双咖酚酸在小鼠体内的药物代谢动力学与组织分布

通过建立一种以咖啡酸为内标的HPLC方法以检测小鼠各组织中双咖酚酸的浓度,研究双咖酚酸在小鼠体内的药代动力学特征及组织分布状况.将健康小鼠按25 mg·kg-1的剂量腹腔注射给药后,收集不同时间点的含药血浆及心、肝、脾、肺、肾,检测双咖酚酸在各组织中的分布,并利用DAS2.1.1软件拟合房室模型,计算药动学参数.实验结...     

龙血素B在模拟失重效应大鼠体内的分布研究

研究传统名贵傣药龙血竭中有效成分龙血素B在大鼠体内重要组织的分布情况,同时探讨长期模拟失重效应对龙血素B分布的潜在影响.将SD大鼠分为正常重力组和模拟失重效应组,采用21 d大鼠尾悬吊方法模拟长期失重效应,单次灌胃给予大鼠25 mg/kg龙血素B,于给药1 h后收集心、肝、脾、肺、肾、胃、肠、脑、睾丸和骨骼肌10种组织,采用HPLC-MS/MS方法测定各组织中龙血素B质量分数.在正常重力组中,龙血素B在肝、胃分布较多,其次是肾、肠、心、脾、骨骼肌和肺,脑中最少.与正常重力组相比,模拟失重效应组大鼠肝中龙血素B的质量分数显著升高47.7%（p<0.05）,脑中质量分数上升5.4倍（p<0.05）;在肠和肾中质量分数显著下降52.7%和22.0%（p<0.05）;在大鼠胃、心、肺、脾、睾丸和骨骼肌中质量分数无显著变化.龙血素B的分布具有明显组织特异性,长期模拟失重效应显著改变龙血素B在大鼠肝、肠、脑、肾等重要组织的分布.      

新藤黄酸纳米囊的肝靶向研究

目的：研究新藤黄酸纳米囊（NGA-NC）在小鼠体内的肝靶向性.方法：HPLC法测定NGA-NC试验组与新藤黄酸（NGA）对照组小鼠心、肝、脾、肺、肾及血浆中NGA的含量,比较两组小鼠体内药物分布特点,进行靶向评价.结果：NGA-NC试验组与NGA对照组比较,在肝脏的分布差异有显著性,NGA-NC组能显著增加NGA在肝脏的分布.结论：NGA-NC能增加NGA的肝靶向性.     

几种新型毒品在急性中毒大鼠体内死后再分布情况的探索

目的探索K粉和摇头丸合并滥用后,亚甲基二氧甲基苯丙胺(MDMA)和氯胺酮在急性中毒大鼠体内的死后再分布特点。方法大鼠48只,随机分成4组,分别为A组(氯胺酮组)、B组(MDMA组)、C组(多药滥用组)、D组(对照组),每组12只,A和B组按120 mg·kg-1剂量灌胃,C组按A和B组剂量灌胃,24 h后处死,于死后不同时间(0 h、4 h、12 h、24 h、48 h)取心血、心肌、肝、肾、脾、肺,用固相微萃取法提取后,采用高效液相色谱质谱联用法检测其中MDMA和氯胺酮的含量。同时,D组灌胃生理盐水进行对照。结果氯胺酮和MDMA在大鼠死后存在死后再分布现象。死后0 h,A组和C组各组织氯胺酮的浓度分布基本一致,依次为:肾、肝、脾、心肌、肺、心血(C组的肝浓度稍高于肾浓度)。死后0 h,B组和C组各组织MDMA的浓度分布基本一致,依次为:肝、脾、肺、心血、心肌、肾(C组的肾浓度稍高于心肌浓度)。随着死后时间的延长,A组、B组和C组的大鼠各组织均呈现一定的变化。结论本实验得出的氯胺酮和MDMA以及两者混合滥用的大鼠死后再分布规律可以作为毒品滥用研究的参考。     

