感应熔炼制备La0.8-xCexMg0.2 Ni 3.8(x=0,0.1,0.3,0.5),研究Ce替代部分La对La4MgNi19超晶格负极材料相结构及电化学性能的影响。研究表明,La4MgNi19合金相由LaNi5,(La,Mg)2Ni7,(La,Mg)5Ni19(3R-Ce5Co19)相组成。加入Ce后,(La,Mg)2Ni7...感应熔炼制备La0.8-xCexMg0.2 Ni 3.8(x=0,0.1,0.3,0.5),研究Ce替代部分La对La4MgNi19超晶格负极材料相结构及电化学性能的影响。研究表明,La4MgNi19合金相由LaNi5,(La,Mg)2Ni7,(La,Mg)5Ni19(3R-Ce5Co19)相组成。加入Ce后,(La,Mg)2Ni7相消失,出现2H-Pr 5Co 19结构的(La,Mg)5Ni19相,同时随着Ce替代量的增多,(La,Mg)5Ni19相含量增多,LaNi5相随之减少,Ce加入有利于形成A5B19相,特别是形成2H-Pr5Co19结构。电化学放电容量随着x值的增加呈现先增后减趋势,x=0.1时样品的电化学放电容量380.36 mAh/g最佳。合金电极活化次数、容量保持率和倍率放电性能随着Ce含量增加而增大。H在合金中的扩散速率是影响其倍率放电性能主要因素。展开更多
目的探讨界面层相关纤维母细胞(interface zone fibroblasts,INFs)对胃癌细胞侵袭、迁移、增殖和凋亡的影响,为胃癌的合理有效治疗提供新思路和作用靶点。方法原代培养正常纤维母细胞(normal zone fibroblasts,NFs)、癌相关纤维母细胞(c...目的探讨界面层相关纤维母细胞(interface zone fibroblasts,INFs)对胃癌细胞侵袭、迁移、增殖和凋亡的影响,为胃癌的合理有效治疗提供新思路和作用靶点。方法原代培养正常纤维母细胞(normal zone fibroblasts,NFs)、癌相关纤维母细胞(cancer-associated fibroblasts,CAFs)和INFs,通过Transwell实验共培养小室建立NFs、CAFs和INFs与MGC-803细胞相互作用的体外模型,分析NFs、CAFs和INFs对MGC-803细胞侵袭和迁移能力的影响;用CCK-8实验和流式细胞仪检测间接共培养后,分析NFs、CAFs和INFs对MGC-803细胞增殖和凋亡能力的影响。结果 INFs在体外传代培养的过程中,高表达vimentin、FAP。与NFs和CAFs相比,INFs促进MGC-803细胞的侵袭、迁移和增殖能力,但抑制凋亡(P<0.05)。结论 INFs在胃癌的侵袭、迁移和转移等过程中起重要作用,将成为胃癌治疗的新靶点。展开更多
Crystal structure of a novel hydrated tridecameric polyaluminium chloride, [Al13（μ3-OH）6（μ2-OH）6（μ2-OH）12（H2O）24] Cl15·13H2O, has been determined by X-ray structure analysis, obtaining the detailed str...Crystal structure of a novel hydrated tridecameric polyaluminium chloride, [Al13（μ3-OH）6（μ2-OH）6（μ2-OH）12（H2O）24] Cl15·13H2O, has been determined by X-ray structure analysis, obtaining the detailed structural parameters and structure features. Moreover, the formation course was also discussed. The crystal belongs to monoclinic system, space group P21/c, with a = 1.3912（2）, b = 2.3529（3）, c = 2.2395（2） nm, β= 90.407（2）°, V = 7.3307（14） nm^3, Z = 4, Dc = 1.773 g/cm^3, F（000） = 4040, GOOF = 1.050,μ（MoKα）= 0.829 mm^-1, the final R = 0.0506 and wR = 0.1453 for 10553 observed reflections with I〉 2σ（I）. The structure of polycation of the title compound is different from either Keggin-type Al13 consisting of a central tetrahedral AlO4 core surrounded by twelve octahedral AlO6 units through corner-sharing or the ＂three hexameric rings juxtaposed＂ side by side predicted by ＂Core-Links＂ model linked by thirteen octahedral AlO6 units through edge-sharing. It has a ＂tortoise-like＂ structure with turnup ＂forefeet＂ and ＂tail＂, that is, an octahedral AlO6 core is surrounded by a ＂hexameric ring＂ through edge-sharing, then six octahedral AlO6 units are suspended onto the periphery of the ring upper and lower alternately by sharing two neighboring corners with an average turn angle of 21° entad. This kind of hydrated tridecameric polyaluminium chloride with such form is very important to further understand the existing forms and transformation rules of aluminium ion in hydrolysis system of its salts, speculate the process and mechanism of various hydrolysis and polymerization forms from Al（H2O）6^3＋ to Al（OH）3, and establish the relationship between structure and properties.展开更多
