Subjects -> AGRICULTURE (Total: 981 journals)
    - AGRICULTURAL ECONOMICS (93 journals)
    - AGRICULTURE (680 journals)
    - CROP PRODUCTION AND SOIL (120 journals)
    - DAIRYING AND DAIRY PRODUCTS (30 journals)
    - POULTRY AND LIVESTOCK (58 journals)

AGRICULTURE (680 journals)            First | 1 2 3 4     

Showing 401 - 263 of 263 Journals sorted alphabetically
Journal of Nuts     Open Access   (Followers: 1)
Journal of Plant Diseases and Protection     Hybrid Journal   (Followers: 1)
Journal of Plant Stress Physiology     Open Access  
Journal of Population Economics     Hybrid Journal   (Followers: 31)
Journal of Resources Development and Management     Open Access   (Followers: 3)
Journal of Rubber Research     Hybrid Journal   (Followers: 1)
Journal of Rural and Community Development     Open Access   (Followers: 1)
Journal of Science and Engineering     Open Access  
Journal of Science and Research     Open Access   (Followers: 2)
Journal of Science and Technology (Ghana)     Open Access   (Followers: 3)
Journal of Science Foundation     Open Access   (Followers: 1)
Journal of Scientific Agriculture     Open Access  
Journal of Social Sciences and Humanities Review     Open Access  
Journal of Sugar Beet     Open Access  
Journal of Sugarcane Research     Open Access   (Followers: 2)
Journal of Sustainable Society     Open Access   (Followers: 2)
Journal of the American Oil Chemists' Society     Hybrid Journal   (Followers: 2)
Journal of the Bangladesh Agricultural University     Open Access  
Journal of the Ghana Science Association     Full-text available via subscription   (Followers: 3)
Journal of the Indian Society of Coastal Agricultural Research     Open Access   (Followers: 1)
Journal of the Indian Society of Soil Science     Open Access   (Followers: 1)
Journal of the Saudi Society of Agricultural Sciences     Open Access  
Journal of the Science of Food and Agriculture     Hybrid Journal   (Followers: 15)
Journal of Vegetable Science     Hybrid Journal   (Followers: 5)
Journal of Wine Research     Hybrid Journal   (Followers: 3)
Jurnal Agroekoteknologi     Open Access  
Jurnal AGROSAINS dan TEKNOLOGI     Open Access  
Jurnal Agrotek Tropika     Open Access  
Jurnal Agroteknologi     Open Access  
Jurnal BETA (Biosistem dan Teknik Pertanian)     Open Access  
Jurnal Ilmiah Ilmu Terapan Universitas Jambi : JIITUJ     Open Access  
Jurnal Ilmiah Pertanian     Open Access  
Jurnal Ilmu dan Kesehatan Hewan (Veterinary Science and Medicine Journal)     Open Access   (Followers: 1)
Jurnal Ilmu Kehutanan     Open Access  
Jurnal Ilmu Kelautan Spermonde     Open Access  
Jurnal Ilmu-Ilmu Pertanian Indonesia     Open Access  
Jurnal Ilmu-Ilmu Peternakan     Open Access  
Jurnal Medika Veterinaria     Open Access  
Jurnal Pengabdi     Open Access  
Jurnal Pertanian Terpadu     Open Access  
Jurnal Rekayasa dan Manajemen Agroindustri     Open Access  
Jurnal Sain Veteriner     Open Access  
Jurnal Tanah Tropika     Open Access  
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)     Open Access  
Jurnal Teknologi & Industri Hasil Pertanian     Open Access  
Jurnal Teknologi dan Industri Pertanian Indonesia     Open Access  
Jurnal Teknologi Pertanian     Open Access  
Jurnal Udayana Mengabdi     Open Access  
Jurnal Veteriner     Open Access   (Followers: 1)
Kansas Agricultural Experiment Station Research Reports     Open Access  
La Calera     Open Access  
La Granja : Revista de Ciencias de la Vida     Open Access  
La Técnica : Revista de las Agrociencias     Open Access  
Laimburg Journal     Open Access  
Landbohistorisk Tidsskrift     Open Access  
Landtechnik : Agricultural Engineering     Open Access  
Latin American Perspectives     Hybrid Journal   (Followers: 15)
Livestock Science     Hybrid Journal   (Followers: 5)
Magazín Ruralidades y Territorialidades     Full-text available via subscription   (Followers: 1)
Majalah Ilmiah Peternakan     Open Access   (Followers: 1)
Malaysian Journal of Sustainable Agriculture     Open Access  
Margin The Journal of Applied Economic Research     Hybrid Journal   (Followers: 1)
Maskana     Open Access  
