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Synthesis and Bioactivity of novel 1,1,2-Triarylethanes as Phosphodiesterase 4 Inhibitors

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Synthesis and Bioactivity of novel 1,1,2-Triarylethanes as P...

2011年全国药物化学学术会议——药物的源头创新

作者： chuanguang qin~*,Lin Li,Hailiang Li,Yuan Zhang (faculty of life science,northwestern polytechnical university,xi''an 710072)

＜正＞The 1,1,2-triarylethane motif is emerging as a new structure for the inhibition of phosphodiesterase 4（PDE 4）.PDE 4 is distributed in most immune and inflammatory cells and airway smooth muscle and is therefore a promising target for the treatment of diseases such as asthma and COPD（chronic obstructive pulmonary disease）.The efficient synthesis of biologically

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Antioxidant activities of crude,purified and carboxymethylated polysaccharides from Gynostemma pentaphyllum Makino

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Antioxidant activities of crude,purified and carboxymethylat...

2011年全国药物化学学术会议——药物的源头创新

作者： xiaoya Shang~*,Yuan Zhang,Weining Niu,Chunlan Xu,chuanguang qin faculty of life science,northwestern polytechnical university,xi''an,Shaanxi 710072,China

＜正＞Crude polysaccharides（GPMPP） were prepared from *** Makino,by boiling-water extraction and ethanol *** polysaccharides（GPMP） were obtained from crude polysaccharides after removing protein and *** carboxy me... 详细信息

关键词： Gynostemma pentaphyllum Makino Polysaccharides carboxymethylation Antioxidant activity

Parallel Synthesis and Antimicrobial Activities of Gramicidine S and its Analogues

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Parallel Synthesis and Antimicrobial Activities of Gramicidi...

2006中国微生物学会第九次全国会员代表大会暨学术年会

作者： Yan Ding, Chuan-Guang qin , Rui-Jie Zhang, Yang Li faculty of life science, northwestern polytechnical university, xi’an 710072, Shaanxi, China

Gramicidin S is a cyclic decapeptide antibiotic which is produced by Bacillus brevis. In this paper, a novel method is described for the facile parallel synthesis of gramicidin S and its analogues, using standard solid-phase synthetic technology and a direct cyclization-cleavage step. Compared with previous approaches, the presented

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Mode Mixity for Orthotropic Interface Delamination in Laminated Composites

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Journal of Southwest Jiaotong university(English Edition) 2009年第1期17卷 58-64页

作者：范学领孙秦原梅妮菊池正纪 School of Aeronautics Northwestern Polytechnical University faculty of science and Engineering Tokyo University of Science School of Materials Northwestern Polytechnical University

The mode mixity is defined based on nonoscillatory strain energy release rate components of delamination between two different orthotropic materials to evaluate the delamination behavior of laminated composites. The result showes that the relative location of the delamination through the thickness influences the mode mixity in a relatively well-regulated way, and that the reinforcement directions of the adjacent plies along the delamination front have a more complicated impact on the mode mixity. This is caused by the bending/twist coupling and bending/bending coupling in the stress field at the crack tip for delamination between multidirectional plies, which completely modifies the stress and strain fields ahead of the crack tip. These kinds of couplings account for the non- uniform distribution of mode mixity values along the delamination front. Application of appropriate mode mixity values is necessary for accurate prediction of delamination growth.

关键词： Mode mixity Delamination Intedaminar fracture Strain energy release rate (SERR)

Head-to-tail cyclization for the synthesis of naturally occurring cyclic peptides on organophosphorus small-molecular supports

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Organic Chemistry Frontiers 2022年第4期9卷 946-952页

作者： Haidi Li Junyou Li Jie Chao Zixin Zhang chuanguang qin MIIT Key Laboratory of Special Functional&Intelligent Polymer materials MOE Key Laboratory of Supernormal Material Physics&ChemistryShaanxi Key Laboratory of Polymer Science&TechnologyDepartment of ChemistrySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an710072P.R.China

To achieve head-to-tail cyclic peptides via the liquid-phase on-support cyclization and synergistic self-cleavage strategy,4,4’-bis(diphenylphosphinyloxyl)diphenyl ketoxime(BDKO)and 4-diphenyl phospho-loxy benzyl alcohol(DPBA)were designed and prepared as small-molecular supports of greener peptide *** the process of the BDKO(or DPBA)support assisted Boc strategy for liquid-phase peptide chain extension,the last amino acid at the N-terminus of the peptide chain ends with a Fmoc protected amino acid.

关键词： synthesis cyclization synthesis

Microbial-driven ectopic uranium extraction with net electrical energy production

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Frontiers of Environmental science & Engineering 2024年第1期18卷 49-58页

作者： xin Tang Yin Ye Chunlin Wang Bingqian Wang Zemin qin Cui Li Yanlong Chen Yuheng Wang Zhiling Li Miao Lv Aijie Wang Fan Chen School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710129China School of Materials science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China

The extraction of uranium (U) from U-bearing wastewater is of paramount importance for mitigating negative environmental impacts and recovering U resources. Microbial reduction of soluble hexavalent uranium (U(VI)) to insoluble tetravalent uranium (U(IV)) holds immense potential for this purpose, but its practical application has been impeded by the challenges associated with managing U-bacterial mixtures and the biotoxicity of U. To address these challenges, we present a novel spontaneous microbial electrochemical (SMEC) method that spatially decoupled the microbial oxidation reaction and the U(VI) reduction reaction. Our results demonstrated stable and efficient U extraction with net electrical energy production, which was achieved with both synthetic and real wastewater. U(VI) removal occurred via diffusion-controlled U(VI)-to-U(IV) reduction-precipitation at the cathode, and the UIVO_(2) deposited on the surface of the cathode contributed to the stability and durability of the abiotic U(VI) reduction. Metagenomic sequencing revealed the formation of efficient electroactive communities on the anodic biofilm and enrichment of the key functional genes and metabolic pathways involved in electron transfer, energy metabolism, the TCA cycle, and acetate metabolism, which indicated the ectopic reduction of U(VI) at the cathode. Our study represents a significant advancement in the cost-effective recovery of U from U(VI)-bearing wastewater and may open a new avenue for sustainable uranium extraction.

