•  VI^th International Symposium on Solid Phase Synthesis and Combinatorial Chemical Libraries, August 31-September 4, 1999, York, UK

• Advances in nucleic acid monitoring, manipulation, and sequencing technologies, January 24-27, 1999, San Jose, CA, USA

• XVIIth International Carbohydrate Symposium, July 17-22, 1994, Ottawa, Canada.

• Canadian Society of Biochemistry and Molecular Biology, June 16-18, 1994, Montreal, Canada.

• Keystone Symposium Carbohydrates in Biology and Medicine, March 19-26, 1994, Frisco, CO, U.S.A.

• XVIth International Carbohydrate Symposium, 5-10 July 1992, Paris, France.

• Oxford Glycosystems, Oxford, UK (1991)

• Johns Hopkins University, Baltimore, MA, USA (1990)

• l9th Annual Meeting of the Society for Complex Carbohydrates, 10-13 October 1990, San Diego, CA, U.S.A

• 8th Annual Chemistry Graduate Student Symposium, 23-24 May 1990, SUNY at Buffalo, Buffalo, N.Y., U.S.A.

• 18th Annual Meeting of the Society for Complex Carbohydrates, 9-11 November 1989, Ann Arbor, MI, U.S.A,

• 7th Annual Chemistry Graduate Student Symposium, 24-25 May 1989, SUNY at Buffalo, N.Y., U.S.A.

• 6th Annual Chemistry Graduate Student Symposium, 25-26 May 1988, SUNY at Buffalo, Buffalo, N.Y., U.S.A.

• Sigma Xi Student Poster Presentation, 23 March 1988, SUNY at Buffalo, Buffalo, N.Y., U.S.A.

• 30th International Congress of Pure and Applied Chemistry, 8-13 September 1985, Manchester, U.K.