Measurement : Food     Open Access   (Followers: 1)
Media, Culture & Society     Hybrid Journal   (Followers: 41)
Mesopotamia Journal of Agriculture     Open Access  
Meyve Bilimi     Open Access  
Middle East Journal of Science     Open Access  
Millenium : Journal of Education, Technologies, and Health     Open Access  
Mind Culture and Activity     Hybrid Journal   (Followers: 10)
Molecular Horticulture     Open Access   (Followers: 1)
Multiciencias     Open Access  
Mundo Agrario     Open Access  
Mustafa Kemal Üniversitesi Tarım Bilimleri Dergisi     Open Access  
Mustafa Kemal Üniversitesi Ziraat Fakültesi Dergisi     Open Access  
Mycopath     Open Access  
Mycorrhiza     Hybrid Journal   (Followers: 5)
National Institute Economic Review     Hybrid Journal   (Followers: 8)
Nativa     Open Access  
Nature Plants     Full-text available via subscription   (Followers: 15)
Nepal Journal of Science and Technology     Open Access  
Nepalese Journal of Development and Rural Studies     Open Access  
New Journal of Botany     Hybrid Journal   (Followers: 6)
New Zealand Journal of Agricultural Research     Hybrid Journal   (Followers: 2)
Nexo Agropecuario     Open Access  
Nigeria Agricultural Journal     Full-text available via subscription  
Nigerian Food Journal     Full-text available via subscription   (Followers: 2)
Nigerian Journal of Biotechnology     Open Access  
Nigerian Journal of Technological Research     Full-text available via subscription   (Followers: 1)
NJAS : Wageningen Journal of Life Sciences     Hybrid Journal  
Nutrient Cycling in Agroecosystems     Open Access   (Followers: 1)
Oilseeds and fats, Crops and Lipids     Open Access  
Open Agriculture Journal     Open Access  
Open Journal of Soil Science     Open Access   (Followers: 9)
Organic Agriculture     Hybrid Journal   (Followers: 5)
Organic Farming     Open Access  
OUSL Journal     Open Access  
Outlook on Agriculture     Full-text available via subscription   (Followers: 6)
Outlooks on Pest Management     Full-text available via subscription   (Followers: 2)
Oxford Development Studies     Hybrid Journal   (Followers: 36)
Oxford Economic Papers     Hybrid Journal   (Followers: 46)
Oxford Review of Economic Policy     Hybrid Journal   (Followers: 26)
Pacific Conservation Biology     Full-text available via subscription   (Followers: 2)
Paddy and Water Environment     Hybrid Journal   (Followers: 9)
Parallax     Hybrid Journal   (Followers: 8)
Park Watch     Full-text available via subscription   (Followers: 1)
Partners in Research for Development     Full-text available via subscription  
Pastoralism : Research, Policy and Practice     Open Access   (Followers: 2)
Pastos y Forrajes     Open Access  
Pastura : Journal Of Tropical Forage Science     Open Access  
Pedobiologia     Partially Free   (Followers: 2)
Pedosphere     Full-text available via subscription   (Followers: 1)
Peer Community Journal     Open Access   (Followers: 5)
Pelita Perkebunan (Coffee and Cocoa Research Journal)     Open Access  
Perspectivas Rurales Nueva Época     Open Access  
Pest Management Science     Hybrid Journal   (Followers: 3)
Phytopathology Research     Open Access  
Plant Knowledge Journal     Open Access   (Followers: 1)
Plant Phenome Journal     Open Access   (Followers: 1)
Plant Phenomics     Open Access   (Followers: 1)
Potato Journal     Open Access   (Followers: 1)
Potato Research     Hybrid Journal   (Followers: 2)
Practical Hydroponics and Greenhouses     Full-text available via subscription  
Precision Agriculture     Hybrid Journal   (Followers: 10)
PRIMA : Journal of Community Empowering and Services     Open Access  
Proceedings of the Vertebrate Pest Conference     Open Access  
Producción Agropecuaria y Desarrollo Sostenible     Open Access  
Professional Agricultural Workers Journal     Open Access  
Progress in Agricultural Engineering Sciences     Full-text available via subscription  
Progressive Agriculture     Open Access   (Followers: 1)
Quaderns Agraris     Open Access  
Rafidain Journal of Science     Open Access  
Rangeland Ecology & Management     Full-text available via subscription   (Followers: 4)
