MTA-SZTE Research Group on Artificial Intelligence
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Interface Engineering of Fe-Loaded ZnO Nanostructures via Wet Impregnation and Hydrothermal Routes for Enhanced CO Selectivity in CO2 Photoreduction
Full text linkThis study reports the synthesis of iron-doped zinc oxide nanocomposites (ZnO-FeOx) via two distinct methods, hydrothermal (HT) and wet impregnation (WI), for photocatalytic CO2 reduction under both visible light (VLI) and ultraviolet irradiation (UVI) light irradiation. The (HT) approach yielded a doped solid solution, whereas the (WI) method produced a heterosystem with well-defined interfaces. The ZnO-FeOx heterosystem demonstrated exceptional performance, achieving 99.99% selectivity for CO production with yields of 0.15 µmol g-1 min-1 (UVI) and 0.03 µmol g-1 min-1 (VLI). In comparison, the hydrothermally synthesized catalyst produced CO at yields of 0.042 µmol g-1 min-1 (UVI) and 0.006 µmol g-1 min-1 (VLI) with 94% selectivity. These results correspond to an approximately sevenfold enhancement for the WI-synthesized catalyst and a twofold improvement for the (HT) synthesized material relative to pristine ZnO. Combined surface analysis and DFT calculations showed that iron incorporation generates interfacial impurity states that facilitate a unique charge-transfer pathway, enhancing CO2 photoreduction. DRIFTS confirmed formate and carbonyl species as key intermediates in the reaction mechanism
Promising, but Not Completely Conclusive—The Effect of l-Theanine on Cognitive Performance Based on the Systematic Review and Meta-Analysis of Randomized Placebo-Controlled Clinical Trials
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Quantifying seepage dynamics in a real-scale levee using time-lapse 3D ERT and novel spatiotemporal metrics
Full text linkThe Noise of Our Daily Motion: General Spectral Characteristics of Human Mobility and Activity
Full text linkIn recent decades, a strong focus has emerged on exploring the scale-independent nature of our daily spatial motion. Similarly, heavy-tailed distributions have been observed for human locomotor activity, measured by actigraphs in medical fields. We recently proved that the raw acceleration data and also the activity signals calculated from them in diverse ways exhibit a general spectral characteristic; 1/f noise is observable above a certain cutoff frequency, while white noise and peaks corresponding to daily rhythms are visible at lower frequencies. We show that this pattern is strikingly similar to what we found earlier for GPS data and this similarity raises fundamental questions like what is the relation between human mobility and physical activity, what are the benefits of the analysis from this perspective, and how it helps us to better understand and model the scale-independent nature of human dynamics
Philosophical Reflections on the Significance of Preservation : Erich Hatala Matthes — What to Save and Why: Identity, Authenticity, and the Ethics of Conservation
Full text linkA systematic review of guinea fowl diversity and its economic, socio-cultural and ecological significance in Africa
Full text linkAortic Valve Annular Features in Acromegaly—A Detailed Three-Dimensional Speckle-Tracking Echocardiographic Analysis from the MAGYAR-Path Study
Full text linkBackground: Acromegaly, typically caused by growth hormone (GH)-secreting pituitary adenomas, leads to chronic GH and insulin-like growth factor-1 overproduction, resulting in significant cardiovascular complications, including left ventricular (LV) hypertrophy, myocardial fibrosis, diastolic/systolic LV dysfunction, and frequent valvular disease. Although aortic root dilation has been documented, the morphology and function of the aortic valve annulus (AVA) and its relationship with LV performance remain unexplored. Methods: The present study comprised a total of 31 patients with acromegaly, from which eight subjects were excluded due to inferior image quality. The remaining group of acromegalics consisted of 23 cases (mean age: 54.3 ± 14.5 years, 6 males). Their results were compared to 31 age- and gender-matched healthy subjects (mean age: 50.0 ± 7.4 years, 9 males). Cardiac assessment involved routine two-dimensional Doppler echocardiography and three-dimensional speckle-tracking echocardiography (3DSTE) to quantify basal regional and global longitudinal strains. Detailed planimetric measurements of AVA dimensions and its spatial displacement, called AVA plane systolic excursion (AAPSE), were also obtained. Results: Among 12 patients with inactive acromegaly, 7 patients (58%) showed larger end-systolic AVA area (AVA-A), while 5 patients (42%) had larger end-diastolic AVA-A. Among the 11 patients with active acromegaly, 3 patients (27%) had larger end-systolic AVA-A and 5 patients (45%) had larger end-diastolic AVA-A, while in 3 patients (27%) end-systolic and end-diastolic AVA-A proved to be equal. All end-systolic and end-diastolic AVA dimensions were tendentiously greater in acromegaly, with more pronounced values seen in the presence of an active disease. AAPSE was reduced both in all acromegaly patients and in those with active disease compared to controls. From LV strains, basal and global LV longitudinal strain (LS) and basal LV circumferential strain (CS) were similar when comparing acromegaly patients and those with active and inactive disorder to controls. However, basal and global LV-LS tended to be reduced, while basal LV-CS tended to be increased. Significantly increased global LV-CS were present in active acromegaly patients compared to inactive acromegaly patients and controls Conclusions: Significant aortic valve annular dilation is present in acromegaly, which is associated with its reduced spatial systolic displacement
