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细粒棘球绦虫泛素结合酶基因家族的生物信息学及表达分析 被引量:1
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作者 杜小迪 侯巍 +5 位作者 苏中华 马青梅 何雪 华瑞其 阳爱国 杨光友 《畜牧兽医学报》 CAS CSCD 北大核心 2023年第6期2605-2618,共14页
本研究对细粒棘球绦虫泛素结合酶(EgE2s)基因家族进行鉴定、生物信息学分析以及检测其在不同发育阶段的转录水平,为其功能研究和构建优势抗原表位疫苗奠定基础。本研究基于数据库中细粒棘球绦虫基因组学信息,对EgE2s基因家族进行T-A克... 本研究对细粒棘球绦虫泛素结合酶(EgE2s)基因家族进行鉴定、生物信息学分析以及检测其在不同发育阶段的转录水平,为其功能研究和构建优势抗原表位疫苗奠定基础。本研究基于数据库中细粒棘球绦虫基因组学信息,对EgE2s基因家族进行T-A克隆、生物信息学分析以及采用qRT-PCR法检测了这些基因在原头蚴(Protoscolex, PSCs)和28日龄童虫中的转录水平。结果成功克隆并测序19个EgE2s基因,更正了两个原序列有误的EgE2s,分别为EgE2L3(登录号:MZ277618);EgE2J1(登录号:MZ277619)。三级结构和保守基序预测结果表明EgE2s高度保守。qRT-PCR结果显示,EgE2s的转录水平在PSCs和28日龄童虫中存在差异,其中EgE2A(P<0.001)、EgE2J1(P<0.01)在PSCs阶段高表达。B细胞抗原表位预测表明EgE2N的139-157区域位于EgE2s保守基序外。同时,T细胞抗原表位预测表明EgE2N与人和犬MHCⅠ类分子各有两个强结合位点,且有一个共同的抗原表位位点104-113。综上,EgE2A和EgE2J1可能在PSCs的生长发育中起重要作用。EgE2N的139-157和104-113区域可能是药物研究和疫苗开发的靶序列。 展开更多
关键词 细粒棘球绦虫 泛素结合酶基因家族 生物信息学 转录水平分析
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四川盆地中南部寒武系白云岩特征及形成机制 被引量:6
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作者 刘丽红 杜小弟 +1 位作者 徐守礼 文华国 《吉林大学学报(地球科学版)》 CSCD 北大核心 2017年第3期775-784,共10页
四川盆地寒武系厚度达千米,岩性从下到上依次由泥页岩-粉砂质泥岩-灰质白云岩-纯白云岩组成,其优质储层主要为中—上寒武统冼象池组的白云岩。本文通过与川东北长兴组—飞仙关组、塔河油田奥陶系白云岩对比,应用微量元素、稀土元素、碳... 四川盆地寒武系厚度达千米,岩性从下到上依次由泥页岩-粉砂质泥岩-灰质白云岩-纯白云岩组成,其优质储层主要为中—上寒武统冼象池组的白云岩。本文通过与川东北长兴组—飞仙关组、塔河油田奥陶系白云岩对比,应用微量元素、稀土元素、碳、氧、锶同位素等分析测试结果,对四川盆地中南部寒武系白云岩特征及形成机制进行了研究。研究结果表明:四川盆地中南部寒武系白云岩具有较高的铁、锰质量分数,平均值分别为6 502.9×10^(-6)和468.3×10^(-6),较低的锶质量分数,平均值为74.0×10^(-6),较低的碳氧同位素值,δ^(13)CVPDB和δ^(18)OVPDB平均值分别为-2.38‰和-7.74‰;四川盆地中南部寒武系碳酸盐岩经历了大气淡水淋滤作用,可能为准同生白云石化或混合水白云石化作用。 展开更多
关键词 川中南部寒武系 白云岩 白云化机制 混合水白云石化 四川盆地
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Fabrication of Ordered Meso-macroporous HPW/TiO_(2)Catalyst for Efficient Heterogeneous Oxidative Desulfurization
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作者 SHAN Hailin du Yue +1 位作者 du xiaodi LEI Jiaheng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2021年第3期338-346,共9页
In order to reduce the emission of SO_x in the environment,sulfur compounds must be removed efficiently from fuels.Three-dimensional highly ordered meso-macroporous HPW/TiO_(2)(3DO m/M HPW/TiO_(2))materials were synth... In order to reduce the emission of SO_x in the environment,sulfur compounds must be removed efficiently from fuels.Three-dimensional highly ordered meso-macroporous HPW/TiO_(2)(3DO m/M HPW/TiO_(2))materials were synthesized successfully by sol-gel method and applied as oxidative desulfurization catalyst for the model fuel.The characterization results displayed the existence of highly ordered meso-macroporous structures and the Keggin type of HPW was highly dispersed in TiO_(2)framework.The effect of catalyst on desulfurization under different reaction conditions was studied systematically.The results showed that the catalyst exhibited excellent desulfurization performance in the hydrogen peroxide oxidation system,which could be explained by the unique meso-macroporous structure of catalyst.In addition,the catalyst showed good cycling performance and the removal rate of DBT still reached 96.1%even after 6 cycles,providing a feasible method for the development and application of fuel deep desulfurization catalysts. 展开更多
