检索结果-南通市图书馆

Differentiation of the Agonists and Antagonists of the α7 Nicotinic Acetylcholine Receptor

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2019年第5期18卷 1193-1198页

作者： wu guanzhao XU Qingliang BAO Yilei LIU Yuwei LI Qian FANG Zhengyu FU Jingyi DING Yuhang LIANG Zhiqing JIANG Tao YU Rilei Key Laboratory of Marine Drugs Chinese Ministry of EducationSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology Qingdao 266003China

Theα7 nicotinic acetylcholine receptors(nAChRs)are widely expressed in the central and peripheral nervous systems and are important drug targets for the treatment of neurological ***,differentiation of the agonists and antagonists of the nAChR is *** this study we aimed to develop a reliable and efficient computational approach for differentiation of the agonists from the antagonists of the nAChR based on a systematical analysis of 123 ligands(87 agonists,12 partial agonists,and 24 antagonists)binding with the extracellular domain of theα7 n AChR *** results suggest that the ligand size and ligand binding affinity cannot differentiate the agonists from the antagonists of the *** ligand efficiency that considers both ligand binding affinity and size for the agonists is overall more left shifted in comparison to the antagonists,but the values of the ligand efficiency still cannot differentiate the agonists from the antagonists unless the values are either relatively high(more than-0.3 kcal mol^-1)or relatively low(less than-0.45 kcal mol^-1).Our results suggest that accurate prediction of the agonist or antagonist of the nAChR is challenging and the ligand innate configuration has to be considered as an extra for differentiation of the agonists from the antagonists of the nAChR.

关键词： nicotinic acetylcholine receptors ligand efficacy ligand binding affinity ligand efficiency

Enantioselective assembly of multi-layer 3D chirality

在线全文

学校读者我要写书评

暂无评论

National Science Review 2020年第3期7卷 588-599页

作者： guanzhao wu Yangxue Liu Zhen Yang Tao Jiang Nandakumar Katakam Hossein Rouh Liulei Ma Yao Tang Sultan Ahmed Anis U.Rahman Hongen Huang Daniel Unruh Guigen Li Institute of Chemistry and Bio Medical Sciences School of Chemistry and Chemical EngineeringNanjing University Department of Chemistry and Biochemistry Texas Tech University School of Medicine and Pharmacy Ocean University of China

The first enantioselective assembly of sandwich-shaped organo molecules has been achieved by conducting dual asymmetric Suzuki-Miyaura couplings and nine other reactions. This work also presents the first fully C-C anchored multi-layer 3 D chirality with optically pure enantiomers. As confirmed by X-ray diffraction analysis that this chiral framework is featured by a unique C2-symmetry in which a nearly parallel fashion consisting of three layers: top, middle and bottom aromatic rings. Unlike the documented planar or axial chirality, the present chirality shows its top and bottom layers restrict each other from free rotation, i.e., this multi-layer 3 D chirality would not exist if either top or bottom layer is removed. Nearly all multi-layered compounds showed strong luminescence of different colors under UV irradiation, and several randomly selected samples displayed aggregation-induced emission(AIE) properties. This work is believed to have broad impacts on chemical, medicinal and material sciences including optoelectronic materials in future.

关键词： multi-layer 3D chirality organo sandwich chirality C2-symmetry multi-layered organic framework(M-LOF) architecture chirality aggregation-induced emission(AIE)

Triple-Columned and Multiple-Layered 3D Polymers:Design,Synthesis,Aggregation-Induced Emission(AIE),and Computational Study

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Research 2021年第1期2021卷 112-124页

作者： guanzhao wu Yangxue Liu Zhen Yang Liulei Ma Yao Tang Xianliang Zhao Hossein Rouh Qixuan Zheng Peng Zhou Jia-Yin Wang Farhan Siddique Sai Zhang Shengzhou Jin Daniel Unruh Adelia JAAquino Hans Lischka Kristin M.Hutchins Guigen Li Department of Chemistry and Biochemistry Texas Tech UniversityLubbockTexas 79409-1061USA Institute of Chemistry and Biomedical Sciences School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China School of Pharmaceutical Sciences and Technology Tianjin UniversityTianjin 300072China Department of Mechanical Engineering Texas Tech UniversityLubbockTX 79409USA

