A5102903819- Air Quality and Health Impacts
- Indoor Air Quality and Microbial Exposure
- Fermentation and Sensory Analysis
- Advanced Chemical Sensor Technologies
- Vehicle emissions and performance
- Odor and Emission Control Technologies
- Coffee research and impacts
- Advanced Aircraft Design and Technologies
- Olfactory and Sensory Function Studies
- Building Energy and Comfort Optimization
- Noise Effects and Management
- Biochemical and biochemical processes
- Postharvest Quality and Shelf Life Management
- Infection Control and Ventilation
- Marine Biology and Environmental Chemistry
- Allergic Rhinitis and Sensitization
- Building materials and conservation
- Food Chemistry and Fat Analysis
- Transportation Safety and Impact Analysis
- Environmental Education and Sustainability
- Environmental Chemistry and Analysis
- Meat and Animal Product Quality
- Antimicrobial agents and applications
- Icing and De-icing Technologies
- Aerodynamics and Fluid Dynamics Research
Fraunhofer Institute for Building Physics
2006-2025
Ludwig-Maximilians-Universität München
2010
University of Tartu
2010
Fraunhofer Society
2008
Technical University of Munich
2008
Western Regional Research Center
2002-2008
Hebrew University of Jerusalem
2002-2008
Leibniz-Institute for Food Systems Biology at the Technical University of Munich
1996-2001
The potent odorants were quantified in a sample of roasted Arabica coffee. On the basis results, 27 dissolved an oil/water mixture. flavor profile model obtained was very close to that real sample. In duo and triangle tests, compared with models missing one or more odorants. These experiments indicated 2-furfurylthiol, 4-vinylguaiacol, several alkyl pyrazines, furanones, acetaldehyde, propanal, methylpropanal, 2- 3-methylbutanal had greatest impact on coffee flavor. Keywords: Aroma model;...
ABSTRACT Genetic variation between naturally occurring populations provides a unique source to unravel the complex mechanisms of stress tolerance. Here, we have analysed O 3 sensitivity 93 natural Arabidopsis thaliana accessions together with five ‐sensitive mutants acute exposure. The in among was much higher than and corresponding wild types. A subset nine major their responses studied more detail. Among traits assayed, stomatal conductance ( g st ) an important factor determining selected...
Abstract The concentrations of 22 potent odorants, including acetaldehyde, methylpropanal, 2‐ and 3‐methylbutanal, 2,3‐butanedione, 2,3‐pentanedione, 2‐furfurylthiol, 2‐ethyl‐3,5‐dimethylpyrazine 2,3‐diethyl‐5‐methylpyrazine, were quantified in the headspace roasted coffee powder. A model mixture containing these odorants was prepared on basis results found headspace. When evaporated, similarity aroma this to that sample scored 2.6 a scale 0 (no similarity) 3.0 (identical). Also, after...
Three tasty (BR-139, FA-624, and FA-612) two less (R-144 R-175) fresh greenhouse tomato cultivars, which significantly differ in their flavor profiles, were screened for potent odorants using aroma extract dilution analysis (AEDA). On the basis of AEDA results, 19 volatiles selected quantification those 5 cultivars gas chromatography−mass spectrometry (GC-MS). Compounds such as 1-penten-3-one, (E,E)- (E,Z)-2,4-decadienal, 4-hydroxy-2,5-dimethyl-3(2H)-furanone (Furaneol) had higher odor units...
Significant tomato matrix effects on the volatility of certain fresh odorants were found. The concentrations such as (E,E)-2,4-decadienal, beta-damascenone, and beta-ionone, in crushed fruit obtained by solid-phase microextraction (SPME), resulting from a calibration curve 5.5-, 2-, 12-fold higher, respectively, than those calculated based buffer solutions. Static headspace analyses indicated that, most cases, significantly retains relative to solution. Thus, concentration is lower expected...
