The widely studied water oxidation catalyst [Ru(tpy)(L)(OH)] (tpy = 2,2':6',2''-terpyridine, L = bpy = 2,2'-bipyridine or L = bpm = 2,2'-bipyrimidine) is still under scrutiny. Here we present a new suggestion for one of the key steps, results that could resolve conflicting interpretations of experimental results. Instead of the previously proposed Ru[double bond, length as m-dash]O species, a proposed key species in water oxidation catalysis, we propose that the third oxidation of Ru could lead to a RuN-oxide, via rapid water coordination followed by oxidation and concerted N-O bond formation.
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http://dx.doi.org/10.1039/c7cc03041j | DOI Listing |
J Dent Sci
December 2024
School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
Background/purpose: High gold (Au) alloys have many advantages, such as good mechanical properties and stable chemical properties for dental restoration. The purpose of this investigation was to investigate the effect of zirconia (ZrO)-magnesia (MgO)-based investment combined with an argon arc vacuum pressure (Ar-arc VP) casting process on the recasting of high Au alloys.
Materials And Methods: The recasting Au alloys were compared between the control group of conventional SiO-based investment/horizontal centrifugal (HC) casting and the experimental group of ZrO-MgO-based investment/Ar-arc VP die casting.
Int J Cardiol Heart Vasc
February 2025
Department of Geriatrics, Peking University Third Hospital, Beijing 100191, PR China.
Background: Ferroptosis is a cell death process that depends on iron and reactive oxygen species. It significantly contributes to cardiovascular diseases. However, its exact role in ischemic cardiomyopathy (ICM) is still unclear.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
Department of Endocrinology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China. Electronic address:
Polysaccharides are the major bioactive composition of Polygonatum sibiricum (P. sibiricum). However, the structural and functional identifications of these polysaccharides were still limited.
View Article and Find Full Text PDFAdv Sci (Weinh)
January 2025
School of Life Sciences, Chongqing University, Chongqing, 401331, China.
The diverse and dynamic population of microorganisms present in the gut microbiota may affect host health. There are evidences to support the role of gut microbiota as a key player in reproductive development. Unfortunately, the relationship between reproductive disorders caused by aging and gut microbiota remains largely unknown.
View Article and Find Full Text PDFMikrochim Acta
January 2025
College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
An innovative colorimetric sensing strategy was developed for the detection of glucose by the integration of glucose aptamer, glucose oxidase (GOx), and horseradish peroxidase (HRP), termed aptamer proximal enzyme cascade reactions (APECR). In the presence of glucose, aptamer binding enables GOx to catalyze glucose oxidation into HO efficiently. Subsequently, the adjacent HRP catalyzes the oxidation of the peroxidase substrate, 2,2'-biazobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), utilizing the generated HO, resulting in a distinct color change.
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