. The 14th Iranian Chemistry and Chemical Engineering Congress, Department of Chemistry, Faculty of Science, Terbeyet Moallem University, Tehran, February 17-19, 2004, I. R. Iran

(17 papers were presented)

The 13th Iranian Seminar of Organic Chemistry, Bu-Ali Sina University, Hamedan, Sept. 7-9 2006, I.R.Iran

(17 papers were presented).

International Symposium on Environmental Degradation of Materials and Corrosion Control in Metals, 2^nd, Vancouver, BC, Aug. 24-27, 2003 Canada,

(1 papers was presented)

. 2nd International Congress on Nanoscience and Nanotechnology Faculty of Chemistry, University of Tabriz 28-30 October 2008,

(2 papers were presented).

The 15th Iranian Seminar of Organic Chemistry (15ISOC), Razi University Kermanshah, Iran, 2008, August, 27-29, I.R.Iran

(13 papers were presented).

International Catalysis Conference (ICC 2008), Shahid Beheshti University, Tehran, I.R.Iran, April 28-30 2008,

(1 paper was presented).

The 9th International Seminar on Polymer Science and Technology, (ISPST2009) Iran Polymer and Petrochemical Institute, Tehran, Oct. 17-21, 2009, Iran.

(24 papers were presented). One paper was selected as best presentation.

The 14th Iranian Seminar of Organic Chemistry, University of Zabol, Zabol, March. 4-6 2008, I.R.Iran

(6 papers were presented).

The 13^th Asian Chemical Congress (13 ACC), Shanghai International Conference Center, Shanghai, China, Sept. 13-16, 2009. (1 paper was presented).

The 8th Iranian Seminar on Polymer Science and Technology, (ISPST2007) Iran Sharif University of Technology, Tehran, Oct. 23-25, 2007, I.R.Iran.

(15 papers was presented). Two papers were selected as best papers.