A5027139655- Photosynthetic Processes and Mechanisms
- Spectroscopy and Quantum Chemical Studies
- Nuclear Physics and Applications
- Plant Stress Responses and Tolerance
- Physics of Superconductivity and Magnetism
- Quantum, superfluid, helium dynamics
- Photoreceptor and optogenetics research
- Enzyme Structure and Function
- Lipid Membrane Structure and Behavior
- Catalytic Processes in Materials Science
- High-pressure geophysics and materials
- Rare-earth and actinide compounds
- Protein Structure and Dynamics
- Magnetic properties of thin films
- Mass Spectrometry Techniques and Applications
- Fuel Cells and Related Materials
- Atomic and Subatomic Physics Research
- RNA Research and Splicing
- Hydrocarbon exploration and reservoir analysis
- Gold and Silver Nanoparticles Synthesis and Applications
- Magnetic and Electromagnetic Effects
- TiO2 Photocatalysis and Solar Cells
- Copper-based nanomaterials and applications
- Phase Equilibria and Thermodynamics
- Nanomaterials for catalytic reactions
Oak Ridge National Laboratory
2020-2025
HUN-REN Centre for Energy Research
2015-2024
Spallation Neutron Source
2024
Paul Scherrer Institute
2013-2021
HUN-REN Wigner Research Centre for Physics
2014-2021
Institute for Solid State Physics and Optics
2011-2021
European Spallation Source
2018-2021
National Technical Information Service
2021
Hungarian Research Network
2021
Office of Scientific and Technical Information
2021
Uniquely in Cu2OSeO3, the Skyrmions, which are topologically protected magnetic spin vortex-like objects, display a magnetoelectric coupling and can be manipulated by externally applied electric (E) fields. Here, we explore E-field to Skyrmion lattice phase, study response using neutron scattering. Giant induced rotations of achieved that span range $\sim$25$^{\circ}$. Supporting calculations show an E-field-induced distortion lies behind rotation. Overall, present new approach control makes...
Abstract The functions of biomolecular condensates are thought to be influenced by their material properties, and these will determined the internal organization molecules within condensates. However, structural characterizations challenging, rarely reported. Here, we deploy a combination small angle neutron scattering, fluorescence recovery after photobleaching, coarse-grained molecular dynamics simulations provide descriptions model that formed macromolecules from nucleolar granular...
Abstract In natural habitats, plants frequently experience rapid changes in the intensity of sunlight. To cope with these and maximize growth, adjust photosynthetic light utilization electron transport photoprotective mechanisms. This involves a proton motive force (PMF) across thylakoid membrane, postulated to be affected by unknown anion (Cl − ) channels. Here we report that bestrophin-like protein from Arabidopsis thaliana functions as voltage-dependent Cl channel electrophysiological...
Significance Oxygenic photosynthesis regulates light–energy conversion by balancing the activity of two photosystems (PSs). Such a power balance requires sophisticated regulatory mechanism called state transitions, which involve reversible phosphorylation light-harvesting complex proteins (LHCIIs) to redistribute absorbed excitation energy between photosystems. Using noninvasive techniques (small-angle neutron scattering, circular dichroism, and absorption transient spectroscopy) in green...
An overview is provided of the 15 neutron beam instruments making up initial instrument suite European Spallation Source (ESS), and being made available to user community. The ESS source consists a high-power accelerator target station, providing unique long-pulse time structure slow neutrons. design considerations behind structure, moderator geometry layout are presented. 15-instrument two small-angle instruments, reflectometers, an imaging beamline, single-crystal diffractometers; one for...
Summary The Arabidopsis phosphate transporter PHT 4;1 was previously localized to the chloroplast thylakoid membrane. Here we investigated physiological consequences of absence for photosynthesis and plant growth. In standard growth conditions, two independent knockout mutant lines displayed significantly reduced leaf size biomass but normal phosphorus content. When mutants were grown in high‐phosphate levels increased phenotype suppressed. Photosynthetic measurements indicated that stromal...
In the present study, we determined characteristic repeat distances of photosynthetic membranes in living cyanobacterial and eukaryotic algal cells, intact thylakoid isolated from higher plants with time-resolved small-angle neutron scattering. This non-invasive technique reveals light-induced reversible reorganizations seconds-to-minutes time scale, which appear to be associated functional changes vivo.
The assembled state of nanoparticles (NPs) within porous matrices plays a governing role in directing their biological, electronic, and catalytic properties. However, the effects spatial confinement environmental factors, such as salinity, on NP assemblies pores are poorly understood. In this study, we use adsorption isotherms, spectrophotometry, small-angle neutron scattering to develop better understanding effect performance gold (Au) NPs propylamine-functionalized SBA-15 MCM-41 mesoporous...
