We report the results of comprehensive studies of the piezo-optic and elasto-optic effects in lithium tetraborate crystals, LiBO. The full matrices of piezo-optic and elasto-optic coefficients are obtained using a recently developed method based on four-point bending. On this basis, we have estimated the acousto-optic figure of merit for LiBO.
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http://dx.doi.org/10.1364/AO.55.010457 | DOI Listing |
Luminescence
January 2025
Vlokh Institute of Physical Optics, Ivan Franko National University of Lviv, Lviv, Ukraine.
Spectroscopic properties of Tb-doped and Tb-Ag codoped lithium tetraborate (LTB) glasses with LiBO (or LiO-2BO) composition are investigated and analysed using electron paramagnetic resonance (EPR), optical absorption, photoluminescence (PL) and photoluminescence excitation (PLE) spectra, PL decay kinetics and absolute quantum yield (QY) measurements. PL spectra of the investigated glasses show numerous narrow emission bands corresponding to the D → F (J = 6-0) and D → F (J = 5-3) transitions of Tb (4f) ions. The most intense PL band of Tb ions at 541 nm (D → F transition) is characterised by a lifetime slightly exceeding 2.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University, Maslak, Istanbul, Turkey. Electronic address:
Foam-based wound dressing materials produced by dispersing gas phases in a polymeric material are soft, adapt to the body shape, and allow the absorption of wound exudate due to their porous structure. Most of these formulations are based on synthetic substances such as polyurethane. However, biopolymers have entered the field as a new player thanks to their biocompatible and sustainable nature.
View Article and Find Full Text PDFJ Diabetes Metab Disord
December 2024
Department of Traditional Medicine, School of Persian Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Objectives: To evaluate the effectiveness of a Persian Medicine herbal formula and a Traditional Chinese Medicine intervention (acupuncture) on the improvement of weight and anthropometric indices of overweight patients.
Methods: This study was a randomized placebo-controlled double-blind clinical trial. A total of 200 overweight patients were randomly divided into 4 groups receiving either (1) Herbal capsule, (2) placebo capsule, (3) acupuncture, or (4) sham acupuncture.
Int J Mol Sci
November 2024
Department of Pharmaceutical Chemistry, Medical University of Gdańsk, 80-416 Gdańsk, Poland.
The measurement of selected norepinephrine metabolites, such as 3,4-dihydroxyphenylglycol (DHPG), 3-methoxy-4-hydroxyphenylethylenglycol (MHPG), and vanillylmandelic acid (VMA), in biological matrices-including urine-is of great clinical importance for the diagnosis and monitoring of diseases. This fact has forced researchers to evaluate new analytical methodologies for their isolation and preconcentration from biological samples. In this study, the three most popular extraction techniques-liquid-liquid extraction (LLE), solid-phase extraction (SPE), and a new 3D-printed system for dispersive solid-phase extraction (3D-DSPE)-were investigated.
View Article and Find Full Text PDFPest Manag Sci
November 2024
Department of Biotechnology, University of Verona, Verona, Italy.
Background: The brown marmorated stink bug Halyomorpha halys has become an invasive insect pest of many crops. A promising control strategy to manage the proliferation of H. halys is based on the suppression of its obligate and vertically transmitted uncultivated symbiotic bacterium Candidatus Pantoea carbekii through surface-sterilization of H.
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