Rangelands     Full-text available via subscription   (Followers: 1)
Rangifer     Open Access  
Recent Research in Science and Technology     Open Access  
Recursos Rurais     Open Access  
Rekayasa     Open Access  
Renewable Agriculture and Food Systems     Hybrid Journal   (Followers: 15)
Reproduction and Breeding     Open Access  
Research & Reviews : Journal of Agricultural Science and Technology     Full-text available via subscription  
Research & Reviews : Journal of Agriculture Science and Technology     Full-text available via subscription  
Research Ideas and Outcomes     Open Access  
Research in Agriculture, Livestock and Fisheries     Open Access   (Followers: 1)
Research in Plant Sciences     Open Access  
Research in Sierra Leone Studies : Weave     Open Access  
Research Journal of Seed Science     Open Access  
Review of Agrarian Studies     Open Access  
Revista Bio Ciencias     Open Access  
Revista Brasileira de Agropecuária Sustentável     Open Access  
Revista Brasileira de Ciências Agrárias     Open Access  
Revista Brasileira de Higiene e Sanidade Animal     Open Access   (Followers: 1)
Revista Brasileira de Tecnologia Agropecuária     Open Access  
Revista Brasileira de Zootecnia     Open Access   (Followers: 1)
Revista Chapingo. Serie horticultura     Open Access  
Revista Ciencia y Tecnología El Higo     Open Access  
Revista Ciência, Tecnologia & Ambiente     Open Access  
Revista Ciencias Técnicas Agropecuarias     Open Access  
Revista Colombiana de Investigaciones Agroindustriales     Open Access  
Revista Cubana de Ciencia Agrícola     Open Access   (Followers: 2)
Revista de Agricultura Neotropical     Open Access  
Revista de Ciências Agrárias     Open Access  
Revista de Ciencias Agrícolas     Open Access  
Revista de Ciências Agroveterinárias     Open Access  
Revista de Direito Agrário e Agroambiental     Open Access  
Revista de Investigación en Agroproducción Sustentable     Open Access  
Revista de Investigaciones Altoandinas - Journal of High Andean Research     Open Access  
Revista de la Ciencia del Suelo y Nutricion Vegetal     Open Access  
Revista de la Facultad de Agronomía     Open Access  
Revista de la Facultad de Agronomía     Open Access  
Revista de la Universidad del Zulia     Open Access  
Revista Eletrônica Competências Digitais para Agricultura Familiar     Open Access  
Revista Iberoamericana de Bioeconomía y Cambio Climático     Open Access   (Followers: 1)
Revista Iberoamericana de las Ciencias Biológicas y Agropecuarias     Open Access  
Revista Iberoamericana de Tecnologia Postcosecha     Open Access  
Revista Iberoamericana de Viticultura, Agroindustria y Ruralidad     Open Access  
Revista Ingeniería Agrícola     Open Access  
Revista Investigaciones Agropecuarias     Open Access   (Followers: 3)
Revista Latinoamericana de Estudios Rurales     Open Access  
Revista Mexicana de Ciencias Agrícolas     Open Access  
Revista Mundi Meio Ambiente e Agrárias     Open Access  
Revista U.D.C.A Actualidad & Divulgación Científica     Open Access  
Revista Universitaria del Caribe     Open Access  
Revista Verde de Agroecologia e Desenvolvimento Sustentável     Open Access   (Followers: 2)
Revue Marocaine des Sciences Agronomiques et Vétérinaires     Open Access  
RIA. Revista de Investigaciones Agropecuarias     Open Access   (Followers: 1)
Rice     Open Access   (Followers: 1)
Rice Science     Open Access   (Followers: 1)
Rivista di Studi sulla Sostenibilità     Full-text available via subscription   (Followers: 1)
Rona Teknik Pertanian     Open Access  
RUDN Journal of Agronomy and Animal Industries     Open Access  
Rural China     Hybrid Journal   (Followers: 2)
Rural Sustainability Research     Open Access   (Followers: 2)
RURALS : Review of Undergraduate Research in Agricultural and Life Sciences     Open Access   (Followers: 1)
SAARC Journal of Agriculture     Open Access  
Sabaragamuwa University Journal     Open Access  
Sainteknol : Jurnal Sains dan Teknologi     Open Access  
Savana Cendana     Open Access  
Savannah Journal of Research and Development     Open Access  
Science and Technology Indonesia     Open Access  

