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Articles by Suleyman A. Muyibi
Total Records ( 3 ) for Suleyman A. Muyibi
  Jalal K.C.A. , Md. Zahangir Alam , Suleyman A. Muyibi and P. Jamal
  Forty six bacterial strains were isolated from nine different sources in four treatment plants namely Indah Water Konsortium (IWK) sewage treatment plant, International Islamic University Malaysia (IIUM) treatment plant-1,-2 and –3 to evaluate the bioconversion process in terms of efficient biodegradation and bioseparation. The bacterial strains isolated were found to be 52.2% (24 isolates) and 47.8% (22 isolates) in the IWK and IIUM treatment plants respectively. The results showed that the higher microbial population (9-10x104 cfu mLˉ1) was observed in the secondary clarifier of IWK treatment plant. Only the gram-staining identification was done in the strains isolated from IWK treatment plant not to be determined from IIUM. Among the isolates from IWK, 10 isolates of gram-positive bacillus (GPB) and gram-positive cocci (GPC), 10 isolates of gram-negative bacillus (GNB) and rest were both or undetermined. Gram-negative cocci (GNC) were not found in the isolates from IWK.
  Afifah Drani , Md. Zahangir Alam and Suleyman A. Muyibi
  Potential fungal strains belonging to the genera of Penicillium, Trichoderma and Aspergillus were isolated from various waste sources and tested for their capability to produce cellulase enzyme using Sewage Treatment Plant (STP) sludge as a major substrate. The isolation technique was used in the Potato Dextrose Agar (PDA) media incorporated with the sewage sludge (0.5% Total Suspended Solids, TSS). In addition 1 mL of streptomycin was used to control the growth of bacteria. Colonies appeared in the plate were transferred to the fresh PDA plate for purification and identification. Out of 35 strains, five strains were identified as the potential strains to produce cellulase through Filter Paper Activity (FPA) assay. These five promising strains were TH(U), S-105A and P2-STP isolated from STP sludge, P1-EFB isolated from Empty Fruit Bunched (EFB) compost and O-102A isolated from rotten orange. Various carbon sources; wheat flour, cassava flour, commercial sugar and cellulose were evaluated as a co-substrate with and without EFB supplement using these five potential strains. The strain O-102A was identified as the most promising strain that able to produce cellulase enzyme using STP sludge as a major substrate, cellulose as a co-substrate with supplement of oil palm Empty Fruit Bunches (EFB).
  Salawudeen T. Olalekan , Suleyman A. Muyibi , Qasim H. Shah , Ma`an, F. Alkhatib , Faridah Yusof and Isam Y. Qudsieh
  Problem statement: Current researches have shown that the thermoplastic-clay nanocomposites have failed to live up to the earlier predictions albeit they have found some niche area of applications. This research work therefore aimed at studying the effect of carbon nanotube as secondary filler on the mechanical properties of polypropylene-clay nanocomposite. Approach: Hybrid polypropylene-clay nanocomposite was prepared in the presence of Multiwall Carbon Nanotubes (MWCNTs) as secondary additives using melt intercalation process. The effect of Multiwall Carbon Nanotubes (MWCNTs) on the polypropylene/clay matrix was investigated in terms of dispersion using XRD, tensile test (ASTM D 638) and notched Izod impact test (ASTM D256). These were compared with the conventional polypropylene-clay nanocomposite. Results: The resulting composite shows about 42% increase in the modulus, 26.20% in the tensile strength and 13.30 Kj m-2 impact strength when compared with binary combination of PP/Clay nanocomposite. XRD patterns of PP/Clay and PP/Clay/MWCNT nanocomposites show different diffraction peaks which are indications of intercalation mixed with macromixing. Conclusion: This study showed that MWCNT can successfully address the common shortcomings peculiar to PP/Clay nanocomposite.
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