Subjects -> ENERGY (Total: 414 journals)
    - ELECTRICAL ENERGY (12 journals)
    - ENERGY (252 journals)
    - ENERGY: GENERAL (7 journals)
    - NUCLEAR ENERGY (40 journals)
    - PETROLEUM AND GAS (58 journals)
    - RENEWABLE ENERGY (45 journals)

ENERGY (252 journals)                  1 2 | Last

Showing 1 - 200 of 406 Journals sorted by number of followers
Energy Policy     Partially Free   (Followers: 77)
IET Power Electronics     Open Access   (Followers: 69)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 55)
IEEE Transactions on Power Systems     Hybrid Journal   (Followers: 48)
Energy     Partially Free   (Followers: 41)
Journal of Physical Chemistry C     Hybrid Journal   (Followers: 37)
Nature Energy     Hybrid Journal   (Followers: 37)
IEEE Power and Energy     Full-text available via subscription   (Followers: 34)
International Journal of Hydrogen Energy     Partially Free   (Followers: 34)
Applied Energy     Partially Free   (Followers: 32)
Energy & Fuels     Hybrid Journal   (Followers: 29)
Solar Energy Materials and Solar Cells     Hybrid Journal   (Followers: 29)
Advances in High Energy Physics     Open Access   (Followers: 26)
Advances in Natural Sciences : Nanoscience and Nanotechnology     Open Access   (Followers: 26)
Energy & Environment     Hybrid Journal   (Followers: 25)
Energy and Power Engineering     Open Access   (Followers: 23)
Applied Solar Energy     Hybrid Journal   (Followers: 21)
International Journal of Alternative Propulsion     Hybrid Journal   (Followers: 21)
International Journal of Turbomachinery, Propulsion and Power     Open Access   (Followers: 21)
Solar Energy     Hybrid Journal   (Followers: 20)
Energy Materials : Materials Science and Engineering for Energy Systems     Hybrid Journal   (Followers: 19)
Journal of Solar Energy Engineering     Full-text available via subscription   (Followers: 19)
Water International     Hybrid Journal   (Followers: 19)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 18)
Energy and Power     Open Access   (Followers: 18)
IEEE Transactions on Energy Conversion     Hybrid Journal   (Followers: 16)
Nuclear Engineering and Design     Hybrid Journal   (Followers: 16)
Energy, Sustainability and Society     Open Access   (Followers: 16)
Economics and Policy of Energy and the Environment     Full-text available via subscription   (Followers: 16)
Energy Conversion and Management     Hybrid Journal   (Followers: 15)
Progress in Energy and Combustion Science     Hybrid Journal   (Followers: 14)
Waste Management     Hybrid Journal   (Followers: 14)
Energy and Environment Research     Open Access   (Followers: 14)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 14)
Advances in Energy and Power     Open Access   (Followers: 14)
Surface Science Reports     Full-text available via subscription   (Followers: 13)
Annual Review of Resource Economics     Full-text available via subscription   (Followers: 13)
Energy Journal The     Hybrid Journal   (Followers: 13)
Energy Research & Social Science     Full-text available via subscription   (Followers: 13)
Energy and Buildings     Hybrid Journal   (Followers: 12)
International Journal of Sustainable Energy     Hybrid Journal   (Followers: 12)
Oil and Gas Journal     Full-text available via subscription   (Followers: 12)
Biofuels     Hybrid Journal   (Followers: 12)
Journal of Solar Energy     Open Access   (Followers: 12)
Journal of Renewable Energy     Open Access   (Followers: 12)
Advances in Building Energy Research     Hybrid Journal   (Followers: 11)
Energy Systems     Hybrid Journal   (Followers: 11)
International Journal of Thermodynamics     Open Access   (Followers: 11)
Joule     Hybrid Journal   (Followers: 11)
IEEE Transactions on Nuclear Science     Hybrid Journal   (Followers: 10)
Innovations : Technology, Governance, Globalization     Hybrid Journal   (Followers: 10)
International Journal of Energy Research     Hybrid Journal   (Followers: 10)
Energy Efficiency     Hybrid Journal   (Followers: 10)
Journal of Ocean and Climate     Open Access   (Followers: 10)
Energy Science and Technology     Open Access   (Followers: 10)
Energy Strategy Reviews     Open Access   (Followers: 10)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Batteries     Open Access   (Followers: 10)
ACS Energy Letters     Hybrid Journal   (Followers: 10)
Archives of Thermodynamics     Open Access   (Followers: 9)
Journal of Modern Power Systems and Clean Energy     Open Access   (Followers: 9)
International Journal of Global Energy Issues     Hybrid Journal   (Followers: 8)
International Journal of Green Energy     Hybrid Journal   (Followers: 8)
Smart Grid and Renewable Energy     Open Access   (Followers: 8)
Wiley Interdisciplinary Reviews : Energy and Environment     Hybrid Journal   (Followers: 8)