  First | 1 2 3 4     

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Nigerian Journal of Biotechnology
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 0189-1731
Published by African Journals Online Homepage  [261 journals]
  • Effects of light intensity and photoperiod on growth, lipid accumulation
           and fatty acid composition of Desmodesmus subspicatus LC172266 under
           photoautotrophic cultivation

    • Authors: I.O. Ogbonna, J. Ikwebe, J.C. Ogbonna, C.N. Eze, J.B. Ndrimbula
      Pages: 1 - 13
      Abstract: Microalgae oil accumulation in their natural growing states hardly reaches the quantities needed to replace fossil-derived diesel. Therefore, for algae to be used as biofuel feedstock, their growths are manipulated with the aim of achieving high cell density and high lipid accumulation. Two major factors affecting microalgal biomass and lipid productivity are light intensity and photoperiod. In the present study, Desmodesmus subspicatus was grown photoautotrophically under varying light intensities and photoperiods with a view to assessing the growth, lipid accumulation potential and fatty acid composition. Whereas the optimal light intensity for biomass production of the microalga was 5000 lx, that for lipid productivity was 3500 lx. At 5000 lx and 18: 6 h light/dark cycle, biomass yield, lipid content and lipid productivity were highest, at values of 1.92 ± 0.03 g/L, 53% and 118.80 ± 2.04 mgL-1day -1 respectively. The major fatty acid of the alga was oleic acid irrespective of light changes. The quantities of lipid accumulated and the properties of the fatty acid methyl esters showed that Desmodesmus subspicatus LC172266 is an ideal feedstock for biodiesel production.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.1
      Issue No: Vol. 38, No. 2 (2022)
       
  • Effect of different extraction methods on micro-component composition and
           oxidative stability of oil produced from African pear (Dacryodes edulis)
           mesocarp Oil

    • Authors: U.A. Onwuzuruike, C.J. Okakpu, J. Ndife, U.C. Uzochukwu, O. Ubochi
      Pages: 14 - 23
      Abstract: Three different methods, including Soxhlet, traditional and screw press, were used to extract oil from African pear pulp. The oils were analysed for selected minerals and phytonutrients; stored for 4 weeks and analysed for oxidative changes. The microcomponents results ranged from 0.00 to 41.50% for chlorophyll, 0.00 to 1.25 µg/100g for total carotenoids, 0.02 to 0.04 mg/100g for iron, 0.00 to 0.01 mg/100g for copper, and 18.25 to 208.50 mg/100g for vitamin E. The oxidative stability results showed that peroxide values ranged from 0.13 to 2.69 meq O2/kg in week 1 to 0.92 to 3.62 meq O2/kg in week 4; FFA ranged from 0.36 to 7.04% in week 1 to 0.39 to 11.47% in week 4; density ranged from 0.89 to 0.91 g/cm3 in week 1 to 0.91 to 0.98 g/cm3 in week 4; viscosity ranged from 17.17 to 51.57 RVU in week 1 to 20.31 to 55.05 RVU in week 4 and thiobarbituric acid level ranged from 0.02 to 1.11 mg/g in week 1 to 0.09 to 1.31 mg/g in week 4. Soxhlet extraction method produced oil of best quality with significantly (p < 0.05) higher mineral and phytonutrient contents, and of a longer storage stability.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.2
      Issue No: Vol. 38, No. 2 (2022)
       
  • Quality Assessment of Strips produced from Soybean and Cassava Flour
           Blends

    • Authors: U.A. Onwuzuruike, K.G. Okakpu, J. Ndife, U.C. Uzochukwu, E.U. Abiamere
      Pages: 24 - 39
      Abstract: This study evaluated the quality characteristics of strips produced from blends (%) of soybean and cassava flours. Wholesome cassava roots and soybean grains were procured and processed into flours. Seven blends of soybean and cassava flour blends were formulated (0:100, 100:0, 50:50, 40:60, 20:80, 60:40 and 80:20) while 100% wheat flour served as control. Strips were produced from the blends. The composite flours were analyzed for their functional properties while the proximate, mineral, vitamin, antinutrient contents and sensory characteristics (assessed by 25 panelists) of the strips were assessed. The statistical analysis was carried out using one-way ANOVA at 95% confidence level. The functional properties ranged from 0.53 to 0.77 g/mL for bulk density, 3.76 to 12.88% for foam capacity, 1.92 to 49.00% for foam stability, 108.00 to 204.00 g/mL for oil absorption capacity, 81.00 to 140.50 g/mL for water absorption capacity and 61.07 to 87.00°C for gelatinization temperature. The results of proximate analysis ranged from 1.44 to 3.46% for moisture, 1.63 to 3.91% for ash, 2.04 to 10.76% for fat, 0.18 to 1.37% for crude fibre, 4.07 to 24.16% for protein and 60.46 to 88.10% for carbohydrate. The phytate, tannin, trypsin inhibitor, saponin and hydrogen cyanide ranged from 0.22 to 5.59 mg/100g, 0.34 to 4.13 mg/100g, 0.04 to 1.69 mg/100g, 0.02 to 0.36 mg/100g and 0.00 to 2.11 mg/100g respectively. Sensory analysis revealed that 80% soybean flour and 20% cassava flour possessed better organoleptic characteristics. Production of strips from blends of soybean and cassava flours improved the nutrient composition, sensory properties with acceptable/safe antinutrient limit which can be optimized for value addition.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.3
      Issue No: Vol. 38, No. 2 (2022)
       
