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The Relationship Among Photoinhibition, Photooxidation and Early Aging at a Late Development Stage in Different Varieties with High Yield

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Agricultural Sciences in china 2002年第6期1卷 618-625页

作者： JIAO De-mao, LI Xia, HUANG Xue-qing and JI Ben-hua( Institute of Agrobiological Genetics and Physiology, Jiangsu Academy of Agricultural Sciences , nanjing 2.0014 , P.R. china Department of Biology, Nantong Normal College, Nantong 2.6007 , P.R. china) Institute of Agrobiological Genetics and Physiology Jiangsu Academy of Agricultural Sciences Nanjing 210014 P. R . China Department of Biology Nantong Normal College Nantong 226007 P. R . China

Using six high yield varieties from different ecological districts in china the parameters of Chl fluorescence, the performance of membrane lipid peroxidation and the reduction of Chl content in flag leaf under natural condition at the later developmental stages (from heading stage to mature stage). The results showed that Fv/Fm , decreased gradually, the excessive light energy led to the accumulation of active oxygen O2., H2.2.and the product of membrane-lipid peroxidation, MDA, which resulted in the reduction of Chl content and early aging due to photooxidation during the course of senescence of flag leaf. This phenomenon varied obviously in rice varieties. When comparina japonica tolerant to photooxidation, Fv/Fm in indica shanyou 63 susceptible to photoxidation decreased significantly. An increase of active oxygen and a sharp drop of Chl content, resulted in 'yellowish' early aging and influenced filling and setting of rice grain. The mechanism on early aging in indica was related to light and temperature conditions in filling stages. On a fine day (above 2.1), PS Ⅱ reaction center exhibited a dynamic change on revisable inactivation. Under strong midday light, PS Ⅱ function in indica exhibited obvious down-regulation and photoinhibition; Under strong light with low temperature, PS Ⅱ resulted in photodamage, showing early aging, which were related to the degradation of PSⅡ - D1 Protein and the inhibition of the endogenous protecting system such as Xanthophyll cycle and the enzymes of scavenging active oxygen. The results suggested that for a view of high-yield breeding, on the basis of a good type-plant, giving consideration to the utilization of heterosis and resistance to early aging, selecting japonica or a sterile line with japonice genotype as maternal was a breeding strategy worthy of being paid more attention.

关键词： Rice Characteristics of chl fluorescence Photoinhibition Photooxidation Early aging

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Three-dimensional structure determination of capsid of Aedes albopicus C6/36 cell densovirus

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Science china(Life Sciences) 2004年第3期47卷 224-228页

作者： CHENG Lingpeng1, CHEN Senxiong1, Jenifer M. Brannan2. Joanita Jakana3, ZHANG Qinfen1, Z. H. Zhou2.& ZHANG Jingqiang1 1. State Key Laboratory for Bio-control, Zhongshan university, Guangzhou 5102.5, china 2. Department of Pathology, Medicine university of Texas-Huston Medical School, Huston, TX77030, USA 3. National center for Macromolecular Imaging, Baylor College of Medicine, Houston, TX77, USA State Key Laboratory for Bio-control Zhongshan University Guangzhou 510275 China Department of Pathology Medicine University of Texas-Huston Medical School Huston TX77030 USA National center for Macromolecular Imaging Baylor College of Medicine Houston TX77 USA

The three-dimensional structure of capsid of Aedes albopictus C6/36 densovirus was determined to 14- resolution by electron cryomicroscopy and computer reconstruction. The triangulation number of the capsid is 1. There are 12.holes in each triangular face and a spike on each 5-fold vertex. The validity of the capsid and nucleic acid densities in the reconstructions was discussed.

关键词： electron cryomicroscopy, three-dimensional reconstruction, Aedes albopictus densovirus.

