This work deals with the estimation of solar radiation through a solar tracker aimed at evaluating the effect of solar tracking on the solar deposit in Burkina Faso. Using a two-axis solar tracking system, we experime...This work deals with the estimation of solar radiation through a solar tracker aimed at evaluating the effect of solar tracking on the solar deposit in Burkina Faso. Using a two-axis solar tracking system, we experimentally measured solar radiation at our Joseph KI-ZERBO University site and compared it with that obtained by a numerical simulation run using Fortran programming software based on a mathematical model by Brichambaut. The results obtained from the mathematical and experimental studies show that, with a solar tracker, on a clear-sky day, solar irradiation is between 800 W·m−2 and 1000 W·m−2 between about 8 a.m. and 4 p.m., i.e. a duration of 8 hours of insolation. Analysis of the numerical and experimental results shows very good quantitative and qualitative agreement, with an average relative error of 18%.展开更多
This study aimed to assess the microbiological quality of tiger nut (Cyperus esculentus L.) products sold in Ouagadougou and Bobo Dioulasso. The microbial load of tubers and tiger nut milk was determined using ISO 483...This study aimed to assess the microbiological quality of tiger nut (Cyperus esculentus L.) products sold in Ouagadougou and Bobo Dioulasso. The microbial load of tubers and tiger nut milk was determined using ISO 4833-1 (2003) standard (total mesophilic aerobic flora), NF ISO 7954 (1998) standard (yeasts and molds), and ISO 4832 (2006) standard (total coliforms, thermotolerant coliforms). The results showed that tiger nut tubers had an average microbial load between 4.86 ± 7.03 × 10<sup>6</sup> UFC/g and 1.82 ± 2.30 × 10<sup>7</sup> UFC/g for total mesophilic aerobic flora, from 4.34 ± 10.6 × 10<sup>5</sup> UFC/g to 3.52 ± 4.54 × 10<sup>6</sup> UFC/g for yeasts and molds, from 2.23 ± 2.25 × 10<sup>5</sup> UFC/g to 1.41 ± 2.16 × 10<sup>5</sup> UFC/g for total coliforms and from 1.83 ± 2.03 × 10<sup>5</sup> UFC/g to 7.0 ± 10.8 × 10<sup>4</sup> CFU/g for thermotolerant coliforms. For tiger nut milk samples, the average microbial load varied from 3.48 ± 2.98 × 10<sup>6</sup> CFU/g to 2.80 ± 5.69 × 107 CFU/g for total mesophilic aerobic flora, from 5.00 ± 7.21 × 10<sup>4</sup> CFU/g to 1.88 ± 3.31 × 10<sup>5</sup> CFU/g for yeasts and molds, from 4.58 ± 10.4 × 10<sup>4</sup> CFU/g to 6.31 ± 9.17 × 10<sup>5</sup> CFU/g for total coliforms and 7.00 ± 7.00 × 10<sup>3</sup> CFU/g to 2.87 ± 5.86 × 10<sup>5</sup> CFU/g for thermotolerant coliforms. This study revealed that the tubers and tiger nut milk sold in Ouagadougou and Bobo Dioulasso had a high microbial load which could lead to the degradation of these products and food poisoning for consumers.展开更多
Objectives: Therapeutic compliance can be defined as the degree of adequacy between a patient’s behaviour and his doctor’s recommendations. Non-adherence to treatment has serious consequences in terms of morbidity a...Objectives: Therapeutic compliance can be defined as the degree of adequacy between a patient’s behaviour and his doctor’s recommendations. Non-adherence to treatment has serious consequences in terms of morbidity and mortality. Our aim was to assess adherence among patients treated for chronic inflammatory rheumatism in Lomé. Patients and Methods: This was a multicentre cross-sectional study conducted from January 2015 to December 2021. Patients aged 18 years or older, treated in the rheumatology departments of the Sylvanus Olympio University Hospital or the Bè Hospital during the study period, were included if they were diagnosed with chronic inflammatory rheumatism and started on disease-modifying therapy. Adherence was assessed using the Compliance Questionnaire Rheumatology 19 questionnaire, with a threshold for good compliance set at 80%. Results: Out of 13,214 patients received, 159 suffered from chronic inflammatory rheumatism (hospital frequency 1.5%), and 60 met the inclusion criteria for our study. There were 55 women (91.7%) and 5 men (8.3%), giving a sex-ratio of 1/11. The mean age was 49.5 ± 13.5 years (extremes: 19 and 78 years). Rheumatoid arthritis (68.3%) was the most common rheumatic disease, followed by undefined rheumatic diseases (16.6%) and spondyloarthritis (8.3%). Average compliance with treatment was 76.9% ± 12.4% (extremes 29.8 and 91.2). There was no statistically significant difference according to the type of rheumatism. Conclusion: Overall compliance was poor, with a Compliance Questionnaire Rheumatology 19 of less than 80%. It was non-significantly influenced by socioeconomic status, disease severity and duration of progression.展开更多
