A fractal approach to the rheology of concentrated cell suspensions

Results on the rheological behavior of novel CHO cell suspensions in a large range of concentrations are reported. The concentration dependent yield stress and elastic plateau modulus are formalized in the context of fractal aggregates under shear, and quite different exponents are found as compared to the case of red blood cell suspensions. This is explained in terms of intrinsic microscopic parameters such as the cell-cell adhesion energy and cell elasticity but also the cell individual dynamic properties, found to correlate well with viscoelastic data at large concentrations (phi>0.5).Comment: 4 pages, 5 figure

John Carlos Rowe & Eric Haralson (eds). A Historical Guide To Henry James.

Like all the volumes belonging to the series entitled The Historical Guides to American Authors, this collection of critical essays on Henry James is both “interdisciplinary” and “historically sensitive,” and combines close attention to one of the most widely read and studied American authors with a “strong sense of time, place, and history,” and a focus on issues that can still be considered as contemporary. It is indeed tantalizing to realize, as the co-editors write, that “James’s populari..

John Carlos Rowe & Eric Haralson (eds). A Historical Guide To Henry James.

Like all the volumes belonging to the series entitled The Historical Guides to American Authors, this collection of critical essays on Henry James is both “interdisciplinary” and “historically sensitive,” and combines close attention to one of the most widely read and studied American authors with a “strong sense of time, place, and history,” and a focus on issues that can still be considered as contemporary. It is indeed tantalizing to realize, as the co-editors write, that “James’s populari..

Antideuteron production in proton-proton and proton-nucleus collisions

The experimental data of the antideuteron production in proton-proton and proton-nucleus collisions are analyzed within a simple model based on the diagrammatic approach to the coalescence model. This model is shown to be able to reproduce most of existing data without any additional parameter.Comment: To appear in Eur. Phys. J A (2002

A model for A=3 antinuclei production in proton-nucleus collisions

A simple coalescence model based on the same diagrammatic approach of antimatter production in hadronic collisions as used previously for antideuterons is used here for the hadroproduction of mass 3 antinuclei. It is shown that the model is able to reproduce the existing experimental data on Tbar and 3hebar production without any additional parameter.Comment: 7 figures. submitted to Eur. Phys. J.

Parameterization of the antiproton inclusive production cross section on nuclei

A new parameterization of the antiproton inclusive production cross section in proton-proton and proton-nucleus collisions is proposed. A sample of consistent pA->pbar X$ experimental data sets measured on 1<A<208 nuclei, from 12 GeV up to 400 GeV incident energy, have been used to constrain the parameters. A broader energy domain is covered for the pp->pbar X reaction with a simplified functional form used in the fits. The agreement obtained with the data is good. The results are discussed.Comment: 10 pages, 11 figures, 7 tables, submitted to Phys. Rev.

Synthesis of substituted tetrahydroisoquinolines by lithiation then electrophilic quench

Substituted N-tert-butoxycarbonyl (Boc)-1,2,3,4-tetrahydroisoquinolines were prepared and treated with n-butyllithium in THF at −50 °C to test the scope of the metallation and electrophilic quench. The lithiation was optimised by using in situ ReactIR spectroscopy and the rate of rotation of the carbamate was determined. The 1-lithiated intermediates could be trapped with a variety of electrophiles to give good yields of 1-substituted tetrahydroisoquinoline products. Treatment with acid or reduction with LiAlH4 allows conversion to the N–H or N–Me compound. The chemistry was applied to the efficient total syntheses of the alkaloids (±)-crispine A and (±)-dysoxyline

Lauric Guillaud. La Terreur et le sacré : la nuit gothique américaine.

Michel Houdiard est un éditeur qui se spécialise dans la publication d’ouvrages originaux, du domaine anglophone entre autres et américain en particulier. Le livre récent de Lauric Guillaud, spécialiste des paralittératures et du romanesque d’aventure, ne fait pas exception. Joliment sous-titré « la nuit gothique américaine » ‑ en souvenir de la nuit américaine de Truffaut ? ‑ son livre témoigne d’un envers du décor, en posant l’espace américain de l’imaginaire sombre ; cet imaginaire est à l..