物相容性更好、又满足生物力学需要的载体材料。在这一方面骨形态发生蛋白2复合羟基磷灰石人工骨有着广阔的研究、开发前景。

关键词：骨形态发生蛋白2 羟基磷灰石人工骨

在线全文

学校读者我要写书评

暂无评论

人肝癌相关新基因LAPTM4B研究进展

世界华人消化杂志 2006年第18期14卷 1805-1809页

作者：孙丽张青云锦州医学院生化教研室辽宁省锦州市121001 北京大学临床肿瘤学院北京肿瘤医院检验科北京市100036

LAPTM4B是北京大学基础医学院细胞生物学教研室新近克隆的一个在肝细胞癌中高表达的新基因,具有癌基因特性．本文将对其发现过程、结构、理化性质、功能研究及其多态性与肿瘤的关系等方面进行初步总结．

关键词： LAPTM4B 肝细胞癌癌基因多态性

The posterior selection method for hyperparameters in regularized least squares method

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

Control Theory and Technology 2024年第2期22卷 184-194页

作者： Yanxin zhang Jing Chen Yawen Mao Quanmin Zhu School of Science Jiangnan UniversityWuxi214122JiangsuChina The Science and Technology on Near-Surface Detection Laboratory Wuxi214122JiangsuChina Department of Engineering Design and Mathematics University of the West of EnglandBristolBS161QYUK

The selection of hyperparameters in regularized least squares plays an important role in large-scale system identification. The traditional methods for selecting hyperparameters are based on experience or marginal likelihood maximization method, which are inaccurate or computationally expensive. In this paper, two posterior methods are proposed to select hyperparameters based on different prior knowledge (constraints), which can obtain the optimal hyperparameters using the optimization theory. Moreover, we also give the theoretical optimal constraints, and verify its effectiveness. Numerical simulation shows that the hyperparameters and parameter vector estimate obtained by the proposed methods are the optimal ones.

关键词： Regularization method Hyperparameter System identification Least squares algorithm

Facile synthesis of high-brightness green-emitting carbon dots with narrow bandwidth towards backlight display

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 Chemical Letters 2024年第5期35卷 277-282页

作者： Rui Cheng Tingting zhang Xin Huang Jian Yu State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China

High-performance carbon dots(CDs)allowing the application in high-end display devices are highly desirable and usually limited by the absence of simple and easy synthesis *** this work,we exploited an easy-to-implement strategy for the one-step synthesis of green-emitting CDs(G-CDs)with superb optical *** G-CDs were synthesized using m-phenylenediamine(m-PD)as a single precursor,and the reaction reacted at 180℃for 12 h The resultant G-CDs exhibit high-purity and excitationindependent green fluorescence with the photoluminescence(PL)peak located at 516 nm,full width at half maximum(FWHM)of 46 nm,and PL quantum yield(qy)of∼80%under the 470nm excitation *** G-CDs and corresponding composite film prepared with polyvinyl butyral(G-CDs@PVB)exhibit good PL stability after undergoing long-time storage for one year and 360 h exposure under 460nm blue *** G-CDs@PVB film was used as color-conversion materials in green-emitting light-emitting diode(LED)application,exhibiting a Commission internationale de l’Eclairage(CIE)chromaticity coordinate of(0.21,0.44).The film was also used in CD-based liquid crystal display(CD-LCD)application,achieving a color gamut value of 85%.This work will offer a working basis for the synthesis of high-performance CDs as well as their application in displays.

关键词： Carbon dots One-step synthesis Narrow bandwidth High quantum yield Display

Knee osteoarthritis:A review of animal models and intervention of traditional Chinese medicine

在线全文

学校读者我要写书评

暂无评论

Animal Models and Experimental Medicine 2024年第2期7卷 114-126页

作者： Xuyu Song Ying Liu Siyi Chen Lei zhang Huijie zhang Xianhui Shen Hang Du Rong Sun Orthopaedic trauma surgery The Second Hospital of Shandong UniversityJinanShandongChina Academy of Traditional Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjinChina Department of Traditional Chinese Medicine The Second Hospital of Shandong UniversityJinanShandongChina College of pharmacy Shandong University of Traditional Chinese MedicineJinanShandongChina The Second Clinical College of Shandong University Shandong UniversityJinanShandongChina Advanced Medical Research Institute Shandong UniversityJinanShandongChina The Second Hospital of Shandong University JinanShandongChina

Background:Knee osteoarthritis(KOA)characterized by degeneration of knee cartilage and subsequent bone hyperplasia is a prevalent joint condition primarily affecting aging *** pathophysiology of KOA remains poorly understood,as it involves complex mechanisms that result in the same ***,researchers are interested in studying KOA and require appropriate animal models for basic *** herbal compounds,which consist of multiple herbs with diverse pharmacological properties,possess characteristics such as multicomponent,multipathway,and multitarget *** potential benefits in the treatment of KOA continue to attract ***:This study aims to provide a comprehensive overview of the advantages,limitations,and specific considerations in selecting different species and methods for KOA animal *** will help researchers make informed decisions when choosing an animal ***:Online academic databases(e.g.,PubMed,Google Scholar,Web of Science,and CNKI)were searched using the search terms“knee osteoarthritis,”“animal models,”“traditional Chinese medicine,”and their combinations,primarily including KOA studies published from 2010 to ***:Based on literature retrieval,this review provides a comprehensive overview of the methods of establishing KOA animal models;introduces the current status of advantages and disadvantages of various animal models,including mice,rats,rabbits,dogs,and sheep/goats;and presents the current status of methods used to establish KOA animal ***:This study provides a review of the animal models used in recent KOA research,discusses the common modeling methods,and emphasizes the role of traditional Chinese medicine compounds in the treatment of KOA.

