Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2020 ( 24 )

2019 ( 346 )

2018 ( 338 )

2017 ( 340 )

Custom range...

Search Results: 1 - 10 of 198323 matches for " N. Yakubu "
All listed articles are free for downloading (OA Articles)
Page 1 /198323
Display every page Item
Prevalence of Organophosphorous Pesticide Residues in Pumpkin, Spinach and Sorrel Leaves Grown in Akwanga, Nasarawa State, Nigeria  [PDF]
E. G. Ibrahim, N. Yakubu, L. Nnamonu, J. M. Yakubu
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.95032
Abstract: Three green leafy vegetable samples of pumpkin leaves, spinach leaves, and sorrel leaves were collected from three different locations in a farm in Akwanga and were tested for the presence of organophosphorus (OP) compounds. The concentrations of all the pesticide residues in the vegetable samples were determined using gas chromatography with mass spectrometry (GC-MS). The organophosphorus pesticides detected include carbaryl (0.052 mg/kg) in pumpkin, this is below European maximum residues limit (EU MRL) of 0.1 mg/kg, Dimethoate was found in pumpkin (0.165 mg/kg), spinach (0.103 mg/kg) and sorrel (0.250 mg/kg) all above the EU MRL of 0.05 mg/kg. Dichlofenthion was detected in pumpkin (0.308 mg/kg), pirimiphos methyl was detected in pumpkin and spinach (0.428 mg/kg and 0.149 mg/kg respectively), all these were below the EU MRL of 0.5 mg/kg. Chlorpyrifos was found in spinach (0.230 mg/kg) and sorrel (0.192 mg/kg) only spinach was above the EU MRL of 0.2 mg/kg. The pesticide residue Bromophosethyl was detected in all vegetables, pumpkin leaves (0.501 mg/kg), sorrel (1.571 mg/kg) and spinach (7.981 mg/kg) all above the EU MRL of 0.5 mg/kg. The remaining pesticides detected were all below their EU MRL value; these are Ethion found in spinach (0.167 mg/kg), Methyl Parathion in spinach (0.103 mg/kg) and sorrel (0.335 mg/kg). The levels of some of the organophosphorus pesticide residues found in vegetables were above the maximum residue limits (MRLs) set by the European Union. This calls for laws to regulate the use and circulation of such chemicals. Based on the observation made in these studies, it is proposed that more extensive monitoring investigation covering all vegetables part in Akwanga Nasarawa state be carried out to find the exact position of pesticide residues.
Determination of Organochlorine Pesticide Residues in Pumpkin, Spinach and Sorrel Leaves Grown in Akwanga, Nasarawa State, Nigeria  [PDF]
E. G. Ibrahim, N. Yakubu, L. Nnamonu, J. M. Yakubu
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.95031
Abstract: Three green leafy vegetable samples of pumpkin leaves, spinach leaves, and sorrel leaves were collected from a farm in Akwanga and were tested for the presence of residues of organochlorine pesticides. The concentrations of all the pesticide residues in the vegetable samples were determined using GC/MS. Among the organochlorine pesticide p,p’-DDT was detected in pumpkin (0.75 mg/kg), spinach (0.319 mg/kg) and sorrel (0.219 mg/kg). θ-BHC and γ-BHC were detected only in pumpkin leaves (0.359 mg/kg and 0.647 mg/kg respectively). Dieldrin was detected in spinach and sorrel (0.124 mg/kg and 0.053 mg/kg respectively). Endrin was detected in pumpkin (0.732 mg/kg) and Aldrin in sorrel (0.095 mg/kg). All these values were above the maximum residue limit (MRL) value of the pesticides. Endosulfan II was detected in sorrel (0.306 mg/kg) below the MRL. The levels of most of the pesticide residues found in vegetables were above the maximum residue limits (MRLs) that call for laws to regulate the use and circulation of such chemicals. Routine monitoring of pesticide residues in this study area is necessary for the prevention, control and reduction of environmental pollution, to minimize health risks.
Assessment of Genetic Relationship and Application of Computational Algorithm to Assess Functionality of Non-Synonymous Substitutions in DQA2 Gene of Cattle, Sheep and Goats  [PDF]
Steven B. Ugbo, Abdulmojeed Yakubu, Jude N. Omeje, Bwaseh S. Bibinu, Ibrahim S. Musa, Joseph O. Egahi, N. I. Dim
Open Journal of Genetics (OJGen) , 2015, DOI: 10.4236/ojgen.2015.54011
