大岩桐叶柄诱导再生植株

用大岩桐叶柄作为外植体,分别对试管苗诱导、增殖和生根条件进行了初步研究。结果表明:适宜诱导培养基以MS+6-BA2 0mg·L-1+NAA0 2mg·L-1+3%蔗糖+0 7%琼脂最佳,35d其诱导率为1 324,增殖培养基以MS+6-BA2 0mg·L-1+NAA0 1mg·L-1+3%蔗糖+0 7%琼脂为最好,30d其增殖倍数可达5 3倍。生根培养基以1/2MS+NAA0 6mg·L-1+3%蔗糖+0 7%琼脂为最好,生根率可达89 7%。     

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.     

射干幼茎愈伤组织及试管苗培养的研究

为保护野生资源,以射干幼茎为材料,应用植物组织培养技术,进行了愈伤组织培养、愈伤组织分化培养、试管苗培养和试管苗的移栽与定植的研究。结果显示,幼茎段培养愈伤组织的适宜培养基是MS+琼脂5.3 g·L-1+蔗糖38 g·L-1+2,4-D2.2 mg·L-1+6-BA 0.8 mg·L-1;愈伤组织分化无根苗培养的适宜培养基是1/2MS+琼脂5.3 g·L-1+蔗糖42 g·L-1+NAA0.05 mg·L-1+6-BA 1.4 mg·L-1;试管苗培养的适宜培养基是1/4MS+蔗糖10 g·L-1+琼脂5.3 g·L-1+IBA0.05 mg·L-1+IAA0.25 mg·L-1;试管苗移栽成活率为90.3%;定植成活率为96.0%。定植试管苗翌年正常开花结果,野生的射干的植物性状保持不变。     

苦苣菜下胚轴愈伤组织分化及试管苗培养研究

为保护苦苣菜野生资源,以苦苣菜下胚轴为材料,进行了愈伤组织诱导培养、分化培养、生根培养和试管苗移栽及定植的研究,结果表明:MS+琼脂4.8 g·L-1+蔗糖42 g·L-1+KT 0.4 mg·L-1+NAA 0.2 mg·L-1+2,4-D2.0 mg·L-1是愈伤组织诱导生长的适宜培养基;1/2 MS+琼脂4.5 g·L-1+蔗糖35 g·L-1+ZT 0.8 mg·L-1+NAA 0.1 mg·L-1是愈伤组织块分化培养的适宜培养基;1/4 MS+IAA 0.6 mg·L-1+琼脂4.3 g·L-1+蔗糖15g·L-1是生长芽试管苗培养的适宜培养基;温室内试管苗移栽成活率为91.7%;试管苗在山林旁定植成活率为97.1%,定植试管苗的植物学性状与实生苗基本一致.     

百脉根植株高频再生体系的建立

以百脉根的下胚轴为外植体材料,探究不同激素种类和不同浓度对百脉根愈伤组织的诱导、分化增殖及生根的影响.结果表明:诱导愈伤组织的最佳培养基为:MS+2,4—D 2.0 mg/L+KT 2.0 mg/L+3%蔗糖+0.7%琼脂;诱导愈伤组织分化最佳培养基为:MS+6-BA 1.0 mg/L+NAA 0.5 mg/L+3%蔗糖+0.7%琼脂;诱导不定芽生根的最佳生根培养基为:MS+NAA 0.01 mg/L+2%蔗糖+0.7%琼脂,生根率达100%;实验建立了一个高频的百脉根再生体系,为百脉根基因工程操作奠定了基础.     

