The Polytechnic

Ibadan, Nigeria

The Polytechnic

Ibadan, Nigeria
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Adesokan I.A.,UK Defence Science and Technology Laboratory | Ekanola Y.A.,The Polytechnic | Okanlawon B.M.,Ladoke Akintola University of Technology
African Journal of Microbiology Research | Year: 2010

In this study, influence of cultural conditions on hydrogen peroxide production by lactic acid bacteria was investigated. Leuconostoc mesenteroides produced the highest quantity (0.024 L) of hydrogen peroxide while Lactobacillus plantarum produced the lowest amount (0.016 g/L) in normal MRS. The effect of temperature on hydrogen peroxide production was determined and the result showed that Leuc. mesenteroides produced the highest quantity (0.024 g/L) at 30°C while L. brevis produced the lowest amount (0.012 g/L) of hydrogen peroxide at 45°C. Leuc. mesenteroides produced the highest amount of hydrogen peroxide (0.032 g/L) when mannitol was used as the carbon source while Lactobacillus delbrueckii and Lactobacillus fermentum produced the lowest amount (0.020 g/L) when glucose was used as the carbon source. Furthermore, Leuc. mesenteroides produced the highest amount of hydrogen peroxide (0.033 g/L) when potassium nitrate was used as the nitrogen source while L. fermentum and L. delbrueckii produced the lowest amount (0.020 g/L) when yeast extract was used as the nitrogen source. Hydrogen peroxide produced by Leuc. mesenteroides has the highest zone of inhibition against Pseudomonas aeruginosa while hydrogen peroxide produced by L. plantarum had the lowest zone of inhibition against Staphylococcus aureus. © 2010 Academic Journals.


Adeogun A.O.,University of Ibadan | Ibor O.R.,University of Ibadan | Omogbemi E.D.,University of Ibadan | Chukwuka A.V.,University of Ibadan | And 3 more authors.
Marine Environmental Research | Year: 2015

The high global occurrence of phthalates in different environmental matrixes has resulted in the detection of their metabolites in human urine, blood, and breast milk, indicating a widespread human exposure. In addition, the notorious endocrine disrupting effects of phthalates have shown that they mimic or antagonize the action of endogenous hormones, consequently producing adverse effects on reproduction, growth and development. Herein, we have studied the occurrence of phthalate esters (PEs) in water, sediment and biota of two lagoons (Epe and Lagos) in Nigeria. Two fish species (Tilapia guineensis, and Chrysichthys nigrodigitatus) and a crustacean (the African river prawn - Macrobrachium vollenhovenii) were analyzed for PEs levels using a HPLC method and the derived values were used for calculating bioconcentration factor (BCF), biota-sediment accumulation factor (BSAF) and phthalate pollution index (PPI) in the biota and environment. We observed that the growth and health condition of the fish species were normal with a k-factor of >1. Sediment PE levels were compared with water, at both lagoons showing concentration pattern that is characterized as DEHP=DEP>DBP. We observed that DBP was the predominant compound in T.guineensis, C.nigrodigitatus and African prawn, at both lagoons, showing organ-specific differences in bioconcentration (BCF and BSAF) patterns in the fish species. While there were no observed consistency in the pattern of PE concentration in fish organs, elevated DBP levels in different fish organs may be related to fish habitat and degradation level of phthalates. Low concentration of DEHP, compared with DBP and DEP, was measured in fish organs and whole prawn body. The BSAF values for DEHP were lowest, and highest for DBP for all species at both lagoons, and DEHP easily accumulated more in the sediment (sediment PPI=0.28 and 0.16 for Epe and Lagos lagoon, respectively). Overall, our findings suggest a broader environmental and human health implication of the high PE levels in these lagoons since they represent significant sources of aquatic food resources for the neighboring communities. © 2015 Elsevier Ltd.


Adeleke K.A.,The Polytechnic | Akinrinde E.A.,University of Ibadan
Journal of Agronomy | Year: 2011

Aluminum (Al) toxicity is a major limitation to leguminous crop production in acidic soils and fertilizer treatment could ameliorate the condition. In this study, direct and residual effects of fertilizers on the growth and yield of cowpea and soybean grown with or without Al treatment were evaluated on an alfisol. The investigation involved a greenhouse (2 kg soil/pot) experiment with two factors: Fertilizer types- (Control, Organic, Inorganic and Organomineral) and Al rates (0, 50, 100 μM A1C1 3) at the Agronomy Department, University of Ibadan, Nigeria. Treatment combinations were replicated three times in completely randomized design, giving 36 experimental units for each crop. Growth parameters (plant height and number of leaves) and biomass yield were determined and data Analyzed using ANOVA while treatment means were separated by Duncan's Multiple Range Test. High Al rate (100 μM) reduced growth and yield of the crops while moderate application (50 μM) enhanced their performance. Organomineral fertilizer promoted crops' performance better than the other fertilizer materials while the application of inorganic or organic fertilizers with 50 μM A1C1 3 proved most effective. Organic fertilizer had the highest residual effects equivalent to that of organomineral fertilizer applied with 50 μM A1C1 3 confirming that organic based fertilizers could be used to minimize the deleterious influence of Al toxicity on the production of these legumes in acid soils. © 2011 Asian Network for Scientific Information.


