Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Rikard Bergman"'
Publikováno v:
Journal of Molecular Structure. 972:92-98
The slow dynamics of some hydrogen bonded glass-forming liquids has been investigated by broadband dielectric spectroscopy. We show that the polyalcohols glycerol, xylitol, and sorbitol, and mixtures of glycerol and water, and in fact, even pure wate
Publikováno v:
The European Physical Journal Special Topics. 141:53-56
The dynamics of supercooled confined water has recently been shown to have a pronounced, apparent fragile-to-strong transition (FST). Here we use broadband dielectric spectroscopy (10 -2 -10 9 Hz) to study the dynamics of water confined in silica mat
Publikováno v:
Journal of Non-Crystalline Solids. 352:4410-4416
We have investigated the dynamics of a protein (hemoglobin) in three different solvents by broadband dielectric spectroscopy and quasi-elastic neutron scattering (QENS). The solvents used were water, glycerol and methanol. From the dielectric measure
Publikováno v:
The Journal of Physical Chemistry B. 109:24134-24141
We present results obtained by dielectric spectroscopy in wide frequency (10(-2)-10(9) Hz) and temperature ranges on human hemoglobin in the three different solvents water, glycerol, and methanol, at a solvent level of 0.8 g of solvent/g of protein.
Publikováno v:
Journal of Non-Crystalline Solids. 351:2858-2863
We present dielectric and calorimetric results on solutions of glucose, fructose and sucrose over wide frequency and temperature ranges. For all the samples the dielectric data exhibits two clear relaxation processes with different temperature depend
Publikováno v:
The Journal of Physical Chemistry B. 108:11596-11603
Broadband dielectric spectroscopy (10-2−109 Hz) and temperature-modulated differential scanning calorimetry have been performed to study the molecular dynamics of monomer, dimer, and trimer of propylene glycol mono methyl ether (PGME) confined in a
Publikováno v:
Europhysics Letters (EPL). 64:675-681
We present results from dielectric spectroscopy on four molecular glass-formers, both in bulk and in confined geometry. For systems exhibiting a well-resolved secondary (β) relaxation, the confinement induces a relative enhancement (compared to the
Publikováno v:
The European Physical Journal B - Condensed Matter. 36:349-357
Photon correlation data of the molecular glass-forming materials 2-picoline, dimethylphthalate (DMP) and salol are compared with their dielectric loss spectra in the time-frequency range where the dielectric data reveal secondary relaxations. Slow se
Publikováno v:
Europhysics Letters (EPL). 64:358-363
Dielectric loss spectra of propylene carbonate in bulk and dissolved in a polymer matrix are investigated with focus on the currently debated excess wing. The spatial restrictions caused by the polymer matrix slow down the main structural (α) relaxa
Publikováno v:
Langmuir. 19:5072-5077
Bacterial cellulose (BC) gels produced by Acetobacter xylinum were used as model substrates for studying xylan assembly. The assembly of xylan onto BC surfaces was carried out by exposing BC films ...