叠鞘石斛组织培养及植株再生体系优化

以叠鞘石斛成熟种子为材料，使用IBA、6-BA和NAA共3种生长调节剂与香蕉泥和椰子汁有机物等组合，采用3因素3水平正交设计及单因素设计进行组织培养研究.结果显示，最佳叠鞘石斛原球茎培养基为MS+50 g/L椰子汁+30 g/L蔗糖+6 g/L琼脂，40 d增殖系数为6.75,分化率为84.38%;最佳叠鞘石斛壮苗生根培养基为1/2 MS+0.5 mg/L IBA+1.0 mg/L 6-BA+0.1 mg/L NAA+30 g/L蔗糖+6 g/L琼脂.通过该技术，可以在较短时间获得大批量优质叠鞘石斛种苗，为大规模叠鞘石斛药材生产提供基础.     

白三叶高频组织培养再生体系的研究

以白三叶的子叶节为外植体,对影响白三叶愈伤组织的诱导、丛生芽的分化及生根的激素种类和浓度进行了优化.结果表明:诱导愈伤组织的最佳培养基为:MS+2,4-D 2 mg/L+6-BA 0.4 mg/L+3%蔗糖+0.7%琼脂,诱导率为62.67%;诱导从生芽分化的最佳培养基为:MS+6-BA 0.5 mg/L+NAA 0.1 mg/L+3%蔗糖+0.7%琼脂,分化率为92.33%;诱导生根的最佳生根培养基为:MS+NAA 0.2 mg/L+1.5%蔗糖+0.8%琼脂,生根率达100%;建立了一个高频的白三叶再生体系,为白三叶基因工程奠定基础.     

蝴蝶兰类原球茎诱导、增殖及植株再生条件初步研究

为优化蝴蝶兰类原球茎诱导和增殖再生条件,以蝴蝶兰品种‘红太阳’无菌播种形成的原球茎为材料,研究了取材时间、植物生长调节剂(6-BA、NAA)、碳源等对类原球茎诱导和增殖及分化再生的影响,结果表明,生长45d的蝴蝶兰原球茎最适于类原球茎诱导和增殖培养。最佳的类原球茎诱导和增殖培养基为:花宝1号3.5g/L+6-BA 5.0mg/L+NAA 0.7mg/L+白糖20g/L+琼脂6.0g/L+活性炭2.0g/L,pH为5.4-5.8,最高增殖系数可以达到17.33,比已报道的最高增殖系数提高了35.39%;类原球茎最佳分化培养基为:花宝1号3.5g/L+6-BA 3.0mg/L+NAA 0.5mg/L+白糖20g/L+琼脂6.0g/L+活性炭2.0g/L,pH为5.4-5.8,最高分化率可达96.67%,生根率最高可达到92%。     

铁皮石斛的组织培养及快速繁殖

铁皮石斛的外植体在MS 6BA0.5 mg/L-2 mg/L NAA0.25 mg/L~0.4 mg/L或2,4-D0.25 mg/L培养基中能诱导分化丛生芽3~5倍。原球茎分化丛生芽10~15倍。壮苗后在1/2MS NAA0.2 mg/L~0.5mg/L诱导生根,生根率达90%以上。     

金钗石斛兰组培苗的生根培养和移栽

以1/2MS为基本培养基,添加不同浓度的NAA、IBA和6-BA,配置16种培养基进行试验,筛选最适宜于金钗石斛兰生根的培养基.结果显示:1/2MS+0.2 mg/L 6-BA+1.0 mg/L NAA+0.5 mg/L IBA及1/2MS+0.5 mg/L 6-BA+1.0 mg/L NAA+0.2 mg/L IBA培养基最适宜于金钗石斛兰生根,生根率达100%,而且根系生长健壮.将金钗石斛兰生根组培苗移栽于6种不同的基质中,结果表明,以棕榈外壳作为移栽基质最佳,移栽成活率达100%,且幼苗生长良好.     