International Journal of Energy and Power     Open Access   (Followers: 8)
American Journal of Energy Research     Open Access   (Followers: 8)
CERN courier. International journal of high energy physics     Free   (Followers: 8)
Energy and Environment Focus     Free   (Followers: 8)
Annals of Nuclear Energy     Hybrid Journal   (Followers: 7)
Fuel and Energy Abstracts     Full-text available via subscription   (Followers: 7)
International Journal of Electric and Hybrid Vehicles     Hybrid Journal   (Followers: 7)
Applied Nanoscience     Open Access   (Followers: 7)
Environmental Progress & Sustainable Energy     Hybrid Journal   (Followers: 7)
Energy Storage Materials     Full-text available via subscription   (Followers: 7)
ACS Applied Energy Materials     Hybrid Journal   (Followers: 7)
Structural Control and Health Monitoring     Hybrid Journal   (Followers: 6)
Energy Prices and Taxes     Full-text available via subscription   (Followers: 6)
Journal of Building Performance Simulation     Hybrid Journal   (Followers: 6)
Materials for Renewable and Sustainable Energy     Open Access   (Followers: 6)
Energy Science & Engineering     Open Access   (Followers: 6)
American Journal of Energy and Environment     Open Access   (Followers: 6)
Atomic Energy     Hybrid Journal   (Followers: 5)
Carbon Management     Open Access   (Followers: 5)
Journal of Energy Technologies and Policy     Open Access   (Followers: 5)
Computational Water, Energy, and Environmental Engineering     Open Access   (Followers: 5)
Energy Studies Review     Open Access   (Followers: 5)
Energy Technology     Partially Free   (Followers: 5)
Geothermal Energy     Open Access   (Followers: 5)
Frontiers in Energy Research     Open Access   (Followers: 5)
Journal of Energy, Environment & Carbon Credits     Full-text available via subscription   (Followers: 5)
International Journal of Sustainable Energy Planning and Management     Open Access   (Followers: 5)
Energy and Environmental Engineering     Open Access   (Followers: 5)
Energy Reports     Open Access   (Followers: 5)
Journal of Energy & Natural Resources Law     Hybrid Journal   (Followers: 5)
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 4)
Frontiers in Energy     Hybrid Journal   (Followers: 4)
International Journal of Nuclear Energy Science and Technology     Hybrid Journal   (Followers: 4)
Journal of Photochemistry and Photobiology B: Biology     Hybrid Journal   (Followers: 4)
Wind Energy     Hybrid Journal   (Followers: 4)
Strategic Planning for Energy and the Environment     Hybrid Journal   (Followers: 4)
International Journal of Sustainable Engineering     Hybrid Journal   (Followers: 4)
Dams and Reservoirs     Hybrid Journal   (Followers: 4)
Journal of Nano Energy and Power Research     Full-text available via subscription   (Followers: 4)
International Journal of Energy and Environmental Engineering     Open Access   (Followers: 4)
Science and Technology for Energy Transition     Open Access   (Followers: 4)
International Journal of Applied Power Engineering     Open Access   (Followers: 4)
Development of Energy Science     Open Access   (Followers: 4)
Journal of International Energy Policy     Open Access   (Followers: 4)
Foundations and Trends® in Renewable Energy     Full-text available via subscription   (Followers: 4)
International Journal of Energy and Statistics     Hybrid Journal   (Followers: 4)
Sustainable Energy, Grids and Networks     Hybrid Journal   (Followers: 4)
Journal of Energy Chemistry     Full-text available via subscription   (Followers: 4)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Energy, Mechanical, Material and Manufacturing Engineering     Open Access   (Followers: 4)
Journal of Fusion Energy     Hybrid Journal   (Followers: 3)
Journal of Photochemistry and Photobiology A: Chemistry     Hybrid Journal   (Followers: 3)
Journal of Photochemistry and Photobiology C: Photochemistry Reviews     Full-text available via subscription   (Followers: 3)
Global Energy Law and Sustainability     Hybrid Journal   (Followers: 3)
Science and Technology of Nuclear Installations     Open Access   (Followers: 3)
Power Technology and Engineering     Hybrid Journal   (Followers: 3)
Functional Materials Letters     Hybrid Journal   (Followers: 3)
Distributed Generation & Alternative Energy Journal     Hybrid Journal   (Followers: 3)
Sustainable Energy     Open Access   (Followers: 3)
Journal of Technology Innovations in Renewable Energy     Hybrid Journal   (Followers: 3)
Journal of Ocean Engineering and Marine Energy     Hybrid Journal   (Followers: 3)
International Journal of Coal Science & Technology     Open Access   (Followers: 3)
Energy and Emission Control Technologies     Open Access   (Followers: 3)
Asian Bulletin of Energy Economics and Technology     Open Access   (Followers: 3)
