1. Department of Chemistry, Research Unit of Noxious Chemistry and Environmental Engineering, Faculty of Science, University of Dschang, Dschang, Cameroon
2. Department of Paper Sciences and Bioenergy, University Institute of Wood Technology, University of Yaoundé I, Mbalmayo P.O. Box. 306, Cameroon
3. Department of Process Engineering, National Higher Polytechnic School of Douala, University of Douala, P.O. Box. 2701 Douala, Cameroon
4. Institute of Chemistry, Faculty of Process and Systems Engineering, Universität Platz 2, 39106 Magdeburg, Germany
5. Laboratory for Bioinspired Materials—BMBT, Institute of Microsystems Engineering—IMTEK, University of Freiburg, 79110 Freiburg, Germany
6. Freiburg Materials Research Center—FMF, University of Freiburg, 79104 Freiburg, Germany
7. Freiburg Center for Interactive Materials and Bioinspired Technologies—FIT, University of Freiburg, 79110 Freiburg, Germany