Tomato is a widely consumed vegetable in Burkina Faso and throughout the world. However, when handled improperly, it can serve as a vector of pathogen transmission to human if ingested raw or through cross-contaminati...Tomato is a widely consumed vegetable in Burkina Faso and throughout the world. However, when handled improperly, it can serve as a vector of pathogen transmission to human if ingested raw or through cross-contamination with cooked food. This study aimed to determine the prevalence of Salmonella spp from tomatoes sold in the markets of Ouagadougou, Burkina Faso and characteristics of vending conditions. One hundred and ninety-eight (198) different tomato samples were randomly purchased from one hundred and thirteen (113) different vendors in the markets of Ouagadougou. The samples were examined and classified into three categories according to their texture and the level of deterioration. The prevalence of Salmonella spp identification was determined using standard microbiological methods. A survey was conducted using a questionnaire on transport and vending conditions for tomatoes. In total, Salmonella prevalence was 19.19% in all tomato’s samples analyzed and was 18.18% for intact category, 22.73% in D2 category and 16.67% in category D4. The survey revealed poor transport and sales conditions for the majority of tomato sellers. The present study revealed the presence of Salmonella in tomatoes samples. These results highlight the risk associated with the consumption of tomatoes if hygienic practices are not respected during tomatoes handling and preparation. The results of the study also show the need to wash tomatoes systematically after purchase with a disinfectant, especially tomatoes sold in open markets in developing countries.展开更多
Introduction: The prevalence of urticaria is increasing. Approximately 20% of individuals have suffered from an acute episode of urticaria at least at some point in their lives. The objective of this study was to eval...Introduction: The prevalence of urticaria is increasing. Approximately 20% of individuals have suffered from an acute episode of urticaria at least at some point in their lives. The objective of this study was to evaluate the clinical and therapeutic socio-demographic profile and quality of live of patients followed for urticaria in the dermatology-venereology department of the Yalgado Ouédraogo University Hospital in Ouagadougou. Methodology: We conducted a descriptive cross-sectional study over a 5-year period from 1 January 2015 to 31 December 2019. The data were collected retrospectively by analysing the files and prospectively by evaluating the quality of life with DLQI. All the records of patients treated for urticaria at the Dermatology-Venerology Department of the Yalgado Ouédraogo University Hospital during the period were included. Results: Urticarial frequency is 1.91%. There were 36 men (25.71%) and 104 women (74.28%), i.e. a sex ratio of 0.34. The median age was 31 years with extremes of 4 to 70 years. The 30 - 45 age group accounted for 51.42%, followed by the 16 - 29 age group (31.42%), then the 46 - 65 age group (9.28%), the 4 - 15 age group (5.71%) and the over 66 age group (2.14%). In terms of occupation, pupils/students accounted for 37.1%, housewives for 18.6% and workers for 44.3%. As for the residence of the patients, 88.57% lived in Ouagadougou Personal history of atopy, it concerned 19.26% of patients, with precisely 9.28% having asthma history, 7.14% having rhino-sinusitis history, 1.42% of atopic dermatitis and allergic conjunctivitis respectively. For clinical aspects, 97.14% of the patients had superficial urticaria, and 2.86% had facial angioedema. There were 35% (49) patients with acute urticaria and 65% (91) with chronic urticaria. Chronic urticaria was spontaneous in 55% (50) and physically inducible in 10% (9) (sweating, pressure or friction). 97.14% of patients received antihistamines associated with systemic corticoids in 2.86%. For Quality of life, the mean DLQI score was 7.5展开更多
This work presents a contribution to the study of the process of cold production by adsorption from solar energy. In this paper, we discuss a comparative study of the operation of a solar adsorption refrigerator using...This work presents a contribution to the study of the process of cold production by adsorption from solar energy. In this paper, we discuss a comparative study of the operation of a solar adsorption refrigerator using the silica gel-water couple and the zeolite-water couple through dynamic modeling and simulation. The mathematical model representing the evolution of heat and mass transfer at each component of the adsorption solar refrigerator has been developed. It appears from this study that the evolution of the temperature of the two adsorbents (zeolite and silica gel) is quasi-similar throughout the operating cycle. However, the maximum mass of water vapor adsorbed by the silicagel (0.24 kg/kg) is higher than that adsorbed by the zeolite (0.201 kg/kg). In the same way, the mass of water vapor cycled, obtained with the silicagel-water couple which is 0.14 kg/kg, is higher than that obtained with the zeolite-water couple which is 0.081 kg/kg. Therefore, the amount of cold produced 9.178 MJ and the solar coefficient of performance 0.378 obtained with the solar refrigerator using the silica gel-water couple, are better.展开更多
