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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 426 journals)
Showing 1 - 200 of 265 Journals sorted alphabetically
AAS Open Research     Open Access   (Followers: 1)
ABC Journal of Advanced Research     Open Access  
Accountability in Research: Policies and Quality Assurance     Hybrid Journal   (Followers: 22)
Acta Materialia Transilvanica     Open Access  
Acta Nova     Open Access   (Followers: 1)
Acta Scientifica Malaysia     Open Access  
Acta Scientifica Naturalis     Open Access   (Followers: 3)
Adıyaman University Journal of Science     Open Access  
Advanced Science     Open Access   (Followers: 13)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 11)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advances in Research     Open Access  
Advances in Science and Technology     Full-text available via subscription   (Followers: 17)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 8)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 2)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 4)
American Academic & Scholarly Research Journal     Open Access   (Followers: 6)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Humanities and Social Sciences     Open Access   (Followers: 17)
American Scientist     Full-text available via subscription   (Followers: 13)
ANALES de la Universidad Central del Ecuador     Open Access   (Followers: 4)
Anales del Instituto de la Patagonia     Open Access  
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 1)
Apuntes de Ciencia & Sociedad     Open Access  
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives Internationales d'Histoire des Sciences     Partially Free   (Followers: 7)
Archives of Current Research International     Open Access  
ARO. The Scientific Journal of Koya University     Open Access   (Followers: 1)
ARPHA Conference Abstracts     Open Access   (Followers: 5)
ARPHA Proceedings     Open Access   (Followers: 5)
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access   (Followers: 1)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Journal of Advanced Research and Reports     Open Access   (Followers: 2)
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 2)
Asian Journal of Scientific Research     Open Access   (Followers: 3)
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 7)
Australian Field Ornithology     Full-text available via subscription   (Followers: 4)
Australian Journal of Social Issues     Hybrid Journal   (Followers: 7)
Avrasya Terim Dergisi     Open Access  
Bangladesh Journal of Scientific Research     Open Access   (Followers: 1)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
Berichte Zur Wissenschaftsgeschichte     Hybrid Journal   (Followers: 10)
Berkeley Scientific Journal     Full-text available via subscription  
BIBECHANA     Open Access   (Followers: 2)
BibNum     Open Access  
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Bioethics Research Notes     Full-text available via subscription   (Followers: 16)
Bistua : Revista de la Facultad de Ciencias Básicas     Open Access  
BJHS Themes     Open Access   (Followers: 1)
Black Sea Journal of Engineering and Science     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Bulletin de la Société Royale des Sciences de Liège     Open Access  
Bulletin of the National Research Centre     Open Access  
Butlletí de la Institució Catalana d'Història Natural     Open Access  
Central European Journal of Clinical Research     Open Access  
Chain Reaction     Full-text available via subscription  
Ciencia & Natura     Open Access   (Followers: 1)
Ciencia Amazónica (Iquitos)     Open Access   (Followers: 1)
Ciencia en Desarrollo     Open Access   (Followers: 3)
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia Ergo Sum     Open Access  
Ciência ET Praxis     Open Access  
Ciencia y Tecnología     Open Access  
Ciencia, Docencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 2)
CienciaUAT     Open Access   (Followers: 1)
Citizen Science : Theory and Practice     Open Access   (Followers: 2)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Applied Sciences     Open Access  
Comprehensive Therapy     Hybrid Journal   (Followers: 3)
Comunicata Scientiae     Open Access   (Followers: 1)
ConCiencia     Open Access  
Conference Papers in Science     Open Access   (Followers: 2)
Configurations     Full-text available via subscription   (Followers: 11)
COSMOS     Hybrid Journal   (Followers: 1)
Crea Ciencia Revista Científica     Open Access   (Followers: 2)
Cuadernos de Investigación UNED     Open Access  
Current Issues in Criminal Justice     Hybrid Journal   (Followers: 15)
Current Research in Geoscience     Open Access   (Followers: 8)
Dalat University Journal of Science     Open Access  
Data     Open Access   (Followers: 5)
Data Curation Profiles Directory     Open Access   (Followers: 5)
Dhaka University Journal of Science     Open Access  
Dharmakarya     Open Access  
Diálogos Interdisciplinares     Open Access  
Digithum     Open Access   (Followers: 2)
Discover Sustainability     Open Access   (Followers: 2)
Einstein (São Paulo)     Open Access  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Emergent Scientist     Open Access  
Enhancing Learning in the Social Sciences     Open Access   (Followers: 9)
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Entramado     Open Access  
Entre Ciencia e Ingeniería     Open Access   (Followers: 1)
Epiphany     Open Access   (Followers: 4)
Estação Científica (UNIFAP)     Open Access   (Followers: 1)
Ethiopian Journal of Education and Sciences     Open Access   (Followers: 6)
Ethiopian Journal of Science and Technology     Open Access  
Ethiopian Journal of Sciences and Sustainable Development     Open Access   (Followers: 5)
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 12)
European Scientific Journal     Open Access   (Followers: 12)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Exchanges : the Warwick Research Journal     Open Access   (Followers: 2)
Experimental Results     Open Access   (Followers: 1)
Extensionismo, Innovación y Transferencia Tecnológica     Open Access   (Followers: 3)
Facets     Open Access  
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access   (Followers: 1)
Fırat University Turkish Journal of Science & Technology     Open Access  
Fontanus     Open Access  
Forensic Science Policy & Management: An International Journal     Hybrid Journal   (Followers: 381)
Frontiers for Young Minds     Open Access  
Frontiers in Climate     Open Access   (Followers: 3)
Frontiers in Science     Open Access   (Followers: 1)
Fundamental Research     Open Access   (Followers: 3)
Futures & Foresight Science     Hybrid Journal   (Followers: 4)
Gaudium Sciendi     Open Access   (Followers: 1)
Gazi University Journal of Science     Open Access  
Ghana Studies     Full-text available via subscription   (Followers: 15)
Global Journal of Pure and Applied Sciences     Full-text available via subscription  
Global Journal of Science Frontier Research     Open Access   (Followers: 2)
Globe, The     Full-text available via subscription   (Followers: 4)
HardwareX     Open Access  
Heidelberger Jahrbücher Online     Open Access  
Heliyon     Open Access  
Himalayan Journal of Science and Technology     Open Access   (Followers: 1)
History of Science and Technology     Open Access   (Followers: 2)
Hoosier Science Teacher     Open Access  
Iberoamerican Journal of Science Measurement and Communication     Open Access  
Impact     Open Access   (Followers: 2)
Indian Journal of History of Science     Hybrid Journal   (Followers: 2)
Indonesian Journal of Fundamental Sciences     Open Access  
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 4)
Indonesian Journal of Science and Technology     Open Access  
Ingenieria y Ciencia     Open Access   (Followers: 1)
Innovare : Revista de ciencia y tecnología     Open Access  
Instruments     Open Access  
Integrated Research Advances     Open Access  
Interciencia     Open Access   (Followers: 1)
Interface Focus     Full-text available via subscription  
International Annals of Science     Open Access  
International Archives of Science and Technology     Open Access  
International Journal of Academic Research in Business, Arts & Science     Open Access   (Followers: 2)
International Journal of Advanced Multidisciplinary Research and Review     Open Access  
International Journal of Applied Science     Open Access  
International Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
International Journal of Computational and Experimental Science and Engineering (IJCESEN)     Open Access  
International Journal of Culture and Modernity     Open Access   (Followers: 3)
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Engineering, Technology and Natural Sciences     Open Access  
International Journal of Innovation and Applied Studies     Open Access   (Followers: 12)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 6)
International Journal of Network Science     Hybrid Journal   (Followers: 3)
International Journal of Recent Contributions from Engineering, Science & IT     Open Access   (Followers: 1)
International Journal of Research in Science     Open Access   (Followers: 2)
International Journal of Science & Emerging Technologies     Open Access   (Followers: 1)
International Journal of Social Sciences and Management     Open Access   (Followers: 3)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 7)
International Letters of Social and Humanistic Sciences     Open Access   (Followers: 1)
International Review of Applied Sciences     Open Access  
International Scientific and Vocational Studies Journal     Open Access   (Followers: 2)
InterSciencePlace     Open Access   (Followers: 1)
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Investigación Valdizana     Open Access  
Investigacion y Ciencia     Open Access   (Followers: 1)
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
iScience     Open Access   (Followers: 2)
Issues in Science & Technology     Free   (Followers: 7)
Ithaca : Viaggio nella Scienza     Open Access  
J : Multidisciplinary Scientific Journal     Open Access  
Jaunujų mokslininkų darbai     Open Access   (Followers: 1)
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription   (Followers: 2)
Journal of Chromatography & Separation Techniques     Open Access   (Followers: 12)
Journal of Advanced Research     Open Access   (Followers: 3)
Journal of Al-Qadisiyah for Pure Science     Open Access   (Followers: 1)
Journal of Alasmarya University     Open Access   (Followers: 3)
Journal of Analytical Science & Technology     Open Access   (Followers: 6)
Journal of Applied Science and Technology     Full-text available via subscription   (Followers: 1)
Journal of Applied Sciences and Environmental Management     Open Access   (Followers: 3)
Journal of Big History     Open Access   (Followers: 3)
Journal of Composites Science     Open Access   (Followers: 3)
Journal of Critical Thought and Praxis     Open Access   (Followers: 2)
Journal of Deliberative Mechanisms in Science     Open Access  
Journal of Diversity Management     Open Access   (Followers: 6)
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Institute of Science and Technology     Open Access  
Journal of Integrated Science and Technology     Open Access  
Journal of Interaction Science     Open Access   (Followers: 1)
Journal of Kerbala University     Open Access   (Followers: 1)
Journal of King Saud University - Science     Open Access   (Followers: 1)
Journal of Mathematical and Fundamental Sciences     Open Access  
Journal of Natural Sciences and Mathematics Research     Open Access  
Journal of Natural Sciences Research     Open Access   (Followers: 4)
Journal of Negative and No Positive Results     Open Access  
Journal of Responsible Technology     Open Access   (Followers: 1)
Journal of Science (JSc)     Open Access  
Journal of Science and Engineering     Open Access  

