Photochemistry of BrC
نویسندگان
چکیده
Photochemical processing of aqueous atmospheric brown carbon R. Zhao, A. K. Y. Lee, L. Huang, X. Li, F. Yang, and J. P. D. Abbatt Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada Atmospheric Science and Technology Directorate/Science and Technology Branch, Environment Canada, Toronto, Canada School of Chemistry and Environment, Beihang University, Beijing, China Chongqing Institute of Green and Intelligent Technology, Chongqing, China
منابع مشابه
Brown carbon: a significant atmospheric absorber of solar radiation?
Several recent observational studies have shown organic carbon aerosols to be a significant source of absorption of solar radiation. The absorbing part of organic aerosols is referred to as “brown” carbon (BrC). Using a global chemical transport model and a radiative transfer model, we estimate for the first time the enhanced absorption of solar radiation due to BrC in a global model. The simul...
متن کاملImpacts of brown carbon from biomass burning on surface UV and ozone photochemistry in the Amazon Basin
The spectral dependence of light absorption by atmospheric particulate matter has major implications for air quality and climate forcing, but remains uncertain especially in tropical areas with extensive biomass burning. In the September-October 2007 biomass-burning season in Santa Cruz, Bolivia, we studied light absorbing (chromophoric) organic or "brown" carbon (BrC) with surface and space-ba...
متن کاملRaman Study of the Photochemistry of Maleic Acid Adsorbed on the Surface of Colloidal Silver
The surface-enhanced Raman scattering (SERS) spectra of maleic (cis; 2-butaneoic acid) and fumaric (trans; 2-butaneoic acid) acids adsorbed on aqueous silver sol particles are reported. These two acids form two groups of isomers which differ only in the relative positions of the two carboxylate groups. The photochemistry of maleic and fumaric acids adsorbed on the surface of silver colloids...
متن کاملTwo modules in the BRC repeats of BRCA2 mediate structural and functional interactions with the RAD51 recombinase
The breast and ovarian cancer suppressor protein BRCA2 controls the RAD51 recombinase in reactions that lead to homologous DNA recombination (HDR). BRCA2 binds RAD51 via eight conserved BRC repeat motifs of approximately 35 amino acids, each with a varying capacity to bind RAD51. BRC repeats both promote and inhibit RAD51 assembly on different DNA substrates to regulate HDR, but the structural ...
متن کاملThyroid Hormone Status Interferes with Estrogen Target Gene Expression in Breast Cancer Samples in Menopausal Women
We investigated thyroid hormone levels in menopausal BrC patients and verified the action of triiodothyronine on genes regulated by estrogen and by triiodothyronine itself in BrC tissues. We selected 15 postmenopausal BrC patients and a control group of 18 postmenopausal women without BrC. We measured serum TPO-AB, TSH, FT4, and estradiol, before and after surgery, and used immunohistochemistry...
متن کامل