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Research progress on electrical signals in higher plants

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Progress in Natural Science:Materials International 2009年第5期19卷 531-541页

作者： Xiaofei Yana, Zhongyi Wang a, Lan Huang a, Cheng Wang b, Ruifeng Hou b, Zhilong Xu b, Xiaojun Qiao b a college of Information and Electrical Engineering, china Agricultural university, Beijing 100083, china b National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, china [a]college of Information and Electrical Engineering China Agricultural University Beijing 100083 China [b]National Engineering Research Center for Information Technology in Agriculture Beijing 100097 China

This review introduces the characteristics of electrical signals in higher plants and their corresponding physiological significance, and describes in detail the impact of environmental factors (e.g. light and temperature) on the electrical potential of the plants. Also, we evaluate the measurement techniques used for electrical signals in plants, including intracellular measurement, extracellular measurement, measurement of the ion channel based on the patch-clamp technique and on the non-invasive microelectrode vibrating probe technique. We also give a brief review of the applications of these methods for investigating electrical signals in plants. The ionic mechanism of electrical activity in plants is then discussed in terms of environmental response in higher plants, and this is used to provide a theoretical basis for quantitative description of the electrical signals in plants. A model for interpretation of the electrical signal mechanisms in higher plants is discussed, but further experiments are required for the verification of this model.

关键词： Ion channel Temperature-induced Light-induced Ion mechanism Measurement technology

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一般球对称带电蒸发黑洞的温度

物理学报 2002年第5期51卷 1144-1148页

作者：宋太平姚国政北京师范大学物理学系

从视界附近的Klein Gordon方程出发 ,准确地定出了一般球对称带电蒸发黑洞的Hawking温度和辐射谱 ,同时计算出事件视界方程 .所得结果与用零曲面方程得到的结果一致 .

关键词：一般球对称带电蒸发黑洞温度视界辐射谱热力学

Silica nanospheres formation induced by peroxidase-catalyzed phenol polymerization

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Progress in Natural Science:Materials International 2003年第7期 23-26页

作者： FANG Jiangyu, WANG He, CHEN Yang and ZHANG Fusuo (1. college of Resources and Environmental Sciences, china Agricultural university, Beijing 100094, china 2. college of Agronomy, Gansu Agricultural university, Lanzhou 730070, china) college of Resources and Environmental Sciences，china Agricultural university，Beijing 100094，china college of Agronomy，Gansu Agricultural university，Lanzhou 730070，china college of Resources and Environmental Sciences，china Agricultural university，Beijing 100094，china college of Agronomy，Gansu Agricultural university，Lanzhou 730070，china

To examine whether lignin-like compound is correlated with silica precipitation in grass, a series of simulated chemical experiments were carried out at ambient temperature and pressure, close to cell wall pH, with phenol polymerization catalyzed by peroxi-dase in silicon solution. The experiments showed that phenol polymer (a kind of lignin-like substance) caused silica nanosphere precipitation similar to those caused by protein in diatom cell wall previously reported by other authors. The sphere diameter varied with different kinds of phenol and the concentrations of phenol and silicon. Silicon precipitation had phenol and silicon saturation effect, meaning that when the concentration ratio of soluble silicon to phenol exceeded a certain value, the amount of silicon precipitation would decrease.

关键词： silicon phenol peroxidase.

Harmine induces apoptosis in HepG2 cells via mitochondrial signaling pathway

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Hepatobiliary & Pancreatic Diseases International 2011年第6期10卷 599-604页

作者： Ming-Rong Cao,Qiang Li,Zhi-Long Liu,Hui-Hui Liu,Wei Wang,Xiao-Li Liao,Yun-Long Pan and Jian-Wei Jiang Department of General Surgery,First Affiliated Hospital,Jinan university,Guangzhou 510632,china Department of Anesthesiology,First Affiliated Hospital,Guangzhou university of TCM,Guangzhou 510632,china Department of Biochemistry,Medical college of Jinan university,Guangzhou 510632,china Department of General Surgery First Affliated Hospital Jinan University Guangzhou 510632 China Department of Anesthesiology First Affliated Hospital Guangzhou University of TCM Guangzhou 510632 China Department of Biochemistry Medical College of Jinan University Guangzhou 510632 China

