植物激素对一品红愈伤组织和胚状体的作用

以一品红幼茎为外植体,接种在培养基(MS+ZT)0.5mg·L-1、NAA0.5mg·L-1、IBA0.5mg·L-1、2,4 D1.0mg·L-1、6 BA1.0mg·L-1诱导愈伤组织,其中以NAA0.5mg·L-1时愈伤组织诱导率最高,为96.4%.将继代培养的愈伤组织,接种到(MS+ZT)1.0mg·L-1+NAA0～2.0mg·L-1、IBA0～2.0mg·L-1、2,4 D0～2.0mg·L-1;(MS+6 BA)1.0mg·L-1+NAA0～2.0mg·L-1、2,4 D0 2.0mg·L-1培养基上,进行胚状体的分化培养,其中以ZT1.0mg·L-1+2,4 D0.5mg·L-1效果最好.     

利用从芽途径快速繁殖蝴蝶兰的研究

报道了利用从生芽途径快速繁殖蝴蝶兰的研究结果,试验表明:培养基MS+BA1.0mg·L-1+NAA0.05mg·L-1+GA30.5mg·L-1能够诱导花梗休眠芽转化为营养芽.花梗芽在培养基MS+BA5.0mg·L-1+NAA0.05mg·L-1上能够诱导产生丛生芽.在丛生芽增殖阶段,以BA12.5mg·L-1+NAA0.05mg·L-1的增殖效果最好.BA、KT、ZT均能诱导产生"丛生芽",其中以ZT和BA的诱导效果最好.另外,在增殖阶段,外植体采用双芽接较单芽接的增殖效果好.在生根阶段以1 2MS+NAA0.5mg·L-1+w=0.2%的活性炭+φ=10%的椰子水的生根效果较佳,生根率可达100%,且植株生长健壮.试管苗移栽在水苔上的成活率较高,成活率达96 7%.     

甘蔗组织培养中培养基的优化

比较了不同基本培养基 ,不同激素及其不同质量浓度的组合对甘蔗愈伤组织的诱导 ,不定芽的分化及其生根的效果 .结果表明 :MS + 2 ,4 -D 1～ 5mg·L-1培养基均可诱导愈伤组织的增殖 ;MS +KT 1.5～ 2 .0mg·L-1+ 6 -BA 2mg·L-1培养基对愈伤组织分化不定芽的效果最佳 ;1 2MS +NAA 1～ 4mg·L-1培养基对生根较好 .     

番茄高效再生体系的建立

比较了不同基本培养基,不同激素及其不同浓度组合对番茄愈伤组织的增殖、不定芽分化及其生根的效果.结果表明:MS+NAA0.02～0.10mg·L-1+6-BA3.0mg·L-1+蔗糖30g·L-1(pH=5.8)均可诱导愈伤组织的增殖,但以MS+6-BA3.0mg·L-1+NAA0.05mg·L-1+蔗糖30g·L-1最佳;MS+IAA0.1mg·L-1+6-BA2.0mg·L-1+蔗糖30g·L-1培养基对愈伤组织分化不定芽的效果最佳;MS+IAA0.1mg·L-1+蔗糖20g·L-1培养基对生根较好.     

鸡蛋枣的组织培养与快速繁殖技术

以鸡蛋枣的茎段为外植体,进行了芽的诱导和成苗的研究.结果表明:在MS+ZT1.75mg·L-1+KT2.0mg·L-1培养基,茎段可以分化不定芽.低浓度的NAA促进不定芽的形成,在MS+ZT1.75mg·L-1+KT2.0mg·L-1+NAA0.05mg·L-1中培养基芽的增殖系数达到4.2倍.在1 2MS+IBA0.8mg·L-1培养基中,试管苗的生根率达到95.0%.试验还就外植体的消毒和组培苗的移植进行了探索.     