  • Pesticide Potential of Gmelina arborea Stem Bark and Leaf Powder against

    • Authors: W.C. John, M. Ishaya, T.A. Ihum, A.O. Oladejo, J.O. Oyorinde, C.J. Ukanyirioha, O.C. Matthias
      Pages: 40 - 46
      Abstract: Insect pest are a major problem to food security, most especially in developing countries like Nigeria. There is an urgent need towards mitigating the effects of these group of insects, and botanical extracts had played an increasing role as an alternative insecticide. The aim of the present study is to investigate the anti-feeding effect of different dosage of Gmelina arborea stem bark and leaf powder against Dinoderus porcellus infesting yam chips. The study was conducted at the Entomology Laboratory of Federal College of Forestry, Jos. Soxhlet extraction using methanol was used to extract plant part samples. Presence of phytochemicals contained in the plant were examined following standard protocols. The antifeedant effects of different dosage of Gmelina arborea leaf and stem bark powder on Dinoderus porcellus was determined by monitoring yam chips weight loss. Data collected was subjected to analysis of variance (ANOVA) at 1 % level of significance and the means separated using Duncan test. The results revealed presence of tannin, flavoid, saponins, alkaloids, reducing sugar and phenol with absence of steroid. The results also revealed that the various dosages have remarkable antifeedant effect on the development of D. porcellus. The weight loss of treated yam chips was significantly different from those of untreated yam chips. Therefore, the results obtained in this work accounts for the use of G. arborea plant parts powders as bio-preservative for yam chips against D. porcellus.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.4
      Issue No: Vol. 38, No. 2 (2022)
       
  • In vitro antifungal activities of mancozeb/phytosynthesized zinc oxide
           nanoparticles against Eurotium sp. isolated from diseased cassava plant
           (Manihot esculenta Crantz)

    • Authors: O.H. Obiazikwor, J.I. Ojeile
      Pages: 47 - 55
      Abstract: Nanoparticles are substances ranging from 1 – 100 nm in size and they have improved property such as increased surface area to volume ratio. In this study, in vitro antifungal activities of mancozeb/phytosynthesized zinc oxide nanoparticles against Eurotium sp. isolated from diseased cassava  plants (Manihot esculenta crantz) were determined. Zinc oxide (ZnO) nanoparticles was synthesized using Moringa leaf extract and characterization  of the biosynthesized nanoparticles was done using UV-Vis spectrophotometer. Different combinationsof zinc oxide nanoparticles and mancozeb were prepared corresponding to 25/75, 50/50 and 75/25 ZnO nanoparticles/mancozeb respectively. Antifungal testing using the test  nanoparticles/mancozeb combinations was carried out using thefood poisoning method. The results obtained from this study indicate that zinc oxide nanoparticles/mancozeb combinations significantly inhibited the growth of the test pathogen with varying rates of inhibition. One hundred percent (100 %) inhibition of Eurotium sp. was obtained by 25/75, 75/25 and 100 % nanoparticles treatments. Future direction to this study is to investigate how ZnO nanoparticles/mancozeb combinations could be used for crop protection against phytopathogens. The mode of action of the test nanoparticles should be further investigated.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.5
      Issue No: Vol. 38, No. 2 (2022)
       
  • Characterization of Novel Alkaline Protease producing Bacillus subtilis
           C3a-FIIRO with Potential for Industrial Application

    • Authors: F.A. Fashola, O.T. Fadipe, P.N. Nwagala, S.O. Olatope, C.P. Augustine, O.I. Ibidapo, I.C. James, F.B. Aderinwale, F.A. Orji, A.K. Lawal
      Pages: 56 - 66
      Abstract: Microbial alkaline protease is one of the dominant industrial enzymes which function in splitting polypeptides chain of protein into monomers of amino acids and peptides. This study aimed to identify alkaline protease produced by Bacillus sp. Soil samples were aseptically collected from dump sites in FIIRO, Lagos state, Nigeria. The samples were serially diluted, and bacteria were isolated using pour plate method. The resulting isolates were screened and morphologically characterized. The isolate with the highest protease production potential was subjected to biochemical characterization using Analytical Profile Index (API) identification kit system and 16S rRNA sequencing. The selected isolate was used to produce alkaline protease by solid state fermentation using rice bran as a substrate. Out of the 18 bacteria isolated, 11 isolates showed alkaline protease production potential. Isolate C3a-FIIRO was selected for its maximal alkaline protease produced as indicated by a 56 mm zone of clearance. Morphological and biochemical characterization revealed isolate C3a-FIIRO as a member of the genus Bacillus. The 16S rRNA gene sequencing confirmed the isolate as Bacillus subtilis C3aFIIRO (MW577298) with closest homology to Bacillus subtilis Y17B. The enzyme activity of 6848.171 U/ml ± 0.11 and protein concentration of 152.13 mg/ml ± 0.003 showed that Bacillus subtilis C3a-FIIRO has potential for sustainable alkaline protease production.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.6
      Issue No: Vol. 38, No. 2 (2022)
       
