Porous silica spheres were investigated for their effectiveness in removing typical indoor air pollutants, such as aromatic and carbonyl-containing volatile organic compounds (VOCs), and compared to the commercially available polymer styrene-divinylbenzene (XAD-4). The silica spheres and the XAD-4 resin were coated on denuder sampling devices and their adsorption efficiencies for VOCs evaluated...

Heme-carbonyl complexes are widely exploited for the insight they provide into the structural basis of function in heme-based proteins, by revealing the nature of their bonded and nonbonded interactions with the protein. This report presents two novel results which clearly establish a FeCO vibrational signature for crystallographically verified pentacoordination. First, anisotropy in the NRVS d...

This noninvasive method for collection and analysis of a wide range of aldehydes and ketones in human breath may enable assessment of lipid peroxidation and metabolic status in vivo. Breath samples are drawn through silica cartridges impregnated with 2,4-dinitrophenylhydrazine, which traps carbonyls as their hydrazone derivatives. The hydrazone derivatives are eluted from the cartridges with ac...

C1-C5 carbonyl compound concentrations were measured at four sites; three urban sites in the Mexico City Metropolitan Area (MCMA) and a rural site in the state of Morelos during the period 2006–2007. Formaldehyde, acetaldehyde and acetone were found to be the most abundant carbonyls, with acetone showing the highest levels at all sites. Concentrations were highest in winter at all sites and low...

Organisms living on the earth may undergo inevitable toxification by biological 'garbage', a variety of bio-metabolites. Such garbage includes a particularly large number of toxic carbonyls, such as alpha,beta-unsaturated carbonyls created by free radicals, glycation, and other post-translational side-reactions during various stresses and diseases. The accumulation of these toxic substances and...

The seemingly counter-intuitive transition metal-catalyzed deconjugative isomerizations of ?,?-unsaturated carbonyls offer novel perspectives within the context remote functionalization strategies. This Digest provides an overview handful examples that have been reported over last two decades in this area.

Indoor air pollution sources with emissions of fine particles (PM2.5), including environmental tobacco smoke (ETS) and incense (IS) deteriorate indoor quality may cause respiratory diseases in humans. This study characterized the emission factors (EFs) five types Hong Kong using an chamber. Human alveolar epithelial cells (A549) were exposed to PM2.5 collected from different determine their cyt...