1,720,969 research outputs found
Kinetics of Microbial Production of 2, 3-Butanediol from Cheese Whey Using Klebsiella pneumonia
No full textBiodegradation of pyrene using corynebacteria SP and pseudomonas putida in contaminated Water
No full textAn article on Biodegradation of pyrene graphs and mathematical formula.The hazardous nature of pyrene have been posed serious threat to humans on exposure through industrial effluent discharged and other combustion activities of petroleum products. The biodegradation of pyrene as a bioremediation method by the activity of Corynebacteria sp and Pseudomonas putida with effectiveness of these microbes was aim to be investigated. The enriched pure culture of Corynebacteria sp and Pseudomonas putida was inoculated into pyrene contaminated water at room temperature of 28ºC with mineral salt medium under an optimum pH of 7.2 for 96 hours, thereby decreased the pyrene concentration in the contaminated water and biodegradation kinetics parameters were evaluated from the experimental results. The result favourable to bothCorynebacteria sp and Pseudomonas putida as pyrene degraders in the contaminated water but Pseudomonas putida was preferred due to higher content of pyrene degraded
Effect of chemical agents on morphology, tensile properties and water diffusion behaviour of hibiscus sabdariffa fibers
No full textThe article contains tables and figuresEffective utilization of Hibiscus sabdariffa fibers in composites applications as a reinforcing fibers in polymer matrix have been a major concern due to its poor mechanical and hydrophilic properties. It will be of benefits to environmental and technological advancement, if its properties are properly handled. In this study, the morphological, tensile and water absorption characteristics of H. sabdariffa fibers was aimed to be investigated. H. sabdariffa fibers was modified using sodium hydroxides, sodium lauryl sulphate and ethylene diamine tetraacetic acid. The morphology using scanning electron microscopy, tensile properties (strength, modulus, elongation and energy at break), water absorption and water diffusion behaviours were studied. Chemical modifications improved fiber surface and roughness, tensile strength and modulus, elongation and energy at break with reduced water absorption of H. sabdariffa fibers. The water diffusion behaviour is less - Fickian controlled by water penetration rate. Hence improved the hydrophobic nature of H. sabdariffa fibers
Effect of chemical agents on morphology, tensile properties and water diffusion behaviour of hibiscus sabdariffa fibers
Get PDFA short a Article on Effect of chemical agents of hibiscus sabdariffa fibers. It contains tables, pictures and graphs.Effective utilization of Hibiscus sabdariffa fibers in composites applications as a reinforcing fibers in polymer matrix have been a major concern due to its poor mechanical and hydrophilic properties. It will be of benefits to environmental and technological advancement, if its properties are properly handled. In this study, the morphological, tensile and water absorption characteristics of H. sabdariffa fibers was aimed to be investigated. H. sabdariffa fibers was modified using sodium hydroxides, sodium lauryl sulphate and ethylene diamine tetraacetic acid. The morphology using scanning electron microscopy, tensile properties (strength, modulus, elongation and energy at break), water absorption and water diffusion behaviours were studied. Chemical modifications improved fiber surface and roughness, tensile strength and modulus, elongation and energy at break with reduced water absorption of H. sabdariffa fibers. The water diffusion behaviour is less - Fickian controlled by water penetration rate. Hence improved the hydrophobic nature of H. sabdariffa fiber
Improving the unsaturated polyester matrix through commingled with chemically treat cissus populnea fibers
Get PDFThis article has tables and figuresThe extent of improvement of chemically treated Cissus populnea fiber on morphology, mechanical, adhesion, and water sorption behaviors in Cissus populnea fiber/UPE composites was aimed to be investigated. Fibers were treated with sodium hydroxide (NaOH) and sodium lauryl sulphate (SLS), respectively. The composites were prepared by hand laying techniques of treated and untreated fibers with unsaturated polyester matrix (UPE) using response surface methodology with central composites design of DoE software. The mechanical properties (tensile strength, tensile modulus, flexural strength, flexural modulus, hardness and impact strength) were optimized. The interfacial shear stress (IFSS) using fiber pull-out method, scanning electron microscopy (SEM), density, and water sorption behavior using power law with Fickian diffusion law were studied at optimum level. The optimization of mechanical properties as dependent with factors (weight fraction of the fiber and weight fraction of the matrix) using RSM with CCD technique was done to avoid waste of materials and confusion on properties of the composites. Treatment of Cissus populnea fiber with NaOH and SLS, respectively, improved the tensile and flexural properties of the composites. NaOH treatment gave the best tensile strength while best flexural properties was achieved with SLS treatment. SEM images revealed the morphological changes caused by NaOH and SLS, respectively, at optimal composites production to corroborate interfacial adhesive between Cissus populnea fiber and UPE matrix on composite properties. NaOH and SLS treatments, respectively, reduced the water saturation point with less Fickian behaviour and increased water diffusion coefficient of the composite
