Abstract Surface water contamination has become one of the main environmental issues of concern and a challenge to the world population, especially in the developing world, that face potable or usable water security. In this study concentrations of available nutrients (PO4 3- and NO3 - ) in sediments and water along River Isiukhu, within Lake Victoria catchment area in Kenya are presented. Sediments and water samples were collected from 11 sampling sites along River Isiukhu. Available phosph...
Abstract Fish products may be important vectors of human exposure to heavy metals. However the understanding of how heavy metals bioconcentrate in different fish species (sp.) through contaminated environments such as wastewater treatment lagoons is very limited. In this study bioconcentration and Interspecies Uptake of Heavy Metals by three fish species (Oreochromis niloticus, Clarius gariespinus and Protopterus aethiopicus) receiving naturally contaminated wastewater was investigated. Tiss...
Abstract Aim: To determine the phytochemicals in Ocimum gratissimum leaves, their phenolic content, antioxidant potential and antiproliferative activity against human prostate (DU145), colon (CT26) and cervical (HeLa 229) cancer cells. Place and Duration of the Study: Leaves of O. gratissimum were collected from cultivated plants in Wakiso district of Uganda. The samples were analyzed at Directorate of Government Analytical Original Research Article Nassazi et al.; AJACR, 6(4): 1-18, 2020; A...
Abstract Eritrea has a number of hot springs whose physicochemical characteristics are not documented. This study examined the thermal and chemical features of five hot springs located in the eastern escarpment of Eritrea. Field data and water samples were collected from five hot springs namely; Akwar and Maiwooi near Gahtelai, Garbanabra and Gelti near Irafayle at the Gulf of Zula and Elegedi in Alid volcanic center. The water temperatures at source varied from 49.5°C to 100°C while pH le...
Abstract: Cytogenotoxic effects of a commercial formulation of ethephon (ETF) and a commercially formulated mixture of ethephon+cyclanilide (ETF+CYC), which are used as plant growth regulators (PGRs) in modern agriculture, were investigated by using the anaphase-telophase chromosome aberration (CA) assay in root meristem cells of Allium cepa L. A. cepa roots were treated with 25 (EC50/2), 50 (EC50), and 100 ppm (EC50×2) of ETF, and with the same concentrations of ETF+CYC, for 24, 48, and 72...
ABSTRACT: Styrene acrylate resin is a versatile material with a wide range of applications. It is used in a variety of products, including paints, coatings, adhesives, and sealants. The determination of styrene acrylate resin in these products is important for quality control and regulatory compliance. Fourier transform infrared spectroscopy (FTIR) is a powerful technique that can be used to determine the concentration of styrene acrylate resin in a variety of matrices. In this study, a...
This paper reviews the literature on the industrial approach to chemical education in Kenyan universities. The industrial approach is a pedagogy that seeks to integrate the teaching of chemistry with the needs of industry. This is done by providing students with opportunities to learn about chemistry in a real-world context, such as by working on projects with industrial partners or by conducting internships in the chemical industry. The paper begins by discussing the rationale for the indust...
ABSTRACT In this article, a time truncated life test based on two-stage group acceptance sampling plan is proposed for lifetime of an item follows odd generalized exponential log-logistic distribution (OGELLD). The ability about the lot acceptance can be made in the first or second stage according to the number of failures from each group. The optimal parameters for the proposed plan are determined such that both producer’s as well as consumer’s risks are contented simultaneously for the...
Bioconversion of agricultural waste products to produce value-added food products like simple sugar; fuels and chemicals offers potential economic, environmental and strategic advantages over traditional fossil-based products. A comparative study on the effect of temperature and concentration on waste cellulose biomass degradation to glucose was studied at temperature range of 80 – 1300C and concentration range of 2, 4, 4.5, 5.0, 5.5 and 6Mol/dm3 for a period of 48hours. The percent...
Abstract: This research has helped us to ascend from the initial two exploratory studies to a more advanced general conclusion and theory that tea leaves (Camellia sinensis) has a great potential for Pb(ii) and Zn uptake, as such, a more suitable Low-cost adsorbent for the effective removal of Pb (II) and Zn from industrial effluents waste water than tea fibre. This is coined from the results of the different biosorption studies carried out as a function of contact time, initial metal...
Abstract: In this research work, Low-cost adsorbent was prepared from Camellia sinensis, physicochemical characteristics and the effective removal of Lead and Zinc from an aqueous phase were evaluated.The Camellia sinensis adsorbent precursor was characterized in terms of adsorbent dose, initial concentration and contact time. Aqueous phase adsorption studies were carried out under kinetic studies of pseudo first order, pseudo second order kinetics and the residue concentration of Lea...
This article reports quantum chemical calculations on sulphur trioxide (SO3) and its protonated analogues (HSO3 + and HOSO2 + ) by employing six different computational methods. This covers the simple Hatree Fock (HF) method, coupled cluster method, the Gaussian-4 (G4) compound method amongst others with two different basis sets (6-311++G** and cc-pVDZ). Optimized geometries, bond distance, rotational spectroscopy, dipole moment, proton affinity, vibrational spectroscopy and vibration...
Tapinanthus dodoneifolius belongs to the family Loranthaceae and is widely distributed in West Africa, Europe and Asia, commonly known as mistletoe. It exhibits a wide array of pharmacological activities including antimalarial, anticonvulsant, anti- microbial, and is effective in the relief of menstrual and stomach pain. Lupeol, a pentacyclic triterpenoid was isolated for the first time from the methanol leaf extract of Tapinanthus dodoneifolius and characterized by spectral analysis. Th...