简介:Atacertainhightemperature,thiscyclewillbedominantandendtherp-processtoheavierregion[2].Itprovidesanuppertemperaturelimitforrp-processalongtheprotondriplinetoproducenuclidesbeyondA=84,includingthelightpnuclidesof92;94Mo,96;94Ru.TheexistenceofZr-Nbcycleisanimportantquestioninrp-process[2].α-separationenergy(Sα)of84Moplaysanimportantroleintheformationofthiscycle.Astrongenhancementof83Nb(p,α)reactionrateisduetoaverylowSαof84Mo[1].
简介:Aretentionpredictionsystem(RPS)ofsevenO-ethylN-isopropylphosphoro(thioureido)-thioatesinreversedphaseHPLCwasinvestigated.Thesystemisbasedonthesolventselectivitytriangleconcept.Threemolecularstructureparameters(hydrophobicityⅡ,substituentlengthL,andsubstituentmaximumwidthB5)wereusedtodescribethequantitativestructure-retentionrelation-ships.Withthesequantitativerelationships,theretentionbehavioursofothereighthomologsfordifferentmobilephasecompositionwerepredicted.Thepredictedvalueswereconsistentwiththemeasuredvalueswithinrelativeerrorof10%,whichmeansthatitispossibletoapplythereportedmethodtopredictretentionvaluesforqualitativepurposesfordifferentmobilephasecompositions.