Protecting effects of smoking against COVID-19: a community-based retrospective cohort study in middle- and older-aged adults.

On December 7, 2022, China switched from dynamic zeroing strategy against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to reopening. A nationwide SARS-CoV-2 epidemic emerged rapidly. The effect of smoking on SARS-CoV-2 infection remains unclear.

Surfactant-Free Monodispersed Pd Nanoparticles Template for Core-Shell Pd@PdPt Nanoparticles as Electrocatalyst towards Methanol Oxidation Reaction (MOR).

An eco-friendly two-step synthetic method for synthesizing Pd@PdPt/CNTs nanoparticles was introduced and studied for the methanol oxidation reaction. The Pd@PdPt alloy core-shell structure was synthesized by preparing a surfactant-free monodispersed Pd/CNTs precursor through the hydrolysis of tetrachloropalladate (II) ion ([PdCl]) in the presence of carbon nanotubes (CNTs) and the subsequent hydrogen reduction and followed by a galvanic replacement reaction. This method opens up an eco-friendly, practical, and straightforward route for synthesizing monometallic or bimetallic nanoparticles with a clean surfactant-free electrocatalytic surface.

Correction: Super-large dendrites composed of trigonal PbO nanoplates with enhanced performances for electrochemical devices.

Correction for 'Super-large dendrites composed of trigonal PbO2 nanoplates with enhanced performances for electrochemical devices' by Liang-Xin Ding et al., Chem. Commun.

Effects and mechanisms of Cryptotanshinone on rats with adjuvant arthritis.

Background: Cryptotanshinone (CT) is the major active constituent of Salvia miltiorrhiza Bunge. The present study was carried out to investigate the effects of CT on rats with adjuvant arthritis (AA).

Methods: AA was induced by the metatarsal footpad injection with complete Freund's adjuvant in male Sprague-Dawley rats.

Super-large dendrites composed of trigonal PbO2 nanoplates with enhanced performances for electrochemical devices.

Super-large dendrites composed of trigonal PbO(2) nanoplates were successfully synthesized by electrodeposition and tested as potential materials for electrochemical device applications.

Synthesis of hierarchical rippled Bi(2)O(3) nanobelts for supercapacitor applications.

Hierarchical rippled Bi(2)O(3) nanobelts were successfully synthesized by an electrodeposition route and tested as promising materials for supercapacitor applications.

Effects of cryptotanshinone on immune functions in rats with adjuvant arthritis.

Background: Cryptotanshinone (CT) was originally isolated from the dried roots of Salvia militorrhiza, an herb that is used extensively in Asian medicine and the extracts of this herb have been used in the treatment of several pathologies, including cardiovascular diseases, hematological abnormalities, hepatitis, and hyperlipidemia, but no studies had been carried on the treatment for rheumatic diseases with it. This study aimed to investigate the effects of cryptotanshinone on immune functions in rats with adjuvant arthritis (AA).

Methods: Complete Freund's adjuvant was used to induce AA in rats.