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Articles by L. Lajide
Total Records ( 4 ) for L. Lajide
  A. Olonisakin , M.O. Oladimeji and L. Lajide
  The composition of the volatile oil from the fruits (berries) of Ashanti pepper (Piper guineense) was investigated using gas chromatography-mass spectrometry techniques. Out of 29 peaks (representing 99.2% of total oil), 27 components were identified representing 96.40% of the total oil composition. The major components were (1s)-(-1)-β-pinene (43.9%), D-Limonene (7.7%), caryophyllene (6.9%), car-2-ene (5.4%) and 1,6,10-dodecetrien-z-ol, 3, 7, 11-trimetyl (2.9%). The oil was also screened for its antibacterial activity against Escherichia coli, Serratia, Salmonella typhi, Klebsiella sp., Citrobacter and Pseudomonas aeruginosa. It was found out that it exhibited no activity against any of these organisms.
  A. Olonisakin , M.O. Oladimeji and L. Lajide
  Essential Oils from dry fruits of Xylopia aethiopica and Syzgium aromaticum were obtained by steam distillation, using a Clevenger-type system. The composition was determined by means of gas chromatography-mass spectrometry techniques using direct injection. The oils were also screened for antibacteria activity against E. coli, Serratia sp, Salmonella typhi, Klebsiella sp, citrobacter and Pseudomonas aeruginosa. The oil yields were 1.2 and 7.4% for Xylopia aethiopica and Syzgium aromaticum, respectively. The results showed that twenty three and three constituents representing 74 and 99.9% of the o ils were conclusively identified from X. aethiopica and S. aromaticum, respectively. ß-pinene 13.78%, ß-phelladrene, 12.36% gama-terpinene 7.66% and -pinene 5.56% as the major components of X. aethiopica and eugenol 93.7% for S. aromaticum. The two oils show demonstrated activity against tested organisms with S. aromaticum having higher activity than X. aethiopica at different concentrations.
  L. Lajide , M.O. Oseke and O.O. Olaoye
  Seedling of 5 species of legumes were analysed for their vitamin C, fibre, lignin and mineral contents using standard analytical techniques. Vigna sinensis (Oloyin), Vigna sinensis (Ife-brown), Vigna unguiculata (Mala), Vigna unguiculata (Sokoto) were analysed at day 7 and Cajanus cajan at day 14. The ascorbic acid contents were found to be 10.6, 26.4, 31.4, 34.6 and 38.4 mg/100 g, respectively; the fibre contents gave values of 22, 20, 20, 21.5 and 31%, while the lignin contents were 0.057, 0.062, 0.082 and 0.18%, respectively. The results of trace mineral analysis gave values ranging from 3.36-7.84 mg/100 g for calcium, 0.72-2.16 mg/100 g for copper, 5.40-18.00 mg/100 g for iron, 81.00-82.26 mg/100 g for potassium and 93.00 -123.60 mg/100 g for magnesium in the 5 species. The values obtained for potassium and magnesium were high for all the species.
  A. Olonisakin , M.O. Oladimeji and L. Lajide
  The toxicity and repellent effects of steam distilled oils of Ocimum suave, Piper guineese, Syzgium aromaticum and Xylopia aethiopica were evaluated against the cowpea bruchid (Callosobrochus maculatus) infesting stored cowpea seeds under prevailing storage conditions in middle belt of Nigeria. In toxicity test C. maculatus adults were exposed to 10 g of cowpea seeds (Vigna unguiculate) admixed with five dosages of each oil. While in the repellency tests adult bruchids were introduced onto test arenas (filter paper discs) treated with different dosages of each of the oil. Insecticidal oil were ranked in the order of decreasing toxicity as Syzgium aromaticum oil (LC50 = < 0.1 mg/10 g seed) > Xylopia aethopica oil (LC50 = 0.485 mg/10 g seed > Piper guineese oil (LC50 = 0.510 mg/100 g seed) > Ocimum shave oil (LC50 0.660 mg/10 g seed). Significantly higher proportion of C. maculates adults were repelled from filter paper discs treated with all plant oils with average means repellent order of 60.24, 77.87, 80.23 and 86.66% for Xylopia aethiopica, Piper guineese, Syzguim aromaticum and Ocimum suare, respectively.
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