Abstract: The major histocompatibility complex (MHC) is a fundamental part of the immune system in nearly all vertebrates. DQA2 is a member of the MHC complex and an important candidate gene involved in susceptibility/resistance to various diseases. Therefore, the present study aimed at investigating computationally molecular genetic variation of DQA2 gene of cattle, sheep and goats especially on its evolution and differentiation within and among species as well as the attendant effects of the polymorphism on the function of DQA2 gene. A total of thirty three DQA2 nucleotide sequences comprising cattle (10), sheep (12) and goats (11) were retrieved from the GenBank. Forty seven amino acid substitutions of the wild type alleles located in the putative peptide coding region of caprine DQA2 alleles were obtained from the alignment of deduced amino acid sequences of goats. Out of these, eleven amino acid substitutions (H14L, H14R, L34M, E35L, G56S, G56R, 161V, A62E, D69Q, T72N and T72G) were returned neutral; an indication that they did not impair protein function. The Expected Accuracy (EA) ranged from 53% - 87%. For sheep, sixteen amino acid substitutions (A11P, A11T, A11G, A11M, L14S, L14T, V27L, V27S, G35S, S46T, D55E, L57T, L57A, L57G, K65Q and V68I) appeared beneficial while the rest forty seven appeared harmful (EA ranged from 53% - 93%). Twenty four amino acid substitutions did not impair the function of protein while seventy seven substitutions appeared to have a negative effect on the function of protein of cattle (EA ranged from 53% - 94%). The phylogeny based on nucleotide and amino acid sequences of DQA2 gene revealed the close relatedness of the caprine, ovine and bovine species. The present knowledge would be relevant for performing further genotype-phenotype research as well as pharmacogenetics studies in order to show association between caprine, ovine and bovine DQA2 allelic variation and the clinical progression of infectious diseases especially in a developing country such as Nigeria.
Prevalence of adolescent hypertension in Zaria
M A Bugaje, AM Yakubu, W N Ogala
Nigerian Journal of Paediatrics , 2005,
The Food of Quelea Birds (Quelea quelea) During Dry Season in Borno State, Nigeria
S.D. Yusufu,Y. Yakubu,B.N. Madziga
Pakistan Journal of Biological Sciences , 2004,
Abstract: The plant species that formed the food of Quelea birds in Borno State of Nigeria during the dry season was investigated, using 50 birds. The birds were caught from the wild using some local trapping techniques with a view to finding out if Quelea birds fed more on cultivated than uncultivated crops, therefore constituting a threat to man. Each bird was dissected using a scalpel blade on dorsal recumbency to remove the crop. The crop was then cut open and the contents removed and identified. The results revealed that the birds fed more on wild grass (uncultivated) seeds (Triticum aestevum, 49.3%; Echinochloa colonum, 3.5%; and Oryza barthii, 0.9%) than cultivated crops (Pennisetum glaucum, 44.8%; and Sorghum vulgare, 1.1%)
Evaluating the Role of Shelterbelt in Vegetation Development in a Semi Arid Zone of Yobe State, Nigeria  [PDF]
Bulus Luka Gadiga, Yakubu Dan
Journal of Geographic Information System (JGIS) , 2015, DOI: 10.4236/jgis.2015.75043
Abstract: This study evaluates the role of shelterbelts on the development and dynamics of vegetation in relation to livelihoods in the study area using geo-information techniques. The study covered the period between 1972 and 2007. The results show that in 1972 vegetation cover in the study area extended over an area of 6955 hectares (i.e.shrubs, grasses and trees) which represents 65% of the area; however there was a decrease in 1986 to an area of 5779 hectares (54%). Despite the establishment of shelterbelt in the area in 1987, the trend did not change. This is obvious in the reduction of vegetation cover between 1986 and 2000 to a total area of 3893 hectares (37%). The vegetation cover further decreased to 2791 hectares (26%) in 2005 and 1659 hectares (16%) in 2007 respectively. The study concludes that the establishment of shelterbelts alone cannot guarantee the success of vegetation cover development in the area without a sustainable plan which recognizes the local communities as critical stakeholders. Thus, variables like population growth and GDP have a role to play in vegetation cover depletion. The study recommends that efforts geared towards enlightenment of the local communities on the need for conservation should be encouraged by Government and Non-Governmental Organisations.
Enterovesical Fistula Complicating Myomectomy: A Case Report  [PDF]
K. C. Ekwedigwe, I. Sunday-Adeoye, S. Lengman, M. E. Isikhuemen, A. B. C. Daniyan, E. N. Yakubu, M. O. Eliboh, I. E. A. Uguru
Open Journal of Urology (OJU) , 2017, DOI: 10.4236/oju.2017.74010