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电刺激小脑顶核治疗急性脑梗死

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现代医学 2004年第6期32卷 393-395页

作者：刘韶华周红施咏梅姜亚军东南大学附属中大医院神经内科江苏南京210009 江苏省中医院脑病中心江苏南京210029

目的　探讨电刺激小脑顶核治疗急性脑梗死的临床效果。方法　 82.急性脑梗死患者 ,随机分为治疗组和对照组 ,各 41例。两组均给予常规药物治疗 ,治疗组同时给予电刺激小脑顶核 ,观察两组治疗后神经功能缺损评分、血压、脉搏及血液流变... 详细信息

目的　探讨电刺激小脑顶核治疗急性脑梗死的临床效果。方法　 82.急性脑梗死患者 ,随机分为治疗组和对照组 ,各 41例。两组均给予常规药物治疗 ,治疗组同时给予电刺激小脑顶核 ,观察两组治疗后神经功能缺损评分、血压、脉搏及血液流变学变化。结果　治疗组神经功能缺损程度评分与对照组相比有极显著性差异 (P 0 .0 5 )。结论　电刺激小脑顶核对急性脑梗死有显著疗效。

关键词：治疗组电刺激小脑顶核急性脑梗死对照组血压治疗后神经功能缺损程度评分显著性差异结论目的

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Expression of Genes Involved in Ethylene Biosynthesis and Perception and Cell Wall Degradation in Relation to Pre-harvest Fruit Drop and Fruit Ripening in Apple(Abstract)

Expression of Genes Involved in Ethylene Biosynthesis and Pe...

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第二届全国果树分子生物学学术研讨会

作者： LI Jian-guo~(1,2. and YUAN Rong-cai~1 (1 Alson H.Smith,Jr.Agricultural Research and Extension center,595 Laurel Grove Road,Winchester,VA 2.602.USA 2.Physiological Lab for South china Fruits,South china Agricultural university,Wushan, Guangzhou 510642.P.R.china)

Temporal and spatial expression patterns of genes for ethylene biosynthesis,ethylene perception,and cell wall degradation in fruit and fruit abscission zones as well as fruit ethylene production during fruit maturation and ripening were examined in relation to fruit abscission and fruit softening in‘Golden Delicious’and‘Fuji’ *** abscission,fruit ethylene production and fruit softening increased rapidly during fruit maturation

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The Encompassing State—A Contribution of the East Asian Model

The Encompassing State—A Contribution of the East Asian Mod...

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文明的和谐与共同繁荣——北京论坛（2.04）

作者： Yao Yang china center for Economic Research,Peking {2.

The East Asian model was once hailed by the world as a miracle that other developing countries should aspire to(World Bank,1993).However, the slowdown of the Japanese economy and the Asian Financial Crisis seemed to have rendered the East Asian model *** particular,the pro-active role of the government that was once regarded as central to the East Asian

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Fragmentation Reactions of Adduct Ions [M+CH_3CO]^+ of Isomeric Phenylenediamines

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Chinese Chemical Letters 1999年第10期10卷 833-834页

作者： Zhi Li LI Shu Ying LIU Long Sheng LONG (1 6 Lab, Shandong Non-Metallic Material Research Institute, Jinan 2.00312.Chanchun institute of Applied Chemistry, the Chinese Academy of Sciences, Jilin 13002.3 center of analysis and Computation,{2. Pharmaceu Shandong Non Met Mat Res Lab Lab 6 Jinan 250031 Peoples R China Chinese Acad Sci Changchun Inst Appl Chem Changchun 130022 Peoples R China china Pharmaceut Univ Ctr Anal & Computat Nanjing 210009 Peoples R China

The dissociation routes of the adduct ions [M+CH3CO]+ formed by ion-moleculereaction of isomeric phenylenediamines with acetyl ion from acetone under chemical ionizationcondition were investigated by using collision-induced dissociation (CID) technique performed ation kinetic energies of 40eV. The adduct ions are intermediate ion-neutral complexes.

关键词： Collision-induced dissociation phenylenediamine ion-neutral complex.

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Carrier tracking algorithm based on extended Kaman filter for inter-satellite link

Carrier tracking algorithm based on extended Kaman filter fo...

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第二届中国卫星导航学术年会

作者： Li Li-min1,2.Gong Wen-bin1,Liu Hui-jie1,2.Yu Jin-pei1,2.1.Shanghai Engineering center for Microsatellites,Shanghai 2.0050,china 2.Shanghai Institute of Microsystem and Information Technology,Chinese Academy ofSciences,Shanghai 2.0050,china

＜正＞Inter-satellite link is the core technology of autonomous navigation,and the different orbits satellites are in high dynamic and low SNR *** carrier tracking loop suffers a compromise between loop bandwidth and dynamic performance,and is difficult to satisfy both tracking accuracy and dynamic performance in high dynamic *** this paper,a carrier tracking algorithm based on extended Kalman filter（EKF） is *** to the linear recursive relationship among carrier phase,Doppler frequency,change rate of Doppler frequency to establish system model,and use receiver I/Q branch observations to update carrier phase estimates based on EKF *** phase estimates are feedback to control carrier NCO to obtain carrier synchronization. Simulation and analysis results show that this algorithm has higher tracking accuracy under high dynamic and low SNR conditions,even in the case of transient signal blockage the loop can maintain lock.

