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Role of GA_3,GA_4 and Uniconazole-P in Controlling Gravitropism and Tension Wood Formation in Fraxinus mandshurica Rupr. var. japonica Maxim. Seedlings

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Journal of Integrative Plant Biology 2008年第1期50卷 19-28页

作者： sha Jiang ke Xu Yong-Zhou Wang Yan-Ping Ren Song Gu College of Life Sciences Nankai University Tianjin 300071 China

GA3 and GA4 （gibberellins） play an important role in controlling gravitropism and tension wood formation in woody angiosperms. In order to improve our understanding of the role of GA3 and GA4 on xylem cell formation and the G-layer, we studied the effect of GA3 and GA4 and uniconazole-P, which is an inhibitor of GA biosynthesis, on tension wood formation by gravity in Fraxinus mandshurica Rupr. var. japonica Maxim. seedlings. Forty seedlings were divided into two groups; one group was placed upright and the other tilted. Each group was further divided into four sub-groups subjected to the following treatments： 3.43 x 10-9 lunol acetone as control, 5.78 x 10-8 lunol gibberellic acid （GA3）, 6.21 x 10-8 lunol GA4, and 6.86 x 10-8 lunol uniconazole-P. During the experimental period, GAs-treated seedlings exhibited negative gravitropism, whereas application of uniconazole-P inhibited negative gravitropic stem bending. GA3 and GA4 promoted wood fibers that possessed a gelatinous layer on the upper side, whereas uniconazole-P inhibited wood formation but did not inhibit the differentiation of the gelatinous layer in wood fibers on the upper side. These results suggest that：（i） both the formation of gelatinous fibers and the quantity of xylem production are important for the negative gravitropism in horizontally-positioned seedlings; （ii） GA3 and GA4 affect wood production more than differentiation of the gelatinous layer in wood fibers; G-layer development may be regulated by other hormones via the indirect-role of GA3 and GA4 in horizontally-positioned F. mandshurica seedlings rather than the direct effect of GAs; and （iii） the mechanism for upward wood stem bending is different to the newly developed shoot bending in reaction to gravity in this species.

关键词： GA3, GA4 gelatinous layer gravitropism Fraxinus mandshurica var. japonica Maxim. seedlings tension wood formation uniconazole-P.

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Synthesis and characterization of triblock copolymer by combining enzymatic condensation polymerization and ATRP

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Chinese Science Bulletin 2006年第9期51卷 1065-1068页

作者： LI Dongshuang sha ke LI Yapeng WANG Shuwei WANG Jingyuan Department of Chemistry Jilin University Changchun 130023 China

The polyester poly(1,10-decanediol /1, 10-sebacate) (PSD) was synthesized by means of Novozyme 435 catalyzed condensation polymeriza- tion of 1,10-decanediol and 1,10-sebacic acid. Both hydroxyl chain ends of the resulting PSD were modi- fied by esterification with α-bromopropionyl bromide to obtain difunctional macroinitiator, which was sub- sequently used in the ATRP of S t using CuCl/2, 2′- bipyridine (bpy) as the catalyst system to afford the triblock copolymer, polystyrene-block-poly(1,10-dec- anediol/1,10-sebacate)-block-polystyrene (PS t-b-PSD- b-PSt). Molecular weight distribution and structure of the resulting triblock copolymer was confirmed by Waters 410 Gel permeation chromatography (GPC) and measurements of nuclear magnetic resonance (NMR) analysis.