Protection and Control of Modern Power Systems     Open Access   (Followers: 3)
Sustainable Energy & Fuels     Hybrid Journal   (Followers: 3)
International Journal of Nuclear Knowledge Management     Hybrid Journal   (Followers: 2)
Progress in Nuclear Energy     Hybrid Journal   (Followers: 2)
Electricity Journal     Hybrid Journal   (Followers: 2)
Proceedings of the Institution of Civil Engineers - Energy     Hybrid Journal   (Followers: 2)
Gcb Bioenergy     Open Access   (Followers: 2)
Journal of Semiconductors     Full-text available via subscription   (Followers: 2)
EPJ Photovoltaics     Open Access   (Followers: 2)
International Journal of Clean Coal and Energy     Open Access   (Followers: 2)
Washington and Lee Journal of Energy, Climate, and the Environment     Open Access   (Followers: 2)
Journal of Energy in Southern Africa     Open Access   (Followers: 2)
Journal of Alternate Energy Sources & Technologies     Full-text available via subscription   (Followers: 2)
Journal of Nuclear Energy Science & Power Generation Technology     Hybrid Journal   (Followers: 2)
Nigerian Journal of Technological Research     Full-text available via subscription   (Followers: 2)
Journal of Energy     Open Access   (Followers: 2)
Energy Technology & Policy     Open Access   (Followers: 2)
Biofuel Research Journal     Open Access   (Followers: 2)
Green Energy & Environment     Open Access   (Followers: 2)
Materials Today Energy     Hybrid Journal   (Followers: 2)
Journal of Power and Energy Engineering     Open Access   (Followers: 2)
Clean Energy     Open Access   (Followers: 2)
Global Challenges     Open Access   (Followers: 2)
Carbon Resources Conversion     Open Access   (Followers: 2)
IET Smart Grid     Open Access   (Followers: 2)
IET Energy Systems Integration     Open Access   (Followers: 2)
International Journal of Nuclear Desalination     Hybrid Journal   (Followers: 1)
International Journal of Nuclear Hydrogen Production and Applications     Hybrid Journal   (Followers: 1)
Radioprotection     Hybrid Journal   (Followers: 1)
Nuclear Law Bulletin     Full-text available via subscription   (Followers: 1)
International Journal of Power and Energy Conversion     Hybrid Journal   (Followers: 1)
Clefs CEA     Full-text available via subscription   (Followers: 1)
Journal of Computational Multiphase Flows     Open Access   (Followers: 1)
Natural Resources     Open Access   (Followers: 1)
Journal of Sustainable Bioenergy Systems     Full-text available via subscription   (Followers: 1)
Open Journal of Energy Efficiency     Open Access   (Followers: 1)
Michigan Journal of Sustainability     Open Access   (Followers: 1)
Technology Audit and Production Reserves     Open Access   (Followers: 1)
Sustainable Energy Technologies and Assessments     Full-text available via subscription   (Followers: 1)
International Journal of Smart Grid and Green Communications     Hybrid Journal   (Followers: 1)
Clean Technologies     Open Access   (Followers: 1)
Energy Conversion and Management : X     Open Access   (Followers: 1)
Technology and Economics of Smart Grids and Sustainable Energy     Hybrid Journal   (Followers: 1)
Energy, Ecology and Environment     Hybrid Journal   (Followers: 1)
International Journal of Energy and Water Resources     Hybrid Journal  
BioPhysical Economics and Resource Quality     Hybrid Journal  
Geomechanics and Geophysics for Geo-Energy and Geo-Resources     Hybrid Journal  
BMC Energy     Open Access  
Journal of Energy and Environment Technology of Graduate School Siam Technology College     Open Access  
Global Energy Interconnection     Open Access  
Journal of Energy Systems     Open Access  
International Journal of Energy & Engineering Sciences     Open Access  
International Journal of Energy and Smart Grid     Open Access  
Turkish Journal of Energy Policy     Open Access  
Energy Informatics     Open Access  
High Voltage     Open Access  
Geomechanics for Energy and the Environment     Full-text available via subscription  
ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations     Open Access  
Journal of China Coal Society     Open Access  
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Universal Journal of Applied Science     Open Access  
Ingeniería Energética     Open Access  
E3S Web of Conferences     Open Access  
International Journal of Ambient Energy     Hybrid Journal  
CT&F - Ciencia, Tecnología y Futuro     Open Access  
Multequina     Open Access  
South Pacific Journal of Natural and Applied Sciences     Hybrid Journal  
Chain Reaction     Full-text available via subscription  
Wind Engineering     Hybrid Journal  
Nuclear Data Sheets     Full-text available via subscription  
International Journal of Nuclear Governance, Economy and Ecology     Hybrid Journal  