BACKGROUND:Harmine has antitumor and antinociceptive effects,and inhibits human DNA *** no detailed data are available on the mechanisms of action of harmine in hepatocellular *** study aimed to investigate the effects of harmine on proliferation and apoptosis and the underlying mechanisms in the human hepatocellular carcinoma cell line ***:The proliferation of HepG2 cells was determined by the cell counting kit-8 (CCK-8) assay and the clone formation *** morphology of HepG2 cells was examined using fluorescence microscopy after Hoechst 33258 staining Annexin V/propidium iodide (PI) was used to analyze apoptosis and PI to analyze the cell *** blotting was used to assess expression of the apoptosis-regulated genes Bcl-2,Bax,Bcl-xl,Mcl-1,caspase-3,and caspase-9 Mitochondrial transmembrane potential (Ψ m) was determined using ***:Harmine inhibited the proliferation of HepG2 cells in a dose-dependent *** 33258 staining revealed nuclear fragmentation and chromosomal condensation,cell shrinkage,and attachment loss in HepG2 cells treated with *** percentage of the sub/G1 fraction was increased in a concentration-dependent manner,indicating apoptotic cell *** staining showed that harmine changed the cell cycle distribution,by decreasing the proportion of cells inG0/G1 and increasing the proportion in S and G2/*** induced apoptosis in a concentration-dependent manner,with rates of 20.0%,32.7% and 64.9%,***-1 revealed a decrease in Ψ *** of HepG2 cells was associated with caspase-3 and caspase-9 activation,down-regulation of Bcl-2,Mcl-1,and Bcl-xl,and no change in ***:Harmine had an anti-proliferative effect in HepG2 cells by inducing *** signal pathways were involved in the *** cancer-specific selectivity shown in this study suggested that harmine is a promising novel drug for human hepatocellular carcinoma.

关键词： hepatocellular carcinoma harmine Bcl-2 protein caspase-3 apoptosis

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β-二酮二氰乙基化合物的酮解反应

化学学报 1985年第8期43卷 793-795页

作者：黄化民任仲皎吉林大学化学系吉林大学化学系长春

甲基酮与丙烯腈反应可以得到一氰乙基、二氰乙基或多氰乙基化产物。据文献报道,丙酮与丙烯腈反应可以得到少量的4-乙酰基庚二腈,产率约为3.7％,其他4-酰基庚二腈的合成方法还未见报道。我们发现由β-二酮的氰乙基化反应得到的β-二酮二... 详细信息

甲基酮与丙烯腈反应可以得到一氰乙基、二氰乙基或多氰乙基化产物。据文献报道,丙酮与丙烯腈反应可以得到少量的4-乙酰基庚二腈,产率约为3.7％,其他4-酰基庚二腈的合成方法还未见报道。我们发现由β-二酮的氰乙基化反应得到的β-二酮二氰乙基化产物1a～c,在碳酸钠水溶液中酮解可以得到4-酰基庚二腈2a～c,产率为59～82％。如果1a～c在氢氧化钾水溶液中水解,则得4-酰基庚二酸3a～c。2a～c与2,4-二硝基苯肼反应得到了相应的苯腙4a～c,2a～c经KOH水解亦得3a～c。

关键词：庚二酮乙基化合物二元酮乙酞基丙烯睛庚二酸蒲桃酸二元羧酸产率实测值 ppm 反应重结晶再结晶(冶金) 甲基链烷基异丁酸二硝基苯乙酸乙醋

Students recreational sports awareness of investigation and study

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Students recreational sports awareness of investigation and ...

