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Phytochrome B interacts with LIGULELESS1 to control plant architecture and density tolerance in maize

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Molecular Plant 2024年第8期17卷 1255-1271页

作者： Qingbiao Shi Ying Xia Qibin Wang Kaiwen Lv Hengjia Yang Lianzhe Cui Yue Sun Xiaofei Wang Qing Tao Xiehai Song Di xu Wenchang xu Xingyun Wang Xianglan Wang Fanying Kong Haisen Zhang Bosheng Li Pinghua Li Haiyang Wang Gang Li State Key Laboratory of Wheat Improvement College of Life SciencesShandong Agricultural UniversityTai'an 271018China State Key Laboratory of Wheat Improvement College of AgronomyShandong Agricultural UniversityTai'an 271018China Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agricultural Sciences at WeifangWeifangShandong 261000China guandong Laboratory for Lingnan Modern Agriculture State Key Laboratory for Conservation and Utilization of Subtropical Agro-BioresourcesSouth China Agricultural UniversityGuangzhou510642China

Over the past few decades,significant improvements in maize yield have been largely attributed to increased plant density of upright hybrid varieties rather than increased yield per ***,dense planting triggers shade avoidance responses(SARs)that optimize light absorption but impair plant vigor and performance,limiting yield improvement through increasing plant *** this study,we demonstrated that high-density-induced leaf angle narrowing and stem/stalk elongation are largely dependent on phytochrome B(phyB1/B2),the primaryphotoreceptor responsible for perceiving red(R)and far-red(FR)light in *** found that maize phyB physically interacts with the LIGULELESS1(LG1),a classical key regulator of leaf angle,to coordinately regulate plant architecture and density *** abundance of LG1 is significantly increased by phyB under high R:FR light(low density)but rapidly decreases under low R:FR light(high density),correlating with variations in leaf angle and plant height under various *** addition,we identified the homeobox transcription factor HB53 as a target co-repressed by both phyB and LG1 but rapidly induced by canopy *** and cellular analyses showed that HB53 regulates plant architecture by controlling the elongation and division of ligular adaxial and abaxial *** together,these findings uncover the phyB-LG1-HB53 regulatory module as a key molecular mechanism governing plant architecture and density tolerance,providing potential genetic targets for breeding maize hybrid varieties suitable for high-density planting.

关键词： maize phytochrome B LIGULELESS1 HB53 leaf angle density tolerance

试析美国教师教育国际化——以印第安纳大学海外实习项目为个案

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外国教育研究 2016年第10期43卷 64-77页

作者：吕光洙徐榛璐宋官东东北大学文法学院辽宁沈阳110169

培养具有国际视野和跨文化能力的教师候选人是教师教育国际化的重要趋势。印第安纳海外实习项目是美国教师教育国际化的经典代表,其在项目设置上体现了补充和替代传统的海外学习的发展定位、跨文化模式多元文化教师教育的目标、整合性... 详细信息

培养具有国际视野和跨文化能力的教师候选人是教师教育国际化的重要趋势。印第安纳海外实习项目是美国教师教育国际化的经典代表,其在项目设置上体现了补充和替代传统的海外学习的发展定位、跨文化模式多元文化教师教育的目标、整合性与关联性为导向的指导原则、服务学习任务为侧重点的特点。其项目管理体现了软硬并重的申请与监控、全程观照的实施以及自评和他评相结合的评价等特点。海外实习项目之所以成功,除其本身因素之外,国家、高校以及教育学院将国际化的战略整合进海外实习的发展逻辑发挥了至关重要的作用。美国教师教育国际化整体上仍处于缓慢发展阶段,大多数大学的海外实习项目在实施过程中面临着诸多问题与挑战。

关键词：教师教育国际化印第安纳大学海外实习项目教师候选人

Hydrate-based carbon dioxide capture from simulated integrated gasification combined cycle gas

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Journal of Natural Gas Chemistry 2012年第5期21卷 501-507页

作者： Chungang xu Xiaosen Li Jing Cai Zhaoyang Chen Key Laboratory of Renewable Energy and Gas Hydrate Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640GuandongChina Guangzhou Center for Gas Hydrate Research Chinese Academy of SciencesGuangzhou 510640GuangdongChina Graduate University of Chinese Academy of Sciences Beijing 100083China

The equilibrium hydrate formation conditions for CO2/H2 gas mixtures with different CO2 concentrations in 0.29 mol% TBAB aqueous solution are firstly *** results illustrate that the equilibrium hydrate formation pressure increases remarkably with the decrease of CO2 concentration in the gas *** on the phase equilibrium data,a three stages hydrate CO2 separation from integrated gasification combined cycle （IGCC） synthesis gas is *** the separation efficiency is quite low for the third hydrate separation,a hybrid CO2 separation process of two hydrate stages in conjunction with one chemical absorption process （absorption with MEA） is proposed and *** experimental results show H2 concentration in the final residual gas released from the three stages hydrate CO2 separation process was approximately 95.0 mol% while that released from the hybrid CO2 separation process was approximately 99.4 mol%.Thus,the hybrid process is possible to be a promising technology for the industrial application in the future.

