(i) CANADA
NSERC Postdoctoral Fellow (Aug 1981 – June 1984) in the Department of
Chemistry, University of British Columbia, Vancouver, BC, Canada.
Chemistry, University of British Columbia, Vancouver, BC, Canada.
(ii) UNITED STATES OF AMERICA (USA)
Robert A. Welch Foundation Postdoctoral Fellow (June 1984 – June 1986) in the Division of Biochemistry, Department of Human Biological Chemistry and Genetics, University of Texas Medical Branch at Galveston, Texas, USA.
(iii) UNITED STATES OF AMERICA (USA)
Robert A. Welch Foundation Postdoctoral Fellow (May 1987 – Aug 1987) in the Division of Biochemistry, Department of Human Biological Chemistry and Genetics, University of Texas Medical Branch at Galveston, Texas, USA.
(iv) UNITED STATES OF AMERICA (USA)
Robert A. Welch Foundation Postdoctoral Fellow (May 1988 – Aug 1988) in the Division of Biochemistry, Department of Human Biological Chemistry and Genetics, University of Texas Medical Branch at Galveston, Texas, USA.
(v) EGYPT
Participated in the discussion meeting (Jan 16 – 25, 1993) of Fourth International School and Workshop on Computational Crystallography held at Aswan, Egypt.
(vi) POLAND
Participated in the discussion meeting (May 18- 26, 1994) of the 2nd International School and Symposium on Synchrotron Radiation in Natural Sciences at Jaszowiec, Poland.
(vii) ITALY
Presented a paper at the International School on Crystallography (May 27 – June 5, 1994) of Molecular Biology held at Ettore Majorana Centre, Erice – Sicily, Italy.
(viii) GERMANY
DBT Overseas Research Associateship (Mar 1996 – May 1996) to work in collaboration with Prof. Dr. Udo Heinemann at the Department of Kristallographie, Centrum fur Molekulare Medizin, Berlin-Buch, Germany.
(ix) MALAYSIA
Invited speaker for Asian Crystallographic Association (AsCA’98) Seminar on Crystallography (Oct 13 –15, 1998) held at Universitat Kebangasan, Bangi, Malaysia.
(x) SINGAPORE
Participated in the discussion meeting in the Department of Chemical Engineering National University of Singapore during October1998.
(xi) GERMANY
INSA Visiting Scientist (Dec 2000 – Mar 2001) to work in collaboration with Prof. Dr. Udo Heinemann at the Department of Kristallographie, Centre for Molecular Medicine, Berlin-Buch, Germany.
(xii) UNITED STATES OF AMERICA (USA)
Visiting Scientist (June-Aug 2002) to work in the collaborative project with Dr. Swaminathan in the Structural Biology Department, Brookhaven National Laboratory, Upton, New York, USA.
(xiii) GERMANY
DAAD Visiting Scientist ( May 2004 – July 2004) to work in collaboration with Prof. Dr. Udo Heinemann at the Department of Kristallographie, Centre for Molecular Medicine, Berlin-Buch, Germany.
(xiv) GERMANY
INSA Visiting Scientist (April 2006 – June 2006) to work in collaboration with Prof. Dr. Udo Heinemann at the Department of Kristallographie, Centre for Molecular Medicine, Berlin-Buch, Germany
(xv) JAPAN
Visiting Scientist (March 12-26, 2007) to work in collaboration with Prof. Yokohama at RIKEN/SPring8 centre, Japan.
(xvi) SINGAPORE
Invited visitor to the Structural Biology Department, NanYang Technological University, Singapore during March 2007.
(xvii) GERMANY
INSA Visiting Scientist (Jan 2009 - April 2009) to work in collaboration with Prof. Dr. Udo Heinemann at the Department of Kristallographie, Centre for Molecular Medicine, Berlin-Buch, Germany 