Department of Biological Sciences
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- ItemMetamorphosis and Wing Formation in the Brown Plant Hopper, Nkparvafa lugens, After Topical Application of Precocene II(J. Wiley -Liss Inc., 1996) Ayoade, FemiIn the present paper the effects of precocene on N. lugens strains obtained by successive selection for adults with specific wing form under highly crowded conditions over 70 generations are reported. When precocene II was applied, macropterous adults developed from presumptive brachypters. Our results also demonstrated the disruptive effects of precocene I1 on metamorphosis, and we report here the induction of precocious metamorphosis in N. lugens in details for the first time. The sensitive periods to precocene 11, affccting wing dimorphism and metamorphosis, differed between the two strains.
- ItemFermentation of Cashew Juice using the Wine Yeast Strain NCYC 125 and three other Isolated Yeast Strains(Advance Food Science, 1999) Osho, Adeleke
- ItemEnhancement of short wing formation and ovarian growth in the genetically defined macropterous strain of the brown planthopper, Nilaparvata lugens(Elsevier Science Ltd, 1999) Ayoade, FemiWhen JH II, III or methoprene was applied in the nymphal stages to two different strains of the brown planthopper which were selected to produce long (macropterous) or short (brachypterous) wing forms, no effect was observed on the molting profile or metamorphosis. Brachypterization of a majority of the presumptive macropters was, however, observed by application of these chemicals, although there was no effect on wing form in the presumptive brachypters. The results show that the sensitive periods for the brachypterization of the presumptive macropters falls between early antepenultimate instar and within 1 or 2 days of the penultimate instar, and that the chemicals were effective, in the following order of potency: methoprene > JH III > JH II. Ovarian growth was greatly enhanced in the presumptive macropters when JH III or methoprene was applied twice, within 12 h of the 3rd or 4th nymphal instar and 6 h before adult emergence. JH II on the other hand had no effect on ovarian growth when applied to the presumptive macropters at any of the nymphal stages. None of the chemicals had any effect on ovarian growth in the presumptive brachypters.
- ItemBacteriology of some Well Water Samples in Warri: A Comparative Study(2001) Ogunlaja, Aemere
- ItemBacteriology of Water Samples in Apata, Ibadan(2008-05) Ogunlaja, Aemere
- ItemEvaluating the Efficiency of a Textile Wastewater Treatment Plant Located in Oshodi, Lagos(2009-09) Ogunlaja, Aemere
- ItemPalynological Evidence of Pliocene-Pleistocene Climatic Variations from the Western Niger Delta, Nigeria(International Journal of Botany, 6(4):351-370, 2010) Durugbo, Ernest Uzodimma
- ItemToxicological Impact of Water Sources within a Nigerian Petroleum Refinery Community on Albino Mice(2010-07) Ogunlaja, Aemere
- ItemAntimicrobial Activity of Ficus Leaf Extracts on Some Fungal and Bacterial Pathogens of Dioscorea rotundata from Southwest, Nigeria(Journal of Biological Sciences 11(5):359-366, 2011) Durugbo, Ernest Uzodimma
- ItemPreliminary Reports on Middle Miocene-Early Pleistocene Dinoflagellate Cysts from the Western Niger Delta, Nigeria(Ozean Journal of Applied Sciences, 4(4):373-394, 2011) Durugbo, Ernest UzodimmaFew published records of dinoflagellate cysts from the Middle Miocene – Early Pleistocene of the Niger Delta exist. Dinoflagellate cysts events could contribute to a wider use of palynological schemes. Their use in combination with pollen and spores will produce meaningful biostratigraphical schemes which will be useful where the other microfossils are scarce. Appreciable numbers of well preserved organic walled dinoflagellate cysts comprising 53 genera and 93 species were recovered from the analysis of 104, 100, 96 and 89 ditch cuttings of wells BA, BB, BC and BD from part of the Western Niger Delta. The ages ranged from Middle Miocene to Early Pleistocene (c.a 15.0Ma – 1.3Ma) based on the behaviour of pollen and spore marker species and confirmed with foraminiferal data. The samples were characterized by common records of peridiniaceans, especially in the Middle –Late Miocene. These occurred in association with common gonyaulacaceans such as Nematosphaeropsis labyrinthus, N. lemniscata, Sumatradinium spp., Lingulodinium machaerophorum, Operculodinium centrocarpum, Spiniferites ramosus, Spiniferites mirabilis, Hystrichokolpoma rigaudiae, Polysphaeridium zoharyi, Achomosphaera ramulifera, Achomosphaera andalousiensis, Tuberculodinium vancampoae, Impagidinium spp., Homotryblium spp., and spot occurrences of the older forms Dinogymnium eucalense, Muderongia spp., Odontochitina cf. costata, Wallodinium spp., Paleocystodinium golzowenze, Glaphyrocysta spp., and the acritarch Ascostomocystis potane indicating reworking. The occurrence of Achomosphaera andalousiensis is documented for the first time in the Niger Delta and its LDO close to the 11.6Ma promises to be notable event.
- ItemPalynology and Palaeoenvironments of Late Cretaceous Araromi Formation, Dahomey Basin, Nigeria(Asian Journal of Earth Sciences, 5(2):50-62, 2011) Durugbo, Ernest Uzodimma
- ItemIdentification and Functional Validation of the Novel Antimalarial Resistance Locus PF10_0355 in Plasmodium falciparum(2011-04-21) Happi, Christian
- ItemInteraction between Ciprofloxacin and Chloroquine in Mice Infected with Chloroquine Resistant Plasmodium berghei(2011-07-24) Happi, Christian