Gaseous emissions from brake wear can form secondary particulate matter.

Road traffic is an important source of urban air pollutants. Due to increasingly strict controls of exhaust emissions from road traffic, their contribution to the total emissions has strongly decreased over time in high-income countries. In contrast, non-exhaust emissions from road vehicles are not yet legislated and now make up the major proportion of road traffic emissions in many countries.

A Retrospective Cohort Study of the Efficacy, Safety, and Clinical Value of 6-TG versus 6-MP Maintenance Therapy in Children with Acute Lymphoblastic Leukemia.

Objective: To explore the efficacy, safety, and clinical value of 6-TG versus 6-MP when treating childhood acute lymphoblastic leukemia (ALL).

Methods: The study period was from January 2017 to June 2021. The subjects of this study were 100 children with ALL who were treated in our hospital.

A Connection Method between Ultrahard PtW8 Wire and a Au Thick Film Based on Parallel-Gap Resistance Microwelding.

To meet the application requirements of a thermal gas sensor, it is necessary to realize a bond connection between PtW8 wire with a Au thick film. However, the physical properties, such as the melting point and hardness, of the two materials differ greatly. In this study, the parallel-gap resistance microwelding was introduced into the bonding connection between PtW8 wire and a Au thick film in the thermal gas sensor.

Factors affecting the exposure of passengers, service staff and train drivers inside trains to airborne particles.

This study investigated train air conditioning filters, interior ventilation systems, tunnel environments and platform air quality as factors affecting the concentrations of airborne particles inside trains and provides information on the exposure of passengers, train drivers and service staff to particles. Particle sampling was done inside the passenger cabin, the driver cabin and the service staff cabin during on-board measurement campaigns in 2016 and 2017. The results show that interior ventilation plays a key role in maintaining cleaner in-train air.

The effect of vitamin D auxiliary rehabilitation therapy in children with cerebral palsy and language dysfunction.

Background: The aim of the present study was to observe the clinical efficacy of vitamin D auxiliary rehabilitation therapy in children with cerebral palsy and language dysfunction.

Methods: Eighty-two cases of children with cerebral palsy and language dysfunction in our hospital from March 2011 to June 2014 were selected for this study. They were divided into two groups: the rehabilitation treatment group (simple group, N.