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Multiple cropping and soil fertility in sustainable production of paddy fields

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Chinese Rice Research Newsletter 1991年第3期 5-6页

作者： LI shiye Institute of Soil and Fertilizer,Zhejiang academy of Agricultural sciences,Hangzhou 310021,China

Multiple cropping has been popularized on morethan two thirds of the total area of paddy fields inSouth *** demands more nutrients due tohigher cropping ***,how to keepmoderately higher yields of multiple crops and to

关键词： soil Multiple cropping and soil fertility in sustainable production of paddy fields

CONSTRUCTION OF Sesbania rostrata COSMID GENOMIC LIBRARY AND MOLECULAR CLONING OF LEGHEMOGLOBIN GENE

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Science China Chemistry 1989年第12期32卷 1457-1464页

作者：刘阳范云六 Laboratory of Molecular Biology. Biotechnology Research Center Chinese Academy of Agricultural Sciences Beijing 100081 PRC

Using plant mini-Ti cosmid pEND4K, the cosmid genomic library of Sesbania rostratawas constructed. Sizes of plant DNA inserts in clones were 25- 33 kb. The restrictionmapping showed that different recombinant involved various types of plant DNA insert. 4clones containing leghemoglobin gene sequence of S. rostrata were obtained by in situ hy-bridization of colonies. The cloning of leghemoglobin gene sequence has been confirmedby plasmid DNA dot hybridization and Southern blot hybridization.

关键词： Sesbania rostrata plant cosmid genomic library leghemoglobin gene molecular cloning

Brain structure in diving players on MR imaging studied with voxel-based morphometry

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Progress in Natural Science:Materials International 2009年第10期19卷 1397-1402页

作者： Gaoxia Wei a,Jing Luo a,Youfa Lib a Key Laboratory of Mental Health,Institute of Psychology,Chinese academy of sciences,Beijing 100101,China b National Key Laboratory of Cognitive Neurosciences and Learning,Beijing Normal University,Beijing 100875,China [a]Key Laboratory of Mental Health Institute of Psychology Chinese Academy of Sciences Beijing 100101 China [b]National Key Laboratory of Cognitive Neurosciences and Learning Beijing Normal University Beijing 100875 China

We adopted professional diving players as a typical subject pool to explore whether structural brain differences relative to motor skill acquisition exist between highly skilled athletes and *** on the voxel-based morphometric(VBM) technique,structural MRIs of the brains of 12 elite diving players with professional training were analyzed and compared with those of control subjects without any professional physical *** players showed significantly increased gray matter density in the thalamus and left pre-central gyrus than control ***,future researches are needed to prove the contribution of preposition and *** also suggests that athletes as the subject pool could form a new subject pool to explore plastic change induced by motor skill acquisition.

关键词： Cortical plasticity Motor skill acquisition Voxel-based morphometry Diving players

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超常与常态儿童记忆和记忆组织的比较研究

心理学报 1990年第2期22卷 127-134页

作者：施建农中国科学院心理研究所

本实验以超常儿童(20名,平均年龄为11岁2个月)和常态儿童(20名,平均年龄为11岁3个月)为被试,以数字和图形为实验材料对超常儿童和常态儿童的记忆和记忆组织特点和差异作了初步的比较研究。结果是;(1)超常儿童不仅在回忆量上比常态儿童优... 详细信息

本实验以超常儿童(20名,平均年龄为11岁2个月)和常态儿童(20名,平均年龄为11岁3个月)为被试,以数字和图形为实验材料对超常儿童和常态儿童的记忆和记忆组织特点和差异作了初步的比较研究。结果是;(1)超常儿童不仅在回忆量上比常态儿童优异,更主要的是在记忆速度和记忆组织上比常态儿童发展得更好;(2)儿童的记忆与记忆组织有密切相关,尤其是记忆速度与记忆组织之间有显著相关;(3)实验表明同时使用回忆量和记忆速度作为记忆成绩的指标更为合适,能更好地说明儿童记忆的特点。

关键词：记忆组织比较研究记忆速度差异超常儿童记忆

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神经生长因子结构与功能研究进展

生物化学与生物物理进展 1997年第4期24卷 295-299页

作者：俞萍柳川王会信军事医学科学院基础医学研究所北京100850

神经生长因子 (NGF)是神经营养因子家族的典型代表 ,它控制着脊椎动物周围和中枢神经系统中部分神经元的发育和存活 .NGF的三维结构是以“胱氨酸结”和 β折叠为基础 ,它以二聚体的形式结合细胞表面的受体从而发生生物学效应 .参与这些... 详细信息

神经生长因子 (NGF)是神经营养因子家族的典型代表 ,它控制着脊椎动物周围和中枢神经系统中部分神经元的发育和存活 .NGF的三维结构是以“胱氨酸结”和 β折叠为基础 ,它以二聚体的形式结合细胞表面的受体从而发生生物学效应 .参与这些反应的氨基酸残基已通过化学修饰和定点突变法加以确定 ,这有助于更进一步理解其结构与功能的关系 .

