湖北省蕨类植物分布新纪录( 二)

报道了湖北省新分布的蕨类植物9种,隶属于7科9属,分别为西南假毛蕨Pseudocyclosorus esquirolii(Christ.)Ching、针毛鳞盖蕨Microlepia trapeziformis(Roxb.)Kuhn、康定铁角蕨Asplenium kangdingense ChingH.S.Kung、贯众叶溪边蕨Stegnogramma cyrtomioides(C.Chr.)Ching、阔鳞轴鳞蕨Dryopsis maximowicziana(Miq.)HolttumP.J.Edwards、华东膜蕨Hymenophyllum barbatum(v.d.B.)HKBak.、薄叶双盖蕨Diplazium pinfaense Ching、曲边线蕨Leptochilus ellipticus var.flexilobus(Christ)X.C.Zhang、戟叶盾蕨Neolepisorus ovatus(Bedd.)Ching f.deltoidea(Baker)Ching.引证标本均存于中南民族大学植物标本馆.     

第一批公布的《国家重点保护野生植物名录》

二级保护物种蕨类植物观音座莲科法斗观音座莲(Angiopteris sparsisora)、二回原始观音座莲(Archangiopteris bipinnata)、亨利原始观音座莲(A.henry-i)、铁角蕨科对开蕨(Phyllitisjaponica)乌毛蕨科苏铁蕨(Brainea insignis)天星蕨科天星蕨(Christensenia assamica)桫椤科(所有种)(Cyatheaceae spp.)蚌壳蕨科(所有种)(Dicksoniaceae spp.)鳞毛蕨科单叶贯众(Cyrtomium hemionitis)七指蕨科七指蕨     

五种鳞毛蕨科植物总黄酮含量及抗氧化活性分析

采用铝盐显色分光光度法研究了5种鳞毛蕨科植物的总黄酮含量,并对其抗氧化活性进行分析.结果表明:所研究的5种鳞毛蕨科植物的总黄酮含量在5%~8%;狭顶鳞毛蕨的总黄酮含量最多(8.24%),其次是半岛鳞毛蕨(6.53%)和戟叶耳蕨(5.2%),变异鳞毛蕨(5.01%)和暗鳞鳞毛蕨(5.01%)的总黄酮含量最低;5种鳞毛蕨科植物的黄酮提取液具有良好的抗氧化能力,且提取的黄酮类化合物的添加量在实验剂量范围内与其抗氧化活性(铁还原力、DPPH自由基清除活性、ABTS+清除活性)呈正相关.为鳞毛蕨科植物资源的开发利用提供参考.     

薄鳞蕨属(Leptolepidium)——河南中国蕨科-新记录属

报道了河南蕨类中国蕨科(Sinopteridaceae)植物-新记录属和-新记录种:薄鳞蕨属(Leptolepidium Hsing et S.K.Wu)和华北薄鳞蕨Leptolepidium kuhnii(Milde)Hsing et S.K.Wu.     

《河南植物志》蕨类植物补遗

增补《河南植物志》蕨类植物(Pteridophyta)6种2变种:栗柄金粉蕨(变种)、球腺肿足蕨、云南铁角蕨、河南瓦韦、太白瓦韦、褐柄剑蕨、多果满江红(变种)、细叶满江红.     

基生鳞毛蕨及其混淆种的分类订正研究

作者对基生鳞毛蕨Dryopteris basisora H.Christ及其混淆种类进行分类订正研究.承认基生鳞毛蕨D.basisora H.Christ、硕果鳞毛蕨D.fructuosa(H.Christ) C.Chr.和脉纹鳞毛蕨D.lachoongensis (Beddome) B.K.Nayar S.Kaur为独立的种,将D.pseudovaria (H.Christ) C.Chr.作为硕果鳞毛蕨D.fructuosa (H.Christ) C.Chr.的异名处理.文中附有这3个物种的分类检索表、分类特征照片、文献引证和地理分布等.     

广西蕨类植物新记录

本文报道广西蕨类植物新纪录6种:包括鳞毛蕨科的半岛鳞毛蕨Dryopteris peninsulae、同形鳞毛蕨D.uniformis和观光鳞毛蕨D.tsoongii,中国蕨科的黑足金粉蕨Onychium contiguum、金星蕨科的星毛紫柄蕨Pseudophegopteris levingei以及叉蕨科的截头肋毛蕨Ctenitis truncata。引用的标本均存放于中科院上海辰山植物科学研究中心标本馆(CSH)。     

具芒复叶耳蕨及其近缘种的分类订正研究

对复叶耳蕨属中的具芒复叶耳蕨及其近缘种类刺头复叶耳蕨和缩羽复叶耳蕨进行分类订正研究.确认具芒复叶耳蕨Arachniodes aristata(Forster)Tindale、刺头复叶耳蕨A.exilis(Hance)Ching和缩羽复叶耳蕨A.reducta Y.T.Hsieh et Y.P.Wu分别为3个独立的种.作者列出分种检索表,指出每种的主要分类特征.还列出每种的文献引证和地理分布并附有彩色照片.     

濒危植物七指蕨的孢子萌发和光合特性研究

七指蕨(Helminthostachys zeylanica)目前在我国仅零星分布于台湾、海南和云南的西双版纳,其种群数量日趋减少,已被列为国家二级重点保护植物.本研究从七指蕨的孢子萌发特性和光合特性2方面入手,探讨七指蕨可能的濒危机制,为七指蕨的保护和资源利用提供科学依据.结果显示:①七指蕨孢子萌发率极低,是导致其自然更新较弱的原因之一;②七指蕨与瓶尔小草(Ophioglossum vulgatum)等其他蕨类植物相比,光补偿点(LCP)接近,但七指蕨的光饱和点(LSP)和最大净光合速率(Pmax)处于较低水平.这一结果说明,七指蕨属于典型的阴生性植物,对光环境的适应范围较窄,强光下碳同化能力有限.森林植被的破坏导致光环境的改变,可能对七指蕨的生长、发育和繁殖造成巨大的威胁.因此,保护森林植被对于保护濒危植物七指蕨至关重要.     

河北省蕨类植物分布新记录

报道了1种、1变种蕨类植物河北分布新记录,它们是:禾杆蹄盖蕨Athyriumyokoscense(Franch.etSav.)Christ.和疏羽香鳞毛蕨Dryopterisfragrans(L.)Schottvar.remotiuscula(Kom)Kom。     

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