Hydrochemical assessment of groundwater quality in Sagamu area, Southwestern Nigeria

Groundwater samples from 39 wells in different geological settings in Sagamu area, Southwestern Nigeria were analysed for their hydrochemical properties, to determine their suitability for domestic and irrigation purposes. The samples were subjected to chemical analysis involving the Induced Coupled Plasma Mass Spectrometry (ICPMS) for cation determination, and volumetric analysis to determine the anions. The classification of the groundwater using Piper diagram, Gibbs variation, Wilcox classification and Zhang evolution plot reveals the distribution of groundwater quality in the area. Parameters like Sodium Absorption Ratio (SAR), Magnesium Adsorption Ratio (MAR) Kelly’s Ratio (KR), Permeability Index (PI), Residual Sodium Bicarbonate (RSBC), and chloro-alkaline indices (CAI), were calculated for irrigation purposes. The results were presented as spatial distribution maps for interpretation and further inferences. Comparison of the groundwater quality in the area with local and international standards indicates that 94.9% of the groundwater within the area is generally suitable for domestic and irrigation purposes.Keywords: Groundwater, hydrochemical assessment, geological settings, Sagamu area, Irrigatio

Partial purification and some properties of &#945–glucosidase from Trichoderma longibrachiatum

The use of hydrolase enzyme plays an important role in the industrial production of á-D-glucose from carbohydrate sources. This study investigated partial purification and characterization of á-glucosidase from Trichoderma longibrachiatum with a view to enhancing its potentials in biotechnological processes. Strains of Trichoderma longibrachiatum were cultured on rice bran medium at 30°C for 96 hour for the production of á–glucosidase. The enzyme was partially purified by eluting the ammonium sulphate (70%) saturation precipitated sample on Sephadex G-75 and Sephadex G-25. Enzyme assay was carried out using p-nitrophenyl-á-D-glucopyranoside (PNP- á-G) as the substrate and protein concentration was determined. Kinetic parameters, molecular weight, pH effect, temperature and thermostability were also determined. The activity of enzyme in the presence of arylglucosides and different cations were monitored. The partially purified protein migrated as a single band in 10% SDS-Polyacrylamide gel-electrophoresis. The enzyme presented a relative molecular weight of about 58KDa as estimated by PAGE. The extracellular á–glucosidase showed typical á–glucosidase activity, hydrolyzing p-nitrophenyl-á-D-glucopyranoside and exhibited optimum catalytic activity (4.89ìmol/ml/min) at 40°C and pH 4.5. The enzyme was stable at 40°C for 150 minutes. Carboxymethylcellulose was also hydrolyzed by this enzyme. The Km and Vmax with p-nitrophenyl- á -D-glucopyranoside were 33.33mM and 20.00 ìmol/min/mg protein respectively. This study therefore revealed the presence of á–glucosidase in Trichoderma longibrachiatum which could serve as alternative species for the production of á–glucosidase enzyme. KEYWORDS: Enzyme purification, characterization, á-glucosidase, Trichoderma longibrachiatu

Management of inputs resources in small-scale catfish farming in Oyo State, Nigeria

This study examined management of pre-stocking, stocking and harvest activities of small-scale catfish farmers in Oyo State, Nigeria. Structured questionnaires were used to collect the needed information and descriptive statistics was use to analyze the collected data. The results show that earthen and concrete pond are the two major ponds utilized by catfish farmers. The cost of pond construction varied with size, location, soil type and the cost of materials; so most farmers rented their ponds. The dimension of earthen pond varies between 53.51m2 and 891.87m2 with a mean of 197.34±2.48m2. The dimension of concrete pond varied between 13.94m2 and 83.61m2, with a mean of 45.89 ± 8.04m2. Many (41.5%) catfish farmers financed their business with their personal savings. Most fish farms are located close to streams for steady supply of water. Most (68.5%) farmers stocked juvenile while 31.5% stocked fingerlings. Farmers fed their fish with respect to their weight, satiation or availability of feed; but majority fed twice per day. Most farmers harvest catfish twice per year. Farmers should therefore know that proper and efficient management of input variables are prerequisite for profitability in catfish production. Keywords: Earthen pond; juvenile; fingerlings; feed; Water; Profitabilit

Search for heavy resonances decaying into a W or Z boson and a Higgs boson in final states with leptons and b-jets in 36 fb(-1) of root s=13 TeV pp collisions with the ATLAS detector

