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Structural Characterization of the Platinum Nanoparticle Hydrogen-Evolving Catalyst Assembled on Photosystem I by Light-Driven Chemistry.
ACS Nano
January 2025
National Synchrotron Light source II, Brookhaven National Laboratory, Upton, New York 11973, United States.
Directed assembly of abiotic catalysts onto biological redox protein frameworks is of interest as an approach for the synthesis of biohybrid catalysts that combine features of both synthetic and biological materials. In this report, we provide a multiscale characterization of the platinum nanoparticle (NP) hydrogen-evolving catalysts that are assembled by light-driven reductive precipitation of platinum from an aqueous salt solution onto the photosystem I protein (PSI), isolated from cyanobacteria as trimeric PSI. The resulting PSI-NP assemblies were analyzed using a combination of X-ray energy-dispersive spectroscopy (XEDS), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), small-angle X-ray scattering (SAXS), and high-energy X-ray scattering with atomic pair distribution function (PDF) analyses.
View Article and Find Full Text PDFIntrahepatic portosystemic shunt: salvage mechanism for oligohydramnios complicating fetal growth restriction.
Ultrasound Obstet Gynecol
January 2025
Ultrasound Unit, Helen Schneider Hospital for Women, Rabin Medical Center, Beilinson Hospital, Petach Tikva, Israel.
Objective: Portosystemic shunts in growth-restricted fetuses are more common than previously thought. We aimed to describe fetuses with growth restriction and transient oligohydramnios in which a congenital intrahepatic portosystemic shunt (CIPSS) was noted during follow-up.
Methods: This was a retrospective study of all fetuses diagnosed with growth restriction and transient oligohydramnios during a 5-year period in a large tertiary referral center.
Cutaneous Leishmaniasis Masquerading as Diabetic Foot: A Call for Vigilance.
Acta Dermatovenerol Croat
November 2024
Khalid Al Aboud King Faisal Hospital P.O Box 5440, Makkah, Saudi Arabia;
parts of the world (1,2). CL is characterized by significant clinical variability. An ulcerated nodule on the exposed parts of the body (corresponding to the parasite inoculation site by the vector insect) is the classic presentation.
View Article and Find Full Text PDFPotential of right ventricular function assessment with echocardiography in transcatheter aortic valve replacement.
J Cardiothorac Surg
December 2024
Department of Cardiology, Thomas Jefferson University, Philadelphia, PA, 19107, USA.
Background: Right ventricular (RV) function assessment by echocardiography can be challenging due to its complex morphology. Also, increasing use of sedation rather than general anesthesia for transfemoral approach transcatheter aortic valve replacement (TAVR) reduces the need for intraoperative transesophageal echocardiography (TEE). Recent clinical studies have demonstrated the importance of 3-dimensional (3D) echocardiography and a longitudinal strain for RV function assessment.
View Article and Find Full Text PDFA new hernia blocking system to prevent recurrent lumbar disc herniation: surgical technique, intraoperative findings and six-months post-operative outcomes.
Eur Spine J
December 2024
Neurosurgery Department, Hospital Universitario de Canarias, La Laguna, Santa Cruz de Tenerife, Spain.
Purpose: The aim of this study was to evaluate the performance and safety of a new hernia blocking system (HBS), implanted after a limited discectomy, to prevent recurrence of lumbar disc herniation.
Methods: Prospective, multicenter (6 sites), cohort clinical investigation. Thirty patients with a postero-lateral disc herniation between L4-S1 and large annular defects (> 6 mm wide), who underwent a limited discectomy and were treated with a new HBS (DISC care, NEOS Surgery S.
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