唐古特白刺愈伤组织诱导及再生体系的研究

以唐古特白刺(Nitraria tangutorum Bobr.)子叶、下胚轴、根为外植体, 接种在不同浓度激素配比的培养基中, 研究愈伤组织的诱导及植株再生.结果表明: 子叶和下胚轴是诱导愈伤组织的良好外植体; 以MS补加2,4-D(0.5～1.0 mg·L-1)或6-BA(1.0～2.0 mg·L-1)+NAA(0.5～1.0 mg·L-1)可100%高频产生愈伤组织;在MS+6-BA 2.0 mg·L-1+NAA 0.5 mg·L-1培养基上,下胚轴可产生不定芽; 最佳增殖培养基为MS+6-BA 0.5 mg·L-1+NAA(0.5～1.0 mg·L-1),增殖系数为5.75; 最佳生根培养基为1/2 MS+IBA 0.5 mg·L-1,生根率达94.6 %.     

沙枣叶片愈伤组织诱导研究初报

以沙枣叶片作为外植体,以MS为基本培养基,用两种不同浓度激素的组合,筛选5组培养基进行继代愈伤组织及增殖诱导.结果表明,沙枣叶片诱导愈伤组织的最佳培养基为MS 6-BA 0.5 mg/L NAA 1 mg/L kT1 mg/L 2,4-D 2 mL 25 g蔗糖 6 g琼脂(pH=5.5),诱导率达86.67%;以MS 6-BA 0.5 mg/L NAA0.5 mg/L kT1 mg/L 2,4-D 2 mL 25 g蔗糖 6 g琼脂(pH=5.5)作为愈伤组织增殖培养较理想.     

胼胝兜兰的无菌播种和快速繁殖

1植物名称胼胝兜兰(Paphiopedilum callosum (Rchb.f.)Stein). 2材料类别种子.3培养条件种子萌发培养基:(1)1/4MS;(2)1/2MS;(3)MS;(4)花宝1号(美国Haponex公司产品,N:P:K=7:6:19)3.0 g·L-1.原球茎增殖和分化成苗培养基:(5)1/4MS+6-BA1.0 mg·L-1(单位下同)+NAA0.1;(6)1/4MS+6-BA1.0+NAA0.1+AgN031.0;(7)花宝1号3.0 g·L-1 +6-BA1.0+NAAO.1;(8)花宝1号3.0 g·L-1+6-BA1.0+NAA0.1+AgN031.0壮苗生根培养基:(9)花宝1号3.0 g·L-1+10%香蕉汁+1.0 g·L-1活性炭;(10)花宝1号3.0 g·L-1+10%香蕉汁+1.0 g·L-1活性炭+NAA1.0.以上培养基均添加2.0%蔗糖,0.58%琼脂固化,pH 5.4-5.6.培养温度为(25±1)℃,光照强度30-50μmol·m-2·s-1,光照时间10-12 h·d-1.培养基(1)～(8)均添加100 mL·L-1椰子乳,培养基(1)～(4)均添加活性炭1.0 g·L-1.     

紫苏离体再生体系的建立

以紫苏种子为材料,进行紫苏离体再生研究。试验结果表明:紫苏种子先用75%酒精处理30s,再用0.1%HgCl2消毒剂处理8min,在MS培养基上种子萌发率为43%;最佳不定芽诱导培养基为MS+0.5mg.L-1 NAA+3.0mg.L-1 6-BA;最佳增殖培养基为MS+0.1mg.L-1 NAA+2.0mg.L-16-BA;最适生根培养基为MS+0.2mg.L-1NAA,生根率达96.4%;移栽的成活率为74%。     

中间锦鸡儿组织培养体系的建立

以中间锦鸡儿茎段为外植体,建立了它的组织培养体系,具体条件如下:愈伤组织诱导培养基为MS+GA30.15mg/L+6-BA 0.2mg/L+NAA 0.4mg/L+AC 0.1g/L+蔗糖25g/L+琼脂6g/L,愈伤诱导率达33.33%;丛生芽诱导培养基为MS+6-BA 1.0mg/L+NAA 0.2mg/L+蔗糖25g/L+琼脂6g/L,诱导率为13.33%;诱导生根培养基为MS+IAA 0.5mg/L+GA30.15mg/L+蔗糖20g/L+琼脂6g/L,生根率达60%;将生根幼苗移至蛭石和营养土体积比为2∶1的基质中,移栽成活率高达100%.     

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