植物生长调节剂对五鹤续断组织培养的影响

通过不同植物生长调节剂的组合和配比,对五鹤续断茎尖、幼嫩茎段和叶进行愈伤组织的诱导、丛生芽分化和增值及生根培养,确定了五鹤续断组织培养的最佳培养基为:(1)初代培养基为MS+6-BA1.5 mg/L+NAA0.1mg/L;(2)丛生芽培养基为MS+6-BA 2.0mg/L+NAA 0.6 mg/L;(3)生根培养基为1/2MS+IBA 0.4 mg/L+PP3330.4mg/L.     

白芨高效再生体系建立及工厂化育苗技术研究

以白芨种子为外植体,1/2MS或MS为基本培养基,通过添加不同浓度配比的植物生长调节剂,筛选最适合原球茎的诱导、芽的增殖与分化以及生根培养的条件。最适宜白芨原球茎诱导的培养基为1/2MS+1.5 mg/L 6-BA+1.0 mg/L NAA;原球茎的芽增殖的最适培养基为MS+0.5 mg/L 6-BA+0.1 mg/L NAA,增殖倍数达6.6;最佳分化培养基为MS+0.5 mg/L 6-BA+0.3 mg/L NAA+50.0 g/L土豆泥;最佳生根培养基为1/2 MS+0.5 mg/L NAA+70.0 g/L香蕉泥,生根率达100%;炼苗基质配方以黄土∶腐植土∶锯木粉按体积比4∶4∶2,白芨苗移栽成活率高。以白芨种子诱导原球茎获得的高效再生技术体系可以在白芨产业化发展中推广应用。     

珙桐叶片的脱分化和分化诱导研究

研究了以濒危植物珙桐叶片作为外植体诱导愈伤组织及分化再生植株.结果表明:本实验中,诱导愈伤组织的最佳培养基为1/2MS+2.0 mg/L IBA+1.0 mg/L 6-BA;愈伤组织继代的最佳培养基为1/2MS+3.0 mg/L IBA+1.5 mg/L 6-BA最佳分化培养基为MS+2.0mg/L 6-BA+1.0 mg/L IBA+0.2 mg/L GA_3,芽分化率为6.2%;生根最佳培养基为1/2MS+0.4 mg/L IBA,生根率为60%.     

黑节铁皮石斛原球茎诱导、再分化以及腋芽萌发和生根的初步研究

对黑节铁皮石斛的原球茎诱导、再分化以及腋芽萌发和生根进行了初步的研究,以期为黑节铁皮石斛的人工繁殖提供理论指导。采用植物组织培养和单因子试验的方法,获得了黑节铁皮石斛带芽茎段最佳的消毒方式为70%酒精处理30s后再用0.1%HgCl2处理20min。黑节铁皮石斛带芽茎段原球茎诱导的最佳培养基为MS＋KT1mg/L＋NAA0.1mg/L。黑节铁皮石斛带芽茎段原球茎再分化的最佳培养基为MS＋KT2mg/L＋NAA0.5mg/L。黑节铁皮石斛带芽茎段腋芽萌发的最佳培养基为MS＋KT2mg/L＋NAA0.5mg/L。黑节铁皮石斛带芽茎段生根的最佳培养基为1/2MS＋NAA0.5mg/L。这些实验结果为黑节铁皮石斛试管苗的工厂化生产奠定了技术基础。     

铁皮石斛原球茎生长分化及生根壮苗研究

目的:筛选适宜铁皮石斛原球茎生长分化及生根壮苗的培养基,提高继代扩繁系数和组培苗的质量.方法:在相同的培养条件下,把相同发育阶段的原球茎接种于含不同激素比例的培养基中生长;把丛生芽接种于蔗糖浓度不同的培养基中生长;把相同高度的幼苗接种于含不同附加物的培养基中生长;对结果所产生的不同生长状况进行综合分析.结果:原球茎的增殖以1/2MS添加BA2.0mg/L NAA0.5mg/L或BA3.0mg/L NAA0.5mg/L的激素比例为佳;原球茎分化以1/2MS添加BA2.0mg/L NAA0.2mg/L或BA3.0mg/L NAA0.2mg/L的激素比例为佳;丛生芽的生长中以30%蔗糖浓度的培养基为佳;生根壮苗中最佳的附加物为香蕉.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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