Articles
Page 2 of 1260, showing 50 records out of 62993 total, starting on record 51, ending on 100
September 2023
African Journal of Business Management
The corporate governance of venture capital-funded startups in Africa
The number of venture-funded technology startups in Africa and the amount of venture capital investment has been on a steady rise in the recent past. We are now at a point in the evolution of the various startup ecosystems around the continent where we have had startups going through multiple rounds of venture funding, some increasing their valuations to unicorn status (that is, being valued at over $1 billion). Others...
September 2023
Scientific Research and Essays
Comparative study of water quality between upstream and downstream of Thamirabarani River using multivariate statistical tools
The present investigations were focused on the systematic analysis of surface water quality of the Thamirabarani River from upstream (Pechiparai dam to Gnaramvilai) to downstream (Vettuvenni to Thengaipattinam estuary) during the period from September 2020 to January 2021. The different hydrochemical parameters such as temperature, pH, EC, TDS, fluoride, turbidity, nitrate, phosphate, sulphate, chloride, calcium,...
September 2023
African Journal of Microbiology Research
Density and diversity of arbuscular mycorrhizal fungi in Anacardium occidentale L. plantations in Senegal
Cashew nut cultivation plays an important socio-economic role in Senegal. However, it suffers from several problems, including declining soil fertility which leads to low productivity. To overcome these constraints, the use of arbuscular mycorrhizal fungi (AMF) could be a sustainable alternative. However, the positive effects of AMFs may depend on their infectious potential, density, and diversity. So far, little...
September 2023
Scientific Research and Essays
Diurnal variability of the magnetospheric convective electric field (MCEF) from 1996 to 2019: Comparative investigation into the signatures of the geoeffectiveness of coronal mass ejections and magnetic clouds
This paper compared the signatures of shock activity and magnetic clouds (caused by geoeffective interplanetary coronal mass ejections (ICMEs)) on the diurnal variability of the magnetospheric convective electric field (MCEF) from 1996 to 2019. The investigation is done as a function of the orientation of the interplanetary magnetic field (IMF). The temporal variabilities of the MCEF of the two geomagnetic activities...
September 2023
International Journal of Water Resources and Environmental Engineering
Analysing rainfall and runoff patterns over the Niger River in Mali, West Africa
The Niger River plays an important role for all riparian countries, especially Mali because many irrigated areas use this resource for their daily activities. Climate change, leading to a reduction in rainfall, may have a negative impact on the Niger River. Therefore, it is useful for researchers to study this natural resource to address climate risks. The main goal of this current study is to characterize the river...
September 2023
African Journal of Agricultural Research
Effect of paddy sourcing methods on the volume of rice milled by small and medium-scale rice millers in Mwea, Kirinyaga County, Kenya
The purpose of the study was to determine the effect of paddy sourcing methods on the volume of rice milled by small and medium-scale rice millers in Mwea, Kirinyaga County, Kenya. Data were collected using semi-structured questionnaires from 90 small-scale millers and 70 medium-scale millers amounting to a total of 160 rice millers. The results from a Multinomial Endogenous Switching Regression (MESR) show that direct...
September 2023
International Journal of Livestock Production
Entomological inventory of bovine trypanosome vectors in the locality of Logone Birni, Far North Cameroon
In order to identify the vectors of bovine trypanosomiasis in the locality of Logone Birni, inventories were carried out from March to June 2020 in six sites. The purpose of this work is to contribute to the evaluation of the seroprevalence of bovine trypanosomiasis, to identify trypanosome vectors and to inventory the vector control methods already implemented in this area. Forty cattle were sampled for...
September 2023
Journal of Veterinary Medicine and Animal Health
Presence of Mycobacterium avium subspecies paratuberculosis, in goat’s milk, natural rennet and fresh cheese from San Luis Potosi, Mexico
Mycobacterium avium subspecies paratuberculosis (Map) is the etiological agent of paratuberculosis, which is one of the chronic diseases that cause financial losses in livestock production. Map can be present in cheese and other dairy products, especially those made with unpasteurized milk. Contamination of the food supply chain exposes humans to the bacteria, making the disease an important zoonosis of public health...
