Journal of Thermal Analysis and Calorimetry

, Volume 78, Issue 3, pp 821–829 | Cite as

Thermal investigations on γ -radiation processed natural medicinal products (Ashwagandha, Amla and Hartiki)

  • D. Mitra
  • S. Francis
  • L. Varshney


DSC and TG studies were carried out on γ -radiation processed Indian natural products of medicinal importance, namely Ashwagandha (Withania Somnifera), Amla (Emblica Officinalis) and Hartiki (Terminalia chebula). DSC thermoanalytical curves were recorded from 35 to 400°C in air and nitrogen atmosphere. Similarly, TG thermoanalytical curves were taken from 35 to 700°C in air and nitrogen atmosphere. Irradiated products gave significantly different thermoanalytical profiles in comparison to non-irradiated samples. The differences were observed above decomposition temperature of 200°C and were non-linear with respect to radiation dose. Partial oxidation of the products during irradiation in air could be responsible for the observed differences.

TG DSC Co-60 ? -radiation herbal medicine 


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Copyright information

© Kluwer Academic Publisher/Akadémiai Kiadó 2004

Authors and Affiliations

  • D. Mitra
    • 1
  • S. Francis
    • 1
  • L. Varshney
    • 1
  1. 1.Product Development GroupRadiation Technology Development SectionMumbaiIndia

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