Temperature dependence of the kinetic isotope effect inβ-pinene ozonolysis

Temperature dependence of yields of secondary organic aerosols from the ozonolysis of α-pinene and limonene

Temperature dependence of yields of secondary organic aerosols from the ozonolysis of α-pinene and limonene H. Saathoff, K.-H. Naumann, O. Möhler, Å. M. Jonsson, M. Hallquist, A. Kiendler-Scharr, Th. F. Mentel, R. Tillmann, and U. Schurath Institute for Meteorology and Climate Research, Forschungszentrum Karlsruhe, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany Dept. of ...

Ozonolysis of a-pinene at atmospherically relevant concentrations: Temperature dependence of aerosol mass fractions (yields)

[1] Despite a number of smog chamber studies of the a-pinene/O3 system, the effect of temperature on a-pinene secondary organic aerosol (SOA) mass fractions (or yields) remains poorly understood. In this study, the temperature dependence of secondary organic aerosol mass fractions (AMF) during ozonolysis of a-pinene is investigated in a temperature controlled smog chamber. Experiments were perf...

Kinetic Isotope Effect of Prostaglandin H Synthase Exhibits Inverted Temperature Dependence

Conversion of arachidonic acid to prostaglandin G2/H2 catalyzed by prostaglandin H synthase (PGHS) is proposed to involve initial transfer of the C13 pro-(S) hydrogen atom from arachidonate to the Tyr385 radical in PGHS, followed by insertion of two oxygen molecules and several chemical bond rearrangements. The initial hydrogen-transfer was recently concluded to be a rate-limiting step in cyclo...

Parameterization of α-pinene ozonolysis SOA

Viscosity and temperature dependence of the magnetic isotope effect

The 13C enrichment observed in the first order photolytic decomposition of dibenzylketone (1,3-diphenyl2-propanone) was studied as a function of solvent viscosity and temperature. The isotope effect is due to electron-nuclear hyperfine interactions in the free radical intermediates of the reaction. The results are explained using a continuum diffusion model and a simplified version of the radic...