植物生长调节物质对一品红组织培养中器官分化的效应

以一品红 (Euphorbia pulcherrima willd)幼茎诱导出的愈伤组织为外植体 ,以 MS为基本培养基 ,设计不同浓度的 ZT,6-BA,NAA,IBA,IAA,2 ,4-D等单因子和不同比值的细胞分裂素和生长素组合实验 ,探讨不同植物生长调节物质及其组合对一品红器官 (芽、根 )分化的效应结果表明 ,在根的诱导分化时 ,单因子 MS+NAA0 .5 mg·L- 1配方最为有利 ,诱导率为 45 .6% ;组合因子配方中 MS+IBA0 .2 +NAA 0 .1 mg· L- 1 最好 ,诱导率为 89.0 % .在芽的诱导分化时 ,单因子配方 MS+ZT0 .5 mg· L- 1最高 ,组合因子配方中以 MS+ZT1 .0 mg·L- 1 +NAA0 .1 mg·L- 1最有利 ,诱导率分别为 5 2 .1 % ,95 .3 % .     

玉米幼叶愈伤组织诱导和不定根的再生

以 7d龄左右的玉米 (ZeamaysL .)实生苗幼叶不同切段为材料 ,在添加不同植物激素的 1/ 2MS培养基上培养 ,2周后可以诱导出愈伤组织 ,第 2叶基部愈伤组织诱导率高于第 1叶 .MS预处理培养基中添加 1mg·L- 1呋喃腺嘌呤 (KT)或 1mg·L- 1苄基腺嘌呤 (BA)后 ,使诱导频率提高到 5 8.3%,并不同程度地诱导不定根的发生 ;诱导培养基中添加 1mg·L- 1KT或 1mg·L- 1BA对愈伤组织和不定根的诱导均有抑制作用 .当在诱导培养基中添加 5 0 0mg·L- 1水解酪蛋白(CH)时 ,诱导培养基中BA或KT对愈伤组织和不定根发生的抑制作用得到缓解 .     

花魔芋愈伤组织诱导研究

对花魔芋愈伤组织诱导过程中的多个影响因子进行了研究。试验表明 :以顶芽、侧芽、顶芽鳞片作外植体 ,顶芽鳞片在 10 %NaClO溶液中灭菌 2 5min ,顶芽、侧芽在 0 .1%HgCl2 溶液中灭菌2 0min ,外植体在 10 %柠檬酸溶液或 0 .5 %VC 溶液中切割 ,接种于 1/ 2MS BA 1mg·l-1 NAA0 .1mg·l-1 4 %蔗糖 0 .7%琼脂 (pH5 .8)培养基中 ,暗培养 (T :18- 2 0℃ ) ,花魔芋愈伤组织诱导率较高 ,均可达 45 %以上。     

曼地亚红豆杉愈伤组织诱导和继代培养中抑制褐化的研究

对曼地亚红豆杉茎段和叶片的愈伤组织诱导条件和愈伤组织继代培养条件进行了探讨,同时对愈伤组织继代培养中的褐化问题进行了分析.结果表明:具有较强分生能力的新生茎段和叶片能够得到很高的诱导率,与NAA相比,2,4 D在诱导中作用显著.含有3mg/L2,4 D+0 5mg/LNAA+0 2mg/L6 BA的MS培养基有利于愈伤组织的诱导.在继代培养中,2,4 D比NAA对愈伤组织生长的促进作用显著,6 BA对愈伤组织生长的促进作用极显著.在继代培养中发现在第20天就开始转移继代和提高愈伤组织与培养基接触面的氧气供给能够较好克服褐化.在含有5mg·L-12,4 D5+0 5mg·L-16 BA+1g·L-1AC的B5培养基上,愈伤组织细胞增殖倍数最大,达到4 7,褐化也得到部分控制.     

康泰凤梨的组织培养与快速繁殖研究

用康泰凤梨的侧芽作外植体进行培养，成功地建立了康泰凤梨的快速繁殖程序．康泰凤梨的侧芽基部切块接种在(1)MS BAl．5mg／L诱导培养基上，形成愈伤组织；愈伤组织在(2)MS BA1．0mg／L IBA0．5mg／L的培养基上诱导丛生芽及进行继代增殖培养，效果较好；不定芽在(3)MS IBA0．5mg／L NAA0．5mg／L的培养基上易生根。健壮的试管苗移栽2个月后，成活率达95％。     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has