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还原温度与时间对铁基催化剂浆态床F-T合成性能的影响(英文)

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燃料化学学报 2005年第5期33卷 590-596页

作者：郝庆兰白亮郝栩相宏伟李永旺易凡徐斌富中国科学院山西煤炭化学研究所煤转化国家重点实验室山西太原030001 中国科学院研究生院武汉大学物理系湖北武汉430072

在浆态床反应器中考察了未还原催化剂以及在2.0℃和2.0℃的还原温度下还原时间对Fe/Cu/K/SiO2.化剂F-T合成反应性能的影响,采用M ssbauer谱研究了还原和反应后催化剂的物相组成。结果表明,在2.0℃延长还原时间或将还原温度升高到2.0℃... 详细信息

在浆态床反应器中考察了未还原催化剂以及在2.0℃和2.0℃的还原温度下还原时间对Fe/Cu/K/SiO2.化剂F-T合成反应性能的影响,采用M ssbauer谱研究了还原和反应后催化剂的物相组成。结果表明,在2.0℃延长还原时间或将还原温度升高到2.0℃均有利于催化剂的还原,2.0℃还原的催化剂的活性和稳定性明显高于未还原和2.0℃还原的催化剂,催化剂的运行稳定性与催化剂在反应过程中的流失量有密切关系。催化剂高温还原时烃产物分布倾向于生成低碳数的烃类,在相同的还原温度下,烃产物选择性随还原时间的延长向轻组分方向偏移。

关键词： F—T合成还原温度还原时间浆态床反应器铁基催化剂喷雾干燥

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Sun-coupled climate connection between eastern Asia and northern Atlantic

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Sun-coupled climate connection between eastern Asia and nort...

中国科学院地质与地球物理研究所2.04学术年会

作者： Ming Tan Institute of Geology and Geophysics,chinese academy of {2.,beijing,china State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,chinese academy of {2., Xi’an.Shaanxi,china Juzhi Hou Institute of Geology and Geophysics,chinese academy of {2.,beijing,china Tungsheng Liu Institute of Geology and Geophysics,chinese academy of {2..beijing,china State Key Laboratory of Loess and Quaternary Geology.Institute of Earth Environment.chinese academy of {2.. Xi’an.Shaanxi.china

[1]Few of annually resolved Proxy temperature records are reported to coincide with centennial

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A NEW LOW-COST DEMODULATOR FOR 2.4 GHZ ZIGBEE RECEIVERS

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Journal of Electronics(china) 2009年第2期26卷 252-257页

作者： Yu Yunfeng Meng Xin Xiao Shimao Ma Chengyan Ye Tianchun Institute of Microelectronics of chinese academy of {2.（CAS） beijing 10002. china Hangzhou Microelectronics of chinese academy of Science Ltd. Hangzhou 310053 china

A new low-cost demodulator for ZigBee receivers satisfying requirements of IEEE802.15.4 standard is presented,which is designed for ISM 2.4 GHz band and based on Zero-IF *** demodulator extracts symbols directly from baseband signal rather than recovering PN code chips,so its structure is *** main techniques are used to improve the performance of *** is Phase-Axis Crossing Detector(PACD) which detects the phase correlation of baseband *** other is symbol synchronization and sampling clock correction *** result shows that this demodulator performance,Symbol Error Rate(SER) and Packet Error Rate(PER) meet IEEE 802.15.4TM standard requirements and the demodulator can handle frequency offset in excess of 2.0 kHz,involving a Zero-IF receiver with a Noise Figure(NF) lower than 17 dB,which is easily imple-mented in standard CMOS technology.

关键词： ZigBee Demodulator Minimum Shift Keying(MSK) Low-cost Symbol synchronization

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Analysis of Ecosystem Service Value in Northeast Farm-Forest Ecotone in the 2. Century

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Analysis of Ecosystem Service Value in Northeast Farm-Forest...

2.10 International Conference on Computer and Communication Technologies in Agriculture Engineering (CCTAE 2.10)

作者： Wenjuan Wang Shuwen Zhang and Rongxin Deng Northeast Institute of Geography & Agroecology CAS Changchun 130012.china Graduated school of {2. academy of Science beijing 100049 china Department of Resources and Environmental sciences Henan University of Finance and Economics Zhengzhou 450002.china

Farm-forest ecotone plays an important role in the ecosystem,but at present,there is little research on *** this paper,choosing the Huinan county of farm-forest ecotone in the Northeast region,by the land use/cover data in 2.00 and 2.05,the land use/cover change and its ecosystem service value were *** concluded that the increase of farm is at the cost of the decrease of *** the forest to the farm is prominent in this *** farm at the high slope appear the trend of increase by analyzing the data in 2.00 and *** agricultural exploitation which lead to the decrease of forest make the ecosystem service value in 2.05 lower than 5.35*107 yuan in *** change of ecosystem service value of Shidaohe town,Chaoyang town,Huinan town,Jinchuan town are stronger than Huinan *** farm to forest for the steep slope farm will result in increase of ecosystem service value about 1.06*107 *** contrast,returning farm to grass can result in increase of ecosystem service value about 0.02.107 *** it needs to advocate returning farm to forest.

关键词： farm-forest ecotone land use/cover ecosystem service value Huinan county

Formation of Polycyclic Aromatic Hydrocarbons during Roasting Meat Process

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Formation of Polycyclic Aromatic Hydrocarbons during Roastin...