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Journal of Applied Sciences and Environmental Management
Number of Followers: 3  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1119-8362
Published by African Journals Online Homepage  [263 journals]
  • Chromosomes Behavior at Meiosis in Chlorophytum stenopetalum Bak at
           Pachytene, Diakinesis and Diplotene

    • Authors: Omokanye Babatunde Sikiru
      Pages: 493 - 496
      Abstract: Meiotic prophase is classically subdivided into five stages: leptotene,  zygotene, pachytene, diplotene, and diakinesis. The objective of this paper is to evaluate the behaviours of Chromosomes in Chlorophytum stenopetalum Bak.at pachytene /diakinesis and metaphase. The flower buds at right age  were harvested, fixed in Cornoy’s solution (3 part of absolute alcohol and 1 part of acetic alcohol) and preserved in a refrigerator at -4°ð¶ for at least thirty minutes. The flower buds were then hydrolyzed in 10% HCl for 3-5 minutes. Prepared slides were viewed using an Armscope microscope equipped with digital automatic camera. At diakinesis seven bivalents (7 II) were   predominantly observed (74.2%). Chromosomal stickiness is quite evidence. In addition, cross configuration and its resultant, ring formation at metaphase indicate the presence of translocation heterozgosity in the chromosomes of the species investigated. These abnormalities are likely to affect  microsporogenesis and pollen viability.
      PubDate: 2021-10-07
      DOI: 10.4314/jasem.v25i4.
      Issue No: Vol. 25, No. 4 (2021)
       
  • In-silico Investigation of the Interaction between Beta-class Glutathione
           S-Transferase and Five Antibiotics, namely; Ampicillin, Tetracycline,
           Chloramphenicol, Ciprofloxacin and Cephalexin

    • Authors: D. Shehu, S Danlami, M. Ya’u, A. Babandi, H.M. Yakasai, K. Babagana
      Pages: 497 - 502
      Abstract: Glutathione s-transferases(GSTs) are enzymes involved in the conjugation and deactivation of various xenobiotics including drugs. Thisin-silico study was undertaken in order to investigate the interaction between beta-class glutathione s-transferase and five selected antibiotics, namely; ampicillin, tetracycline, chloramphenicol, ciprofloxacin and cephalexin using molecular docking study. RaptorX server was used to predict the amino acids involved at the binding sitewhile molecular docking study was employed in order to investigate the binding interactions.RaptorX predicted several amino acids which were different from the ones observed in molecular docking because of the variability in the substrate binding site of GSTs however, all the amino acids predicted by RaptorX were also found to be involved in the GSH binding.Lys107, Phe109, Ser110, Leu113, Trp114, His115 and Arg123, Leu168 were the amino acids involved in the binding of various antibiotics to the substrate binding site of the protein while Ala9, Cys10, Leu32, Tyr51, Val52, Pro53, Glu65 and Ala66were involved in the binding of the co-substrate GSH to the binding site of the protein. The results indicated that all the antibiotics showed a good binding affinity with the beta class GST and are therefore capable of deactivating the drugs. With these, finding a beta class GST inhibitors alongside antibiotics during a treatment of diseases will be of beneficial in the current fight against antibiotic resistance.
      PubDate: 2021-10-07
      DOI: 10.4314/jasem.v25i4.2
      Issue No: Vol. 25, No. 4 (2021)
       
  • Comparative Study of Conventional and Water Circulating-Heat Sink Cooling
           Base Thermoelectric Generator System for Optimum Solar Thermal Waste Heat
           Recovery

    • Authors: A. Yusuf, M.H. Ali
      Pages: 503 - 509
      Abstract: A novel technique for waste heat recovery in solar thermal power generation is investigated through experimentation and  systematically presented. Power generation using Thermoelectric Generator (TEG) is a promising technique in waste heat recovery application. In this topology, TEG array is directly attached to the back of the solar Photovoltaic panel (model AP-AM15) to receive the transmitted heat at the back of the PV panel as waste heat. More so, a circulating water-heat sink is attached to the TEG cold side to improve the temperature gradient. Base on Seebeck effect, the TEG directly converts the temperature difference into electricity. The experimental result shows that efficiency between the range of 2.1% and 4.7% for the conventional cooling system while the output power approximately ranges between 0.05W and 0.47W, the circulating water-heat sink technique has efficiency ranging between 2.9% and 10.3% with output power between the range of 0.10W and 2.2W. The daily average increase in efficiency was found to be 263.76%. This shows that the daily average power is improved by a factor of 2.6376 with the water circulating water-heat sink technique. This is an indication of waste heat recovery from the solar thermal power generation.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.3
      Issue No: Vol. 25, No. 4 (2021)
       
