生菜(Lactuca sativa var ro mana Hort.)下胚轴愈伤组织的诱导与植株再生

通过对生菜下胚轴的愈伤诱导和植株再生的研究 ,发现诱导愈伤组织时 ,MS培养基中加 0 .5mg/L　 6 BA 1mg/L　 2 ,4 D 0 .1mg/LNAA效果最好 ,其出愈率达 94 %;愈伤组织分化为芽时 ,在MS 1.0mg/L　 6 BA 0 .0 5mg/L　NAA中分化频率最高 ,达 10 0 %.再生苗可在 1/ 2MS 0 .5mg/L　NAA中诱导生根成完整植株 .     

卡特丽亚兰的组织培养与快速繁殖的研究

作者以卡特丽亚兰开花植株茎尖和试管苗茎段或叶切段为外植体,成功地诱导形成原球茎并获得再生植株,筛选出了原球茎球诱导培养基：RE＝60mg/L BA(5mg/L BA 0.5-1mg/L NAA或IBA）＋0．5％－1％蔗糖;原球茎增殖培养基：MS（或KC）＋5mg/L BA 0.1(0.5)mg/L NAA(或0.5mg/L 1BA) 0.2%蛋白胨和分化及育苗培养基;KC＋0．3mg/L (0.5)NAA 10%香蕉匀汁＋0．1％活性炭。BA在原球茎的产生、增殖分化中起着主导作用。     

香石竹茎段无性系的建立

以香石竹无菌茎段为外植体成功获得再生植株，并建立快速无性繁殖系，茎段愈伤组织的诱导及芽点的分化最佳培养基是1／2MS BA1 2，4mg／L-D0．4mg／L，芽增殖的最佳培养基是MS BA0．5mg/L NAA0．5mg／L，根诱导最佳培养基是1／2MS IAA0．2mg／L，最佳移栽基质是炉碳渣。     

红掌叶片愈伤组织的诱导与植株再生

报道了红掌叶片愈伤组织诱导和植株再生的研究结果 ,试验表明 :诱导愈伤组织频率最高的培养基是MS BA 0 .5mg/L 2 ,4 D 0 .8mg/L ;较适于愈伤组织分化不定芽的基本培养基是N6 ,激素配比以BA 2 .5mg/L 2 ,4 D 0 .1mg/L和ZT 2 .5mg/L 2 ,4 D 0 .1mg/L为好 ;红掌试管苗生根较易 ;使用质量浓度为 0 .5mg/L的NAA ,2 ,4 D和IBA都能很好地诱导不定芽生根 ;富含有机质的疏松表土是理想的移栽基质 ,移栽成活率为 92 .3% .     

甜叶菊叶片离体培养及试管无性系的建立

研究了离体条件下甜叶菊（Stiuia rebaudiana Bertoni)叶片愈伤组织诱导和植株再生技术,离体培养以MS为基本培养基并附加300mg/L水解酪蛋白,离体叶片在BA 0．5mg/L和NAA 0．5mg/L的培养基上诱导形成愈伤组织,在BA 0．5mg/L和NAA0．05mg/L的培养基上可诱导愈伤组织分化不定芽,分化频率为100％,不定芽在White基本培养基并附 加NAA0．01mg/L的培养基上诱导生根,生根率可达100％,炼苗后移栽,成活率达95％以上。     

丹参组织培养及植株再生研究

以丹参的茎、叶、芽、花药为外植体,对丹参的组织培养及植株再生进行了较系统的研究。结果表明,茎、叶在MS附加BA和2,4－D不同组合的培养基上易形成愈伤组织,且生长速度快。芽增殖培养基以MS附加BA1．0－2．0mg/L、NAA0．1mg/L为佳。叶片、花药在MS附加BA1．0mg/L、NAA0.1mg/L的培养基上可诱导不定芽的产生。     

大花蕙兰茎尖培养研究

研究了大花蕙兰茎尖诱导原球茎、原球茎增殖及分化再生植株的条件.结果表明,茎尖在1/2MS NAA0.2 mg/L BA 3.0 mg/L的培养基上培养,原球茎诱导率最高;原球茎增殖的适宜培养基为1/2MS BA 5.0mg/L NAA 1.0mg/L AC 0.2%;原球茎分化的适宜培养基为1/2MS BA 2.0 mg/L NAA 0.2 mg/L AC 0.2%.     

大花蕙兰快速繁殖技术初报

通过对大花蕙兰的组织培养试验，筛选出B5＋BA1．0＋2，4－D2．0的组合对大花蕙兰花梗诱导类原球茎有明显作用。B5培养基较MS培养基更容易诱导花梗产生类原球茎。激素BA浓度在1．0－5．0mg/L之间，2，4－D浓度在0．5－2．0mg/L之间有利于诱导花梗产生类原球茎。筛选出MS＋BA1．0＋NAA0．5的组合对大花蕙兰类原球茎增殖有明显作用。采用井字形切割有利于类原球茎的增殖。     

盾叶薯蓣组织培养与快速繁殖研究

对盾叶薯蓣的茎、叶片、叶柄进行了愈伤组织的诱导、分化，以及多芽体的诱导、生根、移栽的初步研究，结果表明：（1）茎的愈伤组织诱导率最高，在MS＋6－BA0.5mg/L 2,4-D2.0mg/L上可达87.5%，但愈伤组织不易分化出苗；（2）腋芽能萌发形成多芽体，月繁殖系数达3－5，最适宜的多芽体诱导培养基是MS＋6－BA2.0mg/L NAA0.5-1.0mg/L＋椰汁10％；（3）无根苗在MS＋6－BA2.0mg/L＋NAA2.0mg/L培养基上能形成完整的再生植株。     

糯米藤的离体快繁系统的建立

对糯米藤（Memorialis hirta BL.Wedd.）进行了离体快繁研究。叶片和茎段在附加NAA0．5mg/L＋KT1．0mg/L或NAA0．5mg/L 6-BA 1.0mg/L的MS培养基上，诱导形成愈伤组织后再分化形成植株；腋芽在附加NAA0．1mg/L KT1.0mg/L或NAA0.1mg/L 6-BA1.0mg/L或IAA0.1mg/L 6-BA 1.0mg/L的MS培养基上诱导出丛生芽，并再生成植株。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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