[Evolution Characteristics and Typical Pollution Episodes of PM and O Complex Pollution in Bozhou City from 2017 to 2022].

In China, atmospheric pollution exhibits a complex pattern, with simultaneous exceedances of fine particulate matter （PM） and ozone （O） levels becoming evident. To understand the complex pollution characteristics and evolution patterns of PM and O in Bozhou City, various methods such as weather classification, analysis of typical pollution processes, and investigation of precursor sources were employed to explore the pollution and variations of PM and O in Bozhou City from 2017 to 2022 and subsequently analyze their causes and precursor sources. The results indicated that： ① PM-O complex pollution in Bozhou City mostly occurred under high-pressure weather conditions, with daytime high temperatures and low humidity promoting the formation of O pollution, whereas nighttime high humidity and atmospheric oxidative conditions promoted the generation of secondary components such as nitrates and ammonium salts in PM.

Concentration effects on the local structures and electronic properties of ErBaYF: a first-principles study.

Erdoped barium yttrium fluoride (BaYF) crystal has gained long-term attention due to its great potential in laser and medical device applications. However, the local structures of Erdoped BaYFsystem (Er:BYF) remain uncertain, and the effect of doping concentration on structures and properties is unknown. Therefore, in this study, the first-principles study of the structural evolution of ErBaYF(= 0.

Phytoecdysteroids from Dianthus superbus L.: Structures and anti-neuroinflammatory evaluation.

Six undescribed C-phytoecdysteroid derivatives, named superecdysones A-F, and ten known analogs were extracted from the whole plant of Dianthus superbus L. Their structures were identified by extensive spectroscopy, mass spectrometric methods, chemical transformations, chiral HPLC analysis, and the single-crystal X-ray diffraction analysis. Superecdysones A and B possess a tetrahydrofuran ring in the side chain and superecdysones C-E are rare phytoecdysones containing a (R)-lactic acid moiety, whereas superecdysone F is an uncommon B-ring-modified ecdysone.

Ozone Gas Bath Combined with Endovenous Laser Therapy for Lower Limb Venous Ulcers: A Randomized Clinical Trial.

Background: Endovenous laser therapy (EVLT) is safe and effective for lower limb venous ulcers. However, severe necrosis and infection in the ulcer area are contraindications of puncture and EVLT. Local bath with ozone gas has been shown to improve the condition of ulcer areas.