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Search Results: 1 - 10 of 293 matches for " EO Wango "
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Influence of age of mice on the susceptibility to murine schistosomiasis infection
DS Yole, SK Gikuru, EO Wango, KO Kitome, S Kiarie, M Limo
African Journal of Health Sciences , 2006,
Abstract: Intensity of human schistosomiasis infection increases with age, a peak being attained at early puberty. Hormones could be involved in the age-related changes in susceptibility to schistosomiasis. Male BALB/c mice were infected with Schistosoma mansoni either before or after puberty and worm numbers, cellular immune responses, hormonal levels and pathology analysed. Pre-puberty infected mice had a significantly higher number of adult worms (p<0.05), more severe granulomas, higher mortality rate and higher proliferative responses as compared to postpuberty infected mice. Levels of the hormones were lower in the pre-puberty infected mice as compared to the post-puberty group early in the infection. Plasma levels of testosterone and luteinizing hormones decreased significantly (p<0.05) in infected mice when compared to controls. Susceptibility to S. mansoni in male BALB/c mice seems to be influenced by levels of testosterone and leutenizing hormone at infection. Albeit, an infection with S. mansoni seems to lower the hormonal levels. African Journal of Health Sciences Vol. 13 (1-2) 2008: pp. 47-54
Assessing the Suitability of the WorldClim Dataset for Ecological Studies in Southern Kenya  [PDF]
Tim J. L. Wango, Douglas Musiega, Charles N. Mundia
Journal of Geographic Information System (JGIS) , 2018, DOI: 10.4236/jgis.2018.106033
Abstract: There have been numerous efforts to generate freely available climatic datasets for use in species distribution models, the most popular being the global climatic dataset known as WorldClim. The availability of such datasets is invaluable to scientists as many studies are performed in remote areas where no weather stations are found. However, many users do not critically assess the suitability of these datasets for their applications, and errors associated with global datasets are often assumed to be negligible. Understanding what a climate dataset can or cannot deliver requires the user to have a working knowledge of what the basic spatial climate-forcing factors are at the scale of his/her study, and to have a good understanding of the uncertainty in the dataset. In geographic studies, uncertainty is often described by the degree of error (uncertainty), or degree of accuracy (certainty) in data, and thematic uncertainty refers to the uncertainty in measures made for each variable, whereas temporal uncertainty refers to the uncertainty in time period represented by each variable. Here, we used climatic data from weather stations to investigate the climate-forcing factors in southern Kenya, and then used this weather station data to investigate the uncertainty in the WorldClim dataset. Results indicated that the nineteen core Worldclim variables, known as bioclimatic variables, accurately depicted the local variations in climate in the study area. However, whereas the monthly and seasonal temperature variables represented the same time period in different locations, the same was not true for the monthly and seasonal precipitation variables. The onset of rains is a key biological indicator, and scientists studying phenomena tied to the onset of rains need to keep in mind the temporal variations represented in the WorldClim dataset.
Comparison of nest shapes and densities of two sympatric species of Cubitermes (Isoptera: Termitidae: Termitinae) as clues for the study of their population dynamics
Solange Patricia Wango,Guy Josens
African Zoology , 2011,
Abstract: Two species of Cubitermes coexist in the grassy Loudetia Savanna of Bondoé, in the Central African Republic, namely C. sankurensis (Wasmann, 1911) and C. ugandensis (Fuller, 1923) Despite the obvious size difference between individuals their nests have the same general shape but there are significant, though small, differences in height, diameter, number of caps, surface and volume. The closest correlations between these five parameters can be seen between the surface and the volume of the nests. The regressions between these two parameters are identical for both species; the addition of a first cap decreases the volume/surface ratio but a second or third cap does not alter this ratio further. Three apparent age classes have been attributed to the nests based on their external appearance: recent, eroded, and dilapidated. The great density (1297 nests/ha) and abundance of the nests that are dilapidated but still occupied by a declining population clearly suggests that the pressure from predation is weak. This study suggests that the environmental conditions are more influential than the species in shaping the mounds and tentative population dynamics of the termite mounds of Bondoé are outlined.
Speciation of Heavy Metals in Sediment of Agbabu Bitumen deposit area, Nigeria
Journal of Applied Sciences and Environmental Management , 2010,
Abstract: Speciation of heavy metals Cu, Cd, Pb, Ni, Zn, Mn, Fe, Cr and Hg was carried out on sediment of Agbabu with a sequential extraction procedure in the dry and rainy seasons of year 2008. Hg was not detected in all the fractions in the two seasons. In the dry season, all the metals were mostly abundant in Fraction-5, however, Cr (30%) and Mn (23.73%) had high abundance in Fraction-1, Zn (30.97%) was high in Fraction-III, Cu (45.14%) and Fe (31.67%) were also high in Fraction-4. In the rainy season, Cr (35.82%) was mostly abundant in Fraction-1, Zn (36.71%) was high in Fraction-3, Cu (29.28%) was high in Fraction-4 and the remaining metals were mostly abundant in Fraction-V. From the results of the two seasons, the metals had high abundance in Fraction-5 indicating firstly, low mobility and bioavailability, secondly, low degree of pollution by the metals considered and thirdly, the origin of the metals in the environment was likely to be lithogenic. The average potential mobility was calculated for the metals in the two seasons and the following decreasing order was obtained: Cr>Zn>Cu>Mn>Fe>Cd>Ni>Pb>Hg. @JASEM J. Appl. Sci. Environ. Manage. December, 2010, Vol. 14 (4) 47 - 51
Networks, Micro Small Enterprises (MSE’S) and Performance: the Case of Kenya
EO Abeka
African Research Review , 2011,
Abstract: This paper examines the role of informal personal networks in determining Micro Small Enterprises (MSE’s) success in Kenya. It adopts the network perspective theoretical approach. Empirically, the paper finds that MSE’s in Kenya get around market failures and lack of formal institutions through entrepreneurial personal network as a copying strategy in the process of global transformation to bridge the entrepreneurial global divide. General hypothesis predicting the ‘likelihood of MSE’s with better network performing better’ is supported by performance models though pro-poor growth is evident with an average business performance. Network strategies to promote small enterprises are recommended to policy makers, donors and actors in the field against those of the failed traditional strategies. However, there are few empirical studies available in this area particularly in less developed countries; therefore further research is necessary in this direction.