September 2023
African Journal of Pharmacy and Pharmacology
Hydrocotyle bonariensis Comm ex Lamm (Araliaceae) leaves effects on rabbit’s blood pressure and electrocardiogram
Hydrocotyle bonariensis Comm ex Lamm (Araliaceae) is traditionally used to treat various pathologies like hypertension. This work aims to evaluate the impact of hydro-ethanolic extract of its leaves on the blood pressure and cardiac activity of rabbits, and then to compare its hypotensive effect to conventional hypotensives. Intravenous injection of the hydro-ethanolic leaf extract (10; 20; 40; 80 and 160 mg /kg body...
September 2023
Botswana Journal of Economics
Export diversification and economic growth: Evidence from Zimbabwe
This paper employed the Auto-Regressive Distributed Lag (ARDL) model to examine the effects of export diversification on economic growth using Zimbabwe’s annual time series data for the period 1995 to 2020. The Herfindahl index (HI) was used as a measure of export diversification. The control variables included are; capital, labour, direct investment, GDP per capita, the number of export products and secondary...
August 2023
Educational Research and Reviews
Development in technical and vocational education and training: Synopsis and implications of education policies for right skills in Kenya
This article presents implications of education and training policies on Technical and Vocational Education and Training (TVET) from the pre-colonial Kenya to date based on systematic review of education policies and related literature. In the pre-colonial period the non-formal and informal vocational training was demand driven, relevant and flexible. Throughout the colonial period, the Kenyan natives developed negative...
August 2023
Educational Research and Reviews
Gender Parity Approaches in Uganda’s Education System: A Case of Public Secondary Schools in Bugiri District
The study examined the available approaches to improving gender parity in public secondary schools in Bugiri District. It specifically focused on the approaches put in place to improve gender parities in Public secondary schools, their effectiveness and challenges faced by stakeholder. The study was rooted in the interpretive paradigm and employed a qualitative methodology. Data were obtained from head teachers,...
August 2023
Educational Research and Reviews
A study on the relationship between teacher competency and job performance under human resource management in higher education
This study aimed to investigate the effects of Jiangsu University teachers’ competency and engagement on their job performance and determine whether teacher competency affects job performance through the mediating role of engagement. We constructed a theoretical model based on self-determination theory (SDT) and the job demand–resource model and validated it using structural equation modeling (SEM). The...
August 2023
Educational Research and Reviews
A study on the competency of physical education teachers at the basic education level in China
The aim of this study was to investigate the competency of physical education teachers at the basic education level in China. The study was conducted using a qualitative approach, using purposive sampling to conduct in-depth interviews with 12 physical education teachers from schools at the basic education level in China using the behavioral event interview method and extracting themes using coding techniques with the...
August 2023
African Journal of Food Science
Consumption of discretionary salt and bouillon in Senegalese households and related knowledge, attitudes and practices
Excessive salt intake is associated with high blood pressure, a major risk factor of cardiovascular diseases. The World Health Organization has set a target of 30% reduction in population salt intake by 2020 to contain the prevalence of high blood pressure (HBP). The aim of the study was to measure the consumption of discretionary salt and bouillon in rural and urban Senegalese households. A cross-sectional descriptive...
August 2023
African Journal of Biotechnology
Current status of molecular tools development for cowpea [Vigna unguiculata (L.) Walp.] improvement
Cowpea [Vigna unguiculata (L.) Walp.] is a popular tropical grain legume which is widely produced and consumed in sub-Saharan Africa (SSA). The grains are rich in dietary protein for human while the haulm is high quality fodder for livestock particularly ruminants. Compared with many other crops cowpea is a laggard in development, evaluation and deployment of different molecular markers for use in genetics and breeding....
August 2023
African Journal of Food Science
Physicochemical and nutritional characteristics of bee pollen from Burkina Faso
This prospective study consisted in determining the physico-chemical and nutritional composition of the pollen produced in different localities of Burkina Faso. The main constituents were determined by standard methods. The results show a mass proportion (g/100 g) of dry matter between 17.15 ± 3.69 to 34.65 ± 5.05 for proteins, 43.93 ± 2.05 to 59.11 ± 5, 05 for carbohydrates, 5.29 ±...
