白鲢(Hypophthalmichthys molitrix Cuvier et Valencienns)对常州市主要工业废水及部分有机毒物的回避反应

本文研究了白鲢对常州市四种主要工业废水及四种有机毒物的回避反应,其回避能力随废水及主要有机毒物的种类、浓度的不同而异,并与浓度成正相关。试验结果表明,白鲢能回避0.28％和1.12％染料废水;2.5％、5.0％和10.0％石油化工废水;4.5％和9.0％印染废水;6％、12％和24％化工厂有机废水。也能同避0.80mg/lα-硝基苯;1.25mg/l和5.00mg/l间硝基苯胺;4.0mg/l间—二硝基苯;4.0mg/l磷酸三丁酯。     

细辛等中药诱发小白鼠骨髓、外周红细胞微核作用的初步观察

各实验组以细辛0.4g/kg、半夏5g/kg和附子3g/kg给小白鼠灌胃,每天1次,连续12天,可增高微核出现率。骨髓多染红细胞微核出现率分别为10.3‰、16.0‰、19.1‰,对照组为1.1‰。外周红细胞微核出现率分别为1.14‰、1.62‰、1.99‰。对照组为0.05‰。结果表明,上述三种中药致微核作用及升高淋巴细胞的作用与对照组相比差异均非常显著(P<0.01)。各实验组动物的肾上腺与对照组相比,体积增大重量增加,差异非常显著(P<0.001)。     

用蚕豆根尖细胞微核技术研究发芽马铃薯的遗传毒理作用

为探讨发芽马铃薯的遗传毒理作用,用蚕豆根尖细胞微核监测技术对发芽马薯浸渍液的微核率进行了测定,结果表明：发芽马铃薯浸渍液的质量浓度为25g/L,50g/L,100g/L,200g/L时,蚕豆根尖细胞微核率分别为17．21‰,23．53‰,29．55‰,39．40‰,与阴性对照组相比存在显著性差异,相应浓度的未发芽马铃薯浸渍液对蚕豆根尖细胞微核率的形成与阴性对照组相比无显著性差异,实验结果提示发芽马铃薯浸渍液能显著诱发蚕豆根尖细胞微核的形成,利用蚕豆根尖细胞微核技术可以监测发芽马铃薯的遗传毒理作用。     

常州市主要工业废水及四种有机毒物对白鲢(Hypohythalmichthys molitrix)的急性毒性

本文用静态生物测试法研究常州市四个重点污染源及运河(常州——武进)水体中四种主要毒物对白鲢的急性毒性,获得工厂废水及主要毒物对鱼种96小时LC_(50)值分别为:染料厂2.07％。常州化工厂29.49％,石油化工厂23.5％,东风印染厂24.15％.α-硝基萘1.6mg/l,间硝基苯胺9.9mg/l,磷酸三丁酯6.6mg/l,澡二硝基苯7.2mg/l.根据毒物分级标准,染料厂废水评为“高毒”,其它工厂废水评为“中等毒”,四种毒物均评为“高毒”.对鱼毒性大小次序是:α-硝基茶>磷酸三丁酯>间二硝基苯>间硝基苯胺.建议安全浓度标准如下:染料厂0.21％,石化厂2.35％,化工厂3.0％,东印厂2.42％.α-硝基茶0.2mg/l,间硝基苯胺1mg/l,磷酸三丁酯0.66mg/l,间二硝基苯0.72mg/l.所得参数可为地区性工业废水排放标准及废水标准制订提供依据.     

利用水花生根尖微核技术(MCN)对马鞍山市废水的监测研究

利用水花生根尖微核可作为监测水体污染的新材料。其根尖细胞微核率ＭＣＮ‰，不仅可用于监测不同废水的污染程度，而且还能反映不同废水的富集程度及现状。     

尿殖系肿瘤患者周血培养细胞的微核观察

本文报导了17例尿殖系恶性肿瘤患者和20例非癌结石患者周血培养细胞的微核观察,结果:前者微核出现率为14.7‰,后者微核出现率为5.8‰。尿殖系中,恶性患者的微核出现率明显地高于非癌患者这一结果提示尿殖系患者的恶变倾向,可供临床参考。     

利用大蒜根尖细胞微核技术监测三湘江支流污染

利用大蒜根尖细胞微核技术对三湘江支流5个采样断面的水样进行监测评价.结果表明:①5个断面的水样均使大蒜根尖细胞微核率(MCN‰)明显增加,其中4个断面的水样测得的微核率与蒸馏水对照组相比差异极显著(P<0.01),1个断面的水样测得的微核率与蒸馏水对照组相比差异显著(P<0.05);②根据污染指数(PI)将5个断面的水质污染分为两个水平,即重污染和中污染;③以大蒜根尖细胞微核率为指标,监测三湘江支流水质污染的结果与水质监测结果基本一致;④5个断面的水样测得的微核率与COD_(Cr)、NH_3-N、TP等成正相关(P<0.05).     

天然橡胶加工厂废水质量调查初报 Ⅰ.化学需氧量和生化需氧量的测定

胶清废水是天然橡胶加工时的一种工业废水。其中含有约1％的蛋白质、0.05-0.3％的氨态氮及约0.01～0.03的还原糖等有机物质,因而具有较高的生化需氧量(BOD)和化学需氧量(COD)。本文主要报导两种不同类型加工厂(标准胶厂、浓缩胶乳厂)废水的BOD和COD的测定结果、讨论了取样方法对测定值的影响及各种温度之BOD与BOD_5~(20)之间的换算。     

硫酸盐法制浆黑液中的毒物有机酸和酚类污染物

硫酸盐法制浆黑液是毒性很大的工业废水。本文着重讨论该废水中毒物树脂酸、脂肪酸以及酚类化合物的毒性、来源、主要类型,以及富集、测定方法。根据我国情况,作者指出应该寻求用简易设备测定制浆废水中毒物的简便方法,开展对制浆废水的毒性分布的研究,制定主要毒物排放标准。     

利用蚕豆根尖微核技术检测颍河水质污染的研究

利用蚕豆根尖微核技术检测周口市颍河水质污染状况，结果表明全部受试水样均能引起微核率上升，二板桥采样点水样的微核率为17．71‰，胜利桥、地区医院、孙嘴桥、沙河口桥和周口大闸上游各水样的微核率分别为12．45‰，10.06‰,9.35‰,8.47‰和7．11‰，提示水体含有遗传毒性物质，并对污染原因进行了分析。     

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

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