References

  •  Prof . Dr. Hamid Mohamed Mustafa Prof of Chem. Eng. – Dept.of Chem. Eng. – King Saud University -Riyad – Kingdom of Saudi

Arabia

  • Dr. Bashir Mohammed El Hassan – Associate Prof. of Chem. Eng

Dept. of Chem. Eng. – University of Khartoum – Sudan
Tel:00249 912918898

  •  Dr. Abd ElShakour Awad El Karim, Associate Prof. of Chem. Eng

Dept. of Chem. Eng. – University of Khartoum – Sudan,
Tel: 00249 0912392604