Ergosterol, found in fungi and some protist membranes, is understudied compared with cholesterol from animal membranes. Generally, ergosterol assumed to modulate membranes the same manner as cholesterol, based on their similar chemical structures. Here we reveal fundamental structural dynamical differences between them. Neutron diffraction shows that embedded lipid bilayer much shallower than cholesterol. Ergosterol does not change membrane thickness does, indicating little condensation...
NPM1 is an abundant nucleolar chaperone that, in addition to facilitating ribosome biogenesis, contributes stress responses and tumor suppression through its regulation of the p14 Alternative Reading Frame suppressor protein (p14ARF). Oncogenic induces p14ARF inhibit MDM2, stabilize p53 arrest cell cycle. Under non-stress conditions, stabilizes nucleoli, preventing degradation blocking activation. However, mechanisms underlying by are unclear because structural features p14ARF-NPM1 complex...
Abstract Investigating the effects of drought stress and subsequent recovery on structure function chloroplasts is essential to understanding how plants adapt environmental stressors. We investigated Ctenanthe setosa (Roscoe) Eichler, an ornamental plant that can tolerate prolonged periods (40 49 days water withdrawal). Conventional biochemical, biophysical, physiological (ultra)structural methods combined for first time in a higher with vivo small‐angle neutron scattering (SANS) were used...
Micelles formed by novel gemini esterquat surfactants have been investigated with small-angle neutron scattering (SANS). The growth behavior of the micelles is found to differ conspicuously depending on length surfactant spacer group. a long form rather small triaxial ellipsoidal tablet-shaped that grow weakly concentration in entire range measured concentrations. Geminis short spacer, other hand, growing oblates or tablets at low concentrations start much more strongly into polydisperse...
The proton exchange membrane (PEM) is a key element of polymer electrolyte fuel cell, and radiation-grafting an attractive option for the synthesis PEMs. Via systematic investigation well-defined model material, sulfonated polystyrene grafted poly(ethylene-alt-tetrafluoroethylene), ETFE-g-PS(SA), we show that performance stability radiation-grafted PEMs in cells strongly depends on microstructure underlying base polymer. nanoscale structure polymers, films, membranes probed by small-angle...
Heavy-metal contaminations in natural waters, wetlands and wastewaters pose serious threats to aquatic ecosystems - mainly via targeting microalgae. In this work, we investigated the effects of toxic amounts chromium cadmium ions on structure function photosynthetic machinery Chlorella variabilis cells. To halt propagation cells, used high concentrations Cd Cr, 50-50 mg L-1, forms CdCl2 x 2.5 H2O K2Cr2O7, respectively. Both treatments led similar, about 50% gradual diminishment chlorophyll...
The adsorption of nonionic surfactants onto hydrophilic nanoparticles (NPs) is anticipated to increase their stability in aqueous medium. While show salinity- and temperature-dependent bulk phase behavior water, the effects these two solvent parameters on surfactant self-assembly NPs are poorly understood. In this study, we combine isotherms, dispersion transmittance, small-angle neutron scattering (SANS) investigate salinity temperature pentaethylene glycol monododecyl ether (C12E5) silica...
Intrinsically disordered late embryogenesis abundant (LEA) proteins play a central role in the tolerance of plants and other organisms to dehydration brought upon, for example, by freezing temperatures, high salt concentration, drought or desiccation, many LEA have been found stabilize dehydration-sensitive cellular structures. Their conformational ensembles are highly sensitive environment, allowing them undergo changes adopt ordered secondary quaternary structures participate formation...
PolyCarboxylate ether-based superplasticizers (PCEs) are a type of comb-shaped copolymers used as polymeric dispersants in cementitious materials. PCEs have high degree dispersity, which limits the suitability conventional characterization techniques, such Size Exclusion Chromatography (SEC). Properties strongly depend on their molecular structure and comprehensive is needed to fully understand structure⁻property relationships. with well-defined structures were synthesized study solution...
Selective oxidation of benzyl alcohol to benzaldehyde with molecular oxygen was studied over sol-derived alumina supported bimetallic Au-Ru and Au-Ir (nominal atomic ratio 1:1) respect Au, Ru Ir monometallic catalysts in both calcined subsequently reduced states without equimolar K2CO3 toluene at 80 °C. The Au after an induction period also samples had good activity selectivity the presence K2CO3, ones showed negligible activity. different pretreatments did not cause large difference...