7 results on '"Ernest Uzodimma Durugbo"'
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2. Pollen Characterization and Physicochemical Analysis of Six Nigerian Honey Samples; Test for Authenticity
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Ernest Uzodimma Durugbo, Mba Obasi Odim, Desmond Uchenna Abazuh, and Gabriel Gbenga Daramola
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Veterinary medicine ,Rubiaceae ,Combretaceae ,biology ,lcsh:S ,Acacia ,honey ,General Medicine ,Fabaceae ,medicine.disease_cause ,biology.organism_classification ,Elaeis guineensis ,lcsh:S1-972 ,physicochemical methods ,nigeria ,lcsh:Agriculture ,Pollen ,medicine ,Mimosoideae ,lcsh:Agriculture (General) ,Caesalpinioideae ,palynomorphs - Abstract
Honey is a popular product consumed for its health benefits. It is an effective antimicrobial an antioxidant agent. Globally, palynological and chemical methods are among the means of authenticating honey quality, geographical origin and floral origin. Six honey samples from six Nigerian towns (Abi, Ikom, Lokpanta, Nsukka, Okigwe and Shaki) were subjected to the aforementioned tests. Eighty-six pollen taxa were recorded in all the samples. The richest sample with seventy-three taxa was from Nsukka, followed successively by Okigwe, Lokpanta, Shaki, Ikom and Abi samples with sixty-eight, sixty-seven, sixty-two, fifty-nine and fifty-seven pollen species respectively. The oil palm Elaeis guineensis pollen dominated the samples in different proportions except Shaki honey dominated by Acacia spp., The commonest plant family was Fabaceae (Caesalpinioideae, Mimosoideae, Papilionideae) with twenty-one taxa followed by Euphorbiaceae, Combretaceae, with four representatives and Rubiaceae with three taxa each. The physico-chemical analysis carried out were total moisture, total ash content, colour assessment, percentage of total solids, relative density, acidity, and Fischer‘s Test. The samples were found to concur with the international standards for honey.
- Published
- 2020
3. Graphic correlation and paleoenvironmental investigation of the upper Eocene–lower Oligocene sediments in the Dahomey Basin, southwestern Nigeria: insights from palynomorphs
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Moshood Adegboyega Olayiwola, Ernest Uzodimma Durugbo, and Olugbenga Temitope Fajemila
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General Earth and Planetary Sciences ,General Agricultural and Biological Sciences - Abstract
This study presents the results of a comprehensive qualitative and quantitative palynological analysis of four shallow boreholes (Epe-1, Olokonla-1, Ikoyi-1 and Badore-1) in the lower Eocene–upper Oligocene periods of the Dahomey Basin, southwestern Nigeria. The lithostratigraphic analysis revealed three lithologies (sandy-shales, shaly-sands and sandstones). Two most important palynological zones, the Verrucatosporites usmensis, as well as the Magnastriatites howardi Pan-tropical zones, are delineated. First Appearance Datum (FAD) of Achomosphaera alcicornu marked the late Eocene–early Oligocene boundaries (E/O) within the four boreholes, while FAD of Adnatosphaeridium multispinosum defined the late Eocene–early Oligocene boundary (E/O) in Ikoy-1. Two informal palynological assemblage zones were revealed in the four boreholes. Common occurrences of palms, mangrove, fresh water and brackish water pollen, and pteridophyte spores with spots records of marine elements and algae species during marine invasion suggested fluctuation from fluvio-deltaic/nearshore to marginal marine paleoenvironments. Graphic correlation discloses that for every meter of sedimentary rock accretion within Epe-1, equally amounted to merely 0.31 m, 0.56 m, as well as 0.47 m of sediments, which were put down in Olokonla-1, Ikoyi-1, as well as Badore-1, respectively. These comparative rates of sedimentary rock accretion show with the purpose of either there is fewer attrition occurrence and/or extra accommodation gap within Epe-1 than Olokonla-1, Ikoyi-1, as well as Badore-1. The assessment of the slopes, intercept and correlation equations through graphic correlation procedures enable the identification of four biostratigraphic events in Epe-1, Olokonla-1, Ikoyi-1, as well as Badore-1. The findings in this investigation are necessary for depositional succession and paleoenvironmental understandings, as well as basin investigation, and above all, to show a relationship of broadly separated boreholes.
