There is a growing concern over suspected presense of unknown perfluoroaliphatic substances (PFAS) in consumer goods and the environment. Such substances, possibly with high molecular weight, might be precursors hazardous or controlled known PFAS. Recent studies confirmed that total organic fluorine (TOF) content often can not explained by measured target One classes such unknowns are polymers ...

The Wisconsin Hα Mapper (WHAM) Northern Sky Survey has revealed a loop of H II reaching 1300 pc from the Galactic midplane above the Cas OB6 association in the Perseus sprial arm. This enormous feature surrounds and extends far above the “W4 Chimney” identified by Normandeau et al. and appears to be associated with the star formation activity near the W3/W4/W5 H II region complex. The existence...

Abstract The properties of BaCe 1? x In O 3? ? ( = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, and 0.40) as proton conducting electrolyte are examined. dense is formed after sintering at 1300 °C for 5 h in air. samples with content ? 25 mol% contain 2 3 a secondary phase. highest total conductivity around 5×10 ?3 S/cm 0.75 0.25 the wet hydrogen atmosphere 700 °C. After exposure to pure CO h, conc...

Yttria stabilized zirconia (YSZ) has been widely used as electrolyte in solid oxide fuel cell (SOFC). The effect of fabrication process on the properties of YSZ electrolyte thick film is discussed in the paper. With YSZ nano-powders of about 20-60nm as raw material, YSZ green adobe was fabricated by tape calendering process. Three-step sintering process was performed firstly holding at 1000°C f...