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Articles by O. Sulaiman
Total Records ( 2 ) for O. Sulaiman
  F.Y. Daramola , J.O. Popoola , A.O. Eni and O. Sulaiman
  Vegetable crops are highly susceptible to a wide range of pests and diseases among which are the root-knot nematodes (Meloidogyne species). Traditionally, identification of Meloidogyne species had been based on use of morphological characters such as the perennial pattern. In recent times, accuracy of nematode identification using only morphological tools has been challenged due to similarities in morphological characters of some nematode species. The aim of this study was to identify the root-knot nematodes associated with some vegetable crops cultivated on Covenant University farm, Ota, South-west, Nigeria using molecular tools and to determine the population densities of Meloidogyne spp. on the selected vegetable crops. Plant-parasitic nematodes were extracted from soil and roots of Abelmoschus esculentus, Celosia argentea and Corchorus olitorius cultivated on Covenant University farm. The nematode species were identified and counted under a compound microscope. The molecular characterization of the Meloidogyne species was done using single adult female nematodes and eggs which were picked out for DNA extraction and amplified with specie-specific primers through Polymerase Chain Reaction (PCR) and separated on 0.5% agarose gel. High population of plant- parasitic nematodes was recorded on the vegetable crops cultivated on covenant university farm. Also significantly higher population (p<0.005) of Meloidogyne spp. were found in association with C. argentea and Corchorus olitorius than those recorded on Abelmoschus esculentus from the vegetable farm. The molecular characterization of the Meloidogyne species from the farm indicates Meloidogyne incognita as the nematode species associated with the vegetable crops.
  O. Sulaiman , R. Hashim , R.N. Kumar , P. Tamyez , R.J. Murphy and Z. Ali
  The aim of the study is to investigate the effect of incorporation of flame retardants chemical on some of the properties of phenol formaldehyde medium density fiberboard. Flame retardant chemicals that were used include sodium aluminate, zinc borate and aluminum trihydrate. Four concentrations levels, 10, 15, 20 and 30% of the flame retardants and 15% phenol formaldehyde resin based on oven dry weight were used to manufacture the experimental panels. The effect on physical and mechanical properties were then evaluated. Flame retardant and thermal properties of the panels were also investigated using a cabinet test method, thermogravimetry analysis and differential scanning calorimetry. Thickness swell decreased as the amount of the flame retardants increased while the mechanical properties decreased as the amount of flame retardants increased except for the modulus of rupture. The mechanical properties reduced considerably after cyclic tests. The boards incorporated with aluminum trihydrate gave an overall best performance in both physical and mechanical properties followed by sodium aluminate and zinc borate. The study indicated flame retardant MDF incorporated with sodium aluminate as the most effective flame retardant.
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