A5090833650- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- X-ray Diffraction in Crystallography
- High-pressure geophysics and materials
- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Advanced NMR Techniques and Applications
- Geomagnetism and Paleomagnetism Studies
- Characterization and Applications of Magnetic Nanoparticles
- Phase-change materials and chalcogenides
- Photosynthetic Processes and Mechanisms
- Radiation Detection and Scintillator Technologies
- Infant Nutrition and Health
- Iron Metabolism and Disorders
- X-ray Spectroscopy and Fluorescence Analysis
- Protein Structure and Dynamics
- Biochemical and biochemical processes
- Boron Compounds in Chemistry
- Pigment Synthesis and Properties
- Enzyme Structure and Function
- Radiopharmaceutical Chemistry and Applications
- RNA Interference and Gene Delivery
- Proteins in Food Systems
- Theoretical and Computational Physics
- Neonatal Health and Biochemistry
Institute for Energy Technology
2018-2024
Norsk Hydro (Norway)
2024
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2011-2023
Joint Institute for Nuclear Research
2010-2021
Main features of the modernized small-angle neutron scattering spectrometer (YuMO) at IBR-2M pulsed reactor are described. New installations for sample environment highlighted. The SANS instrument is equipped with a new type position sensitive detector as well two system which provide unique dynamic range (Qmax/Qmin ratio about 90). Sample extended magnetic (magnetic field 2.5 Tesla), automated high pressure setup allows simultaneous and volumetric studies light illumination system. In...
The possibilities of calibrations by silver behenate [CH3(CH2)20COOAg] and stearate [CH3 (CH2)16CO2Ag] for the small angle scattering (SAS) technique are considered. It was shown that long-period spacing compounds allow us to check parameters time-of-flight (TOF) method. Results data obtained from neutron (SANS) measurements performed with powders presented compared X-ray (SAXS) measurements.
At the Radiopharmaceutical Research Center (CCR) of Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), we operate a TR-19 cyclotron radio isotope production. To broaden our spectrum radioisotopes with applications nuclear medicine, add new external beam line towards state-of-the-art solid target station. Besides practical experience implementation Comecer ALCEO metal targetry system, new, more efficient way tuning onto design dedicated neutron local...
Lactoferrin is a non-heme protein known for its ability to bind tightly Fe(III) ions in various physiological environments. Due this feature lactoferrin plays an important role the processes of iron regulation at cellular level preventing body from damages produced by high levels free ions. The X-ray crystal structure human shows that iron-binding process leads conformational changes within structure. present study was addressed conformation stability solution. Using molecular dynamics...
Many redox reactions are being catalyzed by oxidoreductase enzymes. Although they have high structural similarity, these enzymes undergo different reaction mechanisms and rates depending on the types of substrate, structure, protonation state. pharmaceutical food industry applications depend characterization elucidation mechanisms. Combined experimental studies with computational tools provided evidence isoalloxazine ring oxidoreductase’s flavin cofactor reacting through a step-wise process...
Abstract Magnetic and structural properties of (Co) x (SiO 2 ) 1 − nanocomposite systems have been investigated over a wide range Co concentrations using small‐angle neutron scattering in combination with magnetic, magneto‐optic, magneto‐transport characterization. It was found that the region percolation , characteristics magnetically correlated clusters are several times larger than size granules. Starting from point, spatial distribution magnetic nanoclusters can be described by surface...
The uptake of Fe(III) by living cells unicellular green algae Dunaliella salina ions is investigated. effects operational conditions such as contact time, biomass concentration, initial pH, and concentration on iron are studied. time profile the D. shows a lag in first 15 min, which associated with production metal chelating agents. In addition, it found that optimum pH for maximal 8. At optimal conditions, increasing gradually along increase concentration. Furthermore, increased rising ion...
SANS measurements using unpolarized neutron beams are able to provide quantitative information on the magnetic microstructure and magnitude of anisotropy nanomagnetic materials. A new system for at YUMO spectrometer is presented. The includes 2.5 T electromagnet established a two-axes goniometric table, power supply, cooling system, PC based control equipment. Main features are: changeable gap samples (up 130 mm size), computer controlled horizontal vertical rotation sufficiently big space...
The application of the time-gradient magnetic field neutron spin-echo technique (TGF-NSE) aiming to extend possibilities REFLEX reflectometer at pulsed reactor IBR-2 (Dubna, Russia) towards a high and medium resolution small-angle scattering is considered. This requires use linearly increasing in form sequence saw-teeth pulses. Such well-suited structure beam reactor. wide range wavelengths employed time-of-flight (TOF) operation mode allows for simultaneous coverage lengths (corresponding...
The design of a time-of-flight neutron reflectometer proposed for the new generation compact sources is presented. offers possibility to use spin-polarized neutrons. presented here takes advantage cold source and uses neutrons with wavelengths in range 2–15 Å unpolarized mode. In general, due tight spatial restrictions need avoid moving parts inside beam channel, multi-channel collimator guide reflective are used first section instrument. This enables definition desired wavelength band easy...
Here we combine small angle neutron scattering measurements (SANS) with X-ray diffraction analysis (XRD) and infrared spectroscopy (IR) to obtain information about nanoparticles formed in a series of lead-lead dioxide samples mixed various CuO concentrations. New vitreous systems the xCuO • (100−x)[4PbO2 Pb] composition where x = 0, 30, 70 mol% were prepared by melt-quenching method using suitable proportion active electrodes disassembled car battery as starting materials. The patterns...