The Design and Property Analysis of Small Wave Bounded EMP Simulator

第五届全国青年体育科学学术会议、第二届中国体育博士高层论坛

作者： HUANG Zhao-yuan~1 LI Yang~2 (1.changchun teacher's college sports academy jilin changchun 130032 2.Continuous sun teacher's college sports and the continuous healthy educational college Sichuan sun 621000)

1 Research purposes With the progress of society, leisure and everyone will be closely related to the survival of the field, leisure industry will become a country's pillar industries. college students as the main force of the future society, the community as a whole change in consumption structure and future public recreational sports

关键词： Students recreational sports awareness of investigation and study

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The Design and Property Analysis of Small Wave Bounded EMP S...

封闭与开放——研究哈耶克理论的两个前提性问题

2010 International Conference on Computer,Mechatronics, Control and Electronic Engineering (CMCE 2010)

作者： Jinliang Cai,Bo Wang,Fengye Hu,Delong Zeng School of Communication Engineering jilin university changchun,china Gang Guo Department of Control Engineering Avigation university of Air-Force changchun,china

A small bounded wave electromagnetic pulse(EMP) simulator is designed in this *** maximum height is *** simulator provides the simulated high electromagnetic pulse(HEMP) environment for testing smaller objects such as cable and other electrical equipment in vehicles,under the condition of low source *** adopts electromagnetic field modeling software MicroStripes to analysis property of the *** of simulation show that the electric field distribution in the working volume is uniform under the excitation of double exponential voltage pulse(peak voltage of the pulse is 12kV).The property of small bounded wave EMP simulator satisfies demand of relational *** is enough for testing smaller objects.

关键词： Electromagnetic pulse double exponential model small bounded wave simulator electric field distribution

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法制与社会发展 2008年第2期14卷 123-131页

作者：刘小平吉林大学理论法学研究中心吉林长春130012

在当下对哈耶克理论的讨论中,有两个问题对解读哈耶克有着前提性意义,一是意识形态的"封闭"与"开放"的问题;二是哈耶克的理论及对它的解读相对于现代政治哲学讨论背景的"封闭"与"开放"问题。在现代政治哲学论争的视野下,如何开放性地思... 详细信息

在当下对哈耶克理论的讨论中,有两个问题对解读哈耶克有着前提性意义,一是意识形态的"封闭"与"开放"的问题;二是哈耶克的理论及对它的解读相对于现代政治哲学讨论背景的"封闭"与"开放"问题。在现代政治哲学论争的视野下,如何开放性地思考哈耶克理论所具有的独特意义和可能潜力,正是哈耶克理论是否仍具有生命力的关键。目前对哈耶克的解读方式,有使哈耶克的理论沦为现代政治哲学论争之注脚的危险。由此,对哈耶克的理论解读需要一种"个殊化"的研究进路。

关键词：解读开放封闭个殊化进路

Synthesis of Chiral Amino Cyclic Phosphoric Acids

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Wuhan university Journal of Natural Sciences 2000年第4期5卷 497-499页

作者： Zhang Zhan, Hu Quan-yuan, Deng Fa-da, Shu Jia-you, He Jian-she, Hu Xian-ming college of chemistry and Environmental Science, Wuhan university, Wuhan 430072 college of chemistry and Environmental Science Wuhan UniversityWuhan 430072

Chiral amino cyclic phosphoric acids, 5-amino-2-hydroxy-4-(4-nitrophenyl)-1,3,2-dioxaphosphorinane 2-oxide and 2-hydroxy-4-(4-methylsulfonylphenyl)-5-phthalimido-1,3,2-dioxaphos phorinane 2-oxide are synthesized in good over yields (64.2%and 72.8%respectively) from 2-amino-1-aryl-1,3-propanediols. The different reaction conditions are necessary in hydrolysis reactions of amino cyclic phosphonyl chlorides.

关键词： chiral amino cyclic phosphoric acid amino diols synthesis