简介:目的探讨珊瑚羟基磷灰石负载含骨形态发生蛋白-2(bonemorphogeneticprotein-2,BMP-2)纳米缓释微球体系在促进人间充质干细胞(humanmesenchymalstemcells,hMSCs)骨形成中的作用。方法从骨移植患者中收集hMSCs,分离培养后使用BMP-2纳米微球作为载体,装载到珊瑚羟基磷灰石(coralhydroxyapatite,CHA)支架上。将CHA-BMP-2-hMSCs与CHA-hMSCs分别植入两组小鼠的L4和L5横向软组织中,10周后检测小鼠碱性磷酸酶(alkalinephosphatase,ALP)活性,通过Westernblot检测Runx2蛋白与骨桥蛋白表达水平,通过显微镜观察骨质生长情况。结果CHA-BMP-2-hMSCs小鼠的支架上骨组织覆盖面积显著大于CHA-hMSCs小鼠,ALP活性显著高于非缓释组小鼠,骨钙素、Runx2蛋白与骨桥蛋白表达水平高于非缓释组小鼠。结论CHA-BMP-2-hMSCs缓释系统有利于在较长时间内诱导骨形成。
简介:再利用Windows的PAINTBRUH功能进行加工修改,一种方便快捷而实用的方法是首先利用图像扫描仪将图像数据自动生成并存入计算机,PAINTBRUH软件只能在Windows环境下运行
简介:ms[4+number*1+q+2*p]=b[2],number=(right-left+8)18*4如果图像的宽度不为8的倍数据时,不过可以把图像数据按getimage()函数产生的格式填于内存缓冲区中
简介:通过三步合成(E)-二(对3-硝基苯甲酸)乙烯(C16H10N2O8)配体,并由此通过溶剂热法合成金属有机框架材料Zn2(EBNB)2(BPY)2·2H2O;采用x射线单晶衍射分析、红外光谱(IR)和热重分析(TG)等对所得结构进行表征,并测试其荧光性能;以洛贝林为模型药物,研究了Zn2(EBNB)2(BPY)2·2H2O对该药物的载药及体外释药性能。研究结果说明,Zn2(EBNB)2(BPY)2·2H2O对洛贝林的最高载入量达0.355g/g,载药体系的体外释药为明显的两相模式。体外细胞毒性实验结果表明,Zn2(EBNB)2(BPY)2·2H2O具有良好的生物相容性。
简介:andthereductionofpublicandsocialexpenses.Economistsmaynotnecessarilysharetheeconomicandsocialinterestsofthetruebelieversandmayhaveavarietyofindividualpsychicstatesregardingtheeconomicandsocialeffectsoftheutopiawhichtheycloakwithmathematicalreason.Nevertheless,orbetteryetthesupranationalstate-aEuropeanstateonthewaytowardaworldstate-capableofeffectivelycontrollingandtaxingtheprofitsearnedinthefinancialmarketsand,onreservesofsocialcapitalthatprotectanentireportionofthepresentsocialorderfromfallingintoanomie.Thissocialcapitalisfatedtowitheraway-althoughnotintheshortrun-ifitisnotrenewedandreproduced.Butthesesameforcesof"conservation"
简介:Therearepowerfulpoliticalobstaclesbetweenpeople.Themainobstaclescomefromthesocialdemocraticmovement.IfwesucceedinovercomingtheseitwillleadtoagenuineThirdWaywhichwillbemuchmoreradical.Weneedtobuildtheleftoftheleft.Intheecologymovementyouhavepeoplewhoarereallyontheleft--evenamongtheCommunistParty,InFrancewehavethistraditionofworkerismwhichisanti-intellectual.Theunionsareveryhostiletointellectualsandtheintellectualsareverydistantfromworkers.In1968itwasveryvisible.NowforthefirsttimebecauseofthefailureofSovietMarxismwearefreefromthat.SoIcanspeakwithaCGTofficialasIamspeakingtoyou.Theyareveryopen.Inasenseintellectualslikemedidnotexist20yearsago.PeoplelikeSartreandFoucaultweresympathetictothemovement,Forcesotherthantheleftaretryingtogainahearing.SoweseetheHaiderphenomenoninAustria.Buthehasnotgoneunchallenged.TherecreationofatrueleftwingmovementwillbethemaininstrumentofthedestructionofHaider.NobodyspokeaboutLePenandtheNationalFrontinFranceduringthehotwinterof1995inFrance.ThemassmovementindefenceofpensionsinItalyalsomarginalisedthefarright.
简介:通过涂覆热分解法制备了Ti/RuO2-ZrO2-SnO2、Ti/RuO2电极材料,采用X射线衍射(XRD)、扫描电镜(SEM)和循环伏安(CV)对电极材料进行表征,考察了电流密度、NaCl质量浓度、pH值及电极间距对废水COD降解率的影响。结果表明,Ti/RuO2-ZrO2-SnO2电极对COD具有更高的降解率,对其进行工艺优化。电极材料对废水降解的最佳工艺条件为电流密度40mA/cm^2,NaCl质量浓度4g/L,pH=5.0,电极间距10mm,COD的降解率达到90.5%。Ti/RuO2-ZrO2-SnO2电极中SnO2与RuO2生成固溶体,有利于增强涂层与基体之间的结合力,提高电极的稳定性;ZrO2起到细化晶粒的作用,致使电极表面粗糙度增加,增强了电极的电催化性能,且降解过程符合一级动力学模型。
简介:A60%Fe/Al2O3catalystwaspreparedbytheco-precipitationmethod.ItwasreducedbyH2toproducemetallicFe,whichwasthensulfidedbyCS2toFe0.96SandFe3S4orphosphidedbytriphenylphosphine(PPh3)inliquidphasestoFe2PandFeP.Itwasfoundthattheironsulfides(Fe0.96SandFe3S4)exhibitedthelowactivityforthehydrodesulfurization(HDS)reactions.TheHDSactivitywasalsolowontheFe(metal)/Al2O3andFe2P/Al2O3catalystssincetheywereconvertedintoFe0.96SandFe3S4duringtheHDSreactions.Incontrast,theFeP/Al2O3wasfoundtobestableandactivefortheHDSreactions.Inparticular,FeP/Al2O3possessedsignificantlysmallerFePparticlesthanFeP/C,leadingtothesignificanthigherHDSactivityofFeP/Al2O3thanFeP/C.