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化学和生物制剂处理对洋葱种子萌发的影响(英文)

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西北农林科技大学学报（自然科学版） 2003年第5期31卷 51-56页

作者：卫亚红 Dorna h Tylkowska K 西北农林科技大学资源环境学院陕西杨陵 712100 波兹南农业大学种子科学技术系

研究了洋葱种子"Wolska"在PEG8000和水引发条件下的萌发情况,以及杀菌剂(Penncozeb硫锌制剂和Apron爱普荣)和生物制剂(Biozym生物合剂,Promot助长剂)对洋葱种子萌发的影响。结果表明,10℃PEG引发处理中,所有的达到最大萌发率的时间和平... 详细信息

研究了洋葱种子"Wolska"在PEG8000和水引发条件下的萌发情况,以及杀菌剂(Penncozeb硫锌制剂和Apron爱普荣)和生物制剂(Biozym生物合剂,Promot助长剂)对洋葱种子萌发的影响。结果表明,10℃PEG引发处理中,所有的达到最大萌发率的时间和平均萌发时间较对照极显著减小,在该温度下,水引发处理效果比PEG引发好;20℃时,水引发处理达到最大萌发率的时间和平均萌发时间与对照及PEG处理间没有显著差异。杀菌剂处理在10℃时延缓了萌发速度,而在20℃时所有处理达到最大萌发率的时间和平均萌发时间与对照无显著差异。生物制剂处理在10℃和20℃下对萌发速度均没有改善;与对照相比,10℃的PEG引发与水引发处理极大地改善了萌发力;20℃时的生物制剂处理、PEG引发和水引发处理与对照相比,均未显著改善萌发力。

关键词：化学生物制剂洋葱种子萌发影响因素水引发处理杀菌剂处理萌发速度

采用混合Nb_(2)O_(5),B_(2)O_(3)和Mg粉末冶金法合成硼化铌

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Transactions of Nonferrous Metals Society of China 2016年第3期26卷 747-758页

作者： Ozge Balci Duygu Agaogullari M.lütfi Ovecoglu Ismail Duman Faculty of Chemical and Metallurgical Engineering Department of Metallurgical and Materials EngineeringParticulate Materials LaboratoriesIstanbul Technical UniversityAyazaga Campus34469 MaslakIstanbulTurkey

在强还原剂条件下,以相关的金属氧化物为原材料,采用粉末冶金法成功合成具有不同含量NbB、NbB_2和Nb_3B_4相的硼化铌粉末和单相NbB粉末。在室温下使用高能球磨机球磨Nb_2O_5、B_2O_3和Mg混合粉末。随后,利用hCl浸出除去球磨粉末中无用的... 详细信息

在强还原剂条件下,以相关的金属氧化物为原材料,采用粉末冶金法成功合成具有不同含量NbB、NbB_2和Nb_3B_4相的硼化铌粉末和单相NbB粉末。在室温下使用高能球磨机球磨Nb_2O_5、B_2O_3和Mg混合粉末。随后,利用hCl浸出除去球磨粉末中无用的MgO相,合成最终产物NbB-NbB_2-Nb_3B_4,产物在1500℃下退火4 h,以便观察硼化物之间的转换。采用XRD、DSC、PSA、SEM/EDX、TEM和VSM表征该产物。研究球磨时间(达9h)对产物形成、显微组织和热行为的影响。化学计量混合粉末经2 h球磨后,发生了还原反应。在不存在任何二次相和杂质时,通过机械化学法,球磨5 h并采用4 mol/l.h.l浸出,得到高纯纳米尺寸NbB-NbB_2-Nb_3B_4粉末。经退火处理后,纯的纳米尺寸NbB-NbB_2-Nb_3B_4粉末转变为单相NbB,不存在NbB_2和Nb_3B_4相。

关键词：硼化铌粉末粉末冶金机械化学合成退火组织

INFlUENCE OF TEMPERATURE AND PRESSURE ON ThE KINETICS OF Mg-6mol%laNi PREPARED BY hYDRIDING COMBUSTION SYNThESIS

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Acta Metallurgica Sinica(English letters) 2006年第2期19卷 124-132页

作者： Q. li K.C. Chou K.D. Xu l.J. Jiang J.Y. Zhang X.G. lu School of Materials Science and Engineering Shanghai University Shanghai 200072 China Department of Physical Chemistry University of Science and Technology Beijing Beijing 100083 China General Research Institute for Nonferrous Metals Beijing 100088 China

A new model to study the hydriding/dehydriding （h/D） kinetic mechanism has been applied in the two-phase （α-β） region of the Mg-6mol%laNi composite at temperature and pressure ranging from 523 to 623K and 0.256 to 0.992MPa h2. respectively. The coincidence of the theoretical calculation with the experimental data indicates that the rate-limiting step is hydrogen diffusion in the β phase for hydriding process and the diffusion of hydrogen in the α solid solution for hydrogen desorption with activation energies 89500 and 87900J/mol.h. for hID processes, respectively, which were much smaller than those of Mgh2 and can be attributed to the la and Ni additions.

