Articles
Page 2 of 1206, showing 50 records out of 60296 total, starting on record 51, ending on 100
January 2021
International Journal of Physical Sciences
Evaluation of simulated rain-based attenuation techniques at k-v frequency bands for satellite services under different modulation techniques over Southwestern Nigeria
Rain-based attenuation (RBA) is a major deteriorating factor affecting radio wave signals operating at microwave and millimetre wave bands for a typical Earth-Space Communication Link (ESCL). Although the international telecommunication union (ITU) recommended a standard model for predicting RBA along the terrestrial and ESCL, the technique underperforms in tropical environments. However, the model can be supported by...
January 2021
Journal of Agricultural Extension and Rural Development
Aquaculture extension service in Kenya: Farmers and extension officers perspectives
A cross-sectional study was undertaken to examine the aquaculture extension service in Kenya. Primary data was collected using a semi-structured questionnaire administered to 292 randomly selected fish farmers and 56 extension officers in different counties in Kenya. Descriptive statistics mainly mean and frequencies were computed to determine key characteristics of farmers and extension officers. Inferential...
January 2021
African Journal of Microbiology Research
Isolation and Characterization of Bacteria from Lakes Olbolosat and Oloiden, Kenya
There is still unexplored reservoir of microorganisms from sediments and water within Lakes Olbolosat and Oloiden using culture dependent technique. The current study compares bacterial diversity within Lake Olbolosat a freshwater lake and Lake Oloiden a saline alkaline lake. Out of 60 isolates obtained from sediments and water samples, 35 were from Lake Olbolosat and 25 from Lake Oloiden. Microbial count ranged between...
January 2021
African Journal of Environmental Science and Technology
Current situation of solid waste management in East African countries and the proposal for sustainable management
Effects of unsustainable solid waste management are found all around the world but it is worse in developing and under developed countries like East African Community (EAC) countries. A big proportion of their solid waste is not properly managed. This paper highlighted the situation of solid wastes management in EAC countries and compared with other countries. More than 62.5% of generated solid waste in EAC is organic,...
January 2021
African Journal of Microbiology Research
Antibiotic resistance in food producing Animals in West Africa French speaking countries: A systematic review
This review aimed to make an inventory of the relevant work carried out on antibiotic resistance in the animal sector during the last two decades in French-speaking countries of the West African sub-region. English and French published articles from 2000 to 2019 indexed in PubMed, Google Scholar, and African Journals Online were reviewed in accordance with an adapted PRISMA guideline. Mean Resistance (MR) and...
January 2021
African Journal of Medical and Health Sciences
Predictors of HIV disclosure amongst people living with HIV/AIDS at the University of Calabar Teaching Hospital Calabar, Cross River State, Nigeria
HIV serostatus disclosure is a challenging but yet an important step necessary for all people living with HIV/AIDS. However, divulging such sensitive information by people Living with HIV/AIDS (PLHIV) may be linked with severe consequences which poses as a hindrance to seeking treatment and adherence. This study therefore aims to determine the prevalence and identify determinants of HIV status disclosure among...
January 2021
Scientific Research and Essays
Analysis of the antimicrobial action of copaiba oil and endodontic substances against anaerobic bacteria
Endodontic infections are polymicrobial and predominantly caused by anaerobic bacteria and some facultative bacteria. The list of microorganisms involved in endodontic infections keeps expanding and has the potential to become increasingly more accurate during the next few years. Copaiba oil is an important Amazonian herbal medicine commercialized worldwide. In this study, we evaluated the antimicrobial activity...
January 2021
African Journal of Business Management
Credit availability for the performance of micro and small enterprises in Afar Region: Case study of three selected zones, Awssa, Kilbat and Gabii
Micro and small enterprises (MSEs) aid the growth of national economy to assume increasing importance especially in job establishment, poverty reduction and reducing income variation. Numerous organizations have treaded in to finance their operations, resolve this problem and uphold their commercial success. This study was therefore conducted to investigate the effect of financial factors on success of MSEs business...
