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Journal of Integrative Agriculture 2013年第2期12卷 251-262页

作者： HOU Zhi-hui LIU Guo-hua HOU Li-xia wang lan-xiang LIU Xin College of Life Sciences Qingdao Agricultural University/University Key Laboratory of Plant Biotechnology in Shandong Province Universities of Shandong

Hydrogen peroxide （H2O2） is an important signaling molecule in ethylene-induced stomatal closure in Arabidopsis thaliana. Early studies on the sources of H2O2 mainly focused on NADPH oxidases and cell-wall peroxidases. Here, we report the involvement of polyamine oxidases （PAOs） in ethylene-induced H2O2 production in guard cells. In Arabidopsis epidermal peels, application of PAO inhibitors caused the failure of ethylene to induce H2O2 production and stomatal closure. Results of quantitative RT-PCR analysis and pharmacological experiments showed that AtPAO2 and AtPAO4 transcripts and activities of PAOs were both induced by ethylene. In transgenic Arabidopsis plants over-expressing AtPAO2 and AtPAO4, stomatal movement was more sensitive to ethylene treatment and H2O2 production was also significantly induced. The increased H2O2 production in the transgenic lines compared to the wild-type plants suggests that AtPAO2 and AtPAO4 probably are involved in ethylene-induced H2O2 production. Several factors which induce stomatal closure such as dehydration and high salinity all enhanced the expression of AtPAO2 and AtPAO4 to different degrees. Moreover, GFP- AtPAOs fusion protein localized in the nucleus, cytoplasm, and cell wall of the guard cells. Therefore, our results strongly indicated that PAO is a source of H2O2 generation in Arabidopsis guard cells and plays crucial roles in stomatal movement.

关键词： Arabidopsis thaliana ethylene guard cell hydrogen peroxide polyamine oxidase

Effect of topical application of terbinafine on fungal keratitis

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Chinese Medical Journal 2009年第16期122卷 1884-1888页

作者： LIANG Qing-feng JIN Xiu-ying wang xiang-lan SUN Xu-guang Beijing Institute of Ophthalmology Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing 100005 China

Background Fungal keratitis is a rare but serious corneal disease that may result in loss of vision. The poor prognosis might be due to limited treatment option. This study aimed to evaluate the clinical efficacy of 0.25% terbinafine eye drops comparing with 5% natamycin suspension on fungal keratitis. Methods A retrospective clinical trial was performed on 90 patients presenting with direct smear and/or culture positive fungal keratitis at Beijing Tongren Hospital, Beijing, China from January 2006 to May 2008. Corneal ulcers were categorized as mild or severe. Forty-five patients were treated with topical terbinafine and the next 45 cases received topical natamycin hourly. Results Filamentous fungi were found in corneal scrapings among all 90 cases. Fungal cultures were positive in 64 patients （71%）. Species of Fusarium and Aspergillus were the principal isolates. Forty （89%） patients showed favorable response to terbinafine, while forty-two （93%） patients exhibited favorable response to natamycin （P 〉0.05）. The mean course of treatment was significantly showed in the terbinafine treatment group than natamycin group （（26.5±11.2） days versus （19.3±6.4） days; P 〈0.05）. In terbinafine group, twenty patients with ulcers smaller than 4 mm had favorable outcome, while 20 of 25 patients with ulcers more than 4 mm in diameter had favorable response （P 〈0.05）. Twenty-seven patients with depth of infiltration less than half of stroma thickness had favorable response to terbinafine, while 13 of 18 patients with depth of infiltration more than half of stroma responded to terbinafine. This difference was statistically significant （P 〈0.05）. Conclusions Our findings suggest that topical terbinafine is an effective antifungal drug for the management of filamentous mycotic keratitis, particularly in cases with smaller and shallower ulcers. Its mean duration of treatment was longer than natamycin.

关键词： terbinafine natamycin keratitis fungal therapy

Laser image refractive index sensor based on the combination of a coreless optical fiber and a digital camera

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Optoelectronics Letters 2025年第2期21卷 65-68页

作者： GUO Jingzhong lan Feng CHEN xiang LIU Haifeng Xi'an Institute of Space Radio Technology Key Laboratory of Optoelectronic Sensor and Sensing Network Technology College of Electronic Information and Optical Engineering Nankai University

As a laser passes through a scattering medium,the light interacts with the irregular reflections within the medium,resulting in light scattering and the formation of *** this paper,an image sensor based on the combination of a coreless optical fiber and a digital camera is proposed for liquid refractive index sensing *** coreless fiber is used as a sensing unit,and the change in the speckle pattern is measured using the digital correlation method to detect the magnitude of the liquid's refractive *** experimental results indicate that the laser image sensing technique is capable of effectively distinguishing liquid samples with refractive indices ranging from 1.332 8 to1.390 8,with a sensing sensitivity of-1.306 ***,the laser image sensing technique,with its advantages of high experimental reproducibility,simple system design,remote over-control,holds great research significance and potential application in laser communication and sensor integration.

