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4-甲基-1,2,3-噻二唑-5-甲酸钕配合物的合成、晶体结构及与DNA作用

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中国稀土学报 2015年第6期33卷 697-704页

作者：余玉叶俞世钢赵国良浙江师范大学行知学院浙江金华321004 金华职业技术学院浙江金华321007

合成了新型钕配合物[Nd(CH_3COO)(C_4H_3N_2O_2S)_2(H_2O)_2](C_4H_4N_2O_2S=4-甲基-1,2,3-噻二唑-5-甲酸),通过元素分析、红外光谱和热重分析对产物进行了表征,用单晶X射线衍射方法测定了配合物的晶体结构。配合物属于三斜晶系,空间群P... 详细信息

合成了新型钕配合物[Nd(CH_3COO)(C_4H_3N_2O_2S)_2(H_2O)_2](C_4H_4N_2O_2S=4-甲基-1,2,3-噻二唑-5-甲酸),通过元素分析、红外光谱和热重分析对产物进行了表征,用单晶X射线衍射方法测定了配合物的晶体结构。配合物属于三斜晶系,空间群Pī,晶胞参数:a=0.95486(12)nm,b=1.03280(15)nm,c=1.8244(2)nm,α=92.945(7)°,β=92.582(7)°,γ=94.401(7)°,晶胞体积:V=1.7893(4)nm^3,晶胞内结构基元数Z=4,式量Mr=525.62。晶体结构分析表明,Nd(Ⅲ)分别与来自四个4-甲基-1,2,3-噻二唑-5-甲酸配体的4个羧基氧原子、2个三齿螯合桥联的醋酸根离子中的3个氧原子和2个水分子中的2个氧原子配位,形成九配位的单帽四方反棱柱的配位几何构型。用荧光光谱研究了配体和配合物与DNA之间的相互作用,结果表明,配合物的作用强于配体。

关键词： 4-甲基-1,2,3-噻二唑-5-甲酸钕配合物晶体结构 DNA

4-甲基-1,2,3-噻二唑-5-甲酸构筑的一维稀土配位聚合物的合成与晶体结构

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中国稀土学报 2016年第3期34卷 289-296页

作者：余敏艳赵国良沈金杯余玉叶浙江师范大学行知学院浙江金华321004 浙江师范大学化学与生命科学学院浙江金华321004 金华职业技术学院浙江金华321007

由4-甲基-1,2,3-噻二唑-5-甲酸(HL,C_4H_4N_2O_2S)和相应的稀土硝酸盐Ln(NO_3)3·n H_2O(Ln=Tb,Dy,Ho,Yb)合成了4个一维稀土配位聚合物{[Ln(L)_3(H_2O)2]·H_2O}_n(Ln=Tb,1;Dy,2;Ho,3;Yb,4),均得到单晶,用元素分析、红外光谱、热重分析和X射线单晶衍射确定了产物的组成和结构。结构分析表明:4种晶体属于异质同晶型,同属于三斜晶系,空间群为Pī。每个中心金属离子Ln(III)与5个噻二唑甲酸根中的6个羧基氧原子和2个配位水分子上的两个O原子配位,配位数为8,形成一个三角十二面配位多面体。

关键词： 2-甲基-1,2,3-噻二唑-5-甲酸聚合物晶体结构稀土

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场地堆料机悬臂皮带机设计计算的探讨

港口科技 2013年第4期 14-16页

作者：俞玉叶上海振华重工(集团)股份有限公司上海200125

场地堆料机在我国大宗干散货的港口码头和车站已获得普遍的使用。为了使广大用户深化理解堆料机的使用价值和机械性能,对其结构、带速、皮带、托辊型式、电机功率、传动机构和张紧装置等的选型,进行介绍。同时探讨皮带机阻力和相关机构... 详细信息

场地堆料机在我国大宗干散货的港口码头和车站已获得普遍的使用。为了使广大用户深化理解堆料机的使用价值和机械性能,对其结构、带速、皮带、托辊型式、电机功率、传动机构和张紧装置等的选型,进行介绍。同时探讨皮带机阻力和相关机构的计算和验算方法等。可供参考。

