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- NOST-V (Tirupathi, India), Nov. 1995.
- Indian Institute of Technology, Madras, Nov. 1995.
- Indian Association for the Cultivation of Science, Calcutta, Jan.
2000.
- Gorakhpur University, Gorakhpur, March 2001.
- Universite de Rennes 1, Rennes, Cedex, France Feb. 2002
- Tokushima Bunri University, Tokushima 770-8514, JAPAN, 2002
- Osaka University, Osaka, JAPAN, 2003
- Osaka City University, Osaka, JAPAN, 2003
- Osaka Prefecture University, Osaka, JAPAN, 2003
- Nagoya University, Nagoya, JAPAN, 2003
- Chemistry Biology Interface: Synergistic New Frontiers, New Delhi 2004
- 3rd Singapore-India Collaborative & Cooperative Chemistry Symposium, IITK 2004
- 47th Symposium on the Chemistry of Natural Products, Tokushima, Japan, October 07-09, 2005
- Indian Institute of Science, Bangalore 2005
- Astra Zenecca, Bangalore 2005
- University of Hyderabad, Hyderabad 2005
- Indo-French Conference, Indian Institute of Chemical Technology, Hyderabad, India 2005
- National Organic Symposium Trust-XI, Goa, India 2005
- University of Gorakhpur, Gorakhpur 2007
- Indian Institute of Chemical Technology, Hyderabad 2007
- Refresher Course in Chemistry on Emerging Areas in Chemical Sciences,
Gorakhpur University 2007 (a series of four lectures on Stereochemistry and Stereoelectronic Effects
in Organic Chemistry were delivered).
- National Conference on Emerging Trends in Chemistry-Biology Interface, ETCBI-2011, Nainital, 2011
- Pharmacy Day, National Institute of Pharmaceutical Education and Research, Raibareli, 2013
- National Symposium on Frontiers in Organic Chemistry, University of Hyderabad, 2013
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