        1 2 | Last

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Nigerian Journal of Technological Research
Number of Followers: 2  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 0795-5111
Published by African Journals Online Homepage  [260 journals]
  • Assessment of epiphytic algae community as bioindicator of organic
           pollution: A case study of Orokubu Creek, Bille, Rivers State, Nigeria

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      Authors: O. A. Bubu-Davies , M. V. C. Ebini , P. A. Anwuri
      Pages: 1 - 10
      Abstract: Orokubu Creek, Bille, is a tidal estuary and tributary of the Centre of the New Calabar River, Niger Delta receiving organic anthropogenic effluents. The study investigated epiphyton assemblage from July to December 2019. Samples were collected from three stations (Frey-Boko, Oruama-Boko and Okpologio) and preserved. Epiphyton samples were identified microscopically. Phosphate (PO4), Sulphate (SO4) and nitrate (NO3), were analyzed in the laboratory. PO4 recorded (3.39±0.25 mg/L), SO4 (457.34±20.47 mg/L), NO3 (4.33±0.19 mg/L) and total organic carbon (2.46±0.16 mg/L). Phosphate and Sulphate were higher than 0.1 mg/L, and 100 mg/L recommended international standard. A total of 5 families, 28 genera and 70 species of periphyton assemblage were observed [Bacillariophyceae (16.83%), Chlorophyceae (26.85%), Cyanophyceae (22.81%), Pyrrophyceae (27.43%) and Chrysophyceae (6.08%)] at p<0.05. Bioindicator species found were Raphidiopsis Mediterranea, Phormidiaspp, Microcystis aeruginosa, Nitzschia sigma N. lanceolate N. acicularis, Navicularostellata, Cyclotella comta (Bacillariophyceae), Anabaena spiroides, A. planctonica, Lyngbyahieronymusii, (Cyanophyceae) and Gonyaulaxpolyhedra, Gymnodinium catenatum, G. breve, Prorocentrummican, P. reiculatum (Pyrrophyceae). Bacillariophyceae correlated positively with nitrate. High levels of phosphate and nitrate showed the study area is organically polluted. The polluted wastewater contains detergents used in washing clothes, badges, bunker hose, faecal deposit, gas flaring, illegal local refinery ovens waste and decayed organic log woods. The study, therefore, suggests regular monitoring of the surface water and epiphyton community of Orokubu Creek because of the various industries and houses around this creek.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
  • Germination patterns of some selected savannah seeds using various
           pre-sowing methods to assess seedlings growth responses in nursery

