独蒜兰优质种苗快速培育研究

建立独蒜兰优质种苗快繁体系,为实现独蒜兰植物工业化育苗、保护野生植物资源和发展人工育种技术提供新的途径.本研究从不同基本培养基对独蒜兰种子萌发影响、丛生芽诱导增殖培养和无根苗生根壮苗等方面开展研究.筛选出影响独蒜兰种子萌发的最佳基本培养基为B5,培养30 d统计种子萌发率为92％;丛生芽诱导增殖的最佳培养基为B5+TDZ 2.0 mg/L+KT 0.5 mg/L+200.0 mg/L肌醇+2.0 g/L活性炭+20.0 g/L蔗糖,培养60 d丛生芽率诱导率为98.00％,平均产生丛生芽数为6.80个;最佳生根壮苗培养基为1/2MS+IBA 0.2 mg/L+6-BA 0.1 mg/L+2.0 g/L活性炭+30.0 g/L土豆泥+20.0 g/L蔗糖,培养60 d后统计生根率为100％,平均生根数为3.20条,平均鲜重为21.11 g.     

秋花独蒜兰原球茎液体快速增殖和分化培养研究

采用液体振荡培养的方法进行秋花独蒜兰原球茎的快速增殖和分化试验,分别研究了不同基本培养基、激素种类及其浓度、不同天然添加物对原球茎增殖的影响,在此基础上进行了原球茎快速分化的研究. 实验结果表明,秋花独蒜兰原球茎的快速增殖培养基为：花宝0.3％＋糖2％＋BA0.5 mg/L;而液体→固体培养基形式的分化培养比固体→固体培养基形式的分化速度快,且分化的芽的粗壮程度高于固体→固体培养基形式中的芽.     

6-BA与NAA不同浓度配比对大花蕙兰原球茎诱导的影响

以大花蕙兰茎尖为外植体,研究6-BA与NAA浓度梯度配比对大花蕙兰原球茎的诱导、增殖及分化的影响.结果表明:6-BA 1.0mg/L+NAA 0.5mg/L浓度配比下,大花蕙兰茎尖存活率达到93.3%;6-BA0.8mg/L+NAA 0.4mg/L浓度配比下,原球茎诱导率达到85.8%;6-BA 1.0mg/L+NAA 0.3mg/L浓度配比下,原球茎增殖系数达到4.59;6-BA 0.8mg/L+NAA 0.5mg/L浓度配比下,原球茎出芽率达到87.5%.首次报道采用6-BA 0.8mg/L+NAA 0.5mg/L浓度配比组合适合大花蕙兰茎尖培养,可同时获得较高的原球茎诱导率(80.8%)和出芽率(87.5%),比目前已报道的最佳原球茎诱导率(72.7%)和出芽率(76.7%)提高8%以上.     

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。     

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。     

南川百合组织培养与快繁技术体系研究

为加快南川百合的繁殖速度,对南川百合进行离体组织培养研究,结果表明:南川百合外植体的诱导率从大到小依次为:鳞片,花丝,子房,茎段,叶片.用鳞片作为外植体时,下部的诱导率最高,中部次之,上部最差.鳞片诱导丛生苗的最佳培养基为MS+6-BA 1.5mg/L+NAA 0.5mg/L;用花丝和子房作为外植体时,诱导丛生苗的最佳培养基为MS+6-BA 0.5mg/L+NAA 0.5mg/L;用再生苗的叶片作为外植体时,诱导丛生苗的最佳培养基为MS+6-BA 1.0mg/L+NAA 0.5mg/L;用再生苗的茎段作为外植体时,诱导丛生苗的最佳培养基为MS+6-BA 1.5mg/L+NAA 1.0mg/L.用于不定芽增殖的最佳培养基为MS+6-BA 1.0mg/L+NAA0.05mg/L.无根苗生根的最佳培养基为1/2MS+NAA 0.5mg/L,生根率可达到86.7%,移栽后成活率很高.     

花生体细胞胚和丛生芽的诱导及扩繁培养

以花生成熟胚培养成的无菌苗叶节为外植体 ,在高浓度 6-BA ( 3 0 mg/ L) MS培养基中 ,光强 2 0 0 0Lx,( 2 5± 3 )℃和 1 4 / 1 0光暗比条件下培养 ,50天后全部诱导分化出整齐一致的丛生芽 ,每个外植体平均产生 8.2 5个丛生芽 ;切下带少许丛生芽的组织块转入含 6-BA ( 3 0 mg/ L) ,LH ( 40 0 mg/ L)和 YE ( 0 .0 1 % )的 MS培养基中 ,可诱导出新的丛生芽 ,诱导率达 98.70 % ,平均出芽 1 3 .86个 .将花生成熟胚轴转接于含NAA ( 1 mg/ L)和 6-BA ( 3 mg/ L) MS培养基中 ,2 0～ 3 0天后 ,诱导出大量正常的体细胞胚 ,诱导率达 95.7% ,将胚切成小块转入含 2 ,4 -D ( 2 0 mg/ L) ,6-BA ( 3 mg/ L )和 LH ( 2 0 0 m g/ L) MS培养基中 ,经 1 5天培养 ,诱导出白色致密的胚性愈伤组织 .     

金线莲丛生芽的增殖和壮苗生根

通过对不同培养基的培养效果进行对比分析后筛选出适宜金线莲的生长的培养基分别是：丛生芽增殖最佳培养基为MS＋6-BA3mg/L＋NAA0.8mg/L,两个月的增殖系数达到4.5;壮苗最佳培养基为MS＋NAA2mg/L＋6-BA1mg/L＋香蕉汁20%;生根最佳培养基为1/2MS＋IBA1mg/L＋NAA1mg/L＋香蕉汁20%＋Ac0.8g/L,生根率达100%.     

桂竹香花托诱导再生植株的研究

用桂竹香带子房花托,在附加6-BA2.00～3.00mg/L+NAA0.1～0.5mg/L的MS培养基上诱导出愈伤组织后,转接到附加6-BA0.2mg/L+NAA0.01mg/L的MS培养基上,分化出的丛生芽状态最佳,丛生芽在附加NAA0.5mg/L的1/2MS培养基中可诱导出多而粗壮的根.     

竹节秋海棠离体快繁技术研究

以竹节秋海棠的幼嫩叶作外植体进行了组织培养 .结果表明：（ 1）在不同激素组合的培养基上均能诱导产生丛生芽,在 MS＋ BA2mg/L＋ 2.4－ D0.2mg/L中分化率高,芽质优;（ 2） MS＋ BA0.5mg/L＋ NAA0.2mg/L和 MS＋ BA0.5mg/L＋ 2.4－ D0.05mg/L培养基中有效苗获得率高,长势好;（ 3）再生植株在 1/2MS＋ IBA0.2mg/L＋ NAA0.2mg/L培养基中的生根率达 96％ .     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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