Janez Stepišnik (Avtor), Carlos Mattea (Avtor), Siegfried Stapf (Avtor), Aleš Mohorič (Avtor)

Povzetek

Molecular dynamics in binary mixtures of water and glycerol was studied by measuring the spectrum of water velocity auto-correlation in the frequency range from 0.05 − 10 kHz by using the NMR method of modulated gradient spin echo. The method shows that the diversity of diffusion signature in the short spin trajectories provides information about heterogeneity of molecular motion due to the motion in the micro-vortexes of hydrodynamic fluctuation, which is especially pronounced for the mixtures with low glycerol content. As concentration of glycerol increases above 10vol%, a new feature of spectrum appears due to interaction of water molecules with the clusters formed around hydrophilic glycerol molecules. New spectrum exposes a rate thickening of molecular friction, according to Einstein–Smoluchowski–Kubo formula, which inhibits rapid molecular motions and creates the conditions for a slow process of spontaneously folding of disordered poly-peptides into biologically active protein molecules when immersed in such a mixture.

Ključne besede

molekulska dinamika;jedrska magnetna resonanca;metoda MGSE;molecular dynamics;nuclear magnetic resonance;MGSE method;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FMF - Fakulteta za matematiko in fiziko
UDK: 543.429.23
COBISS: 19363843 Povezava se bo odprla v novem oknu
ISSN: 0378-4371
Št. ogledov: 96
Št. prenosov: 42
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: molekulska dinamika;jedrska magnetna resonanca;metoda MGSE;
Vrsta dela (COBISS): Članek v reviji
Strani: 12 str.
Letnik: ǂVol. ǂ553
Zvezek: ǂart. no. ǂ124171
Čas izdaje: Sep. 2020
DOI: 10.1016/j.physa.2020.124171
ID: 15776740