The interior of motor vehicles is made a wide variety synthetic materials, which emit volatile organic compounds (VOC). We tested the health effects emissions from exposed to "parked in sunshine" conditions. A new and 3 year old vehicle with identical were 14 000 W light. Indoor air was analyzed by GC-MS. Toxicity extracts indoor assayed human primary keratinocytes, lung epithelial A549 cell line, Chinese hamster V79 fibroblasts. In addition, toxicity after metabolic activation CYP1A1,...
Two different methods for sampling of primary, secondary, and tertiary aliphatic aromatic amines in air have been developed improving amine analysis air. The aim was to a quick method direct at defined times, example, material testing as well long-term measurements by diffusive during field studies without instrumentation. goal the study chemical amines, especially focusing on an analytical suitable besides primary secondary amines. For both sampling, samplers working with phosphoric acid...
Abstract Der Einsatz von Wärmedämmverbundsystemen (WDVS) stellt eine wesentliche Maßnahme zur Verringerung der Transmissionswärmeverluste bei Bestandsgebäuden dar. Die damit einhergehende thermische Entkopplung Fassadenoberfläche vom Mauerbildner führt bekannterweise zu einer veränderten Feuchtebilanz an Fassade und somit günstigeren Bedingungen für ein Wachstum Mikroorganismen. Fassadenbeschichtungen werden aus diesem Grund häufig mit bioziden Wirkstoffen zum Schutz gegen Algen‐...
In the CleanSky 2 ComAir study, subject tests were conducted in Fraunhofer Flight Test Facility cabin mock-up. This mock-up consists of front section a former in-service A310 hosting up to 80 passengers. 12 sessions outdoor/recirculation airflow ratio was altered from today’s typically applied fractions 88% recirculation fraction. leads increased relative humidity, carbon dioxide (CO2) and Total Volatile Organic Compounds (TVOC) levels air, as emissions by passengers become less diluted...
Aircraft cabins are special environments. Passengers sit in close proximity a space with low pressure that they cannot leave. The cabin is ventilated mixture of outside and recirculated air. volume air impacts the carbon footprint flying. Higher recirculation rates could be considered to save energy divert less kerosene from producing thrust.To investigate whether higher aircraft negatively affect passengers' health well-being if occupancy plays role this.In 2 (occupancy: full half-occupied)...
Increased efforts have been undertaken by manufacturers to reveal the secrets of material odors, structure odorants responsible, with regard finding out source(s) odor and possible starting points for reduction, therewith product improvement, increased consumer satisfaction improved indoor air quality. The identification odor-active compounds in materials means gas chromatography-olfactometry (GC-O, also called GC-sniffing), performed at Fraunhofer Institute Building Physics (IBP) during...
Abstract Durch Schlagregen können biozide Wirkstoffe, die zur Verhinderung bzw. Verzögerung des Bewuchses von Fassaden mit Algen und Pilzen eingesetzt werden, aus Fassadenbeschichtungen ausgewaschen werden. Seit ca. zehn Jahren werden Wirkstoffe zunehmend auch in verkapselter Form eingesetzt. In einem einjährigen Freilandversuch wurde Auswaschung der Terbutryn (2‐Methylthio‐4‐tert‐butylamino‐1,3,5‐triazin), Diuron (DCMU, 3‐(3,4‐dichlorophenyl)‐1,1‐dimethylurea), IPBC...
Gypsum is widely used in building products, e. g., as drywall, stucco or constituent mortar, because it easy to handle and assigned creating a good indoor air quality. Odor analysis of gypsum product with sulfurous off-odor by means gas chromatography-olfactometry compared two unobtrusive commercial products revealed – apart from typical odor compounds previously found like aldehydes, ketones acids various organic sulfur odorants at very small concentrations (≪1 μg/m3) not allowing...
This article reports a novel photocatalytic lime render for indoor and outdoor air quality improvement that is composed of binder doped TiO2 (KRONOClean 7000®) nanoparticles. These nanoparticles were distributed throughout the bulk finishing render, instead as thin coating, thus ensuring durability properties upon superficial damage. The physical these renders not affected by addition except in case surface area, which increased significantly. In terms their activity, shown to degrade up 12%...