关键词：港口堆场堆料机悬臂皮带机选型计算

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镍(Ⅱ)含氮配体配合物的热分解研究

浙江师范大学学报（自然科学版） 2006年第3期29卷 306-310页

作者：余玉叶祝慧金华职业技术学院浙江金华321017 浙江师范大学化学与生命科学学院浙江金华321004

用非等温热重法研究了[N i(NH3)6]C l2、[N i(py)4]C l2、[N i(en)3]C l2、[N i(b ipy)2]C l2、[N i(phen)2]C l2五种配合物在氮气、氧气气氛下的热分解反应机理,比较得出了2种条件下5种配合物的热稳定性;并对配合物[N i(py)4]C l2在不... 详细信息

用非等温热重法研究了[N i(NH3)6]C l2、[N i(py)4]C l2、[N i(en)3]C l2、[N i(b ipy)2]C l2、[N i(phen)2]C l2五种配合物在氮气、氧气气氛下的热分解反应机理,比较得出了2种条件下5种配合物的热稳定性;并对配合物[N i(py)4]C l2在不同条件下特定分解阶段的非等温热重分析数据采用ACHAR法和COATS-REDFERN法进行了拟合,得出了相应分解阶段该配合物的热分解机理.

关键词：热分解动力学机理热分析非等温法镍(Ⅱ)配合物

3,4-二甲氧基苯乙酸邻菲啰啉钆(Ⅲ)配合物的合成、晶体结构及铕(Ⅲ)离子掺杂配合物的荧光光谱

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中国稀土学报 2010年第5期28卷 525-530页

作者：余玉叶刘建风李花琼吴小勇赵国良浙江师范大学化学与生命科学学院浙江金华321004 金华职业技术学院浙江金华321007 浙江师范大学行知学院浙江金华321004

合成了3,4-二甲氧基苯乙酸邻菲啰啉钆(Ⅲ)配合物:[Gd2(DMPA)6(phen)2](HDMPA=3,4-二甲氧基苯乙酸,C12H12O4;phen=1,10-邻菲啰啉),并通过元素分析、红外光谱、热重分析对其进行了表征,用单晶X射线衍射方法测定了配合物的晶体结构,晶体属... 详细信息

合成了3,4-二甲氧基苯乙酸邻菲啰啉钆(Ⅲ)配合物:[Gd2(DMPA)6(phen)2](HDMPA=3,4-二甲氧基苯乙酸,C12H12O4;phen=1,10-邻菲啰啉),并通过元素分析、红外光谱、热重分析对其进行了表征,用单晶X射线衍射方法测定了配合物的晶体结构,晶体属于三斜晶系,空间群P-1。测定了铕离子掺杂的配合物的荧光光谱,荧光光谱表明,游离配体没有荧光,在形成配合物后,显示了铕(Ⅲ)离子的特征发射,在591,618,649和684 nm处观察到了4个分别对应于三价铕离子的5D0→7F1,5D0→7F2,5D0→7F3和5D0→7F4跃迁的特征发射峰,其中以5D0→7F2跃迁的发射最强,这表明配体将吸收的能量有效地转移给了中心离子,配体起到了很好的敏化作用。

关键词：钆(Ⅲ)配合物 3,4-二甲氧基苯乙酸邻菲啰啉晶体结构荧光光谱

Dissection of heterotic loci for grain yield using interconnected chromosome segment substitution lines in rice

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4-甲基-1,2,3-噻二唑-5-甲酸铈/钐配合物的合成及晶体结构

The Crop Journal 2022年第2期

作者： Chaopu Zhang Yongjian Sun Dianwen Wang Wenqiang Sun yuye yu Zhongli Hu Sibin yu

来源：博看期刊评论

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浙江师范大学学报（自然科学版） 2016年第3期39卷 298-302页

作者：赵国良张珂剡余玉叶浙江师范大学行知学院浙江金华321004 金华职业技术学院浙江金华321007

由4-甲基-1,2,3-噻二唑-5-甲酸(HL,C_4H_4N_2O_2S)和相应的稀土硝酸盐Ln(NO_3)_3·6H_2O(Ln=Ce;Sm)合成了2个配合物[Ln L_3(H_2O)_2]n,用元素分析和X-射线单晶衍射法确定了产物的组成和结构.分析表明:2种晶体属于异质同晶型,同属于三斜... 详细信息

由4-甲基-1,2,3-噻二唑-5-甲酸(HL,C_4H_4N_2O_2S)和相应的稀土硝酸盐Ln(NO_3)_3·6H_2O(Ln=Ce;Sm)合成了2个配合物[Ln L_3(H_2O)_2]n,用元素分析和X-射线单晶衍射法确定了产物的组成和结构.分析表明:2种晶体属于异质同晶型,同属于三斜晶系,空间群为Pī;每个中心金属离子Ln(Ⅲ)与5个噻二唑甲酸根(L^-)中的6个羧基氧原子和2个配位水分子上的氧原子配位,配位数为8,形成一个三角十二面配位多面体.