关键词 SOL-GEL heteropoly acid 3DO m/M HPW/TiO_(2) oxidative desulfurization
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鄂尔多斯盆地东南部宜川—黄龙地区奥陶系风化壳储层发育特征 被引量:6
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作者 田亚 杜治利 +2 位作者 刘宝宪 杜小弟 陈夷 《吉林大学学报(地球科学版)》 EI CAS CSCD 北大核心 2017年第6期1620-1630,共11页
综合利用地震、测井和岩心等资料,对鄂尔多斯盆地东南部宜川—黄龙地区奥陶系碳酸盐岩储层进行了分析,认为该区具岩溶储层标志特征。岩心分析测试表明:该区风化壳储层岩石类型为含膏白云岩及次生灰岩;储集空间为白云岩溶蚀孔洞、次生灰... 综合利用地震、测井和岩心等资料,对鄂尔多斯盆地东南部宜川—黄龙地区奥陶系碳酸盐岩储层进行了分析,认为该区具岩溶储层标志特征。岩心分析测试表明:该区风化壳储层岩石类型为含膏白云岩及次生灰岩;储集空间为白云岩溶蚀孔洞、次生灰岩相对孤立溶孔和裂缝;储层整体较为致密,孔隙度为0.30%~11.54%,平均值为3.90%,渗透率为(0.002~15.450)×10^(-3)μm^2,平均值为0.710×10^(-3)μm^2。储层形成受顺层岩溶作用影响,综合古地貌、沉积相、裂缝等条件认为,宜川古潜台西侧区域为古地貌较高部位,顺层岩溶储层较为发育,是后期勘探开发的有利区。 展开更多
关键词 鄂尔多斯盆地 奥陶系 马家沟组 顺层岩溶储层
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细粒棘球绦虫BAG3和EB1基因的克隆、表达及其在原头蚴细胞凋亡中的作用 被引量:1
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作者 何雪 王凝 +2 位作者 华瑞其 杜小迪 杨光友 《畜牧兽医学报》 CAS CSCD 北大核心 2022年第5期1562-1575,共14页
旨在探究细粒棘球绦虫BAG3(Eg-BAG3)和EB1(Eg-EB1)的分子特征及在原头蚴细胞凋亡过程中的作用,采用原核表达方法获得重组Eg-BAG3和Eg-EB1,利用生物信息学、蛋白免疫印迹及免疫荧光定位方法对Eg-BAG3和Eg-EB1的分子特征进行了初步探究,... 旨在探究细粒棘球绦虫BAG3(Eg-BAG3)和EB1(Eg-EB1)的分子特征及在原头蚴细胞凋亡过程中的作用,采用原核表达方法获得重组Eg-BAG3和Eg-EB1,利用生物信息学、蛋白免疫印迹及免疫荧光定位方法对Eg-BAG3和Eg-EB1的分子特征进行了初步探究,随后利用10 mmol·L^(-1)H_(2)O_(2)诱导原头蚴细胞凋亡,qRT-PCR方法检测Eg-BAG3和Eg-EB1的转录水平,并通过RNA干扰技术进一步探究二者与原头蚴细胞凋亡之间的关系。结果显示,Eg-BAG3含有BAG蛋白家族特征性的BAG结构域,Eg-EB1含有内吞蛋白家族特征性的BAR结构域,二者分别属于典型的BAG蛋白和内吞蛋白。免疫荧光定位结果显示Eg-BAG3广泛分布于细粒棘球绦虫的各个发育时期,Eg-EB1主要定位于原头蚴皮层、吸盘及顶突和包囊生发层,而在成虫未见特异性分布。H_(2)O_(2)可以成功诱导原头蚴细胞凋亡,且原头蚴中Eg-BAG3和Eg-EB1的相对转录水平都随着H_(2)O_(2)处理时间的延长而显著上升,在8 h后的相对转录水平与0 h相比具有显著性差异(P<0.05)。RNA干扰结果显示,Eg-BAG3干扰组原头蚴细胞凋亡率显著高于未干扰组(P<0.05),而Eg-EB1干扰组原头蚴细胞凋亡率低于未干扰组(P<0.05),表明Eg-BAG3在H_(2)O_(2)诱导的原头蚴细胞凋亡过程中起到抗凋亡作用,而Eg-EB1起到促凋亡作用。Eg-BAG3可以抑制氧化应激诱导的原头蚴细胞凋亡而Eg-EB1促进细胞凋亡,且二者可能参与调控不育囊的形成。 展开更多
关键词 细粒棘球绦虫 BAG3 EB1 凋亡 RNA干扰
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准噶尔盆地乌伦古坳陷中-新生代构造演化及成因机制 被引量:13
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作者 文磊 孙相灿 +5 位作者 李程 周新桂 杜小弟 高永进 易立 龚晓星 《岩石学报》 SCIE EI CAS CSCD 北大核心 2019年第4期1107-1120,共14页
乌伦古坳陷位于准噶尔盆地东北部、阿尔泰山南缘,由北西-南东走向的红岩断阶带、索索泉凹陷和南部斜坡带组成。坳陷内上三叠统直接覆盖在石炭系基底之上,上三叠统和侏罗系发育生长地层,白垩系向红岩断阶带方向超覆沉积在侏罗系顶削蚀不... 乌伦古坳陷位于准噶尔盆地东北部、阿尔泰山南缘,由北西-南东走向的红岩断阶带、索索泉凹陷和南部斜坡带组成。坳陷内上三叠统直接覆盖在石炭系基底之上,上三叠统和侏罗系发育生长地层,白垩系向红岩断阶带方向超覆沉积在侏罗系顶削蚀不整合面之上,古近系、新近系和第四系较稳定地沉积在白垩系顶小角度不整合面之上。索索泉凹陷中生界底面最深,往南部斜坡带逐渐抬高。红岩断阶带中生界被抬升剥蚀,古生界之上直接覆盖新生界。根据生长地层、不整合面、卷入变形的地层时代判断:早-中三叠世乌伦古坳陷延续了二叠纪的隆升剥蚀格局,地层缺失;晚三叠世-侏罗纪陆梁隆起隆升,在坳陷内沉积生长地层,局部发育逆冲断层;白垩纪为红岩断阶带主形成期,白垩系朝着红岩断阶带超覆沉积于侏罗系之上;古近纪构造变形微弱,沉积较为稳定;新近纪-第四纪发育挤压构造和正断层。乌伦古坳陷中生代受阿尔泰陆内造山作用制约,属于阿尔泰中生代陆内前陆盆地系统的一部分:楔顶带从阿尔泰山不断往南扩展,到白垩纪扩展到乌伦古坳陷红岩断阶带;前隆带位于陆梁隆起,并于晚三叠世-侏罗纪挠曲隆升。古近纪造山作用减弱,乌伦古坳陷区域沉降,地层较稳定沉积。新近纪-第四纪受印度-欧亚板块碰撞作用的远程效应影响,北天山发生陆内造山作用,乌伦古坳陷远离北天山,挤压构造变形相对较弱。新近纪-第四纪正断层为造山间歇期形成的区域性伸展构造,代表了中亚地区晚新生代脉动式冲断作用的一个间歇期。 展开更多
