饰纹姬蛙Microhyla ornata(Dumeril et Bibron)生殖频次初探

本文首次报告了饰纹姬蛙Microhyla ornata的生殖频次。在实验室人工鉰养条件下,从五月至九月上旬。5只供试的雌蛙中有两只产卵3次,一只产卵4次,一只产卵5次,一只产卵6次。事实表明饰纹姬蛙是一年多次产卵的蛙类。     

海南岛稻田饰纹姬蛙的食性分析

对采自海南岛稻田的414只饰纹姬蛙,采用洗胃法作食性分析,分别计算了它们的食物数量和频次百分比、多样性指数、百分率相似性指数、营养生态位宽度、营养生态位重叠值和有益系数等．分析和统计的结果显示,饰纹姬蛙共取食了6纲19目59科的物种,雌雄个体的取食食性差异不显著,不同季节的取食食性差异也不显著,总有益系数、不同性别及不同季节的有益系数分别为V总=52．8％、V♀=57．26％、V♂=51．13％、V春=39．88％、V夏=40．68％、V秋=22．76％、V冬=60．47％．     

河蛙早期胚胎发育研究

本文对河蛙 (Rana(Aquarana)heckscheriWright) )早期胚胎发育进行了研究。用人工催产和人工授精方法获得受精卵。在水温 2 1～ 2 6.5℃下 ,从受精卵开始至鳃盖完全闭合为止的整个胚胎发育历时 2 2 6小时 37分。河蛙的早期胚胎发育可划分为 2 6期。胚胎发育特点与牛蛙、虎纹蛙相似 ,但纤毛动作期前的发育阶段比牛蛙发育速度快 ,以后各发育阶段较慢 ,在 14～ 18℃的低温下 ,河蛙胚胎发育良好 ,虎纹蛙在同一温度下胚胎停止发育 ,甚至死亡     

竹叶蛙（Rana versabilis）的早期胚胎发育

报道了福建产竹叶蛙的早期胚胎发育，自受精卵期到鳃盖完成期共分为２５个时期其发主育过程及形态特征与蛙科其他种类基本相似，但也有一些特异之处。在水温２０－２４℃以下，其胚胎发育的全过程历时２２６ｈ２５ｍｉｎ。     

浙江金华五种蛙LDH同工酶的比较研究

采用聚丙烯酰胺凝胶电泳技术,研究了浙江金华五种蛙：黑斑蛙;泽蛙、饰纹姬蛙、黑眶蟾蜍和牛蛙的心肌、肺、肾、胃、皮、舌、后肢肌肉和肝共8种组织的乳酸脱氢酶（LDH）同工酶,结果显示LDH具有明显的种族特异性和组织特异性,即不同动物和同种动物的不同组织都有各自的LDH同工酶谱型。因此,可以用它们作为物种的附加指标。     

高山蛙的早期胚胎发育及分期的研究

高山蛙（ＡｌｔｉａｎａＰｒａｋｅｒｉＳｔｅｊｅｇｅｒ）拉萨地区一种常见的,数量较多的无尾两栖类。本文详细研究了１６－２２℃条件下它的正常胚通渠道胎发育分期及其外部形态变化,根据胚胎发育的形态特征及具体情况,高山蛙的早期胚胎发育可以分成２０个时期,以人工授精开始到蝌蚪的鳃盖封闭为止,共需２１２个小时,比黑斑蛙（ＲａｎａＮｉｇｒｏｍａｃｕｌａｔａ）和中华大蟾蜍（ＢｕｆｏＢｕｆｏＧａｒｇｒｉｚａｎｓ）,花背蟾蜍（ＢｕｆｏＲａｄｄｅｉＳｔｒａｕｃｈ）等要慢。高山蛙发育过程的形态特征和其它无尾两栖类相似,但在某些方面有所不同,本文对它的早期胚胎发育进行了分析和比较。     

吉安市郊区稻田环境两栖动物多样性研究

两栖动物是生态系统的重要组成部分,也是环境健康的指示动物。两栖动物多样性研究是生物多样性研究的重要领域。2010年10月至2012年10月,我们对吉安市郊稻田环境的两栖动物进行了调查。结果表明：吉安市郊稻田环境有两栖动物8种,隶属1目4科。动物区系为广布种3种,东洋界5种。生态类型为静水型3种,陆栖静水型4种,树栖型1种。泽陆蛙为稻田环境中的优势种,饰纹姬蛙为亚优势种。     

虎纹蛙的早期胚胎发育

报道了虎纹蛙的早期胚发育,自受精卵期至鳃成期共分２５时期,其发育进程及各期胚胎的形态特征与一般蛙科种类基本相似,但其受精卵期和８细胞期有明显的特异之处,在水温１８－２３℃下,其胚胎发育的全过程历时约１２６ｈ。     

泽蛙♀×虎纹蛙♂杂种胚胎发育过程中三种酶的同工酶酶谱分析

利用聚丙烯酰胺垂直平板电泳法研究泽蛙♀×虎纹蛙♂杂种及其父母本胚胎发育过程中的酯酶、苹果酸脱氢酶、乳酸脱氢酶的同工酶酶谱。结果显示:(1)大多数母体酶带在杂种胚胎发育的初期出现并一直持续到晚期;(2)有些父本酶带在杂种胚胎发育到一定时期(肌肉效应期、鳃循环期)出现;(3)有些父本酶带和一条母本酶带始终不出现在杂种胚胎酶谱中;(4)发育后期有些杂种胚胎的同工酶酶谱出现异常。初步探讨了父母本因素对杂种后代同工酶的影响。     

日本林蛙的器官发育：呼吸,循环,尿殖系统和感觉器官的发育

通过对日本林蛙早期胚胎发育的观察和出膜至变态蝌蚪、幼蛙及成体的系统解剖,对呼吸,循环、泌尿、生殖系统和感觉器官的发生,发展与变化过程进行了描述和讨论.     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

正~~