La jeunesse dans la population active de la France

Quelle extension revêt l'activité professionnelle des jeunes Français? Quelle place tiennent-ils dans les divers secteurs d'activité du pays? Comment se répartissent-ils entre les diverses situations? Quelle évolution se manifeste dans l'orientation de la jeunesse? Telles sont les principales questions abordées dans cet article, extrait d'un mémoire présenté pour le diplôme de l'Institut de statistique de l'Université de Paris. La chaleur généreuse et la compréhension avec lesquelles M. Peritz, jeune statisticien israélien, traite son sujet, ne manqueront pas de lui attirer la sympathie de ses lecteurs.Peritz Eric. La jeunesse dans la population active de la France. In: Population, 8ᵉ année, n°3, 1953. pp. 527-554

Weight Growth in Infancy a Regression Analysis

The function: In (weight) = A -f- B In (Age) + In2 (Age), is proposed for the description of weight in postneonatal infancy, with the parameters A, B and C estimated separately by the method of least squares. The suitability of this function and its practical usefulness are tested on data relating to 449 children from a rural area in Israel, with an average 17.5 weighings per child

A Simple Glycol Nucleic Acid

We here wish to disclose a novel nucleic acid analogue which displays exceptional structural simplicity and atom economy while supporting stable duplex formation. The discovered glycol nucleic acid (GNA) uses the canonical Watson-Crick base pairing scheme combined with an acyclic three-carbon propylene glycol phos-phodiester backbone (Figure 1). Groundbreaking studies of the Eschenmoser group on the chemical etiology of nucleic acid structure have demonstrated that Watson-Crick base pairing can be supported by sugars in the backbone that differ from RNA or DNA.1-3 Most surprisingly, a nucleic acid derived from a tetrose sugar (TNA) was found to be capable of antiparallel duplex formation and crosspairing with DNA and RNA (Figure 1).4 Our laboratory is interested in structurally simplified nucleic acid backbones in order to improve synthetic accessibility of artificia