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Articles by F.I. Abdulrahman
Total Records ( 5 ) for F.I. Abdulrahman
  J.C. Akan , F.I. Abdulrahman , V.O. Ogugbuaja and J.T. Ayodele
  Problem section: Effluents from the surrounding industries such as tannery and textile are used by vegetable farmers for the irrigation of their crops. These effluents may contain some toxic metals which bioaccumulate along the food chain. Moreover the uptake of such toxic metals by crops is governed by their availability and concentration in the soil. Therefore such crops may accumulate heavy metals in excessive amount in their various parts. This may ultimately, adversely affect humans and other species that depend on such crops for food, hence the need to evaluate the pollutant levels in vegetables samples in these areas. Approach: Six vegetable samples of various organs were freshly harvested from ten farms within the vicinity of Challawa industrial areas. The concentration of heavy metals which include, Cu, Zn, Co, Mn, Mg, Fe, Cr, Cd As, Ni and Pb, were determined using Perkin-Elmer analyst 300 Atomic Absorption Spectroscopy (AAS). Levels of some anions (nitrate, nitrite, sulphate and phosphate were determined using Hach direct reading 2000 Spectrophotometer. Results: The results obtained from this analysis revealed that Cr and Fe shows the highest concentrations, while As shows the lowest levels in the whole vegetable organs studied. The concentrations of the anions ranged between 40.00-1300.00 µg g-1 nitrite, 65-1500 µg g-1 nitrate, 122.00-765.00µg g-1 and 12.00-60.00 µg g-1. The leaves contained much higher concentrations of heavy metals and anions than roots and stems. Conclusions: The concentrations of the above parameters were higher than the FAO, WHO/EU and FAO/WHO allowed limit. The high values might be attributed to the used of untreated effluents from textile and tanneries industries by farmers for the irrigation of these vegetables. Thus, the high values of these trace metals and anions in the vegetable samples could put the consumers of these vegetables at health risk. Further works should be carried out in the soil samples were the vegetables are grown.
  G.A. Dimari , F.I. Abdulrahman , J.C. Akan and S.T. Garba
  An analysis of intestine, liver, stomach and gill tissue concentrations of heavy metals (Cu, Co, Pb, Cr, Mn, Fe, Ni, Cd and Zn) in three commercially important fish species (Tilapia gallier, Crarias lazera and Osteoglossidae. caught within Alau Dam between the periods of January to August, 2007. These heavy metals were determined using Perkin-Elmer AAnalyst 300 Atomic Absorption Spectroscopy (AAS). Heavy metals contents varied significantly (p>0.05) depending on the fish species and on the types of tissues. The concentration of heavy metals in livers and gills tissue were relatively higher than the intestine and stomach tissues of the three species. The distribution of copper and cobalt were in the order of gills>stomach>liver>intestine in the entire fish samples, while the distribution of (Pb, Cr, Mn, Fe, Ni, Cd and Zn) were in the order of liver>gills>stomach>intestine. The concentrations of the entire elements in the three species were within tolerance limits that are safe for human consumption, with exception of lead in gills.
  F.I. Abdulrahman , P.A. Onyeyili , S. Sanni and V.O. Ogugbuaja
  This study investigated the sub-acute effects of aqueous root bark extract of Vitex doniana on some serum elemental components as well as serum biochemical parameters in rats. Serum sodium levels were significantly (p<0.05) increased following extract treatments while those of potassium were decreased. The extract decreased serum calcium concentration but no marked effect was observed on serum phosphorus concentration. The cholesterol level also decreased in the rats treated with higher concentration of extract (100 and 200 mg kg-1), while the protein concentration in the serum of treated animals was comparable with that of control except at 200 mg kg-1 which showed significant (p<0.05) decrease in protein level at 21 days of extract treatment. Levels of liver marker enzymes and blood urea nitrogen in the extract treated rats increased in a dose-dependent manner and could be due to the pathological lesions in the liver and kidney which are the main excretory system. The aqueous extract of Vitex doniana though used for the management of some illness such as diarrhea, jaundice, anemia, mental illness, rheumatism and as tranquilizer in man, has been observed in rats under the conditions of this study to be toxic to both the liver and kidney.
  F.I. Abdulrahman , P.A. Onyeyili , U.K. Sandabe and V.O. Ogugbuaja
  Aim of this study to investigate the effects of aqueous extract of Vitrex doniana on the peripheral and central nervous systems and possibility to use it as folk medicine. The aqueous extract of Vitex doniana was soxhlet extracted with distilled water and concentrated in vacuo to give a yield of 8.5% w/w. The LD50 following intraperitoneal administration was estimated to be 980 mg kgG1. The aqueous extract of Vitex doniana from the study produced substantial depressant effects on both the peripheral and central nervous system. The aqueous extract induced sleep on its own at dose of 400 mg kgG1 and potentiated sodium thiopental sleeping time in a dose dependant manner. It also showed significant (p< 0.05) muscle relaxant activities and produced analgesia and weal anesthetic effect. The extract was able to confer 80% protection to rats treated with convulsive dose of PTZ, while it conferred 100% protection to rats treated with convulsion dose of strychnine.
  G.A. Dimari , F.I. Abdulrahman , J.C. Akan and V.O. Ogugbuaja
  Total suspended particulate matter was collected using SKC side kick sampling pump method from Shukwari Ward of Maiduguri Metropolis, Nigeria between the periods of January to December, 2004 and was analyzed for 13 elements by Atomic Absorption Spectrophotometric (AAS) method. The concentrations of the elements in the entire quarter range from 0.02-5.12 μg m-3. The highest elemental concentrations were observed in the order second quarter (April-June) >first quarter (January-March) >forth quarter (October-December) >third quarter (July-September). The results showed that the concentration of Na, Zn and Ni were highest in the suspended particulate matter, while Cr, Mn and Mg were low. Significant positive linear correlation coefficients among elements in the suspended particulate matter were established, indicating common sources of heavy metal pollution. The concentration of SO4-2- ranged from 250 to 312.50 μg m-3 while NO3- ranged from 9900.00 to 15033.33 μg m-3. The concentrations of the elements, SO42- and NO3 in the suspended particulate matter exceeded the limits set by WHO and FEPA.
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