检索结果-南通市图书馆

Rainfall and Temperature Variations over Burkina Faso: Possible Influence of Geomagnetic Activity, Solar Activity and Associated Energies from 1975 to 2020

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Atmospheric and Climate Sciences 2022年第4期12卷 603-612页

作者： yacouba sawadogo Somaïla Koala Jean Louis Zerbo Laboratoire de Matériaux d’Héliophysique et Environnement (La.M.H.E) Université Nazi Boni Bobo-Dioulasso Burkina Faso Unité de Formation et de Recherche en Sciences Exactes et Appliquées (UFR/SEA) Université Nazi Boni Bobo-Dioulasso Burkina Faso

This study investigates climatic parameters (rainfall, and temperature) over Burkina Faso and the possible role of solar activity and its induced energies. Through morphological investigations, we analyzed solar activity indices (sunspot number, IMF, PC index, Cosmic rays) over the last three solar cycles (1975-2020). Results about interplanetary heating show that joule heating is well correlated with the dynamic pressure of the solar plasma. Climate parameters (rainfall, Temperature) variabilities are modulated by disturbances in solar activity: 1) quiet solar characterized by a drop in solar plasma’s parameters is associated with important cloud cover and consequently bring important rainfall which chills terrestrial atmosphere, 2) active solar characterized by important input energy is associated with weak incident cosmic ray consequently with low cloudiness which brings warming. Thus, the possible natural link can be suggested between solar activity and climatic parameters even if it is not the only factor of global warming.

关键词： Temperature Rainfall Solar Activity Geomagnetic Activity Climate Burkina Faso

Total Electron Content Diurnal and Seasonal Variations and Response to Solar Events at Koudougou Station in Burkina Faso

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Geosciences 2023年第9期14卷 827-839页

作者： yacouba sawadogo M’Bi Kaboré Somaïla Koala Arouna Mandé Jean Louis Zerbo Laboratoire de Matériaux d’Héliophysique et Environnement (La.M.H.E) Université Nazi BONI Bobo-Dioulasso Burkina Faso

In this paper, we studied the seasonal behavior of the total electron content (TEC) during a part of solar cycle 24 ascending, maximum and decreasing phases at Koudougou station (Latitude: 12°15'09"N Longitude: 2°21'45"W). Response of TEC to solar recurrent events is presented. The highest values of the TEC in 2014, 2015 and 2016 were recorded on March and October, while in 2013 they were recorded on April and November, corresponding to equinox months. This observation shows that TEC values at the equinoxes are higher than those of solstices. Moreover, the monthly TEC varies in phase with the sunspots number showing a linear dependence of the TEC on solar activity. The ionospheric electron contents are generally very low both before noon and during the night, but quite high at noon and after noon. This pattern of TEC variation is due to the fluctuation of incident solar radiation on the Earth’s equatorial ionosphere. During quiet periods, the number of free electrons generated is lower than that generated during recurrent periods, which shows a positive contribution of recurrent activity to the level of the TEC. Investigations have also highlighted a winter anomaly and equinoctial asymmetry in TEC behavior at Koudougou station.

关键词： Total Electron Content (TEC) Recurrent Activity Quiet Activity Seasonal Variation

Distributions and Structure of the Solar Wind during Solar Cycles 23 and 24

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Geosciences 2023年第9期14卷 813-826页

作者： Somaïla Koala Wendkouni Paulin Bere yacouba sawadogo Issamaïl Ki Jean Louis Zerbo Laboratoire de Matériaux d’Héliophysique et Environnement (La.M.H.E) Université Nazi BONI Bobo-Dioulasso Burkina Faso

To observe the level of interaction between the solar wind and the geomagnetic activity, we analyzed the distribution of the solar wind speeds according to the different classes of geomagnetic activity and the different phases of solar activity. We found that, the magnetic quiet activity reccord 80% of the solar wind speeds V s observed 88% of solar wind speeds V > 450 km/s. The shock activity observes 82% of the solar wind speeds V > 450 km/s. About 70% of the solar wind speeds V > 450 km/s, are observed in the corotating activity class. The cloud shock activity and fluctuating activity classes observed respectively 37% and 55% of the wind speeds V > 450 km/s. Furthermore, slow solar winds are mainly observed at the minimum phase of each solar cycle;but exceptionally the solar maximum phase of solar cycle 24, records a significant rate of slow solar wind. Shock winds are mainly observed around the solar maximum and recurrent winds are mainly observed at the descending phase of the solar cycle. Corotating stable winds and moderate shock winds dominate respectively at the descending phase and at the maximum phase.

