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Search Results: 1 - 10 of 55304 matches for " 秦余香;夏光敏 "
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小麦的小孢子培养
余香;光敏
植物学报 , 2004,
Abstract: ?小孢子培养是在花药培养的基础上发展起来的一种高效再生体系,其在植物育种中的作用一直受到关注。但是,由于培养技术的限制,小麦(Triticumaestivum)小孢子培养还未能推广应用。近年来小麦小孢子培养发展很快,展现出广阔的应用前景。
In Vitro Culture of Wheat Microspores
小麦的小孢子培养

QIN Yu-Xiang XIA Guang-Min,
余香
,光敏

植物学报 , 2004,
Abstract: Microspore culture is a plant regeneration system with a high frequency, which was developed from anther culture. It is noticed that microspore culture has an important role in plant breeding. But, microspore culture has not been utilized widely because the technical limitation in wheat. In recent years, microspore culture of wheat (Triticum aestivum L.) has been improved significantly with a potential for application.
小麦耐盐相关基因TaHAK1的克隆与表达分析
余香,田延臣,王军,韩璐
麦类作物学报 , 2011, DOI: 10.7606/j.issn.1009-1041.2011.06.003
Abstract: 为了解小麦品种山融3号耐盐性的基因状况,以大麦HvHAK1为探针,通过电子克隆和PCR方法,从该品种根的cDNA文库中克隆到一个小麦的耐盐相关基因TaHAK1(HighAffinityK+transporter1)。该基因ORF全长2405bp,编码776个氨基酸,含有8个内含子。与已报道的大麦、水稻、玉米等单子叶植物的HAK基因具有较高的相似性。RTPCR分析表明,TaHAK1在小麦根中表达量较高,且受钾饥饿和盐胁迫诱导表达。在200mmol·L-1NaCl胁迫条件下,TaHAK1在耐盐小麦品种山融3号中的最高表达量高于在盐敏小麦品种济南177中的最高表达量。这些结果说明,在小麦中克隆到了大麦HvHAK1的同源基因,该基因参与了小麦对高盐、低钾等非生物胁迫的响应,可能对山融3号的耐盐性具有一定贡献。
漠阳江流域水环境容量的时空分布特征研究
Temporal and Spatial Distribution Characteristic Research of Water Environmental Capacity in Moyang River Basin

程翔,赵志杰,华鹏,宋宝木,余香,何康茂
- , 2016, DOI: 10.13209/j.0479-8023.2016.029
Abstract: 摘要 针对实测径流资料较缺乏的漠阳江流域, 通过流域水文模型HSPF(hydrological simulation program-Fortran)模拟各支流和子流域详细的径流时空特征, 利用一维稳态水质数学模型计算不同时间和空间上化学需氧量(COD)和氨氮的水环境容量。结果表明: 1) 在漠阳江流域, HSPF模型对年与月径流模拟的相对误差小于15%, Nash-Sutcliffe系数大于0.9; 水质模型的相对误差在 10%左右, Nash-Sutcliffe 系数大于0.8; 2) 在90%, 50%和10%保证率下, 漠阳江流域COD的环境容量分别为16.45, 21.84和24.97 万t, 氨氮的环境容量分别为0.51, 0.88 万t 和1.14 万t; 受径流季节波动影响, 枯水期与丰水期季节水环境容量差异明显; 1月份的水环境容量及其变差最小, 6月份的水环境容量及其变差最大; 3) 空间分布上, 漠阳江干流流域承载力较大, 一级与二级支流的承载力较小。因此, 在水文资料缺乏的流域, 可基于HSPF模型模拟的水文条件, 开展水环境容量的时空分布分析, 为水环境容量总量控制方案的制定提供指导。
Abstract This study takes Moyang River basin, which is lack of hydrologic data, as the research object to simulate the temporal and spatial distribution of water flow through HSPF (hydrological simulation program-Fortran) model, and calculates the temporal and spatial distribution of chemical oxygen demand (COD) and ammonia nitrogen water environmental capacity using one-dimensional steady-state water quality mathematical model. Results show that 1) HSPF model’s yearly and monthly hydrological errors are below 15%, Nash-Sutcliffe coefficient is over 0.9; the relative error of the water quality model is around 10%, Nash-Sutcliffe coefficient over 0.8. 2) Under 90%, 50% and 10% assurance rate, COD capacity of Moyang River basin is 164500 t, 218400 t and 249700 t respectively, and ammonia nitrogen is 5100 t, 8800 t and 11400 t respectively. Affected by seasonal runoff fluctuations, difference of water environment capacity between dry season and wet season is obvious. The variation of water environment capacity in January is minimum and June the maximum. 3) Bearing capacity of main stream of Moyang River is larger than that of the primary and secondary tributaries. Therefore, in some basins where hydrological data is lack, HSPF model can be applied to simulate the hydrology, analysis time and space distribution of water environmental capacity, and provide guidance for the establishment of total amount control scheme of water environmental capacity.
