简介:Huanghe河三角洲是世界的大河之一,自从最后,Huanghe河里的Huanghe河三角洲paleoenvironmental进化是一个热问题冰川。基于联合AMS14核心DYZK1沉积标明日期在的C在亚底部侧面上Huanghe河三角洲和声学的顺序沉没了,phytolith分析在96件沉积样品上被执行。谷物尺寸参数,磁性的危险性与biostratum的垂直变化被相结合重建在Huanghe河三角洲的paleo沉积、气候的条件。在索引参数有一条重要垂直变化法律的学习结果表演,和Huanghe河三角洲的那沉积环境经历了河的facies-sealand转变的进化进程外形潮汐的完全外形浅海的faciesdelta外形自从26.0kaB。P...phytolith分析结果如下。第一,phytoliths被划分成矛尖状,光滑伸长,多刺伸长,一种特殊格律,长矩形,bulliform和其它类型。在不同sedimental环境,phytolith内容定期变化,显示phytolith在沉积环境有的一样装配稳定性的某个度。第二,矛尖状,phytoliths的光滑伸长和多刺伸长范畴在潮汐的扁平的外形和三角洲免职有更大的内容,当时一在浅海的外形的更小的内容和河的外形环境。通过变化系数的比较分析,第三,在沉积的主要phytolith范畴的内容在sealand转变外形和河的外形免职有一个更大的变化振幅,当在tidalflat外形和三角洲外形免职是更稳定的时。
简介:腐蚀抵抗无电在钠氯化物答案从12%~14%与磷的内容捏存款被学习。存款沉浸于3.5%NaCl答案让29d获得电气化学的参数;分别地为15d在标准盐水花测试被检验。存款的腐蚀抵抗被potentio动态的扫描学习,电气化学的阻抗光谱学(EIS),X光检查衍射(XRD);扫描电子显微镜学(FE-SEM)的冷地的排放与一个精力装备了散X光检查察觉者(EDX)。XRD的模式;FE-SEM的结果证明准备存款是非结晶的。但是在15d标准盐水花测试以后,一些针孔出现在存款的表面上;存款的表面上的磷的重量内容更高(它对钝化电影的形成有益)当因为镍的溶解重量比磷的大,镍内容更低时,比那,在标准盐前,水花测试。从potentio动态的扫描的结果;EIS证明钝化电影在NaCl答案在沉浸以后在Ni-P存款上形成了,它减少了腐蚀率捏样品。这个工作的结果在海洋的腐蚀显示出他们的潜在的应用。
简介:CytochromeP450(CYP)superfamilyisoneofthemembershiplargestandfunctionmostdiverseproteinsuperfamilyrecogniozedamonglivingbeings.Membersofthissuperfamilywerefurtherassignedtodifferentfamiliesandsubfamiliesbasedontheiraminoacidsimilarities.Accordingtotheirphylogeneticrelationships,theCYPgeneswhichlikelydivergedfromcommonancestorgeneandmaysharecommonfunctionsweregroupedintooneclan.Widelydistributingscallopsareagroupofthemostconspicuousbivalve;howeverthestudiesontheirCYPisacarce.Inthisstudy,wesearchedthegenomeandexpressedsequencetagsofZhikongscallop(Chlamysfarreri)forCYPgenes.Intotal,88non-redundantCYPwereidentified,whichwerehomedin13CYPsgenefamilies.Phylogeneticanalysisdividedthesegenesinto4CYPclans.Asindeuterostomes,Clan2wasthelargest,whichcontained33genesbelongingtoCYP1,CYP2,CYP17andCYP356families.Clan3contgained19genesbelongingtoCYP3,CYP5andCYP30families.Clan4contained23genes,allbelongingtoCYP4family.ThemitochondrialCYPclancontained9genesbelongingtoCYP10andCYP24families.Incomparison,protostomes(C.farreri,D.pluex,D.melanogaster)containedmoreCYPgenesthandeuterostomes(S.purpuratusandvertebrates)inClan2butlessgenesinClan3andClan4.OurfindingswillaidtodecipheringCYPfunctionandevolutioninscallopsandbivalves.
