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Enhancing selectivity of β-O-4 bond cleavage for lignin depolymerization a sacrificial anode.
Chem Commun (Camb)
January 2025
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, 510640 Guangzhou, P. R. China.
Herein, we report a novel electrochemical hydrogenolysis method for β-O-4 bond cleavage by using carbon foam as the cathode and waste aluminum as the anode. The reaction takes place at the cathode, producing ketones and phenolic compounds. Employing waste aluminum as the anode could avoid anodic excessive oxidation of phenols.
View Article and Find Full Text PDFCapillary refill time paradoxically decreases in a blood loss shock model.
Intensive Care Med Exp
January 2025
Department of Emergency Medicine in Linköping, and Department of Biomedical and Clinical Sciences, Linköping University, 582 25, Linköping, Sweden.
Background: This study aimed to investigate whether changes in capillary refill (CR) time precede macrovascular signs of deterioration in a human model of blood loss shock. The study was conducted at the Department of Emergency Medicine in Linköping, Sweden, and involved 42 healthy volunteers aged 18-45. Participants were randomized into two provocations of applied lower body negative pressure (LBNP): a stepwise escalation protocol and a direct application protocol, to simulate gradual and acute blood loss.
View Article and Find Full Text PDFEnhancement of Differentiation and Mineralization of Human Dental Pulp Stem Cells via TGF-β Signaling in Low-Level Laser Therapy Using Er:YAG Lasers.
J Oral Biosci
January 2025
Department of Biochemistry and Molecular Biology, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan. Electronic address:
Objectives: Low-level laser therapy (LLLT) using an erbium-doped yttrium aluminum garnet (Er:YAG) laser provides a non-invasive approach applicable to various dental treatments. Here, we investigated the effects of Er:YAG laser irradiation on human dental pulp stem cells (hDPSCs) in an in vitro experiment.
Methods: The hDPSCs were categorized into four groups: laser-irradiated with activators (VLT: activated vitamin D, bone morphogenetic protein receptor inhibitor, and transforming growth factor-beta (TGF-β)) (LLLT(+)VLT), laser-irradiated without activators (LLLT(+)-only), non-irradiated with activators (LLLT(-)VLT), and non-irradiated without activators (control).
Selective production of olefins from methanol over a heteroatomic SAPO-34 zeolite.
Sci Bull (Beijing)
January 2025
Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK; College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China. Electronic address:
The methanol-to-olefins (MTO) process has the potential to bridge future gaps in the supply of sustainable lower olefins. Promoting the selectivity of propylene and ethylene and revealing the catalytic role of active sites are challenging goals in MTO reactions. Here, we report a novel heteroatomic silicoaluminophosphate (SAPO) zeolite, SAPO-34-Ta, which incorporates active tantalum(V) sites within the framework to afford an optimal distribution of acidity.
View Article and Find Full Text PDFValidity of quantitative values of quantitative light-induced fluorescent (QLF) device for pulp diagnosis of teeth with cracks.
J Dent
January 2025
Department of Conservative Dentistry, Dental and Life Science Institute, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Republic of Korea. Electronic address:
Introduction: The Quantitative Light-Induced Fluorescence (QLF) device provides both the visual information of crack lines on tooth surfaces and quantitative values for fluorescence reactions. The aim of this study was to evaluate the correlation and assess the usefulness of QLF quantitative values in pulp diagnosis of teeth with cracks.
Methods: Pulp diagnosis was performed on 76 teeth with cracks according to the American Association of Endodontics's guidelines, and their QLF images were captured.
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