1,2-DimethylhydrazineDimethylhydrazinesMethylhydrazinesMonomethylhydrazineColonic NeoplasmsCarcinogensHydrazinesColonAberrant Crypt FociPrecancerous ConditionsDNA DamageChlorophyllidesMethylazoxymethanol AcetateNeoplasms, ExperimentalRats, Inbred F344CocarcinogenesisIntestinal NeoplasmsIntestinal MucosaAnticarcinogenic AgentsAmorphophallusAdenosarcomaAdenocarcinomaAzo CompoundsCecal NeoplasmsIntestine, LargeRats, Inbred StrainsDietary FiberAdenomaColonic DiseasesAlkylationGuanineRats, WistarPectinsCelluloseInjections, SubcutaneousRectumCecumAzoxymethaneCell DivisionIntestine, SmallMutagensDietDisease Models, AnimalGlutathione Peroxidase