Analysis of the volatile part of the metabolome (volatile organic compounds, VOC) present in the gas phase of excreted materials is a promising new screening tool for several cancers, including colorectal cancer (CRC). The VOC signature can reflect health status, like a 'fingerprint', and can be modified in several diseases. Technical difficulties still limit the widespread use of VOC analysis ...

Nowadays, many companies collect Voice of the Customer (VOC) in order to understand more about customers and the way they think about the companies or products/services. Many collection methods are being used to capture those valuable resources. This paper introduces “VOC 3.0”, a new Voice of the Customer (VOC) collection method through customer co-creation. This new method is aiming to create ...

[1] Recent field observations in urban areas have shown that trace gases, such as O3, NO2, and NO3, develop distinct vertical concentration profiles at night. Because nocturnal chemistry can change the gas-phase and particulate composition in the urban boundary layer considerably, it is important to understand the mechanisms that lead to the change of trace gas levels with altitude. The quantif...

We derive an analytical formula for the open-circuit voltage Voc of organic planar heterojunction solar cells under standard operating conditions. We find that the type of free carrier recombination at the interface between the donor and acceptor materials controls the slope of Voc vs incident light intensity. By using the same derivation, an equation for the resistance around Voc is obtained. ...

Identifying loss mechanisms and predicting device performance are key goals of device and process characterization. Photoconductance measurements allow the extraction of the Implied Voc and Suns Voc, which together can be used for process monitoring, for loss analysis and to identify the potential device performance in the absence of unwanted defects. In this paper, we measure the Implied Voc a...

[1] Proton-transfer-reaction mass spectrometry (PTR-MS) was deployed for continuous real-time monitoring of volatile organic compounds (VOCs) at a site near the Houston Ship Channel during the Texas Air Quality Study 2000. Overall, 28 ions dominated the PTR-MS mass spectra and were assigned as anthropogenic aromatics (e.g., benzene, toluene, xylenes) and hydrocarbons (propene, isoprene), oxygen...

The dual mission of the Wisconsin Initiative for Science Literacy is to promote literacy in science, mathematics and technology among the general public and to attract future generations to careers in research, teaching and public service. At the March 5, 2010 UW-Madison Chemistry Department Colloquium, the director of the Wisconsin Initiative for Science Literacy (WISL) encouraged all Ph.D. ch...

An activated sludge aeration tank (W × L × H = 40 × 40 × 300 cm) with a set of 2 mm orifice air spargers was utilized to treat gas-borne volatile organic compounds (VOCs, toluene, p-xylene, and dichloromethane) in air streams. Effects of liquid depth, aeration intensity (G/A), overall mass transfer coefficient of oxygen in clean water (KLaO2), dimensionless Henry’s law coefficient of the tested...

OBJECTIVES The study objective was to assemble emission characteristics of the sources of the ambient volatile organic compounds (VOCs) and to elaborate methods of organizing them into the sources' chemical profiles. MATERIAL AND METHODS The UNMIX--sensor modeling method from the U.S. Environment Protection Agency (EPA)--was used to process the VOC concentration data acquired over the years 2...

Abstract. Increased tropospheric ozone (O3) and high temperatures affect human health during heat waves. Here, we perform a source attribution that considers separately the formation of German surface from emitted NOx volatile organic compound (VOC) precursors two peak events took place in 2015 2018 which were associated with elevated temperatures. Results showed concentrations can be primarily...