  • New Oligocene to Early Miocene Palynomorph Zonation of GZ-1 Well, Onshore
           Western Niger Delta, Nigeria

    • Authors: F.O. Amiewalan, F.O. Balogun
      Pages: 511 - 521
      Abstract: Palynological studies was carried out on GZ-1 well from the onshore western Niger Delta in order to recognized a new detected developments in the varieties of key pollen and spore taxa that have shorter and more distinguished interval zones to advance stratigraphical delineation. Palynological analysis was carried out using the conventional maceration technique for recovering acid insoluble organic-walled microfossils from sediments. The result yielded rich and diversified palynomorphs. The main assemblage were dominated by angiosperm pollen grain (dominant global flora from Late Cretaceous onwards) followed by pteridophytes/bryophyte spore. Dinoflagellate cysts, on the contrast, were less diverse while the Gymnosperm pollen were scarce. The identified palynomorph were used to establish seven main zones - AF1 Psilatricolporites crassus zone, AF2 Verrucatosporites usmensis zone, AF3 Triplochiton scleroxylon zone, AF4 Crassoretitriletes vanraadshooveni zone, AF5 Acrostichum aureum zone, AF6 Gemmatriporites ogwashiensis zone and AF7 Retitricolporites irregularis zone in this study. Established on quantitative events, the zones were also divided into seven subzones with some having finer subdivisions into (a) and (b) ranging in age from Early Oligocene to Early Miocene. Previous unfiled event trends of important indicator taxa of spores and pollen accredited to
      Pelliceria, Caesalapinoideae, Stenochlaena palustris, Polypodiaceae, Lygodium microphyllum, Polypodiaceae, Adiantaceae and Amanoa (Euphorbiaceae) have assisted improvement of formerly used palynological zonation schemes in the Niger Delta. It is anticipated that this quantitative zonation scheme erected, will help with imminent palynostratigraphical studies in the onshore Niger delta area.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.4
      Issue No: Vol. 25, No. 4 (2021)
       
  • Effects of Gender and Aerobic Exercise on Oxidative Stress and
           Haematological Parameters of Students of Physical Education

    • Authors: E.O. Akarah
      Pages: 523 - 527
      Abstract: The present study examined the effects of sex differences and aerobic exercise on oxidative stress and haematological parameters. The study had participants who were between 19- 20 years and consisted of 15 male and 15 female students of Physical Education in Delta State University, Abraka. The students were made to undergo rigorous aerobic exercise which involved running at an average speed of about 10 Kilometres / hour for about 1 hour and 20 mins. Blood Sample was taken from each student before and after the aerobic exercise and used for analysis. The plasma superoxide dismutase (SOD) activity of all the students (both sexes combined) was significantly (p < 0.05) increased after physical exercise. Similarly, the level of lipid peroxidation (LPO) in the plasma of same group of students was significantly (p<0.05) increased after physical exercise. When the data obtained were analysed based on gender the activity of SOD was significantly (p<0.05) decreased in male students but increased in the females after aerobic exercise. Conversely, there was a significant (p<0.05) increase in extent of LPO in male students but a decrease in females after aerobic exercise. Analysis of the haematological parameters showed that only the white blood cell (WBC) count was significantly (p<0.05) decreased in all students after aerobic exercises. After aerobic exercise, the Hb concentration and RBC count were significantly (p<0.05) decreased in male students only. Similarly, male students had a significant (p<0.05) decrease in both HCT and WBC count after aerobic exercise but the females had no significant (p>0.05) change in these parameters. In conclusion this study shows that physical exercise can cause changes in oxidative stress and hematological parameters. The study also reveals that male participants were more vulnerable to oxidative stress and variations in hematological indices.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.5
      Issue No: Vol. 25, No. 4 (2021)
       
  • Evaluation of the Efficacy of Plant Materials for the Control of Flea
           Beetles Podagrica spp on Okra Abelmoschus esculentus L

    • Authors: S. Danjuma, I. Muhammed, G. Yahaya
      Pages: 529 - 535
      Abstract: The efficacy of the Senegal prickly-ash Zanthoxylum zanthoxyloides (Lam.) roots and the African locust bean tree Parkia biglobosa (Jacq.) pod back was study for their efficacy in the control of okra pest, Podagrica spp. The study was carried out in the laboratory and on the field in the farming season of 2018. Z. zanthoxyloides roots were obtained from Jima-Doko forest and P. biglibosa fruit back from Takunpara. Both plant materials were air-dried under shade for 120 hours. Both plant parts were pounded separately in wooden mortar with the aid of wooden pestle until the materials turns to fine particles. Determined weight of 100, 150, 200, 250, and 300 grams were taken for each plant materials and soaked in water for 24 hours and stirred at intervals of an hour. The mixture were then sieved with a muslin cloth and filtered with Whatman filter paper to eliminate all finest particles of varying sizes. These concentrations were applied individually on 10 adults of Podagrica spp. in the laboratory. It was observed that the concentration of 200 – 300g performed better for both plant materials in the control of okra flea beetle. These resulted to the death of above 50% of the insect within 2 hours. These significant laboratory trials were then formulated and taken to the field. Both plant materials acted as anti-feedants and repellants against Podagrica spp. It was also revealed that Z. zanthoxyloides performed significantly (p<0.05) better than the P. biglibosa. Furthermore, short interval applications (<or=3days) of these plant materials could be a good  replacement for synthetic chemicals, hence bio-pesticides that could be adopted for organic agriculture.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.6
      Issue No: Vol. 25, No. 4 (2021)
       
  • Biodiesel Production and Characterization from Used Vegetable Oil

    • Authors: C.A. Odega, G.T. Anguruwa, C.O. Fakorede
      Pages: 537 - 542
      Abstract: Biodiesel is a fuel produced from renewable resources; it is a clean alternative fuel, which has drawn the attention of energy researchers for the last two decades due to the disturbing effect of climate change caused by diesel fuel. This paper focuses on showcasing the qualities of biodiesel produced from used vegetable oil and the positive impact on the alarming change in climate today. This paper presents an experimental investigation on production of biodiesel from used vegetable oil (UVO) gotten from a road side bean cake (akara) seller. The oil that was intended to be thrown out was de-odoured and filtered to remove impurities. The filtered oil was then used for biodiesel production and characterized with physical and fuel properties such as density, viscosity, cloud point, refractive index, specific gravity, ash content, moisture content, flash point and cloud point. The results obtained were afterwards compared to ASTM (American Society for Testing and Materials) and EN (Europe’s) international standards. Two biodiesels samples were produced at different temperatures but the same timings. The biodiesel were produced at 700C at 40mins (biodiesel A) and 1000C at 40mins (biodiesel B) with values of specific gravity (0.98 kg/m3; 0.90 kg/m3), density (936kg/m3; 882kg/m3), kinematic viscosity (1.5mm/s2; 5.5 mm/s2), cloud point (150C; 20C), flash point (2600C min; 2000C min), moisture content (0.07%; 0.04%), refractive index (1.4609; 1.4398) and ash point (0.24%; 0.01%) respectively. On comparison, biodiesel A couldn’t match up to the international standards while biodiesel matched up to the standards given.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.7
      Issue No: Vol. 25, No. 4 (2021)
       
