Studying a facet of a society implies being attentive to your daily life, especially at work. Today, work has established itself as a central value in our contemporary societies and has become an important source of identity building. It is undergoing profound changes, particularly in the customer relations sector. Our longitudinal study is based on qualitative data collection methods in two Dakar call centers and on the content analysis method. It shows that the work of call center agents is being distorted and transformed because of the conditions in which it is carried out against a background of rationalization and intensification. The work of call center agents is no longer the dream of the early days 20 years ago; the euphoria has given way to disillusionment. Behind technological developments and relocations, there are hidden labor clashes and misfortunes affecting the worker and his society: acculturation, poor management of human resources and working conditions.
As part of the search for natural substances of plant origin as an alternative to chemical pesticides in agriculture, Terminalia ivorensis, to which antifungal virtues are lent, was used in this study to evaluate in vitro the sensitivity of Fusarium oxysporum. The antifungal activity was evaluated by the double dilution method on PDA medium with aqueous and ethanolic extracts at 70% leaf and bark of Terminalia ivorensis compared to Mancozan 80 WP which is a widely used reference fungicide. According to the results, only 70% ethanolic extracts have fungicidal properties on Fusarium oxysporum. The ethanolic bark extract of Terminalia ivorensis was fungicidal at CMF = 6.25 mg / mL. For ethanolic leaf extracts, the CMF was 12.50 mg / mL. The phytochemical sorting of the various extracts showed the presence of secondary metabolites which could justify the antifungal activity of Terminalia ivorensis and its use in traditional medicine.
The role of the natriuretic peptide assay: brain natriuretic peptide (BNP) and N-terminal pro-BNP natriuretic peptide (NT-proBNP) in the diagnosis and prognosis in patients with heart failure has been approved by the Food and Drug Administration (FDA). This dosage is more and more frequently requested in the hospital environment, particularly in the context of the differential diagnosis of dyspnea in a patient presenting to the emergency department. The difficulty for the biologist is to choose between the dosage of BNP biologically active hormone and the assay of NT-proBNP, non-active peptide. This is a bibliographic study that consists of the analysis of different clinical and bibliographic studies that have compared the dosage of these two cardiac markers.
The BNP assay is faster and is characterized by a lower glomerular filtration dependence compared to NT-proBNP and a shorter half-life that allows to rapidly monitor its variations. However, because of its excellent stability, the NT-proBNP makes it possible to avoid the false negatives due to the delay of delivery in the university centers. It is performed by automated technique which allows an easy realization of a large number of tests and it also allows a better detection of the early stages of heart failure.
The white Bandama watershed in its upstream part is strongly anthrophised. Its position in a semi-arid zone gives it a high vulnerability to water erosion. However, water erosion of soils is at the root of many environmental and socio-economic problems. It therefore appears necessary to evaluate soil losses due to water erosion. To do this, the Wischmeier and Smith equation, or Universal Sol Loss Equation: USLE, is therefore a tool of choice for the modeling of the erosive process. This model works with the multiplication of six erosion factors namely the erosivity of the rain, the erodibility of the soil, the inclination and the slope length, the vegetation cover and the anti-erosion practices, in an Geographical Information System. The results obtained are at the scale of the watershed and in spatial unit (pixel of the DTM). Thus, the value of the average losses in 1986 is 42.87 t / ha / year, this value drops to 25.98 t / ha / year in 2001 and stands at 36.53 t / ha / year in 2016. In addition, vegetation cover, erodibility and erosivity of rainfall are the factors that most modulate erosion in this basin.