Background: Ankylosing spondylitis is rare in sub-Saharan Africa. The purpose of our study was to report cases of AS in a black African population and to see the influence of gender. Method: It was a retrospective stu...Background: Ankylosing spondylitis is rare in sub-Saharan Africa. The purpose of our study was to report cases of AS in a black African population and to see the influence of gender. Method: It was a retrospective study conducted in the Rheumatology Department of Ouagadougou University Hospital, Ouagadougou, from March 2006 to February 28, 2015 for a period of nine years. All the patients who went under a rheumatology consultation during the study period were included. Patients with AS defined by the modified New York criteria were selected. Result: Forty-eight (0.61%) cases of AS were diagnosed among 7806 patients received in the rheumatology department during the study period. The search for the HLA B27 antigen in 20 patients was positive in 11 (55%). Half of the patients (50%) had a BASDAI score ≥ 4. Sacroiliitis was observed in all patients;it was stage 4 in 8 patients. Comparing by sex, there was no statistically significant difference by gender. Conclusion: Prevalence of ankylosing spondylitis increases. The presentation is similar to that of the caucasian series.展开更多
Introduction: Diabetic neuropathy is one of the most common chronic complications of diabetes. Most of the studies on the subject in the sub region, particularly in Burkina Faso, dealt it with the study of the complic...Introduction: Diabetic neuropathy is one of the most common chronic complications of diabetes. Most of the studies on the subject in the sub region, particularly in Burkina Faso, dealt it with the study of the complications of diabetes, or one of its components. Our study was designed to study in particular in all its aspects, by searching for its peculiarities in our context, for improvement of its support. Methodology: This is a cross-sectional descriptive study carried out in 150 diabetic patients aged at least 15 years followed in the Department of Internal Medicine at Yalgado Ouedraogo University Teaching Hospital. All patients included had agreed to participate in our survey after informed consent. We collected the data during the period from 2015 November to 2016 June. Each patient was evaluated by the DN4 questionnaire and clinically by a neurological examination. We determinated the frequency, the sociodemographic, clinical and therapeutic characteristics of diabetes neuropathy and its related factors. Results: The frequency of diabetic neuropathy was 80.7%. Peripheral neuropathies were seen in 81.8% of cases and autonomic neuropathies in 72.7% of cases. Autonomic neuropathy was dominated by the DAN (59.1%), and erectile dysfunction (44%). There was a high comorbidity with physical inactivity (66.9%), obesity (49.4%) and hypertension (38.8%). There were poorly controlled patients in 38.8%. A link was found between T2DM and neuropathy (p = 0.014). Painful diabetes was related to the quality of glycemic control (p = 0.007), and hypertension (p = 0.021). A link was also found between tobacco consumption (p < 0.001), male (p < 0.001), and urogenital autonomic neuropathy. Conclusion: Diabetic neuropathies are very common in our context and could be a haunting to the practitioner with the progression of diabetes and its corollary of degenerative complications. There was a significant association between Type 2 Diabetes mellitus and the presence of peripheral diabetic neuropathy.展开更多
The sorption behaviour and water transport mechanisms inside Spirulina platensis samples were experimentally analysed during isothermal drying at 25℃ and 50℃. Two different products grown in semi-industrial farms fr...The sorption behaviour and water transport mechanisms inside Spirulina platensis samples were experimentally analysed during isothermal drying at 25℃ and 50℃. Two different products grown in semi-industrial farms from Burkina Faso and France with initial water contents respectively of the range from 2.73 kg w /kg dm to 3.12 kg w /kg dm were characterized. A novel procedure has been developed to determine the water content profiles inside samples during isothermal drying. At both temperatures, experimental results underlined that the physical properties of Spirulina are not sensitive to the geographical origin, Burkina-Faso or France. To keep Spirulina at an water activity below 0.6 in order to preserve it from micro-organisms development, sorption isotherm curves show that a sufficient requirement is to lower the water content until an upper limit of w = 0.075 db. The evolution of water transport coefficient as a function of water content highlights a monotonous exponential dependence with a transport coefficient ranging from 1.70 × 10–10 to 94 × 10–10 m2/s. The contribution of solid phase shrinkage to the transport of water is negligible for the last drying steps.展开更多