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      Authors: Noah Alabi Oyebamiji, Rasheedah Oyenike Suleiman, Kaseem Dele Salami
      Pages: 11 - 16
      Abstract: The study was carried out at Forest Nursery, Federal University Dutsin-Ma to evaluate germination patterns of some savannah seeds using various pre-sowing methods to assess growth responses in nursery. The experiment was laid out as 5 x 5 factorial in Randomized Complete Block Design (RCBD) with four replicates. The factors were; agroforestry tree seeds (AFTS); Acacianilotica (AN); Parkiabiglobosa (PB); Diospyrosmespiliformis (DMk); Detariummicrocapum (DMt); Adansoniadigitata (AD) and pre-sowing treatments; Seeds soaked in 60 % diluted Tetraoxosulphate (VI) acid (H2SO4) (A); mechanical scarification (Ms); hot water at 60° C (HW); seeds soaked in water for 24 hours (W); control (C). The data were analyzed using ANOVA at p = .05. Seed emergence started 6 days after sowing (DAS) in AN seed treated with H2SO4 for 5 minutes (AAN) and DMk seeds soaked in water for 24 hours (WDMk). AN seed soaked in H2SO4 for 5 minutes (AAN) and DMt seeds soaked in H2SO4 for 5 minutes (ADMt) gave the highest (60 % and 50 %) germination percentage respectively. AN and DMt seeds showed consistent significantly higher values (76.55, 187.50, 232.07, 325.50 and 506.05 and 0.34, 0.55, 0.63, 0.70 and 0.73) on number of leaves (NL) and collar diameters (CD) both at 2-10 WAS. A and W had significantly higher values (0.43, 0.50, and 0.56) and (0.40) on CD at 6-10 WAS and 4 WAS. In conclusion, AN and DMt were the best performing seeds, AAN were the best pre-sowing treatment. They are therefore recommended for forest improvement and establishment.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
  • Development and validation of correlations for liquid and vapour
           enthalpies and procedures for generating saturated vapour pressure for
           NH3–H2O solution

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      Authors: S. N. Mumah , H. F. Akande, K. Y. Mudi , I. O. Olaniyan , S. Francis
      Pages: 17 - 35
      Abstract: Liquid and vapour enthalpies and saturated vapour pressure correlations were developed using the Chebychev series approach to curve fitting for the liquid and vapour phases of NH3–H2O(ammonia-water) solutions using experimental data. The average percentage deviations of the compared values were significantly low (±0.73925 for the liquid phase enthalpies, ±1.596 for the vapour phase enthalpies and ±0.513 for saturated vapour pressures). Therefore, the correlations derived can be used to calculate the Liquid and vapour enthalpies of NH3–H2O solution. Furthermore, data generated for the two phases were compared with values generated from the commonly used models of Patek and Klomfar (1995). While data generated for the liquid phase enthalpies were comparable for the two procedures (±0.08805 percentage deviation), the same conclusion could not be reached for the vapour phase as the deviation of calculated enthalpies from the model developed in this work increased with an increase in temperature. Since the generation and comparison of vapour enthalpies requires saturated vapour pressure values of the NH3–H2O solution, the paper has inadvertently provided a corresponding procedure and correlations for calculating this property. The paper further identified temperature and NH3–H2O concentration ranges that generate reliable enthalpies values for the three properties.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
  • Determining the predictive model for drying characteristics of ripe
           plantain (Musa paradisiaca) slices using thin-layer models

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      Authors: R. M. Davies , E. W. Egbe
      Pages: 36 - 45
      Abstract: Vegetable drying is the most effective method for preserving agricultural products and is an energy-intensive process. The study investigated the effects of temperature and slice thick-ness on the moisture diffusivity effectiveness and the activation energy on dehydration kinetics of ripe plantain (Musa paradisiaca). Different slice thicknesses (3 mm, 4 mm and 5 mm) in a thin layer using a laboratory-convective oven dryer multiples of 10°C in the temperature range of 60 to 80°C were chosen and used. A suitable estimating thin-layer model was selected by fitting the results to the three thin-layer models of Lewis, Henderson, and Page. The parameters R2, RMSE, and X2, were used. It was observed that Henderson model R² ranged from 0.9064-0.996, RMSE ranged from 0.021838-0.000346 and X² ranged from 0.0017765712-0.0000000447730. Slice thickness increases with activation energy, and temperature increases with an increase in effective moisture diffusivity. As a result, the statistical analysis revealed that the Henderson model provided a reliable prediction for the drying characteristics of ripe plantain slices at the selected temperatures without a constant rate period but with the observed falling rate period.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
  • Effect of periwinkle shell on the physical and mechanical properties of
           sandcrete block

