The 2nd Polymer Science and Technology Meeting, Amir-Kabir University of Technology, Tehran, March, 12-14, 1991, I.R.Iran

The 3rd Iranian Seminar of Organic Chemistry, Teacher,s Training University of Arak, Arak, August 16-18, 1994, I.R.Iran

The 5th Annual Iranian Chemistry and Chemical Engineering Congress, Department of Chemical Engineering, Iran University of Science and Technology, Tehran, August 27-30, 1990, I.R.Iran

The 3rd Iranian Seminar of Inorganic Chemistry, Tabriz University, Tabriz, August 2-3, 1994, I.R.Iran

The 4th Annual Iranian Chemistry and Chemical Engineering Congress, University of Gilan, Rasht, September 4-7, 1989, I.R.Iran

The 1st International & 3rd National Seminar of Polymer Science and Technology, Shiraz University, Shiraz, May 2-4, 1994, I.R.Iran

The 3rd Annual Iranian Chemistry and Chemical Engineering Congress, University of Sistan and Baluchestan, Zahedan, September 4-7, 1988, I.R.Iran

1st International & 8th National Congress on Chemistry and Chemical Engineering Shahid Beheshti University, Tehrah September 1-3, 1993 I.R.Iran

The 5thIranian Seminar of Organic Chemistry, College of Chemistry, Isfahan University of Technology, Isfahan, August 17-19, 1996, I.R.Iran

The 14th Interational Conference on the Chemistry of the Organic State ( ICCOSS XIV ), Robinson College and Cambridge University, Cambrige, UK, July 25-30, 1999, UK