关键词 阿尔泰山 北天山 乌伦古坳陷 陆内造山带 红岩断阶带 正断层
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Effect of Crosslink Structure of Bridge Polycarboxylate Superplasticizers on Dispersion Ability 被引量:5
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作者 毕耀 雷家珩 +1 位作者 du xiaodi ZHANG Anfu 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2013年第2期339-342,共4页
Bridge polycarboxylate superplasticizers(PCs) with crosslink structure were synthesized by using polyethyleneglycol di-acrylate(PEGdA), replacing partial polyethyleneglycol mono-acrylate (PEGmA) as crosslinking ... Bridge polycarboxylate superplasticizers(PCs) with crosslink structure were synthesized by using polyethyleneglycol di-acrylate(PEGdA), replacing partial polyethyleneglycol mono-acrylate (PEGmA) as crosslinking agent. Structures of bridge PCs were analyzed by gel permeation chromatography, and dispersion ability was evaluated by cement paste dispersity variation on time and rheology test. The experimental results showed that, molecular weight(MW) of bridge PCs increased with increase of PEGdA proportion, and MW distribution curve changed from Gaussian to fiat like, which meant notable increase of highly crosslinked copolymer. Bridge PCs led to decreased initial cement paste dispersity and better dispersity retention due to slow releasing. Further research showed that, PEGdA proportion had slight effect on polymerization degree of backbone, MW distribution of backbone deviated from Gaussian distribution and shoulder peaks appeared on distribution curve when PEGdA increased. 展开更多
关键词 bridge polycarboxylate superplasticizers cement paste dispersity crosslink structure polyethyleneglycol di-acrylate
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Chronostratigraphy and Stratigraphic Classification of the Cretaceous of the Songliao Basin 被引量:4
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作者 Wang Pujun du xiaodi Wang Jun and Wang Dongpo 1)Geoenergy Department, Changchun University of Earth Sciences, Changchun, Jilin 2)Earth Sciences Department,Nanjing University,Nanjing,Jiangsu 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1996年第2期207-217,共11页
Isotopic ages of synsedimentary clay minerals were directly determined with the ultrasonicscattering-settlement separation-K-Ar dilution technique. The apparent age of black mudstoneis 123 Ma for the Quantou Formation... Isotopic ages of synsedimentary clay minerals were directly determined with the ultrasonicscattering-settlement separation-K-Ar dilution technique. The apparent age of black mudstoneis 123 Ma for the Quantou Formation, 111.9-89.0 Ma for the Qingshankou Formation and77.6-76.8 Ma for the upper part of the Nenjiang Formation. The Rb-Sr isochrone age of themuddy limestone-mudstone sequence of the lower part of the Nenjiang Formation is 81 Ma andthat of the muddy evaporite of the middle part of the Quantou Formation is 122.2 Ma. On thebasis of the above isotopic ages, the authors propose a modified scheme of stratigraphic classifi-cation of the Cretaceous of the Songliao basin. 展开更多