关键词： animal models knee osteoarthritis system review traditional Chinese medicine

外周血单个核细胞来源树突状细胞分泌细胞因子在过敏性紫癜急性期的变化

在线全文

学校读者我要写书评

暂无评论

中国组织工程研究与临床康复 2007年第37期11卷 7417-7420页

作者：王娟张秋业陈永兴董增义青岛大学医学院附属医院儿科山东省青岛市266003

目的:观察外周血单个核细胞来源的树突状细胞分泌白细胞介素水平在过敏性紫癜急性期的变化,分析其与Th亚群平衡的相关性。方法:实验于2006-10/2007-12在青岛大学医学院附属医院儿科研究所完成。①实验对象:取急性期过敏性紫癜患儿外周... 详细信息

目的:观察外周血单个核细胞来源的树突状细胞分泌白细胞介素水平在过敏性紫癜急性期的变化,分析其与Th亚群平衡的相关性。方法:实验于2006-10/2007-12在青岛大学医学院附属医院儿科研究所完成。①实验对象:取急性期过敏性紫癜患儿外周静脉血28份作为过敏性紫癜组,平均年龄7.53岁;以门诊体检的健康同龄儿童外周静脉血18份作为对照组。儿童家属均知情同意。②实验方法:采血2.0～3.0mL/份,肝素抗凝,离心移取血浆1mL冻存备测。采用密度梯度离心法获取外周血单个核细胞,调整细胞悬液浓度为2×109L-1,接种于24孔板向树突状细胞进行诱导培养。每孔加入含终浓度1000u/mL重组人粒细胞-巨噬细胞集落刺激因子、500u/mL重组人白细胞介素4的RPMI-1640完全培养液1mL,隔日添加1/2首次浓度的上述两种细胞因子,半量换液。培养至第6天,每孔加入重组人肿瘤坏死因子α至终浓度200u/mL。③实验评估:倒置显微镜观察树突状细胞的生长情况,以流式细胞仪检测成熟树突状细胞特异性表面分子CD83的表达率。采用ELISA法检测血浆干扰素γ、白细胞介素4的水平及培养上清中的白细胞介素10,12,18水平。结果:①树突状细胞体外诱导培养过程的形态学观察:外周血单个核细胞贴壁3h后获得黏附细胞,加入细胞因子24h后可见悬浮细胞增多,并呈细胞聚集现象,培养至第8天可见到大量具有毛刺状或根须状突起的悬浮细胞,即为树突状细胞。②树突状细胞的表型鉴定:过敏性紫癜组及对照组树突状细胞表面分子CD83均呈高表达,表达率分别为(69.29±16.20)%,(69.26±18.77)%。③Th亚群变化:与对照组比较,过敏性紫癜组白细胞介素4水平明显升高(t’=5.09,P<0.01),干扰素γ、干扰素γ/白细胞介素4水平均明显降低(t=4.26,P<0.01;t’=7.98,P<0.01)。④树突状细胞分泌细胞因子的水平:与对照组比较,过敏性紫癜组树突状细胞白细胞介素12水平明显降低(t=2.53,P<0.05),白细胞介素10,18水平均明显升高(t=2.07,P<0.05;t=2.10,P<0.05)。⑤树突状细胞分泌细胞因子水平与Th亚群平衡相关性分析:两组树突状细胞分泌白细胞介素12水平均与干扰素γ水平呈显著正相关(r=0.56～0.62,P均<0.01),与干扰素γ/白细胞介素4值呈正相关(r=0.51～0.52,P<0.01或0.05)。两组白细胞介素10,18水平均与白细胞介素4水平呈显著正相关(r=0.85～0.68,P均<0.01),与干扰素γ/白细胞介素4值呈负相关(r=-0.75～-0.49,P<0.01或0.05)。结论:过敏性紫癜患儿分泌白细胞介素12水平不足,而分泌白细胞介素10,18水平升高,提示过敏性紫癜患儿存在树突状细胞功能紊乱,且与Th1/Th2失衡关系密切。

关键词：过敏性紫癜树突状细胞白细胞介素干扰素γ 儿童

Easy-to-perform organic-solvent-free synthesis of carbon dots with strong green photoluminescence

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第3期35卷 373-378页

作者： Jiazhuang Guo Yifeng Chen Pan zhang Ge Li Xiaoning Yang Cai-Feng Wang Su Chen State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China

Carbon dots(CDs)have been extensively studied owing to their fascinating optical properties and wide potential ***,we report an easy-to-perform and organic-solvent-free synthesis strategy for green-emissive CDs(G-CDs)possessing high photoluminescence(PL)quantum yield(qy).The G-CDs are synthesized by heating the homogeneous precursors of citric acid and cyanamide in an open vessel,circumventing the use of organic solvents,complex operations,high-pressure reactors,and expensive instruments in the synthesis *** effect of various reaction variables on the formation and the optical properties of G-CDs are systematically *** resultant G-CDs show bright PL emission at 521 nm with PL qy up to 73%.Then a white light-emitting diode(LED)with Commission Internationable de L'Eclairage(CIE)coordinates of(0.33,0.34)and color rendering index(CRI)of 92 is constructed based on G-CDs/thermoplastic polyurethane(TPU)***,a visual microfluidic detection platform is designed by using G-CDs as fluorescent probes for rapid quantitative detection of Fe^(3+),Cu^(2+),and Mn^(2+)metal ions,which can realize synchronized testing of multiple *** study might promote the development and preparation methods of high-performance CDs with various optical applications.

关键词： Carbon dots Efficient synthesis Green fluorescence Quantum yield White LEDs Microfluidic detection platform