N.C. AKAEZE

The study was carried out to determine the yield, physical and chemical composition of Opepe leaves (Nauclea diiderrichi) De Wild. and T. Durand. The leaves used were harvested and blended, before theleaf Protein Concentrate was extracted using 3 different methods (Heat coagulation , acid coagulation and alum precipitation methods) . The result from the analysis showed that acid coagulation , alum precipitation and heat coagulation methods yielded 2.398% , 3.913% and 6.383% respectively. The yield of bagasse was 23.508%. The result of the proximate analysis showed that the dry matter and NFE were higher in alum precipitation method than in acid coagulation and heat coagulation methods . It also showed that CP , CF and ASH were higher in the acid coagulation method than in the alum precipitation and heat coagulation methods, while EE was higher in the heat coagulation method than in the other two methods . The mineral analysis showed that Mg , Na and P were higher in the heat coagulation method than in the acid coagulation and alum precipitation methods . It also showed that K , Fe and Mn were higher in the acid coagulation method than in the alum precipitation and heat coagulation methods . LPC result of Ca , showed that acid and heat coagulation methods yielded the same amount, which were higher than that of alum precipitation method .

The study was carried out to determine the yield, physical and chemical composition of Opepe leaves (Nauclea diiderrichi) De Wild. and T. Durand. The leaves used were harvested and blended, before the leaf Protein Concentrate was extracted using 3 different methods (Heat coagulation , acid coagulation and alum precipitation methods) . The result from the analysis showed that acid coagulation , alum precipitation and heat coagulation methods yielded 2.398% , 3.913% and 6.383% respectively. The yield of bagasse was 23.508%. The result of the proximate analysis showed that the dry matter and NFE were higher in alum precipitation method than in acid coagulation and heat coagulation methods . It also showed that CP , CF and ASH were higher in the acid coagulation method than in the alum precipitation and heat coagulation methods, while EE was higher in the heat coagulation method than in the other two methods . The mineral analysis showed that Mg , Na and P were higher in the heat coagulationmethod than in the acid coagulation and alum precipitation methods . It also showed that K , Fe and Mn were higher in the acid coagulation method than in the alum precipitation and heat coagulation methods . LPC result of Ca , showed that acid and heat coagulation methods yielded the same amount , which were higher than that of alum precipitation method .

The experiment was conducted to determine the yield, physical and chemical composition of leaf protein concentrates and bagasse obtained from oil palm leaf using three different processing methods. The process of extraction were heat coagulation, acid coagulation, and alum precipitation methods. The leaf protein concentrates and bagasse
obtained were further analysed for their chemical and mineral compositions. The yield of LPC and bagasse obtained from acid coagulation, alum precipitation, and heat precipitation were comparable. But, the yield of OLPC was not significantly (p>0.05) different in the acid and alum processing methods, but was significantly (p<0.05) different for the heat processing method. Result, from the chemical analysis shows that the CP and EE of acid coagulation method were significantly (p<0.05) different from alum and heat processing methods. At the same time, the MC and NFE of OLPC for heat were significantly (p<0.05) different from alum precipitation method and acid coagulation method. From the results obtained from this study, Oil palm leaf protein concentrates obtained using heat coagulation, acid coagulation and alum precipitation methods were comparable but heat coagulation would be preferable as a result of its high Ca (633.0), Cu (15.67), Mn (66.83), Zn (108.77), Na (3.46), Mg (501.63), P (417.67), Fe (154.30)
and Cl (1.307) values.