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Search Results: 1 - 10 of 537244 matches for " A.O. Okpanachi "
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Effect of Aqueous-Methanolic Stem Bark Extract of Acacia polyacantha on Blood Glucose Levels on Normoglycemic Wistar Rats
A.O. Okpanachi,A.D.T. Goji,I. Ezekiel,K.Y. Musa
International Journal of Animal and Veterinary Advances , 2012,
Abstract: This study was carried out to investigate the blood glucose reducing effect (hypoglycemic effect) of stem bark extract of Acacia polyacantha on normal wistar rats over a 24 h period. Three groups of previously fasted wistar rats, with each group made up of 5 rats each were administered with 100, 200 and 400 mg/kg p.o of aqueous methanolic stem bark extract of A. polyacantha. The hypoglycemic effect of A . polyacantha stem bark aqueous methanolic extract was compared with that of Metformin (250 mg/kg) in fasted normal rats. Following treatment, relatively moderate to high doses of A. polyacantha (100, 200 and 400 mg/kg p.o.) produced a dose-dependent, significant reduction (p<0.05) in blood glucose levels of fasted normal rats. The three doses of the extract did not significantly alter the blood glucose levels after 2 h of extract administration. After 8 and 16 h of extract administration at a dose of 200 mg/kg significantly (p<0.05) decreased the blood glucose levels when compared to control, while the dose of 400 mg/kg significantly decreased the blood glucose levels after 4, 8 and 16 h of extract administration when compared with the control group. The Preliminary phytochemical screening revealed the presence of alkaloids, tannins, flavonoids, triterpenoids, anthraquinones, steroids and saponins. The median lethal dose (LD50) in rats was calculated to be 3807.9 mg/kg body weight. In conclusion the aqueous methanolic extract of Acacia polyacantha possesses hypoglycemic activity in normoglycemic rats.
Study of the Effect of Aqueous Extract of Kolanut (Cola nitida) on Gastric Acid Secretion and Ulcer in White Wistar Rats
J.A.Tende,I. Ezekiel,S.S. Dare,A.O. Okpanachi
British Journal of Pharmacology and Toxicology , 2011,
Abstract: Generally, increase in the acid output in the body causes ulcer especially peptic ulcer. Duodenal ulcer has worldwide incidence but its incidence varies geographically and even in some country regionally. Duodenal and peptic ulcer diseases are problems of the gastrointestinal tract. Nowadays, drugs are expensive and have many side effects during treatment of any disorders. In this study the aqueous extract of cola nitida was administered to 30 Wistar rats in two phases (gastric acid secretion phase and ulceration phase). The ulcer score and gastric acidity were determined. The highest acid output was obtained with a dose of 7.5 mg/mL and the lowest with a dose of 5.0 mg/mL. However no ulceration was seen with the same doses of cola nitida, this may mean that formation of ulcerations may not be only due to increase acidity or probably the doses used was not enough to cause ulceration. Comparing this with control group gave a significant difference for the gastric acid secretion group, though there was no ulceration formed with the same dose. The result of this study showed that cola nitida induces gastric secretion.
Numerical Computations to Produce Cokeable Coal Blends at The Ajaokuta Steel Plant, Nigeria  [PDF]
A.O. ADELEKE, P. ONUMANYI
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2007, DOI: 10.4236/jmmce.2007.62010
Abstract: A mathematical model and its associated numerical search algorithm has been developed for routine coal blending to include local coals for cokemaking at the Nigerian blast furnace-based Ajaokuta Steel Plant. A typical binary blend proposed using the model includes 28.38% and 29.00% of the ash- laden Lafia and non-caking Okaba coals, respectively. The proposed blends satisfy basic chemical and mechanical strength requirements at the lowest cost per ton of coal. The blending calculations showed that only low ash, low sulphur, medium volatile and high vitrinite reflectance prime grade coals such as the UK Ogmore should be imported for blending with the ash-laden medium coking Lafia coal. When the proposed blends are successfully confirmed with bench and pilot scale carbonization tests, cokemaking at Ajaokuta will be conducted with substantial savings in foreign exchange.
Effects of Stamped Charging on the Strength of Coke from the Weakly Caking Australian Agro-Allied Coal Blend Mixed with Coke Breeze  [PDF]
A.B. Adahama, A.O Adeleke, A.O. Olulana, S.A. Ibitoye
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2008, DOI: 10.4236/jmmce.2008.74027
Abstract: The weakly caking Australian Agro-Allied coal sample mixed with 7% un-reactive coke breeze was subjected to stamped charging prior to carbonization for 22 hours in a 250kg pilot plant to improve the resulting coke strength. The coal was carbonized with a bulk density of 1,000kg/m3 and heating flue temperature of 1,340℃. The screen distribution analysis and the micum tests conducted on the coke gave M10 and M40 of 15.90% and 73.20%, respectively. These results show that the Agro-Allied coke produced is inferior to the coke from a normal top charged counterpart with M10 and M40 indices of 15.40% and 78.20%, respectively and do not satisfy the requirements for the blast furnace ironmaking process. These results thus suggest that the stamped charging coking improvement method designed for high caking, high volatile coals may not be able to improve the strength of coke resulting from a weakly caking, medium volatile coal mixed with coke breeze.