Conjugated polymers and oligomers have great potentials in various fields,especially in materials and biological sciences because of their intriguing electronic and optoelectronic *** recent years,the through-space conjugation system has emerged as a new assembled pattern of multidimensional ***,a novel series of structurally condensed multicolumn/multilayer 3D polymers and oligomers have been designed and synthesized through one-pot Suzuki polycondensation(SPC).The intramolecularly stacked arrangement of polymers can be supported by either X-ray structural analysis or computational *** all cases,polymers were obtained with modest to good yields,as determined by GPC and 1 ***-TOF analysis has proven the speculation of the step-growth process of this *** computational study of ab initio and DFT calculations based on trimer and pentamer models gives details of the structures and the electronic *** results of optical and AIE research confirmed by calculation indicates that the present work would facilitate the research and applications in materials.

关键词： properties transition materials

Multilayer 3D Chirality and Its Synthetic Assembly

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

Research 2019年第1期2019卷 822-832页

作者： guanzhao wu Yangxue Liu Zhen Yang Nandakumar Katakam Hossein Rouh Sultan Ahmed Daniel Unruh Kazimierz Surowiec Guigen Li Institute of Chemistry and BioMedical Sciences School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China Department of Chemistry and Biochemistry Texas Tech UniversityLubbockTX 79409-1061USA

3D chirality of sandwich type of organic molecules has been *** key element of this chirality is characterized by three layers of structures that are arranged nearly in parallel fashion with one on top and one down from the center *** enantiomers of these molecules have been fully characterized by spectroscopies with their enantiomeric purity measured by chiral *** absolute confguration was unambiguously assigned by X-ray difraction *** is the frst multilayer 3D chirality reported and is anticipated to lead to a new research area of asymmetric synthesis and catalysis and to have a broad impact on chemical,medicinal,and material sciences in future.

关键词： purity absolute sandwich

In silico design of anti-tumor mini-protein targeting MDM2

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 2023年第5期34卷 256-258页

作者： Jinghui Zhang Huixin Xu Baishi Wang Xuekai Zhang Lei Fu Yannan Li guanzhao wu Zitong Zhao Lu Liu Ting Yang Zheyu Zhang Jinbo Yang Tao Jiang Peiju Qiu Rilei Yu Key Laboratory of Marine Drugs Chinese Ministry of EducationSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China Innovation Center for Marine Drug Screening&Evaluation Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266003China Department of Biological Engineering College of Chemical and Biological EngineeringShandong University of Science and TechnologyQingdao 266590China

We designed a disulfide-crosslinked mini-protein with a two-helical topology consisting of L-and Damino acids,which was exceptionally stable in ***,we further used it as a scaffold to design mini-proteins targeting p53 positive tumor *** on bifunctional grafting,key residues from the transactivation domain of p53 and a designed unnatural amino acid were grafted into the helix constituted by L-amino acids to confer the mini-protein with MDM2 inhibitory ***,ten Arg residues were introduced to improve its membrane penetrating *** the mini-proteins,UPROL-10e showed nano-molar binding affinity on MDM2 and cellular toxicity on p53 expressing HCT116cells.

关键词： Protein design Antitumor agents In silico design Constrained peptide Epitope grafting

在线全文

学校读者我要写书评

暂无评论

含硫尾砂充填体长期强度性能及其影响因素

中南大学学报（自然科学版） 2018年第6期49卷 1504-1510页

作者：姜关照吴爱祥李红王贻明王洪江北京科技大学金属矿山高效开采与安全教育部重点实验室北京100083 北京科技大学土木与资源工程学院北京100083

针对含硫尾砂胶结充填体经常出现的后期强度劣化现象,进行含硫和无硫尾砂充填体强度对比试验,研究灰砂比和料浆对含硫尾砂充填体长期强度性能的影响,并采用XRD和SEM对含硫尾砂充填体中水化产物进行分析。研究结果表明:尾砂含硫量(质量分... 详细信息

