6株越橘实生苗的染色体核型分析

以6株越橘实生苗为材料,去壁低渗火焰干燥法制片后观察记录染色体数,并进行染色体核型分析.实验结果表明:所有实验材料均属2B核型.其中1号材料体细胞染色体数目为48,核型公式为2n=4x=34 m+12sm(2SAT)+2T;2号材料体细胞染色体数目为48,核型公式为2n=4x=48=32 m(2SAT)+10sm(2SAT)+4st+2T;3号材料体细胞染色体数目为48,核型公式为2n=4x=48=38 m(2SAT)+8sm+2T;4号材料体细胞染色体数目为48,核型公式为2n=4x=48=30 m(4SAT)+12sm+6st;5号材料体细胞染色体数目为24,核型公式为2n=2x=24=20 m+4sm(2SAT);6号材料体细胞染色体数目为24,核型公式为2n=2x=24=16 m(2SAT)+6sm+2st.     

山东6种植物的染色体研究

对山东6种植物进行了染色体研究．白英(Solanum lyratum Thunb．)染色体数目为2n=24。核型公式K(2n)=2x=24=20m 4sm,核型“1A”;葎草(Humulus scandens(Lour．)Merr．)染色体数目为2n=16,核型公式K(2n)=2x=16=8m 8sm,核型“2A”;白刺花(Sophora vicifoliaHance．)染色体数目为2n=18。核型公式K(2n)=2x=18=2M 14m 2sm,核型“1A”;有斑百合(Lilium concolor var ．pulchellum(Fisch．)Regd．)染色体数目为2n=24,核型公式K(2n)=2x=24=4m 2sm 6st 12t,核型“3A”;野韭(Allium ramosum L.)染色体数目为2n=16 1B,核型公式K(2n)=2x=16=12m 2sm 2st 1B,核型“2A”;狼尾花(Lysimachia barystachys Bge．)染色体数目为2n=24,核型公式K(2n)=2x=24=14m 10sm,核型“2A”。     

冬凌草的染色体数目及核型分析

利用Gimesa显带技术对冬凌草进行了染色体数目和染色体核型分析,研究结果表明:冬凌草染色体数目为2n=2x=24,相对长度组成为2n=2x=24=10M2 14M1,核型公式为K(2n)=2x=24=16m 8sm.所研究中,G-显带条纹数目虽然有限,但能准确的反映染色体结构特点,从而提高染色体识别的准确性和核型分析的精确性.从染色体水平初步推测冬凌草在系统演化上可能属于较原始的种类.     

六株越橘实生苗的染色体核型分析

以六株越橘实生苗为材料,去壁低渗火焰干燥法制片后观察记录染色体数,并进行染色体核型分析。实验结果表明：所有实验材料均属2B核型。其中1号材料体细胞染色体数目为48,核型公式为2n=4x=34m+12sm(2SAT)+2T;2号材料体细胞染色体数目为48,核型公式为2n=4x=48=32m(2SAT)+10sm(2SAT)+4st+2T;3号材料体细胞染色体数目为48,核型公式为2n=4x=48=38m(2SAT)+8sm+2T;4号材料体细胞染色体数目为48,核型公式为2n=4x=48=30m(4SAT)+12sm+6st;5号材料体细胞染色体数目为24,核型公式为2n=2x=24=20m+4sm(2SAT);6号材料体细胞染色体数目为24,核型公式为2n=2x=24=16m(2SAT)+6sm+2st。     

钝叶决明核型分析

决明核型报道存在不一致性,本研究采用常规切片和显微分析技术对钝叶决明(Cassia obtusifoliaL.)染色体数目、核型、体积等进行了系统研究.结果表明:钝叶决明根尖细胞为2n=24的丝状染色体;核型公式为K(2n)=24=24 m;染色体相对长度组成为2n=24=4L+8 M2+6 M1+6S,属于"1B"型.全染色体总长为54.17μm,长臂总长31.49μm,核型不对称系数为58.13%.染色体总体积53.17μm3.钝叶决明染色体为2n=24形态清晰的丝状染色体,与前人2n=22的点状小染色体和2n=26的报道不同.     

青藏高原东缘2种风毛菊属植物的核型研究

对产于青藏高原东缘2种风毛菊属(Saussurea D C.)植物的染色体数目和核型进行了研究.结果表明:重齿风毛菊(S.katochaete)的染色体数目和核型为2n=2x=32=10m 16sm 6st,而弯齿风毛菊(S.przewalskii)染色体数目和核型为2n=2x=32=10m 22sm.根据Stebbins 提出的核型分类原则,这2个种的核型分别为3B和 2B型.     

蓝萼香茶菜和益母草的染色体核型研究

对产自中国黑龙江扎兰屯地区的蓝萼香茶菜[Isodon japonica (Burm．f．)Hara var．glaucocalyx (Maxim．) Hara]和齐齐哈尔地区的益母草(Leonurus japonicus Houtt．)进行染色体观察和核型分析。蓝萼香茶菜染色体数目为2n=24,益母草染色体数目为2n=20。问期核,蓝萼香茶菜和益母草均为复杂染色体中心型。染色体核型公式分别为K (2n)=2x=24=2M 18m 4sm 和K (2n)=2x=20=6m 14sm,核型均为“2A”型。染色体相对长度组成分别为2n=24=210 8M2 14M1和2n=20=10M2 10M1。     

酸枣的核型研究

本文研究酸枣的核型。结果表明酸枣的体细胞染色体数目为2n=24。核型公式为:2n=2x=24=14m+6sm十4t,中部和亚中部着丝粒染色体占到83.3％,为对称性核型,该材料的核型为国内外首次报道。     

青藏高原东缘风毛菊属中两种植物的核型报道

利用压片法研究青藏高原东缘两种风毛菊属(Saussurea DC.)植物的染色体数目和核型,结果表明,紫苞雪莲(S.iodostegia)和抱茎风毛菊(S.chingiana)的染色体数目和核型分别为2n=2x=32=18m+14sm,2n=2x=28=24m+2sm+2st.根据Stebbins提出的核型分类原则,这2个种的核型都为2A型.2个种的染色体中均未发现随体.     

矢车菊和大花金鸡菊的核型研究

对矢车菊和大花金鸡菊的染色体进行了研究。结果显示,矢车菊(Centaurea cyanus L．)染色体数目为2n=48,核型公式为K(2n)=4x=48=20m 28sm,相对长度组成为2n=48=4L 24M2 12M1 8S,核型为“2A”;大花金鸡菊(Coreopsis grandifiora Hogg．)的染色体数目为2n=26,核型公式为K(2n)=2X=26=26m,相对长度组成为2n=26=14M2 10M1 2S,核型为“1A”．     

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