  • Assessment of Land Use/Cover Change Using Remote Sensing and GIS
           Techniques: A Case of Osogbo and Its Peripheral Areas in Nigeria

    • Authors: O.S. Afolabi, O.J. Aigbokhan, J.O. Mephors, A.J. Oloketuyi
      Pages: 543 - 548
      Abstract: The importance of accurate and timely information describing the nature and extent of land resources and changes over time is increasing, especially in rapidly growing city areas. Landsat satellite imageries of three different time periods, i.e., Landsat Thematic Mapper (TM) of 1982, 2000 and 2018 were acquired by Global Land Cover Facility Site (GLCF) and earth explorer site, quantify the changes in the Osogbo and its peripheral areas from 1982 to 2018 over a period of 36 years. These data sets were imported in ArcGIS 10.3, ERDAS Imagine and IDRIS Selva, satellite image processing softwares to create a false colour composite (FCC), supervised classification methodology was employed using maximum likelihood technique. The images of the study area were categorized into four different classes namely Core-urban, Peri-urban, Vegetation, water body. The results indicate that during the last thirty-six (36) years, Core-Urban land and water body have been increased by 2.74% (38.20 km2) and 0.98% (13.69 km2) while Peri-Urban land, and vegetation cover have decreased by 0.35% (5.00 km2), and 3.36 % (46.87 km2), respectively. The results quantify the land cover change patterns in the city and its peripheral area and demonstrate the potential of multitemporal Landsat data to provide an accurate, economical means to map and analyse changes in land cover over time that can be used as inputs to land management and policy decisions.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.8
      Issue No: Vol. 25, No. 4 (2021)
       
  • Repellant Effect of Urine Insecticides Spray and NPK (15:15:15) Compound
           Fertilizer Application on the Growth and Yield of watermelon (Citrullu
           lonatus Thumb)

    • Authors: L.O. Akhideno, O.A. Sangotoyinbo, A.S. Yusuf, V.R. Bakpolor, N.N. Akemien, B.O. Adaaja
      Pages: 549 - 553
      Abstract: A field study conducted to investigate the Repellent effects urine insecticide spray and NPK(15:15:15) compound fertilizer on the growth and yield of watermelon (Citrullus Lonatus Thumb) in forestry Research Institute of Nigeria, (FRIN) experimental plot at Agbede, Etsako West Local Government Area of Edo State. Four regimes of Urine insecticide spray and four rate of NPK compound fertilizer application were factorially combined and laid out in a completely randomized block design (CRBD) with three replication. Urine insecticide spray and fertilizer application did not affect the period of flowering and poddring significantly (P> 0.05). NPK compound fertilizer application significantly (P< 0.05) increase the number and length of main vines, pod number and yield while Vines insecticide spray significantly (P< 0.05) increase the length of the main virus and yield. In the rate of application, 200kg/ha NPK was optimum and this recommended for watermelon cultivation. Twice spray regimes of urine insecticide was recommended for watermelon cultivation.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.9
      Issue No: Vol. 25, No. 4 (2021)
       
  • Analysis of Meat Consumption Pattern in Ogbomoso North Local Government
           Area, Oyo State, Nigeria

    • Authors: O.V. Arowolo, J.A. Oladejo, T.O. Oguntoye , G.B. Kabir , B.A. Salako
      Pages: 555 - 559
      Abstract: The increasing awareness of the benefits of more nutritious, healthier and safer food products by consumers plays a vital role in the recent changes experienced in the food production chain, and meat products are no exception to this. The study investigated consumption pattern of meat in Ogbomoso North Local Government Area, Oyo State, Nigeria. Primary data for the study were obtained from 120 respondents with the use of structured questionnaire analysed using descriptive statistics and inferential statistics. According to the study, chicken, turkey and beef with percentage frequencies 96.7%, 81.7% and 76.8% respectively were the most consumed meat types, while quail, rabbit and guinea fowl with percentage frequencies 6.7%, 7.5% and 12.5% respectively were the least consumed meat types. Also, income of the respondent with t-value 41.08 and a positively signed coefficient at 1% level of significance was found to have a direct effect on the monthly expenditure on preferred meat type. The study recommend there should be awareness on the nutritional benefits of consuming meats of low saturated fats and calorie contents such as rabbit, quail and guinea fowl and also to teach them how to raise these animals domestically.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.10
      Issue No: Vol. 25, No. 4 (2021)
       
  • Evaluation of pH of Drilling Fluid Produced from Local Clay and Additives

    • Authors: F.E. Otitigbe
      Pages: 561 - 566
      Abstract: Maintaining the pH of drilling fluid with suitable additives is one of the important operation for efficient drilling operations.  However, commercial hydroxides are mostly used to control the pH of the drilling fluid. This paper evaluates locally sourced pH additives of burnt plantain heads (BPH), burnt ripe burnt ripe plantain peels (BRPP), and burnt banana plantain peels (BBPP) in comparison with conventional potassium hydroxide (KOH) and sodium hydroxide (NaOH) as suitable agents to control pH of drilling fluid. The drilling fluid as prepared with bentonite and local clay in different concentrations of KOH, NaOH, BPH, BRPP and BBRPP including Traona. The result of the study showed that pH of the drilling improved with respective use of conventional KOH, NaOH, BPH, BRPP and BBRPP as additives. In addition, KOH showed the maximum percentage of degree (%) of improvement on the drilling fluid with 38.46-45.45% compared with 27.2-40% for NaOH. On the other hand, BRPP achieved 27.2-41.2%, followed with 20-33% and 20-29.4% for BPH and BBPP respectively. Thus, the locally sourced additives could be used to enhance the pH and properties of drilling fluid.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.11
      Issue No: Vol. 25, No. 4 (2021)
       
  • Spray Pyrolysed Nanostructured Gold-Doped Tin Oxide (Auto) Thin Films

    • Authors: S.I. Akinsola, K.S. Adedayo, A.B. Alabi, D.B. Olanrewaju, A.A. Ajayi, O.A. Babalola
      Pages: 567 - 572
      Abstract: Nanostructured SnO2 thin films were grown by the chemical spray pyrolysis (CSP) method. Homemade spray pyrolysis technique is employed to prepare thin films. SnO2 is wide band gap semiconductor material whose film is deposited on glass substrate. A gold nanoparticle-doped tin oxide thin film (AuTO) was also prepared. UV-VIS (ultraviolet visible) spectroscopy and four-point probe analysis are done for optical and electrical analysis. UV-Visible absorption spectra show that the band gap of SnO2 thin film is 3.78 eV and 3.82 eV for AuTO. Band gap of SnO2 thin film can be tuned that it can be used in optical devices. The films have transmittance increases (to about 60%) and the absorbance decreases in the visible region of the electromagnetic spectrum. The electrical conductivity of the Tin Oxide is enhanced by functionalizing with the Gold nanoparticles. It is higher than that of the Tin oxide only; 0.77 x 10-2 (Ohm cm)-1 and 3.55 x 10-2 (Ohm cm)-1 for SnO2 and AuTO respectively. These properties reveal that Tin Oxide doped with gold can actually be a good material for a transparent conducting oxide to be used in photovoltaic fabrication and in electronics.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.12
      Issue No: Vol. 25, No. 4 (2021)
       