August 2023
African Journal of Pharmacy and Pharmacology
Microbial and physical evaluation of selected cough syrups sold at peripheral drug outlets in Bushenyi District, South Western Uganda
Syrups, being non-sterile liquid pharmaceutical formulations, are prone to microbial contamination. The most common microbial contaminants are bacteria and fungi. Contamination of oral liquid pharmaceuticals makes them hazardous due to potential to cause infections, and may also change their physical, chemical, and organoleptic properties. This study assessed the microbial quality and physical characteristic parameters...
August 2023
African Journal of Pharmacy and Pharmacology
Attitudes towards vaccines and intentions to vaccinate against COVID-19 among undergraduate students at the University of Zambia
Negative attitudes regarding vaccines and unwillingness to accept vaccinations are major barriers to managing the COVID-19 pandemic. Therefore, this study assessed the attitudes towards vaccines and intentions to vaccinate against COVID-19 among undergraduate students at the University of Zambia. This cross-sectional study was conducted among undergraduate students from August to September 2021. Data were collected...
August 2023
African Journal of Biotechnology
Antioxidant activities and GC-MS profiling of fractions of methanol extract of Andrographis paniculata
This study was intended to investigate the antioxidant activities of different solvent fractions (hexane (HEX), chloroform (CHL), ethylacetate (ETHYL) and methanol (MET) fractions) of methanol extract of Andrographis paniculata and GC-MS profiling of the most active fraction (MET). The crude methanol extract was fractionated using vacuum liquid chromatography method. Antioxidant activity was evaluated using total...
August 2023
African Journal of Environmental Science and Technology
Tree diversity and carbon stock in urban area of Senegal and their implications to human health and well-being
Urban green spaces (UGSs) have become essential to meet environmental requirements and improve the quality of life of inhabitants thanks to their role on air pollution, heat islands and climate change. The aim of this study was to characterize the biological diversity of UGSs in the commune of Fann Point E Amitié and their importance for human health. A floristic inventory was carried out to assess tree diversity...
August 2023
African Journal of Microbiology Research
Phytochemical screening and antifungal activity of Cassia alata (Linn.) crude leaf extracts
The antimycotic effect of Casia alata (Linn.) commonly used for the treatment of skin diseases by local people in Nigeria was evaluated against dermatophytes (Trichophyton tonsurans, Trichophyton rubrum, Trichophyton mentagrophytes, Microsporum audouinii, Microsporum canis, Microsporum gypseum, Epidermophyton floccosum). Ten-fold serially diluted extract concentrations were subjected to phytochemical screening and the...
August 2023
African Annals of Thoracic and Cardiovascular Surgery
Takayasu disease revealed by aortic insufficiency associated with an aneurysm of the ascending aorta
Takayasu's disease is a rare inflammatory disease of unknown etiology that affects the large vessels, particularly the aorta and its major branches. A case of 29-year-old patient received for surgical management of severe aortic insufficiency was reported. Preoperative clinical and paraclinical investigations revealed a dilatation of the ascending aorta associated with a stenosis of the left subclavian artery and an...
August 2023
African Journal of Medical and Health Sciences
Community health financing and healthcare demand solvability of workers in the informal sector in Cameroon
One of the big challenges facing the Government of Cameroon is how to finance and provide healthcare access to more than 79% workers in agriculture and the informal sector. This study intends to analyze the contribution of community health financing to the demand solvability of the worker’s healthcare in the informal sector in Cameroon. Using the logistic regression model of use of health care services, which is...
August 2023
African Journal of Microbiology Research
Beneficial microorganisms as affecting root development of upland rice
Multifunctional microorganisms can significantly affect root and shoot development of upland rice seedling that could provide an increase in the crop grain yield. The objective of this study was to determine the effect of single and combined microorganism on the root and shoot development of upland rice seedlings. The experiment was arranged in a completely randomized design with treatments consisting of the upland rice...
August 2023
African Journal of Agricultural Research
Maize phenology as an indicator of climate change simulated by RegCM4 under RCP4.5 and RCP8.5 in Mozambique
The IPCC fifth assessment report indicates an increase in air temperature under future scenarios over Mozambique. It may affect the development cycle and length of phenological stages of maize, and compromise the agricultural activity in Mozambique. The goal is to quantify the response of maize phenology to referred projected changes in climate, especially highlighting changes in air temperature patterns over...