关键词：缩聚聚合物结合酶 ATRP 嵌段共聚

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Low-frequency repetitive transcranial magnetic simulation prevents chronic epileptic seizure

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Neural Regeneration Research 2013年第27期8卷 2566-2572页

作者： Yinxu Wang Xiaoming Wang sha ke Juan Tan Litian Hu Yaodan Zhang Wenjuan Cui Department of Neurology Affiliated Hospital of North Sichuan Medical College

Although low-frequency repetitive transcranial magnetic simulation can potentially treat epilepsy, its underlying mechanism remains unclear. This study investigated the influence of low-frequency re-petitive transcranial magnetic simulation on changes in several nonlinear dynamic electroenceph-alographic parameters in rats with chronic epilepsy and explored the mechanism underlying repeti-tive transcranial magnetic simulation-induced antiepileptic effects. An epilepsy model was estab-lished using lithium-pilocarpine intraperitoneal injection into adult Sprague-Dawley rats, which were then treated with repetitive transcranial magnetic simulation for 7 consecutive days. Nonlinear elec-electroencephalographic parameters were obtained from the rats at 7, 14, and 28 days post-stimulation. Results showed significantly lower mean correlation-dimension and Kolmogo-rov-entropy values for stimulated rats than for non-stimulated rats. At 28 days, the complexity and point-wise correlation dimensional values were lower in stimulated rats. Low-frequency repetitive transcranial magnetic simulation has suppressive effects on electrical activity in epileptic rats, thus explaining its effectiveness in treating epilepsy.

关键词： neural regeneration repetitive transcranial magnetic stimulation electroencephalogram nonlinearanalysis nonlinear parameters epilepsy epileptic seizure epileptic discharge grant-supportedpaper neuroregeneration

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Ethylene Evolution Changes in Tilted Fraxinus mandshurica Rupr. var. japonica *** in Relation to Tension Wood Formation

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Journal of Integrative Plant Biology 2009年第7期51卷 707-713页

作者： sha Jiang ke Xu Na Zhao Shu-Xin Zheng Yan-Ping Ren Yu-Bao Gao Song Gu College of Life Sciences Nankai University Tianjin 300071 China

The effects of ethylene on tension wood formation were studied in 3-year-old Fraxinus mandshurica Rupr. var. japonica Maxim. seedlings in two separate experiments. In experiment 1, ethylene evolution of buds and stems was measured using gas chromatography after 0, 2, 4, 7, 14, and 21 d of treatment; in experiment 2, both aminoethoxyvinylglycine （AVG） and AgNO3 were applied to the horizontally-placed stems, and the cell numbers on sites of applications were measured after 40 d. Ethylene evolution from buds was found to be much greater in tilted seedlings than in upright ones. The cell numbers of wood fibers in shoots and 1-year-old stems were reduced in treatments with 12.5×10^-7μmol/L AVG, 12.5×10^-8μmol/L AVG, and 11.8×10^-8μmol/Lmol/L AgNO3; whereas the horizontal and vertical diameters were reduced by treatment of 12.5×10^-7μmol/L AVG. Ethylene evolutions of shoots and 1-year-old stems were inhibited greatly in comparison with the control by applying 12.5×10^-7μmol/L AVG. The formation of a gelatinous layer of wood fibers was affected by neither AVG nor AgNO3 application. These results suggest that ethylene regulates the quantity of wood production, but does not affect G-layer formation in F. mandshurica Rupr. *** Maxim. seedlings.

关键词： ethylene evolution Fraxinus mandshurica inhibitors tension wood formation

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Andreev reflection and tunneling spectrum in a superlattice of metal-superconductor junctions

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Frontiers of physics 2013年第1期8卷 50-54页

作者： W. LiMing Jia-Yun Luo Xiao-Xue Cai ke sha Cheng-Ping Yin Liang-Bin Hu Department of Physics and Laboratory of Quantum Information Technology School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510006 China

The tunneling spectrum of an electron and a hole in a superlattice of NS junctions is computed using the BTK approach and the transfer matrix method. It shows sharp resonances at some energies above the superconducting gap. The sharper the resonance is the more layers the superlattice has. We find for the first time a mechanism to balance the incident and outgoing currents on the superlattice by averaging over the phase between the incident electron and the incident hole. This mechanism is more natural and physical than those in literatures.