关键词： integrated gasification combined cycle (IGCC) gas hydrate CO2 separation H2 purification chemical absorption

220kV变压器附加绕组专接滤波器的谐波治理方案

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电工技术学报 2015年第1期30卷 186-194页

作者：王灿罗隆福陈跃辉周冠东李晓芳许加柱李勇湖南大学电气与信息工程学院长沙410082 国网湖南省电力公司长沙410082

在某些220kV变电站中,由于其主要为非线性负荷供电,谐波污染严重。传统的解决方法为在变压器低压侧接LC滤波器,治理谐波的同时兼顾无功功率补偿。受低压绕组等值阻抗的约束,此种方法滤波效果不佳。本文提出了一种220kV变电站谐波治理新... 详细信息

在某些220kV变电站中,由于其主要为非线性负荷供电,谐波污染严重。传统的解决方法为在变压器低压侧接LC滤波器,治理谐波的同时兼顾无功功率补偿。受低压绕组等值阻抗的约束,此种方法滤波效果不佳。本文提出了一种220kV变电站谐波治理新方案,本方案采用变压器独立附加绕组接LC滤波器,且通过特殊设计使变压器附加绕组的等值阻抗为零。推导了传统方案和新方案的滤波原理,对比分析了新方案滤波效果的优越性。设计了一台具有零等值阻抗特征附加绕组的180MVA、220kV三相变压器,并基于Ansoft软件建立了场路耦合仿真模型进行仿真分析,最后对实验室样机进行测试分析,仿真和测试结果验证了新方案良好的滤波效果。

关键词： 220kV变电站谐波治理附加绕组等值阻抗

Effect of rifampicin pre-and post-treatment on rotenone-induced dopaminergic neuronal apoptosis and alpha-synuclein expression

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Neural Regeneration Research 2010年第2期5卷 85-91页

作者： Yuanlin Sun Guohua Zhang Jie xu Shiwen Chen Enxiang Tao Changqing xu M. Catherine Bennett Department of Neurology Second Affifiated Hospital of Sun Yat-sen University Guangzhou 510120 Guangdong Province China Blanchette Rockefeller Neurosciences Institute Rockville MD 20850 USA

BACKGROUND： Rifampicin inhibits the formation of a-synuclein multimer and protects against 1-methyl-4-phenyl-1,2, 3, 6-tetrahydropyritine （MPTP）-induced PC12 cell apoptosis. OBJECTIVE： To compare the effect of rifampicin pre- and post-treatment on tyrosine hydroxylase and α-synuclein expression in substantia nigra pars compacta in a rat model of Parkinson＇s disease. DESIGN, TIME AND SE＇B＇ING： A randomized, controlled experiment was performed at the Experimental Animal Center of Sun Yat-sen University North Campus （China） from November 2006 to October 2008. MATERIALS： Rifampicin was purchased from MD, USA; rotenone was purchased from Sigma, USA; mouse anti-rat α-synuclein monoclonal antibody was purchased from B＆D, USA; and rabbit anti-rat tyrosine hydroxylase monoclonal antibody was purchased from Chemicon, USA. METHODS： A total of 72 male, Sprague Dawley rats, aged 8 weeks, were randomly assigned to 5 groups： blank control （n = 12）, rifampicin （n = 12）, rotenone （n = 16）, rifampicin pre-treatment （n = 16）, and rifampicin post-treatment （n = 16）. Parkinson＇s disease model rats were established via a subcutaneous injection of rotenone （1.5 mg/kg per day） in the three treatment groups, once a day for 3 successive weeks. Rifampicin （30 mg/kg per day） was intragastrically administered in the rifampicin pre-treatment group 3 days prior to rotenone induction and in the rifampicin post-treatment group 7 days after rotenone induction. Rats were treated with a subcutaneous injection of 1 mL/kg per day sunflower oil in the blank control group and an intragastric injection of 30 mg/kg per day rifampicin in the rifampicin group, once a day for 3 successive weeks in total. MAIN OUTCOME MEASURES： Prior to treatment and in the end of the 3^rd week after treatment, the rats were evaluated using the modified neurological severity score. The substantia nigra from the rats was extracted for hematoxylin-eosin staining. Western blot analysis was performed to determine tyrosine hydroxyla

关键词： rifampicin rotenone Parkinson's disease α-synuclein dopaminergic neurons

Photoelectrochemical Performance of Nb-doped TiO_2 Nanoparticles Fabricated by Hydrothermal Treatment of Titanate Nanotubes in Niobium Oxalate Aqueous Solution

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Journal of Materials Science & Technology 2014年第8期30卷 765-769页

作者： Lizhen Long Liangpeng Wu xu Yang Xinjun Li Key Laboratory of Renewable Energy Guangzhou Institute of Energy ConversionChinese Academy of Sciences University of Chinese Academy of Sciences

Nb-doped TiO2 nanoparticles were prepared by hydrothermal treatment of titanate nanotubes in niobium oxalate aqueous *** effect of Nb doping and rutile content on the photoelectrochemical performance based on TiO2 powder electrodes was *** results show that Nb-doped TiO2 with a small amount of rutile exhibits the enhanced photoelectric conversion efficiency for dye-sensitized solar *** highest photoelectric conversion efficiency of 8.53%is obtained for 1%Nb—TiO2 containing a small amount of *** a small amount of rutile contained in 2%Nb—TiO2,a higher photoelectric conversion efficiency of8.77%is achieved.