This work concerns a dynamic modeling and a numerical simulation of the operation of an adsorption solar refrigeration system using the zeolite-water couple. For this, a mathematical model representing the evolution o...This work concerns a dynamic modeling and a numerical simulation of the operation of an adsorption solar refrigeration system using the zeolite-water couple. For this, a mathematical model representing the evolution of heat and mass transfer at each component of the solar adsorption refrigerator has been developed. We have adopted the Dubinin-Astakhov model for the adsorption kinetics of the zeolite/water pair. This model allows to describe the phenomenon of adsorption and to calculate the rate of adsorbate (water) in the zeolite (adsorbent) as a function of the temperature and the pressure. The equations governing the operation of the solar adsorption refrigerator, deduced from the thermal and mass balances established at the collector adsorber, condenser and evaporator components, were solved by an implicit finite difference scheme and Gauss Seidel’s iterative method. We have validated the model established by applying it to the model of Allouhi et al. 2014. We analyzed the influence of the adsorbate/adsorbent couples, the solar flux, the ambient temperature on the adsorption and desorption process. The temperature profiles obtained representing the temperature evolution of the glass, the absorbent plate, the zeolite-water mixture, the condenser, the evaporator, as well as the pressure and the adsorbed mass allowed us to evaluate the performance of the solar adsorption refrigerator. SCOP is higher the higher the solar flux captured by the collector-adsorber.展开更多
Hydric properties evolution during drying differs from one product to another and has been the subject of various studies due to its crucial importance in modeling the drying process. The variation of these parameters...Hydric properties evolution during drying differs from one product to another and has been the subject of various studies due to its crucial importance in modeling the drying process. The variation of these parameters in the solid matrix and in time during the drying of Spirulina platensis has not known an advanced understanding. The objective of this study was to evaluate the evolution of the water content profile, the mass flow, the concentration gradient and the diffusion coefficient during the drying of Spirulina platensis taking into account the shrinkage. Modeling and experimental analysis (at 50°C and HR = 6%) by the cutting method a cylinder 20 mm in diameter and 40 mm thick were carried. The water content profiles of two different products grown in semi-industrial farms from Burkina Faso and France with initial water contents respectively of the range from 2.73 kgw/kgdb and 3.12 kgw/kgdb were determined. These profiles have been adjusted by a polynomial function. Identical water behavior is observed regardless of the origin of the samples. Water distribution is heterogeneous. Mass flow and concentration gradient are greater at the edge than inside the product. The water transport coefficient, ranging from 1.70 × 10?10 to 94 × 10?10 m2/s, is determined from a linear approach.展开更多
Sahel zone has been reported as one of the most vulnerable regions to climate change, so serious attention must be paid to this zone by researchers and development actors who are interested in environmental-human dyna...Sahel zone has been reported as one of the most vulnerable regions to climate change, so serious attention must be paid to this zone by researchers and development actors who are interested in environmental-human dynamics and interactions. The aim of this study was to bring more insight into the impact of actions aiming at reducing land degradation, regreening the Sahel, stopping population migration and reducing the pressure on land in the Sahelian zone. The study focused on farmland dynamic in Ouahigouya municipality based on remote sensing data from 1986 to 2016 using intensity analysis. The annual time interval change was 0.77% and 2.46% for 1986-2001 and 2001-2016, respectively. Farmlands gained from mixt vegetation, water bodies and from bar lands. Mixed vegetation and water bodies were both active during both intervals while the other land use such as woodland and bar land were dormant. Combining land use land cover analysis and intensity analysis was found to be effective for assessing the differentiated impact of the various land restoration actions.展开更多
