Fluorine-fluorine interaction-driven colorimetric sensor for PFOA-sensitive detection using F-functionalized Ce-UiO-66-NH MOF with oxidase-like activity.

A novel colorimetric sensor was designed for sensitive perfluorooctanoic acid (PFOA) detection based on a fluorine-functionalized Ce-metal-organic framework (F-Ce-UiO-66-NH) with oxidase-like activity, using 3,3',5,5'-tetramethylbenzidine (TMB) as the chromogenic substrate. This F-Ce-UiO-66-NH was synthesized through ligand exchange and post-modification with pentafluorobenzaldehyde (PFBA) on the basis of Ce-terephthalic acid (Ce-UiO-66), incorporating pentafluorophenyl groups that enhance the material's affinity for PFOA, leading to a more sensitive absorbance change in the presence of PFOA. Experimental and computational assays revealed that oxidase-like activity of F-Ce-UiO-66-NH primarily arises from hydroxyl radicals (•OH) generated through the conversion of superoxide radicals (•O).

Purified components of red-edge tea polysaccharide alleviate food allergy in mice by regulating intestinal homeostasis.

Previous studies found red-edge tea polysaccharides (RETPS)-3 and 4 have anti-allergic effects. To investigate the anti-food allergy activity of the RETPS-3/4, the ovalbumin-induced Balb/c mouse food allergy model was established. Food allergy symptoms, serum inflammatory factors, spleen and intestinal pathology were analyzed.

POM-Based Hydrogels for Efficient Synergistic Chemodynamic/Low-Temperature Photothermal Antibacterial Therapy.

Bacterial infection of wound surfaces has posed a significant threat to human health and represents a formidable challenge in the clinical treatment. In this study, a novel antimicrobial hydrogel utilizing POM is synthesized as the primary component, with gelatin and sodium alginate as the structural framework. The resultant hydrogel demonstrates exceptional mechanical properties and viscoelasticity attributed to the hydrogen-bonded cross-linking between POM and gelatin, as well as the ionic cross-linking between sodium alginate and Ca.

Structural characterization and mast cell stabilizing activity of Red-edge tea polysaccharide.

The potential anti-allergic properties of tea have been demonstrated in studies supporting theanine and catechin. However, research on tea polysaccharides' anti-allergic properties has been limited. In this study, we extracted red-edge tea crude polysaccharide (RETPS) and evaluated its anti-allergic activity using the mast cell, passive cutaneous anaphylaxis, and passive systemic anaphylaxis models.

Hierarchical CoWO/NiFeS microspheres bearing crystalline-amorphous interface as a multifunctional platform for outperformed water splitting and sensitive hydrazine sensing.

Highly efficient and multifunctional electrocatalysts are of high value in energy transformation and electrochemical sensing. Herein, hierarchically architectured cobalt tungstate/nickel iron sulfide (CoWO/NiFeS) microspheres with a crystalline-amorphous interface have been prepared on bimetallic substrate of nickel-iron foam (NIF) by a two-step hydrothermal method. Electrochemical characterization shows that CoWO/NiFeS microspheres can boost the electrocatalytic activity effectively through the synergistic effect on the crystalline-amorphous interface.

Protein arginine methyltransferase 8 regulates ferroptosis and macrophage polarization in spinal cord injury via glial cell-derived neurotrophic factor.

Objective: To explore the influence of protein arginine methyltransferase 8 (PRMT8) regulating glial cell-derived neurotrophic factor (GDNF) on neuron ferroptosis and macrophage polarization in spinal cord injury (SCI).

Methods: A rat model of SCI was established through an injury induced by an external force. Basso, Beattie, and Bresnahan score, hematoxylin and eosin staining, and immunofluorescence were used, respectively, to detect changes in rat locomotion, spinal cord histopathology, and NeuN expression in the spinal cord.

Conditioned medium from bone marrow mesenchymal stem cells relieves spinal cord injury through suppression of Gal-3/NLRP3 and M1 microglia/macrophage polarization.

The therapeutic effects of bone marrow mesenchymal stem cells (BMSCs) and their conditioned media have been well-documented. This study focused on the effects of BMSC-conditioned medium (BMSCcm) on spinal cord injury (SCI). To study the effects of BMSCcm on rat motor function, inflammatory response, and M1/M2 macrophage/microglial polarization, SCI model rats were treated with BMSCcm and vectors for overexpression of galectin-3 (Gal-3) or NLR family pyrin domain containing 3 (NLRP3).

Single-Step Synthesis of Fe-Fe O Catalyst for Highly Efficient and Selective Electrochemical Nitrogen Reduction.

Nitrogen reduction electrocatalysts are highly attractive for catalytic science. However, most electrocatalysts are limited by their low faradaic efficiency, poor ammonia yield, and tedious and costly catalyst synthesis process. In this work, Fe-based oxide composite nanoparticles with steady chemical states are prepared by a single-step green procedure under ambient conditions.

Facilitative role of circPVT1 in osteogenic differentiation potentials of bone marrow mesenchymal stem cells from patients with osteoporosis through the miR-30d-5p/ITGB3 axis.

