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Université de Fribourg

Reversible formation of gold nanoparticle–surfactant composite assemblies for the preparation of concentrated colloidal solutions

Shalkevich, Natallia ; Shalkevich, Andrey ; Si-Ahmed, Lynda ; Bürgi, Thomas

In: Physical Chemistry Chemical Physics, 2009, vol. 11, p. 10175-10179

We have developed a simple method for the preparation of nearly mono-dispersed stable gold colloids with a fairly high concentration using a two step procedure. First we synthesize citrate capped gold nanoparticles and then exchange the citrate ions with triethyleneglycolmono-11-mercaptoundecylether (EGMUDE). This leads to the immediate precipitation and formation of composite assemblies. The...

Université de Fribourg

Review: current international research into cellulose nanofibres and nanocomposites

Eichhorn, S. J. ; Dufresne, A. ; Aranguren, M. ; Marcovich, N. E. ; Capadona, J. R. ; Rowan, S. J. ; Weder, Christoph ; Thielemans, W. ; Roman, M. ; Renneckar, S. ; Gindl, W. ; Veigel, S. ; Keckes, J. ; Yano, H. ; Abe, K. ; Nogi, M. ; Nakagaito, A. N. ; Mangalam, A. ; Simonsen, J. ; Benight, A. S. ; Bismarck, A. ; Berglund, L. A. ; Peijs, T.

In: Journal of Materials Science, 2010, vol. 45, no. 1, p. 1-33

This paper provides an overview of recent progress made in the area of cellulose nanofibre-based nanocomposites. An introduction into the methods used to isolate cellulose nanofibres (nanowhiskers, nanofibrils) is given, with details of their structure. Following this, the article is split into sections dealing with processing and characterisation of cellulose nanocomposites and new developments...

Consortium of Swiss Academic Libraries

Review: Hegel's Theory of Imagination

Dorsch, Fabian

In: The British Journal of Aesthetics, 2005, vol. 45, no. 3, p. 309-311

Université de Fribourg

A review of causal mediation analysis for assessing direct and indirect treatment effects

Huber, Martin

(Working Papers SES ; 500)

Mediation analysis aims at evaluating the causal mechanisms through which a treatment or intervention affects an outcome of interest. The goal is to disentangle the total treatment effect into an indirect effect operating through one or several observed intermediate variables, the so-called mediators, as well as a direct effect reflecting any impact not captured by the observed mediator(s)....

Université de Fribourg

Review of emerging japanese encephalitis virus: new aspects and concepts about entry into the brain and inter-cellular spreading

Filgueira, Luis ; Lannes, Nils

In: Pathogens, 2019, vol. 8, no. 3, p. 111

Japanese encephalitis virus (JEV) is an emerging flavivirus of the Asia-Pacific region. More than two billion people live in endemic or epidemic areas and are at risk of infection. Recently, the first autochthonous human case was recorded in Africa, and infected birds have been found in Europe. JEV may spread even further to other continents. The first section of this review covers...

Université de Fribourg

Review of José Alvarez's The Impact of International Organizations on International Law

Besson, Samantha

In: European Journal of International Law, 2019, vol. 30, no. 1, p. 344-349

Université de Fribourg

A review of studies dealing with tree rings and rockfall activity : the role of dendrogeomorphology in natural hazard research

Stoffel, Markus

In: Natural Hazards, 2006, vol. 39, no. 1, p. 51-70

Over the last few years, rockfall research has increasingly focused on hazard assessment and risk analysis. Input data on past rockfall activity were gathered from historical archives and lichenometric studies or were obtained through frequency– volume statistics. However, historical records are generally scarce, and lichenometry may only yield data with relatively low resolutions. On...