  • The Influence Of Metal Ions On Cellulolytic Activities Of Fungal Isolates
           From Palm Biomass

    • Authors: D.C. Onyia, E.C. Onyeneke, T. Okunwaye, E.O. Okogbenin, N.U. Asiriuwa, J.U. Obibuzor, H. Anemene
      Pages: 67 - 72
      Abstract: Numerous metal ions and chemical compounds can influence the activity of some fungi. Some have inhibitory effects whereas others have enhancing effects. In this study, the effect of metallic chlorides; lead II chloride (PbCl2), potassium chloride (KCl), copper II chloride (CuCl2), calcium II chloride (CaCl2), manganese II chloride (MnCl2), iron III chloride (FeCl3) and mercury II chloride (HgCl2) were evaluated for their influence on the cellulolytic activity of seven (7) fungal isolates at a concentration of 0.005M at 30°C for four (4) days using 3, 5-dinitrosalicyclic acid (DNS) method. CaCl2 had the highest influence on the cellulolytic activity for all the fungal isolates as compared to the control. In the presence of CaCl2, Trichoderma species (C) showed a high cellulolytic activity of 2.28x10-5 mmol/min/ml, Rhizopus, Trichoderma and Aspergillus species (A, B and E) had activities of 1.72 x10-5 ,1.65 x10-5 and 1.68 x10-5 mmol/min/ml respectively. HgCl2 and CuCl2 had the least influenced on the cellulolytic activity of all the fungal isolates. This, therefore, suggests that calcium ion activates the cellulase activity of the fungal species while HgCl2, PbCl2, KCl, CuCl2, MnCl2 and FeCl3 had a retarding effect on the cellulolytic activity.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.7
      Issue No: Vol. 38, No. 2 (2022)
       
  • Potential of Internet of Things and Semantic Web Technologies in the
           Health Sector

    • Authors: M.O. Edeh, E.E. Otto, N.E. Richard-Nnabu, S.G. Ugboaja, C.C. Umoke, D. Omachi
      Pages: 73 - 83
      Abstract: Science and technology have become essential components of healthcare. The emergence of Artificial intelligence (AI), Blockhain, mobile techs, Internet of Things (IoT) and Semantic Web Technologies (SWTs) etcetera have amplified the growing influence of technology in global health systems. IoT and SWTs in particular are seen as the next-generation technologies that can revolutionize global health systems. Thus, this paper examines the various potentials of IoT and SWTs in the health sector, with a view to creating more awareness regarding its prospects and associated risks, and also to assist stakeholders to maximize its possibilities to enrich healthcare delivery. We deduced that both IoT and SWTs harbour promising features that are now being deployed in the health sector to enhance quality service delivery, medical research and innovations, smart health, telemedicine, communications, patient care and effective health outcomes just to mention but a few. We conclude that the adoption and implementation of IoT-based devices and SWTs will be significant in sustainability and improvement of healthcare systems in the future. However, privacy and medical data security remains a major source of concern to many stakeholders.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.8
      Issue No: Vol. 38, No. 2 (2022)
       
  • Characterization of Some Novel Antimicrobial Peptides from African Common
           Toad, Sclerophrys regularis

    • Authors: A. Aliyu, Y.K.E. Ibrahim, B.A. Tytler
      Pages: 84 - 91
      Abstract: The growing number of antimicrobial resistant bacteria have necessitated urgent need for newer and effective antimicrobials. Antimicrobial peptides (AMPs) which are also called host defense peptides are promising class of bioactives found in all living thing especially amphibians. A total of 355 Sclerophrys regularis were collected and each toad was weighed and 0.02mL/g of epinephrine (1mg/mL) was administered via the dorsal lymph sac of the toad. The skin secretions were washed, lyophilized and stored at -20°C. The secretion was purified using Sephadex G-50 gel purification column. The fractions showing antimicrobial activities against Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922, Salmonella typhii ATCC 14028, Citrobacter freundii ATCC 8090, Staphylococcus aureus ATCC 25913 and Candida albicans ATCC 3147 were further purified by RP- HPFC. The purified fractions were lyophilized and m/z ratio peaks were determined using MALDI TOF/TOF MS. The sequences corresponding to the peaks were determined using Mascot Peptide Mass Fingerprint which revealed novel AMP sequences: IHAGKTVPIVK, MHLLWR and LTGQIKNGLSGR which were named Regularin-2, Regularin-3 and Regularin-4 respectively. The MICs of purified fractions were between 50 – 200 µg/mL and the antimicrobial activities were maintained when stored at -20 °C for 180 days and was significant at p < 0.05. Bioprospecting of Nigerian toad specie (S. regularis) could yield potential therapeutic AMP agents.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.9
      Issue No: Vol. 38, No. 2 (2022)
       
