Nature of the Active Center for the Oxygen Reduction on Ag-Based Single-Atom Alloy Clusters.

The development of alternative alloy catalysts with high activity, surpassing platinum group metals, for the oxygen reduction reaction (ORR) is urgently needed in the field of electrocatalysis. The Ag-based single-atom alloy (AgSAA) cluster has been proposed as a promising catalyst for the ORR; however, enhancing its activity under operational conditions remains challenging due to limited insights into its actual active site. Here, we demonstrate that the operando formation of the MO (OH) complex serves as the key active site for catalyzing the ORR over AgSAA cluster catalysts, as revealed through comprehensive neural network potential molecular dynamics simulations combined with first-principles calculations.

Crystal-Phase Engineering in Heterogeneous Catalysis.

The performance of a chemical reaction is critically dependent on the electronic and/or geometric structures of a material in heterogeneous catalysis. Over the past century, the Sabatier principle has already provided a conceptual framework for optimal catalyst design by adjusting the electronic structure of the catalytic material via a change in composition. Beyond composition, it is essential to recognize that the geometric atomic structures of a catalyst, encompassing terraces, edges, steps, kinks, and corners, have a substantial impact on the activity and selectivity of a chemical reaction.

[Use a leaflet flap of foot to severed multi-finger with segmental injury].

Objective: To explore asurgical methods for replantation of severed finger.

Methods: From January 2018 to November 2022, 8 amputated-finger patients were performed surgical reconstructions by using polyfoliate free flaps with the first dorsal metatarsal artery, including 7 males and 1 female, aged from 20 to 55 years old, and defect areas ranged from (1.0 to 2.

Protective effects of gallocatechin gallate against ultraviolet B induced skin damages in hairless mice.

Epigallocatechin gallate (EGCG) has the effect to protect skin from ultraviolet B (UVB) induced damages, but it is unstable under ambient conditions, being susceptible to become brown in color. Gallocatechin gallate (GCG), an epimer counterpart of EGCG, is more stable chemically than EGCG. The potential effects of GCG against UVB-induced skin damages has not been available.

Compatibility of Photoluminescence Properties in ScPO₄:Eu, Tb Phosphor for White Light Emitting Diodes.

ScPO₄:Eu, Tb phosphors with tuned emission color were prepared through high temperature solid-state reaction. The structure, morphology and photoluminescence properties of the title samples were collected by XRD, SEM and fluorescence spectrophotometer, respectively. Co-doping Eu and Tb in ScPO₄ does not change the body-centered tetragonal structure of the host.

The Treatment of Mid-shaft Clavicle Fractures.

Objective: Through reviewing the relevant literature from the past decades, to summarize the assessment and management of fractures of the clavicle, and provide an overview of the clinical results of a range of treatment options.

Data Sources: The data analyzed in this review are mainly from articles included in PubMed and EMBASE, published from 1960 to 2015.

Study Selection: Studies involving assessment of fractures of the clavicle were reviewed.