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Kolmogorov Scaling in Turbulent 2D Bose-Einstein Condensates.
Phys Rev Lett
February 2025
National Institute of Standards and Technology, University of Maryland, Joint Quantum Institute, College Park, Maryland 20742, USA.
We investigated turbulence in 2D atomic Bose-Einstein condensates (BECs) using a minimally destructive, impurity injection technique analogous to particle image velocimetry in conventional fluids. Our approach transfers small regions of the BEC into a different hyperfine state and tracks their displacement, ultimately yielding the velocity field. This allows us to quantify turbulence in the same way as is conventional in fluid dynamics in terms of velocity-velocity correlation functions, called velocity structure functions, that obey Kolmogorov scaling laws.
View Article and Find Full Text PDFImportance: Down syndrome, resulting from trisomy 21, is the most prevalent chromosomal disorder and a leading cause of intellectual disability. Despite its significant impact on brain development, research on the white matter microstructure in infants with Down syndrome remains limited.
Objective: To investigate early white matter microstructure in infants with Down syndrome using diffusion tensor imaging (DTI) and neurite orientation dispersion and density imaging (NODDI).
Probing the Slow Relaxation of Magnetization of a Square Planar Cobalt Complex with Doublet Ground State.
Chem Asian J
March 2025
Indian Institute of Technology Bombay, Department of Chemistry, Powai, 400076, Mumbai, INDIA.
The observation of slow relaxation of magnetization in low-spin square planar cobalt complexes is exceedingly rare, likely due to the synthetic challenges of stabilizing such geometries, along with the complexities introduced by hyperfine interactions and spin-orbit coupling. Additionally, accurately characterizing the ground-state electronic configuration of these complexes remains a significant challenge. In this article, we report a unique and rare square planar cobalt complex, [Co((L1•-)2] (1), where the coordination sites are occupied by the phenanthroiminoquinone (L1).
View Article and Find Full Text PDFMössbauer Spectroscopy as a Valuable Analysis Technique in Biomedical Research.
Chimia (Aarau)
February 2025
Department of Chemical Engineering, Wolfson Centre for Sustainable Materials Processing and Development, Brunel University of London, Kingston Lane, Uxbridge, Middlesex UB8 3PH, UK.
Mössbauer spectroscopy is an effective technique used to examine the iron atom electronic environments in both biomolecular molecules and whole animal studies. Because of its sensitivity to nuclear hyperfine interactions, this technique yields incredibly accurate data regarding the electronic and magnetic states of nuclei, chemical bonds, and the local electronic environment structure around iron atoms. This review demonstrates how Mössbauer spectroscopy contributes to biomedical sciences.
View Article and Find Full Text PDFHydrogen Radical Chemistry at High-Symmetry {2Fe2S} Centers Probed Using a Muonium Surrogate.
Inorg Chem
March 2025
ISIS Facility, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science Campus, Didcot, Oxfordshire OX11 OQX, U.K.
Redox-active metal hydrides are of central importance in the development of novel hydrogen generation catalysts. Direct insight into open-shell hydrides is, however, difficult to obtain. One approach to gain this information is to use muonium (Mu = μ e) as a surrogate for the hydrogen radical.
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