ABSTRACT The greater Taita community lives in crowded parcels of land that are intensely used to generate household food and family income. Wundanyi division which is the district headquarters is divided into Upper, Medium and Lower zones and has a high population density of 92 persons per Km2. Each household is estimated to generate 95 % of economic income from agriculture. High population, overdependence on agriculture and low income can have adverse effects on soil fertility. The objective...
ABSTRACT Formaldehyde is one of the smallest organic molecules with a wide range of uses in the society. It is used in cosmetics as a preservative. Formaldehyde and formaldehyde releasers are contained in some cosmetics; hair products, shampoos, nail products, lip and dental care products, deodorants, antiperspirants, shaving products, swipes, among others. It is also used in the pharmaceutical industry and in the manufacture of resins and adhesives, permanent press fabric treatments, tissue ...
ABSTRACT Safe and readily available water is important for public health, whether it is used for drinking, domestic use, food production or recreational purposes. Consumption of contaminated water may lead to acute and chronic health effects. The most common water pollutants include heavy metals, pesticides, and anions such as fluorides, arsenic, arsenite, chromate and selenate, which cause various diseases such as brain, liver and bone ailments. Among the pollutants, fluoride is the most occ...
ABSTRACT The mesocarp (edible part) of Mangifera. indica L. (mango) is known for its contribution towards addressing nutritional challenges that face most of the developing countries. Based on the Recommended Daily Allowance (RDA) recommended levels by National Research Council (NRC) USA, mangoes would provide sufficient amounts of essential minerals, sodium (Na), potassium (K), magnesium (Mg), calcium (Ca), Zinc (Zn), copper (Cu), iron (Fe) and manganese (Mn). However, as a result of consumi...
ABSTRACT The Lagos lagoon system is the main water body in Lagos State and it is highly polluted. It receives enormous amount of domestic and industrial wastes from rivers and creeks. In this study, three main Lagos trans-urban streams Odo-lyaalaro, Shasha and Ibeshe creeks that empty into the Lagos Lagoon were examined. For the study, samples were collected bimonthly for a year and the physicochemical properties of both the water and sediments were determined. The pseudototal heavy metal con...
ABSTRACT A novel biosensor for hydrogen peroxide was constructed based on the immobilization of horseradish peroxidase on zinc oxide-multiwalled carbon nanotubes matrix. The model redox enzyme, horseradish peroxidase (HRP) was physically (physical adsorption) immobilized on the ZnO/MWCNT modified electrode surface. UV-Visible spectra of HRP and HRP/ZnO/MWCNT displayed soret bands at 407 and 390 nm, respectively and thus the immobilised HRP retains its native structure. The modified electrode...
ABSTRACT Polycyclic aromatic hydrocarbons (PAHs) are known for their carcinogenic and mutagenic properties. They are formed from incomplete combustion of organics such as fossil fuels among others. PAHs are found in foods and in the environment. In this study, the concentration of PAHs and their potential risks were determined in smoked fishes, roasted foods, soils and plant samples in the Lagos metropolis, Nigeria. Smoked and raw fishes (Arius heude loti (catfish), Cynoglossus senegalensis ...
ABSTRACT This work was aimed at determining the concentration of four trace metals: cobalt, copper, nickel and zinc in soil. Samples were collected from both cultivated and uncultivated farmlands in Giri. The results obtained showed that the concentrations of cobalt, copper, nickel and zinc in cultivated lands are 0. 138ppm, 0. 134ppm, 0. 126ppm and 0.224ppm respectively. And the concentrations in uncultivated lands are 0. 112ppm, 0. 126ppm, 0.262ppm and 0.224ppm for cobalt, copper, nickel an...
ABSTRACT The level of Cd, Co, Cu, Mn, Ni, Pb and Zn in fish and sediments of Rivers within the Kaduna South Jndustrial Zone were determined by flam e atomic absorption spectrophotometry. The HN03 - I-1202 digestion.... s ystem was used to digest the fish sample far trace m etals det ermination. Tire HN03 - H202 digestion method gave good recoveries which vCiries within 80-95 % for Cd, 85-97% for Co, 81-99% for Cu, 79-97% for Mn, 81-93% for Ni, 87- 98% for Pb Clnd 77 - 98% for Zn in a fish smn...
ABSTRACT Co111positc soil samples were collected rnmlomly within Gwagwul8da, Kujc ami Kw;di 1 t.:n Councils or the Federal Capit:d Territory (FCT), /uja. The sarnpks were mwlyscd lr pH. percentage organic mutter, exchat1gcablc bases, cxchallgcahlc acidity. c!Tective cntion cxclwngc cnpacity (ICEC), perccnt;1gc base saluratioll, available lllclal clclllclltS, the toltd levels or COIICl'lltratiollS of the lllCtal clclllCiltS. chcrnical IJ·actiOIIS of 11lallgallCSC, LillC dctl:ity, te...
ABSTRACT This study reports for the first time in Ghana long-term monitoring of heavy metal contamination of vegetables. As reliable residue data analysis resulting from monitoring programs in foods is of great value to the general populace; this could address the possible risk of heavy metal exposure to human health. In this study, monitoring of heavy metals (As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in consumable vegetables was assessed for a period of 2 years, 2013-2014. In all, a total o...
ABSTRACT The starches of corms and cormels of red and white cocoyam (Colocasia esculenta) varieties, cassava (Manihot esculenta), sweet potato (Ipomea batata), bitter yam (Dioscorea dumentorum) and water yam (Dioscorea alata) were extracted. Their proximate compositions, physicochemical properties, mineral compositions and antinutrient contents were analyzed. The results of the proximate analysis (pWCCM (corms of white cocoyam)>WYAM>SPOTA>WCCL >RCCL (cormels of red cocoyam)>CASS. The darkest ...
ABSTRACT The efficiency of oil remediation of crude oil contaminated soils was analyzed in this work. Factors such as (a) volume of oil spilled, (b) volume of detergent used (c) weight of soil and (d) contact time between oil and soil were isolated for their effect on efficiency. The result shows that the efficiency of remediation by detergent leaching of soil is a function of the following parameters, volume of detergent used, weight of soil and contact time. As expected, plots of volum...
SYNTHESIS AND 1HNMR CHARACTERIZATION OF Co(II) AND Fe(II) COMPLEXES OF MIXED SCHIFF BASE LIGAND DERIVED FROM SALICYLALDEHYDE AND 2-HYDROXY-1-NAPHTHALDEHYDE WITH 2-AMINOPHENOL A RESEARCH PROJECT BY NKEMJIKA, EMMANUEL EKE 12/SC/CH/256 SUBMITTED TO DEPARTMENT OF CHEMISTRY FACULTY OF SCIENCE UNIVERSITY OF UYO, UYO AKWA IBOM STATE IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF BACHELOR OF SCIENCE (B.Sc.) DEGREE IN CHEMISTRY ...
Abstract: A comparative study was carried out on the effect of grilling height on the extent of accumulation of the 16 US EPA priority PAHs and some volatile (As and Hg) and non-volatile (Mn, Cu, Pb, Cr, Cd and Ni) heavy metals in two kinds of roasted foods; yam (Dioscorea Rotundata ) and plantain (Musa Paradisiaca) commonly consumed in Nigeria. Yam and two variants of plantain (unripe and ripe) were considered for this study. Two grilling heights (10 cm and 20 cm) were employed on each of th...