Applied Microbiology: Open Access
Open Access

Department of Natural Sciences, American University of Nigeria, Yola, Nigeria

Biography

Onyebarachi GC is a assoiate professor at American University of Nigeria, Department of natural sciences. He had specialised in brief research about natural sciences. He is a assoiate member of Department of Educational Foundations Nnamdi Azikiwe University, Awka, Anambra State, Nigeria. He has extended his valuable service as a Professor and has been a recipient of many award and grants.

Publications

• Research Article   
  Production, Purification and Characterization of Polygalacturonase from Aspergillus flavus Grown on Orange Peel
  Author(s): Doughari JH* and Onyebarachi GC
  
  Polygalacturonase is a pectinolytic enzyme that catalyzes the hydrolytic cleavage of the polygalacturonic backbone linkage chain. In this study, polygalacturonase was produced from Aspergillus flavus isolated from an orange waste dump site. Production was carried out in solid state fermentation. Optimum production of polygalacturonase was found at incubation period of 96 h, pH 4.5 and at 35°C using ammonium sulphate, orange peel as best nitrogen and carbon sources, respectively. The enzyme was precipitated with 60% ethanol resulting in 3.54 fold purification, and purification of the enzyme with Sephadex G-75 resulted in 9.93 fold. The purified enzyme showed maximum activity in the presence of polygalacturonic acid at 35°C and pH 4.5, while for sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) analysis, molecular weight obtained was 66 KDa. The K.. View More»
  

  Abstract PDF