Faculty of Science and Technologies;
University of Sarh;
Sarh;
Chad;
Department of Chemistry;
Higher Teachers Training College;
University of Yaounde 1;
Yaounde;
Cameroon;
Higher Institute of the Sahel;
University of Maroua;
Maroua;
Cameroon;
National Advanced School of Agro-Process Industries;
University of Ngaoundéré;
Ngaoundéré;
Cameroon;
Yellow; Shea; Butter; Decolourisation; Doehlert; Experimental; Matrix; RSM; Optimisation;