Jet-cooked papermaking starches studied using 1H NMR-relaxometry and viscometry
نویسندگان
چکیده
منابع مشابه
Slow dynamics in a liquid crystal: 1H and 19F NMR relaxometry.
Spin-lattice relaxation rates (R(1H) and R(1F)) of two nuclear species ((1)H and (19)F) are measured at different temperatures in the isotropic phase of a liquid crystal (4(')-butoxy-3(')-fluoro-4-isothiocyanatotolane-4OFTOL), over a wide range of Larmor frequency (10 kHz-50 MHz). Their dispersion profiles are found to be qualitatively very different, and the R(1F) in particular shows significa...
متن کاملInfluence of silica fume on the microstructure of cement pastes: New insights from 1H NMR relaxometry
a r t i c l e i n f o Keywords: 1 H NMR (B) Silica fume (D) C–S–H composition (B) Density (B) 1 H NMR has been used to characterise white Portland cement paste incorporating 10 wt.% of silica fume. Samples were measured sealed throughout the hydration without sample drying. Paste compositions and C–S–H characteristics are calculated based on 1 H NMR signal intensities and relaxation analysis. T...
متن کاملField-cycling NMR relaxometry with spatial selection.
Fast field-cycling MRI offers access to sources of endogenous information not available from conventional fixed-field imagers. One example is the T(1) dispersion curve: a plot of T(1) versus field strength. We present a pulse sequence that combines saturation-recovery/inversion-recovery T(1) determination with field cycling and point-resolved spectroscopy localization, enabling the measurement ...
متن کاملReorientations Mediated by Translational Displacements in Confined Liquid Crystals Studied by Field Cycling NMR Relaxometry and Monte Carlo Simulations
Ordering effects and low-frequency molecular dynamics in the nematic liquid crystals confined in mesoscopic pores was studied with the help of field cycling (FC) Nuclear Magnetic Resonance (NMR) relaxometry and Monte Carlo simulations. Proton relaxation rates were measured above the bulk isotropisation temperature in the broad frequency range between 2 kHz and 7 MHz. The average pore radii of c...
متن کاملThermotropic Phase Transition in Aqueous Polymer Solutions and Gels as Studied by 1h Nmr Methods
*Jiří SPĚVÁČEK, **Lenka HANYKOVÁ, **Larisa STAROVOYTOVA, ** Michal ILAVSKÝ *Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic, tel. +420-2-20403380, E-mail: [email protected] **Charles University, Faculty of Mathematics and Physics, V Holešovičkách 2, 180 00 Prague 8, Czech Republic, tel. +420-2-21912368, E-mail: [email protected]...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nordic Pulp & Paper Research Journal
سال: 2020
ISSN: 2000-0669,0283-2631
DOI: 10.1515/npprj-2019-0092