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Molecular basis of vitamin K driven γ-carboxylation at membrane interface.
Nature
January 2025
Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO, USA.
The γ-carboxylation of glutamate residues enables Ca-mediated membrane assembly of protein complexes that support broad physiological functions including hemostasis, calcium homeostasis, immune response, and endocrine regulation. Modulating γ-carboxylation level provides prevalent treatments for hemorrhagic and thromboembolic diseases. This unique posttranslational modification requires vitamin K hydroquinone (KH) to drive highly demanding reactions catalyzed by the membrane-integrated γ-carboxylase (VKGC).
View Article and Find Full Text PDFReducing butter firmness with chemically esterified butter oil.
JDS Commun
January 2025
Department of Food Science and Technology, The Ohio State University, Columbus, OH 43210.
In a consumer-centric environment, food products are created and focused on the consumer's experience and desires. One important food product used around the world is butter. Consumers expect that when they take their butter out of the refrigerator, it will be able to spread nicely and evenly; however, with conventional butter, which does not include any added vegetable oils, achieving a soft, spreadable butter is rare.
View Article and Find Full Text PDFMetal-organic frameworks-derived CaO/ZnO composites as stable catalysts for biodiesel production from soybean oil at room temperature.
Sci Rep
January 2025
Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan, 81746-73441, Iran.
Biodiesel presents a sustainable alternative to fossil fuels, yet traditional homogeneous catalysts like sodium and potassium hydroxide face challenges with separation and reuse. Calcium oxide (CaO) is an effective heterogeneous catalyst for biodiesel production, but its chemical instability under reaction conditions restricts its long-term performance. This study introduces MOF-mediated synthesis (MOFMS) of heterogeneous catalysts, specifically CaO@ZnO and ZnO@CaO nanocomposites, from inexpensive and non-toxic metal salts and linkers in water.
View Article and Find Full Text PDFIn vitro evaluation of antimicrobial photodynamic therapy with photosensitizers and calcium hydroxide on bond strength, chemical composition, and sealing of glass-fiber posts to root dentin.
Lasers Med Sci
January 2025
Department of Preventive and Restorative Dentistry, Discipline of Endodontics, Araçatuba School of Dentistry, São Paulo State University - UNESP, Araçatuba, SP, Brazil.
Investigate the impact of antimicrobial photodynamic therapy (aPDT) using different photosensitizers (PSs) such as indocyanine green (IG), curcumin (CC), and methylene blue (MB), with or without intracanal application of calcium hydroxide (CH), on the push-out bond strength of glass-fiber posts (GFPs) to intraradicular dentin, the chemical composition of the root substrate, and the sealing of the adhesive interface across different thirds of intraradicular dentin. A total of 112 bovine teeth underwent biomechanical preparation and were divided into eight experimental groups (n = 14 each): Negative control with deionized water; positive control with deionized water + CH; IG group with indocyanine green and infrared laser; IG + CH group; CC group with curcumin and blue LED; CC + CH group; MB group with methylene blue and red laser; and MB + CH group. The push-out bond strength was measured using a universal testing machine (n = 8), and scanning electron microscopy characterized the fracture patterns.
View Article and Find Full Text PDFEffectiveness of Root Canal Irrigation and Dressing for the Treatment of Asymptomatic Apical Periodontitis: A Systematic Review Assessing Complementary Timeframes.
Aust Endod J
January 2025
Adelaide Dental School, University of Adelaide, Adelaide, Australia.
Sodium hypochlorite (NaOCl), ethylenediaminetetraacetic acid (EDTA), and calcium hydroxide (Ca(OH)) are used in root canal treatment. However, further research is needed to assess their effectiveness at time points not considered in previous guidelines. This review complements the systematic review by Rossi-Fedele and Rödig (2023) by considering time points excluded by the latter.
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