关键词： powder metallurgy hydrogen storage materials kinetics

Precipitation analysis of as-cast hK40 steel after isothermal aging

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International Journal of Minerals,Metallurgy and Materials 2017年第10期24卷 1125-1133页

作者： M.l. Saucedo-Munoz A. Ortiz-Mariscal V.M. lopez-hirata J.D. Villegas-Cardenas Orlando Soriano-Vargas Erika O. Avila-Davila Instituto Politecnico Nacional (ESIQIE) Apdo. Postal 118-395 Mexico D.F. 07300 Universidad Politecnica Metepec y Tultitlan Edo. Mex. Mexico Tecnológico de Estudios Superiores de Jocotitlan Jocotitlan Edo. Mex. Mexico

As-cast hK40 steel was aged at 700, 800, or 900℃ for times as long as 2000 h. Microstructural characterization showed that the primary M_7C_3 carbide network contained a substantial content of manganese, in agreement with the microsegregation of manganese calculated by Thermo-Calc using the Scheil–Gulliver module. The dissolution of primary carbides caused the solute supersaturation of austenite and subsequent precipitation of fine M_(23)C_6 carbides in the austenite matrix for aged specimens. During prolonged aging, the carbide size increased with increasing time because of the coarsening process. A time–temperature–precipitation diagram for M_(23)C_6 carbides was calculated using the Thermo-CalcPRISMA software; this diagram showed good agreement with the experimental growth kinetics of precipitation. The fine carbide precipitation caused an increase in hardness; however, the coarsening process of carbides promoted a decrease in hardness. Nanoindentation tests of the austenite matrix indicated an increase in ductility with increasing aging time.

关键词： as-cast hK40 steel carbide precipitation aging precipitation simulation

M-giant star candidates identified in lAMOST DR 1

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Research in Astronomy and Astrophysics 2015年第8期15卷 1154-1165页

作者： Jing Zhong Sébastien lépine Jing li li Chen Jin-liang hou Ming Yang Guang-Wei li Yong Zhang Yong-hui hou Key laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of Sciences Department of Physics & Astronomy Georgia State University25 Park PlaceAtlantaGA30303USA Department of Astrophysics Division of Physical SciencesAmerican Museum of Natural HistoryCentral Park West at 79th StreetNew YorkNY 10024USA City University of New York The Graduate Center365 Fifth AvenueNew YorkNY 10016USA Key laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of Sciences Nanjing Institute of Astronomical Optics & Technology National Astronomical ObservatoriesChinese Academy of Sciences

We perform a discrimination procedure with the spectral index diagram of TiO 5 and Ca h2＋Ca h3 to separate M giants from M dwarfs. Using the M giant spectra identified from lAMOST DR1 with high signal-to-noise ratio, we have successfully assembled a set of M giant templates, which show more reliable spectral features. Combining with the M dwarf/subdwarf templates in Zhong et al., we present an extended library of M-type templates which includes not only M dwarfs with a well-defined temperature and metallicity grid but also M giants with subtypes from M0 to M6. Then, the template-fitting algorithm is used to automatically identify and classify M giant stars from lAMOST DR1. The resulting catalog of M giant stars is cross-matched with 2MASS J h Ks and WISE W1/W2 infrared photometry. In addition, we calculated the heliocentric radial velocity of all M giant stars by using the cross-correlation method with the template spectrum in a zero-velocity rest *** the relationship between the absolute infrared magnitude MJ and our classified spectroscopic subtype, we derived the spectroscopic distance of M giants with uncertainties of about 40%. A catalog of 8639 M giants is provided. As an additional result of this analysis, we also present a catalog of 101 690 M dwarfs/subdwarfs which are processed by our classification pipeline.