关键词： U(VI)bioreduction Electricity production Reaction decoupling Uranium-bearing wastewater Biofilm microbiome

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芳香偶氮衍生物合成策略研究的新进展

有机化学 2013年第3期33卷 444-457页

作者：钦传光李洋李海亮李大为牛卫宁尚晓娅徐春兰西北工业大学理学院应用化学系教育部空间应用物理与化学重点实验室陕西省高分子科学与技术重点实验室西安710129 西北工业大学生命学院西安710072

芳香偶氮化合物具有独特的光致顺反异构特性,不仅应广泛用于传统化学工业,还将应用于光化学分子开关、主客体超分子化学识别、自组装液晶材料、生物医学成像与化学分析以及光驱分子马达等诸多新兴科学领域.特别具挑战性的是开发具有高... 详细信息

芳香偶氮化合物具有独特的光致顺反异构特性,不仅应广泛用于传统化学工业,还将应用于光化学分子开关、主客体超分子化学识别、自组装液晶材料、生物医学成像与化学分析以及光驱分子马达等诸多新兴科学领域.特别具挑战性的是开发具有高化学稳定性和热稳定性又易检测的偶氮发色团,近年来受到科研工作者们的高度关注.随着人们对研究新型芳香偶氮衍生物的迫切需要,又相继创新和发展了一些更新、更有效的芳香偶氮化合物合成方法,综述了最近新型芳香偶氮衍生物合成方法的新进展,尤其强调了芳基肼的氧化脱氢反应和金属催化偶联反应、芳胺的氧化反应、硝基芳香化合物的还原偶联反应、芳香偶氮氧化物的转化与还原、叠氮芳香化合物的催化偶联与热分解反应以及芳香基重氮盐的偶合与催化偶联反应等在芳香偶氮化合物合成方面应用的新趋势.

关键词：芳香偶氮衍生物合成策略芳基肼芳胺芳香硝基化合物芳香叠氮化合物

In-situ formed hierarchical transition metal oxide nanoarrays with rich antisite defects and oxygen vacancies for high-rate energy storage devices

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Chinese Chemical Letters 2022年第5期33卷 2669-2676页

作者： Teng Wang Bo Xu You Wang Jiaqi Lei Wenjing qin Ke Gui Chuying Ouyang Kai-Jie Chen Hongxia Wang Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology Xi’an Key Laboratory of Functional Organic Porous MaterialsDepartment of ChemistrySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China School of Chemistry and Physics Faculty of ScienceQueensland University of TechnologyBrisbaneQLD 4001Australia Department of Physics Laboratory of Computational Materials PhysicsJiangxi Normal UniversityNanchang 330022China

Developing transition metal oxides(TMOs)with high energy,power,and long cycle lifetime for elec-tric energy storage devices remains a critical challenge to ***,we demonstrate a facile method that enables in-situ transformation of nickel cobalt oxide nanowire arrays(NiCoO NWA)into hierarchical nanowire-nanosheet arrays(ac-NiCoO NWSA)for enhanced energy storage *** specifically,the method leads to formation of atomically thin nanosheets(only 2.0 nm)and creates abundant an-tisite defects and oxygen *** to these merits,the as-prepared ac-NiCoO NWSA electrode exhibits over five-fold higher specific capacity,superior rate capability(up to 100 A/g),and excellent cy-cling stability of 10,000 cycles at 50 A/g in alkaline electrolyte compared to pristine NiCoO *** functional theory(DFT)simulations elucidate the electrochemical activity enhancement mechanism of the ***,our method triggers similar structural reconstruction phenomenon on other TMOs including ZnCo-,CoMn-and ZnNiCo-oxides,proving the universality of the *** findings provide a general method towards simultaneously manipulating the micro-morphologies and defects of TMOs for advanced energy storage devices.

关键词： Transition metal oxides In-situ transformation Oxygen vacancy Antisite defects High-rate Hybrid supercapacitors

Role of chloride on the instability of blue emitting mixed‑halide perovskites

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Frontiers of Optoelectronics 2023年第4期16卷 61-70页

作者： Max Karlsson Jiajun qin Kaifeng Niu xiyu Luo Johanna Rosen Jonas Björk Lian Duan Weidong Xu Feng Gao Department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköpingSweden Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China Frontiers science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)Northwestern Polytechnical UniversityXi’an 710072China

Although perovskite light-emitting diodes(PeLEDs)have seen unprecedented development in device efciency over the past decade,they sufer signifcantly from poor operational *** is especially true for blue PeLEDs,whose operational lifetime remains orders of magnitude behind their green and red ***,we systematically investigate this efciency-stability discrepancy in a series of green-to blue-emitting PeLEDs based on mixed Br/*** fnd that chloride incorporation,while having only a limited impact on efciency,detrimentally afects device stability even in small *** lifetime drops exponentially with increasing Cl-content,accompanied by an increased rate of change in electrical properties during *** ascribe this phenomenon to an increased mobility of halogen ions in the mixed-halide lattice due to an increased chemically and structurally disordered landscape with reduced migration *** results indicate that the stability enhancement for PeLEDs might require diferent strategies from those used for improving efciency.

关键词： Ion migration Blue electroluminescence Mixed halide perovskites