A search is conducted for new resonances decaying into a W or Z boson and a 125 GeV Higgs boson in the νν¯¯¯bb¯¯, ℓ±νbb¯¯, and ℓ+ℓ−bb¯¯ final states, where ℓ± = e± or μ±, in pp collisions at s√=13 TeV. The data used correspond to a total integrated luminosity of 36.1 fb−1 collected with the ATLAS detector at the Large Hadron Collider during the 2015 and 2016 data-taking periods. The search is conducted by examining the reconstructed invariant or transverse mass distributions of W h and Zh candidates for evidence of a localised excess in the mass range of 220 GeV up to 5 TeV. No significant excess is observed and the results are interpreted in terms of constraints on the production cross-section times branching fraction of heavy W ′ and Z′ resonances in heavy-vector-triplet models and the CP-odd scalar boson A in two-Higgs-doublet models. Upper limits are placed at the 95% confidence level and range between 9.0 × 10−4 pb and 7.3 × 10−1 pb depending on the model and mass of the resonance

Measurements of photo-nuclear jet production in Pb plus Pb collisions with ATLAS

Ultra-peripheral heavy ion collisions provide a unique opportunity to study the parton distributions in the colliding nuclei via the measurement of photo-nuclear jet production. An analysis of jet production in ultra-peripheral Pb+Pb collisions at √sNN = 5.02 TeV performed using data collected with the ATLAS detector in 2015 is described. The data set corresponds to a total Pb+Pb integrated luminosity of 0.38 nb−1. The ultra-peripheral collisions are selected using a combination of forward neutron and rapidity gap requirements. The cross-sections, not unfolded for detector response, are compared to results from Pythia Monte Carlo simulations re-weighted to match a photon spectrum obtained from the STARlight model. Qualitative agreement between data and these simulations is observed over a broad kinematic range suggesting that using these collisions to measure nuclear parton distributions is experimentally realisable

Measurements of photo-nuclear jet production in Pb + Pb collisions with ATLAS

Ultra-peripheral heavy ion collisions provide a unique opportunity to study the parton distributions in the colliding nuclei via the measurement of photo-nuclear jet production. An analysis of jet production in ultra-peripheral Pb+Pb collisions at √sNN = 5.02 TeV performed using data collected with the ATLAS detector in 2015 is described. The data set corresponds to a total Pb+Pb integrated luminosity of 0.38 nb⁻¹. The ultra-peripheral collisions are selected using a combination of forward neutron and rapidity gap requirements. The cross-sections, not unfolded for detector response, are compared to results from Pythia Monte Carlo simulations re-weighted to match a photon spectrum obtained from the STARlight model. Qualitative agreement between data and these simulations is observed over a broad kinematic range suggesting that using these collisions to measure nuclear parton distributions is experimentally realisable

Component Elements Flow Prescription in Kalman Energy Gains Communication Systems Operation

This paper is aimed to develop a method of facing challenges when the state of mobile communication sets is liable to poor message reception. When the sets system and handling of their operation were orderly maintained, it was observed that successful message send-receive transitions depended on the conduciveness of the wave propagated communication media. On recalling Kalman energy gains analysis, an input-output communication model was proposed. Measurements taken of heat-wave restricted model enabled a gain of insight into the state of arts of the operating communication media and likely causes of send-receive failures.Keywords: Communication elements profile, Optimum time varying track, Control quality orders, Interference and sendreceive error

Component Elements Flow Prescription in Kalman Energy Gains Communication Systems Operation

This paper is aimed to develop a method of facing challenges when the state of mobile communication sets is liable to poor message reception. When the sets system and handling of their operation were orderly maintained, it was observed that successful message send-receive transitions depended on the conduciveness of the wave propagated communication media. On recalling Kalman energy gains analysis, an input-output communication model was proposed. Measurements taken of heat-wave restricted model enabled a gain of insight into the state of arts of the operating communication media and likely causes of send-receive failures.Keywords: Communication elements profile, Optimum time varying track, Control quality orders, Interference and sendreceive errorsJournal of the Nigerian Association of Mathematical Physics, Volume 20 (March, 2012), pp 257 – 26

Late transition metal complexes with functionalized mercaptoethyl-phosponates ligands and their efficacy against fungal pathogens of cow-pea

No Abstract.International Journal of Natural and Applied Sciences Vol. 4 (1) 2008: pp. 110-11