January 2021
African Journal of Plant Science
Association between agro-morphological traits in common bean under organic fertilization management in Brazil
The objective of this work was to analyze the association between agro-morphological traits of the common bean cultivar “BRS Esplendor” under organic fertilization management. The experiment was implemented in the field, in a randomized block design, with three replications, in a split plot scheme, with two types of organic compounds (grass enriched with cattle manure and bean straw enriched with cattle...
January 2021
Journal of Stored Products and Postharvest Research
Effects of harvesting date on the level of initial infestation and damages caused by insect pests on the seeds of Acacia macrostachya Reichenb. ex DC., in the district of Boulkiemde in Burkina Faso
The seeds of A. macrostachya are increasingly consumed by the Burkinabe population, especially during customary and religious ceremonies. However, these seeds are rapidly degraded after harvest by insect pests, when no control method is undertaken. This study was therefore conducted to determine the level of initial infestation and damage caused by insect pests. The harvest of dry pods on 30 trees of Saria's...
January 2021
African Journal of Biochemistry Research
Sphenostylis stenocarpa (Hochst. Ex A. Rich) and fermented Parkia biglobosa ((Jacq, R.B.R.) supplementation prevents high fat diet induced derangements in kidney of albino rats
Prevalence of obesity is on the increase globally with high fat diet (HFD) known to be the main contributing factor. This study was carried out to determine the actions of fermented Parkia biglobosa (Iru) and Sphenostyles stenocarpa (Otili) on the kidney of obese induced albino rats. The rats were grouped into a control group fed with normal rats chow and three different high fat diet groups (HFD1, HFD2, HFD3) mixed...
January 2021
African Journal of Environmental Science and Technology
Knowledge and attitude of Khat growing farmers on the safe use and handling of pesticides in Haromaya Wereda, Oromia Regional State, Eastern Ethiopia
The awareness level of the farmers growing Khat regarding the safe use of pesticide was investigated in this study at Haromaya Wereda, Eastern Ethiopia. In order to achieve the proposed objectives, structured questionnaires, oral discussions, and field observations were organized with the farmers growing Khat on the safe use of pesticide. After the study sites were selected purposively, systematic random sampling of the...
January 2021
African Journal of Environmental Science and Technology
Short-term response of flat tree oyster, Isognomon alatus to CO2 acidified seawater in laboratory and field experiments
Seawater changing chemistry has consequences on coastal ecosystems and their living resources. Future projections suggest the pH could drop ~0.2-0.3 pH units by the year 2100 under a business-as-usual (BAU) CO2 emission scenario. Marine calcifying organisms such as corals, calcifying algae, crustaceans, mussels, oysters and clams are most likely to be impacted by ocean acidification. The Isognomon alatus (flat tree...
January 2021
African Journal of Microbiology Research
Viruses, coronaviruses and COVID-19: A note for non-virology specialists
An outbreak of a respiratory disease with severe acute respiratory syndrome (SARS) – like manifestations emerged in late December 2019 in the Wuhan city of China. The causative agent of this disease was later identified to be a novel Coronavirus. Subsequently, the disease was named coronavirus disease 2019 (COVID-19) by the World Health Organisation and later declared as a pandemic. The outbreak of COVID-19 came...
January 2021
Journal of Yeast and Fungal Research
Occurrence of mycoflora, their association and production of aflatoxin B1 in groundnuts
Groundnut (Arachis hypogaea L.) is an important food crop in Africa which is a source of nutrients and income in rural areas of Zimbabwe. It is considered to be a crop highly susceptible to aflatoxin contamination. Accordingly, the objectives of this study were to understand the presence of mycoflora, their association and the level of contamination by aflatoxins of groundnut from various markets in Zimbabwe. Thirty...
January 2021
African Journal of Agricultural Research
Inorganic fertilizer use among agroforestry and non-agroforestry practicing farmers in South West Cameroon: A comparative assessment and policy ramifications
Continuous and excessive use of inorganic fertilizers by farmers across the world is causing more harm than good to croplands. This is because most of these inorganic fertilizers are toxic, which in essence defeats the very purpose for which they are produced. This paper sought to comparatively assess the use of inorganic fertilizer among agroforestry and non-agroforestry practicing farmers in south west Cameroon. Data...