A determina??o espectrofotométrica do cobalto pelo método da 2,2'dipiridil cetoxima (II) - escolha do solvente e estudos sobre a extra??o do composto
Jacintho, A.O.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1975, DOI: 10.1590/S0071-12761975000100023
Abstract: this paper belongs to a series of articles about the 2,2'-dipyridyl ketoxime method for the espectrophotometric determination of cobalt. it presents a study on the extration procedure of the color compound formed by using chloroform or dichloromethane. it was established that the former is more efficient than the latter one. the region of maximum absorption of the color compound in chloroform is between 375 and 390 nm. on the other hand, 3.0 ml of the solvent, is sufficient for the extration of the water-soluble chelate obtained from 5.0 micrograms of cobalt, with a shaking time of 15 seconds. the color compound is stabile both in contact with the solutions (120 minutes) and after extration with chloroform (180 minutes).
A determina??o espectrofotométrica do cobalto pelo método da 2,2'-dipiridil cetoxima (I) - estudos sobre o reativo, pH e tamp?o
Jacintho, A.O.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1975, DOI: 10.1590/S0071-12761975000100019
Abstract: the initial studies are presented, relative to the experimental part of the method of the 2,2'-dypiridyl ketoxime, for determination of cobalt. the preparation technique of the reagent from the corresponding ketone was presented. the use of 1.0 ml of the 1% reagent solution in 80% ethyl alcohol was suggested, for the determination of up to 10 micrograms of cobalt. the above solution was tested until 90 days after it's preparation, and no alteration was detected. the best ph conditions, for the formation and extration of the colored compound is between 7.0 and 8.0. among several buffer solutions used, the most efficient was the one prepared with sodium citrate 1 molar, triethanolamina (1+2), in the proportion of 2:1, after ascertaining the ph at 7,8 with 30% citric acid. studies about solvents, effects of several ions and the application of the method to plant analysis, will be presented later.
A determina??o do cobre pelo método calorimétrico do dietilditiocarbamato de sódio
Jacintho, A.O.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1967, DOI: 10.1590/S0071-12761967000100033
Abstract: a study is made on several aspects of the spectrophotometric method for the determination of copper by sodium diethyldithiocarbamate (ddc-na). from this work could be observed that: a) the ideal amount of reagent a 1% of (ddc-na) aqueous solution, was 1 ml and it was observed that the reagent keeps well until 40 days after its preparation. b) the absorbancy of the copper diethyldithiocarbamate (ddc-na) solutions, to a certain limit is independent of the amounts of edta na2. but, in the absence of edta-na2 the amounts of copper added where not recovered, when working with pure solutions. c) among the solvents used, carbon tetrachloride was considered the most appropriate. d) ddc-cu in ccl4 shows maximum absorption in the wave lenght range 430-435 milimicrons. the greatest sensibility was obtained with filters numbers 42 and 44 (klett-summerson). e) interferences of the ions studied were eliminate, by the use of edta-na2 only. f) in this procedure, the ddc-cu is stable until 45 minutes. g) the method obeys beer's law in the range of 5-50 ppm, and shows good accuracy. h) the recommended procedures for the determinations of total copper both in plants and soils by the ddc-na, are considered efficients.
A determina??o espctrofotométrica do cobalto pelo método da 2,2' dipiridilcetoxima (III): .efeito de diversos íons, remo??o das interferências
Jacintho, A.O.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1976, DOI: 10.1590/S0071-12761976000100003
Abstract: in the spectrophotometric determination of cobalt with 2,2'-dipyridyl ketoxime, the effects of several ions were studied. among tre ions studied, only cupric nichelous, ferric and manganous cations interfered. the interference caused by cupric, nichelous and ferric cations was iliminated by a second extraction of the colored compound with a 2n hydrochloric acid solution. the interference, of the manganous cation, disappear when cobalt is determined in the presence of other ions.
Mitochondrial DNA D-loop analysis of South Western Nigerian chicken
Adebambo,A.O.; ,;
Archivos de Zootecnia , 2009, DOI: 10.4321/S0004-05922009000400001
Abstract: mitochondrial dna (mtdna) d-loop segment was sequenced for a total of 98 individuals of domestic chicken from south western nigeria. domestic chicken populations were: anak titan (israeli breed,n= 1), frizzle (n= 16), opipi (n= 5), frizzlexopipi (n= 5), fulani (n= 4), giriraja (indian breed,n= 3), normal (n= 55), naked neck (n= 8), yaffa (n= 1). the sequences of the first 397 nucleotides were used for the analysis. seventeen haplotypes were identified in the samples, 15 for nigerian indigenous chicken population, 1 for giriraja and 1 for anak titan from 23 polymorphic sites. phylogenetic analysis shows that nigerian indigenous and anak titan chicken were all grouped under clade iv, while the indian giriraja was under clade iiic. clade iv had 16 haplotypes, while clade iiic had one haplotype. amova analysis indicates that 97.32% of the total sequence variation between haplotypes was present within population and 2.68% between populations. our results suggest single multiple maternal origins for the south western nigerian domestic chicken.
Malaria morbidity amongst hospital workers in Ilorin
A.O. Awoyemi
African Journal of Clinical and Experimental Microbiology , 2003,
Abstract: A study of malaria as a cause of morbidity among the staff of the University of Ilorin Teaching Hospital, Ilorin, Nigeria was carried out from August to October 2001. Patients attending a community based Health Centre was used as control. Malaria accounted for 43.0% of illnesses among the workers and 36.7% in the general public. Malaria was responsible for nearly two-thirds of sickness absence and for 48.6% of days lost due to illnesses. Also the disease was responsible for 50 percent or more of sickness absence among all categories of workers when analyzed by occupations. These findings show that malaria could disrupt the health care delivery of a country since it could affect even health workers. By extension too, it could result in the disruption of the economic activities of the country and result in low productivity if not effectively controlled. It I therefore recommended that all efforts at effective controlling malaria should be put in place in Nigeria. (Af. J. of Clinical and Experimental Microbiology: 2003 4(1): 18-23)
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