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Spectroscopic studies of the interaction between phosphorus heterocycles and cytochrome P450

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Journal of Pharmaceutical Analysis 2021年第6期11卷 757-763页

作者： Dumei Ma Libo Zhang yingwu yin Yuxing Gao Qian Wang Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005FujianChina Department of Chemistry and Biochemistry University of South CarolinaColumbiaSC29208USA Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005FujianChina

P450 fatty acid decarboxylase Ole T from Staphylococcus aureus(Ole TSA)is a novel cytochrome P450 enzyme that catalyzes the oxidative decarboxylation of fatty acids to yield primarily terminal alkenes and CO_(2) or minor a-andβ-hydroxylated fatty acids as *** this work,the interactions between a series of cycloalkyl phosphorus heterocycles(CPHs)and Ole TSAwere investigated in detail by fluorescence titration experiment,ultraviolet-visible(UV-vis)and31 P NMR *** titration experiment results clearly showed that a dynamic quenching occurred when CPH-6,a representative CPHs,interacted with Ole TSAwith a binding constant value of 15.2×104 M-1 at 293 *** thermodynamic parameters(ΔH,ΔS andΔG)showed that the hydrogen bond and van der Waals force played major roles in the interaction between Ole TSAand *** UV-vis and31 P NMR studies indicated the penetration of CPH-6 into the interior environment of Ole TSA,which greatly affects the enzymatic activity of Ole ***,our study revealed an effective way to use phosphorus heterocyclic compounds to modulate the activity of cytochrome P450 enzymes.

关键词： Phosphorus heterocycles Cytochrome P450 Ole T Interaction Spectroscopy

Immobilization of nano-zero-valent irons by carboxylated cellulose nanocrystals for wastewater remediation

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Frontiers of Chemical Science and Engineering 2020年第6期14卷 1006-1017页

作者： Bangxian Peng Rusen Zhou ying Chen Song Tu yingwu yin Liyi Ye Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Chemistry Physics and Mechanical EngineeringQueensland University of TechnologyBrisbaneQLD 4000Australia

Nano-zero-valent irons(nZVI)have shown great potential to function as universal a nd low-cost magnetic ***,the rapid agglomeration and easy surface corrosion of nZVI in solution greatly hinders their overall ***,carboxylated cellulose nanocrystals(CCNC),widely available from renewable biomass resources,wer e prepared and applied for the immobilization of *** doing so,carboxylated cellulose nanocrystals supporting nano-zero-valent irons(CCNC-nZVI)were obtained via an in-situ growth *** CCNC-nZVI were characterized and then evaluated for their performances in wastewater *** results obtained show that nZVI nanoparticles could attach to the carboxyl and hydroxyl groups of CCNC,and well disperse on the CCNC surface with a size of〜*** the CCNC acting as corrosion inhibitors improving the reaction activity of nZVI,CCNC-nZVI exhibited an improved dispersion stability and electron utilization *** Pb(II)adsorption capacity of CCNC-nZVI reached 509.3 mg·g^-1(298.15 K,pH=4.0),significantly higher than that of *** adsorption was a spontaneous exothermic process and could be perfectly fitted by the pseudo-second-order kinetics *** study may provide a novel and green method for immobilizing magnetic nanomaterials by using biomassbased resources to develop effective bio-adsorbents for wastewater decontamination.

关键词： carboxylated cellulose nanocrystals nanozero-valent irons magnetic bio-adsorbents wastewater remediation

Cylindrical PCL brushes on the surface of lanthanum hydroxide nanowires by ring-opening polymerization

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Chinese Science Bulletin 2010年第14期55卷 1376-1381页

作者： ZHOU Mi YUAN Jinying YUAN WeiZhong HONG Xiaoyin yin yingwu Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China State Key Laboratory of Rare Earth Materials Chemistry and Applications Beijing 100871 China

A core-shell hybrid nanostructure,a hard core of single-crystalline lanthanum hydroxide nanowires and a soft shell of brushes of poly (ε-caprolactone) (PCL), has been successfully prepared by ring-opening polymerization (ROP) on the surface of nanowires. Such special structures were proved by TEM images. Meanwhile, the thickness of polymer layers was measured. The chemical component and the grafted PCL quantity of the sample were characterized by FTIR and TGA, which provides a simple and universal method to functionalize non-carbon nanowires. The modified lanthanum hydroxide nanowires can be well-dispersed in good solvents for PCL.

