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Kinetics of reformation of the S state capable of progressing to the S state after the O release by photosystem II.
Photosynth Res
January 2025
Department of Chemistry, Graduate School of Science and Technology, Proteo-Science Research Center, Ehime University, Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan.
The active site for water oxidation in photosystem II (PSII) comprises a MnCaO cluster adjacent to a redox-active tyrosine residue (Tyr). During the water-splitting process, the enzyme transitions through five sequential oxidation states (S to S), with O evolution occurring during the STyr· to STyr transition. Chloride also plays a role in this mechanism.
View Article and Find Full Text PDFNonclinical and clinical characterization of the absorption, metabolism, and excretion of islatravir.
Antimicrob Agents Chemother
January 2025
Merck & Co., Inc, Rahway, New Jersey, USA.
The development of new and improved antiretroviral therapies that allow for alternative dosing schedules is needed for people living with HIV-1. Islatravir is a deoxyadenosine analog in development for the treatment of HIV-1 that suppresses HIV-1 replication via multiple mechanisms of action, including reverse transcriptase translocation inhibition and delayed chain termination. Islatravir is differentiated from other HIV-1 antiretrovirals by its high potency, long , broad tissue distribution, and favorable drug resistance profile.
View Article and Find Full Text PDFBmi-1 plays an important role in preventing bone aging by regulating the bone microenvironment.
Int J Clin Exp Pathol
December 2024
School of Stomatology, Hunan University of Medicine No. 492 Jinxi South Road, Huaihua 418000, Hunan, China.
Background: B-cell specific Moloney MLV insertion site-1 (Bmi-1) belongs to the polycomb group (PcG) gene and is a transcriptional suppressor to maintain appropriate gene expression patterns during development. To investigate whether the Bmi-1 gene has a corrective effect on bone senescence induced in Bmi-1 mice through regulating the bone microenvironment.
Methods: Littermate heterozygous male and female mice (Bmi-1) were used in this study.
Surface modification of AISI 316L stainless steel by applying single and multilayer coatings: Study of elastic modulus and antibacterial properties.
Heliyon
January 2025
Department of Materials Engineering, Babol Noshirvani University of Technology, Mazandaran, Iran.
AISI 316L stainless steel is extensively used in various fields, including medicine. In this study, in order to improve antibacterial properties, reduce elastic modulus, increase hydrophilicity and delay corrosion on the surface of AISI 316L stainless steel pieces for biomedical applications, zinc and magnesium elements were used for coating. Zn monolayer, Zn-Mg bilayer, and Zn-Mg-Zn triple coatings were deposited on AISI 316L substrates using the thermal evaporation method.
View Article and Find Full Text PDFEvaluation of Four Methods to Determine the Degree of Cure of Melamine-Based Direct Pressed Laminates on Particleboards: Two Improved UV Absorption Methods, the Kiton Test, and Near Infrared Spectroscopy.
Materials (Basel)
December 2024
Fraunhofer WKI, 38108 Braunschweig, Germany.
Despite its importance, the determination of the degree of cure of melamine-based laminates often relies on tests with limited accuracy and validity. Undercured surfaces may suffer insufficient resistance to scratching and heat as well as substandard surface quality. Overcured melamine surfaces tend to crack and entail the inefficient utilization of the press-the panels could have been pressed for a shorter time.
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