August 2023
African Journal of Agricultural Research
Comparison of the effectiveness of heterotic grouping methods in classifying intermediate maturing maize (Zea mays L.) inbred lines under stressful and non-stressful environments
The effectiveness of a hybrid breeding program depends on the heterotic patterns that can be used to utilize grain-yield heterosis. This study was carried out to (a) categorize inbred lines into heterotic groups using three different methods and (b) determine the most effective heterotic grouping method for categorizing set of inbred lines. A total of 96 hybrids generated from thirty-two set of inbred lines...
August 2023
African Journal of Biotechnology
Genome-wide association analysis identifies resistance loci for bacterial blight in diverse East African rice germplasm
Xanthomonas oryzae pv. oryzae (Xoo), the causal agent of rice bacterial blight disease has been extensively characterized, and loci against different races identified. Many rice cultivars have been developed and utilized to combat the disease, however, due to the rapid evolution of Xoo, several resistances have broken down. The continuous challenge of ever-evolving Xoo and the breakdown of resistance in cultivated rice...
August 2023
African Journal of Biotechnology
Expression of bioactive compounds in different pepper cultivars (Capsicum annuum L.) in response to different fertilizer treatments
This research aimed at evaluating four cultivars of Capsicum annuum L. with different nutrient sources to ascertain the nutrient source that would improve the soil characteristic and promote the accumulation of carotenoids and flavonoids in peppers. Four nutrient sources: poultry manure, pig manure, goat manure, and nitrogen: phosphorus: potassium (NPK) were used for the study. The experiment was conducted as a 4...
August 2023
Journal of Geology and Mining Research
Identification of iron ores in Sierra Leone, Africa by using remote sensing techniques
Remote sensing is used in this work as a geological reconnaissance technique, demonstrating that it is profitable and effective in providing valuable information for distant regions of mining interest. Due to the Civil War that affected Sierra Leone from 1991 to 2002, Sierra Leone's mining resurgence has focused only on restoring closed mines and the exploitation of previously proven reserves. Thus, the main...
August 2023
African Journal of Environmental Science and Technology
An exploratory study of the impact of commingled biochar on removal of total petroleum hydrocarbon (TPH) from crude oil polluted soil
An experimental scrutinization of bioremediation of crude oil polluted soil using furnace pyrolyzed comingled-biochar containing poultry litter, pine wood and rice straw char made at different proportions was carried out in the present study. The experiment was performed in five stages which include soil investigation, biochar production, characterization, and total petroleum hydrocarbon (TPH) remediation via green...
August 2023
Journal of Public Health and Epidemiology
Perceived quality of healthcare provided by patent medicine vendors in rural and remote communities of low- and medium-Income countries (LMICs): A perspective from Nigeria
Perceived quality of healthcare is a strong predictor of continuous utilization of healthcare. There is dearth of current evidence on the perception of the quality of the healthcare received from patent medicine vendors (PMVs) in low- and medium-income countries (LMICs). This study, therefore, through the lens of hard-to-reach communities in Nigeria seeks to assess the perception of the quality of healthcare provided by...
August 2023
Journal of Veterinary Medicine and Animal Health
Prevalence, risk factors, and molecular identity of Giardia infections in dogs in Nairobi County, Kenya
Giardia duodenalis is an emerging zoonotic protozoan parasite that is significantly affecting the health and welfare of dogs in Nairobi County, Kenya. There is limited data on canine giardiasis in Kenya. A cross-sectional study was conducted to determine the prevalence, risk factors and molecular identity of G. duodenalis infections in dogs in Nairobi County, Kenya. Four hundred fecal samples were collected from...
August 2023
African Journal of Microbiology Research
Morphological, pathogenic and molecular characterization of fungal species associated with mango fruits in Mexico
The characterisation of the causal agents of postharvest diseases, as well as their pathogenicity in different mango cultivars of economic importance in Mexico was evaluated. In total, 37 fungi were isolated from diseased mango (Mangifera indica L.) of the cvs Ataulfo, Hayden, Manila, Peach, Haden and creole. For the morphological characterization, the isolates were seeded in potato dextrose agar media and described by...