Effect of chemically modified cissus populnea fibers on mechanical, microstructural and physical properties of cissus populnea/high density polyethylene composites
Get PDFA short Article on Effect of chemically modified cissus populnea fibers. It contain tables, pictures and graphsThe effect of chemically modified Cissus populnea (C. populnea) fiber using sodium hydroxide (NaOH) and sodium lauryl sulphate (SLS) on mechanical, morphological and physical (density and water absorption behaviour) properties of C. populnea fiber/recycled HDPE composites was aimed to be investigated. The composites of unmodified and modified C. populnea fiber/HDPE were prepared using injection molding machine. The mechanical properties (tensile strength and modulus, flexural strength and modulus, hardness and impact strength), interfacial shear stress, density, water absorption behaviour and microstructural properties using scanning electron microscope (SEM) and fourier transform infrared (FTIR) spectroscope were characterized. The results shows that C. populnea fiber increased the mechanical properties of HDPE matrix with reduced impact strength of the composites. The NaOH and SLS treatments, respectively, improved the mechanical properties of C. populnea fiber/HDPE composites, although NaOH treated C. populnea fiber reduced the tensile modulus. The change in morphology and functional group, respectively, due to the modification was observed in SEM and FTIR. The density and water absorption of the composites, respectively, reduced when SLS modified C. populnea fiber was used
compared to untreated C. populnea fiber/HDPE composites. The SLS treated C. populnea fiber prove to be superior for reinforcement, stiffness and light weight material
Kinetics of degradation of anthracene by the activity of corynebacteria sp and pseudomonas putida in contaminated water
Get PDFThe article contains figuresThe environmental threat of anthracene to humans on exposure through industrial effluent discharged and other combustion activities into the environment with expensive nature of the physical and chemical remediation techniques initiates this research. The kinetics of degradation of anthracene by the activity of Corynebacterium sp and Pseudomonas putida for the liberation of the anthracene contaminated water was aim to be investigated. The enriched inoculums of Corynebacterium sp and Pseudomonas putida was separately inoculated into
anthracene contaminated water at room temperature of 280C under an optimum pH of 7.2 for 96hours, thereby decreased the anthracene content in the water. About 95.2% of anthracene was degraded by Corynebacterium sp while about 93.5w/w% of anthracene was degraded by Pseudomonas putida. The biodegradation kinetics parameter evaluated indicates that both Corynebacterium sp and Pseudomonas putida were favourable for bioremediation of anthracene contaminated water but Corynebacterium sp was preferred due to higher
proportion of anthracene utilized
Girl-Child and Women: Education and Empowerment for Sustainable Development
Get PDFImproper education of the girl-child and women characterized with low self-esteem, lack of confidence, insecurity and national development. The reasons for girl-child and women education as well as empowerment for sustainable health and development was aimed to be investigated. Critical issues in girl-child education such as access to education, drop out from school by a female child and quality of education experience which endangered the girl-child or women have been discussed in this report. Educating and empowering of female children and women coupled with proffered solutions such as building of good mentoring as well as networking groups, sponsorships and proper training would not only apparently contribute towards embracing gender equality, increasing the workforces, particularly, STEM (Science, Technology, Engineering and Mathematics) workforce but improved emotional, economic, mental, physical, political, religion and social experiences. Thus, yield a healthy nation, high quality leadership, reduced rate of dependence and increased nation’s workforce for sustainable development. Keywords: Education, Girl-child, Women Empowerment, Sustainable development
Girl-Child and Women: education and empowerment for sustainable development
Get PDFAn article on Girl-Child and Women published in an International Peer-reviewed JournalImproper education of the girl-child and women characterized with low self-esteem, lack of confidence, insecurity and national development. The reasons for girl-child and women education as well as empowerment for sustainable health and development was aimed to be investigated. Critical issues in girl-child education such as access to education, drop out from school by a female child and quality of education experience which endangered the girl-child or women have been discussed in this report. Educating and empowering of female children and women coupled with proffered solutions such as building of good mentoring as well as networking groups, sponsorships and proper training would not only apparently contribute towards embracing gender equality, increasing the workforces, particularly, STEM (Science, Technology, Engineering and Mathematics) workforce but improved emotional, economic, mental, physical, political, religion and social experiences. Thus, yield a healthy nation, high quality leadership, reduced rate of dependence and increased nation’s workforce for sustainable development
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