Concept

Masse moléculaire

Publications associées (223)

Dispersion polymerization of methyl methacrylate in supercritical carbon dioxide: control of molecular weight distribution by adjusting particle surface area

Expts. of Me methacrylate dispersion polymn. are carried out in a reaction calorimeter using PDMS-mMA (methacrylate-terminated polydimethylsiloxane) as surfactant. Different stabilizer concns. from 0 to 10 wt% with respect to monomer have been considered i ...

2007

Conformational Changes and Aggregation of Alginic Acid as Determined By Fluorescence Correlation Spectroscopy

Marianne Seijo, Fabrice Avaltroni, Serge Stoll

Insight into the conformations and aggregation of alginic acid was gained by measuring its diffusion coefficient at very dilute concentrations using fluorescence correlation spectroscopy. Both the pH and ionic strength (I) had an important influence on the ...

American Chemical Society2007

Adsorption of Superplasticizers on a Model Powder

Paul Bowen, Yves Houst, François Perche

Adsorption isotherms of carboxylate type superplasticizers with different architectures have been measured on MgO considered as a non-reactive model powder. This system allowed us to study the influence of pH, electrolyte type, concentration and ionic stre ...

Conseil national de recherches du Canada2007

Measurement of the τ lepton mass and an upper limit on the mass difference between τ+ and τ-

Olivier Schneider, Aurelio Bay, Stewart Cole, Chao Wang, Tagir Aushev

The mass of the τ lepton has been measured in the decay mode τ→3πντ using a pseudomass technique. The result obtained from 414fb-1 of data collected with the Belle detector is Mτ=[1776.61±0. 13(stat)±0.35(sys)]MeV/c2. The upper limit on the relative mass d ...

2007

The thermal polymerization of amino acids revisited; Synthesis and structural characterization of hyperbranched polymers from L-lysine

Harm-Anton Klok, Markus Scholl

This contribution reports on the synthesis of hyperbranched polylysines via thermal polymerization of L-lysine hydrochloride. Polymerization of L-lysine hydrochloride in the presence of one equivalent KOH at 150°C resulted in polymers with a number-average ...

2007

Asymmetrical Flow Field Flow Fractionation–Multidetection System as a Tool for Studying Metal – Alginate Interaction

Enrica Alasonati

The present study explores the potential use of asymmetrical flow field flow fractionation (aFlFFF) with a multidetection system for the study of metal–alginate interactions. aFlFFF, coupled on-line to a differential refractive index and seven angle laser ...

2006

Polyelectrolyte complex formation at defined interfaces and structure formation in solution studied by analytical ultracentrifugation

Laurent Bourdillon

The interactions and structural formation of polyelectrolytes in solution and environmental stimuli-responsive water-soluble polymers are subjects of intense academic research, development, and application. An increasing number of novel materials are being ...

EPFL2006

A sensitive in vivo model for quantifying interstitial convective transport of injected macromolecules and nanoparticles

Melody Swartz, Sai Reddy

Effective interstitial transport of particles is necessary for injected drug/diagnostic agents to reach the intended target; however, quantitative methods to estimate such transport parameters are lacking. In this study we develop an in vivo model for eval ...

2006

Interaction forces and molecular adhesion between pre-adsorbed poly(ethylene imine) layers

Ramon Pericet Camara, Michal Borkovec

Interaction forces between pre-adsorbed layers of branched poly(ethylene imine) (PEI) of different molecular mass were studied with the colloidal probe technique, which is based on atomic force microscopy (AFM). During approach, the long-ranged forces betw ...

Elsevier2006

Molecular basis of RNA recognition by the human alternative splicing factor Fox-1

Luc Reymond

The Fox-1 protein regulates alternative splicing of tissue-specific exons by binding to GCAUG elements. Here, we report the soln. structure of the Fox-1 RNA binding domain (RBD) in complex with UGCAUGU. The last three nucleotides, UGU, are recognized in a ...

2006

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