Flash pyrolysis vacuum ultraviolet photoionization mass spectrometry of cycloheptane: A study of the initial decomposition mechanism.

Thermal decomposition of cycloheptane was studied using flash pyrolysis coupled with vacuum ultraviolet (118.2 nm) single photon ionization time-of-flight mass spectrometry at temperatures ranging from 295 K to 1380 K. C-C bond breaking of cycloheptane leading to the 1,7-heptyl diradical was considered as the initiation step.

Alterations of IL-1beta and TNF-alpha expression in RAW264.7 cell damage induced by two samples of PM with different compositions.

Fine particulate matter 2.5 (PM) has been demonstrated by previous studies to be associated with cell damage. To explore the impact of the composition of PM on PM-mediated inflammation, this study investigated the composition of PM collected during the wintertime indoor heating season and observed its inflammatory effect.

Fabrication of porous gehlenite coating on AlO-ZrO-SiC composite ceramics and its biological activities.

Porous gehlenite coatings on AlO-ZrO-SiC composite ceramics were prepared by electro-spraying technique combined with reactive sintering method. The influences of gehlenite coating on the mechanical property of the ceramics and biological activity of the coating were investigated. The results indicated that the gehlenite coating has limited influences on flexural strength and fracture toughness of the ceramics, and the coating has elastic modulus of 82 GPa, hardness of 2.