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通过一步溶剂热法合成了MnWO4纳米材料,用电镜(SEM,TEM)和X射线衍射(XRD)对MnWO4纳米材料进行表征.结果表明:MnWO4纳米材料为长约为300nm,直径约为120 nm的形貌似蚕茧状的晶体颗粒.将纳米蚕茧制备成电极,对其电化学测试表现出赝电容性能,当电流密度为0.1A.g-1时,比电容为13.9F.g-1. 相似文献
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通过一系列动物实验来探索不同频段音频对于SD大鼠消化系统的影响,探究大鼠消化系统受音频刺激后的响应规律,为中医五音理论和音乐疗法提供现代科学实验支撑.SD大鼠随机分成对照组、宫组、角组和徵组.以70dB相应的中医五音特征音频对宫组、角组、徵组SD大鼠保持24h不间断地刺激,持续28d,观察统计大鼠的体质量、进食量、饮水量及小肠推进率等指标.实验结果显示:各组大鼠在实验前体质量、进食量、饮水量数据方面无明显差异(P0.05);音频刺激开始后22~28d宫组间与对照组相比体质量增加,结果有显著性差异(P0.05),角组、徵组与对照组相比体质量在6~18d增长放缓,结果有显著性差异(P0.05),宫组与角组、徵组相比体质量6~28d增加,结果有显著性差异(P0.05);宫组、角组、徵组与对照组相比进食量无显著性差异(P0.05);宫组、角组、徵组与对照组相比饮水量2~28d增加,结果有显著性差异(P0.05);各组28d小肠推进率无显著性差异(P0.05).音频刺激会影响大鼠体质量增长与饮水量,但对进食量的影响并不显著,大鼠对音频刺激具有适应性,长期处于稳定的高分贝音频环境并不会显著改变肠蠕动效率. 相似文献
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γ-AlOOH作为液相法合成γ-Al2O3的前驱体,其形貌与最终产物的性能密切相关。 本文采用水热法合成γ-AlOOH纳米棒,通过改变Al3+浓度和沉淀剂的种类调控γ-AlOOH纳米棒的长径比,利用X射线衍射仪(XRD)和透射电子显微镜(TEM)表征产物的晶体结构和形貌。 结果表明,随Al3+浓度增大可得到长径比在5.9~8.0的γ-AlOOH纳米棒,而改变沉淀剂的种类可进一步将长径比增大到8.0~10.0。 通过对产物结晶过程的分析,发现增大Al3+浓度和增强沉淀剂碱性均可以促进铝离子与羟基的配合。 提高反应体系中Al(OH)3浓度,有利于γ-AlOOH晶粒的成核,促进了晶核之间的定向接触,从而提高了纳米棒的长径比。 长径比为10.0的γ-AlOOH纳米棒烧结所得纳米γ-Al2O3改性变压器油(体积分数为0.1%)的正冲击击穿强度较纯油提高9.9%. 相似文献
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γ-AlOOH作为液相法合成γ-Al_2O_3的前驱体,其形貌与最终产物的性能密切相关。本文采用水热法合成γ-AlOOH纳米棒,通过改变Al3+浓度和沉淀剂的种类调控γ-AlOOH纳米棒的长径比,利用X射线衍射仪(XRD)和透射电子显微镜(TEM)表征产物的晶体结构和形貌。结果表明,随Al3+浓度增大可得到长径比在5.9~8.0的γ-AlOOH纳米棒,而改变沉淀剂的种类可进一步将长径比增大到8.0~10.0。通过对产物结晶过程的分析,发现增大Al3+浓度和增强沉淀剂碱性均可以促进铝离子与羟基的配合。提高反应体系中Al(OH)3浓度,有利于γ-AlOOH晶粒的成核,促进了晶核之间的定向接触,从而提高了纳米棒的长径比。长径比为10.0的γ-AlOOH纳米棒烧结所得纳米γ-Al_2O_3改性变压器油(体积分数为0.1%)的正冲击击穿强度较纯油提高9.9%. 相似文献
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A novel compound of 1,2-dis(1,3-diphenylpropan-2-yl)disulfane(C30H30S2,Mr=454.27)was synthesized in ethanol with 1,3-diphenyl-2-propanone as raw materials,giving high yield of product(90%).Its structure was determined by IR,1H NMR,MS,elemental analysis and X-ray diffraction.The crystal belongs to monoclinic,space group C2 with a=18.727(3),b=6.5179(9),c=13.7576(18),β=131.0610(10)o,V=1266.2(3)3,Z=2,Dc=2.136 g/cm3,μ=1.078 mm-1,F(000)=843,R=0.0490 and wR=0.1247 for 3211 observed reflections with I>2(I).X-ray analysis reveals that the molecule is not symmetrical.There exist no classical hydrogen bonds andπ-πstacking interactions.Moreover,the thermal stability of compound 3 was investigated. 相似文献
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The title compound of Cu(C14H9O3)2(C5H5N)2(C2H5OH)2(1) was synthesized via the hy- drothermal reaction of CuCl2·2H2O and 9-hydroxy-fluorene-9-carboxylic acid(HHF) with pyridine, and characterized by elemental analysis and infrared spectra. The crystal belongs to triclinic, space group P1 with a = 8.8302(12), b = 10.1625(14), c = 12.2708(17), α = 86.207(2), β = 69.562(2), γ = 64.932(2)o, V = 930.3(2) 3, Z = 1, Mr = 764.30, Dc = 1.364 g/cm3, F(000) = 399, S = 1.059 and μ(MoKα) = 0.644 mm-1. The final R = 0.0459 and wR = 0.1274 for 3414 observed reflections with I 2σ(I). The copper atom is six-coordinated by two oxygen atoms from two different 9-hydroxy-fluorene-9-carboxylate ligands, two pyridine nitrogen atoms and two ethanol oxygen atoms, forming a distorted octahedral coordination geometry. The extensive O–H···O hydrogen bonding connects the molecules to form a one-dimensional chain structure. Between adjacent one-dimensional chains, a two-dimensional layered structure was formed by fluorene ring π-π packing interaction. Between the layers, a three-dimensional structure was formed through the π-π packing interaction of the pyridine ring. Moreover, the thermal stability and photoluminescent property of the complex has been investigated. 相似文献
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《海浪》是伍尔夫最难懂的长篇小说,但它却是作者的压卷之作。在小说中,伍尔夫借助诗与音乐的韵律,将欢动的生命之美以精巧的形式呈现出来;借助程式化、抽象化的人物形象,展示丰富多彩的人性品格,汇成纷繁的人生乐章;并借助死、丑、忧伤等作为灰色的副调衬托欢快的主调。 相似文献