芦笋汁的抗突变作用

用微核（MN）试验、姐妹染色单体交换（SCE）及精子畸形试验探讨芦笋汁对环磷酰胺（CTX）致突变作用的影响,结果表明,单纯芦笋汁对小鼠骨髓细胞MN和SCE及精子畸形均无明显影响,但一定剂量芦笋汁可使CTX诱发的MN率（6．00％）降低（5．03％－2．66％）,SCE（29．22次／细胞）减少（26．40－13．37次／细胞）,精子畸形率（6．10％）下降（5．12％－2．86％）,均呈现剂量－效应关系。     

海萝多糖抗突变与抗肿瘤作用的研究

用海萝多糖粗提物灌胃昆明种小鼠,观察海萝多糖粗提物对环磷酰胺(CP)诱发小鼠染色体突变和精子畸变的抑制作用和对荷S180肉瘤小鼠的抑瘤作用.实验结果显示:海萝多糖粗提物可使环磷酰胺诱发的小鼠骨髓嗜多染红细胞(PCE)微核率和精子畸形率明显降低,具有显著的抗突变作用,且呈现一定的剂量效应关系;海萝粗多糖对S180肉瘤也有明显的抑制作用,并有一定的剂量关系.结果表明,海萝多糖粗提物有明显的抗突变、抗肿瘤作用.     

桑黄菌质多糖的固态发酵及其抗氧化作用

实验采用固态发酵的方法,将经液态发酵产生的桑黄菌球接种到固态培养基中继续发酵,寻找最佳培养基并对其进行优化,确定最佳培养基配方。提取桑黄菌质多糖,灌胃给予环磷酰胺(CP)创伤小鼠,观察其对小鼠血清和肝组织中超氧化物歧化酶(SOD)活性和丙二醛(MDA)质量分数的影响。抗氧化实验表明,桑黄菌质多糖可明显提高小鼠血清和肝组织SOD活性,降低MDA质量分数,具有抗脂质过氧化的作用。     

桑黄粗多糖对肿瘤细胞增殖及转移相关能力的抑制作用

研究了桑黄粗多糖（PL）对高转移卵巢癌细胞（HO-8910PM）和乳腺癌细胞（Bcap-37）增殖和转移相关能力的影响及其作用的机制.研究结果表明,桑黄粗多糖能有效抑制裸鼠移植瘤的生长,抑制率为65.37%;对离体培养的HO-8910PM和Bcap-37细胞的抑制率分别达到15.53%和23.81%;500 ind/ml PL作用于HO-8910PM细胞96 h可诱导其凋亡,通过细胞周期G0/G1期阻滞而抑制细胞增殖和诱导细胞凋亡;PL能显著抑制HO-8910PM的黏附、侵袭和迁移等肿瘤转移相关能力.桑黄粗多糖具有抑制肿瘤细胞增殖及肿瘤转移的作用.     

三种植物根尖细胞微核率的比较

本文以蚕豆、洋葱、绿豆根尖为材料,以不同浓度环磷酰胺（CP）为诱变剂,测定这三种植物根尖细胞的微核率．结果表明：1．0μg／ml至100．0μg／ml各浓度组诱发下,蚕豆根尖细胞的微核率明显高于绿豆根尖细胞的微核率（P＜0．001）,也高于洋葱根尖细胞的微核率（P＜0．001）．     

冬虫夏草抑制诱变效应的初步研究

在环磷酰胺诱导下,小鼠精子畸形率显著增高。本文以精子畸形率为检测指标,观察冬虫夏草抗环磷酰胺的诱导。发现冬虫夏草本身无诱变活性且对诱发的小鼠性细胞的遗传损伤有很好的保护作用。     