Views of Physics Teachers in Ilorin Metropolis on the Impact of Religion on the Way the Applicants of Physics are utilized
EO Omosewo
African Research Review , 2009,
Abstract: In this study, efforts were made to find out the views of 47 Physics Teachers in Ilorin metropolis on the impact of religion on the utilization of the applications of Physics. Thirty of them were Christians while Seventeen were Moslems. The instrument was a questionnaire comprising 12 statements. Findings from the study showed that respondents agreed with the peaceful use of the applications of Physics. They also agreed with the fact that attack should be mounted on any nation that wants to fight us with their offensive weapons. Relevant recommendations were made.
Breaking the Vicious Cycle in Irrigation Farming System for Sustainable Food Security in Nigeria
EO Oriola
African Research Review , 2009,
Abstract: This paper is a pilot investigation into irrigation activities and the need for a reform to attain food security in Nigeria. Oke-Oyi irrigation project of the Lower Niger River Basin Development Authority, Ilorin was chosen as epitome of irrigation projects in Nigeria. Structured questionnaire were administered on the 135 farmers participating in the project for detailed analysis. Past and present project officers were also interviewed. Simple percentages were used to summarize the data for discussion. The study revealed that the services of the irrigation agency is poor and grossly inadequate, revenue from irrigation farming cannot meet the cost let alone aiding further investment. The farmers do not have access to farm inputs such as fertilizer and micro credit among others. The paper is of the opinion that a reform in this sector will transform irrigation system towards a path of sustainable food security. Key Words: Irrigation, vicious cycle, food, sustainable, security
Nigeria’s Nascent Democracy and ‘WAR’ Against Corruption: A Rear View Mirror
EO Ojo
African Research Review , 2011,
Abstract: One of the problems facing the nascent democracy in Nigeria which is more pressing than economic development is the high rate of brazen corruption in virtually all facets of the polity’s national life. Thus, the thrust of this paper is a review of the recent ‘WAR’ against corruption in Nigeria. The paper surveys a number of manifestations of corruption in the body politik and the country’s woes. The paper however infers that unless the institutional mechanisms put in place are rejuvenated coupled with political will on the part of the political actors, the so-called war may be a mirage after all.
Views of Physics Teachers on the Need to Train and Retrain Physics Teachers in Nigeria
EO Omosewo
African Research Review , 2009,
Abstract: Teacher education is an important enterprise because no education can rise above the quality of its teachers. The number of physics teachers is not as desired in Nigerian secondary schools. Many schools do not have physics teachers (Omosewo and Salami, 2002). For this reason, teachers that were teaching integrated science did not teach the physics aspect of the subject. Therefore, very few students offer physics at the senior school level because physics was strange (since they were not taught at the junior secondary school level) to students. Also, teachers that taught physics at the senior secondary school level could not teach some topics well because they were not taught while at their colleges/universities (Omosewo 2001). One hundred and thirty five physics teachers were sampled in Kwara State of Nigeria on the need for training teachers by giving them questionnaire to fill. The teachers recommended that prospective physics teachers should register for physics courses that they are going to teach at the secondary school level. They also recommended that scholarship should be granted to candidates willing to read physics education in the university and also that there should be in-service training for those on the job. Relevant recommendations are made.
Actualizing Nigeria s Vision 20:2020 Goals: Imperativeness of Arts and Social Science Education
EO Erhagbe
African Research Review , 2012,
Abstract: An extant national expectation in present day Nigeria, is the projection by way of “Vision 20: 2020” that come the year 2020, Nigeria would have so transformed and developed economically that it would rank among the first twenty top economies in the world. Based on the resources of the Country, both human and material, this target would ordinarily be attainable. Unfortunately however, the present developmental indicators in the Country, including, poor infrastructural base, epileptic power supply, palpable insecurity and the reverse order of industrial development, whereby existing manufacturing industries are folding up, all point to the fact that on a realistic assessment, this target is a mirage. Worse still, is the monumental corruption and inept leadership in the country. Thus the most crucial missing link in Nigeria s drive towards the attainment of “the Vision” is having the right crop of leadership. Furthermore, there is an urgent need to re-orientate the society, especially the leadership, in terms of values, norms, and acceptable conduct, and the most veritable instrument for achieving this is through education. It is in this context that the usefulness and the need to stress Arts and Social Sciences education is strongly advocated.
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