关键词： Andreev reflection metal-superconductor junction BTK approach

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Coulomb-assisted nonlocal electron transport between two pairs of Majorana bound states in a superconducting island

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Chinese Physics B 2024年第5期33卷 275-279页

作者：王浩迪任俊潼吕海峰柯莎莎 School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China

We investigate the nonlocal transport modulated by Coulomb interactions in devices comprising two interacting Majorana wires,where both nanowires are in proximity to a mesoscopic superconducting(SC)*** Majorana bound state(MBS)is coupled to one lead via a quantum dot with resonant *** this device,the nonlocal correlations can be induced in the absence of Majorana energy *** find that the negative differential conductance and giant current noise cross correlation could be induced,due to the interplay between nonlocality of MBSs and dynamical Coulomb blockade *** feature may provide a signature for the existence of the MBSs.

关键词： Majorana bound states superconducting island current cross correlation

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Synthesis of hyperbranched copolymers by combining enzymatic ring-opening polymerization and ATRP from a novel bifunctional initiator

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Chinese Science Bulletin 2006年第22期51卷 2706-2709页

作者： AI Peng CHEN Liang HU Dehua CHEN Yanhua LU Dongshuang ZHANG Bao sha ke WANG Jingyuan Alan G. MacDiarmid Institute of Jilin University Changchun 130012 China First Hospital of Jilin University Changchun 130021 China College of Chemistry Jilin University Changchun 130012 China

亢奋的分叉的脂肪族的聚酯 P (epsilon -CL) 借助于 BHB 的催化 Novozyme435 的戒指洞聚合(ROP ) 被综合(2， 2 二度(hydroxymethyl ) 奶油的酸) 。以 P ( epsilon-CL )的氢氧根结束的链被 esteriflcation ofa-bromopropionyl 溴化物... 详细信息

亢奋的分叉的脂肪族的聚酯 P (epsilon -CL) 借助于 BHB 的催化 Novozyme435 的戒指洞聚合(ROP ) 被综合(2， 2 二度(hydroxymethyl ) 奶油的酸) 。以 P ( epsilon-CL )的氢氧根结束的链被 esteriflcation ofa-bromopropionyl 溴化物修改获得亢奋的分叉的 difunctional 宏开始者，它在圣库克尔姆泰塔的 theATRP 被使用在 ATRP 的反应被用作催化剂系统 polystyrene-block-poly 获得 thehyperbranched 共聚物(2,2二度( hydroxymethyl )奶油的酸)。共聚物被 NMR 和 GPC 证实。

关键词： ATRP 酶开环聚合作用共聚物生物化学

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Pretreatment with low-frequency repetitive transcranial magnetic stimulation may influence neuronal Bcl-2 and Fas protein expression in the CA1 region of the hippocampus: A possible anti-epilepsy mechanism in a lithium-pilocarpine-induced epileptic rat mod

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Neural Regeneration Research 2010年第12期5卷 895-900页

作者： sha ke Hongning Zhao Xiaoming Wang Junqiang Zhang Fang Chen Yuanxu Wang Xiaoqiong Zhao Hui Huang Jianxiu Hu Department of Electroneurophysiology Affiliated Hospital of North Sichuan Medical CollegeNanchong 637000 Sichuan Province China Department of Electroneurophysiology Research Institute of Neurological Disease North Sichuan Medical College Nanchong 637000 Sichuan Province China

