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.

Novel biosynthesized silver nanoparticles from cobweb as adsorbent for Rhodamine B: equilibrium isotherm, kinetic and thermodynamic studies

Abstract: This study has investigated the adsorption of Rhodamine B (Rh-B) dye on novel biosynthesized silver nanoparticles (AgNPs) from cobweb. The effects of contact time, initial pH, initial dye concentration, adsorbent dosage and temperature were studied on the removal of Rh-B and they significantly affected its uptake. Adsorption isotherms were evaluated using Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherm models. The adsorption process was best described by Langmuir isotherm with R2 of 0.9901, indicating monolayer adsorption. The maximum adsorption capacity (qmax) of 59.85 mg/g showed that it has relatively high performance, while adsorption intensity showed a favourable adsorption process. Pseudo-second-order kinetics fitted best the rate of adsorption and intra-particle diffusion revealed both surface adsorption and intra-particle diffusion-controlled adsorption process. Negative values of thermodynamic parameters (∆H°, ∆S° and ∆G°) indicated an exothermic and spontaneous adsorption process. The mean sorption energy (E) and activation energy (Ea) suggested the uptake of Rh-B onto AgNPs was chemical in nature (chemosorption).

Effect of incorporation of conductive fillers on mechanical properties and thermal conductivity of epoxy resin composite

Abstract: Applications of polymer-based nanocomposites continue to rise because of their special properties such as lightweight, low cost, and durability. Among the most important applications is the thermal management of high density electronics which requires effective dissipation of internally generated heat. This paper presents our experimental results on the influence of graphene, multi-walled carbon nanotubes (MWCNTs) and chopped carbon fibers on wear resistance, hardness, impact strength and thermal conductivity of epoxy resin composites. We observed that, within the range of the experimental data (epoxy resin + 1, 3, 5 wt% of graphene or 1, 3, 5 wt% MWCNT or 10, 30, 50 wt% carbon fibers), graphene-enhanced wear resistance of the nanocomposites by 75% compared to 50% and 38% obtained for MWCNT and carbon fiber composite, respectively. The impact resistance of graphene nanocomposite rose by 26% (from 7.3 to 9.2 J/m2) while that of MWCNT nanocomposite was improved by 14% (from 7.3 to 8.2 J/m2). The thermal conductivity increased 3.6-fold for the graphene nanocomposite compared to threefold for MWCNT nanocomposite and a meager 0.63-fold for carbon fiber composite. These enhancements in mechanical and thermal properties are generally linear within the experimental limits. The huge increase in thermal conductivity, especially for the graphene and MWCNT nanocomposites makes the composites readily applicable as high conductive materials for use as heat spreaders and thermal pads.

Influences of socio-cultural experiences on residents’ satisfaction in Ikorodu low-cost housing estate, Lagos state

Abstract: This study examined the influences of socio-cultural experiences on residents’ housing satisfaction in Ikorodu low-cost housing estate in Lagos State. This study was carried out with the aid of questionnaire administration and reconnaissance survey. The result of the survey shows that the total numbers of the housing units in the area were 119 buildings which comprised 106 bungalows and 13 story buildings. The estate was stratified into two (2) zones which were story buildings and bungalow buildings. Using a systematic sampling technique, one of every two (2) houses was selected for interview in both zones. A total of 106 residents were selected from the bungalow units and 20 residents from the story buildings making a sum of 126 residents that were selected for the interview, but a total of 122 questionnaires were recovered. Findings from the study reveals that the residents’ were fairly satisfied with the environmental elements of their dwellings, the physical elements, the behavioural elements and the economic elements and were dissatisfied with the functional elements and timing element which constitute the quality performance and maintenance criteria of their buildings. More so, findings from the study reveal that there is significant difference in residents’ level of satisfaction in the housing elements among several socio-cultural characteristics of residents, such as gender, ethnicity of end users, family size, family structure, religious beliefs, ethnic group of residents, social relation, years of living in area and age of residents among others. The study further revealed that there is no significant difference in residents’ level of satisfaction in the housing elements among residents’ household position and marital status. Recommendations were proffered to guide policy-makers, some of which includes local participation approach in housing delivery, the use of local building materials, intensive site and service scheme among others.

Ficolin-2 Levels and FCN2 Genetic Polymorphisms as a Susceptibility Factor in Schistosomiasis

Abstract: Background. Human ficolin-2 (L-ficolins) encoded by the FCN2 gene are pattern-recognition proteins involved in innate immunity and are associated with several infectious diseases. Methods. A Nigerian cohort of 168 Schistosoma haematobium–infected individuals and 192 healthy controls were examined for functional single-nucleotide polymorphisms in the promoter region (−986G>A, −602G>A, −4A>G) and in exon 8 (+6424G>T) using real-time polymerase chain reaction. Results. The FCN2 −986A and −4G alleles were significantly associated with the occurrence of schistosomiasis (P = .0004 for −986G>A; P= .0001 for −4A>G). The heterozygous genotypes (P= .0006 for −986G>A; P = .0002 for −4A>G) were observed to be a risk factor for susceptibility to schistosomiasis, whereas the homozygous genotypes of major alleles (P = .0002 for −986G>A; P= .0001 for −4A>G) were observed to shield against schistosomiasis. The haplotype AGGG (P = .0002) was observed to be a risk factor for susceptibility to schistosomiasis compared with controls, and the haplotype GGAG (P= .04) was observed to confer protection compared with patients. Ficolin-2 serum level was significantly higher in controls (P A and −4A>G) influence ficolin-2 serum levels and susceptibility to schistosomiasis. Schistosomiasis is a major human parasitic disease that is caused by different species of trematode of the genus Schistosoma in sub-Saharan Africa. The most prevalent species in sub-Saharan Africa is S. haema

Heavy Metal Contamination and Ecological Risk Assessment in Soils and Sediments of an Industrial Area in Southwestern Nigeria

Abstract: Background. Increased growth of industrial activities, especially in urban centers, is one of the main sources of toxic substances in Nigeria. The level of these impacts is not well known. Soil and...