  • Physicochemical Property and Some Vitamin Contents of Telfaria
           occidentalis
    Seeds Oil

    • Authors: B.N. Aguebor-Ogie, A.C. Ukwuonwo-Ediale, G.E. Eriyamremu
      Pages: 573 - 578
      Abstract: Fluted pumpkin, a member of the Cucurbitaceae family, is a versatile fruit and is used for various food processing application in Nigeria. As a result of its versatility, this study was conducted to ascertain the physiochemical characteristics and some vitamins content of its seeds oil. The pumpkin pods were gotten from a local farm in Benin metropolis, Edo state, Nigeria. The extraction of oil was conducted by the use of Seed-2-oil ® hot press machine. Various other standard methods were employed in the study. The physicochemical characteristics showed that the light yellow oil had a refractive index of 1.4710C ± 0.001 and melting point of 19.670C ± 1.80 while the chemical properties revealed acid value (0.64 mg KOH/ g of oil ± 0.05), peroxide value (0.99 Meq of 𝑂2/Kq of Oil ± 0.01), saponification value (189.73 mg KOH/g of oil ± 5.20) and p-anisidine (0.09 ± 0.01) respectively. The findings for the vitamins revealed vitamin A (781IU ± 1.35), D (1361IU ± 0.14) and K3 (8.145IU ± 0.36) respectively. The findings from this study revealed that pumpkin seed oil can be a good nutritive enrichment of foods and food products and a possible utilization in pharmaceuticals.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.13
      Issue No: Vol. 25, No. 4 (2021)
       
  • Economic Contribution of Wildlife to Bushmeat Market in Ikire, Osun State,
           Nigeria

    • Authors: T.K. Adebowale, O.O. Oduntan, A.E. Adegbenjo, A.S. Akinbode
      Pages: 579 - 583
      Abstract: This paper assessed the economic contribution of wildlife to bushmeat market in Ikire, Osun State, Nigeria. Primary data were collected using semi-structured questionnaire and in-depth interview of targeted respondents. Bush meat sellers in Irewole local government area, Ikire were sampled. Data were analyzed using descriptive statistics, budgetary analysis and likert scale analysis. The result showed that majority of the bushmeat sellers were females (55.9%) with a mean age of 41 years. Most of the bushmeat sellers strongly agreed (4.91±0.09) that they generate more income from bushmeat trade, 4.71±0.17 equally noted that customers prefer to purchase bushmeat than convectional meat type while 1.56±0.19 disagreed that seasonal change affects customer’s preferences for bushmeat in the markets. Also, 5.00±0.0, 4.82±0.13, 4.74±0.17 respectively believes that bushmeat are more delicious, better source of protein, more of medicinal value when compared with conventional meat type. Furthermore, an average of 3.70±0.2 had cultural sentiments for the consumption of bush meat. An average net profit per respondent yielded ₦3,565.53, while BCR and profitability index are 1.95 and 0.95 respectively. Conclusively, bushmeat trading is a profitable and very lucrative enterprise.    
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.14
      Issue No: Vol. 25, No. 4 (2021)
       
  • Analytic Signal Depth from High Resolution Aeromagnetic Data over the
           Gongola Basin Upper Benue Trough Northeastern Nigeria

    • Authors: H. Musa, N.E. Bassey, R. Bello
      Pages: 585 - 590
      Abstract: The study of high-resolution aeromagnetic data was carried out over the Gongola basin, upper Benue trough, northeastern Nigeria, for analytic signal depth determination. Total intensity magnetic map obtained from the data using the Oasis Montaj TM programming software was used to get the residual map by polynomial fitting, from where the analytic signal was obtained with the use of anomaly width at half the amplitude (X1/2). This was used to carry out depth estimations over the study area. The results showed that it peaks over the magnetic structure with local maxima over its edges (boundaries or contact), and the amplitude is simply related to magnetization, likewise results also showed that the depth estimates were in the range of 1.2 to 5.9 km and were calculated for contact, dyke/sill and horizontal cylinder respectively. The lowest values are from DD profiles, while the highs are from AA profiles. This work is important in identifying dykes, contacts and intrusives over an area.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.15
      Issue No: Vol. 25, No. 4 (2021)
       
  • Modelling and Simulation of Frequency Response on Input shaft/carrier of a
           Planetary Gear Train under the Influence of Vibration

    • Authors: E.M. Etuk, R.S. Ebhojiaye, K.R. Ekanem
      Pages: 591 - 598
      Abstract: The transmission of motion from one gear to the other in a planetary gear train usually result in unwanted conditions such as vibration due to poor gear assembly, high contact forces, high rotation speeds etc. The vibrating effect of the gear can result in higher or lower frequency response which may damage the gear or offer safe working condition. Using SOLIDWORKS 2018 version for the modelling, SimulationXpress was used to conduct frequency analysis on input shaft/carrier of a planetary gear train to understand its behaviour at different mode shapes during vibration. Results obtain from the input shaft/carrier frequency analysis showed natural frequency values of 1922.4Hz, 1922.8Hz, 2101Hz, 2183.1Hz and 2185.3Hz for mode shape 1-5. Geometry of the input shaft/carrier appeared differently at each mode number, resulting in frequency responses characterised by different modal shapes. This also led to gradual increase in the natural frequency of the input shaft/carrier at increasing mode no, consequently causing deflection on the mode shapes of the input shaft/carrier model. Hence, vibration should be reduced to the lowest limit of tolerance for minimum deflections and longevity of the input shaft/carrier and planetary gear components.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.16
      Issue No: Vol. 25, No. 4 (2021)
       
  • Determination of Some Selected Thermal Properties of Pumpkin Seeds
           (Cucurbita pepo)

    • Authors: M.O. Sunmonu, M.M. Odewole, O.A. Adeyinka, M.S. Sanusi, S.O. Musa
      Pages: 599 - 604
      Abstract: In this study, some selected thermal properties (specific heat, thermal conductivity and thermal diffusivity) in the moisture content range of 5.0-5.6% or green and 4.80 – 5.20% for white varieties of pumpkin seeds were determined. The specific heat was measured using mixture method while the thermal conductivity was measured by transient technique using the heat line source. The green pumpkin seed has average moisture content of 5.2% higher than moisture content of white pumpkin seed of average 4.8%. The average specific heat values of green pumpkin seed are 6.171kJ/kgK and white pumpkin seed 4.327kJ/kgK. The thermal conductivity values for white pumpkin seed ranged from 0.074 to 0.288 W/m°C while that for green pumpkin seed ranged from 0.079 to 0.433 W/m°C. The thermal diffusivity values for green pumpkin ranged from 0.0011 to 0.06 m2/s while that for white pumpkin seed ranged from 0.01 to 0.06 m2/s. It was concluded that the higher the moisture content (5.2%) the higher the value of specific heat of seed (6.171kJ/kgK). It can also be concluded that the thermal conductivity (0.079 to 0.433 W/m°C) value is higher with high moisture content (5.2%).
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.17
      Issue No: Vol. 25, No. 4 (2021)
       
  • Molecular Characterization of Gut Bacterial Flora of Honeybee (Apis
           Mellifera Adansonii) From Some Selected Apiaries in Ogun State, Nigeria