Rheumatoid arthritis (RA) and gout are common diseases, but their coexistence is rare. We describe the case of a 76-year-old man with hypertension who had been treated for gout for 20 years on allopurinol and colchici...Rheumatoid arthritis (RA) and gout are common diseases, but their coexistence is rare. We describe the case of a 76-year-old man with hypertension who had been treated for gout for 20 years on allopurinol and colchicine. He was seen in consultation for deforming polyarthritis of the small and large joints, which had been evolving for about 2 years. The acute episode occurred 10 days earlier with the onset of bilateral and symmetrical polyarthritis affecting the large and small joints. The physical examination revealed a peripheral joint syndrome with ulnar gale force deformities of the hands and several buttonhole deformities of the fingers. In addition, there were nodules, some of which were fistulised, giving rise to a chalky slurry. The biology revealed an inflammatory syndrome in addition to rheumatoid factors and ACPA, which were elevated. Biological analysis of the nodular fluid revealed clusters of sodium urate crystals and ultrasound scans of the joints revealed a double-contour appearance in several joints. The diagnosis of RA was made using the 2010 ACR/EULAR criteria. The patient was treated as an outpatient with corticosteroids before being put on methotrexate. It is important to understand that these two conditions can occur at the same time, so it is important to consider them when treating patients with gout or RA.展开更多
Diabetes mellitus is a socially significant disease characterized by chronic hyperglycemia and metabolic disorders of proteins, carbohydrates, and lipids due to reduced function of insulin. Medicinal plants, rich in b...Diabetes mellitus is a socially significant disease characterized by chronic hyperglycemia and metabolic disorders of proteins, carbohydrates, and lipids due to reduced function of insulin. Medicinal plants, rich in bioactive components that promote prevention and treatment, are inexpensive and no side effects. <i>Apium graveolens</i>, <i>Cleome gynandra</i>, and <i>Hibiscus sabdariffa</i> from Burkina Faso were investigated for their phytochemical profile and antioxidant activities. The high-performance thin-layer chromatography profile revealed flavonoids, tannins, and sterols in these herbaceous. The <i>Hibiscus sabdariffa</i> methanolic extract exhibited the highest total phenolic (138.4 ± 0.5 mg GAE/g DW) and flavonoid (52.8 ± 0.6 mg RuE/g DW) contents comparatively to <i>Cleome gynandra</i> and <i>Apium graveolens</i>. <i>Hibiscus sabdariffa</i> methanolic extract also presented the highest antioxidant activity (IC<sub>50</sub> = 0.31 ± 0.002 mg/mL) using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity assay. A high correlation between flavonoid contents and hydrophilic antioxidant activities (r = 0.99) was observed, indicating that flavonoids contribute significatively to these herbaceous antioxidant properties. <i>Apium graveolens</i>, <i>Cleome gynandra, and <i>Hibiscus sabdariffa</i> constitute a natural source of phenolic compounds that could be exploited in diabetes mellitus management.</i>展开更多
文摘This work deals with the estimation of solar radiation through a solar tracker aimed at evaluating the effect of solar tracking on the solar deposit in Burkina Faso. Using a two-axis solar tracking system, we experimentally measured solar radiation at our Joseph KI-ZERBO University site and compared it with that obtained by a numerical simulation run using Fortran programming software based on a mathematical model by Brichambaut. The results obtained from the mathematical and experimental studies show that, with a solar tracker, on a clear-sky day, solar irradiation is between 800 W·m−2 and 1000 W·m−2 between about 8 a.m. and 4 p.m., i.e. a duration of 8 hours of insolation. Analysis of the numerical and experimental results shows very good quantitative and qualitative agreement, with an average relative error of 18%.
文摘This study aimed to assess the microbiological quality of tiger nut (Cyperus esculentus L.) products sold in Ouagadougou and Bobo Dioulasso. The microbial load of tubers and tiger nut milk was determined using ISO 4833-1 (2003) standard (total mesophilic aerobic flora), NF ISO 7954 (1998) standard (yeasts and molds), and ISO 4832 (2006) standard (total coliforms, thermotolerant coliforms). The results showed that tiger nut tubers had an average microbial load between 4.86 ± 7.03 × 10<sup>6</sup> UFC/g and 1.82 ± 2.30 × 10<sup>7</sup> UFC/g for total mesophilic aerobic flora, from 4.34 ± 10.6 × 10<sup>5</sup> UFC/g to 3.52 ± 4.54 × 10<sup>6</sup> UFC/g for yeasts and molds, from 2.23 ± 2.25 × 10<sup>5</sup> UFC/g to 1.41 ± 2.16 × 10<sup>5</sup> UFC/g for total coliforms and from 1.83 ± 2.03 × 10<sup>5</sup> UFC/g to 7.0 ± 10.8 × 10<sup>4</sup> CFU/g for thermotolerant coliforms. For tiger nut milk samples, the average microbial load varied from 3.48 ± 2.98 × 10<sup>6</sup> CFU/g to 2.80 ± 5.69 × 107 CFU/g for total mesophilic aerobic flora, from 5.00 ± 7.21 × 10<sup>4</sup> CFU/g to 1.88 ± 3.31 × 10<sup>5</sup> CFU/g for yeasts and molds, from 4.58 ± 10.4 × 10<sup>4</sup> CFU/g to 6.31 ± 9.17 × 10<sup>5</sup> CFU/g for total coliforms and 7.00 ± 7.00 × 10<sup>3</sup> CFU/g to 2.87 ± 5.86 × 10<sup>5</sup> CFU/g for thermotolerant coliforms. This study revealed that the tubers and tiger nut milk sold in Ouagadougou and Bobo Dioulasso had a high microbial load which could lead to the degradation of these products and food poisoning for consumers.
