Although wheeze is common in preschool children, the underlying pathophysiology has not yet been disentangled. Volatile organic compounds (VOCs) in exhaled breath may serve as noninvasive markers of early wheeze. We aimed to assess the feasibility of VOC collection in preschool children, and to study whether a VOC profile can differentiate between children with and without recurrent wheeze. We ...

The reactive intermediate generated by the addition of tert-butyl and 1,1,3,3-tetramethyl butyl isocyanide and cyclohexyl isocyanide to dialkyl acetylenedicarboxylate was trapped by 3-hydroxy pyridine to produce highly functionalized 4H-chromenes in fairly good  yields.

Nanofibre filters may offer new properties not available in commercial fibre filters. These include a higher surface area and the ability to novel materials within fibres. In addition small size allows potential gains performance due slip-flow phenomenon which normal gas viscosity does apply objects smaller than mean free path of gas. We tested electrospun generated from polyvinyl alcohol solut...

Volatile organic compounds (VOCs) are liquids or solids that contain organic carbon (carbon bonded to carbon, hydrogen, nitrogen, or sulfur, but not carbonate carbon as in CaCO3 nor carbide carbon as in CaC2 or CO2), which vaporize at significant rates. VOCs are probably the second-most widespread and diverse class of emissions after particulates. VOCs are a large family of compounds. Some (e.g...

BACKGROUND Epidemiological studies suggest an association between exposure to volatile organic compounds (VOCs) and adverse allergic and respiratory symptoms. However, whether VOCs exhibit a causal role as adjuvants in asthma development remains unclear. METHODS To investigate the effect of VOC exposure on the development of allergic airway inflammation Balb/c mice were exposed to VOCs emitte...

Volatile organic compounds (VOCs) are emitted into the atmosphere from natural and anthropogenic sources, vegetation being the dominant source on a global scale. Some of these reactive compounds are deemed major contributors or inhibitors to aerosol particle formation and growth, thus making VOC measurements essential for current climate change research. This thesis discusses ecosystem scale VO...

BACKGROUND Wood is a valuable material for interiors, and the psychophysiological relaxation effects of volatile organic compounds (VOCs) from wood chips and essential oils have been reported. However, few studies have identified the odors in full-scale wooden environment, and also, differences in gender have not been clarified. In this study, we aimed to confirm the effects of VOCs emitted fro...

About 15% of the U.S. population get their drinking and household water from a largely unmonitored source: private residential wells. About 400,000 new wells are drilled every year. A new USGS study suggests that the water in a small percentage of domestic wells could contain unsafe levels of volatile organic compounds (VOCs) [EHP 115:1539–1546; Rowe et al.]. VOCs come from a wide variety of so...