关键词 Songliao basin CRETACEOUS lake transgressive depositional sequence isotopic age stratigraphic classification
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Preparation of Polycarboxylate-based Superplasticizer and Its Effects on Zeta Potential and Rheological Property of Cement Paste 被引量:4
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作者 刘明 雷家珩 +3 位作者 BI Yao du xiaodi ZHAO Qinglin ZHANG Xuqing 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第5期1008-1012,共5页
A series of polycarboxylate-based superplasticizers(PCs) with different structures were synthesized and the effects of chemical structure on zeta potential and rheological property of cement paste were studied. Residu... A series of polycarboxylate-based superplasticizers(PCs) with different structures were synthesized and the effects of chemical structure on zeta potential and rheological property of cement paste were studied. Residual monomers in each sample of PCs were quantitatively determined. The property of the polymers in cement was tested by micro-electrophoresis apparatus and R/S rheometer. Results showed that the zeta potential and its rheological properties are related with the side-chain length and density of PCs. The PCs having shorter side chain and lower side chain density exhibit higher anionic charge density, thus resulting in higher zeta potential. The effect of side chain density on zeta potential is more notable compared with that of side-chain length, and thus affecting the initial shear yield stress and apparent viscosity of the cement paste. In addition, although increasing the side chain length will result in reduction of the anionic charge density, the steric hindrance effect is obvious, which can effectively improve the dispersion of the cement particles, and reduce the viscosity and shear yield stress of slurry. 展开更多
关键词 comb polymer polycarboxylate-based superplasticizers zeta potential cement dispersant rheological property
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Three-dimensionally Ordered Macroporous Phosphotungstic Acid/SiO2 for Efficient Catalytic Oxidative Desulfurization 被引量:3
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作者 杜岳 YANG Peng +3 位作者 雷家珩 ZHOU Shiyu LI Junsheng du xiaodi 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第4期849-854,共6页