关键词： Titanate nanotube Hydrothermal Nb-doped TiO2 Dye-sensitized solar cell

云杉预水解硫酸盐法制备Lyocell纤维用溶解浆

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毛纺科技 2024年第9期52卷 34-43页

作者：张兴李军荣钱丽颖何北海徐纪刚华南理工大学轻工科学与工程学院广东广州510640 中国纺织科学研究院有限公司生物源纤维制造技术国家重点实验室北京100025

针对目前国产Lyocell纤维用溶解浆质量不高、来源不稳定等问题,以俄罗斯云杉为原料,采用预水解硫酸盐蒸煮工艺制备了高品质Lyocell纤维用溶解浆粕。考察了预水解、硫酸盐蒸煮、二氧化氯、过氧化氢漂白及酸处理等工艺对溶解浆粕关键技术... 详细信息

针对目前国产Lyocell纤维用溶解浆质量不高、来源不稳定等问题,以俄罗斯云杉为原料,采用预水解硫酸盐蒸煮工艺制备了高品质Lyocell纤维用溶解浆粕。考察了预水解、硫酸盐蒸煮、二氧化氯、过氧化氢漂白及酸处理等工艺对溶解浆粕关键技术指标(如α-纤维素含量、聚合度、白度、灰分以及金属离子含量)的影响。试验结果显示,保温时间90 min、温度150℃、固液比1∶4为最佳预水解条件,碱用量24%、硫化度30%、保温时间180 min为最佳蒸煮条件。在最佳预水解和蒸煮条件下制备的浆料经过二氧化氯质量分数1.5%漂白、冷碱质量分数12%抽提、过氧化氢质量分数5%漂白和乙酸质量分数6%处理后,所得浆粕的α-纤维素含量为96%,白度为85%,聚合度为647,灰分为0.06%,铁离子含量为6 mg/kg,铜离子含量为3 mg/kg。偏光显微镜观察显示,该浆料在90℃的N-甲基吗啉-N-氧化物(含水率为13.3%)中30 s即可完全溶解。

关键词： Lyocell溶解浆预水解硫酸盐法制浆二氧化氯漂白俄罗斯云杉冷碱抽提

应用原生质体融合技术定向改造林可霉素产生菌的探索

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生物工程学报 1992年第3期8卷 237-242页

作者：徐京宁米贯东唐孝宣华东化工学院

金色链霉菌Streptomyces aureofaciens(LM^r,CTC^r,产金霉素)的原生质体经U.V.照射40min灭活后,与林可链霉菌林可变种Streptomyces lincolnensis var lincolnensis(LM^r,CTC^s,产林可霉素),在42%PEG(MW6000)诱导下进行种间原生质体融合,在含金霉素50μg/ml的再生平板上直接选择融合子,融合率达9.05×10^(-5)。从大量融合体中筛选到4株产生抗菌物质不同于亲株并较稳定的菌株。对其中一株所产的抗生素作了初步鉴别,推测其结构与林可霉素相近。另一株的薄层层析R_f^(?)值与氯林可霉素相近,尽管此等产物还有待于进一步鉴别,但这一育种途径值得探讨。

关键词：原生质体融合链霉菌林可霉素

Interface modulated electron mobility enhancement in core–shell nanowires

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Chinese Physics B 2022年第11期31卷 256-261页

作者： Yan He Hua-Kai xu Gang Ouyang College of Science Guangdong University of Petrochemical TechnologyMaoming 525000China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan ProvinceSchool of Physics and ElectronicsHunan Normal UniversityChangsha 410081China

The transport properties of core–shell nanowires(CSNWs)under interface modulation and confinement are investigated based on the atomic-bond-relaxation(ABR)correlation mechanism and Fermi’s golden *** analytical expression for the relationship between carrier mobility and interface mismatch strain is derived and the influence of size,shell thickness and alloyed layer on effective mass,band structures,and deformation potential constant are *** is found that interface modulation can not only reduce the lattice mismatch to optimize the band alignment,but also participate in the carrier transport for enhancing ***,the underlying mechanism regarding the interface shape dependence of transport properties in CSNWs is *** great enhancement of electron mobility suggests that the interface modulation may become a potential pathway to improving the performance of nanoelectronic devices.

关键词： core-shell nanowires interface modulated electron mobility