关键词： stars: fundamental parameters—stars: late-type—catalogs—surveys

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概率与统计入门

概率与统计入门

原位(TiB+TiC)/Ti复合材料中TiB/Ti界面的微结构研究

1986年

作者：（美）奥尔德（Alder h.l.）（美）罗赛勒（Roessler E.B.）刘宗鹤译

书名原文: Introduction to probability and statistics。

ISBN: (纸本)4144·554

书名原文: Introduction to probability and statistics。

关键词：概率论数理统计

来源：汇雅图书（南通市图书馆... 评论

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电子显微学报 2001年第1期20卷 56-62页

作者：吕维洁张小农张荻吴人洁卞玉君方平伟 h.Mori 上海交通大学金属基复合材料国家重点实验室上海200030 上海钢铁研究所钛合金分所上海200940 日本大阪大学超高压电镜研究中心

本文利用透射电镜 ( TEM)和高分辨透射电镜 ( hRTEM)研究了利用钛与碳化硼之间的自蔓燃高温合成反应 ,经普通的熔炼工艺制备的 ( Ti B+Ti C) / Ti复合材料中 Ti B晶须与钛界面的微观组织结构。结果发现 :界面非常洁净 ,两侧晶体存在如... 详细信息

本文利用透射电镜 ( TEM)和高分辨透射电镜 ( hRTEM)研究了利用钛与碳化硼之间的自蔓燃高温合成反应 ,经普通的熔炼工艺制备的 ( Ti B+Ti C) / Ti复合材料中 Ti B晶须与钛界面的微观组织结构。结果发现 :界面非常洁净 ,两侧晶体存在如下平行关系 :[0 10 ]Ti B/ / [0 110 ]Ti,( 10 0 ) Ti B/ /( 2 110 ) Ti,( 0 0 1) Ti B/ / ( 0 0 0 2 ) Ti和 [0 0 1]Ti B/ / [0 110 ]Ti,( 0 10 ) Ti B/ / ( 2 110 ) Ti,( 2 0 0 ) Ti B/ / ( 0 0 0 2 ) Ti。利用凝固理论分析了 Ti B/ Ti界面微结构的形成机制 ,较好地解释了原位 ( Ti B+Ti C) / Ti复合材料中 Ti B/ Ti界面结合较好的原因。

关键词：原位合成钛基复合材料界面 TiB 界面微结构透射电镜高分辨和透射电镜自蔓燃高温合成 (TEM) (hRTEM)

Kinetic Rates of the Fischer Tropsch Synthesis on a Co/Nb_2O_5 Catalyst

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Journal of Natural Gas Chemistry 2006年第4期15卷 307-312页

作者： Víctor R.Ahón Paulo l.C.lage Carlos D.D.de Souza Fabiana M.Mendes Martin Schmal Federal University of Rio de Janeiro Programa de Engenharia Química COPPE/UFRJ C.P.6850221941-972Rio de JaneiroRJBrazil

The kinetics of the Fischer-Tropsch reaction over a Co/Nb2O5 catalyst in a fixed bed reactor was investigated experimentally. Experiments were carried out under isothermal and isobaric conditions （T=543 K, P=2.1 MPa） and under different conditions of several.h./CO feed molar ratio （0.49-4.79）, space velocities （0.2-3.8 h^-1）, mass of catalyst （0.3-1.5 g）, and CO conversion （10%-29%）. Synthesis gas conversion was measured and data were reduced to estimate the kinetic parameters for different langmuir-hinshelwood rate expressions. Differential and integral reactor models were used for the nonlinear regression of kinetics parameters. One of the rate equations could well explain the data. The hydrocarbon product distributions that were experimentally determined exhibited an unusual behavior, and a possible explanation was discussed.

关键词： Fischer-Tropsch natural gas kinetics selectivity

low-Cost high-Performance 10 G Transmitter and Receiver Optical Subassembly

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光学学报 2003年第S1期23卷 607-608页

作者： K.S. Cheng E. Cheung R. Cheung S. Cheung A. Chow C.W. Fan h.W. ho A. hui M.W.K. Mak S.K. lam S.l. lau K.S. lee A. Siu S.K. Yau F. Tong hong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaHong Kong Applied Science and Technology Research Institute 18F Gateway Tower 6 Tsim Sha Tsui Hong KongChinaAlso at the Information Engineering Department The Chinese University of Hong Kong Shatin Hong Kong China

We describe briefly here the recent R&D activities in the optical subassembly packaging technologies at the hong Kong Applied Science and Technology Research Institute (ASTRI). We have designed, developed and prototyped multiple of low-cost high performance packages for serial and parallel transmitters and receivers, in particular, the novel chip-in-plastic (CiP) package designed for 10G serial transmission for data communications.

关键词： for on as of be with high low-Cost high-Performance 10 G Transmitter and Receiver Optical Subassembly in