欧洲七叶树的离体培养及快速繁殖

对欧洲七叶树(Aesculushippocastanum L．)离体培养和高效的组培快速繁殖体系进行研究。结果表明，高约2cm的无菌苗在MS 0.6mg／L 6BA 0.0mg/L NAA或MS 0.4～0.6mg／L ZT 0.1mg／L NAA培养基上培养15d左右可诱导出不定芽，分化频率为100％，平均每株产芽35.7个；MS 0.2mg／L 6-BA 0.1mg／L NAA 10mg／L AD培养基有利于芽伸长；生根培养基为1／2MS 0.4mg／L NAA 0.2mg／L IBA时，生根率可达75％。     

八宝景天茎段的组织培养和快速繁殖①

以八宝景天茎段为外植体,以MS为基本培养基,对八宝景天外植体消毒、不定芽诱导、继代增殖和生根培养基进行筛选试验,建立了八宝景天组织培养快繁技术体系。结果表明:75%C_2H_5OH 30s+0.1%HgCl_2 6min为八宝景天茎段消毒的最佳方法;MS+6-BA 2.0mg/L+NAA 0.1 mg/L为不定芽诱导的最佳培养基;MS+6-BA 3.0mg/L+NAA 0.1mg/L为继代增殖培养的最佳培养基;不定芽诱导生根的最佳培养基为1/2MS+NAA 0.1 mg/L或1/2MS+IBA 0.1 mg/L,生根率达100%。     

叶用莴苣组织培养研究

以叶用莴苣(LactucasativaL)栽培品种的幼嫩叶片为实验材料,对叶用莴苣的组织培养进行了研究,探讨愈伤组织的形成、愈伤组织分化成芽和生根的条件.结果如下6BA和NAA的浓度影响叶用莴苣愈伤组织的形成、分化和生根培养,诱导愈伤组织的最适培养基为MS+6BA(0.5mg/L)+NAA(0.1mg/L),最适分化培养基为MS+6BA(0.5mg/L)+NAA(1.0mg/L),最适生根培养基为1/2MS+NAA(0.1mg/L).     

兰州百合和野百合组织培养及快速繁殖研究

以兰州百合（Lilium davidii Var.Unicolor (Hoog)Cotton)和野百合（Lilium brownii F.E.Brown ex Miellez) 鳞茎及叶片为外植体获得再生植株，并建立起快速无性繁殖系。兰州百合鳞茎的最佳诱导培养基为MS＋0．6－1．0mg/LBA＋0．2mg/LNAA；芽增殖培养基选MS＋0．5－0．6mg/LBA 0.1mg/L NAA；生根培养基为1／2MS＋0．2mg/l IAA 0.1%活性炭。野百合鳞茎及叶的最佳诱导培养基分别为MS＋0．1－0．5mg/LBA 0.1-0.2mg/L NAA或0.5mg/L IAA和MS＋0.7mg/L BA 0.07mg/L NAA；鳞茎诱导的芽的增殖培养基为MS＋0.2-0.4mg/L BA 0.1mg/L NAA；生根培养基为1／2MS＋0.15mg/L NAA 0.1%活性炭。     

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。     

旱柳体外培养与直接分化再生系统的建立

给出了旱柳体外培养的方法:9月份至12月份采集1~2 a生枝条上带腋芽的茎段,经过筛选确定MS+0.5 mg/L 6-BA+0.1 mg/L NAA为最佳诱导培养基,平均每个芽点产生的不定芽数量为3.5个,20 d后苗高为1.8 cm;不定芽在MS+0.1 mg/L 6-BA+0.2 mg/L NAA培养基中继代增殖及生长较好,为适宜的增殖培养基;在形成的不定芽中有些不定芽起源于单株苗的切口基部,因此,初步建立了旱柳的直接分化再生系统,可为旱柳的遗传转化等研究奠定基础.经过壮苗处理的幼苗在MS+0.2 mg/L NAA培养基上的生根率达100%,且生根量多,幼苗生长健壮.生根苗移栽至V(草炭土)V(河沙)为3 1的混合基质中,60 d后成活率为90%左右.     

美国月桂樱的组织培养及植株再生

以春季萌发的美国月桂樱嫩枝为外植体诱导丛生芽,在MS 0.5 mg/L BA 0.01 mg/L NAA的培养基上.其丛生芽诱导率达100%,在继代培养基中选择MS 1.0 mg/L BA 0.1 mg/L NAA培养基.不定芽增殖较快,后将增殖苗接入MS 1.0mg/L KT 0.1 mg/L NAA培养基上壮苗,其生长状态最好.结果发现,赤霉素对芽的伸长没有效果.当芽伸长至3～4 cm时,切下置于1/2MS 1.0 mg/L NAA的生根培养基中,生根率达100%,移栽成活率达40%.     

食用百合卷丹离体培养再生体系的建立

选取食用百合卷丹的鳞片作为外植体,以MS为基本培养基,添加6-BA和NAA的不同植物激素组合,分组进行不定芽诱导、继代增殖和诱导生根培养。结果表明,鳞茎的中层鳞片具有较强的不定芽分化能力,6-BA 0.5mg/L＋NAA 0.1mg/L的激素组合适宜于鳞片的不定芽分化和继代增殖,而最利于诱导生根的激素组合为NAA 1.0mg/L＋6-BA 0.1mg/L。组培苗经过60天左右培养可在培养基中直接产生小鳞茎。     

大花蕙兰离体培养和快速繁殖技术的研究

以大花蕙兰茎尖作为外植体进行了组织培养繁殖技术的研究。结果显示:茎尖诱导芽的出苗整齐。适宜诱导增值的培养基为MS 6-BA1.0mg/L NAA0.1mg/L 0.6g/L活性炭,原球茎诱导率达85%。分化培养基为MS 6-BA1.5mg/L NAA0.5mg/L 活性炭0.6g/L,分化率74%。生根培养基1/2MS NAA1.0mg/L 多效唑0.2mg/L 蔗糖20g/L,琼脂5g/L固化培养,生根率98%。     

甘蓝型油菜萝卜胞质不育恢复材料测交F4代的快繁生根及愈伤组织诱导

利用油菜萝卜胞质不育恢复材料测交F4代种子,在附加各种不同激素浓度组合的MS培养基上诱导丛生芽、生根及愈伤组织诱导,结果表明在MS培养基中添加1.0mg/L 6-BA+0.1mg/L NAA对诱导丛生芽有较好的效果,1/2MS培养基对小芽生根效果最好,在MS培养基中添加0.5mg/L 6-BA +0.1mg/L NAA+0.25mg/L GA3+0.1mg/L 2,4-D对诱导愈伤组织效果最好.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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