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Articles by A.O. Afolabi
Total Records ( 4 ) for A.O. Afolabi
  A.A. Raheem , O.A. Adenuga and A.O. Afolabi
  Dwellers along the coastline area of Lagos state, Nigeria are exposed to abundant supply of the natural resources of Atlantic ocean and Lagoon water and may not have the privilege of having potable drinking water at their disposal for producing concrete. This study evaluates the characteristics of concrete produced with Atlantic ocean and Lagoon water. Concrete produced with tap water (regarded as potable drinking water) serves as the control experiment. Compressive strength, workability and density were used to evaluate the characteristics of concrete specimens. All the concrete samples have true slump with Lagoon water concrete having low workability and both tap and Atlantic ocean water concrete having medium workability. The concrete specimens produced with the three types of water fall into the category of normal weight concrete as their densities lie within the range of 2200-2600 kg m-3 specified. The 28th day compressive strength of concrete specimens produced with Atlantic ocean, tap and Lagoon water are 25.0 and 33.5 N mm-2, 17.9 and 28.6 N mm-2 as well as 15.1 and 19.4 N mm-2 for mix ratios 1:3:6 and 1:2:4, respectively. It was concluded that tap water should be used in mixing concrete where strength is of major concern, Atlantic ocean water could be used where early strength is required and Lagoon water should only be used for general concrete works where strength is of less importance such as in mass concrete, floor screed and mortar.
  R.E. Akhigbe , S.F. Ige , A.O. Afolabi , P.I. Oyeyipo , F.O. Ajao and F.A. Ajayi
  This study was designed to investigate the effect of combined oral contraceptive (OC) on water consumption, urinary output and serum levels of sodium, potassium and calcium. Twenty female rats were used. Rats were distributed into two groups, control and OC-treated groups, with ten rats in each group. OC-treated group took combined OC, containing 1.0 μg ethinyloestradiol and 10.0 μg norgestrel intragastrically for nine weeks. Both groups fed on standard rat chow and were allowed free access to water throughout the nine weeks of experiment. Water consumption and urinary output was noted and recorded during the experiment period. After the experiment period, rats were sacrificed and serum levels of sodium and potassium were determined in both groups using the flame photometry method, while serum calcium level was determined in both groups using cresolphthalein complexone. There was significant decrease in water consumption and urinary output. No significant differences were found in the mean serum levels of sodium, potassium and calcium.
  A.O. Afolabi , V.O. Mabayoje , V.A. Togun , A.S. Oyadeyi and Y. Raji
  The study was designed to compare the relative performance of students admitted into the Medical Programme through Pre-degree Science with those of students admitted through the Joint Admissions and Matriculation Board (JAMB). The performance indices used were the University 100 level Cumulative Grade Point Average (CGPA) and Physiology examination score during the 200 level Comprehensive Examination. The files of students admitted into the Medical Programme in 1998/1999, 1999/2000 and 2000/2001 Sessions were obtained from the Faculty of Basic Medical Sciences. The following data were extracted from each file-age, sex, school certificate result, mode of entry (JAMB, Pre-degree, Direct at 100 level or transfer at 200 level), 100 level CGPA and Physiology score in the 200 level Comprehensive examinations. The study showed that the students admitted through JAMB performed better in 200 level Physiology examinations but there was no correlation between the University Matriculation Examination (UME) Scores and the O-Level aggregate, 100 level CGPA and 200 level Physiology results. The Pre-degree examination score however showed a strong positive correlation with the O-Level aggregate, 100 level CGPA and the 200 level Physiology examination scores. It is therefore recommended that the Pre-degree examination results be used in admitting students into Medicine, as it is a more reliable predictor of success in Medical School Examinations.
  R.E. Akhigbe , S.F. Ige , A.O. Afolabi , O.M. Azeez , G.J. Adegunlola and J.O. Bamidele
  In view of the association of various haemoglobin genotypes and blood groups with different pathological conditions and the risk of alloimmunization from allogeneic blood transfusion seen in patients with sickle cell disease, the incidence of haemoglobin variants, ABO and Rhesus (Rh) blood groups in Ladoke Akintola University of Technology (LAUTECH), Nigeria, was assessed. This is a retrospective study using medical records of 1122 students (between 18-25 years old) of LAUTECH. Out of the 1122 students, 71.03% were HbAA, 22.19% HbAS, 5.26% HbAC, 0.54% HbSS, 0.80% HbSC and 0.18% HbCC. No incidence of HbSS, HbSC and HbCC in male. The frequencies of A, B, AB and O blood groups were 21.30, 22.73, 2.85 and 53.12%, respectively. The 93.32% were Rhesus positive (Rh+), while the remaining 6.68% were Rhesus negative (Rh¯). Results from this study show a low prevalence of abnormal haemoglobin variants. Blood group O was most predominant, while blood group AB was least dominant. In conclusion, this study shows that there is a decline in the prevalence of haemoglobinopathies in the studied area. Also, routine haemolysin test should be conducted on every group O blood before blood transfusion to reduce the risk of transfusion reaction since some group O blood, which is the predominant blood group, is known to contain immune haemolytic antibodies.
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