Three-dimensionally ordered(3DOM) macroporous phosphotungstic acid/SiO_2(HPW/SiO_2) materials were prepared by using colloidal crystal as templates and applied for oxidative desulfurization(ODS) of the model fue... Three-dimensionally ordered(3DOM) macroporous phosphotungstic acid/SiO_2(HPW/SiO_2) materials were prepared by using colloidal crystal as templates and applied for oxidative desulfurization(ODS) of the model fuel oil. The obtained HPW/SiO_2 materials were characterized through scanning electron microscopy, powder X-ray diffraction, N_2 sorption, and Fourier transform infrared spectroscopy. The results indicated that 3 DOM HPW/SiO_2 possessed hierarchical pore architectures which contained ordered macropores and disordered mesopores, with the Keggin type HPW embedded in the framework of pore structure. The removal rate of dibenzothiophene(DBT) could reach 100% under the optimum conditions, moreover. The performance was only slightly decreased for the regenerated catalyst after 7 cycles. 展开更多
关键词 three-dimensionally ordered macroporous SiO2 phosphotungstic acid oxidativedesulfurization
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Oxidative Desulfurization of DBT with H2O2 over 3DOM H3PW12O40/Al2O3 Catalyst 被引量:2
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作者 LI Ang LEI Jiaheng +2 位作者 du Yue GUO Zhenran du xiaodi 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第4期671-676,共6页
A series of heteropoly acid (HPA) based Al2O3 catalysts with three-dimensional ordered (3DOM) structure were synthesized by colloidal crystal template method.Interconnected macropores (250 nm) could be clearly observe... A series of heteropoly acid (HPA) based Al2O3 catalysts with three-dimensional ordered (3DOM) structure were synthesized by colloidal crystal template method.Interconnected macropores (250 nm) could be clearly observed by scanning electron microscope (SEM) and transmission electron microscope (TEM).Mesopores could be detected by N2 adsorption-desorption isotherms which further confirmed the 3DOM structural characteristics of catalyst.Moreover,Keggin-type HPW was highly dispersed in the Al2O3 framework,which suggested by powder X-ray diffraction (XRD) and Fourier transform infrared spectra (FT-IR) results.The oxidation desulfurization (ODS) performance of 3DOM H3PW12O40/Al2O3 of refractory sulphur compounds was evaluated in the presence of hydrogen peroxide.It oxidized 98.5% of dibenzothiophene (DBT) into corresponding sulfone within 3 h,which exhibited superior ODS performance than corresponding mesoporous and microporous H3PW12O40/Al2O3 catalyst.The enhancement of ODS efficiency is related to the improvement of mass transfer of DBT in the pore channel resulting from the interconnected 3DOM structure.Furthermore,the as-prepared catalyst still demonstrates outstanding cycle performance after 6 runs,which could be easily recovered from the model fuel. 展开更多
关键词 3DOM structure oxidative desulfurization H3PW12O40/Al2O3 catalyst
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新疆博格达山前带油气调查进展 被引量:9
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作者 周新桂 高永进 +4 位作者 杜小弟 杨有星 孙相灿 张金虎 文磊 《中国地质调查》 2020年第1期1-6,共6页