  • Optimizing the Effect of pH and Temperature on Atrazine Degradation by
           Bacillus safensis strain BUK_BCH_BTE6 an Efficient Atrazine Tolerating
           Bacteria from an Agricultural Soil in Kura Local Government Area of Kano
           State, Nigeria

    • Authors: F. Muhammad, F. Yusuf, F.A. Ahmad, U. Shehu, H.M. Yakasai
      Pages: 92 - 100
      Abstract: The widespread and long term use of atrazine results in high residue levels of atrazine in soil, which further causes water contamination, it is considered as an endocrine disruptor and is potentially carcinogenic. Microbial degradation of herbicide represents a time cost effective way of eco-restoration. This research was aimed at isolating and characterizing bacteria capable of degrading and utilizing atrazine as a sole carbon source. An enrichment method was used to isolate the bacteria on mineral salt media (MSM) following serial dilution. The isolate was identified morphologically, biochemically and molecularly as Bacillus safensis strain BUK_BCH_BTE6 based on 16S rRNA gene sequence and molecular phylogenetic analysis. The effect of pH and temperature on the degradation of atrazine was studied in MSM medium supplemented with atrazine as sole carbon source. Growth and degradation of atrazine in this isolate was optimal at pH 7.5 and temperature of 35 °C. Bacillus safensis is highly efficient in atrazine degradation with an optimum range of pH and temperature. Bacillus safensis could be a suitable candidate for bioremediation of atrazine polluted sites.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.10
      Issue No: Vol. 38, No. 2 (2022)
       
  • Cytological Study of 2n Pollen Formation in Musa

    • Authors: M.T.V. Adeleke, M. Pillay, B.E. Okoli
      Pages: 101 - 108
      Abstract: Current Musa breeding strategies are complex and time consuming involving the selection of tetraploids from 3x - 2x crosses. Secondary triploids are then obtained by crossing these tetraploids with diploids. Considering the very low hybrid seed set, routine embryo rescue procedures of hybrid seeds and the long growth cycle of banana, it takes approximately 10 - 12 years to produce an acceptable banana hybrid. The banana breeding process could benefit tremendously if triploid bananas could be obtained directly from 2x - 2x crosses through the process of unilateral sexual polyploidization. There are few reports on the mechanisms through which Musa species produce 2n pollen. This study investigated the type of meiotic irregularities that lead to 2n pollen formation in diploid, triploid and tetraploid Musa accessions using cytological analyses. The results showed that aberrations in cytokinesis and karyokinesis during microsporogenesis are possible mechanisms for 2n pollen formation in Musa. The meiotic aberrations described in this study have implications for Musa breeding. It appears that 2n pollen formation in Musa occurs via both first division restitution (FDR) and second division restitution (SDR). FDR is said to be more promising in transferring more heterozygosity from parents to offspring.

      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.11
      Issue No: Vol. 38, No. 2 (2022)
       
  • Genetic Diversity Of Andropogon Species With Different Microsatellite
           Markers For Better Selection And Improvement

    • Authors: B.T. Akinyemi, O.A. Okukenu, P.A. Dele, O.B. Kalenikanse, M. Wheto, F. Sanda, A.O. Jolaosho
      Pages: 109 - 117
      Abstract: Pastures have over the years been selected for important traits and their breeding has resulted in some high yielding forage grasses with great adaptive and population expansion traits. The research was carried out to study genetic diversity of nine Andropogon spp. sourced from Remo zone of Ogun State using four microsatellite markers (Phil227562, Xcup63, CTM59, and Xcup14). Genomic DNA was extracted from succulent leaf part of Andropogon grass using DNA extraction procedure of Zymo spin™ technology. Every one of the loci–populace is in with Hardy–Weinberg equilibrum. A sum of eight alleles were noticed and the quantity of alleles per locus has an estimation of 2.00, while the number of alleles ranged from 1.528 (Phil227562) to 1.946 (Xcup63). The viable number of alleles was lesser than noticed number at all the loci. The Shannon's Information Index differed among the loci with 0.530 (Phil227562) to 0.679 (Xcup63) though Inbreeding coefficient across the Andropogon grass clones was negative (mean = - 0.429), going from 0.07 (Phil 227562) to 0.714 (Xcup63) with 100% polymorphic loci. The noticed heterozygosity was higher than expected heterozygosity for all markers of the grass considered.
      PubDate: 2022-03-03
      DOI: 10.4314/njb.v38i2.12
      Issue No: Vol. 38, No. 2 (2022)
       
