Alkylating AgentsAntineoplastic Agents, AlkylatingDrug ResistanceO(6)-Methylguanine-DNA MethyltransferaseAlkylationRadiation DosageRadiation, IonizingMethylnitronitrosoguanidineMethyl MethanesulfonateRadiation InjuriesMechlorethamineDose-Response Relationship, RadiationCarmustineDrug Resistance, MicrobialDrug Resistance, NeoplasmRadiation ToleranceChlorambucilEthyl MethanesulfonateDrug Resistance, BacterialDNA RepairRadiationDacarbazineNitrogen Mustard CompoundsDNA DamageMelphalanRadiation ProtectionRadiation MonitoringDrug Resistance, MultipleGuanineCyclophosphamideAntineoplastic AgentsMethylnitrosoureaMutationDisease ResistanceCell SurvivalSulfuric Acid EstersMethyltransferasesRadiotherapyMutagensVascular ResistanceUltraviolet RaysEthylnitrosoureaGamma RaysNitrosourea CompoundsThiotepaRadiation OncologyDrug Resistance, ViralDrug Resistance, Multiple, BacterialCombined Modality TherapyMolecular Sequence DataNeoplasms, Radiation-InducedPhosphoramide MustardsTriaziquoneAnti-Bacterial AgentsMitomycinsDose-Response Relationship, DrugEtanidazoleDNACosmic RadiationMustard GasRadiation Injuries, ExperimentalEscherichia coliAziridinesLeukemia, Radiation-InducedMicrobial Sensitivity TestsCisplatinMitomycinBrain NeoplasmsTime FactorsTumor Cells, CulturedCell Line, TumorDNA Modification MethylasesRadiation PneumonitisDNA GlycosylasesRadiation-Sensitizing AgentsCell LineNeoplasms, Second PrimaryDrug SynergismCricetinaeBase SequenceAntineoplastic Combined Chemotherapy ProtocolsGliomaDNA Repair EnzymesPropiolactoneBackground RadiationEthylmaleimideLomustineNeoplasmsNimustineNylonsApoptosisDoxorubicinRadiotherapy DosageGlioblastomaTetracycline ResistanceDrug Screening Assays, AntitumorMethionine SulfoximineBacterial ProteinsDNA AdductsRadiation Effects