A tetrahedron-shaped polyoxoantimotungstate encapsulating a hexanuclear octahedral lanthanide-oxo cluster for an amperometric bromate sensor.

An inorganic hexalanthanide-oxo-cluster-encapsulated antimotungstate, KNaH[Nd(OH)(HO)(B-α-SbWO)]·67HO (1), has been successfully synthesized by a facile one-step hydrothermal reaction method. The tetrahedron-shaped two-shell {Nd(OH)(HO)(B-α-SbWO)}(1a) polyanion is composed of a novel pure lanthanide-oxo {Nd(μ-OH)(HO)} octahedron and {(B-α-SbWO)} tetrahedron. After being effectively loaded onto a glassy carbon electrode (GCE) by electrostatic adsorption using polydiallyldimethyl ammonium chloride (PDDA)-functionalized multi-walled carbon nanotubes (MWCNTs), compound 1 exhibits electrochemical activity for the reduction of bromate ions with good selectivity, a high sensitivity of 186 μA mM and a detection limit that has reached 1.

Photo-Activating Biomimetic Polyoxomolybdate for Boosting Oxygen Evolution in Neutral Electrolytes.

Inspired by the metal-oxo cluster structural feature and charge separation behaviour of the oxygen evolving center (OEC) in photosystem II (PS-II) under photoirradiation, a new crystalline photochromic polyoxomolybdate, MV [β-Mo O ] (1, MV=methyl viologen cation), is designed as a biomimetic oxygen evolution reaction (OER) catalyst in neutral electrolytes. After photoinduced electron transfer (PIET) with colour change from colourless to grey, it remains in an ultra-stable charge-separated state over a year under ambient conditions. The observed overpotential at 10 mA ⋅ cm and Tafel slope decrease by 49 mV and 62.

Pathological Analysis and Endoscopic Characteristics of Colorectal Laterally Spreading Tumors.

Objective: This study aims to analyze the endoscopic and pathological characteristics of colorectal laterally spreading tumors (LSTs) to assist malignant risk stratification to inform selection of the appropriate treatment strategy.

Methods: Patients with colorectal LST were selected as retrospective study objects. Characteristics, including endoscopic findings and the most common site of LSTs of different diameters and histological types, were analyzed.

Duodenal giant stromal tumor combined with ectopic varicose hemorrhage: A case report.

Background: Gastrointestinal stromal tumors (GISTs) are mesenchymal tissue tumors originating from Cajal cells, presenting diverse clinical manifestations due to the different sizes, locations, and growth patterns of the lesions. Duodenum is an uncommon site of GISTs, more with gastrointestinal obstruction and bleeding as the first symptoms. Ectopic duodenal varix, as a rare varix occurring outside the gastroesophageal region, is the main type of heterotopic varices and an unusual cause of gas-trointestinal hemorrhage.

Angiotensin-(1-7) Improves Liver Fibrosis by Regulating the NLRP3 Inflammasome via Redox Balance Modulation.

Aims: Angiotensin II (Ang II) aggravates hepatic fibrosis by inducing NADPH oxidase (NOX)-dependent oxidative stress. Angiotensin-(1-7) [Ang-(1-7)], which counter-regulates Ang II, has been evidenced to protect against hepatic fibrosis. The NOD-like receptor family pyrin domain containing 3 (NLRP3) inflammasome, being activated by reactive oxygen species (ROS), is identified as a novel mechanism of liver fibrosis.