博格达山前带位于准噶尔盆地南缘冲断带东段,构造变形复杂、沉积演化认识不清、成藏主控因素不明等关键地质问题制约了该区油气勘探进程。中国地质调查局油气资源调查中心新疆项目组在博格达山前带开展了一系列野外地质调查、地震资料... 博格达山前带位于准噶尔盆地南缘冲断带东段,构造变形复杂、沉积演化认识不清、成藏主控因素不明等关键地质问题制约了该区油气勘探进程。中国地质调查局油气资源调查中心新疆项目组在博格达山前带开展了一系列野外地质调查、地震资料处理解释、烃源岩地球化学分析等综合研究,厘清了该区构造变形样式和演化过程,明确了二叠系芦草沟组烃源岩沉积中心,评价了油气资源潜力,提出了该区复式油气成藏模式。钻探实践进一步证实了该区良好的油气资源潜力,推动了该区油气勘探进程,对类似地区开展油气勘探具有一定的借鉴意义。 展开更多
关键词 博格达山前带 二叠系芦草沟组 油气调查 资源潜力
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Synthesis and crystal structure of an organic-inorganic complex [Cu(DMF)_3(H_2O)_2]_2[SiMo_(12)O_(40)]·2H_2O
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作者 WANG Jingping du xiaodi +1 位作者 duAN Xianying NIU Jingyang 《Rare Metals》 SCIE EI CAS CSCD 2007年第4期377-384,共8页
The synthesis and crystal smacture of an polyoxometalate-based organic-inorganic complex [Cu(DMF)3(H2O)212[SiMo12O40].2H2O (DMF = N, N-dimethyl formamide) is described in this article. It was characterized using... The synthesis and crystal smacture of an polyoxometalate-based organic-inorganic complex [Cu(DMF)3(H2O)212[SiMo12O40].2H2O (DMF = N, N-dimethyl formamide) is described in this article. It was characterized using elemental analysis, thermal analysis, infrared, ultraviolet, and electron spin resonance spectroscopic studies. The X-ray crystallography analysis showed that the copper centers are pentacoordinated to show the square pyramidal geometry, and the polyanion [SiMo12O40]4- which is semi-coordinated to the copper(I/) centers prevents the existence of a sixth ligand. In addition, the intracationic hydrogen interaction enhanced the stability of the copper coordination cation. 展开更多
关键词 inorganic chemistry POLYOXOMETALATE crystal structure organic-inorganic complex Keggin structure
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Synthesis, Properties and Dispersion Mechanism of Sulphonated Acetone-formaldehyde Superplasticizer in Cementitious System
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作者 LIU Ming LEI Jiaheng +2 位作者 du xiaodi FU Chengfei HUANG Bo 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2013年第6期1167-1171,共5页
The synthesis, properties and dispersion mechanism of sulphonated acetone-formaldehyde superplasticizer (SAF) were presented. This superplasticizer was synthesized by the reaction among acetone, formaldehyde, sodium... The synthesis, properties and dispersion mechanism of sulphonated acetone-formaldehyde superplasticizer (SAF) were presented. This superplasticizer was synthesized by the reaction among acetone, formaldehyde, sodium sulfite and pyrosulfite. The structure and property were respectively characterized by IR and surface tension measurement. Performance of SAF in cement was evaluated by paste flow as well as heat calorimetry. The dispersion mechanism was identified via adsorption and zeta potential measurement. The results show that cement paste mixed with SAF shows good fluidity. SAF exerts little retarding effect on cement paste and it behaves like a typical polycondensate superplasticizer. The main dispersion mechanism of SAF is attributed to electrostatic repulsion. 展开更多
