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Articles by Mohamed Ismail Abdul Karim
Total Records ( 3 ) for Mohamed Ismail Abdul Karim
  Suraini Abd-Aziz , Gan Siew Hung , Mohd Ali Hassan , Mohamed Ismail Abdul Karim and Noraini Samat
  Solid-State Fermentation (SSF) of Aspergillus niger FTCC 5003 on Palm Kernel Cake (PKC) is a practical approach to upgrade PKC into value added product. Present study was conducted on Aspergillus niger FTCC 5003 growth profile and models that are able to describe the growth in SSF using PKC substrate. Due to the difficulties of separating cell biomass quantitatively from the substrate for SSF systems, indirect method for measurement of cell growth during SSF of PKC by Aspergillus niger FTCC 5003 was studied based on the estimation of glucosamine and protein content. Preliminary relationships between glucosamine and protein contents to fungal dry cell weight (Dw) were developed using simulated homogenous SSF data using glass beads as support materials. Both glucosamine and protein contents were well correlated to the fungal dry cell weight in SSF on support materials for protein and glucosamine, respectively. The equations obtained were used for the estimation of cell biomass profile during SSF of PKC from the data of glucosamine and protein as growth indicator study. The estimated fungal dry cell weight based on protein concentration and β-mannanase activity as metabolic activity for microbial growth were well correlated to PKC dry weight which, indicating that both were suitable marker in describing the growth of A. niger FTCC 5003 in this system. In contrast, estimated fungal dry cell weight based on glucosamine concentration was not suitable to describe the growth of A. niger FTCC 5003.
  Maizirwan Mel , Mohamed Ismail Abdul Karim , Mohamad Ramlan Mohamed Salleh and Rohane Abdullah
  The study was conducted to determine the critical point of pO2 level in the production of lactic acid by Lactobacillus rhamnosus. The fermentation process was successfully carried out in laboratory scale fermenter/bioreactor using different pO2 level (the main parameter that significantly affects the growth of L. rhamnosus and lactic acid production) together with two other parameters; the agitation rate and pH. From the result, it was observed that the best production of lactic acid with the concentration of 16.85 g L-1 or 1.68% production yield has been obtained at the operating parameters of 5% pO2 level, agitation speed of 100 rpm and sample pH 6. The critical point of pO2 was found to be between 5 and 10%.
  Olorunnisola Kola Saheed , Parveen Jamal , Mohamed Ismail Abdul Karim , Zahagir Alam and Suleyman Aremu Muyibi
  White rot fungus are valuable class of filamentous and spore forming strains capable of use as animal feed supplements when cultivated under submerged state bioconversion. Selected bacidiomycetes; Phanerochaete chrysosporium, Panus tigrinus M609RQY (M6) and RO2 were grown solely on liquid and solid substrates of banana peel, pineapple peel and papaya peel. On banana peel (solid and liquid), RO2 has the highest protein (15.88 and 14.08 mg g-1), followed by P. chrysosporium (15.09 and 13.56 mg g-1) and M6 (13.24 and 8.07 mg g-1). On pineapple peel, RO2 protein is 17.71 and 12.79 mg g-1, M6 12.61 and 12.32 mg g-1. P. chrysosporium produced 12.27 and 6.85 mg g-1 protein. RO2 produced 15.64 and 12.94 mg g-1 protein on Papaya peel, M6 produced 9.23 and 10.09 mg g-1 while P. chrysosporium synthesized 8.16 and 10.21 mg g-1. P. chrysosporium, M6 and RO2 produced good α-amylase and cellulase enzyme activities that assisted in substrate degradation for protein synthesis.
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