Abstract: Background: Enterovesical fistula is an abnormal communication between the bladder and the gastrointestinal tract. It is an uncommon type of genital fistula, occasionally complicating pelvic surgeries. However, it is the most common type of fistula associated with diverticular disease of the colon. Other causes include cancer, trauma and iatrogenic injuries. Pneumaturia and fecaluria usually implies enterovesical fistula. Enterovesical fistula complicating myomectomy is an uncommon finding. Our aim is to report a case of enterovesical fistula following myomectomy. Case presentation: She is a 33-year-old nullipara who presented at the National Obstetric Fistula Centre, Abakaliki, Ebonyi State, South-Eastern Nigeria with a history of fecaluria, pneumaturia and haematochezia which started after myomectomy. Feculent fluid was obtained on urethral catheterization. Cystography was suggestive of enterovesical fistula. Conclusion: Enterovesical fistula is a possible complication of myomectomy. A high index of suspicion for this rare but potentially devastating condition is important for early diagnosis and appropriate management.
Discriminant analysis of sexual dimorphism in morphological traits of African Muscovy ducks
Archivos de Zootecnia , 2011,
Abstract: sexual dimorphism was examined in 221 randomly selected adult african muscovy ducks extensively reared in north central nigeria using univariate and multivariate measures of body size and skeletal proportions. the body parameters investigated included body weight, 8 primary linear body measurements [breast circumference (btc), thigh circumference (thc), body length (bdl), bill length (bll), neck length (nkl),foot length (ftl), total leg length (tll) and wing length (wnl)] and 4 morphological indices (massiveness, stockiness, long-leggedness and condition index). the univariate analysis showed male dominance (p<0.05) in all the morphometric measurements, with the exception of stockiness and longleggedness where significantly higher mean values were recorded for females. low, moderate and high positive and negative correlations among the body size and shape characters of the ducks were recorded. the canonical discriminant analysis on body weight and primary linear body measurements revealed that wing length was the most discriminating variable between the sexes, followed by body weight, neck circumference, total leg length, body length and foot length respectively. three other variables not qualified to enter the model were expunged. the single discriminant function obtained (d= -3.116 + 0.280wnl+ 0.921bwt + 0.191nkl - 0.196tll 0.063bdl - 0.283ftl) correctly classified 91.4% of individuals of known-sex ducks. this might aid in ecological studies, conservation and improvement of the indigenous ducks.
Towards Content Development For Institutional Digital Repository
F Yakubu
Information Manager (The) , 2009,
Abstract: The growth in Information and Communication Technology has lead to the emergence of Institutional Digital Repository, a digital archive for the preservation and dissemination of institutional research outputs. Institutional Digital Repositories make possible global dissemination of research outputs through the use of the Internet. This paper discusses the concept of IDR, types, content, content development and highlighted the benefits of submitting electronic research work to IDR stakeholder to store, preserve and disseminate research work generated within an institution.
Biological approach to oil spills remediation in the soil
MB Yakubu
African Journal of Biotechnology , 2007,
Abstract: Perhaps there is no any other raw material that has impacted so much, and found wide application on human civilization than petroleum hydrocarbon (PHC). The paradox is that it is this same black gold that threatens human environment. PHC pollution in the environment, as well as the importance of natural interactions amongst living entities to arrest the problems hitherto caused by oil spills are hereby examined. Biological approaches to pollution remediation, which include phytoremediation, bioremediation, and application of biosurfactant, are discussed. Two angles of approach to bioremediation of PHC spills in the soil are identified; the bioaugmentation and biostimulation. The use of surfactants of microbial origin has been found to be environmentally friendly, naturally selective and stable at elevated temperatures, PH and salt concentration. Similarly, genetic methods have been found to be overwhelmingly promising in detecting as well as assessing PHC soil pollution, and clean up.
Page 1 /198323
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.