Sunday 14 June 2015

New Sun Screen Lotion made of Engineered Zinc Oxide Nanoparticles (E-ZnO NPs) by IIT Bombay

  • Sunscreens have core ingredient called zinc oxide nanoparticles (NPs) which block a portion of Ultra violet Rays -  UVA – but they also emit some UVA of their own which then penetrates the dermal layer of the skin and enhances the generation of ‘cancer-inducing radicals’. 
  • IIT Bombay has made what they call engineered zinc oxide nanoparticles (E-ZnO NPs) 
    • New E-ZnO NPs can bypass harmful UVA and UVB emission while at the same time make it a “broadband UV absorber and broadband visible emitter”
      • This visible emission is neither harmful nor dangerous for the skin when compared to UVA emission from normal zinc oxide NPs
    • The scientists also said E-ZnO NPs can impart a “brightening effect” or glow to the human skin. 
    • With its camouflaging effect, it will find its utility in wrinkle-free creams
  • Harmful Impacts of UVA
    • Damages DNA and other biomolecules due to its ability to generate ‘reactive oxygen species’ which damages human genetic material, thereby leading to cancer. 
      • A recent WHO report said one of every three cancer cases was of the skin and UV rays were a major culprit.


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