[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.

Effectiveness of ultrasonic measurement for the hyomental distance and distance from skin to epiglottis in predicting difficult laryngoscopy in children.

Objectives: Studies have shown that some ultrasonic indicators can predict difficult airways in adults to an extent. However, whether ultrasonic parameters can be used to predict difficult airways in children is unclear. This study investigated the predictive value of several ultrasonic indices for difficult laryngoscopy (DL) in children.

Ultrasound measurements for evaluation of changes in upper airway during anaesthesia induction and prediction difficult laryngoscopy: a prospective observational study.

Upper airway collapsibility after anaesthesia induction may be associated with unpredictable difficult airway. However, most works on airway anatomy are tended to morphological description before anaesthesia. This study aimed to evaluate the changes of upper airway after anaesthesia induction and using pre-anesthetic ultrasound measurements to predict Difficult Laryngoscopy (DL).

Effectiveness and validity of midsagittal tongue cross-sectional area and width measured by ultrasound to predict difficult airways.

Background: Increased tongue volume measured by ultrasound has been proven to be related to difficult airways. Tongue volume is an indirect parameter and is derived from multiplying the midsagittal tongue cross-sectional area (CSA) by the tongue width. However, few studies have focused on the ability of tongue CSA and tongue width to predict difficult airways.

Salidroside-Mediated Neuroprotection is Associated with Induction of Early Growth Response Genes (Egrs) Across a Wide Therapeutic Window.

Salidroside exhibits anti-inflammatory, anti-oxidative, and anti-apoptotic properties. To identify whether salidroside might be a candidate for treating ischemic stroke, we investigated the effects of salidroside or vehicle, given daily for 6 days, after middle cerebral artery occlusion (MCAO) for 2 h and reperfusion for either 1 or 48 h in rats. Salidroside reduced cerebral infarct volume and significantly improved neurological scores whether started after 1 or 48 h of reperfusion.

Recombination rates between adjacent genic and retrotransposon regions in maize vary by 2 orders of magnitude.

Genetic map length and gene number in eukaryotes vary considerably less than genome size, giving rise to the hypothesis that recombination is restricted to genes. The complex genome of maize contains a large fraction of repetitive DNA, composed principally of retrotransposons arranged in clusters. Here, we assess directly the contribution of retrotransposon clusters and genes to genetic length.