外来入侵植物飞机草的研究进展与展望
余香, 冯玉龙, 李巧明
植物生态学报 植物生态学报 , 2010, DOI: 10.3773/j.issn.1005-264x.2010.05.013
Abstract: ?飞机草(Chromolaenaodorata)是世界公认的多年生入侵性杂草,原产于中、南美洲,现已扩散至非洲、亚洲、大洋洲和西太平洋群岛的大部分热带及亚热带地区,严重威胁着入侵地本地植物的生长、生物多样性和生态安全。由于其蔓延速度快,及其对农、林、牧业等的巨大危害,引起了社会各界的广泛关注。揭示飞机草的入侵机制,对于遏制其扩散速度,最终消除或降低其危害,恢复生态系统平衡,具有十分重要的现实意义和科学价值。该文介绍了飞机草的生物学特性、地理分布、入侵后果及防治措施等。鉴于目前对飞机草的入侵路线和入侵机制还没有全面系统的认识,该文重点介绍了其在世界范围内的传播路线及其成功入侵机制,旨在为飞机草的防治工作提供科学依据。最后提出有关飞机草生理生态学和分子生物学方面的一些展望,并强调对其适应性进化遗传基础的研究可能为探讨其成功的入侵机制带来新突破。
词空格在汉语文本阅读中的作用:基于眼动研究的元分析
余香,任志洪,叶一舵
心理科学进展 , 2015,
Abstract: ?运用元分析方法考察词空格在汉语文本阅读中的作用,通过文献检索,搜集了21篇有效文献,186对数据满足了元分析标准(n=756)。结果表明:(1)词空格整体效果量:较之无空格,有空格汉语文本阅读的平均注视时间、总注视次数、首次注视时间、凝视时间、局部注视时间和局部注视次数的效果量分别为0.65、–0.12、0.26、0.58、0.67和0.64。(2)亚组分析发现:外国学生组平均注视时间、首次注视时间、凝视时间、局部注视时间和局部注视次数的词空格效果量显著高于中国学生组;空格方式组平均注视时间的效果量显著高于阴影方式组;低汉语水平组凝视时间、局部注视时间和局部注视次数的效果量显著高于高汉语水平组;真词组凝视时间、局部注视时间和局部注视次数的效果量显著高于假词组;小学生组局部注视时间的效果量显著高于大学生组。
典型屋顶太阳能光伏板风压实测研究
余香,董锐,王守强
- , 2016, DOI: 10.11908/j.issn.0253-374x.2016.04.007
Abstract: 对一栋多功能低层建筑平屋顶上的太阳能光伏板进行风压实测,根据风压时程特性选择适当的概率密度函数对各测点的风压系数进行非线性回归分析.运用6种概率密度函数对各测点的均值和极值(正极大值和负极小值)风压系数时程以及面积平均后的极值风压系数时程进行数值拟合,比较不同概率分布的拟合效果.回归分析结果表明:均值风压系数的概率分布近似无偏分布,t分布的拟合效果最好,其次是Logistic分布、正态分布、极值I型分布;负压极小值和正压极大值风压系数的概率分布分别为左偏分布和右偏分布,极值I型分布的拟合效果最好,其次是Lognormal分布和Gamma分布,而正态分布的拟合效果最差;最不利风压系数由极值负风压控制,即光伏板的风力由吸力主导;经面积平均后的最不利风压系数建议取值-2.3.
