PDEs belong to a large superfamily [11 different gene families (PDEs 1–11)] of structurally related, functionally distinct, and highly regulated enzymes (Francis et al., 2001). Most PDE families comprise more than one gene ( 20 PDE genes), which generate multiple protein products ( 50 PDE proteins) via alternative mRNA splicing or use of different promoters/transcription initiation sites. Most ...

Reseña del libro CORBIN, A. (2020): Terra Incognita. Une histoire de l’ignorance. París: Albin Michel.

Abstract:   A two-dimensional fully implicit finite difference model, which can be easily extended to three dimensions, is developed to study the effect of cut-off walls on saltwater intrusion into the aquifers. This model consists of a coupled system of two nonlinear partial differential equations which describe unsteady density-driven groundwater flow and solute transport. The numerica...

[This paper, delivered at the Colloquium on Symbolism in Paris in June 1964, appeared in the Cahiers internationaux de symbolisme 6, Brussels 1964, pp. 3-26. The version printed here has been condensed (with the permission of the author) by omitting paragraphs of a technical nature on pages 5 and 8 of the original, as well as an account (pp. 17-23) of the topography of the Eighth Clime. The com...

The C-C bond formation is an important reaction in organic synthesis to obtain value-added intermediates. Therefore, in this paper an attempt has been made to accelerate the Henry reaction (C-C bond formation) between aryl aldehydes and nitromethane using less expensive whole cell biocatalyst, baker’s yeast (BY). The scope of the methodology was also tested for the heteryl aldehyde i.e. 2-chlor...