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Articles by B.C. Akin-Osanaiye
Total Records ( 3 ) for B.C. Akin-Osanaiye
  B.C. Akin-Osanaiye , H.C. Nzelibe and A.S. Agbaji
  The production of ethanol from Carica papaya (pawpaw) agricultural waste, using dried active bakers yeast strain (Sacchromyces cerevisiae) was investigated. The pawpaw fruit considered to be an agricultural waste was the tapped ripe pawpaw fruit harvested after the tapping of papain. The proximate composition, pH and the reducing sugar of the pawpaw fruit were determined. Effects of yeast concentration, duration of fermentation, pH, temperature and different yeast supplements as they relate to the optimization of the ethanol production were investigated. The fermented pawpaw fruit waste produced ethanol contents 2.82-6.60% (v/v). Proximate analyses of the dry fruit showed that pawpaw waste contain 90.82 g/100 g carbohydrate, 2.60 g/100 g lipid, 1.63 g/100 g crude protein, 4.95 g/100 g ash. The results of this work show that the rate of alcohol production through fermentation of pawpaw fruit waste by bakers yeast (Sacchromyces cerevisiae) increases with fermentation time and peaked at 72 h. It is also increased with yeast concentration at the temperature of 30°C. The optimum pH for fermentation is 4.5.
  B.C. Akin-Osanaiye , A.S. Agbaji and M.A. Dakare
  The antimicrobial potentials of essential oils and extracts from the leaves of Cymbopogon citratus (Lemon grass), Eucalyptus citriodora and Eucalyptus camadulensis were tested on Salmonella typhi, Staphylococcus aureous and Escherichia coli. Both the water extract and freeze dried extract of these leaves were used. Zone of inhibition measurement showed that Eucalyptus citriodora oil was very effective against Salmonella typhi and found to suppress growth of the organism after 24 h of incubation. Similar observation was made with a combined extract of Eucalyptus citriodora oil and lemon grass oil. Lemon grass oil was observed to possess high antimicrobial activity on all the three organisms tested while Eucalyptus camadulensis is very active against Staphylococcus aureus. Both the freeze dried extracts and the viscous extracts possess slight antimicrobial activity while in all cases, the aqueous extracts have no effects on the organisms.
  A.S. Agbaji , M.A. Dakare and B.C. Akin-Osanaiye
  The sensitivity potential of the bacteria Salmonella typhi and Staphylococcus aureus to Eucalyptus citrodora (Lemon) and Eucalyptus camadulensis (menthol) fractions was investigated. The whole extract samples were first evaluated for anti-microbial properties using the cup plate method. The whole oil extract samples showed high antimicrobial activity on the Salmonella typhi and Staphylococcus aureus. The whole extracts were then fractionated and each fraction was collected at its boiling point range. The sensitivity potential of the test organisms was then carried out in these fractions collected. The results obtained indicated that Salmonella typhi is highly sensitive to the fraction 3 (bpt) 152-154°C of Eucalyptus camaldulensis and moderately sensitive to all the other fractions of Eucalyptus camaldulensis. However all the fractions obtained from E. citrodora except fraction (I) and the residual extract were very effective on the Salmonella typhi. Meanwhile Staphylococcus aureus showed very high sensitivity to all the fractions obtained from the two whole extracts of E. citrodora and E. camadulensis.
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