The thermal behavior of [Tb_2( m -MBA)_6(phen)_2](H_2O)_2( m -MBA=C_8H_7O_2, methoxybenzoate; phen=C_ 12 H_8N_2, 1,10-phenanthroline) in static air atmosphere was investigated by means of TG-DTG and DTA methods. The...The thermal behavior of [Tb_2( m -MBA)_6(phen)_2](H_2O)_2( m -MBA=C_8H_7O_2, methoxybenzoate; phen=C_ 12 H_8N_2, 1,10-phenanthroline) in static air atmosphere was investigated by means of TG-DTG and DTA methods. The thermal decomposition of the title compound takes place mainly in two steps. The intermediate and the residue for each decomposition were identified by the TG curve. By the kinetic method of processing thermal analysis data put forward by Malek et al ., it is defined that the kinetics model for the first-step thermal decomposition is SB( m,n ).展开更多
A new rare earth complex Tb（p-CIBA）3phen was synthesized and introduced into organic tight emitting devices （OLEDs） as emitting material. The Tb（p-CIBA）3phen was doped into PVK to improve the filmforming and hol...A new rare earth complex Tb（p-CIBA）3phen was synthesized and introduced into organic tight emitting devices （OLEDs） as emitting material. The Tb（p-CIBA）3phen was doped into PVK to improve the filmforming and hole-transporting property. Two kinds of devices were fabricated. The device structure is as the following. Single-layer device： ITO/PVK： Tb （p-CIBA） 3 phen /LiF/Al; double-layer device： ITO/PVK： Tb（p-CIBA）3phen/AIQ/LiF/AI. The performances of both devices were investigated carefully. We found that the emission of PVK was completely restrained,and only the green emission was observed from the electroluminescence. The full width at half maximum （FWHM） was less than 10 nm. The highest EL brighthess of the single-layer device is 25.4 cd/cm^2 at a fixed bias of 18 V,and the highest EL brightness of the double-layer device reaches 234.8 cd/cm^2 at a voltage of 20 V.展开更多
文摘目的探讨界面层相关纤维母细胞(interface zone fibroblasts,INFs)对胃癌细胞侵袭、迁移、增殖和凋亡的影响,为胃癌的合理有效治疗提供新思路和作用靶点。方法原代培养正常纤维母细胞(normal zone fibroblasts,NFs)、癌相关纤维母细胞(cancer-associated fibroblasts,CAFs)和INFs,通过Transwell实验共培养小室建立NFs、CAFs和INFs与MGC-803细胞相互作用的体外模型,分析NFs、CAFs和INFs对MGC-803细胞侵袭和迁移能力的影响;用CCK-8实验和流式细胞仪检测间接共培养后,分析NFs、CAFs和INFs对MGC-803细胞增殖和凋亡能力的影响。结果 INFs在体外传代培养的过程中,高表达vimentin、FAP。与NFs和CAFs相比,INFs促进MGC-803细胞的侵袭、迁移和增殖能力,但抑制凋亡(P<0.05)。结论 INFs在胃癌的侵袭、迁移和转移等过程中起重要作用,将成为胃癌治疗的新靶点。
基金Project supported by NNSFC (No. 20563002), NSF of Inner Mongolia Autonomous Region (200508010204) and Key Item Foundation of Education Committee of Inner Mongolia Autonomous Region (ZD01070)