Ogunshe A.A.O.,University of Ibadan | Fawole A.O.,The Polytechnic | Ajayi V.A.,Biology and Microbiology Unit
Pan African Medical Journal | Year: 2010

Background: Cultural means of pediatric treatment during ill health is a mainstay in Africa, and though urine has been known to contain enteric pathogens, urine therapy is still culturally applicable in some health conditions and also advocated as alternative therapy. The study therefore, is to evaluate the microbial contents and safety of urine. Methods: Urinary bacteria from cows and healthy children aged 5-11 years were identified by conventional phenotypic methods and antimicrobial susceptibility testing was performed using modified agar disc and well-diffusion methods. Results: A total of 116 bacterial isolates (n = 77 children; n = 39 cows) were identified as Bacillus (10.4%; 5.1%)), Staphylococcus (2.6%; 2.6%), Citrobacter (3.9%; 12.8%), Escherichia coli (36.4%; 23.1%), Klebsiella (7.8%; 12.8%), Proteus (18.2%; 23.1%), Pseudomonas (9.1%; 2.6%), Salmonella (3.9%; 5.1%) and Shigella (7.8%; 12.8%) spp. Antibiotic resistance rates of the Gram-positive bacteria were high (50.0-100%), except in Bacillus strains against chloramphenicol, gentamicin and tetracycline (14.3%), while higher resistance rates were recorded among the Gram-negative bacteria except in Citrobacter (0.0%) and Proteus (8.5%) spp. against gentamicin and tetracycline respectively. The Gram-negative bacteria from ito malu (cow urine) were more resistant bacteria except in Citrobacter (20.0%) and Shigella spp. (0.0%) against tetracycline and Proteus spp. (11.1%), (22.2%) against amoxicillin and tetracycline respectively. Multiple antibiotic resistance (MAR) rates recorded in children urinal bacterial species were 37.5-100% (Gram-positive) and 12.5-100% (Gram-negative), while MAR among the cow urinal bacteria was 12.5-75.0% (Gram-positive) and 25.0-100% (Gram-negative). Similar higher resistance rates were also recorded among the Gram-negative bacterial species from urine specimens against the pediatric antibiotic suspensions. Conclusion: The study reported presence of multiple antibiotic-resistant indicator bacteria in human urine and ito malu used as alternative remedy in pediatric health conditions like febrile convulsion. © Adenike Adedayo O. Ogunshe et al.


PubMed | Information and Analysis Center and The Polytechnic
Type: Journal Article | Journal: Ergonomics | Year: 2017

A technique is proposed and evaluated for predicting the confusability of elements of an aural message transmitted by native English speakers against a noise background. The results suggest that a relatively simple comparison of the phonemic elements of a message with correspondingly located elements of other possible messages in a communication link allows a good prediction of potential confusions between correspondingly located segments of messages.


Olufunmilayo G.O.,The Polytechnic
The Pan African medical journal | Year: 2010

In recent times, food safety and security have generally remained basic human needs, therefore because of the largely unregulated nature of the Nigerian markets, coupled with the poor housing and feeding conditions to which animals are subjected in the abattoirs, a survey for assessing potential mycotoxin exposure through meat consumption was undertaken. Eighty Samples of meat bought randomly from 5 major markets distributed in 5 local government areas of Oyo state , Nigeria were analysed for contaminating mycoflora using the plate count and micromorphological methods, while aflatoxin detection and quantification was by Thin Layer Chromatography (TLC). Mycological analysis of samples revealed a higher contamination level in the sun-dried samples. Eighteen fungi species belonging to 8 genera, namely, Aspergillus, Penicilliu, Alternaria, Cladosporium, Fusarium, Neurospora, Rhizopus and yeast were identified. The predominant genus Aspergillus yielded 7 species while the potential toxicogenic fungi represented 38% of the isolated mycoflora. The genera requiring higher water activity for growth ( Alternaria, Fusarium and yeast) were not obtained from the dried meat. Aflatoxins B1, B2, G1 and G2 were detected in all the samples analysed. The fresh samples with the exception of the total aflatoxin G (AFG) in kidney gave the highest mean concentrations for all aflatoxins, also an exceptionally high aflatoxin content was found in all the kidney samples. Aflatoxin detection in meat should be addressed urgently to avert the possible adverse health effects like aflatoxicosis, exacerbated malnutrition, suppression of growth and immune functions on consumers. Also the animal health inspectors should pay more attention to the feeding conditions of the animals on farm and the abattoirs.


