K
Karl Unterkofler
Researcher at Vorarlberg University of Applied Sciences
Publications - 76
Citations - 3468
Karl Unterkofler is an academic researcher from Vorarlberg University of Applied Sciences. The author has contributed to research in topics: Breath gas analysis & Isoprene. The author has an hindex of 29, co-authored 74 publications receiving 2987 citations. Previous affiliations of Karl Unterkofler include University of Graz & Graz University of Technology.
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Journal ArticleDOI
Isoprene and acetone concentration profiles during exercise on an ergometer
Julian King,Alexander Kupferthaler,Alexander Kupferthaler,Karl Unterkofler,Karl Unterkofler,Helin Koc,Helin Koc,Helin Koc,Susanne Teschl,Gerald Teschl,Wolfram Miekisch,Wolfram Miekisch,Jochen K. Schubert,Jochen K. Schubert,Hartmann Hinterhuber,Hartmann Hinterhuber,Anton Amann,Anton Amann +17 more
TL;DR: Data appear to favor the hypothesis that short-term effects visible in breath isoprene levels are mainly caused by changes in pulmonary gas exchange patterns rather than fluctuations in endogenous synthesis, and hold great potential in capturing continuous dynamics of non-polar, low-soluble VOCs over a wide measurement range.
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Detecting Ventricular Fibrillation by Time-Delay Methods
TL;DR: This new VF detection algorithm is based on time-delay methods and outperforms all other investigated algorithms and has a high detection quality and area under its receiver operating characteristic curve.
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Dynamic profiles of volatile organic compounds in exhaled breath as determined by a coupled PTR-MS/GC-MS study.
Julian King,Julian King,Pawel Mochalski,Alexander Kupferthaler,Alexander Kupferthaler,Karl Unterkofler,Karl Unterkofler,H. Koc,H. Koc,Wojciech Filipiak,Wojciech Filipiak,Susanne Teschl,Hartmann Hinterhuber,Hartmann Hinterhuber,Anton Amann,Anton Amann +15 more
TL;DR: These investigations aim at evaluating the impact of breathing patterns, cardiac output or blood pressure on the observed breath concentration and allow for the detection and identification of several VOCs revealing characteristic rest-to-work transitions in response to variations in ventilation or perfusion.
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Physiological modeling of isoprene dynamics in exhaled breath
Julian King,Helin Koc,Helin Koc,Karl Unterkofler,Karl Unterkofler,PaweŁ Mochalski,Alexander Kupferthaler,Gerald Teschl,Susanne Teschl,Hartmann Hinterhuber,Anton Amann,Anton Amann +11 more
TL;DR: A thorough modeling study of the end-tidal breath dynamics associated with isoprene, which serves as a paradigmatic example for the class of low-soluble, blood-borne VOCs, is devoted to aid further investigations regarding the exhalation, storage, transport and biotransformation processes associated with this important compound.
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Blood and breath levels of selected volatile organic compounds in healthy volunteers.
Pawel Mochalski,Julian King,Martin Klieber,Martin Klieber,Karl Unterkofler,Hartmann Hinterhuber,Matthias Baumann,Anton Amann,Anton Amann +8 more
TL;DR: Compared blood, room air and breath levels in parallel, a tentative classification of volatiles into endogenous and exogenous compounds can be achieved, and twelve analytes were found to be highly present in both blood and exhaled air.