汾河太原段冬季污水对小鼠肝脏毒理效应探究

采用连续灌胃处理小鼠的方法研究了汾河太原段上游和下游不同地点的冬季污水对小鼠肝脏的毒理作用．结果表明：本实验条件下冬季不同地点水样都使小鼠的微核显著增加（P〈0．01），核分裂指数显著下降（P〈0．01），且存在剂量一效应关系；相同处理浓度下，不同地点之间差异显著（P〈0．01）；而不同剂量水样处理间的小鼠的肝脏鲜重比有极显著差异（P〈0．01），说明汾河太原段的污水对小鼠肝脏有极显著的毒害作用（P〈0．01）：上下游水样比较，下游的水样毒害作用更显著（P〈0．01）．     

五指毛桃拮抗环磷酰胺诱发的遗传损伤效应

目的探讨五指毛桃对环磷酰胺所致小鼠遗传物质损伤的拮抗效应.方法 30只SPF级昆明种雄性小鼠,随机分为阴性对照组、阳性对照组及五指毛桃高（20g/kg）、中（10g/kg）、低（5g/kg）3个抗突变组.抗突变组用五指毛桃水提液灌胃,阴性对照组、阳性对照组灌以等量生理盐水,1次/d,连续15d.于第14 d,除阴性对照组外,各组小鼠腹腔注射环磷酰胺40mg/kg,24h后重复注射一次.用微核试验,检测五指毛桃水提液对环磷酰胺诱发小鼠骨髓嗜多染红细胞和睾丸生精细胞微核发生率的影响.结果抗突变组的骨髓嗜多染红细胞和睾丸生精细胞微核率均明显降低,与阳性对照组比较有统计学意义（P〈0.01）,并且随着五指毛桃液浓度的增高,微核率逐渐降低.结论五指毛桃可以拮抗环磷酰胺诱发的小鼠遗传物质损伤,提示五指毛桃有一定的抗突变作用.     

香菇多糖口服液缓解小鼠体力疲劳的功能检测

目的：检测香菇多糖口服液是否有缓解小鼠体力疲劳的功能．方法：通过热水抽提、乙醇沉淀等方法制备香菇多糖,用18％橙汁、4％砂糖、0．2％柠檬酸、0．15％稳定剂CMC溶剂配制不同计量口服液,给小鼠灌胃,对照组为生理盐水．30d后比较各组小鼠体质量、负重游泳时间、血清尿素氮、血乳酸浓度及肝糖原水平的变化．结果：与对照组相比,2．25r,／kgBW剂量组香菇多糖口服液能显著延长小鼠的负重游泳时间（P〈0．01）,增加肝糖原的储备量（P〈0．01）,降低血乳酸水平（P〈0．01）,降低运动后血清尿素氮的增量（P〈0．05）,1．13g／kgBW剂量组香菇多糖口服液能延长小鼠的负重游泳时间（P〈0．05）,降低血乳酸水平（P〈0．05）,降低运动后血尿素氮的增量（P〈0．05）,结论：香菇多糖口服液具有抗疲劳生理活性．     

野木瓜皂甙对HL60肿瘤细胞增殖的影响

研究野木瓜皂甙（Stauntoniae Saponin，SS）提取物对人类白血病细胞系HL60增殖的影响，为中草药抗肿瘤提供实验依据．以不同浓度SS作用于HL60细胞，然后用MTT比色法测定它对HL602细胞增殖的影响．当浓度为18mg／L时，SS能明显地促进HL60细胞的增殖（P〈0．01）；浓度大于90mg／L时，SS对HL60细胞增殖产生抑制作用；当浓度为2253mg／L时，抑制率高达63．15％（P〈0．01）．浓度大于18mg／L后，细胞增殖的抑制率与SS浓度呈线性相关，r=0．8928（P〈0．001）；SS的LC50为1652mg／L．野木瓜皂甙提取物对HL60细胞的增殖有明显的双向调节作用，即在较小范围的低浓度区域内有促进HL60细胞增殖的作用，浓度增大后则改变为抑制作用；浓度越大，抑制作用越强．     

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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