请将以下句子翻译成汉语：Theresearchersmeasuredtheimpactofchocolateonplateletsintheblood.Plateletactivationisthoughttobeanimportantriskfactorinbloodclotting.Theresearchersfoundnotonlyanincreaseinantioxidantcapacityafterchocolateconsumption,butalsomodulationofcertaincompoundswhichaffectbloodvessels.