The “Web of pros” in the 1990s: The professional acclimation of the World Wide Web in France

peer reviewedThis article, focusing on France, explores the notion of a “Web of professionals” and seeks to establish its factual, epistemological, and methodological implications for the history of the World Wide Web in the 1990s. This research reflects on the promises of the New Economy and the roles of the various controversies, cultures, imaginaries, and forms of mediation affecting the business world in its appropriation of the Web. It also aims to reappraise the individual and collective stakeholders whose active part has been somehow underestimated or obscured by the image of the mass Internet user. The professionalization of Web activities, the development of a new generation of entrepreneurs and the conversion of business models to online practices are all significant parts of the emergent Web culture in France, as well as factors contributing to this emergence.Web9

Effects of two medicinal plants Psidium guajava L. (Myrtaceae) and Diospyros mespiliformis L. (Ebenaceae) leaf extracts on rat skeletal muscle cells in primary culture

Crude decoction, aqueous and ethanolic extracts of two medicinal plants (Psidium guajava and Diospyros mespiliformis), widely used in the central plateau of Burkina Faso to treat many diseases were evaluated for their antagonistic effects on caffeine induced calcium release from sarcoplasmic reticulum of rat skeletal muscle cells. These different extracts showed a decrease of caffeine induced calcium release in a dose dependent manner. Comparison of the results showed that Psidium guajava leaf extracts are more active than extracts of Diospyros mespiliformis and that crude decoctions show better inhibitory activity. The observed results could explaine their use as antihypertensive and antidiarrhoeal agents in traditional medicine, by inhibiting intracellular calcium release

Analysis of the biological aerosol

We analyze some relevant problems of the microbial groups, with particular attention to cultural techniques, which are still the ones that are used most frequently