第五届全国环境化学大会

作者： Yamei Hui Minghui Zheng~* (Research Center for Eco-Environmental sciences,chinese {2. of sciences,beijing 100085, china

＜正＞Polycyclic aromatic hydrocarbons（PAHs） are a major class of environmentally hazardous organic compounds due to their *** studies have shown that cooking such as roasting and grilling may induce formation of PAHs,but these studies haven’t revealed the exact mechanism of PAHs *** levels of 16 PAHs in meat samples,experimentally roasted at different conditions（time, temperature and fat content）,were determined by isotope dilution GC-MS method. The results showed that PAH levels in roasted meat were strongly dependent on temperature and *** fat content didn’t seem to influence the PAH levels in roasted *** concentrations of high-ring PAHs and low-ring PAHs in roasted meat varied with temperature and time,and the trend is different（Fig.1 and Fig.2.. However,there was no obvious difference in PAH profiles of meat samples roasted at different conditions.

关键词： PAHs formation processing roasted meat

Cloning and Sequencing of a Gene Encoding GOBP2.in the Antenna of Spodoptera exigua

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Agricultural sciences in china 2002年第2期1卷 200-206页

作者： WANG Gui-rong, GUO Yu-yuan, XU Guang and WU Kong-ming( The Institute of Plant Protection , chinese academy of Agricultural {2. , beijing 100094 ) The Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing 100094

A pair of degenerate primers was designed, based on the comparison of five insects' GOBP2.gene sequences reported previously. A specific band (about 400bp in length) was amplified from cDNA of Spodoptera exigua antenna and another specific band (about 2.b in length) was amplified from genomic DNA. The two segments were cloned into T-easy vector, respectively. Results of sequencing and structural analysis showed that the full-length of GOBP2.exi ORF is 42.bp, 141 amino acid residues were encoded. The predicted MW and pI are 16.07ku and 5.09 .respectively. There are six conservative Cys locus in the sequence, which is the typical characteristic of OBPs. GOBP2.exi gene was inserted by two introns between amino acid residue 2. and 2. and between 82.and 83. The length of two introns is 160bp and 1403bp. Results of Northern blot showed that GOBP2.gene expressed specifically in the antenna of Spodoptera exigua, and the expression level is nearly equal in the antenna of male and female moths. The sequence was deposited in GenBank/EMBL and the accession number is AJ2.4809.

关键词： Spodoptera exigua Antenna GOBP2 Gene cloning

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Research on Spaceborne SAR Raw Data Simulation

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Research on Spaceborne SAR Raw Data Simulation

2.06 CIE International Conference on Radar

作者： Haixia Yue Boxiong Hu Ruliang Yang Institute of Electronics chinese academy of {2. beijing china

In Spaceborne SAR studying and designing,raw date simulation is a common *** method of Spaceborne SAR Raw Data Simulation is *** method is based on elliptical orbit *** on this method,a simulator has been applied to our Spaceborne SAR *** simulator can deal with real radar sensor parameters and orbit data,and the result of simulation is closed to the *** the end,the results of the point target and the three-dimensional （3D） extended scenes are *** shows that the Spaceborne SAR raw data simulation is very efficient.

关键词： Spaceborne SAR Simulation Elliptical orbit

Expression of a cotton profilin gene GhPFN1 is associated with fiber cell elongation

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Progress in Natural Science:Materials International 2002年第10期 76-79+83页

作者： LI Lihong, WANG Haiyun, LI Yan and XIA Guixian(Institute of Microbiology, chinese academy of {2., beijing 100080, china) Institute of Microbiology Chinese Academy of Sciences Beijing 100080 China

Profilin is an important actin-binding protein involved in regulating the organization of actin filaments. A cotton profilin gene (GhPFN1) that shares 71 % identity to profilin1 of Arabidopsis in its amino acid sequence was isolated. Semi-quantitative RT-PCR showed that GhPFN1 was expressed preferentially in the developing cotton fibers and reached the highest level at the fast elongation stage. The function of GhPFN1 in vivo was analyzed using the S. pombe system, and results suggested that GhPFN1 plays a role in fiber cell elongation.

关键词： actin cytoskeleton profllin cotton fiber S.pombe.

Fluid inclusions hidden in coesite-bearing zircons from ultrahigh-pressure metamorphic rocks in southwestern Sulu terrane, eastern china

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Fluid inclusions hidden in coesite-bearing zircons from ultr...

2.04年全国岩石学与地球动力学研讨会

作者： LIU Fulai, XU Zhiqin Institute of Geology, chinese academy of Geological {2., beijing 100087, china

Primary fluid inclusions, together with coesite mineral inclusions, are identified in the same zircon domains by Laser Raman spectroscopy, cathodoluminescence (CL) image and micro-texture analysis in paragneiss and retrogressive eclogite from the main drilling hole of chinese Continental Scientific Drilling Project, southwestem Sulu terrane. Most fluid inclusions are characterized by CO (gas) - HO (liquid) two-phase;a few by HO one-phase liquid inclusions. These features indicate that the eclogite and its country-rocks may not be located in the "dry system", but in the "Wet system" circumstance, when the Sulu terrane occurred ultrahigh-pressure metamorphism. The SHRIMP U-Pb dating suggests that the time for fluid and coesite inclusions trapped in metamorphic recrystallized zircon domains is about 2.0-2.6 Ma (the weighted mean = 2.3.7±4.3 Ma);this age is in agreement with many reported Triassic UHP metamorphic ages of 2.0-2.5 Ma from eclogites and gneissic rocks in Sulu-Dabie terrane. This research not only shows important significance for an in-depth study of the fluid property and evolutional feature, and fluid-rock interaction mechanism in Sulu-Dabie UHP terrane, but also provides a new method for exactly identifying the primary fluid inclusions preserved in zircons from the ultrahigh-pressure metamorphic rocks in the world.

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