Ladoke Akintola University of Technology

About: Ladoke Akintola University of Technology is a education organization based out in Ogbomoso, Nigeria. It is known for research contribution in the topics: Population & Adsorption. The organization has 2786 authors who have published 3066 publications receiving 36850 citations. The organization is also known as: Oyo State University of Technology & LAUTECH.

Kinetic modeling of liquid-phase adsorption of Congo red dye using guava leaf-based activated carbon

Abstract: Guava leaf, a waste material, was treated and activated to prepare adsorbent. The adsorbent was characterized using Scanning Electron Microscopy (SEM), Fourier Transform Infra Red (FTIR) and Energy-Dispersive X-ray (EDX) techniques. The carbonaceous adsorbent prepared from guava leaf had appreciable carbon content (86.84 %). The adsorption of Congo red dye onto guava leaf-based activated carbon (GLAC) was studied in this research. Experimental data were analyzed by four different model equations: Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherms and it was found to fit Freundlich equation most. Adsorption rate constants were determined using pseudo-first-order, pseudo-second-order, Elovich and intraparticle diffusion model equations. The results clearly showed that the adsorption of CR dye onto GLAC followed pseudo-second-order kinetic model. Intraparticle diffusion was involved in the adsorption process. The mean energy of adsorption calculated from D-R isotherm confirmed the involvement of physical adsorption. Thermodynamic parameters were obtained and it was found that the adsorption of CR dye onto GLAC was an exothermic and spontaneous process at the temperatures under investigation. The maximum adsorption of CR dye by GLAC was found to be 47.62 mg/g. The study shows that GLAC is an effective adsorbent for the adsorption of CR dye from aqueous solution.

Housing delivery system, need and demand

Abstract: This paper reviews the past and current housing delivery programmes in Nigeria and analysed the demand and supply issues. The paper examined factors responsible for high housing pricing trends, it state the constraints and challenges in accessing housing. The paper ascertains guiding principles for implementation towards quality housing delivery, and it identifies the various housing delivery mechanisms in current practice and suggests a holistic programme to address the huge housing shortage in Nigeria. The study addresses the problem of housing delivery systems, the supply and the demand issues with a view to inform policy on housing provision structure, want and request towards improving the level of delivery in Nigeria. The methodology adopted for the study includes interviews and analyses of data collected during the field investigations. These investigations were complemented with review of literature. The data required for this study were obtained primarily from secondary source and personal observations. Suggestions were put forward on policy measures that can sustain future planning of housing provision in Nigeria to conform to what is obtain in other part of the world.

Comparison of the supplemental effects of Saccharomyces cerevisiae and antibiotics in low‐protein and high‐fibre diets fed to broiler chickens

Abstract: Two experiments were completed to compare the supplemental effects of yeast Saccharomyces cerevisiae and sub‐therapeutic antibiotics in high‐fibre and low‐protein diets for broiler chicks. In experiment I, yeast was added at 1.5, 3.0 and 6.0gkg‐1 while penicillin, tylosin or neoterramycin were added at 150 mg kg‐1 into different batches of a high‐fibre diet containing 250 g kg‐1 palm kernel meal. Saccharomyces cerevisiae and antibiotics increased BW, BWG, FCR, feed intake, carcass and breast weights above the control. Small intestine weight was reduced by antibiotics, while yeast caused a lower deposition of abdominal fat. Liver weights of different treated broilers were similar. The performance indices were superior on penicillin and 3.0 g kg‐1 yeast compared to other supplements evaluated. In the second experiment, 1.5 and 3.0 g kg‐1 of yeast, and 0.75 mg kg‐1 of procaine penicillin, zinc bacitracin and tylosin were separately added to a 180 g kg‐1 crude protein diet. Performance of the chicks with addi...

Coconut (Cocos nucifera) Shell Based Activated Carbon for the Removal of Malachite Green Dye from Aqueous Solutions

Abstract: The adsorption of malachite green (MG) dye using coconut shell based activated carbon (CSAC) was investigated. Operational factors such as the effect of pH, initial dye concentration, adsorbent dosage, contact time, and solution temperature on the adsorption process were studied. Solution pH strongly affected the chemistry of both the dye molecule and CSAC in solution. Optimum dye removal was obtained at pH ≥ 8.0. Equilibrium was reached in 120 minutes contact time. The Langmuir, Freundlich, and Dubinin–Radushkevich (D-R) isotherm models were used to evaluate the adsorption data. The adsorption data fitted the Langmuir model most with maximum adsorption monolayer coverage of 214.63 mg/g. Pseudo-first-order, pseudo second-order, and intraparticle diffusion models were also used to fit the experimental data. Kinetic parameters, rate constants, equilibrium sorption capacities, and related correlation coefficients, for each model were calculated and discussed. Thermodynamic parameters such as ΔG0, ΔH0, and ΔS...

Purification and characterization of antioxidative peptides derived from rice bran protein hydrolysates

Abstract: Rice bran protein fraction (RBPF)—albumin, globulin, glutelin and prolamin were hydrolyzed with proteases M, N, P, S and pepsin under their optimal conditions for 24 h. Hydrolysates of various hydrolysis periods were collected and subjected to peptide mapping and the antioxidative activity measured by the 2,2-Azino-bis-3-ethylbenzothiazoline-6-sulfonic Acid (ABTS) method. Protease M hydrolysates showed high degree of hydrolysis (DH), but low antioxidative activity. On the contrary, pepsin hydrolysates showed low DH with high activity. Albumin and globulin hydrolysates had higher DH values, but lower values for glutelin and prolamin. The globulin hydrolysate (Opep2) from 2 h-pepsin hydrolysis was separated by using three consecutive purification steps with RP-HPLC. Nineteen antioxidative peptides were isolated and their amino acid sequences were determined by a gas-phase protein sequencer and MALDI-TOF mass spectrometry. These peptides were composed of 6–30 amino acid residues with molecular masses ranging from 670–3,611 Da. Tyr-Leu-Ala-Gly-Met-Asn had the highest antioxidative activity among them.