Illustrer Alexandre Dumas, éd. Ph. Poux-Jalaguier et Cl. Schopp

( Ph ) ] ( Cl )

The reaction o f Cp'2ZrCl2 (1) (Cp' = C 5H 4M e) with L i(T H F )2P (SiM e3)2 yields the zirconoocene m onophosphido com plex Cp'2Z r(Cl){P(SiM e3)2} (2) in good yield. 2 reacts with diphenyl­ carbodiim ide with insertion o f the heterocum ulene into the Z r P bond to give Cp'22 r[N (P h )C {P (S iM e3)2}N (Ph)](C l) (3). 2 and 3 were characterized spectroscopically (IR, N M R ), and an X-ray s...

ANALYSE Eric CANCES et Alexandre ERN Septembre 2011

Les maladies causées par Clostridium perfringens et Cl. novyi

COMPONENTS FOR IMMERSION Alexandre

A person is immersed when they feel part of an environment they experience and influence. While virtual immersion systems are usually designed on a case by case basis, and are not easily reusable or scalable, our goal is to specify and develop a framework for the design and integration of immersive systems. We address the issues raised in the design and implementation of the middleware componen...

The Jean Dumas Method

Jean Dumas (Fig. 1) published his combustion method in Paris back in 1848. This makes the method considerably older than Kjeldahl digestion. While researching the composition of natural oils, Dumas tried combusting his samples, initially to analyse the carbon and hydrogen contained therein. Combustion therefore makes it possible to analyse multiple parameters, while Kjeldahl digestion is only s...