葛花对大鼠酒精性肝损伤的预防作用研究

通过每日予大鼠白酒灌胃方法复制大鼠酒精性肝损伤模型,观察中药葛花对大鼠酒精性肝损伤的预防作用。110只雄性Wistar大鼠随机分为6组:空白组、模型组、葛花醇提物低剂量组、葛花醇提物中剂量组、葛花醇提物高剂量组和阳性对照药东宝甘泰片组。在造模的同时灌胃葛花醇提物及东宝甘泰片水溶液。连续灌胃8周,8周末取材观察:血清谷丙转氨酶(ALT)、谷草转氨酶(AST)、碱性磷酸酶(ALP)活性,总蛋白(TP)及白蛋白(ALB)含量;肝组织超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量、还原型谷胱甘肽(GSH)含量;肝组织病理变化。结果显示,模型组大鼠出现肝组织脂肪变性和炎性浸润,血清ALT、AST、ALP活性较空白组显著增加,TP、ALB含量较空白组显著降低;且肝组织中SOD活性显著降低,MDA含量显著升高。葛花醇提物组大鼠的肝组织脂肪变性和炎性浸润均较模型组有所减轻,血清ALT、AST活性较模型组显著降低,TP、ALB含量较模型组显著升高,肝组织SOD活性较模型组显著升高,MDA含量显著低于模型组,GSH含量较模型组也明显升高。研究表明,葛花醇提物具有明显预防酒精性肝损伤的作用。     

月季花色素对运动小鼠抗氧化酶系统及乳酸含量的影响

研究月季花色素(rose anthocyanin,RA)对小鼠运动能力和抗氧化能力的影响,探讨其抗运动性疲劳的机制.选取32只昆明种小鼠随机分为对照组(control group,C)、补充月季花色素组(rose anthocyanin group,R,按0.01 mL/g补充月季花色素),每组16只.4周后,每组8只力竭运动,记录游泳至力竭的时间;每组另8只进行定量负荷(负3%体重)后测定小鼠血清和骨骼肌中MDA、血乳酸含量与SOD,GSH-PX,CAT及小鼠骨骼肌中LDH活性.结果表明:1)补充月季花色素可显著延长小鼠运动至力竭时间(P<0.05),降低小鼠血清和骨骼肌中血乳酸含量(P<0.05),并提高小鼠骨骼肌中LDH活性(P<0.05);2)R组小鼠血清和骨骼肌中MDA含量显著降低(P<0.05),SOD,GSH-PX,CAT活性显著提高(P<0.05).由此可知,月季花色素可显著增强小鼠体内多种抗氧化酶的活性,延迟运动性疲劳的产生,提高运动能力.     

全氟辛酸在小鼠肝脂质过氧化损伤中的作用

确定全氟辛酸是否通过脂质过氧化造成小鼠肝脏的损伤.将小鼠随机分为4组,分别为空白组、1/16LD50、1/8LD50和1/4LD50组,染毒14 d后采用HE染色法观察肝脏病理变化,试剂盒法测定肝组织匀浆中超氧化物歧化酶(SOD);还原型谷胱甘肽(GSH);丙二醛(MDA)、血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、碱性磷酸酶(ALP)含量变化.HE染色观察到全氟辛酸染毒组肝组织损伤明显;试剂盒结果显示,与空白组相比,全氟辛酸组小鼠组织匀浆中SOD活性显著降低,MDA含量显著升高,GSH活性显著降低,均有统计学意义.全氟辛酸组小鼠血清中ALT和AST活性明显高于空白组(P<0.01),低剂量组小鼠血清ALP活性与空白组相比显著升高(P<0.05),高、中剂量组与空白组相比ALP活性有升高趋势,但是没有统计学意义.全氟辛酸通过脂质过氧化造成小鼠肝损伤.     

野生山葡萄皮渣多酚类物质对老龄大鼠脑脂褐素的影响

目的 研究野生山葡萄皮渣总多酚(PVAS)的抗衰老作用．方法 PVAS按每d200mg/kg，400mg/kg给老路大鼠连续灌胃30d，到血清MDA含量、SOD活性和脑组织脂褐素含量．结果 PVA(每d200mg／kg，400mg／kg，共30d)组均能显著降低老龄大鼠血清MDA和脑组织脂褐素含量(P＜0．05)．PVA(400mg／kg)能明显提高老龄大鼠血清SOD活性（P＜0．05)．结论 PVA能有效地改善自由基代谢，具有抗衰老作用．     

蕨菜黄酮对注射四氧嘧啶大鼠的MDA和SOD的影响

目的:研究蕨菜黄酮对注射四氧嘧啶大鼠肝脏中丙二醛(MDA)含量、超氧化物歧化酶(SOD)活性以及血清中SOD活性的影响。方法:用一定浓度四氧嘧啶分两次腹腔注射大鼠,然后将大鼠分成三组:四氧嘧啶组;低剂量组,每天灌胃100mg.kg蕨菜黄酮;高剂量组,每天灌胃300mg.kg的蕨菜黄酮。采用硫代巴比妥酸法(TBA法)测定大鼠肝组织中丙二醛(MDA)的相对含量以及改良的邻苯三酚自氧化法测定大鼠肝组织和血清中SOD活性。结果:蕨菜黄酮能显著降低注射四氧嘧啶后大鼠肝脏中MDA含量(P<0.05),但对肝组织中SOD活性影响不显著;高剂量组血清中SOD活性相对四氧嘧啶组显著降低(P<0.05),达到空白对照组水平。结论:饲喂蕨菜黄酮对改善机体代谢的合成,促进肝组织细胞的正常生长,具有显著清除体内氧自由基,增强机体抗氧化功能,提示有延缓衰老的保健作用。     