关键词：氢氧化镧开环聚合纳米线 PCL 表面透射电子显微镜圆柱纳米结构

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电辅基在有机电合成中的应用

有机化学 2003年第7期23卷 628-635页

作者：赵萍尹应武清华大学化学系北京100084

对近年来电辅基在有机电合成中的应用研究概况进行了综述。电辅基共分为两大类,第一类电辅基是由第四主族的元素参与组成的有机基因,而有机硫基团属于第二类电辅基。电辅基可以使分子的最高占有轨道(HOMO)的能量升高,促进电子的传递,从... 详细信息

对近年来电辅基在有机电合成中的应用研究概况进行了综述。电辅基共分为两大类,第一类电辅基是由第四主族的元素参与组成的有机基因,而有机硫基团属于第二类电辅基。电辅基可以使分子的最高占有轨道(HOMO)的能量升高,促进电子的传递,从而降低有机底物的氧化电势,使碳原子与电辅基相连化学键选择性地断裂,同时接受亲核试剂的进攻,使反应的选择性提高。电辅基在今后的有机电化学合成中具有广阔的应用前景。

关键词：电辅基有机电解合成应用电化学法氧化还原反应有机基团

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微波合成水杨酸异丙酯

有机化学 2002年第10期22卷 750-753页

作者：栗云天尹应武清华大学化学系北京100084

研究了微波合成水杨酸异丙酯的工艺 ,与常规方法相对比 ,发现利用微波合成水杨酸异丙酯具有反应速度快、转化率高、杂质含量小、后处理简单、无三废排放等优点 .

关键词：微波合成水杨酸异丙酯反应速度杂质转化率

A Fast Insertion Tabu Search with Conflict-Avoidance Heuristic for the Multisatellite Multimode Crosslink Scheduling Problem

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Tsinghua Science and Technology 2024年第3期29卷 843-862页

作者： Weiyi Yang Lei He Xiaolu Liu Weican Meng yingwu Chen College of Systems Engineering National University of Defense TechnologyChangsha 410000China Beijing Institude of Tranking and Telecommunication Technology Beijing 100000China

An agile earth-observing satellite equipped with multimode cameras capable of transmitting observation data to other satellites is developed to rapidly respond to requests with multiple observation *** gives rise to the Multisatellite Multimode Crosslink Scheduling(MMCS)problem,which involves allocating observation requests to agile satellites,selecting appropriate timing and observation modes for the requests,and transmitting the data to the ground station via the satellite communication ***,a mixed integer programming model is introduced to include all complex time and operation *** solve the MMCS problem,a two-stage heuristic method,called Fast insertion Tabu Search with Conflict-avoidance(FTS-C)heuristic,is *** the first stage,a conflict-avoidance insertion algorithm is designed to generate a high-quality initial solution by considering the requests transmission and ***,the tabu search-based second stage optimizes the initial ***,an extensive empirical study based on a real-world situation demonstrates that FTS-C can generate a solution with higher quality in less time than other state-of-the-art algorithms and the CPLEX solver.

关键词： earth observation satellites scheduling tabu search heuristic data transmission and download mixedinteger programming model

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我国肥料使用中存在的问题及对策

科学通报 2015年第36期60卷 3527-3534页

作者：赵玉芬尹应武厦门大学化学化丁学院厦门361005

从我国化肥用量、结构和肥料管理3个角度出发,阐述了化肥生产和使用的基本现状以及存在的问题.必须通过调整肥料养分和产品类型来均衡作物必需的营养元素;通过肥料产业发展规划和政策法规管理来实现肥料可持续发展;应当以提高肥料利用... 详细信息

从我国化肥用量、结构和肥料管理3个角度出发,阐述了化肥生产和使用的基本现状以及存在的问题.必须通过调整肥料养分和产品类型来均衡作物必需的营养元素;通过肥料产业发展规划和政策法规管理来实现肥料可持续发展;应当以提高肥料利用率为核心,实施"以质量替代数量"的发展战略.建议通过技术措施、管理法规和科技创新来建立适合中国国情的绿色肥料保障体系.围绕绿色肥料,提出了科技界在构建绿色肥料保障体系过程中,需要重视和解决的关键科学问题:研究植物矿质营养学说与有机营养学说的融合;深入探究新型肥料作用机理与新产品创制技术,采用新技术革新大宗基础化肥;加强"肥料-土壤-植物"之间养分转化规律科学问题的梳理;探讨有机肥开发新的技术途径;呼吁创立以科学家、农学家、工业专家、企业家、政府主管部门共同主导的"科学的中国肥料体系".

关键词：化学肥料环境保护绿色制造中低品位磷矿

超微细球形碳酸钙膏体的制备及其在涂料中的应用

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涂料工业 2010年第6期40卷 67-69,73页

作者：赖永华尹应武袁可西南大学化学化工学院重庆400715 清华大学化学系北京100084 北京紫光英力化工技术有限公司北京100085

研究了超微细球形碳酸钙膏体的制备工艺条件,对其在涂料中的应用情况做了初步研究。为将超微细球形碳酸钙膏体工业化应用于涂料行业,降低涂料成本、提升涂料性能提供了科学依据。

关键词：超微细球形碳酸钙膏体涂料

Study of Relationship Between Photomitiators and the Mechanical Properties of Paint Film

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Study of Relationship Between Photomitiators and the Mechani...