关键词： Digital cameras

科技保险支持企业自主创新问题与对策研究——以河北省为例

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技术经济与管理研究 2011年第8期 58-61页

作者：王香兰河北金融学院河北保定071051

加快推进企业自主创新,建设自主创新型国家是我国面向未来的重大战略选择。这一目标的实现不能仅靠科技企业的努力,还需要集合社会各界的力量以及各种科技创新扶持手段的共同作用。本文将科技保险与其它科技创新支持手段从经营主体、资... 详细信息

加快推进企业自主创新,建设自主创新型国家是我国面向未来的重大战略选择。这一目标的实现不能仅靠科技企业的努力,还需要集合社会各界的力量以及各种科技创新扶持手段的共同作用。本文将科技保险与其它科技创新支持手段从经营主体、资金来源及对股权的影响、支持渠道和支持时段等几个方面进行了比较分析,以明确科技保险在科技创新支持体系中的独特作用,即科技保险能有效化解、转移企业自主创新活动中面临的科技风险,对促进我国科技进步和经济发展有着重要意义。而通过对我国科技保险试点中出现的主要问题以及产生根源进行深入剖析,最终提出解决科技保险存在的问题,支持企业自主创新的对策建议,以期对我国科技保险理论与实践有所裨益。

关键词：自主创新科技风险科技保险风险管理

改性PVDF中空纤维液膜富集Er^(3+)的研究

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稀土 2021年第3期42卷 79-84页

作者：张传成王香兰武汉生物工程学院化学与环境工程学院湖北武汉430415

为改善聚偏氟乙烯(PVDF)液膜稳定性并获得较高Er^(3+)萃取率,采用0.5%LiCl共混改性膜自制膜萃取器,研究了LiCl改性PVDF中空纤维膜对稀土离子Er^(3+)的富集。结果表明,Er^(3+)的萃取率随着载体HEHEHP浓度、反萃剂盐酸浓度和两相流速的增... 详细信息

为改善聚偏氟乙烯(PVDF)液膜稳定性并获得较高Er^(3+)萃取率,采用0.5%LiCl共混改性膜自制膜萃取器,研究了LiCl改性PVDF中空纤维膜对稀土离子Er^(3+)的富集。结果表明,Er^(3+)的萃取率随着载体HEHEHP浓度、反萃剂盐酸浓度和两相流速的增加先增大后减小,随着料液相初始H+浓度增加而降低。研究获得Er^(3+)的最佳萃取工艺为:料液相初始H+浓度为0.065 mol/L,反萃剂盐酸浓度为3.0 mol/L,载体HEHEHP浓度为0.25 mol/L,两相流速为10 mL/min。在此条件下,进一步考查了不同LiCl含量改性中空纤维膜富集Er^(3+)的效率。

关键词：改性中空纤维膜分离 2-乙基己基磷酸-单-2-乙基己基酯铒

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GSM-R网络小区覆盖半径的算法研究

铁道学报 2005年第1期27卷 66-69页

作者：南海兰王湘钟章队北京交通大学现代通信研究所北京100044

随着GSM R网络在中国铁路应用的需要,网络预规划得到广泛的重视。针对中国铁路和环境的实际情况结合GSM R网络技术,研究了预规划GSM R网络小区覆盖半径的算法。本文主要从理论分析、已知条件和算法三方面来系统的介绍预规划小区覆盖半... 详细信息

随着GSM R网络在中国铁路应用的需要,网络预规划得到广泛的重视。针对中国铁路和环境的实际情况结合GSM R网络技术,研究了预规划GSM R网络小区覆盖半径的算法。本文主要从理论分析、已知条件和算法三方面来系统的介绍预规划小区覆盖半径的算法。该算法充分考虑各种影响小区覆盖半径规划的因素,并在链路预算中进行详细的分析。