January 2021
African Journal of Agricultural Research
Effect of crop canopy manipulation on light interception, growth, and development of wild proso millet and giant foxtail in row-cropping systems
Crop canopy architecture is known to affect weed performance. Field experiments were conducted to examine the effect of altered crop canopy architecture and light interception on growth and development of wild proso millet and giant foxtail, two problematic weed species. Crop canopy architecture was manipulated by planting two sweet corn varieties contrasting in canopy architecture (Bonus-has a dense leaf canopy and...
January 2021
African Journal of Agricultural Research
Assessment of fertilizers usage and cropping patterns in study area of Naypyitaw, Myanmar
A study was conducted to observe the demographic characteristics of farmers, to assess the use of fertilizers application by farmer and to identify the current status of cropping pattern in the study area. The demographic profiles of 60 respondents stated that the age ranged from 30 to 78 years and land holding ranged from 0.10 to 2.80 ha. The majority of farmers (40%) had a primary educational level. Farmers utilized...
January 2021
Journal of Parasitology and Vector Biology
Molecular basis of arrested liver stage development of the gamma irradiated Plasmodium yoelii sporozoite
Worldwide, about 270 million people are diagnosed with malaria annually and about a million deaths occur from this disease mostly in children and pregnant women in Africa. Despite enormous effort and resources directed towards malaria control and eradication, problems of resistance to chloroquine by the malaria parasite and resistance to insecticide by the mosquito vector have only contributed to worsening of the spread...
January 2021
African Journal of History and Culture
The influence of the African revolution on
African theology
The main thesis of this work is to portray Pan-Africanism as a movement that is destined to give all people of African descent a sense of identity, self-determination and liberation by supplying significant context for African theologians. Pan-Africanism, notwithstanding all its limitations, can be an effective instrument of African liberation and hence, proffers great opportunity for authentic theological enterprise....
January 2021
Journal of Languages and Culture
Elements in color: A symbolistic approach to analyzing the Haitian flag
The literature and artifacts associated with Haiti’s history have puzzled its people for a long time. One historical symbol left open to interpretation is the Haitian flag, although its aesthetic appeal is apparent to many. Ascertaining precise meanings from the flag's design is difficult due to the lack of available information and alteration of the original design by successive political administrations....
January 2021
African Journal of Biotechnology
HBc antibody seroprevalence in HBs negative antigen blood donors at the Chad National Blood Transfusion Center in N’Djamena
The aim of this study is to assess the risk of hepatitis B transfusion in negative HBsAg blood donors who test positive for anti HBcAb. From January to December 2019, an observational study of virological markers was carried out with blood donors (family and volunteers) at the National Blood Transfusion Center in N’Djamena. The donors included were also tested negative for the markers (Ab anti HCV, HIVAg/Ab and...
January 2021
Journal of Medicinal Plants Research
The study on antioxidant activity of ulvan-calcium derivative
Ulvan is a water-soluble polysaccharide that is extracted from the algae Ulva pertusa (Chlorophyta). In this study, ulvan-calcium derivative (U-calcium) was prepared and calcium content was 5.2%. Ulvan-calcium could effectively scavenge on 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2’-azino-bis (3-ethyl-benzothiazolie-6-sulfonic acid) (ABTS), hydroxyl, and superoxide radicals. The inhibition rate on superoxide...
January 2021
Journal of Medicinal Plants Research
Development and validation of a new method to quantify vitexin-2''-O-rhamnoside on Passiflora L. extracts
The genus Passiflora L. is the most representative of the Passifloraceae family and includes about 500 species. The aim of this work was to analyze three different passion fruit species in relation to vitexin-2´´-O-rhamnoside content by high-performance liquid chromatography coupled to a diode-array ultaviolet detector. Samples were prepared by water infusion (10% w/v), dried by lyophilization, and stored in...
January 2021
African Journal of Microbiology Research
Evaluation of epidemiological factors of the bacterial pharyngitis in children in Shouk Al-Kameesh, Al-Khoms, Libya
Pharyngitis is an inflammation or irritation of the pharynx or palatine tonsil. The etiology is usually viruses which cause the majority of the pharyngitis but most bacterial cases are attributed to group A Streptococci (GAS). This study aimed to identify the frequency of bacterial pharyngitis especially GAS of children, according to epidemiological factors. Symptoms present and signs for each patient were recorded,...