简介:WeusedearthquakecatalogsrecordedbyGuangdongSeismologicalNetworkfrom2008to2014toresolvethespatialvariationsofb-valuesinthecoastalareaofGuangdong,particularlyinthreekeyresearchareas(Yangjiang,Heyuan,andoffshoreNanaoIsland)withstrongseismicity.Ourresultsrevealedthatb-valuesexhibitedsignificantspatialvariations,andzoneswithlowb-valuescouldindicatethemostlikelyseismogenicareaoflargeearthquakes.Weobservedthreeclearlowb-valuepatchesintheoffshoreNanaoIsland.Wefoundadistincthighb-valuepeakatthedepthof11kmandtwominimumpeaksatabout14and7–8kmintheYangjiangarea.Theoverallb-valuesgenerallydecreasewithdepthintheHeyuanarea.Thespatialvariationsofb-valuesreflecttectonicanomalies;thatis,the‘low-high-low’distributionofb-valuesintheoffshoreNanaoIslandandtheYangjiangareamayindicatetheanomalyofthecrustalstructurewithaweaklayer.Theb-valuesofreservoir-inducedseismicityareobviouslylowerthanthatinducedbytectonism.Thisfindingindicatesthatthereservoirareaisgenerallyathighstressstateundertheconditionofhighporepressure.Weinferredthatlargeearthquakesmightbepronetooccurat10–12kmdepthintheoffshoreNanaoIsland,at12–15kmdepthintheYangjiangarea,andatthelowerpartoftheseismicactivityzoneintheHeyuanarea.Moreover,theupstreamareaoftheXinfengjiangreservoiristhemostlikelyareaoffuturelargeearthquakesintheHeyuanarea.
简介:SequencevariationofpartialcytochromebgenesbetweentwoCoiliaspecies,C.ectenesandC.mystus,wasinvestigated.Ofthe402nucleotides,twenty-seven(6.72%)arepolymorphicandallaresynonymoussubstitutions.Atthethirdpositionsofgeneticcondonofcytochromebgene,thetwospeciesshowanextremeanti-Gbias(<4%)andapronouncedbiastowardsAandC(>68%).Thereisnoaminoacidsequencedivergencebetweenthepartialcytochromebgenesofthetwospecies,indicatingaclosegeneticrelationshipbetweenthem.Thek-2pgeneticdistanceofpartialcytochromebsegmentofthetwospeciesis0.072,suggestingthatthespecieswereseparated3.6Maago,inthemiddlePliocene.Ourresultrevealsthatthecytochromebgeneisanappropriatemarkerforstudiesofpopulationgeneticstructuresandphylogeographicpatternsofthetwospecies.
简介:Effectsofthemixtureofβ-ecdysoneandpolypodine-B(2:1W/W)onthemoultingandgrowthofprawn,Penaeusorientalisswerestudiedinlaboratorybyrearingtheanimalwiththeaddedcompounddiets.Theresultsshowedthattheadditionofthemoultinghormone(M.H)mixturetocompounddiets,from1.33×10-6to30×10-6,couldincreasemoultingactivityandgrowthrateoftheprawntodifferentextents,amongwhichthe5.33×10-6-10.67×10-6additionhadstatisticallysignificanteffects.However,60×10-6addeddietscausedmoultingandgrowthinhibitionsandcuticlethickening.Theanalysesofprotein,waterandashcontentsoftheprawnshowednoremarkabledifferencesbetweenhormonedosedanimalsandthecontrol.