BAOKGROUND： Bcl-2 and Fas proteins are well known as anti-apoptotic and pro-apoptotic factors respectively. However, whether the anti-epileptic mechanism of low-frequency repetitive transcranial magnetic stimulation （rTMS） involves an anti-apoptotic effect via regulating Bcl-2 and Fas protein expression remains to be determined. OBJECTIVE： To verify the correlation between the anti-epileptic mechanism following pretreatment of low-frequency rTMS and anti-hippocampal apoptosis. DESIGN, TIME AND SETTING： A randomized controlled animal experiment was performed at Institute of Neurological Disorders, Affiliated Hospital of North Sichuan Medical College between September 2007 and March 2008. MATERIALS： Pilocarpine （053K13011） was provided by Sigma, USA; lithium was provided by shanghai Biotechnology Co., Ltd., China; Dantec Maglite-r25 rTMS instrument was provided by Dundee, Denmark. METHODS： A total of 21 adult male Wistar rats were randomly divided into control （n = 6）, rTMS pretreatment （n = 9）, and sham-stimulation （n = 6） groups. The rTMS pretreatment group was pretreated with low-frequency rTMS （0.5 Hz, 75% threshold intensity, 20 times/bundle, and 5 bundles/day）, while the sham-stimulation group was sham-stimulated with a similar sound for 7 successive days to establish lithium-pilocarpine-induced epileptic state models. MAIN OUTCOME MEASURES： Epileptic stroke latency; neuronal morphology was observed using hematoxylin and eosin staining; mean positive-reactive cell number and mean absorbance of Bcl-2 and Fas protein in the hippocampal CA1 region was observed using immunohistochemistry. RESULTS： Epileptic latency in the rTMS pretreatment group was significantly enhanced （P 〈 0.01）, and a number of degenerated neurons were observed to be apoptotic. Bcl-2 protein expression increased at each time point, but Fas protein expression decreased （P 〈 0.01）. CONCLUSION： Low-frequency rTMS has an anti-epileptic effect, which may be via regulation of Bcl-2 and Fas protein ex

关键词： transcranial magnetic stimulation epileptic state Bcl-2 protein Fas protein brain injury neural regeneration

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坚持以深化供给侧结构性改革推进产业结构调整升级

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经济纵横 2020年第10期 58-65页

作者：郭克莎华侨大学经济发展与改革研究院福建泉州362021

在新冠肺炎疫情影响下,深化供给侧结构性改革尤为重要。面对一些地方再度出现运用行政手段推进投资项目和产业发展的倾向,应科学应对疫情影响,正确把握推进供给侧结构性改革的基本取向,发挥好供给侧结构性改革对产业结构调整升级的作用... 详细信息

在新冠肺炎疫情影响下,深化供给侧结构性改革尤为重要。面对一些地方再度出现运用行政手段推进投资项目和产业发展的倾向,应科学应对疫情影响,正确把握推进供给侧结构性改革的基本取向,发挥好供给侧结构性改革对产业结构调整升级的作用。重点解决以下问题:一是处理好结构调整与深化改革的关系;二是处理好行政手段的合理运用问题;三是处理好短期政策与长期政策的关系。

关键词：供给侧结构性改革产业结构调整升级

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中国产业结构调整升级趋势与“十四五”时期政策思路

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中国工业经济 2019年第7期 24-41页

作者：郭克莎华侨大学经济发展与改革研究院

本文依据产业结构变动影响因素的变化特点,分析了中国产业结构调整升级的中长期趋势,并提出“十四五”时期促进产业结构调整升级的政策思路。从目前至2035年以至2050年,影响中国产业结构变动的重大因素主要是推动高质量发展的政策导向... 详细信息

本文依据产业结构变动影响因素的变化特点,分析了中国产业结构调整升级的中长期趋势,并提出“十四五”时期促进产业结构调整升级的政策思路。从目前至2035年以至2050年,影响中国产业结构变动的重大因素主要是推动高质量发展的政策导向、新技术革命和工业革命,以及新一轮深化改革开放。中国产业结构调整升级的阶段性趋势是:2016—2020年是承上启下的初步推进期,2020—2035年是多种因素作用下的快速变动期,2035年之后将进入有规律演变的相对稳定期。“十四五”时期要重点关注和解决的主要结构问题是:工业产能过剩问题、新兴产业发展问题、制造业的地位和作用问题、服务业结构的优化问题。“十四五”时期要总结吸收“十三五”时期的有益经验,推进产业结构政策的调整转变,完善政策实施的条件和机制。基本取向:一是坚持以供给侧结构性改革为引领,以深化改革促进产业政策的合理设计和有效实施;二是坚持处理好政府与市场的关系,使产业结构政策建立在使市场在资源配置中起决定性作用和更好发挥政府作用的体制机制上;三是坚持把结构调整与产业升级结合起来,推动制造业向中高端发展、高质量发展并增强对结构优化的带动效应。

关键词：产业结构调整升级 "十四五"规划供给侧改革产业政策

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