Thermal investigations on γ-radiation processed natural medicinal products (Ashwagandha, Amla and Hartiki)
- 29 Downloads
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.
KeywordsCo-60 γ-radiation DSC herbal medicine TG
Unable to display preview. Download preview PDF.
- 1.C. E. Koop, ‘The future of Medicine’ Science, 295 (2002) 233.Google Scholar
- 2.L. C. Mishra, B. B. Singh and S. Dagenaiss, ‘Scientific basis for the therapeutic use of withania somnifera (Ashwagandha) A review, Alternate Medicine Rev., 5 (2000) 334.Google Scholar
- 3.S. K. Bhattacharya, K. S. Satyan and S. Ghosal, Indian J. Exp. Biol., 35 (1997) 236.Google Scholar
- 4.R. Perumal Swamy, S. Ignacimuthu and A. Sen., J. Ethno. Pharmacol., 62 (1998) 175.Google Scholar
- 5.J. K. Jose and R. Kuttan, J. Clin. Biochem. Nutr., V19 (1995) 63.Google Scholar
- 6.J. F. Diehl, ‘Food irradiation-past, present and future’, Radiat. Phys. Chem., 63 (2002) 211.Google Scholar
- 7.M. Wesołowski and P. Konieczyriski, J. Therm. Anal. Cal., 54 (1998) 219.Google Scholar
- 8.M. Wesolowski and Istrokowski, J. Therm. Anal. Cal., 66 (2001) 593.Google Scholar
- 9.K. Ciesla, J. Therm. Anal. Cal., 74 (2003) 259.Google Scholar
- 10.D. Mitra, N. D. Patil, S. Francis and L. Varshney, ‘Thermal investigation on γ-irradiated Ashwagandha (Withania Somnifera) a herbal Ayurvedic product’. National Symposium on Thermal Analysis (THERMANS) 2004, M. S. University of Baroda, Baroda, India, January 20–24, 2004.Google Scholar
- 11.D. Mitra, K. P. Rawat, S. Francis and L. Varshney. ‘Radiation effect studies on dry powders of Amla (Emblica-Officinalis) and Hartiki (Terminalia chebula), Herbal Products’. Trombay Symposium on Radiation and Photo Chemistry TSRP-2004, January 8–12, 2004 BARC, Mumbai, India.Google Scholar