海洋胶原肽对SD大鼠生存时间的影响

为探讨海洋胶原肽长期喂养对SD大鼠生存时间的影响,选用4周龄SD大鼠160只,随机分为空白对照组和3个剂量的MCP干预组,每组40只,雌雄各半.对照组和3个剂量的MCP干预组的大鼠分别给予普通标准饲料和在对照组饲料的基础上分别添加2.25%、4.5%和9%的MCP干预组饲料至自然衰老死亡.实验过程中记录大鼠的体重、摄食量、食物利用率,每6月对大鼠血清的抗氯化相关指标超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-PX)活性及丙二醛(MDA)水平进行检测.生存分析结果表明,3个剂量的MCP干预组的中位生存时间,尤其是最后30%存活动物的生存时间均显著长于对照组;在干预18和24月时,4.5%和9%MCP干预组的血清SOD酶和GSH-PX的活性在雌雄大鼠均显著高于对照组,而MDA的水平则显著低于对照组.本研究表明,一定剂量的MCP长期干预可对大鼠生存时间有一定的延长作用,而MCP对SD大鼠衰老过程中机体抗氧化能力的提高作用可能是其中机制之一.     

氧自由基与妇科肿瘤关系的研究

目的探讨超氧化物歧化酶(SOD)、丙二醛(MDA)、一氧化氮(NO)、谷胱甘肽(GSH-PX)与妇科常见肿瘤的关系.方法1)以20例正常健康人为对照组,子宫肌瘤30例、子宫颈癌20例、卵巢癌22例,分别用生物化学法测定血清中SOD,GSH-PX活性与MDA,NO的含量.2)以子宫肌瘤30例、子宫颈癌20例、卵巢癌22例,分别用生物化学法测定癌组织与癌旁组织、子宫肌瘤核组织与核旁组织中SOD,GSH-PX活性和MDA,NO含量.结果1)血清测定中,肿瘤患者的MDA含量、SOD活性比正常对照组高;GSH-PX活性比正常对照组低;良性肿瘤的NO含量高于正常对照组,恶性肿瘤中的NO含量低于正常组.2)组织测定中,肿瘤组织MDA含量,SOD,GSH-PX活性比肿瘤旁组织高,癌组织中NO含量比肿瘤旁组织低.结论子宫颈癌、卵巢癌、子宫肌瘤组织及血清中有明显的自由基代谢紊乱,而且良恶性肿瘤有明显差异,并且随着肿瘤恶化程度的变化,自由基也呈现规律性变化.     

葛根素对运动大鼠血清自由基代谢及运动能力的影响

通过建立竭力游泳训练模型,测试大鼠血清SOD、GSH-Px、GSH、T-AOC、MDA含量,探讨葛根素对运动训练大鼠血清自由基代谢及运动能力的影响.研究结果表明,安静时葛根素组大鼠血清SOD、T-AOC高于对照组,而MDA含量低于对照组(P<0.05);运动后即刻和恢复24 h葛根素组大鼠血清SOD、GSH-Px活性、T-AOC显著高于相应对照组(P<0.05),而MDA含量明显低于相应对照组(P<0.05);且葛根素组游泳时间较对照组有显著延长(P<0.05).葛根素可显著提高运动大鼠抗自由基氧化的功能,使小鼠运动能力有了明显提高.     

天麻多糖对亚急性衰老模型小鼠自由基代谢的影响

研究天麻多糖对衰老小鼠自由基代谢的影响。分别测定小鼠血清、肝、脑、心组织中的超氧化物歧化酶 (SOD)、过氧化氢酶 (CAT)、谷胱甘肽过氧化物酶 (GSH-Px)活力和丙二醛(MDA)含量。结果表明:与模型组小鼠相比,天麻多糖大剂量组可显著提高衰老小鼠血清、肝、脑、心组织中SOD和CAT活性(P<0. 01),明显抑制衰老小鼠血清、肝、脑、心组织中MDA的形成,可显著提高衰老小鼠血清中GSH-Px的活性。说明天麻多糖具有较好的清除自由基,降低MDA的含量,延缓细胞衰老的作用。     

富含SOD苹果对小白鼠抗疲劳与耐缺氧能力的影响

研究了富含SOD苹果对D-半乳糖所致衰老小白鼠体内活性氧防御能力及抗疲劳、耐缺氧能力的影响.结果表明,饲喂富含SOD苹果可显著提高小白鼠血清和肝组织的SOD、CAT和GSH-PX活性,抑制脂质过氧化作用,降低MDA含量.从而使小白鼠的抗疲劳、耐缺氧能力明显增强.     

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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