Počet záznamů: 1
MRI Study of Liesegang Patterns: Mass Transport and Banded Inorganic Phase Formation in Gel
- 1.0480410 - ÚPT 2018 RIV DE eng J - Článek v odborném periodiku
Klanicová, N. - Malá, Aneta - Macíček, Ondřej - Zeman, J. - Starčuk jr., Zenon
MRI Study of Liesegang Patterns: Mass Transport and Banded Inorganic Phase Formation in Gel.
Applied Magnetic Resonance. Roč. 48, č. 6 (2017), s. 545-557. ISSN 0937-9347. E-ISSN 1613-7507
Grant CEP: GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01
Institucionální podpora: RVO:68081731
Klíčová slova: precipitation processes * chemical-reaction * electric-field * reaction front
Obor OECD: Biophysics
Impakt faktor: 0.835, rok: 2017
A new non-optic method for the study of Liesegang patterns was tested. Liesegang patterns are periodically banded precipitates produced by the reaction-diffusion process, mostly occurring in geology. The Liesegang experiment (5.5 M NH4OH, gelatin matrix with 0.4 M MgSO4) was monitored using a 9.4 T magnetic resonance imaging (MRI) system, allowing the acquisition of sample images in any location and orientation without interfering with the process studied. The development of patterns in a gel matrix was observed for 7 days after starting the reaction. Qualitative data (T-2- and T-2*-weighted images) and quantitative T (2) maps were acquired. Preliminary experiments show that MRI is able to distinguish the regions between the precipitated bands and the structural changes in the gel matrix during the reaction. A damaged gel matrix was measured to reveal the effect of the initial reagent-gel contact area. MRI study of Liesegang patterns provides empirical data which can be used in theoretical model testing.
Trvalý link: http://hdl.handle.net/11104/0276192
Počet záznamů: 1