January 2021
Journal of Horticulture and Forestry
Ex-situ propagation by cutting of Flemingea faginea (Guill.& Perr.) (Burkina Faso, West Africa)
Medicinal plants are especially used by vulnerable populations in Burkina Faso to solve their health problems. Flemingia faginea is a medicinal plant overexploited and its wetland habitat is threatened by climate change. Thus, this study aims to promote the ex-situ reproduction of F. faginea, and make it accessible as a remedy for people suffering from blood pressure disease. The capacity of reproduction by cutting has...
January 2021
African Journal of Microbiology Research
Isolation, identification and growth conditions of calcite producing bacteria from urea-rich soil
Bacterial chemical reactions, such as urea hydrolysis can induce calcium carbonate precipitation. The induced production of calcium carbonate formed by microorganisms has been widely used in environmental and engineering applications. The present study aimed to isolate, identify and optimize growth conditions of urease positive bacteria from urea rich soil in Gaza Strip. Bacterial isolates, which tolerated ≥10% urea...
January 2021
African Journal of Biotechnology
Prospective study of dental implantology related patents in Brazil
Technological innovation and the development of new products is what currently boost the competitiveness between enterprises and moves the economy. The technical-scientific advances in Dentistry grow each day and there are great investments by research centers and universities in new materials, especially in dental implantology. The objective was to evaluate the patents deposited and granted in implantology at the...
January 2021
African Journal of Pharmacy and Pharmacology
Therapeutic potential of Annona senegalensis Pers (Annonaceae), a plant used in traditional medicine for the treatment of epilepsy in Burkina Faso
Annona senegalensis Pers. is a plant used in Burkina folkloric medicine for the treatment of epilepsy. The stem-bark, roots and leaves of A. senegalensis are used for an array of human disorders, including epilepsy. Previous studies have demonstrated some genuine effects of A. senegalensis fractions in vivo models of temporal lobe epilepsy. In the present work, we have compared the pharmacological profile of the most...
January 2021
Journal of Medicinal Plants Research
Chemical composition and antibacterial activity against Escherichia coli of extracts of a common household plant
Plants have long been a source for a wide variety of compounds with medicinal properties; of significant interest are plant antimicrobial compounds. Given the continual increase in bacterial resistance, it is imperative that new antimicrobial compounds need to be discovered. The purpose of this study was to screen some common household plants for antibacterial activity, specifically against Escherichia coli. Leaves of...
January 2021
African Journal of Mathematics and Computer Science Research
One kind of construction on sunflower with two petals*
A sunflower (or ∆-system) with k petals and a core Y is a collection of sets S1,⋯, Sk such that Si∩Sj=Y for all i≠j; the sets S1\Y,⋯, Sk\ Y, are petals. In this paper, we first give a sufficient condition for the existence of a sunflower with 2 petals. Let F={A,B,C} be a family of subsets of a set { a1,⋯,am , b1,⋯,bn , c1,⋯,cn } with and A={a1,⋯,am}, B={ b1,⋯,bn } and C={ c1,⋯,cn } are non-increasing lists...
January 2021
Journal of Public Health and Epidemiology
Traditional inoculation practices that led to the development of modern vaccination Techniques: A review
Most developments in biotechnology during the last few decades focused on the potential applications of human health, vaccination being the most prominent invention to date. Disease prevention is the most convenient and highly effective approach to promoting human health and prolonging life. Vaccinations have prevented millions of deaths worldwide every year and diseases that used to kill, disable or debilitate millions...
January 2021
International Journal of Livestock Production
Performance and welfare of dairy cattle in an alternative compost bedded pack housing in a pasture-based system
The objective of this study was to assess the performance and welfare (lameness, hock lesions, mastitis) of loose-housed dairy cattle managed under grazing or semi-grazing system. Data of thirty-two cows before and after changing to semi-grazing system during the rainy season (week 1 to 4; grazing, week 6 to 9; semi-grazing) and before and after changing to semi-grazing (week 11 to 16; grazing, week 18 to 23,...
