Abstract A survey of some fungi associated with onion bulbs rot was carried out in Maiduguri, Borno State Nigeria. The aim of the study was to isolate and identify the fungal pathogens that cause the onion bulb rot. Onion samples were collected in three markets within Maiduguri, namely, Gamboru, Monday market and Baga markets. Four […]
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Kinetics and Mechanisms of the Oxidation of Thiosulphate by Potassium Trisoxalatoferrate (iii) in Aqueous Hydrochloric Acid Medium
Abstract The kinetics of oxidation of S2O32- by K3[Fe(C2O4)3].3H2O has been investigated in aqueous acid medium at λmax = 420nm, T = 27.0 ± 1.0 °C, I = 0.4 moldm-3 (NaCl) and [H+] = 0.02 moldm-3 (HCl). The reaction is first order with respect to oxidant and reductant concentrations and obeyed the general rate law: […]
Synthesis, structural properties and characterisation of self activating Na2Zr(BO3)2
Abstract In this study, the synthesis, characterization and luminescence properties of the self-activated a novels odiumzirkoniumorthoborate (Na2Zr(BO3)2) was reported. This compound has been successfully synthesized by solid state reaction at 1000 °C among the initial reactants of Na2CO3, ZrO2 and H3BO3 (molar ratio 1: 1: 2). The crystal structure analysis with X-ray powder diffraction showed […]
CFD Modeling of Biofouling in Membrane Bioreactor (MBR) with COMSOL Multiphysics software
Abstract Today, membrane bioreactors have been used extensively in the water and wastewater treatment industry due to their proper function. Thus, the study on them seems to be necessary. In this research, a brief description of the membrane bioreactor and its application is first given, and then the various types of fouling in the membrane […]
Synthesis of P-isopropylacetonate-N-methyl-1,3,5-triaza-7-phosphaadamantane
Abstract A novel phosphine, p-isopropylacetonate N-methyl-1,3,5-triaza-7-phosphaadamantane, has been synthesized as a triflate salt from the reaction of 1,3,5-triaza-7-phosphaadamantane with methyl triflate in dry acetone in the presence of minimal amount of D2O and triflic acid. The compound was characterized by NMR spectroscopy, IR spectroscopy, and mass spectrometry. It was crystallized as the triflate salt, [C13H26N3OP]2+ […]
Water Quality Assessment of Lake Edku using physicochemical and Nutrients Salts, Egypt
Abstract The present work is aimed to assess the water quality status of Lake Edku using the data at various locations on the lake based on the Water Quality Index (WQI). Water Quality Index was applied in ten water quality parameters (pH, Dissolved Oxygen, biological oxygen demand, suspended particulate matter, Electrical conductivity, Nitrate, Nitrite ammonium and […]
Preparation, Microstructure and Cytotoxicity Research on Hydroxyapatite/Chitosan-Chondroitin Sulfate
Abstract In this paper, the nano-hydroxyapatite/chitosan-chondroitin sulfate (Hap/Cs-Chs) composite materials with different mass ratios were prepared by liquid co-precipitation method. On the basis of the microstructure, phase and compressive strength of the composite materials were investigated respectively. The safety of composite materials was evaluated by MMT method. The results showed that Hap/Cs-Chs composite materials exhibited […]
Water treatment chlorination: An updated mechanistic insight review
Abstract Since the 1970s’ disinfection by-products (DBPs) detection, the water treatment specialists’ main focuses were accorded to the DBPs formation, characterization, regulations and control. Involved stages in disinfection process were at a certain level kept at the side as a black box. This paper is a broad review on chlorination applied in water treatment technology […]
Browning, Viscosity and Moisture Sorption Characteristics of Fresh and Stored African Breadfruit Kernel Flour
Abstract Flour was prepared from African breadfruit seeds and was stored in tin can and polyethylene bag at ambient temperature (30 °C) for 5 months. The browning index, viscosity and moisture sorption characteristics of the fresh and stored flour samples were evaluated. The equilibrium moisture content (EMC) slightly increased at low water activities but increased […]
Utilizing CPM/PERT Cost Function and Earned Value System in Monitoring and Controlling Building Projects (A Case Study of Recently Completed 5-Bedroom Detached Duplex at G.R.A, Maiduguri)
Abstract This paper x-rays the use of Critical Path Method-Project Evaluation Review Technique (CPM/PERT) cost function and Earned value system in monitoring and controlling civil and building engineering projects. The system culminates in the progressive generation of the CPI-SPI graphical contour which guides the project team in tracking projects. It is a simple step-by-step approach […]