文摘Objectives: Therapeutic compliance can be defined as the degree of adequacy between a patient’s behaviour and his doctor’s recommendations. Non-adherence to treatment has serious consequences in terms of morbidity and mortality. Our aim was to assess adherence among patients treated for chronic inflammatory rheumatism in Lomé. Patients and Methods: This was a multicentre cross-sectional study conducted from January 2015 to December 2021. Patients aged 18 years or older, treated in the rheumatology departments of the Sylvanus Olympio University Hospital or the Bè Hospital during the study period, were included if they were diagnosed with chronic inflammatory rheumatism and started on disease-modifying therapy. Adherence was assessed using the Compliance Questionnaire Rheumatology 19 questionnaire, with a threshold for good compliance set at 80%. Results: Out of 13,214 patients received, 159 suffered from chronic inflammatory rheumatism (hospital frequency 1.5%), and 60 met the inclusion criteria for our study. There were 55 women (91.7%) and 5 men (8.3%), giving a sex-ratio of 1/11. The mean age was 49.5 ± 13.5 years (extremes: 19 and 78 years). Rheumatoid arthritis (68.3%) was the most common rheumatic disease, followed by undefined rheumatic diseases (16.6%) and spondyloarthritis (8.3%). Average compliance with treatment was 76.9% ± 12.4% (extremes 29.8 and 91.2). There was no statistically significant difference according to the type of rheumatism. Conclusion: Overall compliance was poor, with a Compliance Questionnaire Rheumatology 19 of less than 80%. It was non-significantly influenced by socioeconomic status, disease severity and duration of progression.
文摘Tomato is a widely consumed vegetable in Burkina Faso and throughout the world. However, when handled improperly, it can serve as a vector of pathogen transmission to human if ingested raw or through cross-contamination with cooked food. This study aimed to determine the prevalence of Salmonella spp from tomatoes sold in the markets of Ouagadougou, Burkina Faso and characteristics of vending conditions. One hundred and ninety-eight (198) different tomato samples were randomly purchased from one hundred and thirteen (113) different vendors in the markets of Ouagadougou. The samples were examined and classified into three categories according to their texture and the level of deterioration. The prevalence of Salmonella spp identification was determined using standard microbiological methods. A survey was conducted using a questionnaire on transport and vending conditions for tomatoes. In total, Salmonella prevalence was 19.19% in all tomato’s samples analyzed and was 18.18% for intact category, 22.73% in D2 category and 16.67% in category D4. The survey revealed poor transport and sales conditions for the majority of tomato sellers. The present study revealed the presence of Salmonella in tomatoes samples. These results highlight the risk associated with the consumption of tomatoes if hygienic practices are not respected during tomatoes handling and preparation. The results of the study also show the need to wash tomatoes systematically after purchase with a disinfectant, especially tomatoes sold in open markets in developing countries.
文摘Introduction: The prevalence of urticaria is increasing. Approximately 20% of individuals have suffered from an acute episode of urticaria at least at some point in their lives. The objective of this study was to evaluate the clinical and therapeutic socio-demographic profile and quality of live of patients followed for urticaria in the dermatology-venereology department of the Yalgado Ouédraogo University Hospital in Ouagadougou. Methodology: We conducted a descriptive cross-sectional study over a 5-year period from 1 January 2015 to 31 December 2019. The data were collected retrospectively by analysing the files and prospectively by evaluating the quality of life with DLQI. All the records of patients treated for urticaria at the Dermatology-Venerology Department of the Yalgado Ouédraogo University Hospital during the period were included. Results: Urticarial frequency is 1.91%. There were 36 men (25.71%) and 104 women (74.28%), i.e. a sex ratio of 0.34. The median age was 31 years with extremes of 4 to 70 years. The 30 - 45 age group accounted for 51.42%, followed by the 16 - 29 age group (31.42%), then the 46 - 65 age group (9.28%), the 4 - 15 age group (5.71%) and the over 66 age group (2.14%). In terms of occupation, pupils/students accounted for 37.1%, housewives for 18.6% and workers for 44.3%. As for the residence of the patients, 88.57% lived in Ouagadougou Personal history of atopy, it concerned 19.26% of patients, with precisely 9.28% having asthma history, 7.14% having rhino-sinusitis history, 1.42% of atopic dermatitis and allergic conjunctivitis respectively. For clinical aspects, 97.14% of the patients had superficial urticaria, and 2.86% had facial angioedema. There were 35% (49) patients with acute urticaria and 65% (91) with chronic urticaria. Chronic urticaria was spontaneous in 55% (50) and physically inducible in 10% (9) (sweating, pressure or friction). 97.14% of patients received antihistamines associated with systemic corticoids in 2.86%. For Quality of life, the mean DLQI score was 7.5
文摘This work presents a contribution to the study of the process of cold production by adsorption from solar energy. In this paper, we discuss a comparative study of the operation of a solar adsorption refrigerator using the silica gel-water couple and the zeolite-water couple through dynamic modeling and simulation. The mathematical model representing the evolution of heat and mass transfer at each component of the adsorption solar refrigerator has been developed. It appears from this study that the evolution of the temperature of the two adsorbents (zeolite and silica gel) is quasi-similar throughout the operating cycle. However, the maximum mass of water vapor adsorbed by the silicagel (0.24 kg/kg) is higher than that adsorbed by the zeolite (0.201 kg/kg). In the same way, the mass of water vapor cycled, obtained with the silicagel-water couple which is 0.14 kg/kg, is higher than that obtained with the zeolite-water couple which is 0.081 kg/kg. Therefore, the amount of cold produced 9.178 MJ and the solar coefficient of performance 0.378 obtained with the solar refrigerator using the silica gel-water couple, are better.