Objective: The critical role of circular RNAs (circRNAs) in osteoporosis (OP) has been highlighted. We tried to explore the role of circPVT1 in OP in relation to microRNA-30d-5p (miR-30d-5p) and ITGB3.

Methods: After bone marrow collection, bone marrow mesenchymal stem cells (BMSCs) were isolated and identified.

IL1RN promotes osteoblastic differentiation via interacting with ITGB3 in osteoporosis.

The occurrence and progress of osteoporosis (OP) are partially caused by impaired osteoblast differentiation. Interleukin-I receptor antagonist (IL1RN) is an immune modulatory molecule that commonly functions by means of competing the binding site of IL-1R with IL-1. Although it was recently reported that IL1RN is involved in osteoblast differentiation, the role of IL1RN in osteogenesis remains unclear.

Bonding interface boosts the intrinsic activity and durability of NiSe@FeO heterogeneous electrocatalyst for water oxidation.

The intrinsic activity and durability of oxygen evolution reaction (OER) electrocatalysts are mainly dominated by the surface and interface properties of active materials. Herein, a core-shell heterogeneous structure (NF/NiSe@FeO) is fabricated via two-step hydrothermal method, which exhibits a low overpotential of 220 mV (or 282 mV) at 10 mA/cm (or 200 mA/cm), a small Tafel slope of 36.9 mV/dec, and long-term stability (~230 h) in 1 mol/L KOH for OER.

A novel MoNi@Ni(OH) heterostructure with Pt-like and stable electrocatalytic activity for the hydrogen evolution reaction.

A novel Mo0.84Ni0.16@Ni(OH)2 heterostructure was successfully fabricated.

Coupling FeSe with CoSe: an effective strategy to create stable and efficient electrocatalysts for water oxidation.

A novel CoSe/FeSe2 nanohybrid electrocatalyst was prepared by a simple one-step hydrothermal method. Owing to the unique interface structure, abundant internal defects, good hydrophilia and electrical coupling effects between different components, the hybrid shows enhanced oxygen evolution reaction (OER) performances, better than those of the individual CoSe and FeSe2.

In situ growth of well-ordered NiFe-MOF-74 on Ni foam by Fe induction as an efficient and stable electrocatalyst for water oxidation.

Well-ordered NiFe-MOF-74 is in situ grown on Ni foam by the induction of Fe2+ and directly used as an OER electrocatalyst. Benefited from the intrinsic open porous structure of MOF-74, the in situ formed MOF arrays and the synergistic effect of Ni and Fe, outstanding water oxidation activity is obtained in alkaline electrolytes with an overpotential of 223 mV at 10 mA cm-2.

Selenization of NiMn-layered double hydroxide with enhanced electrocatalytic activity for oxygen evolution.

Exploiting highly active oxygen evolution reaction electrocatalysts is of great importance in the cost-effective generation of clean fuels. Herein, the preparation of NiMn-layered double hydroxide with selenization is adopted to reduce the charge transfer resistance of the electrocatalytic oxygen evolution reaction and enhance electrocatalytic performance. As a result, this selenization product of NiMn-layered double hydroxide can reach a current density of 10 mA cm-2 at a low overpotential of 280 mV on glassy carbon electrode in 1.

Hierarchical Fe-doped NiSe ultrathin nanosheets as an efficient electrocatalyst for oxygen evolution reaction.

Developing highly efficient oxygen evolution reaction (OER) electrocatalysts is critical to the cost-effective generation of clean fuels. Transition-metal selenides have been proposed to be OER catalyst alternatives to noble metal based catalysts, but generally exhibit limited electrocatalytic activity. We here report hierarchical Fe-doped NiSe ((Ni,Fe)Se) ultrathin nanosheets as an efficient electrocatalyst for OER in alkaline electrolytes.

Near-infrared persistent luminescence of Yb in perovskite phosphor.

Here we report the observation of near-infrared persistent luminescence (NIR PersL) of Yb in perovskite CaTiO. Sensitized by the Bi codopants, it exhibits intense NIR PersL of Yb at about 1000 nm. In addition, this phosphor can be excited by the near ultraviolet and even visible light, and the PersL signals can be recorded for more than 80 h.

Near-Infrared Quantum Cutting Long Persistent Luminescence.

By combining the unique features of the quantum cutting luminescence and long persistent luminescence, we design a new concept called "near-infrared quantum cutting long persistent luminescence (NQPL)", which makes it possible for us to obtain highly efficient (>100%) near-infrared long persistent luminescence in theory. Guided by the NQPL concept, we fabricate the first NQPL phosphor Ca2Ga2GeO7:Pr(3+),Yb(3+). It reveals that both the two-step energy transfer of model (I) and the one-step energy transfer of model (IV) occur in (3)P0 levels of Pr(3+).

Self-Activated Photostimulated Luminescence Properties and Stable Storage Capacity of Un-Doped Sr3Al2O5Cl2 Material for Potential Applications in Optical Storage.

Un-doped Sr3Al2OCl2 material is synthesized by conventional solid state method in reducing atmosphere. It shows intense photostimulated luminescence and the emission band of spectrum covers in 420-800 nm under infrared laser (980 nm) stimulation. Both the emission centers and traps are related to oxygen-deficient defects.