August 2023
African Journal of Biotechnology
Contact activities of Piper guineense (Schum and Thonn) and Eugenia aromaticum (L). (Merril and Perryl) extracts against larvae of hide beetles, Dermestes maculatus (Degger) (Coleoptera: Dermestidae)
Contact activities of Piper guineense (Schum and Thonn) and Eugenia aromaticum (L). (Merril and Perryl) extracts in the control of Dermestes maculatus larvae infesting stored fish (Clarias gariepinus) were investigated under laboratory condition (28±3°C and 65±5% RH). The extracts were tested by application of 2.0 µL each to ten third instars larvae using micro pipette at a concentration of 6.00,...
August 2023
African Journal of Agricultural Research
Heterosis, combining ability and reaction of tomato parental lines and their F1 hybrids to bacterial wilt caused by Ralstonia solanacearum in Kenya
Strategies to manage bacterial wilt disease causing 64-100% yield loss have limited effectiveness. A 10×10 diallel mating design excluding reciprocals and self was employed in this study to evaluate combing ability effects, heterosis, and reaction to bacterial wilt in 10 tomato parents. Genotypes AVTO1424 (11.87%), AVTO1429 (12.29%) and AVTO1314 (13.53%) were found to have significantly lower disease incidence,...
August 2023
International Journal of Nursing and Midwifery
Development of a health behavior model for females with a history of gestational diabetes to promote healthy dietary habits and glucose tolerance testing
This study aims to develop a health behavior model for females with a history of gestational diabetes mellitus (GDM) to promote healthy dietary habits and glucose tolerance testing by identifying factors affecting the health behaviors of this population based on the framework of the Theory of Planned Behavior. A questionnaire survey was administered to females with a history of GDM who were raising infants, and 58...
August 2023
Journal of Medicinal Plants Research
Chemical characterization of bottlebrush leaves found in NISLT premises, Samonda, Ibadan, Nigeria.
This study investigated the chemical composition of Bottlebrush leaves for its ascribed mythical medicinal uses. Bottlebrush leaves were collected from the Nigerian institute of science laboratory technology premises in Ibadan, Nigeria. Proximate analyses, phytochemical screening, elemental analysis and antioxidant analysis were carried out on the leaves extract. This study has provided a scientific justification that...
August 2023
African Journal of Environmental Science and Technology
Effect of acid pre-treatment and two-stage oxygen-assisted fermentation on the production of vinegar from lignocellulose biomass peel of pineapple
The valorization of lignocellulosic waste stands as a promising avenue to bolster sustainable food production and consumption within a circular economy framework. This study centered on the production of vinegar from pineapple peels through a two-stage fermentation process aided by oxygen. The pineapple peels underwent sorting, washing, drying, and subsequent grinding into a powder. This powder was subjected to...
August 2023
Journal of Engineering and Computer Innovations
LoRa flood messaging applied to remote soil-moisture monitoring
Soil-Moisture sensing has proven to be an important factor in decreasing the need for irrigation while maintaining crop yield and quality. Farmers’ finding ways to minimize water use is necessary given the world’s obvious climate change and, in some areas, the resulting onslaught of drought. As the world’s population grows and the demand for higher-quality food increases, precision irrigation becomes...
August 2023
African Journal of Food Science
Feeding practices and nutrition status of children aged 0-59 months from Njombe and Geita, Tanzania
This study aimed to assess infant and young child feeding (IYCF) practices, child nutrition status, and their variations within ethnic groups in regions with high prevalence rates of stunting. A cross-sectional study was conducted on a sample of 150 mother-child pairs that were randomly selected within regions of high stunting rates (Njombe and Geita) in Tanzania. Socio-demographic, IYCF practices, and anthropometric...
August 2023
African Journal of Agricultural Research
Role of income from rice cultivation on livelihoods of rice farmers: Evidence from Ahero Region, Kenya
In Africa, the demand for rice has increased rapidly as urbanization progresses and assistance is being provided to improve productivity and rice farming management. In the rice-cultivation area near Lake Victoria in western Kenya, where farmers are called “outgrowers”, wage labor costs put pressure on rice farming and reduce profits. However, wage laborers were rice farmers living in the same area. The...