文摘Background: Ankylosing spondylitis is rare in sub-Saharan Africa. The purpose of our study was to report cases of AS in a black African population and to see the influence of gender. Method: It was a retrospective study conducted in the Rheumatology Department of Ouagadougou University Hospital, Ouagadougou, from March 2006 to February 28, 2015 for a period of nine years. All the patients who went under a rheumatology consultation during the study period were included. Patients with AS defined by the modified New York criteria were selected. Result: Forty-eight (0.61%) cases of AS were diagnosed among 7806 patients received in the rheumatology department during the study period. The search for the HLA B27 antigen in 20 patients was positive in 11 (55%). Half of the patients (50%) had a BASDAI score ≥ 4. Sacroiliitis was observed in all patients;it was stage 4 in 8 patients. Comparing by sex, there was no statistically significant difference by gender. Conclusion: Prevalence of ankylosing spondylitis increases. The presentation is similar to that of the caucasian series.
文摘Introduction: Diabetic neuropathy is one of the most common chronic complications of diabetes. Most of the studies on the subject in the sub region, particularly in Burkina Faso, dealt it with the study of the complications of diabetes, or one of its components. Our study was designed to study in particular in all its aspects, by searching for its peculiarities in our context, for improvement of its support. Methodology: This is a cross-sectional descriptive study carried out in 150 diabetic patients aged at least 15 years followed in the Department of Internal Medicine at Yalgado Ouedraogo University Teaching Hospital. All patients included had agreed to participate in our survey after informed consent. We collected the data during the period from 2015 November to 2016 June. Each patient was evaluated by the DN4 questionnaire and clinically by a neurological examination. We determinated the frequency, the sociodemographic, clinical and therapeutic characteristics of diabetes neuropathy and its related factors. Results: The frequency of diabetic neuropathy was 80.7%. Peripheral neuropathies were seen in 81.8% of cases and autonomic neuropathies in 72.7% of cases. Autonomic neuropathy was dominated by the DAN (59.1%), and erectile dysfunction (44%). There was a high comorbidity with physical inactivity (66.9%), obesity (49.4%) and hypertension (38.8%). There were poorly controlled patients in 38.8%. A link was found between T2DM and neuropathy (p = 0.014). Painful diabetes was related to the quality of glycemic control (p = 0.007), and hypertension (p = 0.021). A link was also found between tobacco consumption (p < 0.001), male (p < 0.001), and urogenital autonomic neuropathy. Conclusion: Diabetic neuropathies are very common in our context and could be a haunting to the practitioner with the progression of diabetes and its corollary of degenerative complications. There was a significant association between Type 2 Diabetes mellitus and the presence of peripheral diabetic neuropathy.
文摘The sorption behaviour and water transport mechanisms inside Spirulina platensis samples were experimentally analysed during isothermal drying at 25℃ and 50℃. Two different products grown in semi-industrial farms from Burkina Faso and France with initial water contents respectively of the range from 2.73 kg w /kg dm to 3.12 kg w /kg dm were characterized. A novel procedure has been developed to determine the water content profiles inside samples during isothermal drying. At both temperatures, experimental results underlined that the physical properties of Spirulina are not sensitive to the geographical origin, Burkina-Faso or France. To keep Spirulina at an water activity below 0.6 in order to preserve it from micro-organisms development, sorption isotherm curves show that a sufficient requirement is to lower the water content until an upper limit of w = 0.075 db. The evolution of water transport coefficient as a function of water content highlights a monotonous exponential dependence with a transport coefficient ranging from 1.70 × 10–10 to 94 × 10–10 m2/s. The contribution of solid phase shrinkage to the transport of water is negligible for the last drying steps.
文摘This work concerns a dynamic modeling and a numerical simulation of the operation of an adsorption solar refrigeration system using the zeolite-water couple. For this, a mathematical model representing the evolution of heat and mass transfer at each component of the solar adsorption refrigerator has been developed. We have adopted the Dubinin-Astakhov model for the adsorption kinetics of the zeolite/water pair. This model allows to describe the phenomenon of adsorption and to calculate the rate of adsorbate (water) in the zeolite (adsorbent) as a function of the temperature and the pressure. The equations governing the operation of the solar adsorption refrigerator, deduced from the thermal and mass balances established at the collector adsorber, condenser and evaporator components, were solved by an implicit finite difference scheme and Gauss Seidel’s iterative method. We have validated the model established by applying it to the model of Allouhi et al. 2014. We analyzed the influence of the adsorbate/adsorbent couples, the solar flux, the ambient temperature on the adsorption and desorption process. The temperature profiles obtained representing the temperature evolution of the glass, the absorbent plate, the zeolite-water mixture, the condenser, the evaporator, as well as the pressure and the adsorbed mass allowed us to evaluate the performance of the solar adsorption refrigerator. SCOP is higher the higher the solar flux captured by the collector-adsorber.