    • Authors: E.O. Oladipupo-Alade, O.A. Lawal, I.O. Oyewo, I.E. Odiaka, N.O. Haastrup, M.D. Oyedele, O.A. Ganiyu
      Pages: 605 - 608
      Abstract: Research related to physiology and pathology of honey bees in particular Apis mellifera adansonii has attracted a lot of attention. The present study is aimed to determine honeybee (Apis mellifera adansonii) gut microbiome from Apiary in Olabisi Onabanjo University and Osoba Avenue Odo-Epo, Odogbolu Local Government. Twenty (20) honeybees workers (A. mellifera) were collected into a small vile containing sugar powder from the apiary located in OOU and Osoba Avenue at Odo-Epo during rainy season in July and transported to Zoology and Environmental Biology laboratory in OOU and kept in ice-cubes (-50C) till daybreak. Standard microbiological analysis for isolation of bacteria was used, adopting Clinical Laboratory Standard Institute procedures. The phylogenetic analyses based on the 16S rDNA gene were further used to characterize the organism in order to establish  relationships among them. The results showed microbiota of the studied samples includes; Cedeca davisae, Cronobacter  dublinensis, Enterobacter aerogenes, Kluyvera cryocrescens, Klebsiella oxytoca, Providencia vermicola, Salmonella enteric, Providencia alcalifaciens, Serratia nematodiphila, Pseudomonas plecoqlossicida, Klebsiella michiganensis, Serratia marcenscens, Pseudomonas aeruginosa, Escherichia coli, Aeromonas hydrophila and Enterobacter asburiae. Klebsiella spp. was more abundant and prominent in the digestive guts of honeybee workers both in OOU and Osoba Avenue, Odo Epo. The result of the percentage identity and closest accession of the isolates revealed that, Enterobacter aerogenes had the closest accession number and with highest percentage identity of (99%). The findings from this study showed that microbiota component communities of A. mellifera adansonii in OOU were composed of more Gram-negative bacteria than Gram-positive bacteria in Odo Epo.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.18
      Issue No: Vol. 25, No. 4 (2021)
       
  • Sensitivity of Earthworm (Eisenia fetida) in Mining Soil from
           Ijero-Ekiti, Nigeria

    • Authors: S.O. Agbo, M.A. Mustapha, C.E. Ogaugwu, O.G. Sodipe, E.C. Chukwu, M.F. Raji, U.C. Nebo
      Pages: 609 - 613
      Abstract: Excavation and processing of mineral deposits are valuable revenue sources yet they contribute serious environmental problems worldwide. Mining activities are widespread and contribute to heavy metal contamination in rural communities in Ekiti State, Nigeria. Available research failed to establish how mining soil may impact on resident terrestrial organisms. This study assessed the health of soil from active mining site by testing it on earthworms (Eisenia fetida) for 10 weeks. Survival, mobility, morphology and behaviour of worms were assessed while soil was analyzed for selected heavy metals by atomic absorption spectrometry. Worm survival was evident as the proportion of reference soil increased in exposure mixture and improved until 92% in the control. Worms curled up at the bottom of test vessels with varying proportions of mining site soil and appeared discolored and dehydrated when taken out of test soil, with characteristic sluggishness, particularly as the proportion of mining soil increased in exposure mixtures. Though metal levels were within permissible limits, morphology of exposed worms were visibly impacted, which corresponds in severity with increasing proportion of mining soil. On the contrary, worms tested in 100% reference soil appeared healthy and active in upper part of exposure vessels. These results suggest that the tested mining soil had adverse impacts on mobility, morphology, behavior and survival of exposed organisms when compared with the control population. Therefore, food products grown downstream of the mining site may be at risk of heavy metal contamination with consequences on food quality, water quality and food chain.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.19
      Issue No: Vol. 25, No. 4 (2021)
       
  • Analysis of Meat Consumption Pattern in Ogbomoso North Local Government
           Area, Oyo State, Nigeria

    • Authors: O.V. Arowolo, J.A. Oladejo, T.O. Oguntoye , G.B. Kabir , B.A. Salako
      Pages: 615 - 619
      Abstract: The increasing awareness of the benefits of more nutritious, healthier and safer food products by consumers plays a vital role in the recent changes experienced in the food production chain, and meat products are no exception to this. The study investigated consumption pattern of meat in Ogbomoso North Local Government Area, Oyo State, Nigeria. Primary data for the study were obtained from 120 respondents with the use of structured questionnaire analysed using descriptive statistics and inferential statistics. According to the study, chicken, turkey and beef with percentage frequencies 96.7%, 81.7% and 76.8% respectively were the most consumed meat types, while quail, rabbit and guinea fowl with percentage frequencies 6.7%, 7.5% and 12.5% respectively were the least consumed meat types. Also, income of the respondent with t-value 41.08 and a positively signed coefficient at 1% level of significance was found to have a direct effect on the monthly expenditure on preferred meat type. The study recommend there should be awareness on the nutritional benefits of consuming meats of low saturated fats and calorie contents such as rabbit, quail and guinea fowl and also to teach them how to raise these animals domestically.
      PubDate: 2021-10-08
      DOI: 10.4314/jasem.v25i4.20
      Issue No: Vol. 25, No. 4 (2021)
       
  • Heavy Metals Adsorption on Cellulosic Materials from Agricultural Waste

    • Authors: M.O. Onigbinde, S.R. Okeke
      Pages: 621 - 624
      Abstract: Adsorption technique has been known to be a very effective method for treatment of heavy metals polluted wastewater, with the advantages of specific affinity, simple design and being user-friendly. However, the high cost of activated carbon commonly used as the adsorbent makes it necessary to explore the use of cheap cellulosic adsorbents. In this study, the adsorptive property of sugarcane bagasse (SB) and orange mesocarp (OM) was investigated. The cellulosic adsorbents were used for the sorption of lead and zinc ions from aqueous solutions. The effects of varying adsorbent dose, varying contact time and initial metal ion concentration on adsorption process of the metals were studied. The results show that both adsorbents (though waste materials) are viable for removal of metals from wastewater. Moreover, SB had higher sorption capacity for zinc (12.95 for SB and 12.68 for OM) while OM had higher sorption capacity for lead (9.90 for OM and 9.48 for SB) at optimum dosage. The isothermal studies shows that for lead adsorption, experimental data best fitted the Langmuir isotherm for both adsorbents (R2 of 0.9574 for OM and 0.98 for SB) while the data for zinc adsorption best fitted into Freundlich isotherm with SB (R2 of 0.9565) and Langmuir isotherm for OM (R2 of 0.814).
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.21
      Issue No: Vol. 25, No. 4 (2021)
       
  • Assessment of Gmelina, Danta Solid Wood and Plywood Hive Types for
           Beekeeping

    • Authors: O.J. Akinbi, S.A. Adeduntan, E.O. Toyinbo, O.T. Alamu
      Pages: 625 - 629
      Abstract: The study was carried out to compare the performance of wood hive types and plywood hive types in three different vegetation types between June 2018 and May 2020 in Akure South local Government of Ondo State, Nigeria. A total of eighteen (18) Kenyan Top Bar hives made from Danta, Gmelina and plywood were constructed at six (6) each per wood types. Two (2) each of Danta, Gmelina and Plywood hives were installed in three locations: Natural Forest, Plantation forest and cocoa farmland. The rate of colonization of each hive was evaluated at 6, 12, 18 and 24 months after installation in the field. The results revealed that plywood hive type was not colonized in the natural forest throughout the period of study while Danta and Gmelina each recorded 50% colonization at the end of the experiment. In plantation forest, each of the Plywood and Gmelina hives recorded 50% colonization at 24 months after installation while bees in Danta hives absconded before 24th months after installation. In cocoa farmland, Gmelina recorded 100% colonization at 24 months, Danta recorded 50% colonization at 24 months and plywood accounted for 100% colonization at 24 months after installation. An improvement was recorded in the colonization performance at 12,18, 24 month after installation of hives. Plywood hives installed in the cocoa farmland and plantation accounted for higher colonization percentage than natural forest.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.22
      Issue No: Vol. 25, No. 4 (2021)
       