关键词：神经生长因子结构功能

Facile Synthesis of Amidines via Intermolecular Reductive Coupling of Nitriles with Azobenzene Promoted by Samarium Diiodide

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Chinese Chemical Letters 2000年第6期11卷 495-498页

作者： Zhi Fang LI Ping LU Yong Min ZHANG(Department of Chemistry, Zhejiang University (Xixi campus), Hangzhou 310028Laboratory of Organometallic Chemistry, Institute of Organic Chemistry Chinese academy of sciences, Shanghai 200032) Zhejiang Univ Dept Chem Hangzhou 310028 Peoples R China Chinese Acad Sci Inst Organ Chem Organomet Chem Lab Shanghai 200032 Peoples R China

The intermolecular reductive coupling of nitrites with azobenzene induced by SmI2 was studied. Amidine derivatives were prepared in good yields under neutral and mild conditions.

关键词： synthesis samarium amidines nitriles azobenzene

纹外皮层PMLS区反馈投射对初级视皮层神经元反应特性的影响

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生物化学与生物物理进展 2011年第9期38卷 821-829页

作者：李宇辉李兵中国科学院生物物理研究所脑与认知科学国家重点实验室北京100101 中国科学院研究生院北京100049

神经系统中存在大量下行投射,与上行输入一起形成复杂的前馈与反馈回路,调控神经信号的传导和处理,但目前对皮层内反馈投射的功能作用认识还比较薄弱.通过微量注射抑制性神经递质γ-氨基丁酸(γ-aminobutyric acid,GABA),使猫纹外皮层... 详细信息

神经系统中存在大量下行投射,与上行输入一起形成复杂的前馈与反馈回路,调控神经信号的传导和处理,但目前对皮层内反馈投射的功能作用认识还比较薄弱.通过微量注射抑制性神经递质γ-氨基丁酸(γ-aminobutyric acid,GABA),使猫纹外皮层后内侧外上雪氏区(area posteromedial lateral suprasylvian,PMLS)局部可逆性失活,使用胞外记录方法,研究初级视皮层17区神经元反应特性的变化.实验结果显示,PMLS区失活后,17区细胞对运动刺激的反应总体减弱,反应的相对稳定性基本不变,最高发放率/自发之比有所下降.与此同时,细胞的方向选择性指数减小,朝向选择性无显著变化.除少数"双向"反应细胞外,绝大部分细胞的最优方向基本不变.进一步分析发现,细胞对各个方向刺激的反应普遍下降,最优方向上的下降程度最大,是导致方向选择性减弱的主要原因.这些结果表明,PMLS区反馈投射可增强初级视皮层的方向选择性,而对朝向选择性影响有限.这一作用特点体现了PMLS区在皮层中偏重处理运动视觉信息的功能.

关键词： PMLS区反馈投射初级视皮层方向选择性朝向选择性

Investigation on Third-order Optical Nonlinearity of Ni-Azo Metal Complex by the Z-scan Technique

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Chinese Journal of Lasers 2000年第3期9卷 42-46页

作者： LIANG Zhijian-1 WANG Shuangqing-2 TANG Fulong-1 GAN Fuxi-1 YU Baolong-3 ( -1 Shanghai Institute of Optics and Fine Mechanics, The Chinese academy of sciences, Shanghai 201800, China -2 Institute of Photographic Chemistry, The Chinese academy 中科院上海光学精密机械所上海中科院感光化学所北京河南大学河南开封

Third-order optical nonlinearity of Ni-azo metal complex i n solution was investigated by the Z-scan technique with 38 ps laser pulse excitation at 1.064 μm. Self-defocusing was observed, and third-order nonlinear susceptibility χ- (3) pure and the second hyperpolarizability 〈γ〉 were measured to be 1.8×10- -11 esu and 1.0×10- -32 esu, respectively.

关键词： third-order optical nonlinearity Z-scan Ni-Azo metal complex

SALVIANOLIC ACID H,A NEW DEPSIDE FROM SALVIA CAVALERIEI ***

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Chinese Chemical Letters 1993年第6期4卷 501-504页

作者： Hai Jun ZHANG Lian Niang LI Institute of Materia Medica,Chinese academy of Medical sciences 1 Xian Nong Tan Street,Beijing 100050,China

A new depside named salvianolic acid H was isolated from the aqueous extract of Salvia cavaleriei ***,along with salvianolic acid A,B,C,isosalvianolic acid C,lithospermic acid, rosmarinic acid,R-(+)-β-(3,4-dihydroxyp... 详细信息

关键词： OCH CC LH SALVIANOLIC ACID H,A NEW DEPSIDE FROM SALVIA CAVALERIEI VAR.SIMPLICIFOLIA VAR ACID