PackageSizes:25grams,250gramsandbulkquantities
ProductNumbers:19102-25,19102-250and19102-custom
ProductName:HEPES
ProductGrade:MolecularBiologyGrade
AlternativeNames:2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonicacid;4-(2-Hydroxyethyl)piperazine-1-ethane-sulfonicacid;HEPESFreeAcid;HEPESBuffer;C8H18N2O4S
TariffCode:2933.59.9500
Storage:RoomTemperature,ProtectedFromMoisture
Specifications
Appearance:WhiteCrystallinePowder
Purity:is≥99.6%
HeavyMetals:10ppmmax;
A260nm:0.050max
A280nm:0.050max
Solubility:ToPassTest
IgnitionResidue:0.05%max
Sulfate:0.05%max
Properties
PhysicalState:Solid
CASNumber:7365-45-9
ChemicalFormula:C8H18N2O4S
MolecularWeight:283.30
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http://care.diabetesjournals.org/cgi/content/abstract/31/8/1479
OBJECTIVE—Hyperglycemiaisariskfactorformicrovascularcomplicationsandmayincreasetheriskofcardiovasculardiseaseinpatientswithtype2diabetes.ThisstudytestedtheLDLcholesterol–loweringagentcolesevelamHCl(colesevelam)asapotentialnoveltreatmentforimprovingglycemiccontrolinpatientswithtype2diabetesonsulfonylurea-basedtherapy.
RESEARCHDESIGNANDMETHODS—A26-week,randomized,double-blind,placebo-controlled,parallel-group,multicenterstudywascarriedoutbetweenAugust2004andAugust2006toevaluatetheefficacyandsafetyofcolesevelamforreducingA1Cinadultswithtype2diabeteswhoseglycemiccontrolwasinadequate(A1C7.5–9.5%)withexistingsulfonylureamonotherapyorsulfonylureaincombinationwithadditionaloralanti-diabetesagents.Intotal,461patientswererandomized(230givencolesevelam3.75g/dayand231givenplacebo).Theprimaryefficacymeasurementwasmeanplacebo-correctedchangeinA1Cfrombaselinetoweek26intheintent-to-treatpopulation(lastobservationcarriedforward).
RESULTS—Theleastsquares(LS)meanchangeinA1Cfrombaselinetoweek26was–0.32%inthecolesevelamgroupand+0.23%intheplacebogroup,resultinginatreatmentdifferenceof–0.54%(P<0.001).TheLSmeanpercentchangeinLDLcholesterolfrombaselinetoweek26was–16.1%inthecolesevelamgroupand+0.6%intheplacebogroup,resultinginatreatmentdifferenceof–16.7%(P<0.001).FurThermore,significantreductionsinfastingplasmaglucose,fructosamine,totalcholesterol,non–HDLcholesterol,andapolipoproteinBweredemonstratedinthecolesevelamrelativetoplacebogroupatweek26.
CONCLUSIONS—ColesevelamimprovedglycemiccontrolandreducedLDLcholesterollevelsinpatientswithtype2diabetesreceivingsulfonylurea-basedtherapy.
磷脂C、H、O、N、P固醇C、H、ODNA 和RNA一样 CHONP
这个“类”是什么意思?