  • Antioxidants, Microbial Load and Heavy Metal Contents of Some Sachet
           Tomato Paste Obtained in Lagos State, Nigeria

    • Authors: O.O. Eleyowo, O.D. Amusa
      Pages: 631 - 636
      Abstract: Tomato paste is fast becoming first choice for many homes in cooking while meeting up with their busy  schedules in a cosmopolitan city like Lagos State, Nigeria. The study was aimed at evaluating the antioxidant contents, microbial load and heavy metal contents of both unprocessed and processed tomato products. β-carotene, lycopene and vitamin C contents were analysed accordingly on selected sachet tomato paste. Microbial colony counts were done using both nutrient agar and potatoes dextrose agar. Heavy metals from sampled tomato products were done using Atomic Absorption Spectrometry. The study observed β-carotene ranged between 0.02 – 0.52 mg/g, lycopene ranged between 0.12 – 0.56 mg/g and vitamin C contents of ranged between 12.50 – 75.0 mg/mL. These were more than WHO/FAO and FEPA recommendations. All tomatoes samples showed microbial load higher than limits allowable. Bacillus sp., Salmonella sp., Aspergillus sp. were predominantly isolated from sampled processed tomato products. Cadmium contents were above the permissive limit in some of the tomato paste products. Copper, zinc, lead, nickel, chromium and iron were not detected in all samples evaluated. The study showed few processed tomato products were safe for  consumption. Hence, monitoring by regulatory agencies for consumer safety regulations is highly  recommended on processed tomato producers.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.23
      Issue No: Vol. 25, No. 4 (2021)
       
  • Constraints and Prospects of Mechanized Processing of Forest Tree Seeds

    • Authors: A.S. Adeleye, A.E. Adebanjo, E.S. Omoghie, T. Ogundare, S.A. Alli
      Pages: 637 - 642
      Abstract: Trees are generally propagated from seeds and the suitability and quality of the seeds have a big effect on the success of the plantations, afforestation and reforestation programmes established from their seedlings. In view of the fact that good forestry projects start with good seeds, the quality as well as quantity of tree seeds is very important. Processing of seeds is one of the main factors that determined the quality and quantity of seeds. However, processing of forest tree seeds in Nigeria and other developing countries has mostly been carried out using traditional methods which affects the quality of the seeds especially for large quantity of seeds. This work attempts to raise awareness on the need to mechanize processing of forest tree seeds so as to increase the quantity and quality of the seeds and to reduce the drudgery, time and health hazards involved in the common traditional methods of processing the seeds. Tree seeds are often regarded as inferior to crop seeds, a misnomer (mistaken belief) that needs to be rectified to promote tree planting.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.24
      Issue No: Vol. 25, No. 4 (2021)
       
  • Evaluation of Nutraceutical Properties of Pleurotus ostreatus (Jacq.) P.
           Kumm (Pleurotaceae)

    • Authors: G.O. Okunlola, S.A. Akinyemi, M.A. Jimoh, E.D. Olowolaju, Y.O. Ajao
      Pages: 643 - 647
      Abstract: Recently, consumption of mushroom is on the increase in many developing countries. They serve as food supplements in diets of the people. The present study was conducted to evaluate nutraceutical properties of the oyster mushroom (Pleurotus ostreatus), a widely cultivated mushroom in Nigeria. Properties such as proximate composition, mineral ions and antioxidants contents were analyzed using standard methods. P. ostreatus was found to contain high percentage of crude fibre, moisture content, carbohydrates, crude fat, total ash, crude protein and oil matter. Percentage of mineral ion such as sodium, calcium, potassium, magnesium, phosphorus, iron, copper and zinc were found to be lower in value. Antioxidants such as flavonoid, phenol, lycopene, β Carotene and ascorbic acid in P. ostreatus were found to be high in value. Overall, the percentage content of minerals in P. ostreatus was less than 1%, proximate composition was 33.64% and antioxidants was 66.16%. This showed that P. ostreatus had a high content of antioxidants, moderate amount of proximate composition and low amount of minerals. As P. ostreatus contains low calorific value and very high content of antioxidants, dietary fibres and minerals, it can therefore be said to be potentially good for medicinal purposes especially among the vegetarian consumers
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.25
      Issue No: Vol. 25, No. 4 (2021)
       
  • Multivariate Analysis of Vehicular Emissions in Parts of Benin City, Edo
           State, Nigeria

    • Authors: I.R. Ilaboya, S.D. Iyeke, E.I. Abulu
      Pages: 649 - 654
      Abstract: The focus of this study is to monitor the incidence of vehicular emissions in some parts of Benin City in addition to studying the spatial variation of the pollutant using multivariate analysis of variance (MANOVA). Seven (7) georeferenced sampling points were employed for data collection and gaseous pollutants such as; dinitrogen oxide (NO2), carbon monoxide (CO) including the total radiation were monitored in the morning and evening for 35 days with the aid of portable toxic gas monitors and radiation alert meters. Also measured were maximum temperature and wind speed using infra-red thermometers and portable anemometer respectively. From the result, it was observed that for temperature, the mean ± standard deviation during morning session was 30.549 ± 1.3716 and during evening season it was 28.879 ± 1.1788. For NO2, the mean ± standard deviation during morning session was 0.0181 ± 0.01119 and during evening season it was 0.0230 ± 0.01282. For CO, the mean ± standard deviation during morning session was 0.5428 ± 0.36396 and during evening season it was 0.6169 ± 0.32395. For total radiation, the mean ± standard deviation during morning session was 0.247 ± 0.1285 and during evening season it was 0.281 ± 0.1298. On the significance difference of the overall results, it was revealed that the difference in concentration of vehicular emissions during the early hours of the morning and peak hours of evening is significant. With a calculated partial Eta squared based on Pillai’s trace of 0.325, it was concluded that; there exist about 32.50% variability among the dependent variables.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.26
      Issue No: Vol. 25, No. 4 (2021)
       
  • Structure, Conduct and Performance Analysis of Sheabutter Marketing in Oyo
           State, Nigeria

    • Authors: O.O. Olugbire, A.J. Fakunle, T.O. Oguntoye, O.E. Obafunsho
      Pages: 655 - 661
      Abstract: The study investigated the marketing practices, channels of sheabutter distribution and performance using multi stage sampling techniques to select three local government area for the study in Oyo State. The results showed about 91% of the respondents were female, the average age of the respondents was 35.5 years. Most (92.5%) of the respondents were married with average household size of 8 members. Marketing efficiency was 135% which implies that the respondents covered the cost of marketing and made a margin above 100%. Unavailability of sheabutter due to deforestation and credit unavailability were the major constraints faced by sheabutter marketers. Furthermore, Household size (p=0.005), marketing experience and member of organization (p=0.001), source of shea butter (p=0.01) and credit availability (p=0.005) were factors influencing marketing efficiency of the respondents. The study concluded that sheabutter marketing was a profitable enterprise in the study area. The study recommended that there should be proper awareness on the prospect of sheabutter business (either for local use or exportation) among young people; this will be an avenue to alleviate the scourge of unemployment in the country.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.27
      Issue No: Vol. 25, No. 4 (2021)
       
