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Heterogeneity of Ne...
Heterogeneity of Network Structures and Water Dynamics in κ-Carrageenan Gels Probed by Nanoparticle Diffusometry
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- De Kort, Daan W. (författare)
- Wageningen University and Research,Wageningen University, The Netherlands; TI-COAST, The Netherlands
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- Schuster, E. (författare)
- RISE,Jordbruk och livsmedel
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- Hoeben, Freek J.M. (författare)
- SyMO-Chem B.V.,TI-COAST, The Netherlands; SyMO-Chem B.V, The Netherlands
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- Barnes, Ryan (författare)
- University of California,University of California, USA
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- Emondts, Meike (författare)
- University of California,University of California, USA
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- Janssen, Henk M. (författare)
- SyMO-Chem B.V.,TI-COAST, The Netherlands; SyMO-Chem B.V, The Netherlands
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- Lorén, Niklas, 1970 (författare)
- RISE,Jordbruk och livsmedel
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- Han, Songi (författare)
- University of California,University of California, USA
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- Van As, Henk (författare)
- Wageningen University and Research,Wageningen University, The Netherlands; TI-COAST, The Netherlands
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- Van Duynhoven, John P.M. (författare)
- Unilever,Wageningen University and Research,Wageningen University, The Netherlands; TI-COAST, The Netherlands ; Unilever R&D, The Netherlands
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(creator_code:org_t)
- 2018-08-22
- 2018
- Engelska.
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Ingår i: Langmuir. - : American Chemical Society (ACS). - 1520-5827 .- 0743-7463. ; 34:37, s. 11110-11120
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Abstract
Ämnesord
Stäng
- A set of functionalized nanoparticles (PEGylated dendrimers, d = 2.8-11 nm) was used to probe the structural heterogeneity in Na+/K+ induced κ-carrageenan gels. The self-diffusion behavior of these nanoparticles as observed by 1H pulsed-field gradient NMR, fluorescence recovery after photobleaching, and raster image correlation spectroscopy revealed a fast and a slow component, pointing toward microstructural heterogeneity in the gel network. The self-diffusion behavior of the faster nanoparticles could be modeled with obstruction by a coarse network (average mesh size <100 nm), while the slower-diffusing nanoparticles are trapped in a dense network (lower mesh size limit of 4.6 nm). Overhauser dynamic nuclear polarization-enhanced NMR relaxometry revealed a reduced local solvent water diffusivity near 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO)-labeled nanoparticles trapped in the dense network, showing that heterogeneity in the physical network is also reflected in heterogeneous self-diffusivity of water. The observed heterogeneity in mesh sizes and in water self-diffusivity is of interest for understanding and modeling of transport through and release of solutes from heterogeneous biopolymer gels.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
- NATURVETENSKAP -- Biologi -- Biofysik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biophysics (hsv//eng)
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De Kort, Daan W.
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Schuster, E.
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Hoeben, Freek J. ...
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Barnes, Ryan
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Emondts, Meike
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Janssen, Henk M.
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Lorén, Niklas, 1 ...
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Han, Songi
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Van As, Henk
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Van Duynhoven, J ...
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Fysikalisk kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Annan kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Biologi
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och Biofysik
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Chalmers tekniska högskola
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