Terpenoids (isoprene and monoterpenes) are highly reactive Volatile Organic Compounds (VOCs) known for decades their biogenic origin. Here, we discuss the nature magnitude of anthropogenic emissions. We compiled re-analyzed 14 data sets in situ VOC observations collected over last decade contrasting urban areas from mid-latitudes to subtropical regions. show systematic presence terpenoids ambie...

Abstract. Volatile organic compounds (VOCs) are key precursors of ozone and particulate matter, which the two dominant air pollutants in urban environments. However, compositions sources VOCs aloft have rarely been reported so far. To address this highly time-resolved measurements were made by a proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS) at 450 m platform on Canton T...

Mechanical milling of aluminum powders with two immiscible liquids, acetonitrile and hexane, produced roughly spherical particles increased flowability sizes in the range tens to hundreds microns specific surface areas 15 – 30 m2/g. The near shapes comprised agglomerated flakes. Samples were milled from 0.5 2 hours a planetary mill. Longer times led reduced sizes, while porosity area peaked at ...

As diverse environmental changes continue to influence the structure and function of plant-pollinator interactions across spatial and temporal scales, we will need to enlist numerous approaches to understand these changes. Quantitative examination of floral volatile organic compounds (VOCs) is one approach that is gaining popularity, and recent work suggests that floral VOCs hold substantial pr...

This report describes a rolling stir bar sampling procedure for volatile organic compounds (VOCs) present on various biological surfaces. In combination with thermal desorption/gas chromatography/mass spectrometry, this analytical technique was initially tested for quantitative profiling of human skin VOCs. It is also applicable to additional hydrophobic surfaces such as agricultural products, ...

[1] We present a novel capability in satellite remote sensing with implications for air pollution control strategy. We show that the ratio of formaldehyde columns to tropospheric nitrogen dioxide columns is an indicator of the relative sensitivity of surface ozone to emissions of nitrogen oxides (NOx NO + NO2) and volatile organic compounds (VOCs). The diagnosis from these space-based observati...

Cucumis melo fruit is highly valued for its sweet and refreshing flesh, however the flavour and value are also highly influenced by aroma as dictated by volatile organic compounds (VOCs). A simple and robust method of sampling VOCs on polydimethylsiloxane (PDMS) has been developed. Contrasting cultivars of C. melo subspecies melo were investigated at commercial maturity: three cultivars of var....

A box model study on photochemical interactions between VOCs and reactive halogen species in the marine boundary layer K. Toyota, Y. Kanaya, M. Takahashi , and H. Akimoto Frontier Research System for Global Change, Yokohama, Japan Also at Center for Climate System Research, The University of Tokyo, Tokyo, Japan Received: 1 August 2003 – Accepted: 28 August 2003 – Published: 1 September 2003 Cor...