不同浓度二硫苏糖醇对急性运动小鼠心、肝和肾组织脂质过氧化水平的影响

探讨了不同浓度二硫苏糖醇（DTT）对急性运动小鼠心、肝、肾组织脂质过氧化水平的影响。108只昆明种系雄性小鼠随机分为安静对照组（A）、运动对照组（B）、运动加五种不同浓度DTT组（分别为C、D、E、F、G）建立急性游泳训练模型。结果表明，运动后即刻，随着DTT浓度的升高，心和肾组织中MDA含量呈现出先上升后下降的趋势。肝组织中呈现出先上升后下降又突然增高的趋势。但运动后即刻F组心、肝、肾组织中MDA含量均低于A、B组。24h恢复后，随着DTT浓度的升高，心、肝、肾组织中MDA含量都呈现出先下降后上升的趋势。不同浓度DTT均具有抗脂质过氧化作用，但不同浓度DTT对不同组织在不同时期的脂质过氧化水平影响不同。     

铁皮石斛改善记忆能力及延缓衰老的初步研究

目的:考察铁皮石斛改善记忆功能及整体衰老状态的作用.方法:给药10周后,通过迷宫实验及跳台实验,观察铁皮石斛榨汁液(体积分数为1 g·kg-1)、多糖(体积分数为0.32 g·kg-1)对初老小鼠记忆功能的改善作用;HE染色观察心、肝、肾、肺、脑等组织病理学变化;检测血清超氧化物歧化酶(SOD)水平及丙二醛(MDA)含量.结果:铁皮石斛榨汁液及多糖能明显减少初老小鼠走出迷宫的时间(P0.05);延长跳台实验中的潜伏期,减少错误次数(P0.05);对肝、肾、肺等重要脏器衰老病变均有不同程度的改善作用(P0.05);增加SOD水平并降低MDA含量.结论:铁皮石斛具有辅助改善小鼠记忆及延缓重要脏器衰老病变的功能,从整体上改善衰老的状态.     

模拟大气污染暴露对小鼠多组织急性损伤及肺组织的氧化应激效应

采用自主研发的气动雾化法装置,模拟自主呼吸条件下暴露于污染大气环境的真实状况,探讨大气可吸入颗粒物(空气动力学直径≤10μm)不同暴露时间对小鼠肺、脑、心、肝、肾、睾丸等靶器官组织损伤程度及可吸入颗粒物暴露导致小鼠的氧化应激效应.结果显示,可吸入颗粒物经气动雾化法暴露后导致小鼠肺、肾、肝、心等多组织发生病理性损伤,诱导肺组织发生明显的氧化应激,肺组织可作为可吸入颗粒物毒性机制研究的靶标组织.     

HBs和HCVc基因双顺反子质粒在BALB/c小鼠体内的分布

 采用注射含双顺反子质粒后,PCR法扩增不同组织中HBsAg和HCVc基因,同时检测HBV和HCV抗体应答水平.研究注射基因免疫用双顺反子质粒在小鼠组织中的分布.pcDNA3.0BApc154S₂S 1次注射BALB/c小鼠后,24 h内主要分布于血液、肝、脾、骨髓、淋巴结、注射部位肌肉、肺和肾等含血液丰富的组织中.注射后2 d主要在骨髓、血液和注射部位肌肉中存在.7 d后仅在注射部位肌肉中能检测出来,并可持续到第9周.组织切片镜检质粒注射初期肌肉细胞轻度浊肿,随后肌膜细胞轻度增生,未见其它明显的组织病理学变化.质粒多次免疫BALB/c小鼠未见明显的临床症状和病理组织学变化.质粒在小鼠体内不同组织存在时间不一致.     

碳酸二甲酯腹腔注射染毒小鼠急性毒性实验研究

研究碳酸二甲酯腹腔注射染毒对小鼠急性毒性的影响.小鼠腹腔注射给予3707.40、4521.22、5513.68、6724.00、8200.00 mg/kg碳酸二甲酯,给药后记录小鼠进食量、体重、心电图,计算半数致死量(LD50).实验结束后,检测血液学、血液cTnI和生化指标,计算脑、心、肝、脾、肺、肾、卵巢、睾丸、附...     

H~3-藻酸双酯钠的药物动力学研究

研究了不同剂量~3H-藻酸双酯钠(PSS)在小鼠及大鼠体内的吸收、分布,排泄及药物代谢动力学参数.无论口服或静注小鼠组织分布较广,12h 以肝、肾最高,脑,脂肪、骨骼较低,大脑、小脑、脑干放射性分布未见明显差异.静注72h 自小鼠尿排泄60%,粪排泄20%.大鼠口服24h 由胆汁排泄15.3%.小鼠及人血血浆蛋白结合率24h 为98%.PSS 0.8%CMC 混悬液口服的绝对生物利用度为75.6%,具有吸收好,分布广,排泄快等特点.     

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