简介:Comparedtotowedstreamers,ocean-bottomseismometers(OBS)obtainbothS-wavedataandricherwavefieldinformation.Inthispaper,theinducedpolarizationmethodisusedtoconductwavefieldseparationonOBSdataobtainedfromtheShenhuareaintheSouthChinaSea.AcomparisonofthechangesinP-andS-waves,andacomprehensiveanalysisofgeologicalfactorswithinthearea,enableanalysisanddescriptionoftheoccurrenceofnaturalgashydrateinthestudyarea.ResultsshowanincreaseinP-wavevelocitywhennaturalgashydrateexistsintheformation,whereastheS-wavevelocityremainsalmostconstant,asS-wavescanonlypropagatethroughtherockskeleton.Therefore,thebottom-simulatingreflection(BSR)responseoftheP-waveisbetterthanthatoftheS-waveinthefrequencyanalysisprofile.Inawide-anglesection,therefractivewaveofthehydratelayerisevidentwhenusingP-wavecomponentsbutidentificationisdifficultwithS-wavecomponents.ThisvelocitymodelillustratesthesensitivityofPandS-wavecomponentstogashydrate.TheuseofthispolarizationmethodandresultsofanalysisprovidetechnicalandtheoreticalsupportforresearchonhydratedepositsandothergeologicalfeaturesintheShenhuarea.
简介:HepatitisBvirus(HBV)isasignificantglobalpathogenandefficientcureforHBVpatientsisstillachallenginggoal.Wepreviouslyreportedthatacidicmucopolysaccharidefromstichopusjaponicusselenka(SJAMP)couldinhibitHBsAgandHBeAgexpressioninvitro.However,thepotentialanti-HBVeffectsofSJAMPinvivohavenotyetbeenexplored.Inthisstudy,weshowthatSJAMPexhibitspotentanti-HBVactivityinHBVtransgenicmiceinadose-dependentmanner.Specifically,sixtyHBVtransgenicmaleBALB/cmicewererandomlyselectedtoreceivethetreatmentofPBS,lowdoseSJAMP(30mgkg-1),middledoseSJAMP(40mgkg-1),highdoseSJAMP(50mgkg-1)andIFN(45IUkg-1)for30d.SJAMPtreatmentsuppressedserumHBV-DNA,andliverHBsAgandHBcAglevelsinHBV-transgenicmice.ThepresentstudyhighlightsthepotentialapplicationofSJAMPinHBVtherapy.
简介:珊焊是一个sensitive-to-environment建筑群水兵生态系统。珊瑚的Theecosystem富于生物多样性。遥感为分类珊焊提供一个强大的工具并且是大多数费用-有效途径为大-规模礁石调查。DongshaAtoll,有10m的平均深度的超过300km~2,在华南海的北大陆人边缘被定位。它被在最近的十年期间的破坏钓鱼滥用了。三卫星形象(Quickbird2,ETM+和SPOT5)被用来评估能力ofSPOT5形象提供为在那里分类珊焊的当前的分发是有用的数据。在处理的数据期间,无指导的分类功能为ETM+和SPOT5数据被采用,当监督分类方法被用于Quickbird2时。班是()合并了进珊焊,然后将被vectorization,简化,和拓扑的分析操作。有比有3x3pixels在的察觉限制的100m大的1331珊焊多-Quickbird2的乐队数据,它作为比较基线被拿。从SPOT5和ETM图象提取的Theresults比从theQuickbird2图象的那些是在数字和区域的更少,而从SPOT5数据的结果由于它的更高的分辨率比在淤泥的泻湖的ETM数据的那些好。因为它的差的穿入能力,SPOT5x乐队2没能与ETM数据相比在环礁内区分深底层。仅仅看到x乐队1cannot被用来把珊焊区分开来与沙底部。多合并SPOT5-有SPOT5平底锅的空间分辨率的乐队数据-数据并且指ETM形象被期望提供一颗最佳的卫星-为珊焊印射的基于的途径。
简介:Thegrowth,biochemicalcontentandbioaccumulationquantityof2,2’,4,4’-tetrabromodiphenylether(BDE-47)inSkeletonemacostatumwerestudiedunderdifferentN:Pratios(1,4,16,64and128).AllcellularbiochemicalcontentsofS.costatumpresenteddecreasingtrendovercultivationtime.Atearlystageofcultivation,thecellularprotein,carbohydrateandlipidinS.costatumpresentedhighervaluesintreatmentsofN:P=4and16.However,theywerelowerinthesetreatmentsatthelatestage,buthigherintreatmentsN:P=1and128.Similarly,BDE-47levelspercellofS.costatumwerehigherintreatmentsofN:P=4and16atearlystageofcultivation,whichwere3.8and3.7ng(106cells)-1,respectively.Atthemiddlestageofcultivation,theBDE-47levelperS.costatumcelllowered;anditfurtherreducedinthetreatmentsofN:P=4and16atthelatestagewiththevalues0.6and0.5ng(106cells)-1,respectively.However,itroseinN:P=128,reachingupto2.3ng(106cells)-1.ComparedwithBDE-47percell,BDE-47peralgalvolumeunderdifferentN:Pratiosdidnotpresentobviousdifference.ThequantityBDE-47accumulatedpercellofS.costatumwaspositivelycorrelatedwithprotein,carbohydrateandlipidpercell;meanwhile,theBDE-47pervolumehadapositivecorrelationwithbiochemicalcontentpervolume.ThevariationofbioaccumulationabilityofBDE-47inS.costatumcanbeexplainedbybiochemicalchangesduetoN:Pratios.