关键词： GSM-R 覆盖半径链路预算对数正态阴影

Mainchain conformation ordering self-assembly tailored room temperature phosphorescence emission

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Science China Chemistry 2025年第1期68卷 329-336页

作者： Yuzhu Li Yumeng Gao Feng Tian Yu wang Yuan Yao Shaoliang Lin xiang Ma Binbin Xu Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre Frontiers Science for Materiobiology and Dynamic Chemistry School of Chemistry and Molecular Engineering East China University of Science & Technology

Developing organic room-temperature phosphorescence （RTP） materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copolymers poly(1,2-bis（4-alkoxyphenyl）ethane-1,2-dione-alt-（ethylene glycol）x)(P（Bz-alt-EGx）) that combined the advantage of alternating benzil and EGxskeleton,and tunable mainchain *** a mainchain conformation ordering assembly （COA） process,P（Bz-alt-EGx） self-assembled into well-defined platelets,and such assemblies emitted blue RTP at ca.425 nm due to the ordered folded-chain conformation and confined *** contrast,traditional self-assembly （TA） of P（Bz-alt-EGx） obtained less ordered aggregates,such as asymmetric worms,vesicles,and rod-like *** resultant less ordered aggregates exhibited yellow-green RTP at ca.550 *** wide-tuning RTP emission in solution （between blue and yellow-green,over125 nm） is realized using the P（Bz-alt-EGx） alternating copolymers under the treatment of different self-assembly *** study uncovers a new strategy to tailor the RTP emission through different self-assembly pathways and holds great promise for the fabrication of advanced optical materials.

关键词： self-assembly conformation ordering alternating copolymer phosphorescence emission

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一种电力电子变压器的控制策略研究

电机与控制学报 2018年第7期22卷 78-84页

作者：武琳王兰香李赫王红仁南瑞集团(国网电力科学研究院)有限公司江苏南京211000 北京科东电力控制系统有限责任公司北京100092 国网辽宁电力公司大连培训中心辽宁大连116023

对一种基于双向DC-DC变换器的电力电子变压器进行了深入分析,针对现有电力电子变压器整流侧所采用基于D-Q变换均压控制算法复杂的问题,提出一种基于电压排序的直流电容电压平衡控制算法,无需单相D-Q变换,简化了控制结构,提高了均压控制... 详细信息

对一种基于双向DC-DC变换器的电力电子变压器进行了深入分析,针对现有电力电子变压器整流侧所采用基于D-Q变换均压控制算法复杂的问题,提出一种基于电压排序的直流电容电压平衡控制算法,无需单相D-Q变换,简化了控制结构,提高了均压控制效果。针对现有电力电子变压器多DC-DC单元并联的功率均衡控制所需要信号采样多的问题,提出一种不需要电流采样DC-DC单元并联均功率控制策略,减小了采集信号数量。仿真和实验结果验证了文中所提出控制策略有效性。

关键词：电力电子变压器双向全桥DC-DC变换器均压控制均功率控制全球能源互联网

1，3，4-噁二唑并1，2，4-三唑类双杂环的合成

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湖南大学学报（自然科学版） 2009年第3期36卷 63-66页

作者：向建南周后相蒋历辉李焕银汪兰香黄勇龙伯华湖南大学化学化工学院湖南长沙410082 中南大学化学化工学院湖南长沙410083

采用生物活性基团拼接的分子设计方法,将两类活性杂环N-多氟烷基-4-苯基-5-对碘苯基-1,2,4-三唑-3-硫酮和N-多氟烷基-5-对碘苯基-1,3,4-噁二唑-2-硫酮以Sonogashira偶联的方式进行拼接,设计并合成了几个新型双杂环化合物,其结构经过1H N... 详细信息

采用生物活性基团拼接的分子设计方法,将两类活性杂环N-多氟烷基-4-苯基-5-对碘苯基-1,2,4-三唑-3-硫酮和N-多氟烷基-5-对碘苯基-1,3,4-噁二唑-2-硫酮以Sonogashira偶联的方式进行拼接,设计并合成了几个新型双杂环化合物,其结构经过1H NMR,19F NMR,IR和MS谱以及元素分析确证.

关键词：合成 1,3,4-噁二唑-2-硫酮 1,2,4-三唑-3—硫酮 Sonogashira偶联双杂环

Effect of exogenous peroxidase on the endogenous peroxidase in the Chinese red radish (Raphanus sativus L.) seedling

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Effect of exogenous peroxidase on the endogenous peroxidase ...