Centrifugation

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Synthesis and Properties of Highly-Charged Cationic Polyelectrolytes

Polyelectrolytes (PEL) and PEL complexes formed by electrostatic interaction are recognized as compounds with a remarkable potential for a wide field of applications. However, comprehensive knowledge about electrostatic and structural influences on the pol ...

EPFL2013

A scalable synthesis of highly stable and water dispersible Ag-44(SR)(30) nanoclusters

Francesco Stellacci

We report the synthesis of atomically monodisperse thiol-protected silver nanoclusters Ag-44(SR)(30), (SR = 5-mercapto-2-nitrobenzoic acid) in which the product nanocluster is highly stable in contrast to previous preparation methods. The method is on ...

Royal Society of Chemistry2013

Determination of nanoparticle size distribution together with density or molecular weight by 2D analytical ultracentrifugation

Francesco Stellacci, Randy Patrick Carney, Jiwon Kim

Nanoparticles are finding many research and industrial applications, yet their characterization remains a challenge. Their cores are often polydisperse and coated by a stabilizing shell that varies in size and composition. No single technique can character ...

Nature Research2011

Refractive-index and density matching in concentrated particle suspensions: a review

Christophe Ancey, Nicolas Andreini, Gaël Epely Chauvin, Sébastien Wiederseiner

Optical measurement techniques such as particle image velocimetry (PIV) and laser Doppler velocimetry (LDV) are now routinely used in experimental fluid mechanics to investigate pure fluids or dilute suspensions. For highly concentrated particle suspension ...

Springer-Verlag2011

Analytical ultracentrifugation to support the development of biomaterials and biomedical devices

Jeffrey Alan Hubbell, Jutta Christine Wandrey, Conlin O'Neil, Urara Hasegawa

Analytical ultracentrifugation (AUC) primarily serves to investigate hydrodynamic and thermodynamic properties of natural and synthetic macromolecules and colloids in solution, dispersion or suspension. Beside such more conventional use, AUC can support ma ...

2011

Aqueous solution self-assembly of polystyrene-b-poly(L-lysine) diblock oligomers

Harm-Anton Klok, Harald Nuhn

This paper reports on the dilute, aqueous solution self-assembly of two asymmetric polystyrene-b-poly(L-lysine) (PSnPKm) diblock oligomers with PS and PK number-average degrees of polymerization of eight, respectively, 40 and 60. The self-assembly of these ...

2011

Extracellular matrix binding mixed micelles for drug delivery applications

Jeffrey Alan Hubbell, Davide Demurtas, Jutta Christine Wandrey

Received 5 January 2009 Accepted 22 March 2009 Available online 27 March 2009 Keywords: Mixed micelles Drug delivery Block copolymers Sirolimus Extracellular matrix We present the formation of collagen-binding mixed micelles and their potential suitability ...

2009

A new class of isothiocyanate-based irreversible inhibitors of macrophage migration inhibitory factor

Hilal Lashuel, Bruno Claude Daniel Fauvet, Magdalena Zweckstetter, Hajer Ouertatani-Sakouhi, Farah El Turk

Macrophage migration inhibitory factor (MIF) is a homotrimeric multifunctional proinflammatory cytokine that has been implicated in the pathogenesis of several inflammatory and autoimmune diseases. Current therapeutic strategies for targeting MIF focus on ...

American Chemical Society2009

Particle Size Distribution Measurements of Manganese-Doped ZnS Nanoparticles

Heinrich Hofmann, Alke Fink

We performed particle size and particle size distribution measurements for L-cysteine-stabilized ZnS/Mn nanoparticles in the size region below 10 nm. For this we applied transmission electron microscopy (TEM), analytical ultracentrifugation (AUC), dynamic ...

2009

Extraction of haemoglobin from human blood by affinity precipitation using a haptoglobin-based stimuli-responsive affinity macroligand

Gisela Stocker Majd

Affinity precipitation was compared to affinity chromatography and batch adsorption as the final purification step in a protocol for the isolation of haemoglobin from human blood. Haptoglobin was the affinity ligand. The first steps on the process were rea ...

2008

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Determination of nanoparticle size distribution together with density or molecular weight by 2D analytical ultracentrifugation

Francesco Stellacci, Randy Patrick Carney, Jiwon Kim

Nature Research2011

Analytical ultracentrifugation to support the development of biomaterials and biomedical devices

Jeffrey Alan Hubbell, Jutta Christine Wandrey, Conlin O'Neil, Urara Hasegawa

2011

Aqueous solution self-assembly of polystyrene-b-poly(L-lysine) diblock oligomers

Harm-Anton Klok, Harald Nuhn

2011

Extraction of haemoglobin from human blood by affinity precipitation using a haptoglobin-based stimuli-responsive affinity macroligand

Gisela Stocker Majd

2008