变系数 mKdV 方程的精确解

利用李群方法研究以时间为变系数的 mKdV 方程,找到了变系数方程的李代数、优化系统、相似约化、精确解.通过优化系统得到变系数 mKdV 方程的精确解.另外,借助假设的孤立波方法得到了变系数的 mKdV 方程的一个精确孤立子解     

再生骨料混凝土在新疆地区的效益分析

本文总结国内外建筑垃圾处理现状和再生骨料的应用情况;结合新疆地区的实际情况,采用对比的方法,分析新疆地区普通混凝土和再生骨料混凝土的生产成本。研究得出再生骨料混凝土具有很好的经济效益、社会效益、环保效益以及很好的市场应用前景。     

新型薁并[1,2-f]苯并[1,4]二氮卓类衍生物的合成与表征

以1-甲酰基-2-甲氧基薁-3-甲酸甲酯为反应底物,通过与邻苯二胺缩合、烷基化、脱羧等过程,成功地制备了新型薁并[1,2-f]苯并[1,4]二氮卓类衍生物.反应收率良好、操作简单、条件温和.产物结构通过红外光谱、核磁共振谱、质谱及元素分析证实.     

1,2-二甲基-3-丁基咪唑硫酸氢盐离子液体的合成及其性质研究

介绍了在室温下设计合成的一种功能化离子液体1,2-二甲基-3-丁基咪唑硫酸氢盐离子液体[mmBim][HSO4]均为在不同温度下测定了该离子液体的密度、表面张力、粘度和电导率等性质,并根据特定的经验方程,估算了该离子液体的热膨胀系数、标准熵和晶格能等性质参数,为该离子液体的预期应用提供了重要的数据参考.     

Arthropod trace fossils from the Zhujiaqing Formation (Meishucunian, Yunnan) and their palaeobiological implications

1　Biostratigraphicbackgroundandgeologi calsettingIneasternYunnan ,thesupra tointertidaldolomitesoftheXiaowaitoushanMember (Upper mostDengyingFormation =LatestSinian)areun conformablyoverlainbythesubsequent (earliestCambrian) phosphoritesoftheZhujiaqingFormation(MeishucunianStage) .TheoutcropsnearMeishucuninJinningCounty ,southwestofKunmingrepresentsakeysectionforthePC/CtransitionontheYangtzeplatform[1] .TheZhujiaqingFormationbelongstotheEarlytoMiddleMeishucunian (=Nemakit DaldynSt…     

白蔡芦醇诱导HepG2细胞凋亡中线粒体差异蛋白鉴定

文中分离提取白慕芦醇处理的HepG2细胞线粒体蛋白质,以未处理HepG2细胞为对照,利用双向电泳技术分离差异蛋白,飞行时间质谱分析鉴定差异蛋白点初步分析鉴定了4个显著性差异蛋白,其中驱动蛋白和着丝粒相关蛋白(:ENP-E在白慕芦醇处理的HepG2细胞中表达降低,证明白慕芦醇对细胞周期有调节作用;线粒体加工肤酶表达降低,线粒体核糖体蛋白L7/L12表达升高,说明白慕芦醇诱导HepG2细胞凋亡与其影响线粒体功能有关     

A novel method for ionizing radiation-induced RNA damage detection by poly（A）-tailing RT-PCR

Ionizing radiation (IR) causes severe cellular damage both directly and indirectly and disrupts RNA integrity. RNA strand breaks are the most frequent type of damage caused by IR. RNA damage is involved in the development of degenerative diseases, including Alzheimer’s disease and Parkinson’s disease. However, the mechanism of mRNA damage and any resulting pathophysiological outcomes are poorly understood. This is partly because there is a lack of sensitive tools to monitor damage randomly occurring in RNA,...     

Observation and hydrodynamic analysis of fast-start of yellow catfish (Pelteobagrus fulvidraco)

Afast startisahigh energyswimmingburststartingeitherfromrestorfromsteadyswimming[1] .Thefast startsareclassifiedintotwomaintypes ,C startandS start ,inwhichthefishbodyisbentintoa‘C’or‘S’shapeattheendofthefirstcontractionofthelateralmusculature .Fast startsareimportantformostfishinescapingpredatorsandachieving preycapture .Afast startprocesshastwoamazingcharac teristics.Oneistheturningmaneuver .Theturningmaneuveriscarriedoutveryrapidly ,withtheturningdiameterbeingequalto ,orevenlessthanth…     

Molecular phylogeny of coronaviruses including human SARS-CoV

The outbreak of SARS sets an urgent task to reveal the origin of human SARS-CoV, i.e. its relation to other known species of coronavirus, and to trace the genetic variation in the spreading process of SARS. Partial answer to the problem may be obtained from phylogenetic analy-sis of available genomes. We call a phylogenetic tree of different species of coronavirus including the human SARS-Cov a CoV Tree and that of different isolates of SARS-CoV a SARS Tree. CoV trees have been c…     

Involvement of Jasmonate-signaling pathway in the herbivore-induced rice plant defense

The expression patterns of eight defense- related genes in the herbivore-infested and jasmonate- treated (jasmonic acid, JA and its derivative MeJA) rice leaves were analyzed using RT-PCR. The results showed that Spodoptera litura Fabricius (Lepidoptera: Noctuidae) herbi-vory induced the expression of lipoxygenase (LOX) and al-lene oxide synthase (AOS) genes that are involved in the jasmonate-signaling pathway. Moreover, S. litura damage resulted in the expression of farnesyl pyrophosphate syn-thase (FPS), Bowman-birk proteinase inhibitor (BBPI), phenylalanine ammonia-lyase (PAL) and other rice defense- related genes that were also induced by aqueous JA treat-ment or gaseous MeJA treatment. These indicated that in rice leaves, the JA-related signaling pathway was involved in the S. litura-induced chemical defense. Mechanical damage and brown planthopper (BPH), Nilaparvata lugens (St錶) (Homoptera: Delphacidae) damage induced the expression of LOX gene, but both treatments did not induce the expression of AOS gene. However, BPH damage induced the expression of acidic pathogen-related protein 1 (PR-1a), Chitinase (PR-3), and PAL genes, which is involved in the salicylate- signaling pathway. It was suggested that salicylate-related signaling pathway or other pathways, rather than jas-monate-signaling pathway was involved in the BPH-induced rice plant defense.