A5086671099- Electron Spin Resonance Studies
- Solid-state spectroscopy and crystallography
- Antioxidant Activity and Oxidative Stress
- Advanced NMR Techniques and Applications
- Photochemistry and Electron Transfer Studies
- Spectroscopy and Quantum Chemical Studies
- Free Radicals and Antioxidants
- Electrochemical Analysis and Applications
- Glass properties and applications
- Glycosylation and Glycoproteins Research
- NMR spectroscopy and applications
- Magnetism in coordination complexes
- X-ray Diffraction in Crystallography
- Radiation Effects and Dosimetry
- Crystallization and Solubility Studies
- Phase-change materials and chalcogenides
- Atomic and Subatomic Physics Research
- Lanthanide and Transition Metal Complexes
- Metabolomics and Mass Spectrometry Studies
- Metal complexes synthesis and properties
- Electrochemical sensors and biosensors
- Protein Structure and Dynamics
- Conducting polymers and applications
- Magnetic and Electromagnetic Effects
- Microbial Inactivation Methods
Rudjer Boskovic Institute
2015-2024
University of Zagreb
1992-2000
Jožef Stefan Institute
1991
University of Ljubljana
1988-1991
Enlarging the quantum coherence times and gaining control over effects in real systems are fundamental for developing technologies. Molecular electron spin qubits particularly promising candidates realizing information processing due to their modularity tunability. Still, there is a constant search tools increase times. Here we present how mechanochemical introduction of active form 10% diluted copper(ii)-porphyrins diamagnetic PCN-223 MOF-525 zirconium-MOF polymorph pair can be achieved....
Abstract The NMR relaxation times T 2 , and 1 were measured in isolated rat lungs as functions of external magnetic field B 0 temperature, lung inflation. observed linear dependence on the tissue‐induced free induction decay rate ( ) −1 provides independent confirmation air/water interface model lung. Furthermore, measurements Larmor frequency are consistent with a spin‐lattice form 1/T l = A ω −1/2 + expected for case which arises from water‐biopolymer cross‐relaxation, should be...
The three-dimensional structure of the holo form recombinant cellular bovine heart fatty-acid-binding protein (H-FABPc), a polypeptide 133 amino acid residues with molecular mass 15 kDa, has been determined by multidimensional homonuclear and heteronuclear NMR spectroscopy applied to uniformly 15N-labeled unlabeled protein. A nearly complete set 1H 15N chemical shift assignments was obtained. total 2329 intramolecular distance constraints 42 side-chain chi 1 dihedral-angle were derived from...
In photosynthesis, final electron transfer from ferredoxin to NADP(+) is accomplished by the flavo enzyme ferredoxin:NADP(+) oxidoreductase (FNR). FNR recruited thylakoid membranes via integral membrane rhodanase-like protein TROL. We address fate of electrons downstream photosystem I when TROL absent. have employed paramagnetic resonance (EPR) spectroscopy study free radical formation and partitioning in TROL-depleted chloroplasts. DMPO was used detect superoxide anion (O2(.-)) formation,...
We present a generalized nuclear spin bath model for embedded electron decoherence in organic solids at low temperatures, which takes the crucial influence from hindered methyl group rotation tunneling into account. This new, quantum many body model, after resolved using cluster correlation expansion method, predicts profiles directly proton relative position and splitting inputs. Decoherence this explain adequately both strongly weakly groups to decoherence: The former accelerates by...
The electron spin-lattice relaxation of 2,2,6,6-tetramethyl-1-piperidine-1-oxyl and 4-oxo-2,2,6,6-tetramethyl-1-piperidine-1-oxyl was measured at temperatures between 5 80 K in crystalline glassy ethanol using $X$-band paramagnetic resonance spectroscopy. experimental data the lowest studied were explained terms electron-nuclear dipolar interaction center localized excitations, whereas higher low-frequency vibrational modes from host matrix Raman processes should be considered. strong impact...
Antioxidant activity of gangliosides GM1 and GT1b in the Fenton type reaction was investigated by EPR spectroscopy using DMPO as a spin trap. Hydroxyl radical adduct signal intensity significantly reduced presence at their micellar concentrations. Mean hydrodynamic diameter not changed, whereas significant changes negative Zeta potential values were observed evidenced Zetasizer Nano ZS. This study showed that primary mode ganglioside action due to direct scavenging OH·, but rather inhibition...
Recent studies have reported that exogenous gangliosides, the sialic acid-containing glycosphingolipids, are able to modulate many cellular functions. We examined effect of micelles mono- and trisialoganglioside GM1 GT1b on production reactive oxygen species by stimulated human polymorphonuclear neutrophils using different spectroscopic methods. The results indicated gangliosides did not influence extracellular superoxide anion (O₂·⁻) generation activated receptor-dependent...
In this article, we present the novel application of nuclear spin bath model and cluster correlation expansion method on studying matrix material structure via embedded electron decoherence. Profiles decoherence under Carr-Purcell-Meiboom-Gill dynamical decoupling pulse series in a system for organic solids (malonic acid) are calculated different structures. Resulting decay profiles exhibit strong to variations an adjacent proton environment among them. addition, behavior bath(s) is found be...
Abstract The reduction rates of different nitroxides in rat lung tissue were measured by electron paramagnetic resonance. We confirmed that the rate nitroxide spin probe molecules is coupled with their structure and transport characteristics. Oxygen was found to slow down tissues. On basis these findings it can be concluded most properties described for homogeneous systems—cells homogenates—are also valid heterogeneous systems, which important application as metabolically active NMR contrast...
Pulsed field gradient NMR measurements of rat lung tissue have shown that the apparent water self-diffusion coefficient is nearly an order magnitude smaller than free and moreover not constant but varies as inverse square root diffusion time. The mean displacement molecules similarly proportional to Possible origins this non-Brownian behavior are discussed.
$X$-band electron paramagnetic resonance spectroscopy was used to study the spectral properties of a nitroxide spin probe in ethanol glass and crystalline ethanol, at $5--11.5\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The different anisotropy molecular packing two host matrices evidenced by rigid limit values for maximal hyperfine splitting signal probe. significantly shorter phase memory time ${T}_{m}$ dissolved as compared glass, discussed terms contribution from diffusion. effect...