
Producedfromhumanfibroblastsmaintainedinserum-freemediaandthenpurifiedbiochemically.ThisissuppliedsterileinCAPSsalinebuffer.
Caution:Ifhandledimproperly,somecomponentsofthisproductmaypresentahealthhazard.Takeappropriateprecautionswhenhandlingthisproduct,includingthewearingofprotectiveclothingandeyewear.Disposeofproperly.
Fibronectinisamulti-domainglycoproteincomposedofanarrayofmultiplerepeatedmodularstructures.Cellularfibronectin,anadhesionglycoproteinoftheextracellularmatrix,existsasadimerwithamolecularmassof~550kDa. Thisstructureiscomposedoftwoheterodimers,theAchainandtheBchaincontainingthetypeIIIconnectingsegmentregion.Cellularfibronectindiffersfromplasmafibronectinbythepresenceofadditionalpolypeptidesegmentsanditscapacitytospecificallyregulatemorphologyandgrowthofattachedcellsincludingstemcells[1,2,3,4].Multipledomainsoffibronectinshowbindingaffinitiesforcollagen,fibrin,heparin,andspecificcellmembranereceptorssuchasintegrins.Fibronectinmatrixassemblyisessentialfornormaldevelopmentandcontributestothegenerationoftumormetastases.
SciencellTMHumanCellularFibronectin(HCF)isproducedfromhumanfibroblastsmaintainedinserum-freemediaandthenpurifiedbiochemically.HCFissuppliedsterileinCAPSsalinebuffer.
ProductSpecification
Quantity: 0.1mg
Concentration: 0.5mg/ml
Storagebuffer: CAPSsalinebuffer,pH11.
Specifications:
CatalogNo. | 8488 |
CountryofManufacture | UnitedStates |
ProductCode | HCF |
Size/Quantity | 100μg |
ProductUse | THESEPRODUCTSAREFORRESEARCHUSEONLY.Notapprovedforhumanorveterinaryuse,forapplicationtohumansoranimals,orforuseinclinicalorinvitroprocedures. |
Storage | Itisrecommendedtostoretheproductassingleusealiquotsat-80°C.Thawingshouldbedoneslowlyat2-8°Cwithnoagitation.Materialthatfailstodissolvecanberemovedbycentrifugation.Avoidrepeatingfreeze/thawcycles. |
ShippingInfo | Dryice. |
References | 1.YamadaKMandAkiyamaSK(1984).InMethodsforpreparationofmedia,supplementsandsubstrataforserum-freeanimalcellculture.pp.215-30.AlanR.Liss,Inc.,NewYork.2.AkiyamaSetal.(1985).FibronectinandfibronectinfragmentsinExtracellularMatrix:APracticalApproach,(NewYork),p.183.3.PottsJRandCampbellID(1994).FibronectinStructureandAssembly.Curr.CellBio,6:648-655.4.SinghP,SchwarzbauerJE(2012).Fibronectinandstemcelldifferentiation-lessonsfromchondrogenesis.JCellSci,15:3703-12. |
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RMgX + RX = R-R + MgX2.
这个反应需要的能量比生成格氏试剂的高,
因此降低反应温度是第一个选择。
其次, 增加镁得摩尔比, 让 RX与镁有更多机会反应, 而不是与RMgX。
第三, 降低RX的浓度, 即用更多的溶剂, 因为溶剂和格氏试剂有很显著的溶剂络合。
第四, 缓慢滴加RX., 即降低RX.在反应体系的浓度。
第五, 增加搅拌速率, 即, 让RX.与镁有更好的接触。
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MaggotsFasterThanScalpelinWoundDebridement
December19,2011—Maggotdebridementtherapy(MDT)appearstobemoreeffectiveforwounddebridementcomparedwithconventionaltherapy,butonlyat1week;afterthattime,anothertypeofdressingshouldbeused,newresearchsuggests.
KristinaOpletalovà,MD,fromtheDepartmentofDermatology,UniversityofCaen,France,andcolleaguespublishedonlineDecember19intheArchivesofDermatology.
MedicalmaggotswereapprovedbytheUSFoodandDrugAdmiNISTrationasamedicaldeviceforwounddebridementin2004.Accordingtotheresearchers,useofmaggotsintreatingwoundsisassociatedwitheffectivewounddebridement,antibacterialeffects,andstimulationofwoundhealing.
However,theypointout,"[r]elativelyfewclinicalstudieshavebeenconductedandtheresultsarenotclear,partlyowingtomethodologicassessmentproblems."
InthecurrentProspective,randomizedcontrolled,phase3clinicaltrial,theresearcherssoughttodeterminetheefficacyofbaggedlarvaeonwounddebridementincomparisonwithconventionaltreatment.
TheprimaryobjectivewastocomparethemeanpercentageofsloughinwoundstreatedwithMDTwiththatofconventionaltreatmentatday15.Thestudyincluded119patientswithanonhealing,sloughywoundthatwas40cm2orsmallerandlessthan2cmdeep.Patientsalsohadananklebrachialindexof0.8orhigher.
Treatmentwasadministeredduringa2-weekhospitalstay.Conventionaltreatmentconsistedofsurgicaldebridement3timesaweekwithascalpel,withuseoftopicalanesthesia.TheMDTwasadministeredusinganencloseddressing(Vitapad,BioMondeLaboratories)containing80sterilemaggots.Atdischarge,aconventionaldressingwasapplied,andpatientswerefollowed-upatday30.
DebridementbyMDTwassignificantlyfasterthansurgicaldebridementduringthefirstweekoftreatment,reachingthesamelevelthecontrolgroupreachedatday15.NobenefitforMDTcomparedwithconventionaltreatmentinhealingrateswasobserved.Atday8,54.5%intheMDTgroupvs66.5%inthecontrolgroup(P=.04)hadevidenceofsloughandwoundhealing.However,byday15,themeanpercentageofsloughwas55.4%intheMDTgroupand53.8%inthecontrolgroup(P=.78).
"AthoughMDTshowsnosignificantbenefitatday15comparedwithconventionaltreatment,debridementbyMDTissignificantlyfasterandoccursduringthefirstweekoftreatment,"theresearchersconclude."Becausethereisnobenefitincontinuingthetreatmentafter1week,anothertypeofdressingshouldbeusedafter2or3applicationsofMDT."
Painscoresweresimilarandmildinbothgroups,althoughincontrasttoconventionaltreatment,MDTwasperformedwithouttopicalanesthesia.
Accordingtotheresearchers,noneofthepatientswerereticentaboutundergoingMDT."[A]crawlingsensationonthewoundwasrarelyandalmostequallynotedinbothgroups,revealingthatthesensationwassubjective,"Dr.Opletalovàandcolleaguespointout.
TwoquestionsregardingMDTremainunanswered,theauthorsnote."Candebridementbeimprovedusingmoremaggotsperdressing?Ifso,wouldthesedressingsbemorepainful?Furtherstudiesareneededtoanswerthesequestions."
ThestudywassupportedbygrantsfromtheClinicalResearchHospitalProgramandfromtheFrenchSocietyofDermatology.Theauthorshavedisclosednorelevantfinancialrelationships.
支原体培养则是取样后在培养基上培养,看有多少支原体菌落会长出,是比较直观和可信的结果。
总体来讲,这两种检查手段可信度都较高,结合一起,不仅可以可靠的知道有无解脲支原体感染,还能知道感染是否严重。


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