  • Physicochemical and Heavy Metal Assessment of the Udu River, Delta State,
           Nigeria

    • Authors: O.O. Okobiebi, B.O. Okobiebi
      Pages: 665 - 667
      Abstract: The Udu River is a major source of commerce and provides water for agricultural and domestic use to the Udu people, hence we studied the physicochemical parameters (pH, electrical conductivity, TSS, TDS, turbidity, Salinity, DO, COD, BOD, chlorides, sodium, potassium, total hardness, alkalinity, nitrates, ammonium, sulphates) as well as the evaluation of the degree of metal contamination (iron, zinc, cadmium, nickel, copper and lead) present in the samples. The analyses carried out revealed water samples were acidic, pH below 7, temperature ranged from 29.5 oC - 32.7 oC which was above WHO permissible limit 25oC, low levels of Dissolve oxygen DO (DO: max = 6.5 mg/L below WHO limit of 7.5 mg/L) and BOD ranges did not exceed the suggested 4.5mg/L (WHO max. limit). Concerning the heavy metals, the examined results showed lead, nickel, copper and zinc all below the WHO max limit. A significant increase in the concentration of Iron was noticed in Ovwian sampling site, also there was also build of cadmium above WHO limit 0.003mg/L at Igbogidi.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.28
      Issue No: Vol. 25, No. 4 (2021)
       
  • Occurrence, Diversity and Abundance of Nematode Pests of Pineapple (Ananas
           comosus) in Two Local Government Areas of Rivers State, Nigeria

    • Authors: A.A. Tanimola, O. Olotu, A.O. Asimiea
      Pages: 665 - 675
      Abstract: Plant-parasitic nematodes (PPNs) contribute to yield losses in pineapple production. Limited studies have been conducted on plant-parasitic nematodes on pineapple despite reports of PPNs infecting it. A survey was conducted in Obio-Akpor and Ikwerre Local Government Areas (LGAs) of Rivers State to determine the occurrence, abundance and diversity of PPNs associated with pineapple. A total of 60 composite samples were collected from the two LGAs. Nematodes were extracted from soil and root samples using the modified Baermann technique and identified using standard procedures. Data were processed using relative frequency of occurrence (RFOC), relative importance values (RIVs), diversity indices, nematode population was calculated and analysis of variance. The most occurring plant-parasitic nematodes were Pratylenchus, Helicotylenchus, Meloidogyne, Scutellonema and Tylenchulus. In Obio Akpor LGA, Helicotylenchus with RFOC 33.3% was the most occurring nematode pests, while Pratylenchus was the most important plant-parasitic nematode (RIV 33.8%). In Ikwerre LGA, both Helicotylenchus and Pratylenchus have the same occurrence (RFOC 33.3%) with Pratylenchus being the most important nematode pest. Pratylenchus species with RIV of 52.4% were the most important PPNs associated with pineapple in both Obio-Akpor and Ikwerre LGAs. Dominance and Shannon- Weiner indices among the PPNs are 0.58 and 0.86, respectively. In Ikwerre and Obio-Akpor LGAs, Aluu (1530) and Rumuekini (630) pineapple farms have the highest population of PPNs, respectively. Ikwerre LGA (2,150) pineapple farms had more PPNs than Obio-Akpor LGA (660). Nematode pests are associated with pineapple in the two LGAs and could be contributing to yield losses.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.29
      Issue No: Vol. 25, No. 4 (2021)
       
  • Physicochemical Property and Some Vitamin Contents of Telfaria
           occidentalis
    Seeds Oil

    • Authors: B.N. Aguebor-Ogie, A.C. Ukwuonwo-Ediale, G.E. Eriyamremu
      Pages: 677 - 681
      Abstract: Fluted pumpkin, a member of the Cucurbitaceae family, is a versatile fruit and is used for various food processing application in Nigeria. As a result of its versatility, this study was conducted to ascertain the physiochemical characteristics and some vitamins content of its seeds oil. The pumpkin pods were gotten from a local farm in Benin metropolis, Edo state, Nigeria. The extraction of oil was conducted by the use of Seed-2-oil ® hot press machine. Various other standard methods were employed in the study. The physicochemical characteristics showed that the light yellow oil had a refractive index of 1.4710C ± 0.001 and melting point of 19.670C ± 1.80 while the chemical properties revealed acid value (0.64 mg KOH/ g of oil ± 0.05), peroxide value (0.99 Meq of 𝑂2/Kq of  Oil ± 0.01), saponification value (189.73 mg KOH/g of oil ± 5.20) and p-anisidine (0.09 ± 0.01) respectively. The findings for the vitamins revealed vitamin A (781IU ± 1.35), D (1361IU ± 0.14) and K3 (8.145IU ± 0.36) respectively. The findings from this study  revealed that pumpkin seed oil can be a good nutritive enrichment of foods and food products and a possible utilization in pharmaceuticals.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.30
      Issue No: Vol. 25, No. 4 (2021)
       
  • Toxicity of Workplace Aluminum Particles: Insights from Earthworm (Eisenia
           fetida) Tests in Soil Mixtures

    • Authors: S.O. Agbo, K.N. Tijani, C.E. Ogaugwu, O.A. Ajayi, J.O. Oyewumi, M.F. Raji, U.C. Nebo
      Pages: 683 - 687
      Abstract: Lifestyle changes have led to increasing use of alternative materials in building construction, fabrication of furniture and household appliances. Apart from the associated light weight and aesthetics, Aluminum products endure various pressures that range from climatic factors to pest attacks; hence, they are more durable than wood and other conventional materials. Activities of fabricators are widespread in many Nigerian cities and these result in traces of Aluminum particles derived from cutting, shaping and surface filing. The resulting recalcitrant dust particles can exert adverse consequences on biota. Therefore, this study examined the effects of different levels of Aluminum particles on earthworm in soil mixtures by assessing their behaviour, mobility and mortality in a five-week ecotoxicity test. Worms became sluggish after only two-week exposure and this culminated in loss of mobility and ultimately mortality in exposed organisms. Mortality of worms was highest (80 – 100%) in soil mixtures with the most proportion of Aluminum particles and decreased correspondingly with contaminant levels. However, there was no mortality of worms in soil mixtures without any Aluminum particles. Lethal concentration (LC50) values of 2.564g/kg, 0.995g/kg and 0.851/kg were determined at two, four and five weeks, respectively. The results suggest that worms in the course of foraging in soil, can internalize contaminating Aluminum particles, which may lead to adverse consequences in exposed population. Considering the role of earthworms in breakdown of soil organic matter and nutrient cycling, indiscriminate disposal of Aluminum particles across various landscapes may have consequences on soil fertility, food security and sustainability.
      PubDate: 2021-10-11
      DOI: 10.4314/jasem.v25i4.31
      Issue No: Vol. 25, No. 4 (2021)
       
 
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