关键词： Solar Wind Solar Activity Geomagnetic Activity Solar Cycle

Prevalence of Group B Streptococcus among Pregnant Women in Bobo-Dioulasso (Burkina Faso)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Medical Microbiology 2019年第3期9卷 63-76页

作者： Abdoul-Salam Ouédraogo yacouba sawadogo Der Adolphe Somé An Vercoutere Soufiane Sanou Souleymane Ouattara Fernand Michodigni Armel Poda Moussa Bambara Lassana Sangaré Sylvain Godreuil Departement of Microbiology Laboratory Sour&ocirc Sanou University Hospital Bobo Dioulasso Burkina Faso Department of Obstetrics and Gynecology Sour&ocirc Sanou University Hospital Bobo Dioulasso Burkina Faso Faculty of Medecine and health Sciences Ghent University Ghent Belgium Departement of Infectiology Sour&ocirc Sanou University Hospital Bobo Dioulasso Burkina Faso Departement of Microbiology Laboratory Yalgado Ouedraogo University Hospital Ouagadougou Burkina Faso Bacteriology-Virology Laboratory Montpellier University Hospital Montpellier France

Background: Group B Streptococcus (GBS) or Streptococcus agalactiae, which asymptomatically colonizes the female genital tract, is one of the leading causes of septicemia, meningitis and pneumonia in neonates. This study was conducted in Bobo Dioulasso, Burkina Faso to determine the prevalence of GBS colonization among pregnant women. Methods: Six hundred and eleven (611) pregnant women were screened for GBS colonization between July and December 2016. Vaginal swab samples were aseptically collected from the subjects after oral informed consent. Standard microbiological methods were used to isolate and identify GBS isolates. The antibiotic susceptibility profile of GBS isolates was assessed using the Kirby-Bauer disk diffusion method. Results: Colonization prevalence was 6.05%. No risk factors associated with the carriage rate was statistically identified. All isolates were susceptible to Amoxicillin, Ampicillin, Cefotaxime, Levofloxacin, Vancomycin and Nitrofurantoin. Resistance to antibiotics was found for erythromycin (35.14%), lincomycin (16.22%) and penicillin G (10.81%). Conclusion: Although a low carriage (6.05%) rate and isolates were susceptible to many antibiotics found in this study, a policy of systematic screening of pregnant women at least in the third trimester must be promoted.

关键词： Group B Streptococcus Prevalence GBS Carriage Burkina Faso

Can the Urine Dipstick Test Be an Alternative in the Screening of Urinary Tract Infections for Inpatients in the Context of a Low-Income Country?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Infectious Diseases 2023年第4期13卷 627-640页

作者： André Nagalo Odilon D. Kaboré Senkaye-Lagom Aimée Kissou Hervé Kafando Boukary Kabré Emmanuel Zongo Cheick Ahmed Ouattara yacouba sawadogo Aoua Semdé Jacques Zoungrana Armel Poda Sylvain Godreuil Abdoul-Salam Ouédraogo Bacteriology-Virology Laboratory Sour&#244 Sanou University Hospital Bobo-Dioulasso Burkina Faso Biomedical Analysis Laboratory Regional University Hospital of Ouahigouya Ouahigouya Burkina Faso Department of Medical Pediatrics Sour&#244 Sanou University Hospital Bobo-Dioulasso Burkina Faso Bacteriology-Virology Laboratory Yalgado Ouedraogo University Hospital Ouagadougou Burkina Faso Department of Urology-Andrology Regional Hospital of Tenkodogo Tenkodogo Burkina Faso Information Epidemiology Research and Planning Department Sour&#244 Sanou University Hospital Bobo-Dioulasso Burkina Faso Department of Nephrology-Hemodialysis Sour&#244 Sanou University Hospital Bobo-Dioulasso Burkina Faso Department of Infectious Diseases Sour&#244 Sanou University Hospital Bobo-Dioulasso Burkina Faso Laboratory of Bacteriology of the Arnaud de Villeneuve University Hospital Montpellier France