  • Vermiremediation Potentials of Lumbricus terrestris and Eudrilus euginae
           in Heavy Metal Contaminated Soil from Mechanic, Welder workshop and
           Metallic Dumpsite

    • Authors: P.O. Iheme, A.T. Ajayi, K.O. Ayo-Komolafe, K.L. Njoku
      Pages: 118 - 133
      Abstract: The need to reclaim contaminated soils is important in ensuring the sustainability of life and biodiversity. Food crops grown in heavy metal contaminated soils have the risk of passing the accumulated metals to man and such has been demonstrated to cause various diseases in man. In this study, we investigated the potentials to reclaim heavy metal contaminated soil using Eudrilus euginae and Lumbricus terrestris. The contaminated soils were obtained from mechanic, welder and metallic workshops and were grouped individually and as combinations. The soils were incubated with the earthworms and the quantities of heavy metals in soil were determined before and after the growth of the earthworms. The percentage of the heavy lost from soils at the end of the study was calculated to evaluate the ability of the earthworm to enhance the remediation of heavy metal contaminated soil. The presence of the earthworms led to more reduction of the levels of the heavy metals in the soils than natural attenuation. The presence of L. terrestris led to a lower reduction of Cd, Cr and Pb in the combined soil from the three sites but a greater reduction of Zn and Ni from such soil. The presence of E. euginae led to greater loss of all the heavy metals in the soil from the welder workshop and greater loss of Cd, Pb, Ni and Zn in the soil the mechanic
      workshop than L. terrestris. The presence of E. euginae led to more loss of Cr, Pb, and Ni in combined soils of mechanic and welder workshops and mechanic workshop and metallic dumpsite. The findings of this study show that although the presence of both earthworms enhanced the remediation of heavy metals from the soils, the efficiency of the remediation is organism-specific and site-specific. Study on detailed mechanisms of enhancing heavy metals by earthworms is recommended.
      PubDate: 2022-05-05
      DOI: 10.4314/njb.v38i2.13
      Issue No: Vol. 38, No. 2 (2022)
       
  • Effects Of Nitrogen Concentrations On The Biomass, Lipid And Biodiesel
           Production Potentials Of Spirogyra Specie

    • Authors: A. Salisu, B. Umar, J. Appah, V.O. Aina, Y. Tanimu, U. Yahaya
      Pages: 134 - 139
      Abstract: The international dependence on non-renewable power supply including fossil fuels has led the sector toward power insecurity. This has necessitated the worldwide attempt to reduce the dependence on  fossil fuels and broaden an economically feasible and scalable alternative  fuel supply so that it will  additionally lessen huge emissions of CO2 within side the  surroundings which in flip will result in  discount environmental pollution. Biofuels have the  potentials to offer a feasible opportunity to fossil  fuels and can lessen overall CO2 emissions.  Algae appear like a rising supply of biomass for biodiesel  that has the capacity to absolutely  displace fossil fuel. Biodiesel has gain sufficient interest in latest years  because of its green  nature, non-poisonous characteristics, biodegradability and decrease net  carbon cycle as  compared to standard diesel fuel. In this research, Spirogyra sp. was collected from Tubu  river, a tributary of River Kaduna, as a source of biomass feedstock for biodiesel production.  Spirogyra  sp. turned into cultured in various nitrogen (2.94 x 103 (100%), 2.20 x 103 (75%),  1.47 x 103 (50%), 0.73 x  104 (25%), and 0.000 (0%)) concentrations in Bold’s Basal Media (BBM) in a laboratory test for 21 days at  25-28°C ambient temperature. Oil from Spirogyra  sp. become extracted in soxhlet extractor using  n-hexane as solvent and transformed into  biodiesel through transesterification reaction. The highest biomass growth, oil, lipid content and biodiesel production were observed in treatment with 75% (2.20 x 103) Spirogyra sp. has a big capability for biodiesel production.
      PubDate: 2022-05-05
      DOI: 10.4314/njb.v38i2.14
      Issue No: Vol. 38, No. 2 (2022)
       
 
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