关键词： 4-甲基-1 2 3-噻二唑-5-甲酸铈钐配合物晶体结构

Analysis of the regional spectral properties in northwestern South China Sea based on an empirical orthogonal function

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Acta Oceanologica Sinica 2020年第7期39卷 107-114页

作者： Dongyang Fu yuye Huang Dazhao Liu Shan Liao Guo yu Xiaolong Zhang College of Electronic and Information Engineering Guangdong Ocean UniversityZhanjiang 524088China State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China

This study presents an analysis of the spectral characteristics of remote sensing reflectance(Rrs)in northwestern South China Sea based on the in situ optical and water quality data for August *** initially divided into four classes,classes A to D,using the max-classification algorithm,and the spectral properties of whole Rrs were characterized using the empirical orthogonal function(EOF)***,the dominant factors in each EOF mode were *** results indicated that more than 95%of the variances of Rrs are partly driven by the back-scattering characteristics of the suspended *** initial two EOF modes were well correlated with the total suspended matter and back-scattering ***,the first EOF modes of the four classes of Rrs(A-D Rrs-EOF1)significantly contributed to the total variances of each Rrs *** addition,the correlation coefficients between the amplitude factors of class A-D Rrs-EOF1 and the variances of the relevant water quality and optical parameters were better than those of the unclassified *** spectral shape of class ARrs-EOF1 was governed by the absorption characteristic of chlorophyll a and colored dissolved organic matter(CDOM).The spectral shape of class B Rrs-EOF1 was governed by the absorption characteristic of CDOM since it exhibited a high correlation with the absorption coefficient of CDOM(ag(λ)),whereas the spectral shape of class C Rrs-EOF1 was governed by the back-scattering characteristics but not affected by the suspended *** spectral shape of class D Rrs-EOF1 exhibited a relatively good correlation with all the water quality parameters,which played a significant role in deciding its spectral shape.

关键词： northwestern South China Sea remote sensing reflectance empirical orthogonal function analysis ocean color control factors

Damage evolution of rock-encased-backfill structure under stepwise cyclic triaxial loading

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 597-615页

作者： Xin yu yuye Tan Weidong Song John Kemeny Shengwen Qi Bowen Zheng Songfeng Guo Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100089China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing100089China University of Chinese Academy of Sciences Beijing100049China School of Civil and Resources Engineering University of Science and Technology BeijingBeijing100083China Key Laboratory of High-Efficient Mining and Safety of Metal Mines(Ministry of Education of China) University of Science and Technology BeijingBeijing100083China Department of Mining and Geological Engineering University of ArizonaTucsonAZ86721USA

Rock-encased-backfill(RB)structures are common in underground mining,for example in the cut-andfill and stoping *** understand the effects of cyclic excavation and blasting activities on the damage of these RB structures,a series of triaxial stepwise-increasing-amplitude cyclic loading experiments was conducted with cylindrical RB specimens(rock on outside,backfill on inside)with different volume fractions of rock(VF=0.48,0.61,0.73,and 0.84),confining pressures(0,6,9,and 12 MPa),and cyclic loading rates(200,300,400,and 500 N/s).The damage evolution and meso-crack formation during the cyclic tests were analyzed with results from stress-strain hysteresis loops,acoustic emission events,and post-failure X-ray 3D fracture *** results showed significant differences between cyclic and monotonic loadings of RB specimens,particularly with regard to the generation of shear microcracks,the development of stress memory and strain hardening,and the contact forces and associated friction that develops along the rock-backfill *** important finding is that as a function of the number of cycles,the elastic strain increases linearly and the dissipated energy increases ***,compared with monotonic loading,the cyclic strain hardening characteristics are more sensitive to rising confining pressures during the initial compaction *** finding is that compared with monotonic loading,more shear microcracks are generated during every reloading stage,but these microcracks tend to be dispersed and lessen the likelihood of large shear fracture *** transition from elastic to plastic behavior varies depending on the parameters of each test(confinement,volume fraction,and cyclic rate),and an interesting finding was that the transformation to plastic behavior is significantly lower under the conditions of 0.73 rock volume fraction,400 N/s cyclic loading rate,and 9 MPa *** the findings have important practical implications on t

关键词： Rock and backfill Triaxial cyclic loading Volume fraction Damage evolution 3D visualization