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Recent Submissions
Effect of Soil pH on Composition and Abundance of Nitrite-oxidising Bacteria
(Hibiscus Publisher, 2018-02-02) Abdulrasheed Mansur; Hussein I. Ibrahim; Fatima Umar Maigari; Ahmed F. Umar; Salihu Ibrahim
Nitrification, the microbial oxidation of ammonia to nitrate (NO3-) via nitrite (NO2-) is a vital process in the biogeochemical nitrogen cycle and is performed by two distinct functional groups; ammonia oxidisers [comprised of ammonia oxidising bacteria (AOB) and ammonia oxidising archaea (AOA)] and nitrite oxidising bacteria. Autotrophic nitrification is said to occur in acidic soils, even though most laboratory cultures of isolated ammonia and nitrite oxidising bacteria fail to grow below neutral pH. Published studies revealed that soil pH is a major driver for determining the distribution and abundance of AOB and AOA. To determine whether distinct populations of nitrite oxidising bacteria within the lineages of Nitrospira and Nitrobacter are adapted to a particular range of pH as observed in ammonia oxidising organisms, the community structure of Nitrospira-like and Nitrobacter-like NOB were determined across a pH gradient (4.5 – 7.5) by amplifying nitrite oxidoreductase (nxrA) and 16S rRNA genes followed by denaturing gradient gel electrophoresis (DGGE). The community structure of both Nitrospira and Nitrobacter changed with soil pH, with distinct populations observed in acidic and neutral soils. The abundance of Nitrospira-like 16S rRNA and Nitrobacter-like nxrA gene copies contrasted across the pH gradient. Nitrobacter-like nxrA gene abundance decreased with increasing soil pH, whereas Nitrospira-like 16S rRNA gene abundance increased with increasing pH. Nitrification activity of both Nitrospira-like and Nitrobacter-like NOB in acidic and neutral pH soil was investigated in a microcosm experiment incubated at 30 oC for 21 days, with high rates of nitrification observed in both soils. Findings indicated that abundance and distributions of soil NOB is influence by soil pH.
Effect of Varying Drying Temperature on the Antibacterial Activity of Moringa oleifera Leaf (Lam)
(IOSR Journals (International Organization of Scientific Research Journals), 2015-02-02) Ibrahim I. Hussein; Miriam Mamman; Abdulrasheed Mansur
The use of herbal and medicinal plant for traditional therapeutic measure and health care services began since pre-historical time and currently exploited especially in modern medicine. This study investigated the effects of different drying temperature on the antibacterial activity of ethanolic extract of M. oleifera leaf. Fresh leaves of M. oleifera were dried separately at varying temperature by sun drying, oven drying and air drying methods, grinded into powdered form and extracted with ethanol. The ethanolic extracts were used for antibacterial susceptibility test using agar disc diffusion method. All the three clinical bacterial isolates such as E. coli, S. aureus and S. typhiwere susceptible to the ethanolic extract of M. oleifera leaf which signified its antibacterial potency. The air dried extract produced the highest zones of inhibition than the sun dried and oven dried ethanolic extract with 13 mm and 19 mm, 13 mm and 21 mm, 11 mm and 20 mm as the lowest and highest inhibition zones for E. coli, S. aureus and S. typhi respectively. This study inferred that drying temperature especially higher temperature has profound effects on the antibacterial activity of M. oleifera leaf as active component are depreciated
Other Determinants of Inflation in Nigeria
(European Center of Sustainable Development (ECSDEV), 2020-02-02) Inim Victor Edet; Udo Emmanuel Samuel; Abner Ishaku Prince
Inflation is a continuous macroeconomic concern that has dominated thoughts at major economic fora due to its pervasive effect on the economy. The quantity theory of money isolates money supply as the major cause of inflation. The economic reality in Nigeria contravenes the theory. The study examines other determinants of inflation in Nigeria using the autoregressive distributed lag (ARDL) method on quarterly data from January 1999- December 2018. Findings show that poor infrastructural development, exchange rate, political instability, corruption, and double taxation significantly stimulate inflation rather than just money supply. The results show a causal relationship between other determining factors and inflation. The ARDL result shows a significant long-short run relationship. The study recommends that non-monetary factors of instigating inflation should be controlled and security expenditure should be review along with-related mechanisms to achieve low inflation at single digits at most and economic growth and development.
SARS-COV-2 PANDEMIC ON THE NIGERIAN EDUCATIONAL SYSTEM
(IAEME Publication (International Association of Engineers and Managers), 2020-02-02) Udo Emmanuel Samuel; Abner, Ishaku Prince; Inim Victor Edet; Akpan Ededem Jack
The Covid-19 pandemic has resulted in over 5million confirmed cases and over 300,000 moralities globally. Deteriorating the global economic, financial, and educational climate. Social distancing, self-isolation, and temporarily lockdown across the economic sector as measures to cushion the virus spared led to a decrease in the domestic workforce, revealing the shortfalls in the educational and health sectors. The shift from the conservative classroom learning to electronic learning (Elearning) globally contributed significantly to the sustainability of the educational sector during this pandemic. Evidence from Nigeria revealed a lack of infrastructures, the paucity of funds, policy issues, poor institutional preparedness for unseen eventualities like this pandemic among other factors thwart the smooth shift in Nigeria. It is in tandem with these prevailing issues that this study examines SARS CoV-2 on the Nigerian educational system. Findings show the government's positive efforts and support for online learning at the primary and secondary school levels. In contrast, online learning in government colleges, universities, and the rural communities is a mirage in Nigeria. Three in five students lack access to online education. The study recommends among other things; creative handling of public universities and colleges administration towards ICT adoption and online learning implementation. Development of educational policies and social infrastructures to drive the sector during an unforeseen crisis such as this pandemic, and a review of budgetary allocation to the educational sector to meet the UNESCO standard of 1520% of annual the budget.
Selected Economic Policies on the Growth of Small and Medium Enterprises in Nigeria
(Scientific Research Publishing (SCIRP), 2023-02-02) Francis Sylvanus Udoh; Inim Victor Edet; James Agama Emiesefia; Murat Akyuz
In Nigeria, economic policy should set the parameters in the economic system of the country, which should constitute the key part of the economic practice thereby creating an environment affecting the development and functioning of either collective or individual Small and Medium Enterprises (SMEs) operators and thus logically affecting the sector(s) of the economy. This work examines the effect of selected economic policies on the growth of SMEs in Nigeria. Notwithstanding the attention placed on monetary, fiscal and trade policies, in the overseeing of the economy, the SMEs sector all encompassing, Nigerian economy particularly SMEs are up until the present time of this study not growing as expected. The time frame was from 1986 to 2017, a thirty-two-year study. Research design employed was ex-post facto and a population of seventy-two thousand eight hundred and thirty-eight (72,838) SMEs in Nigeria were used. The sample size was the entire 72,838 SMEs of which the study relied on reports from Central Bank Statistical Bulletin and SMEDAN, thereby employing the Error Correction Mechanism (ECM) tool of analysis to analyze the time series data. The study found that economic policy (proxies: monetary policy, fiscal policy and trade policy) had no positive significant effect on the growth of SMEs in Nigeria. Therefore, the study recommends that economic policy should be design and formulated in such a way that the goals the SMEs want to achieve through monetary, fiscal and trade policies should be realistic and feasible in terms of growth.