关键词 sulphonated acetone-formaldehyde superplasticizer dispersion mechanism zeta potential cement paste
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基于硼钨酸盐的稀土Eu的多金属氧酸盐材料的合成与发光性能研究 被引量:5
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作者 杜晓迪 朱广双 李春阳 《稀有金属》 EI CAS CSCD 北大核心 2017年第12期1347-1351,共5页
以Na_2WO_4·2H_2O,H_3BO_3及Eu(NO_3)_3·6H_2O等为原料,利用常规溶液合成法制备了一种基于硼钨酸盐的稀土多金属氧酸盐K_(7.5)H_(4.5)[Eu(BW_(11)O_(39))(W_5O_(18))]·21.5H_2O(1)。借助于X射线单晶衍射仪(SXRD)、X射线... 以Na_2WO_4·2H_2O,H_3BO_3及Eu(NO_3)_3·6H_2O等为原料,利用常规溶液合成法制备了一种基于硼钨酸盐的稀土多金属氧酸盐K_(7.5)H_(4.5)[Eu(BW_(11)O_(39))(W_5O_(18))]·21.5H_2O(1)。借助于X射线单晶衍射仪(SXRD)、X射线粉末衍射仪(PXRD)、红外光谱仪(IR)、热分析仪(TG-DTA)、以及荧光光谱仪(PL)等对样品的结构、热稳定性及发光性能进行了表征。结果表明,该化合物结晶于三斜晶系,Pī空间群,a=1.2648(3)nm,b=1.7290(4)nm,c=1.7637(4)nm,α=110.584(4)°,β=94.111(4)°,γ=96.546(4)°,V=3.5610(15)nm^3,H_(47.5)O_(78.5)BK_(7.5)EuW_(16),Mr=4701.2823,D_c=4.340 mg·m^(-3),μ(MoKα)=27.151 mm^(-1),F(000)=4045,GOF=1.019,Z=2,the final R_1=0.0389和wR_2=0.0960 for I>2θ(I)。该稀土多金属氧酸盐是以多金属氧酸盐阴离子[Eu(BW_(11)O_(39))(W_5O_(18))]^(12-)为构筑块的三维无机框架结构,该阴离子呈现夹心型构型,Eu^(3+)离子位于两个缺位阴离子[BW_(11)O_(39)]^(9-)和[W_5O_(18)]^(6-)的中间,该化合物呈现较高的热稳定性,在紫外光(λ_(ex)=394 nm)激发下,发射出较强的红光。 展开更多
关键词 多金属氧酸盐 稀土离子 合成 晶体结构 发光
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银杏白果、叶、外种皮中生物活性物质含量比较分析 被引量:7
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作者 李玲 雷家珩 +1 位作者 杜小弟 张佳丽 《食品工业》 CAS 北大核心 2018年第7期229-231,共3页
试验以乙醇、丙酮、60%乙醇和60%丙酮为萃取剂,采用高效液相色谱法对银杏白果、叶、外种皮中主要生物活性物质进行对比分析。结果表明,黄酮苷和萜内酯含量的大小顺序为:银杏叶(14.0 mg·g^(-1)和1.40 mg·g^(-1))>外种皮(0.6... 试验以乙醇、丙酮、60%乙醇和60%丙酮为萃取剂,采用高效液相色谱法对银杏白果、叶、外种皮中主要生物活性物质进行对比分析。结果表明,黄酮苷和萜内酯含量的大小顺序为:银杏叶(14.0 mg·g^(-1)和1.40 mg·g^(-1))>外种皮(0.67 mg·g^(-1)和0.19 mg·g^(-1))>白果种仁(0.17 mg·g^(-1)和0.073 mg·g^(-1));多糖含量的大小顺序为:外种皮(835 mg·g^(-1))>白果种仁(76.8 mg·g^(-1))>叶(26.3 mg·g^(-1));银杏酸含量的大小顺序为:外种皮(128.8 mg·g^(-1))>叶(26.5 mg·g^(-1))>白果种仁(2.1 mg·g^(-1))。白果种仁、叶、外种皮三者均含有丰富的K、Ca、Na、Mg、Fe、Zn元素。另外,4种萃取剂中,60%乙醇对黄酮苷、萜内酯和多糖的萃取测量值最高,而乙醇对银杏酸的萃取测量值最高。 展开更多
关键词 银杏生物活性物质 白果 外种皮 萃取 比较分析
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银杏叶茶制备条件对保健物质和风味物质含量的影响
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作者 胡婧 张丝柳 +2 位作者 雷家珩 杜小弟 武文君 《食品工业》 CAS 北大核心 2020年第9期222-225,共4页
采用HPLC法系统研究银杏叶茶制备条件对其保健物质和风味物质含量的影响,并探讨了茶叶冲泡条件。结果表明,180℃杀青2.5 min,揉捻5 min,60℃干燥1 h,制得的银杏叶茶保健物质损失较小,风味物质含量也较高。此时其黄酮(苷)、萜内酯含量分... 采用HPLC法系统研究银杏叶茶制备条件对其保健物质和风味物质含量的影响,并探讨了茶叶冲泡条件。结果表明,180℃杀青2.5 min,揉捻5 min,60℃干燥1 h,制得的银杏叶茶保健物质损失较小,风味物质含量也较高。此时其黄酮(苷)、萜内酯含量分别为13.51和1.39 mg·g^-1;氨基酸、单宁、儿茶素+C及没食子酸含量分别为52.65,12.94,0.85和0.59 mg·g^-1,酚氨比为0.25。该茶在100℃首次冲泡,茶汤保健物质含量分别为183.47和24.11 mg·L^-1;茶汤风味物质含量分别为434.68,96.73,10.69和9.07 mg·L^-1,酚氨比也相对较低。 展开更多
关键词 银杏叶茶 黄酮 萜内酯 风味物质 高效液相色谱
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