Chapter 1: Radiation biology: historical background, sources and complications.- Chapter 2: Algal radioprotective phytochemicals: Sources and potential applications.- Chapter 3: Bio-prospecting of photoprotective compounds in algae.- Chapter 4: Unraveling fungal radioprotectants and their applications.- Chapter 5: Recent advances in metabolomics and molecular genomics for the production of photoprotective compounds.- Chapter 6: Bioprospecting and evolutionary significance of radioprotectors in non-flowering lower plants.- Chapter 7: Radioprotective phytochemicals: diversity, efficacy, application and commercialization.- Chapter 8: Impacts of climate alterations in the biosynthesis of defensive natural products.

- Chapter 9: Cancer therapeutics: mechanism of action, radiation toxicity and drug formulation.- Chapter 10: Role of nanotechnology in the development of radioprotective formulations.- Chapter 11: Radioprotective effects of nutraceuticals and food products.- Chapter 12: Bioprospecting of radioprotective compounds in bacterial community.- Chapter 13: Pharmacology of synthetic and natural radioprotactants: application and consequences in cancer therapeutics.- Chapter 14: Immunochemistry: consequences and mechanism of protection in chemotherapeutics.- Chapter 15: Radioprootective therapeutics: recent trends and future applications.