January 2021
African Journal of Pharmacy and Pharmacology
Reflection on medicinal plants, especially antivirals and how to reconsider ethnobotany as an interesting way for health preservation
The medicinal plants, which are at the origin of the medical sciences, are gradually passing from the apothecary vials, from the handmade bags of the tradipraticians to the laboratories to provide countless new medicines synthesis models. Today, chemical drugs have replaced most herbal drugs in pharmacies. Empirical knowledge has been neglected as chemistry progressed. Yet 80% of the world’s population is still...
January 2021
African Journal of Biotechnology
Biotreatment of water samples from Itakpe iron mining site, Kogi State, Nigeria using Bacillus species
Four soil samples and water effluents each within the mining environment were tested in this study. Twenty six bacteria were isolated using nutrient agar and acidified nutrient agar. Gram staining and endospore staining were carried out to determine the Bacillus species used for bioremediation. Speciation of the microorganisms using 16S rRNA sequencing showed the organisms to be Bacillus cereus NK1, Lysinibacillus...
January 2021
African Journal of Business Management
Transparency and public procurement practices in the Nigerian Civil Service
This study examines the extent to which the level of transparency influences public procurement practices in the Nigerian Civil Service. A survey research design is adopted. The staff members of the public procurement department/unit of the different federal government ministries in Abuja made up the population of this study. The sample size consists of 352 staff members selected from different ministries where...
January 2021
African Journal of Plant Science
Natural rubber (Hevea brasiliensis Müell.-Arg.) production, processing, and rubber wastes utilization: Challenges and prospects for economic diversification and sustainable development of Nigeria
Over 80% of Nigeria’s foreign exchange earnings come from the sales of crude petroleum. Nigeria has a landmass of 910,768 km2 with 38.97% arable, while 3.46% is suitable for the cultivation of permanent cash crops such as rubber, cocoa and palm trees. High-latex yields (3,000-3,500 kg dry natural rubber (NR)/ha/year) of Nigeria’s hybrid rubber seedlings is a preferred choice to most foreign species...
January 2021
Journal of Accounting and Taxation
Closed form solution for the valuation of deferred tax assets
Deferred tax asset (DTA) is a tax/accounting concept that refers to an asset that may be used to reduce future tax liabilities of the holder. In the banking sector, it usually refers to situations where a bank has either overpaid taxes, paid taxes in advance or has carry-over of losses (the latter being the most common situation). In fact, accounting and tax losses may be used to shield future profits from taxation,...
January 2021
African Journal of Plant Science
Variation of Parkia biglobosa morphological traits according to land use and agro-climatic zones in Southern Mali
A study was conducted in southern Mali to contribute to the domestication of Parkia biglobosa. Three agro climatic zones (North Sudanian “NS”, South Sudanian “SS” and North Guinean “NG”) and two stands (field and fallow) were concerned. Three plots of 0.25 ha each, were installed in each stand. Diameter at Breast Height (DBH), Total Height (TH) and Crown Diameter (CD) of adult trees...
January 2021
African Journal of Plant Science
Genetic characterization of Cape gooseberry (Physalis peruviana L.) accessions in selected counties in Kenya using SSR markers
Cape gooseberry (Physalis peruviana L.) is a neglected high potential crop, knowledge of the genetic diversity of the genotypes domesticated in Kenya is limited. To understand the genetic diversity and structure within and between Cape gooseberry germplasm, 70 accessions from six selected counties were analyzed using 15 pairs of highly polymorphic SSR primers. In this study, a total of 61 polymorphic SSR alleles were...
December 2020
Educational Research and Reviews
The degree of using meta-cognitive thinking strategies skills for problem solving by a sample of biology female teachers at the secondary stage in the State of Kuwait
The study aims to identify the degree of using meta-cognitive thinking strategy skill that relates to problem solving by teachers in the State of Kuwait and to investigate whether there is a statistical significance of using the skills of meta-cognitive strategies on solving problem related to their years of experience and their educational area. The current study followed the descriptive and analytical method that is...
December 2020
African Journal of Agricultural Research
Farmers’ preferences towards breeding objective for indigenous chickens in different agro-ecologies of Ethiopia
A study was conducted in different agro-ecologies of Ethiopia with the objective of understanding the farmers’ preferences towards breeding objectives in indigenous chickens. For the interview, 245 households (60 from lowland, 100 from midland and 85 from highland) were randomly selected. Farmers in lowland had significantly (p<0.05) lower chicken populations while comparing with the remaining agro-ecologies....
