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New Insights into the Hydrogen Evolution Mechanism near the Ni/YSZ Triple Phase Boundary during Steam Electrolysis: A Patterned Model Electrode Study.
ACS Electrochem
March 2025
Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria.
Solid oxide cell technologies play a crucial role in climate change mitigation by enabling the reversible storage of renewable energy. Understanding the electrochemical high-temperature reaction mechanisms and the catalytic role of the electrode and electrolyte materials is essential for advancing power-to-H technologies. Despite its significance, limited spectroscopic research focusing on nickel and yttria-stabilized zirconia (Ni/YSZ) is available.
View Article and Find Full Text PDFComparison of reprojected 'pseudoplanar' bone SPECT/CT and planar bone scintigraphy for the detection and localization of foot and ankle osteoarthritis.
Nucl Med Commun
March 2025
Department of Nuclear Medicine and Radiology, Lucerne University Teaching and Research Hospital, Lucerne, Switzerland.
Purpose: To compare the performance of pseudoplanar (PP) images reprojected from bone single photon emission computed tomography/computed tomography (SPECT/CT) against 'real' planar bone scintigraphy for the assessment of localization and grading of radiotracer uptake of active osteoarthritic joints in the foot and ankle. Noninferiority of PP images would shorten the protocol substantially.
Methods: Late-phase real planar (RP) and SPECT/CT reconstructed PP images of 96 feet in 48 patients (22 women, 26 men, median age: 49 years, interquartile range: 34-67 years) with foot and ankle osteoarthritis were independently evaluated by three different readers.
DFT investigation of 5-fluorouracil tautomerism and non-covalent interactions with PLGA nanoparticles for enhanced drug delivery and sensing.
Spectrochim Acta A Mol Biomol Spectrosc
February 2025
INTERRA, School of Technology, Universidad de Extremadura, Cáceres 10003, Spain. Electronic address:
This study investigates the non-covalent interactions between both the free and tautomeric forms of 5-fluorouracil (5-FU) and poly(lactic-co-glycolic acid) (PLGA) nanoparticles through density functional dispersion correction (DFT-D) at the B3LYP-D level in a dichloromethane (DCM) and water environments. Our results indicate that the non-covalent interactions formed between the carbonyl and amide groups of the free form of 5-FU and the carboxyl group of PLGA facilitate a rapid initial release of the drug, aligning with experimental findings. The calculated binding energies for 5-FU in its keto-enol (-0.
View Article and Find Full Text PDFCharacterization of heatwave pattern and its long-run predictions using CMIP6 model in western and north-western climatic zones of Bangladesh.
Environ Sci Pollut Res Int
March 2025
Department of Geology and Mining, University of Rajshahi, Rajshahi, 6205, Bangladesh.
Heatwaves, characterized by prolonged high temperatures, have become a recurrent and severe phenomenon in Bangladesh, posing significant risks to public health, agriculture, and socioeconomic stability. This study analyzed the characterization and long-term projections of heatwave patterns in Bangladesh's western and northwestern climatic zones, addressing a critical gap in understanding regional vulnerabilities to extreme temperature events. Heatwave thresholds were defined using the Bangladesh Meteorological Department Criterion, a percentile-based criterion, and the Indian Meteorological Department Criterion, providing a comprehensive framework for assessing heatwave intensity and frequency.
View Article and Find Full Text PDFInherent loss of parahydrogen-induced polarization for systems with magnetically equivalent nuclei in magnetic field cycling experiments.
J Chem Phys
March 2025
International Tomography Center SB RAS, Novosibirsk, Russian Federation.
In the present work, we elucidate the inherent loss of net magnetization (⟨Iz⟩) in parahydrogen-induced polarization (PHIP) experiments with magnetic field cycling (MFC) for spin systems containing magnetically equivalent protons. The effects are shown for propane and diethyl ether as representative examples of potential hyperpolarized MRI contrast agents, but the findings of this work are equally applicable to other multispin systems in the liquid or gas phase. These results are relevant to both adiabatic longitudinal transport after dissociation engenders net alignment (ALTADENA) experiments (where 1H nuclei are polarized) and MFC protocols used to transfer parahydrogen spin order to a heteronucleus such as 13C.
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