简介:Aseriesofmodifiedpoly(methylmethacrylate,PMMA)resinswerepreparedandcomparedtheiradsorptionabilitiestoendotoxin.Theresultsshowedthatadsorbents,whichweregraftedwithtertiaryamineandlongspacingarms,hadthebestadsorptioncapacitiesandgoodbloodcompatibility,Itishopefultobeusedasadsorbentinhemoperfusionforclinicalclearanceofendotoxin.Theinfluenceoforiginalconcentrationofendotoxinonadsorptionandtheadsorptionmechanismwerealsoinvestigated.
简介:usedto结构频繁出现在句式中,与它相关的短语也成为众多句式中的一大亮点。你若想了解有关它的更多知识,那就跟随我们的'镜头'走近它吧。【播报1】usedto的'个性'usedto表示'过去常常做某事',这是一个固定结构,它和其它情态动词的用法一样,to后面直接接动词原形,没有人称和数的变化。它表示过去常做而现在不再存在的习惯或动作,也就是说:它强调'过去的习惯(过去
简介:Therewasarichman.Hehadonlyason.Helovedhissonverymuch.Whenthesongrewup,hemadefriendswithsome1kids.Hedevelopedmanybadhabits.Hebegantosmokeanddidn’tgotoschool.Hehungoutwithhis“friends”onthestreetallday.Themanwasvery2aboutthebadhabitsofhisson.Hetriedhisbestto3hisbadhabitsbuthecouldnotsucceed.Onedayhethoughtofa4toteachhissonalesson.Hewenttothestoreandboughtsome5applesandarotten(腐烂的)one.Hecamebacktohishomeand6hisson.Heaskedhissontoputalltheapplesalongwiththerottenoneinabox.Theson7so.Aftersomedaysthefatheraskedhissontobringtheapples.Ashe8thebox,hewassurprisedtoseeallappleshadbecomerotten.Hefelt9.Hefathertoldhimhowonerottenapplehadinfluencedallthe10.Inthesamewayonebadfriendcouldinfluencedallothers.Thesonlistenedtohisfather’sadvice.Hegaveupbadhabitsandbecamegoodagain.
简介:Inthepresentstudythemembranefoulinginmicrofiltrationusedforcellharvestinginadeadendsystemhasbeeninvestigated.experimentalresultswereanalysedintermsofexitingmembranefiltrationmodelsandmembraneresistances.Thecakefiltrationmodel(CFM)andstandardblockingmodel(SBM)havebeenconsideredinthisstudy.Variousmembraneresistancesweredeterminedatdifferentprocessingtime,feedconcentrationandstirringspeed.Resistancestopermeationinthissystemincludefiltermedium,poreblocking,adsorption,cakelayerandconcentrationpolarization.