August 2023
African Journal of Agricultural Research
Environmental effects on sugarcane growth from on-farm data in the Brazilian Midwest
Climate and soil water availability are factors that influence the growth and yield of sugarcane. These factors can also serve as valuable indicators for predicting maturity and biometric changes in sugarcane, and also enhanced productivity. The aim of this study was to determine the biometric and sucrose accumulation responses of surgarcane as a function of agrometeorological data and soil water storage. The study was...
August 2023
African Annals of Thoracic and Cardiovascular Surgery
Surgical repair of a giant right coronary artery aneurysm with intra-cardiac fistulas: A case report
Coronary artery aneurysms (CAA) are rare and life-threatening cardiovascular abnormalities. Multiple aneurysms and giant aneurysms are even rarer. The authors report a case of a giant CAA (7 cm) in a 62-year-old male patient with multiple cardiovascular risks. In fact, there were three adjacent aneurysms of the right coronary artery (RCA) that were connected to the cardiac chambers through two fistulas. Additionally,...
August 2023
International Journal of Fisheries and Aquaculture
Comparative study of growth rates, condition factors and natural mortality of Oreochromis niloticus fish from culture fisheries and capture fisheries at Lake Kariba, Zambia
Oreochromis niloticus were sampled from culture fisheries (Yalelo, Fwanyanga and Choombwe) (n = 211) in April and May, 2020. Capture fisheries (Siavonga and Sinazongwe) (n = 198) were sampled between April and November, 2020. The research was aimed to study the population parameters (growth rates, condition factors and natural mortality) of O. niloticus at Lake Kariba. The results showed that fish at culture fisheries...
August 2023
African Journal of Pure and Applied Chemistry
Major anthocyanin quantification, free radical scavenging properties and structural identification in Cymbopogon giganteus extracts
Anthocyanin-based colorants are highly appreciated by the food industry for their lower toxicity. However, in Burkina Faso, very little scientific information is available on potential sources of anthocyanins, despite significant progress in plant studies. This scientific report is the first to focus on anthocyanins of Cymbopogon giganteus from Burkina Faso and aims to valorize them for their use as an alternative to...
August 2023
Journal of Public Health and Epidemiology
Knowledge and practice of road safety regulation by commercial motorbike riders in Douala-Cameroon
To assess the knowledge and practice of commercial motorbike riders on road safety regulation and capture their challenges towards its implementation. This was a qualitative study with a narrative design and focus group discussion (FGD) and in-depth interview (IDI) as data collection methods. Two focus group discussions (n=22) were held constituting of commercial motorbike riders who had been purposefully recruited and...
August 2023
Journal of Medical Laboratory and Diagnosis
Risk factors for metabolic syndrome in adult patients with sickle cell anemia in Jazan region, Kingdom of Saudi Arabia
Hematological anemia is a characteristic of the hereditary condition known as sickle cell disease. According to several studies, adults with sickle cell disease may exhibit metabolic syndrome symptoms such as hyperglycemia, hypertension, and dyslipidemia. This study's objective was intended to assess the steady-state risk variables for the metabolic syndrome in adults with sickle cell anemia in the Jazan region. A...
August 2023
African Journal of Business Management
Influencing factors for platform firm’s price strategy: Take the bankcard platform as examples in China
Taking the Bankcard platforms of 14 Chinese commercial banks from 2001 to 2022 as examples, we have developed an influencing factors model for the price strategy of platform enterprises. The results indicate that the cross-network external strength and unit switching cost of the platform enterprise do not have a significant effect on pricing from the consumer side. However, the endogenous value and unit cost of...
August 2023
African Journal of Agricultural Research
Genetic diversity of Cleome gynandra germplasm in Burkina Faso using SSRs molecular markers
Cleome gynandra L. is an important traditional leafy vegetable in Burkina Faso diets. Because of its high nutritional value, it makes a good dietary supplement, providing an important nutritional and medicinal requirement. The aim of the present study was to assess the genetic diversity and intra- and interpopulation relationships of the C. gynandra collection using SSR molecular markers specific to C. gynandra. Nine...
Page 2 of 1260, showing 50 records out of 62993 total, starting on record 51, ending on 100
