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Št. zadetkov: 6
Chemical exchange rate study by NMR CPMG method
Aleš Mohorič, Janez Stepišnik
Izvirni znanstveni članek
Oznake: jedrska magnetna resonanca;nuclear magnetic resonance;
Analysis of the NMR CPMG method is presented that enables direct sampling of the spectral-density function of the chemical exchange processes. The approach is demonstrated on a solution of sucrose in water. The result confirms that the method can provide insight into the details of the dynamics of m ...
Leto: 2023 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Insight into details of chemical exchange kinetics studied by NMR CPMG method
Janez Stepišnik, Aleš Mohorič
Izvirni znanstveni članek
Oznake: jedrska magnetna resonanca;nuclear magnetic resonance;
A more detailed insight into the chemical kinetics and dynamics of chemical exchanges within a molecule or between molecules in liquids is made possible by the NMR CPMG method, which, in addition to the exchange rate, gives its power spectrum, which contains information about the underlying processe ...
Leto: 2024 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Diffusion spectrum of polymer melt measured by varying magnetic field gradient pulse width in PGSE NMR
Aleš Mohorič, Gojmir Lahajnar, Janez Stepišnik
Izvirni znanstveni članek
Oznake: jedrska magnetna resonanca;difuzija;taline polimerov;metoda PGSE;nuclear magnetic resonance;diffusion;polymer melts;PGSE method;
The translational motion of polymers is a complex process and has a big impact on polymer structure and chemical reactivity. The process can be described by the segment velocity autocorrelation function or its diffusion spectrum, which exhibit several characteristic features depending on the observa ...
Leto: 2020 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Molecular self-diffusion in internal magnetic fields of porous medium investigated by NMR MGSE method
Janez Stepišnik, Ioan Ardelean, Aleš Mohorič
Izvirni znanstveni članek
Oznake: jedrska magnetna resonanca;metoda MGSE;magnetno polje;magnetna susceptibilnost;lastna difuzija;porozne snovi;nuclear magnetic resonance;MGSE method;magnetic field;magnetic susceptibility;self-diffusion;porous media;
Inhomogeneous magnetic fields generated in porous media due to differences in magnetic susceptibility at solid/liquid interfaces and due to intrinsic or artificially doped magnetic impurities can be used to gain insight into the molecular dynamics of fluid in the structure of a porous medium using t ...
Leto: 2021 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Molecular velocity auto-correlations in glycerol/water mixtures studied by NMR MGSE method
Janez Stepišnik, Carlos Mattea, Siegfried Stapf, Aleš Mohorič
Izvirni znanstveni članek
Oznake: molekulska dinamika;jedrska magnetna resonanca;metoda MGSE;molecular dynamics;nuclear magnetic resonance;MGSE method;
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 sh ...
Leto: 2020 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Razumevanje tehniških pojmov trdota in trdnost med učenci od 6. do 8. razreda osnovne šole
Jure Stepišnik, Janez Jamšek, Stanislav Avsec
Diplomsko delo
Oznake: trdota;trdnost;konstruiranje;
Razumevanje tehniških pojmov trdota in trdnost med učenci od 6. do 8. razreda osnovne šole
Leto: 2011 Vir: Pedagoška fakulteta (UL PEF)
Št. zadetkov: 6
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