December 2020
African Journal of Medical and Health Sciences
Uptake and reason for discontinuation of long-acting reversible contraception in a tertiary hospital: A 5 years retrospective review
Long-acting reversible contraception (LARC) methods, including intrauterine contraceptives and subdermal implants, are some of the most effective contraceptive methods available. They are known to be convenience, cost effective and suitable for many women. The study aims to determine the trends and uptake of long acting reversible contraception in University of Maiduguri Teaching Hospital, Maiduguri, assess the...
December 2020
African Journal of Medical and Health Sciences
Evaluating the effect of highly active antiretroviral therapy on visual acuity and intraocular pressure among HIV/AIDS patients in Kano State, Nigeria
Highly Active Anti-Retroviral Therapy (HAART) has been effective in reducing rapidly progressive retinopathies, there are other ocular manifestations of HIV and ocular side effects of HAART which are yet to be determined and evaluated. The aim of this study was to investigate and evaluate the effect of HAART on Visual Acuity (VA) and Intraocular Pressure (IOP) among HIV/AIDS patients in Kano State, Nigeria. This was a...
December 2020
African Journal of Medical and Health Sciences
Quality of health care service assessment using Donabedian model in East Gojjam Zone, Northwest Ethiopia, 2018
Donabedian model health care quality assessment measures the difference between expected and actual performance to identify gaps in the health care system, which would serve as a starting point for quality improvement activities. So, the aim of this study was to assess the level of quality of health care with respect to structural settings, actual process of care, and outcomes of care. Institutional based both...
December 2020
African Journal of Agricultural Research
Effects of two growth hormones and three manure formulas on a variety of papaya (Carica papaya L.) in the Sudano-Sahelian zone of Mali
This study was conducted in the orchard of the Rural Polytechnic Institute for Training and Applied Research (IPR / IFRA) in Katibougou to assess the growth and production of solo papaya (Carica papaya L., 2n = 18) in Sudano-Sahelian zone of Mali as well as the effects of the hormone and manuring formulas. A split plot device, comprising 2 factors with 3 levels of variation each, was used. The main factor was the...
December 2020
African Journal of Agricultural Research
Estimation of magnitudes of heterosis for grain yield and yield contributing traits of conventional maize (Zea mays L.) single cross hybrids
This study was initiated with the objective of estimating magnitude of heterosis of selected conventional maize inbred lines. Ten elite inbred lines were selected based on over per se performances. The crosses were done in a 10 x 10 half-diallel mating design to produce 45 F1 single crosses hybrids during 2016. The experiment was conducted at Bako National Maize Research Center in 2017 main cropping. The experimental...
December 2020
African Journal of Business Management
The social side of IPOs: Twitter sentiment and investors’ attention in the IPO primary market
Despite in recent years the impact of market sentiment on the performance of listing firms has gained increased attention from academics and professionals, a research question that remains uncovered deals with how the retail investor sentiment and attention might impact the IPO pricing in the primary market. This analysis proposes a stochastic frontier model approach on a sample of 412 US firms listed between 2010 and...
December 2020
African Journal of Agricultural Research
Limestone application effects on common bean (Phaseolus vulgaris L.) yield and grain iron and zinc concentration on a Ferralsol soil in Uganda
Soil acidification has major ramifications on crop production because low pH soils are less productive. The objective of this study was to determine the effect of limestone application on yield and grain iron (Fe) and zinc (Zn) concentration in newly released high iron and zinc, drought resilient varieties of common bean (NAROBEAN 1 and 3). Using a split-plot in time design, an experiment was set up using three common...
December 2020
African Journal of Agricultural Research
Use of unmanned aerial vehicles (UAV) as an innovation in agriculture
Facing up with the effects of climate change, increasing human population, reduction of natural resources, and degradation of soils the agricultural sector has the challenge of meeting the world's demand for food. In this scenario, the interest of scientific communities for the use of Unmanned Aerial Vehicles (UAV) in the agricultural sector has increased in recent years. The aim of this article is to provide a...
Page 2 of 1206, showing 50 records out of 60296 total, starting on record 51, ending on 100