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      Authors: Iyinoluwa E. E. Davies, Emmanuel M. Adigio
      Pages: 46 - 54
      Abstract: Periwinkle shells are waste products derived from Periwinkles. They can be recycled and processed either as fine aggregate, coarse aggregate, filler, or cement replacement. This study investigates crushed periwinkle shells' suitability as an alternate material for natural sand in sandcrete hollow blocks for sustainable infrastructure. Tests, including the chemical compositions and physical properties of the natural sand and periwinkle shells aggregate materials, were investigated. In addition, mechanical properties such as compressive strength, density, and water absorption of the sandcrete blocks using periwinkle shells as a replacement for sand at 5%, 10%, 30%, and 50% were evaluated. The result of 28 days compressive strength of sandcrete hollow blocks showed that 5%, 10 %, and 30% periwinkle shell partial replacement met the minimum requirement recommended for compressive strength for non-load bearing blocks by Nigeria Industrial Standard (NIS 87: 2000) specification. Also, 28 days bulk densities result of sandcrete hollow blocks ranged between 1860.97 and 2008.10 Kg/m3. The water absorption tendency of the sandcrete blocks reduces as the dosages of periwinkle increase from 0 to 30%. Utilising periwinkle as a replacement for fine natural aggregate will enhance green products' promotion for sustainable infrastructure and reduce the periwinkle pollution menace. Maximising waste periwinkle shells will foster the actualisation of the United Nations Sustainable Development Goals.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
  • Evaluation of process parameters in the production of ethanol from
           agricultural waste

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      Authors: Sylvester Uwadiae, Osamagbe Aigbedion
      Pages: 55 - 60
      Abstract: The effect of temperature at which hydrolysis took place, hydrolysis and incubation times on percentage yield of ethanol using sawdust as biomass was investigated in this study. The collected sawdust was pretreated by soaking it in NaOH for 2 h and then boiled for 1 h at a temperature of 100°C. Enzymatic hydrolysis was thereafter carried out on the pretreated substrate by varying hydrolysis temperature (30-40°C), hydrolysis time (60-300 min). Thereafter, Saccharomyces cerevisiae was used for saccharification and fermentation which took place concurrently at varied incubation time (1-5 days). Box-Behnken design (BBD) in response surface methodology (RSM) using Design-Expert software was used to model and optimize the yield of ethanol using the selected process parameters. The production of ethanol from sawdust was positively influenced by all three process parameters. The optimum ethanol yield was 2.247 % at hydrolysis temperature, hydrolysis time, and an incubation time of 41.642 °C, 199.184 min and 3.546 days respectively. The very close values of the ethanol yields by the model and by the actual experiment performed at the optimal conditions validated the model.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
  • Aquatic macrophytes diversity and distribution: a case study of Ifewara
           Reservoir, Osun State, Nigeria

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      Authors: Oluwaseun Modupe Daisi, Israel Funsho Adeniyi, Patrick Oluwagbemiga Ayeku, Oyindamola Patricia Ogunmola
      Pages: 61 - 68
      Abstract: This study determined the species composition, diversity, distribution, spatio-temporal variations and community structure of macrophytes community in Ifewara reservoir, Osun State, Nigeria. Samples were collected from ten stations established over the three main basins of the reservoir (upper-flow, middle and lower basins). At each sampling station, plant species were collected and identified following standard procedures at the IFE Herbarium. The generated data were subjected to Clustal analysis, Principal Component Analysis (PCA) and Analysis of Variance (ANOVA). A total of 22 macrophytes species which belong to 17 genera and 13 families were recorded. The most dominant family was Onagraceae, which comprised four species. About two-thirds (65.2%) of the macrophtyes were of emergent form, with 30.4% as floating form, and 4.3% as submerged form. Azolla pinnata, Wolfia microscopica and Lemna minor were recorded only during the dry season with a record of about 22 species. PCA and Cluster analysis revealed a high correlation between upper and lower basins. The highest mean occurrence of 45.3±6.4% was recorded in the upper basin of the reservoir. The study concluded that the macrophytes community of the Ifewara reservoir was fairly diverse and most species were widely distributed.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
  • Economic analysis of smoked – dried fish marketing in Akinyele Local
           Government Area of Oyo State, Nigeria