关键词： inter-satellite link carrier tracking extended Kaman filter Costas loop

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The Effects of Organic p-Type Dopant F4-TCNQ on Hole Transport Material 4,4,4-Tris(N-2.naphthyl)-N-phenyl-amino)-triphenylamine

The Effects of Organic p-Type Dopant F4-TCNQ on Hole Transpo...

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全国第八届有机固体电子过程暨华人有机光电功能材料学术讨论会

作者： Baoxiu Mi,Zhiqiang Gao~*,Wei Huang (Institute of Advanced Materials(IAM),Jiangsu Engineering center for Flat-Panel Displays and Solid-State Lighting,nanjing {2. of Posts and Telecommunications No.9 Wenyuan Road,Yadong Xincheng Distribution,nanjing 2.0046)

Strong electron acceptor F4-TCNQ,2.3,5,6-tetrafluoro-7,7,8,8-tetra- cyanoquinodimethane,is the state-of-the -art p-type dopant material in organic *** with the hole transport material 2.TNATA, 4,4′,4″-Tris(N-(2.naphthyl)-N-phenyl-amino)-triphenylamine,a promising chemically doped hole transport system can be *** this study,the mechanism of chemically doping is determined to be strongly related to

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LARGE-SCALE DISTRIBUTION OF GALAXIES WITH DIFFERENT LUMINOSITIES

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Science china Mathematics 1989年第6期32卷 716-725页

作者：夏晓阳邓祖淦周又元 Department of Physics Tianjin Normal University Department of Physics Graduate School University of Science and Technology of China Beijing center for Astrophysics University of Science and Technology of China Hefei

Based on the data of CfA redshift survey, the spatial 2.point correlation function ofgalaxies with different luminosities has been analysed and the results have been comparedwith those in literature. It is found that galaxies with different luminosities have obvious dif-ferences in their large-scale distribution. Although all the correlation functions can be appro-ximated by the power law, the absolute values of the power indices, clustering strength andclustering scales increase with the luminosity of galaxies. Further investigation of the large-scale distribution of galaxies with different luminosities will set new constraints on the dis-tribution of matter in the universe and the origin and evolution of galaxies.

关键词： galaxy large-scale structure cosmology

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跨声速压气机转子叶尖泄漏涡非定常特性数值研究

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航空动力学报 2018年第2期33卷 411-421页

作者：刘若阳侯安平倪奇峰韩光辉北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室北京100191 先进航空发动机协同创新中心北京100191

为了研究跨声速单转子压气机系统叶尖泄漏涡的非定常特性,选取Rotor 67孤立转子为研究对象,针对不同背压工况与不同转速工况进行了非定常数值模拟。结果表明:在每一转速状态都存在一非定常边界,其将特性线分为定常部分和非定常部分。当... 详细信息

为了研究跨声速单转子压气机系统叶尖泄漏涡的非定常特性,选取Rotor 67孤立转子为研究对象,针对不同背压工况与不同转速工况进行了非定常数值模拟。结果表明:在每一转速状态都存在一非定常边界,其将特性线分为定常部分和非定常部分。当转子运行在特性线非定常部分时,随着背压提高,叶尖泄漏涡脉动频率逐渐减小。这是由于背压提高使叶尖前缘负荷变小,叶尖泄漏涡的驱动力也变小。叶尖泄漏涡的频率特征与转子转速息息相关。高转速状态时叶尖泄漏涡主要表现出低频特征,低转速状态时叶尖泄漏涡主要表现出高频特征。这是由于转速不同,叶尖激波的脱体程度不同,激波对于叶尖泄漏涡的激励位置也不同。由非定常叶尖泄漏涡引起的压力波的周向传播速度在各转速下表现出较强的规律性。随着流量系数的减小,压力波波速呈线性减小趋势,且各转速下减小的速率大致相同。且在波速-流量系数曲线中,各转速的非定常状态起始点基本位于同一条直线。

关键词：叶尖泄漏涡非定常数值模拟非定常边界非定常特性压力波

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