534 research outputs found
Avoidance and self-image concerns in fundraising : an experimental analysis
No full textauthor: Hannes SpieglmayrMasterarbeit University of Innsbruck 201
Avoidance and self-image concerns in fundraising : an experimental analysis
No full textauthor: Hannes SpieglmayrMasterarbeit University of Innsbruck 201
Adiponectin, Leptin and Visfatin in Hypoxia and its Effect for Weight Loss in Obesity
No full textRationale: Hypoxia induces leptin gene expression in human adipocytes via hypoxia-inducible factors (HIF-α/β). Under ambient moderate hypoxia, leptin in adipocytes is elevated for at least 14 days. Leptin is supposedly involved in the reduced food intake, increased utilization of fatty acids for energy production and possible weight loss observed at high altitudes. Literature on adiponectin and visfatin in high altitude is inconsistent with reports of elevated levels and non-elevated levels. Exercise in hypoxia studies in obese subjects have shown a significant weight loss after up to 3 weeks, but it is unclear if this effect holds up for longer time periods. Therefore, we aimed to investigate 32 obese subjects completing 52 exercise and rest sessions within 8 months at either moderate or sham hypoxia and to analyze leptin, adiponectin, and visfatin mRNA-expression at different time points of exposure. Methods: Abdominal subcutaneous fat biopsies were taken from 32 obese subjects before, after 3 months and after 8 months of intervention. Subjects were randomly divided into two groups and exercised at moderate intensity at two different study sites twice a week. The IG was exposed to normobaric hypoxia (FiO2: 14.0 ± 0.2%,) at exercise and at rest (FiO2: 12.0 ± 0.2%) and the CG to sham hypoxia. Quantitative real-time polymerase chain reaction (qPCR) was used in order to determine mRNA-levels of leptin, adiponectin, and visfatin. Results: No differences in leptin levels after 3 and 8 months compared to baseline and between groups were found. There was no significant difference regarding adiponectin or visfatin at any time point compared to baseline in the hypoxia group, but an increase after 3 months was seen in the control group at normoxia compared to the hypoxia group (adiponectin: p = 0.029 and visfatin: p = 0.014). Conclusion: In this first several months' duration randomized sham controlled hypoxia exercise and rest study with obese subjects, we found no time extended leptin mRNA-expression in subjects under hypoxia after 3 and 8 months compared to baseline levels. Moderate exercise in normoxia not in hypoxia leads to elevated adiponectin and visfatin levels after 3 months
Fluid characterization utilizing acoustic pressure waves
No full textAuthor Dipl.-Ing. Hannes AntlingerDissertation Johannes Kepler Universität Linz 202
Metabolic Adaptations May Counteract Ventilatory Adaptations of Intermittent Hypoxic Exposure during Submaximal Exercise at Altitudes up to 4000 m
No full textIntermittent hypoxic exposure (IHE) has been shown to induce aspects of altitude acclimatization which affect ventilatory, cardiovascular and metabolic responses during exercise in normoxia and hypoxia. However, knowledge on altitude-dependent effects and possible interactions remains scarce. Therefore, we determined the effects of IHE on cardiorespiratory and metabolic responses at different simulated altitudes in the same healthy subjects. Eight healthy male volunteers participated in the study and were tested before and 1 to 2 days after IHE (7 × 1 hour at 4500 m). The participants cycled at 2 submaximal workloads (corresponding to 40% and 60% of peak oxygen uptake at low altitude) at simulated altitudes of 2000 m, 3000 m, and 4000 m in a randomized order. Gas analysis was performed and arterial oxygen saturation, blood lactate concentrations, and blood gases were determined during exercise. Additionally baroreflex sensitivity, hypoxic and hypercapnic ventilatory response were determined before and after IHE. Hypoxic ventilatory response was increased after IHE (p<0.05). There were no altitude-dependent changes by IHE in any of the determined parameters. However, blood lactate concentrations and carbon dioxide output were reduced; minute ventilation and arterial oxygen saturation were unchanged, and ventilatory equivalent for carbon dioxide was increased after IHE irrespective of altitude. Changes in hypoxic ventilatory response were associated with changes in blood lactate (r = -0.72, p<0.05). Changes in blood lactate correlated with changes in carbon dioxide output (r = 0.61, p<0.01) and minute ventilation (r = 0.54, p<0.01). Based on the present results it seems that the reductions in blood lactate and carbon dioxide output have counteracted the increased hypoxic ventilatory response. As a result minute ventilation and arterial oxygen saturation did not increase during submaximal exercise at simulated altitudes between 2000 m and 4000 m
Health Expenditures of Upper Austrian Hospital Staff - An Econometric Approach
No full textAuthor: Hannes H. Dannhofer, BScMasterarbeit Universität Linz 201
Verwendung von Metall-Organischen Gerüsten zur Umwandlung von CO2 zu Methanol
No full textAuthor Hannes Schausberger BScAbweichender Titel laut Übersetzung der Verfasserin/des VerfassersMasterarbeit Johannes Kepler Universität Linz 2024Arbeit gesperr
Videogramme / Videograms: Die Bildwelten biologischer Experimentalsysteme als Kunst- und Theorieobjekt / The pictorial worlds of biological experimentation as an object of art and theory
No full textDer Schweizer Künstler und Theoretiker Hannes Rickli (*1959) erforscht seit 1991 audiovisuelles Material aus dem wissenschaftlichen Kontext. Die Videobilder und -töne aus der Verhaltensforschung bei Insekten und Fischen liefern dabei weitreichende Erkenntnisse über naturwissenschaftliche Experimentalsysteme: Dass die Herstellung wissenschaftlicher Tatsachen nicht nach festgelegten Plänen erfolgt, sondern sich im physischen Widerstand zwischen menschlichen, technischen – und tierischen – Akteuren ergibt, wird durch Ricklis künstlerische Reflexionen sichtbar. Dieses umfangreiche Buch reflektiert das aus dem Laborkontext gelöste Videomaterial aus der Perspektive von Wissenschaftssoziologie und -geschichte, Kunst- und Medientheorie, Bild- und Filmwissenschaft und führt die Ergebnisse auch mit Beschreibungen der Laborexperimente sowie Hunderten von Abbildungen vor Augen.
Translation of all texts in English in the Supplement, ISBN 978-3-85881-325-7.+ ID: 579733 + Serientitel: Schriftenreihe des Instituts für Gegenwartskunst ZHd
Verwendung von Metall-Organischen Gerüsten zur Umwandlung von CO2 zu Methanol
No full textAuthor Hannes Schausberger BScAbweichender Titel laut Übersetzung der Verfasserin/des VerfassersMasterarbeit Johannes Kepler Universität Linz 2024Arbeit gesperr
Health Expenditures of Upper Austrian Hospital Staff - An Econometric Approach
No full textAuthor: Hannes H. Dannhofer, BScMasterarbeit Universität Linz 201
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