- Published
- 2022
4. Sequence stratigraphy of subsurface upper Eocene-lower Oligocene deposits, Dahomey Basin, Southwestern Nigeria: palynological and palynofacies approach
- Author
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Moshood Adegboyega Olayiwola, Moses Olaonipekun Oyebanjo, Olugbenga T. Fajemila, and Ernest Uzodimma Durugbo
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Sedimentary depositional environment ,Palynology ,Sequence (geology) ,Lithology ,Borehole ,Geochemistry ,General Earth and Planetary Sciences ,Sequence stratigraphy ,Structural basin ,Geology ,General Environmental Science ,Palynofacies - Abstract
This paper presents a sequence-stratigraphic interpretation from the lithologic data and palynological and palynofacies analyses of four shallow boreholes (Badore-1, Epe-1, Ikoyi-1, and Olokonla-1) within the upper Eocene-lower Oligocene interval of the Dahomey Basin. Three lithofacies, namely sandstones, shaly sands, and sandy shales were delineated. Sandstones and shaly sands could probably serve as reservoir rocks, while sandy shales could probably serve as source and seal rocks. Two major broad palynological zones were identified, i.e., the Verrucatosporites usmensis and Magnastriatites howardi Pan-tropical, which correlated to P500 and P400 zones. These zones were further subdivided into the P470 and P480, and P520 and P540 subzones. First occurrences (FOs) of Achomosphaera alcicornu, Homotryblium plectilum, and Adnatosphaeridium multispinosum and last appearance datum (LAD) of Homotryblium tenuispinosum were palynostratigraphic events that defined upper Eocene and lower Oligocene boundary in the four boreholes. Two and four depositional sequences were delineated in Epe-1 and Badore-1 boreholes, respectively, and three each were recorded in Olokonla-1 and Ikoyi-1 boreholes. Seven maximum flooding surfaces (38.8Ma, 37.5Ma, 36.5Ma, 35.0Ma, 32.0Ma, 29.0Ma, and 27.5Ma) and sequence boundaries (39.5Ma, 38.0Ma, 37.0Ma, 36.0Ma, 33.0Ma, 30.0Ma, and 28.4Ma) were identified in the four boreholes. The findings in this present study will be useful in understanding the significance of strata horizons and their respective ages, and system tracts sediment packages in the petroleum system.
- Published
- 2021
5. Candida (Diutina) mesorugosa in Non-Albicans Candida Species Clinical Isolates in South West Nigeria
- Author
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Philomena Eromon, Tosin Ogunbiyi, Toyin Abdulsalam, Oloche Owoicho, Folarin Onikepe, Christian T. Happi, Ernest Uzodimma Durugbo, and Judith U. Oguzie
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Hypha ,biology ,Non albicans candida ,Internal transcribed spacer ,Candida albicans ,biology.organism_classification ,Ribosomal DNA ,Yeast ,DNA sequencing ,Microbiology ,Candida rugosa - Abstract
IntroductionThe emerging role of non-albicans Candida species (NACS) as causal agents of mild to life-threatening mycoses is increasingly being appreciated. Some NACS are known for intrinsic resistance or reduced susceptibility to some antifungal drugs. To inform on therapeutic options and management of candidiasis, we embarked on Candida species surveillance in South west Nigeria.MethodWe obtained retrospective yeast isolates from urogenital samples of patients in a tertiary hospital in South west Nigeria. Among 47 isolates identified phenotypically, we encountered a yeast which failed to produce pseudohyphae in human serum but was morphologically similar to Candida albicans. We characterized this yeast by sequencing the internal transcribed spacer (ITS1-5.8S-ITS2) region of the ribosomal DNA.ResultsA BLAST search and sequence homology identified the yeast as Candida (Diutina)mesorugosa, with a strong bootstrap.ConclusionCandida mesorugosa, a rarely isolated yeast from clinical samples worldwide, should be considered among potentially relevant NACS in Nigerian clinics. To the best our knowledge, this is the first report of Candida mesorugosa from a clinical sample in Nigeria. This finding confirms the need for more specific methods, such as DNA sequencing, for extensive surveillance of NACS.