文摘Crystal structure of a novel hydrated tridecameric polyaluminium chloride, [Al13（μ3-OH）6（μ2-OH）6（μ2-OH）12（H2O）24] Cl15·13H2O, has been determined by X-ray structure analysis, obtaining the detailed structural parameters and structure features. Moreover, the formation course was also discussed. The crystal belongs to monoclinic system, space group P21/c, with a = 1.3912（2）, b = 2.3529（3）, c = 2.2395（2） nm, β= 90.407（2）°, V = 7.3307（14） nm^3, Z = 4, Dc = 1.773 g/cm^3, F（000） = 4040, GOOF = 1.050,μ（MoKα）= 0.829 mm^-1, the final R = 0.0506 and wR = 0.1453 for 10553 observed reflections with I〉 2σ（I）. The structure of polycation of the title compound is different from either Keggin-type Al13 consisting of a central tetrahedral AlO4 core surrounded by twelve octahedral AlO6 units through corner-sharing or the ＂three hexameric rings juxtaposed＂ side by side predicted by ＂Core-Links＂ model linked by thirteen octahedral AlO6 units through edge-sharing. It has a ＂tortoise-like＂ structure with turnup ＂forefeet＂ and ＂tail＂, that is, an octahedral AlO6 core is surrounded by a ＂hexameric ring＂ through edge-sharing, then six octahedral AlO6 units are suspended onto the periphery of the ring upper and lower alternately by sharing two neighboring corners with an average turn angle of 21° entad. This kind of hydrated tridecameric polyaluminium chloride with such form is very important to further understand the existing forms and transformation rules of aluminium ion in hydrolysis system of its salts, speculate the process and mechanism of various hydrolysis and polymerization forms from Al（H2O）6^3＋ to Al（OH）3, and establish the relationship between structure and properties.
基金Supported by the Natural Science Foundation of Hebei Province(No.2 0 2 140 ) and Hebei Education Departm ent(No.2 0 0 112 1)
文摘The thermal behavior of [Tb_2( m -MBA)_6(phen)_2](H_2O)_2( m -MBA=C_8H_7O_2, methoxybenzoate; phen=C_ 12 H_8N_2, 1,10-phenanthroline) in static air atmosphere was investigated by means of TG-DTG and DTA methods. The thermal decomposition of the title compound takes place mainly in two steps. The intermediate and the residue for each decomposition were identified by the TG curve. By the kinetic method of processing thermal analysis data put forward by Malek et al ., it is defined that the kinetics model for the first-step thermal decomposition is SB( m,n ).
基金Supported by National Natural Science Foundation of China (90201004) Beijing Science and Technology Foundation ( H030430020410)Hebei provice Natural Science Foundation (203148) .
文摘A new rare earth complex Tb（p-CIBA）3phen was synthesized and introduced into organic tight emitting devices （OLEDs） as emitting material. The Tb（p-CIBA）3phen was doped into PVK to improve the filmforming and hole-transporting property. Two kinds of devices were fabricated. The device structure is as the following. Single-layer device： ITO/PVK： Tb （p-CIBA） 3 phen /LiF/Al; double-layer device： ITO/PVK： Tb（p-CIBA）3phen/AIQ/LiF/AI. The performances of both devices were investigated carefully. We found that the emission of PVK was completely restrained,and only the green emission was observed from the electroluminescence. The full width at half maximum （FWHM） was less than 10 nm. The highest EL brighthess of the single-layer device is 25.4 cd/cm^2 at a fixed bias of 18 V,and the highest EL brightness of the double-layer device reaches 234.8 cd/cm^2 at a voltage of 20 V.