简介:参予联合模型Intercomparison工程的十七个模型分阶段执行5(CMIP5)活动在他们华南海(SCS)海洋热内容(OHC)的历史的模拟上被比较在上面300m。Ishiis温度数据,基于世界海洋数据库2005(WOD05)并且世界海洋地图集2005(WOA05),被用来由比较季节的OHC的空间模式估计模型表演异例(OHCa)气候学,OHC气候学,每月的OHCa气候学,并且OHCa的interannual可变性。在数据设置了的Ishiis的空间模式证明季节的SCSOHCa气候学,两个在冬季和夏天,被风压力和当前的发行量强烈在SCS和它的附近的区域影响。然而,CMIP5适当地为现在的相当不同的空间模式和仅仅一些模型建模在Ishiis捕获主导的特征模式。在他们之中,GFDL-ESM2G具有最好的表演。SCSOHC气候学在上面300m在不同模型极大地变化。他们中的大多数比从Ishiis数据计算的那些伟大得多。然而,在每17个CMIP5模型的每月的OHCa气候学在Ishiis作为那产出类似的变化和大小。至于interannual可变性,在大多数模型的OHCa时间系列的标准差比在Ishiis的那些有点大。在从每17个模型的IshiisOHCa和那的interannual时间系列之间的关联不是令人满意的。在他们之中,BCC-CSM1.1有最高的关联到Ishiis,与大约0.6的一个系数。
简介:在本研究中,我们首次通过基因组上游第一次步移克隆到了雨生红球藻中crtO基因的3个不同大小的5’上游侧翼序列1.1kb,1.9kb和2.2kb。利用生物信息学方法分别预测并比较了这3个不同大小的5’上游侧翼序列,结果发现,三者具有与高等植物相类似的顺式作用元件,如脱落酸反应元件(ABRE)、干燥或低温反应元件(DRE/C-repeat)、几种光反应元件(G1-box,GAG-motif,l-boxandATC—motif)、热激反应元件(HSE)、机械伤害反应元件(WUN-motif)、生长素反应元件(TGA-element)、茉莉酸甲酯反应元件(TGACG-element)和反式作用因子MYB蛋白的结合位点(MBSandMRE)等等,但是三者并不具有典型的TATA框和CCAAT框。上述研究预示了雨生红球藻虾青素合成中crtO基因调控方式的多样化。
简介:在本研究中,我们首次通过基因组上游第一次步移克隆到了雨生红球藻中crtO基因的3个不同大小的5’上游侧翼序列1.1kb,1.9kb和2.2kb。利用生物信息学方法分别预测并比较了这3个不同大小的5’上游侧翼序列,结果发现,三者具有与高等植物相类似的顺式作用元件,如脱落酸反应元件(ABRE)、干燥或低温反应元件(DRE/C-repeat)、几种光反应元件(G-box,GAG-motif,I-boxandATC-motif)、热激反应元件(HSE)、机械伤害反应元件(WUN-motif)、生长素反应元件(TGA-element)、茉莉酸甲酯反应元件(TGACG-element)和反式作用因子MYB蛋白的结合位点(MBSandMRE)等等,但是三者并不具有典型的TATA框和CCAAT框。上述研究预示了雨生红球藻虾青素合成中crtO基因调控方式的多样化。更多还原