A full scale measurement of wind pressure loadings was conducted on photovoltaic (PV) solar panels mounted on the flat roof of a multipurpose low rise building. According to the characteristics of wind pressure time series, several probability density functions were properly selected for nonlinear regression analysis of wind pressure coefficients of each gauging point. Numerical fittings of mean and peak (positive maxima and negative minima) and area averaged peak pressure coefficients were performed and compared by using six probability distributions. The analysis results show that the probability distributions of negative minima and positive maxima of pressure coefficients are left skewed and right skewed, respectively. The mean pressure coefficient time series comply with unbiased distribution and the t distribution fits the measured data best, followed by Logistic, Normal, Type I EDV distribution, respectively; Type I EVD has the best fitting effect for peak values, and then the Lognormal distribution, Gamma distribution and Normal distribution in order; The most unfavorable pressure coefficient is dominated by negative peak pressure, that is, suction forces are predominant over wind forces on PV panels; The tributary area averaged unfavorable pressure coefficient is recommended to take -2.3
小麦远缘杂交胚拯救技术
周传恩,光敏
麦类作物学报 , 2005, DOI: 10.7606/j.issn.1009-1041.2005.03.111
Abstract: 小麦是世界上最重要的粮食作物之一,通过与其他物种的远缘杂交来改良小麦农艺性状的工作已经开展了多年。小麦远缘杂交通常不能得到可育的杂种植株,且普遍存在杂种胚在发育过程中败育的现象。能否从培养的杂种胚中成功得到植株主要依赖于胚的成熟程度和培养基的组成等条件。通过体外培养的方式,幼胚拯救技术已得到成功的应用,产生了多种多样的杂种后代。本文综述了幼胚的生理特征、体外发育特征及胚培养的影响因子,总结了幼胚拯救的一般方法以及在小麦远缘杂交中的应用,并指出了该技术应用的一些限制因素。
农杆菌介导单子叶植物基因转化研究进展
贺晨霞,光敏
植物学报 , 1999,
Abstract: ?农杆菌介导基因转化系统是双子叶植物基因转化的普通而有效的手段,其优点倍受重视,近年来又广泛用于曾被认为不在农杆菌宿主范围之内的单子叶植物的基因转化研究,并在很多重要粮食作物上获得成功,例如水稻、玉米、大麦、小麦等。本文就农杆菌转化的优点,转化机理以及对单子叶植物转化的研究进展作一概述。
混合小麦亲本与新麦草不对称体细胞杂交体系的建立
李翠玲 光敏*
生物工程学报 , 2004,
Abstract: 以小麦品种济南177悬浮细胞系来源的原生质体与同品系胚性愈伤组织制备的原生质体混合后作为受体;以经过380μw/cm2紫外线照射1min、2min的新麦草原生质体分别作为供体,用peg法诱导融合。组合ⅰ(176+cha9+新麦草uv1min)获得16个再生克隆。经过形态学、同工酶、染色体和rapd分析,确定其全部为属间体细胞杂种。其中的5个克隆再生杂种植株。用7对小麦ssr引物对杂种克隆的叶绿体基因组进行了分析;组合ⅱ(176+cha9+新麦草uv2min)只获得3个克隆,且逐渐褐化死亡。表明以小麦济南177的两种培养细胞混合作受体的融合体系有利于杂种的获得及再生;紫外线对融合产物的生长发育有明显的剂量效应。
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