Oyero O.G.,The Polytechnic | Oyefolu A.B.,Lagos State University
Pan African Medical Journal | Year: 2010

Introduction: In recent times, food safety and security have generally remained basic human needs, therefore because of the largely unregulated nature of the Nigerian markets, coupled with the poor housing and feeding conditions to which animals are subjected in the abattoirs, a survey for assessing potential mycotoxin exposure through meat consumption was undertaken. Methods: Eighty Samples of meat bought randomly from 5 major markets distributed in 5 local government areas of Oyo state, Nigeria were analysed for contaminating mycoflora using the plate count and micromorphological methods, while aflatoxin detection and quantification was by Thin Layer Chromatography (TLC). Results: Mycological analysis of samples revealed a higher contamination level in the sun-dried samples. Eighteen fungi species belonging to 8 genera, namely, Aspergillus, Penicilliu, Alternaria, Cladosporium, Fusarium, Neurospora, Rhizopus and yeast were identified. The predominant genus Aspergillus yielded 7 species while the potential toxicogenic fungi represented 38% of the isolated mycoflora. The genera requiring higher water activity for growth (Alternaria, Fusarium and yeast) were not obtained from the dried meat. Aflatoxins B1, B2, G1 and G2 were detected in all the samples analysed. The fresh samples with the exception of the total aflatoxin G (AFG) in kidney gave the highest mean concentrations for all aflatoxins, also an exceptionally high aflatoxin content was found in all the kidney samples. Conclusion: Aflatoxin detection in meat should be addressed urgently to avert the possible adverse health effects like aflatoxicosis, exacerbated malnutrition, suppression of growth and immune functions on consumers. Also the animal health inspectors should pay more attention to the feeding conditions of the animals on farm and the abattoirs.


Adebayo A.,Cranfield University | Aremu B.,The Polytechnic
ARPN Journal of Engineering and Applied Sciences | Year: 2012

This paper is an outcome of the investigation of the effects of corrosion and synergistic actions of inhibitors on the fatigue properties of mild steel rods. The corrodents are saltwater and sulphuric acid while the inhibitors used are potassium chromate and 0.5M zinc oxide. The saltwater is sodium chloride solution containing approximately 3.5% weight of solute, prepared from 97.5% table salt; this approximates to the average salt concentration in quiet seawater. Mild steel water corroded in 0.5M H 2SO 4 was found to have shorter fatigue life (measured by number of cycles-to-failure) from those corroded in saltwater. Moreover, the fatigue life of specimens soaked in the corrodent in which both ZnO and K 2Cr 2O 7 (of equal proportion) were added was observed to have a longer fatigue life than the sample soaked in the corrodent with only K 2Cr 2O 7. However specimens with the corrodent of only ZnO displayed the least fatigue life. These findings therefore, shows that sulphuric acid has more corrosive action on mild steel than salt water and the corrosion inhibitor ability of K 2Cr 2O 7 (for mild steel) is more than that of ZnO while the mixture of K 2Cr 2O 7 and ZnO produce best corrosive inhibitor compared to those of the individual inhibitors. © 2006-2012 Asian Research Publishing Network (ARPN).


PubMed | The Polytechnic
Type: | Journal: The Pan African medical journal | Year: 2011

In recent times, food safety and security have generally remained basic human needs, therefore because of the largely unregulated nature of the Nigerian markets, coupled with the poor housing and feeding conditions to which animals are subjected in the abattoirs, a survey for assessing potential mycotoxin exposure through meat consumption was undertaken.Eighty Samples of meat bought randomly from 5 major markets distributed in 5 local government areas of Oyo state , Nigeria were analysed for contaminating mycoflora using the plate count and micromorphological methods, while aflatoxin detection and quantification was by Thin Layer Chromatography (TLC).Mycological analysis of samples revealed a higher contamination level in the sun-dried samples. Eighteen fungi species belonging to 8 genera, namely, Aspergillus, Penicilliu, Alternaria, Cladosporium, Fusarium, Neurospora, Rhizopus and yeast were identified. The predominant genus Aspergillus yielded 7 species while the potential toxicogenic fungi represented 38% of the isolated mycoflora. The genera requiring higher water activity for growth ( Alternaria, Fusarium and yeast) were not obtained from the dried meat. Aflatoxins B1, B2, G1 and G2 were detected in all the samples analysed. The fresh samples with the exception of the total aflatoxin G (AFG) in kidney gave the highest mean concentrations for all aflatoxins, also an exceptionally high aflatoxin content was found in all the kidney samples.Aflatoxin detection in meat should be addressed urgently to avert the possible adverse health effects like aflatoxicosis, exacerbated malnutrition, suppression of growth and immune functions on consumers. Also the animal health inspectors should pay more attention to the feeding conditions of the animals on farm and the abattoirs.


PubMed | The Polytechnic
Type: Journal Article | Journal: Clinical biomechanics (Bristol, Avon) | Year: 2013

A technique is described for assessing lumbar sagittal mobility, which distinguishes between the motion of the upper and lower lumbar regions. The method employs a draughtsmans flexible curve and requires the location of three specific spinal landmarks. Validation procedures were performed which show that the method is capable of recording regional sagittal mobility and correlates well with other methods. The intra- and inter-observer accuracy of the method was explored and the results show it to be reproducible to less than 9% for the same observer and 15% for different observers. The flexicurve technique is inexpensive and simple both to learn and to use.

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