Background: Urinary Tract Infection (UTI), a prevalent bacterial infection in adults, heavily relies on cytobacteriological examination of urine (CBEU) for diagnosis. However, in resource-limited countries, accessibility to CBEU remains hindered by cost and availability. This study aims to assess the utility of the Urinary Dipstick Test (UDT) in diagnosing UTIs among hospitalized patients in the context of limited resources. Methods: A cross-sectional study was conducted from February to May 2019, encompassing hospitalized patients who underwent CBEU at the bacteriology unit of Sour? Sanou University Hospital. UDT and CBEU were concurrently performed, and UDT’s analytical and diagnostic performance was evaluated against CBEU, considered the gold standard. Results: A total of 274 CBEU requests were registered, involving 274 patients (159 males) with a mean age of 45.8 ± 21.3 years (ranging from 1 to 90 years). UTI was confirmed in 90 patients, yielding a frequency of 32.85%. The UTI bacteriological profile was dominated by Enterobacteriaceae (75.23%), primarily Escherichia coli (60.55%). Nitrite and Leukocytes were positive in 54 (19.8%) and 157 (53.6%) of the samples tested. Among patients with confirmed UTI, Nitrite, and Leukocytes were positive in 30 (33%) and 71 (79%) patients respectively. UDT demonstrated variable performance based on nitrite and leukocyte combination: Sensitivity (57%-82%), Specificity (7%-98%), Positive Predictive Value (PPV) (43%-57%), Negative Predictive Value (NPV) (43%-67%). UDT performed slightly better in women (NPV = 88%) and inpatients without urinary catheters (NPV = 75% and PPV = 80%). Conclusion: This study underscores UDT’s potential utility in excluding UTIs among women, younger patients, and inpatients without urinary catheters, albeit with limited confidence. The UDT emerges as a complementary tool for UTI screening, particularly in resource-limited settings.

关键词： Urine Dipstick Test Urinary Tract Infection LMICs Burkina Faso

Evaluation of the Quality of Household Waste Leachate Treated by Settling Ponds at the Ouagadougou Waste Treatment and Valorization Center

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2017年第12期8卷 1567-1582页

作者： Vianney Demakoye Koné Martine Ouattara yacouba Guinko Seydou sawadogo Siméon Ecole Supérieure Polytechnique Privée de la Jeunesse Ouagadougou Burkina Faso Centre National de la Recherche Scientifique et Technologique Ouagadougou Burkina Faso Direction de la Propreté de la Commune de Ouagadougou Ouagadougou Burkina Faso

In African cities, today’s patterns of consumption are increasingly generating solid and liquid waste. This waste requires adequate management as it poses significant risks to public health and the environment. To meet the challenge in Ouagadougou, a waste treatment and recycling center has been implemented. The leachates from household refuse evacuated in this center are treated by two series settling ponds whose performances have been evaluated throughout the present study. For this purpose, samples were taken from the basins and analyzed weekly for two months. On these samples, the physical parameters (pH, temperature, conductivity), organic pollution indicators (BOD5, COD, SS), nitrogen pollution (nitrate, nitrite) and phosphorus pollution (ortho-phosphates) were evaluated according to AFNOR standards. The average of suspended-matter contents above 13,000 mg/L and this particulate pollution abatement recorded is 2.04%, whereas the Chemical Oxygen Demand reached respective maximum values of 660 and 480 mg/L for both basins. Nutrients such as nitrates were well eliminated whereas orthophosphates are released. PH values varied between 8.62 and 9.51, while electrical conductivity values varied between 482 and 625 μS/cm. The Fecal Coliforms reached maximum concentrations of 10,000 and 12,800 UFC/100mL.

关键词： Waste Leachate BOD5 Fecal Coliforms Conductivity COD NO3

Photovoltaic waste management in sub-Saharan Africa:current practices in Burkina Faso

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Waste Disposal and Sustainable Energy 2024年第2期6卷 271-282页

作者： Kodami Badza Yrebegnan Moussa Soro Marie sawadogo Laboratoire Energies Renouvelables et EfficacitéEnergétique Institut International d'Ingenierie de I'Eau et de I'Environnement(2iE)01 BP 594 OuagadougouBurkina Faso

