Sur les antigènes du penicillium notatum

Notes sur les Ixodidés du genre Hyalomma (Koch)

Les inscriptions du temps sur les cadrans solaires

Interrogation de données multimédia fondée sur les connaissances du domaine

In this paper, we present a domain knowledge based approach to retrieve multimedia data described by using the MPEG-7 standard. This standard is used since it provides tools to represent, in the same description, the structural and semantic aspects of the multimedia content. However, due to its XML schema based definition, MPEG-7 lacks ability to describe implicit information and to integrate d...

Sur les sous-groupes nilpotents du groupe de Cremona

We describe the nilpotent subgroups of the group Bir(P(C)) of birational transformations of the complex projective plane. Let N be a nilpotent subgroup of class k > 1; then either each element of N has finite order, or N is virtually metabelian.

From Two Strains of Penicillium Notatum

This paper is the second of a series dealing with the analysis of penicillin by means of a chromatogram using solvent-phosphate buffer partition on a silica base. The first paper (Levi, 1948) described the development of this type of chromatogram which is based on that ofMartin & Synge (1941), and outlined the principles of its application to the study of penicillin. The work described was carr...