Open cell fire-resistant foam

Candidate polyphosphazene polymers were investigated to develop a fire-resistant, thermally stable and flexible open cell foam. The copolymers were prepared in several mole ratios of the substituent side chains and a (nominal) 40:60 derivative was selected for formulation studies. Synthesis of the polymers involved solution by polymerization of hexachlorophosphazene to soluble high molecular weight poly(dichlorophosphazene), followed by derivatization of the resultant polymer in a normal fashion to give polymers in high yield and high molecular weight. Small amounts of a cure site were incorporated into the polymer for vulcanization purposes. The poly(aryloxyphosphazenes) exhibited good thermal stability and the first polymer mentioned above exhibited the best thermal behavior of all the candidate polymers studied

Transformations of fragile environments in the Alps and in the Sahel.

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Reconstitution des principaux stades glaciaires du Chablais : base scientifique pour la valorisation d'un patrimoine glaciaire régional

International audienc

Functional analysis of the osteoarthritis susceptibility locus marked by the polymorphism rs10492367

https://nsuworks.nova.edu/nsudigital_harrison/3337/thumbnail.jp

The Diderot meteorite: The second chassignite

The Diderot meteorite is a dunite discovered in Sahara. The martian origin is unambiguous and Diderot shares strong petrographical similarities with Chassigny

Diagnostic des eaux de surface. Application du système modulaire gradué au Boiron de Morges

Les variations hydro-climatiques et anthropiques actuelles et prévues dans le futur interrogent sur l’évolution de l’état écologique des cours d’eau. Il est donc crucial de développer des outils prenant en compte les dimensions quantitatives et qualitatives des ressources en eau. C’est le cas du système modulaire gradué proposé par l’Office fédéral de l’environnement. Cet article présente un retour d’expérience sur la mise en oeuvre de ce système, appliqué au Boiron de Morges, et sur sa capacité à identifier la variabilité spatio-temporelle des enjeux écologiques