Sub-Saharan Africa is witnessing a proliferation of photovoltaic(PV)waste due to the increasing number of solar PV power *** waste(panels,batteries,electrical cables,mounting structures,and inverters)consists of elements such as mercury,cadmium,chromium,lead,copper,aluminum,fluorinated compounds,and plastics that are toxic to human health and the environment if a proper management system is not *** many studies worldwide have focused on PV waste management,very few have been conducted in sub-Saharan *** study aims to investigate the current PV waste management system in Burkina Faso,determine stakeholder profiles,and propose strategies to enhance the existing *** research,interviews,questionnaires,and field visits were used in the *** survey showed that young people,mainly under 30 years of age and with a primary education,dominate(70%)in terms of PV waste collection and repair activities,while the more technical recycling and export activities are carried out mainly(88%)by stakeholders older than 40 years and with a secondary education(60%).Among the older stakeholders,100%are aware of the hazardous nature of PV waste,whereas 36%are young *** an environmental perspective,the main source of contamination observed is the release of lead-rich sulfuric acids into water and soil during the collection and repair *** the recycling of batteries and electrical cables,toxic fumes are emitted into the air,and recycling residues rich in toxic substances are *** reduce risks to human health and the environment when managing PV waste,the introduction of legislation,the multiplication of collection points and appropriate infrastructures,the training and awareness-raising of stakeholders,and the extended responsibility of manufacturers are *** on the economic feasibility of setting up formal management structures are needed to complete this work.

关键词： Photovoltaic waste Sub-Saharan Africa Waste management Recycling Batteries Incineration

Planted Sludge Drying Beds in Treatment of Faecal Sludge from Ouagadougou: Case of Two Local Plant Species

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2016年第7期8卷 697-705页

作者： sawadogo Bienvenue Joceline Martine Koné Ouattara yacouba Yonli H. Arsène UFR/SEA Université de Ouagadougou Ouagadougou Burkina Faso Institut de Recherche en Sciences Appliquées et Technologies/CNRST Ouagadougou Burkina Faso

Management of wastewater is a concern of developing countries. In Burkina Faso, an on-site septic system installed on the property is predominant and those systems product high quantities of faecal sludge which are not treated adequately before discharge. Our country is mainly fed by surface water, while water is the main vector of many diseases. So it is very important to manage efficiently wastewater and faeces. The treatment of faecal sludge by planted beds can use local persistent emergent plants like Andropogon gayanus (LPA) and Cymbopogon nardus (LPN). Those planted beds are compared to a non-planted bed (sludge drying bed) (LT). Treating raw sludge (BB) we got the yield over 90% concerning the biological oxygen demand (BOD5) for the LPA while the two others gave performances of 75% and 76% respectively. Regarding the chemical oxygen demand (COD), LPN gave better yields with 77% of removal against 71% and 69% for LPA and LT respectively. Overall, the pilots assured removal of orthophosphates varying between 77% and 79%, while the Kjeldahl nitrogen is removed by the various beds with respective fields of 94%, 96.5% and 97.5% for LPN, LPA and LT. The microbiological pollution abatement is in the order of 1 log unit on average for all beds.

关键词： Sludge Drying Bed Andropogon gayanus Cymbopogon nardus Planted Beds BOD5

Assessing the Impact of Gold Mining on the Quality of Water Resources in the Commune of Meguet, Burkina Faso

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2024年第4期16卷 281-292页

作者： Issoufou Ouedraogo Samuel Lankoande yacouba Konate Boukary sawadogo Nicolas Kagambega Martin Lompo Higher School of Engineering (ESI) University of Fada N&#8217Gourma Fada N&#8217Gourma Burkina Faso Geosciences and Environment Laboratory (LaGE) Joseph KI-ZERBO University Ouagadougou Burkina Faso Water Hydro-Systems and Agriculture Laboratory (LEHSA) International Institute of Water and Environmental Engineering (2iE) Ouagadougou Burkina Faso

Despite its often illegal nature, artisanal gold mining in Burkina Faso contributes to the economic and social development of the country. However, the rudimentary techniques used in gold panning have a significant impact on the environment due to inappropriate practices and the use of various chemical substances. This study aims to assess the impact of artisanal gold mining on the quality of water resources in a rural community at Méguet, Burkina Faso. To this end, surface and groundwater samples were collected and analyzed at the BUMIGEB laboratory. Field results show that the waters are slightly alkaline (6.97 < pH < 8.1), weakly mineralized and conductive (124 < EC < 543 μS/cm), with temperatures ranging from 24.6˚C to 31.6˚C. In addition, trace metals (TMEs) analyzed from surface and subsurface waters show very high levels, generally deviating from the levels recommended by WHO guidelines for Burkina Faso. Trace metals contamination of water resources in the commune of Méguet is mainly due to Fe (3.78 - 11.12 mg/kg), Hg (0.03 - 0.29 mg/kg), As (0.01- 6.31 mg/kg) and Pb (0.01 - 3.8 mg/kg). This study can serve as a basis for guiding national environmental policies to protect the water resources of the Méguet mine.

关键词： Gold Panning Water Quality Trace Metal Méguet Burkina Faso