1. Dr.Abdalazim Yassin Abdalgadir, Associate professor in Department of Forest products and  Industries , Faculty of Forestry ,University of Khartoum.

E-mail: abdelazim01@yahoo.com

2. Dr.Ashraf Mohammed Ahmed, Assistant Professor, Deputy Dean, Faculty of Forestry, University of Khartoum, Sudan.

E-mail rawaramiroula@yahoo.com