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Hinged Carboxylate in the Artificial Distal Pocket of an Iron Porphyrin Enhances CO Electroreduction at Low Overpotential.
Adv Sci (Weinh)
January 2025
Université Paris-Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Orsay, 91400, France.
To efficiently capture, activate, and transform small molecules, metalloenzymes have evolved to integrate a well-organized pocket around the active metal center. Within this cavity, second coordination sphere functionalities are precisely positioned to optimize the rate, selectivity, and energy cost of catalytic reactions. Inspired by this strategy, an artificial distal pocket defined by a preorganized 3D strap is introduced on an iron-porphyrin catalyst (sc-Fe) for the CO-to-CO electrocatalytic reduction.
View Article and Find Full Text PDFAuto-collimation diffraction of two-dimensional metal-dielectric grating with azimuth angle of 45°.
Nanophotonics
January 2025
College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, Guangdong 510632, China.
Grating under auto-collimation configuration with polarization-independent high diffraction efficiency plays an important role in the displacement measurement system, spectral beam combining system and so on. In this paper, we proposed, for the first time, a reflective two-dimensional metal-dielectric grating of which the (-1, -1) order beam is diffracted back along the input light direction, when the incident azimuth angle is 45°. With optimized structure, the (-1, -1) order diffraction efficiencies of transverse electric polarization (TE) and transverse magnetic polarization (TM) are 95.
View Article and Find Full Text PDFNew horizons in smart plant sensors: key technologies, applications, and prospects.
Front Plant Sci
January 2025
Research Center for Agricultural Monitoring and Early Warning, Agricultural Information Institute of Chinese Academy of Agricultural Sciences, Beijing, China.
As the source of data acquisition, sensors provide basic data support for crop planting decision management and play a foundational role in developing smart planting. Accurate, stable, and deployable on-site sensors make intelligent monitoring of various planting scenarios possible. Recent breakthroughs in plant advanced sensors and the rapid development of intelligent manufacturing and artificial intelligence (AI) have driven sensors towards miniaturization, intelligence, and multi-modality.
View Article and Find Full Text PDFA single outer-sphere amino-acid substitution turns on the NO reactivity of a hemerythrin-like protein.
Chem Sci
January 2025
Department of Chemical Physiology and Biochemistry, School of Medicine, Oregon Health & Science University 3181 SW Sam Jackson Park Road Portland Oregon 97239 USA
Mycobacterial hemerythrin-like proteins (HLPs) are important for the survival of pathogens in macrophages. Their molecular mechanisms of function remain poorly defined but recent studies point to their possible role in nitric oxide (NO) scavenging. Unlike any nonheme diiron protein studied so far, the diferric HLP from (-HLP) reacts with NO in a multistep fashion to consume four NO molecules per diiron center.
View Article and Find Full Text PDFHemorrhoidal disease: what role can rectal artery embolization play?
Front Surg
January 2025
Interventional Radiology Section, Department of Medical Imaging, University Hospital Timone, APHM, Marseille, France.
Introduction: Hemorrhoidal artery embolization, also known as Emborrhoid, has emerged in recent years as a minimally invasive treatment option for patients with recurrent and unresponsive to medical therapies hemorrhoidal bleeding symptoms. We present here an overview of the profile of rectal artery embolization based on the most relevant and recent literature.
Methods: A comprehensive review of literature on Hemorrhoidal artery embolization, was conducted on PubMed-Medline.
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