文摘Hydric properties evolution during drying differs from one product to another and has been the subject of various studies due to its crucial importance in modeling the drying process. The variation of these parameters in the solid matrix and in time during the drying of Spirulina platensis has not known an advanced understanding. The objective of this study was to evaluate the evolution of the water content profile, the mass flow, the concentration gradient and the diffusion coefficient during the drying of Spirulina platensis taking into account the shrinkage. Modeling and experimental analysis (at 50°C and HR = 6%) by the cutting method a cylinder 20 mm in diameter and 40 mm thick were carried. The water content profiles of two different products grown in semi-industrial farms from Burkina Faso and France with initial water contents respectively of the range from 2.73 kgw/kgdb and 3.12 kgw/kgdb were determined. These profiles have been adjusted by a polynomial function. Identical water behavior is observed regardless of the origin of the samples. Water distribution is heterogeneous. Mass flow and concentration gradient are greater at the edge than inside the product. The water transport coefficient, ranging from 1.70 × 10?10 to 94 × 10?10 m2/s, is determined from a linear approach.
文摘Sahel zone has been reported as one of the most vulnerable regions to climate change, so serious attention must be paid to this zone by researchers and development actors who are interested in environmental-human dynamics and interactions. The aim of this study was to bring more insight into the impact of actions aiming at reducing land degradation, regreening the Sahel, stopping population migration and reducing the pressure on land in the Sahelian zone. The study focused on farmland dynamic in Ouahigouya municipality based on remote sensing data from 1986 to 2016 using intensity analysis. The annual time interval change was 0.77% and 2.46% for 1986-2001 and 2001-2016, respectively. Farmlands gained from mixt vegetation, water bodies and from bar lands. Mixed vegetation and water bodies were both active during both intervals while the other land use such as woodland and bar land were dormant. Combining land use land cover analysis and intensity analysis was found to be effective for assessing the differentiated impact of the various land restoration actions.
文摘Rheumatoid arthritis (RA) and gout are common diseases, but their coexistence is rare. We describe the case of a 76-year-old man with hypertension who had been treated for gout for 20 years on allopurinol and colchicine. He was seen in consultation for deforming polyarthritis of the small and large joints, which had been evolving for about 2 years. The acute episode occurred 10 days earlier with the onset of bilateral and symmetrical polyarthritis affecting the large and small joints. The physical examination revealed a peripheral joint syndrome with ulnar gale force deformities of the hands and several buttonhole deformities of the fingers. In addition, there were nodules, some of which were fistulised, giving rise to a chalky slurry. The biology revealed an inflammatory syndrome in addition to rheumatoid factors and ACPA, which were elevated. Biological analysis of the nodular fluid revealed clusters of sodium urate crystals and ultrasound scans of the joints revealed a double-contour appearance in several joints. The diagnosis of RA was made using the 2010 ACR/EULAR criteria. The patient was treated as an outpatient with corticosteroids before being put on methotrexate. It is important to understand that these two conditions can occur at the same time, so it is important to consider them when treating patients with gout or RA.
文摘Diabetes mellitus is a socially significant disease characterized by chronic hyperglycemia and metabolic disorders of proteins, carbohydrates, and lipids due to reduced function of insulin. Medicinal plants, rich in bioactive components that promote prevention and treatment, are inexpensive and no side effects. <i>Apium graveolens</i>, <i>Cleome gynandra</i>, and <i>Hibiscus sabdariffa</i> from Burkina Faso were investigated for their phytochemical profile and antioxidant activities. The high-performance thin-layer chromatography profile revealed flavonoids, tannins, and sterols in these herbaceous. The <i>Hibiscus sabdariffa</i> methanolic extract exhibited the highest total phenolic (138.4 ± 0.5 mg GAE/g DW) and flavonoid (52.8 ± 0.6 mg RuE/g DW) contents comparatively to <i>Cleome gynandra</i> and <i>Apium graveolens</i>. <i>Hibiscus sabdariffa</i> methanolic extract also presented the highest antioxidant activity (IC<sub>50</sub> = 0.31 ± 0.002 mg/mL) using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity assay. A high correlation between flavonoid contents and hydrophilic antioxidant activities (r = 0.99) was observed, indicating that flavonoids contribute significatively to these herbaceous antioxidant properties. <i>Apium graveolens</i>, <i>Cleome gynandra, and <i>Hibiscus sabdariffa</i> constitute a natural source of phenolic compounds that could be exploited in diabetes mellitus management.</i>
