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Comparative Study of Crucial Properties of Packaging Based on Polylactide and Selected Essential Oils
No full textIn order to establish the differences in packaging containing various essential oils, polylactide (PLA)-based polymeric films incorporating poly(ethylene glycol) (PEG), clove (C), grapefruit (G), rosemary (R), and tea tree (T) essential oils were obtained and subsequently analyzed. In addition to examining structure and morphology, the polymer films underwent analyses that are particularly important with regard to contact with food. Mechanical and antioxidant properties, water vapor transmission rate (WVTR), and analysis of barrier properties against ultraviolet (UV) radiation, as well as the migration of ingredients into food simulants such as 10% v/v solutions of ethanol, 3% w/v acetic acid solution, and isooctane, were among the critical studies conducted. A comparison of the properties of the obtained materials allowed us to establish that the incorporation of essential oils significantly increases elongation at break and enhances UV barrier properties. In the case of materials containing clove oil and tea tree oil, a reduction in WVTR of about 1 g/m²/h was observed. The migration of the ingredients present in the films filled with clove oil, grapefruit oil, and tea tree oil into the acetic acid solution did not exceed 10 mg/kg, which is an acceptable value according to the European Union restrictions. Taking into account all of the studied properties, it should be stressed that the most promising packaging material is the film filled with clove oil
Rotation effect of a fissile nucleus (ROT effect) for prompt γ-rays in binary fission of U by polarized neutrons of different energies
No full textThis article describes a series of studies on the effect of the rotation of the fissile U nucleus in the U(n,f) process induced by monochromatic polarized neutrons with energies of 62 meV and 270 meV. The studied effect is expressed as a shift in the anisotropic angular distribution of γ-rays emitted by excited fission fragments by a small angle relative to the deformation axis of the fissile nucleus when the neutron beam polarization direction is reversed. All measurements were performed at the Heinz Mayer-Leibniz research neutron source (FRM II reactor) of the Munich Technical University in Garching on the polarized neutron beam of the POLI instrument. To generalize all results obtained on ROT effects for fission γ-rays, the results of earlier studies by the ITEP group for cold neutrons are re-processed, and the result obtained by the PNPI group for thermal neutrons is also presented
Macro-level implications of the energy system transition to net-zero carbon emissions: Identifying quick wins amid short-term constraints
No full textCorrelative Characterizations Reveal the Structure‐Bonding‐Property Relationship at a Local Scale
No full textReal-world evidence for altered communication patterns in individuals with autism spectrum disorder
No full textThe Value of Multidisciplinary Neuro-oncological Tumor Boards to Increase the Accuracy of FET PET for Identifying Brain Tumor Relapse
No full textAn External, Independent Validation of an O -(2-[ 18 F]Fluoroethyl)-l-Tyrosine PET Automatic Segmentation Network on a Single-Center, Prospective Dataset of Patients with Glioblastoma
No full textAdolescent maturation of cortical excitation-inhibition ratio based on individualized biophysical network modeling
No full textThe excitation-inhibition ratio is a key functional property of cortical microcircuits which changes throughout an individual’s lifespan. Adolescence is considered a critical period for maturation of excitation-inhibition ratio. This has primarily been observed in animal studies. However, there is limited human in vivo evidence for maturation of excitation-inhibition ratio at the individual level. Here, we developed an individualized in vivo marker of regional excitation-inhibition ratio in human adolescents, estimated using large-scale simulations of biophysical network models fitted to resting-state functional imaging data from both cross-sectional (n = 752) and longitudinal (n = 149) cohorts. In both datasets, we found a widespread decrease in excitation-inhibition ratio in association areas, paralleled by an increase or lack of change in sensorimotor areas. This developmental pattern was aligned with multiscale markers of sensorimotor-association differentiation. Although our main findings were robust across alternative modeling configurations, we observed local variations, highlighting the importance of methodological choices for future studies