针对含硫尾砂胶结充填体经常出现的后期强度劣化现象,进行含硫和无硫尾砂充填体强度对比试验,研究灰砂比和料浆对含硫尾砂充填体长期强度性能的影响,并采用XRD和SEM对含硫尾砂充填体中水化产物进行分析。研究结果表明:尾砂含硫量(质量分数)为6.1%,主要硫化物为黄铁矿时,充填体120 d强度下降达到47.4%。灰砂比为1:8时,充填体各龄期强度显著增加,后期强度劣化得到改善。灰砂比为1:16时,充填体长期强度稳定在0.85 MPa左右。充填料浆质量分数对充填体强度影响也较为显著,质量分数为74%~76%时,充填体后期强度下降幅度最小。当充填体内部结构较疏松时,次生石膏可以填充水化产物之间的空隙,在一定程度上改善充填体长期强度性能。充填体结构较为致密时,次生石膏会破坏其微观结构,降低充填体后期强度。

关键词：含硫尾砂灰砂比料浆质量分数强度性能硫酸盐侵蚀

Ballistic performances of the hourglass lattice sandwich structures under high-velocity fragments

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第1期31卷 312-325页

作者： He-xiang wu Jia Qu Lin-zhi wu Key Laboratory of Advanced Ship Materials and Mechanics College of Aerospace and Civil EngineeringHarbin Engineering UniversityHarbin150001China School of Civil Engineering Northeast Forestry UniversityHarbin150040China

In this paper,the numerical simulation method is used to study the ballistic performances of hourglass lattice sandwich structures with the same mass under the vertical incidence of *** is paid to elucidating the influences of rod cross-section dimensions,structure height,structure layer,and rod inclination angle on the deformation mode,ballistic performances,and ability to change the ballistic direction of *** results show that the ballistic performances of hourglass lattice sandwich structures are mainly affected by their structural *** this respect,structural parameters optimization of the hourglass lattice sandwich structures enable one to effectively improve their ballistic limit velocity and,consequently,ballistic performances.

关键词： Hourglass lattice sandwich structures Ballistic performances high-velocity Finite element analysis

Resilience-incorporated seismic risk assessment of precast concrete frames with“dry”connections

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2024年第2期23卷 403-425页

作者： wu Chenhao Tang Yuchuan Cao Xuyang wu Gang Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Nanjing 211102China Department of Civil and Environmental Engineering University of CaliforniaLos AngelesCA 90095USA School of Civil Engineering Southeast UniversityNanjing 211102China College of Civil and Transportation Engineering Hohai UniversityNanjing 210024China

A resilience-incorporated risk assessment framework is proposed and demonstrated in this study to manifest the advantageous seismic resilience of precast concrete frame(PCF)structures with“dry”connections in terms of their low damage and rapid *** framework integrates various uncertainties in the seismic hazard,fragility,capacity,demand,loss functions,and post-earthquake *** this study,the PCF structures are distinguished from ordinary reinforced concrete frame(RCF)structures by characterizing multiple limit states for the PCF based on its unique damage ***,probabilistic story-wise pushover analyses are performed to yield story-wise capacities for the predefined limit *** the seismic resilience analysis,a step-wise recovery model is proposed to idealize the functionality recovery process,with separate considerations of the repair and non-repair *** recovery model leverages the economic loss and downtime to delineate the stochastic post-earthquake recovery curves for the resilience loss *** such,contingencies in the probabilistic post-earthquake repairs are incorporated and the empirical judgments on the recovery parameters are largely *** proposed framework is demonstrated through a comparative study between two“dry”connected PCFs and one RCF designed as alternative structural systems for a prototype *** results from the risk quantification indicate that the PCFs show reduced loss hazards and lower expected losses relative to the ***,the PCF equipped with energy dissipation devices at the“dry”connections largely reduces the expected economic loss,downtime,and resilience loss by 29%,56%,and 60%,respectively,compared to the RCF.

关键词： precast concrete frame non-emulative precast system seismic resilience seismic risk functional recovery

New findings on the influence of El Nino events on tropical cyclone formation

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第3期67卷 892-893页

作者： Liguang wu Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China

Tropical cyclones typically form over warm tropical and subtropical ocean surfaces, as their formation and intensification rely primarily on the energy provided by the ocean. Pioneering research by Gray (1968) revealed that the formation of tropical cyclones requires the sea surface temperature (SST) to be no less than 26.5℃. Consequently, SST is commonly recognized as a crucial parameter among the environmental factors influencing tropical cyclone formation(Gray, 1979;Emanuel and Nolan, 2004).

关键词： tropical cyclone ocean