- Published
- 2020
6. Graphic correlation: A powerful tool for biostratigraphic correlation of petroleum exploration and production in the Cenozoic deep offshore Niger Delta, Nigeria
- Author
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Moshood Adegboyega Olayiwola, Ernest Uzodimma Durugbo, and Marion K. Bamford
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010506 paleontology ,Pleistocene ,Sediment ,Geology ,Biostratigraphy ,Structural basin ,010502 geochemistry & geophysics ,01 natural sciences ,Paleontology ,Erosion ,Sedimentary basin analysis ,Cenozoic ,0105 earth and related environmental sciences ,Earth-Surface Processes ,Marine transgression - Abstract
The graphic correlation method provides better and higher resolution to the stratigraphic problems than zonation biostratigraphy. The measured total stratigraphic ranges of 44 palynomorphs present in five wells from the Niger Delta Basin have been assembled by graphic correlation method into a chronostratigraphic framework. The analysis by graphic correlation reveals that for a meter of sediment accumulation in Well E, correspondingly amounted to only 0.8794 m, 0.7586 m, 0.8677 m and 0.8686 m of sediments that were deposited in wells A, B, C and D, respectively. These relative rates of sediment accumulation indicate that either there was less erosion taking place and/or more accommodation space in Well E than Wells A, B, C and D. A graphic correlation horizontal terrace was recorded in each of the Wells A, C and D, which are interpreted as condensation of sediments that had truncated the sediments accumulation profile in these wells. These condensed sections are interpreted as sediment starvation and very slow rates of sedimentation during the Early Pliocene, Late Pliocene and Late Pleistocene due to marine transgression(s) at these stages in the Niger Delta Basin. The generated correlation equations, slopes and intercept values from graphic correlation plots allow the correlation of six biostratigraphic and sedimentological events in Wells A, B, C, D and E. The resulting chronostratigraphic framework in this study is essential for sequence stratigraphic interpretations and basin analysis, and in particular, to correlate widely separated wells.
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- 2017
7. A survey of outdoor and indoor airborne fungal spora in the Redemption City, Ogun State, south-western Nigeria
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Ernest Uzodimma Durugbo, A. O. Kajero, E. I. Omoregie, and N. E. Oyejide
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Veterinary medicine ,Mucor plumbeus ,biology ,Pyrenochaeta ,Immunology ,Coniothyrium ,Plant Science ,biology.organism_classification ,Diplodia ,Bipolaris ,Curvularia ,Botany ,Immunology and Allergy ,Chrysosporium ,Cladosporium - Abstract
The concentration and biodiversity of airborne fungi of the Redemption City, an immense campground for Christian faithful and the temporary site of the Redeemer’s University in south-western Nigeria, was studied between February and May 2011 using the culture plate method. The study was undertaken to assess the concentrations of fungal spores and their health implication in this ever-busy environment. Fifteen different sites classified as closed or open were selected. During the experiment, a total of 228 colonies were counted, and 29 fungal species belonging to 26 genera were isolated which include the following: Aspergillus flavus, Aspergillus niger, Bipolaris spp., Chrysosporium spp., Cladosporium spp., Coniothyrium corda, Curvularia spp., Diplodia spp., Fusarium spp., Gliocladium spp., Monilia spp., Mucor spp., Mucor plumbeus, Penicillium spp., Phycomyces spp., Phytophthora spp., Pilobolus spp., Pyrenochaeta spp., Rhizopus stolonifer, Torula spp., Trichoderma spp. and Trichophyton spp. The most frequently occurring fungi were A. niger, C. corda and M. plumbeus, while the least recorded were Torula and Trichophyton species. Majority of the fungi isolated are known allergens; they could also be opportunistic causing various diseases in man. There is therefore a dire need for good sanitation practices within the studied areas of the camp.
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- 2012
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