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      Authors: A. Adeoye , A. O. Ayanboye , A. A. Oyeleye , S. A. Amao , A. M. Taiwo
      Pages: 69 - 76
      Abstract: Increased production of fish without increase in processing and marketing may lead to wastage of resources; therefore this study examined the economics analysis of smoked dried fish marketing in Akinyele LG, Oyo state, Nigeria. Multi-stage random sampling technique was used in data collection which was analyzed by descriptive and inferential statistics. The majority (90%) of the respondents were female with a mean age of 38 years; about 70% of the respondents were married and had formal education with an average household size of six persons. The majority did not belong to any marketing cooperative. The marketing margin was estimated at 42.43%, the gross margin profitability was N 913,000 per annum and the Benefit Cost Ratio was N 1.5. Major constraint include lack of capital, poor storage facility, poor transportation network while the size of production, cooperative association and educational level had a positive effect on the profitability of smoked fish marketing. Thus, marketers must form cooperative societies to get access to credit loans thereby increase profit. Also, provision of improved infrastructure such as modern processing equipment, good road network to increase the profitability of the marketers.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
  • Investigation into the flow and stabilization of Cu-water and Cu-Gallium
           magneto nanofluid in a porous media

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      Authors: Pius Erheyovwe Bubu, Chigozie Israel-Cookey, Valentine Benjamin Omubo-Pepple, Friday Barikpe Sigalo
      Pages: 77 - 90
      Abstract: The Rayleigh-Benard stability in liquid-metal nanofluids is investigated with somewhat emphasis on the behaviour of Brownian motion and thermophoresis of copper Cu nanoparticles. The critical Rayleigh number of the Cu-Ga decreases in not less than one order of magnitude as the modified magnetic Chandrasekhar number increases than that of the Cu-water nanofluids in Darcy and Darcy-Brinkman porous media. The Chebyshev spectral technique is used to resolved the resulting rigid-rigid boundary eigenvalue problem considered numerically. The numerical experimental results obtained for the effects of the modified magnetic Chandrasekhar number 𝑄, Nanoparticle Rayleigh number 𝑅𝑁, modified diffusivity ratio 𝑁𝐴, modified specific heat increment 𝑁𝐵, Lewis number 𝐿𝑒, Darcy number 𝐷𝑎 and porosity 𝜀on the stabilization of both the water-based and liquid-metal based nanofluids with copper nanoparticle- results for Cu-water and Cu-Ga are presented graphically and tabularly.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
  • Biochemicals extraction for sustainable feedstocks from dried leaves of
           Gmelina arborea

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      Authors: Haruna Ibrahim, Shamsudeen Abdulkarim Jibia, Suleiman Magaji, Ismail Muhammad
      Pages: 91 - 95
      Abstract: Research on biomass for the production of biochemicals is getting more attention to find suitable feedstocks for our industries capable of replacement of petrochemicals that are not only hazardous to our environment but with diminishing sources. In this study, 50g of pulverized dead waste dried Gmelina arborea leaves were hydrothermally extracted with 500 mL of distilled water over 0.5, 0.75 and 1.5g of ZnCl2 catalyst yielded 266 - 274.2g of fatty acids, 7.8 -18.5g 3-methyl butanol, 11.13 -16.09g furfural, 23.45 -26.32g α-farnesene, 20.8 -29.47 eugenol, 20.8 -25.26g phytol and 10.63 – 14.07g spathulenol. This method seems to be the cheapest for the production of biodiesel feedstock and feedstocks for food, agrochemicals, pharmaceuticals and cosmetic industries.
      PubDate: 2022-04-01
      Issue No: Vol. 17, No. 1 (2022)
       
 
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