Bibliografie tematiche / Olfactometry

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Letteratura scientifica selezionata sul tema "Olfactometry"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 agosto 2024

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Articoli di riviste sul tema "Olfactometry"

McGinley, M. A., e C. M. McGinley. "Comparison of field olfactometers in a controlled chamber using hydrogen sulfide as the test odorant". Water Science and Technology 50, n. 4 (1 agosto 2004): 75–82. http://dx.doi.org/10.2166/wst.2004.0225.

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A standard method for measuring and quantifying odour in the ambient air utilizes a portable odour detecting and measuring device known as a field olfactometer (US Public Health Service Project Grant A-58-541). The field olfactometer dynamically dilutes the ambient air with carbon-filtered air in distinct ratios known as “Dilutions-to-Threshold” dilution factors (D/Ts), i.e. 2, 4, 7, 15, etc. Thirteen US states and several cities in North America currently utilize field olfactometry as a key component of determining compliance to odour regulations and ordinances. A controlled environmental chamber was utilized, with hydrogen sulfide as the known test odorant. A hydrogen sulfide environment was created in this controlled chamber using an Advanced Calibration Designs, Inc. Cal2000 Hydrogen Sulfide Generator. The hydrogen sulfide concentration inside the chamber was monitored using an Arizona Instruments, Inc. Jerome Model 631 H2S Analyzer. When the environmental chamber reached a desired test concentration, test operators entered the chamber. The dilution-to-threshold odour concentration was measured using a Nasal Ranger Field Olfactometer (St Croix Sensory, Inc.) and a Barnebey Sutcliffe Corp. Scentometer. The actual hydrogen sulfide concentration was also measured at the location in the room where the operators were standing while using the two types of field olfactometers. This paper presents a correlation between dilution-to-threshold values (D/T) and hydrogen sulfide ambient concentration. For example, a D/T of 7 corresponds to ambient H2S concentrations of 5.7-15.6 μg/m3 (4-11 ppbv). During this study, no significant difference was found between results obtained using the Scentometer or the Nasal Ranger® (r = 0.82). Also, no significant difference was found between results of multiple Nasal Ranger® users (p = 0.309). The field olfactometers yielded hydrogen sulfide thresholds of 0.7-3.0 μg/m3 (0.5-2.0 ppbv). Laboratory olfactometry yielded comparable thresholds of 0.64-1.3 μg/m3 (0.45-0.9 ppbv). These thresholds are consistent with published values.

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Castillo, John S., Anthony J. Bellantuono e Matthew DeGennaro. "Quantifying Mosquito Attraction Behavior Using Olfactometry". Cold Spring Harbor Protocols 2023, n. 10 (6 aprile 2023): pdb.top107660. http://dx.doi.org/10.1101/pdb.top107660.

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When blood feeding from human hosts, female mosquitoes can transmit life-threatening pathogens to humans, including dengue virus, chikungunya virus, and Zika virus. Olfaction is the primary sense mosquitoes use to locate and differentiate hosts and studying it can lead to new strategies to reduce the risk of disease. To effectively study host-seeking behavior in mosquitoes, a repeatable, quantitative assay that isolates olfaction from other cues is critical for interpreting mosquito behavior. Here, we contribute an overview of methods and best practices for the study of mosquito attraction (or lack thereof) by using olfactometry to quantify behavior. In the accompanying protocols, we present an olfactory-based behavioral assay using a uniport olfactometer that measures mosquito attraction rate to specific stimuli. We include construction details, setup of the uniport olfactometer, details of the behavioral assay, and data analysis guidelines, as well as how to prepare the mosquitoes before their introduction into the olfactometer. This uniport olfactometer behavioral assay is currently one of the most reliable methods to study mosquito attraction to a single olfactory stimulus.

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Barczak, Radosław J., e Andrzej Kulig. "Comparison of different measurement methods of odour and odorants used in the odour impact assessment of wastewater treatment plants in Poland". Water Science and Technology 75, n. 4 (10 dicembre 2016): 944–51. http://dx.doi.org/10.2166/wst.2016.560.

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The aim of this study was to compare sensory and analytical methods used to measure odour and odorants concentrations for odour impact assessment on municipal wastewater treatment plants (WWTPs). A range of sources and odour or odorants concentrations were used to compare the methods. Four different odours and odorants measurement methods were compared: field olfactometry using Nasal Ranger® field olfactometer, dynamic olfactometry according to PN-EN 13725:2007 standard, colorimetric assays (hydrogen sulphide, ammonia) and gas chromatography-mass spectrometry (GC-MS) methods (methanethiol, ethanethiol, dimethyl sulphide). Mechanical-biological and mechanical-biological-chemical WWTPs were chosen. Receptor points were selected inside of ‘closed’ facilities of the technological line (screening rooms, mechanical thickening and dewatering building) and downwind at ‘open’ facilities (collection chambers, sand trap, mechanical thickeners) which were the most significant regarding the potential for odour nuisance. By the research, it is not possible to specify explicit dependencies between results obtained from different research methods used in the odour impact assessment of WWTPs. A strong correlation (Pearson's correlation coefficient was equal R = 0.79) was determined only once between odour concentrations measured by dynamic olfactometry and methanethiol concentrations in the screen room at the WWTP No. 3.

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Kulig, Andrzej, Mirosław Szyłak-Szydłowski e Marta Wiśniewska. "Application of Chemical Sensors and Olfactometry Method in Ecological Audits of Degraded Areas". Sensors 21, n. 18 (15 settembre 2021): 6190. http://dx.doi.org/10.3390/s21186190.

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Mineral excavation is a common process throughout the world. The open pits remaining after the closure of a mine require well-considered and meticulous reclamation activities aimed at restoring the environmental properties of a given area. The inspections carried out in Poland indicate numerous irregularities in implementing the reclamation process. The research in this study was conducted in six measurement series and includes both chemical and olfactometry determinations by devices: multisensor portable gas detector and field olfactometer. Statistical analysis of the results obtained show high concentrations in ambient air of both chemical compounds (NH3, VOCs, H2S, CH3SH) and odour, excluding the possibility of occurrence in the pit of only waste types contained in the administrative decision on reclamation. In addition to the unpleasant odour, the listed compounds can have dangerous effects on the health and life of living organisms. This paper presents a suitable method of control and detection of irregularities in the conducted processes. The main advantage is the relatively low cost of purchasing sensors and field olfactometers compared to other devices, and the possibility to test the polluted air in situ, without the risk of chemical processes occurring during transport of gas samples to the laboratory.

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Polvara, Elisa, Baharak Essna ashari, Laura Capelli e Selena Sironi. "Evaluation of Occupational Exposure Risk for Employees Working in Dynamic Olfactometry: Focus On Non-Carcinogenic Effects Correlated with Exposure to Landfill Emissions". Atmosphere 12, n. 10 (11 ottobre 2021): 1325. http://dx.doi.org/10.3390/atmos12101325.

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This work aims to evaluate the non-carcinogenic health effects related to landfill odor emissions, therefore focusing on workers involved in dynamic olfactometry. Currently, the most common technique to quantify odor emissions is dynamic olfactometry, a sensorial analysis involving human assessors. During the analysis, assessors are directly exposed, at increasing concentrations, to odor samples, and thus to the hazardous pollutants contained therein. This entails the need to estimate the associated exposure risk to guarantee examiners’ safety. Therefore, this paper evaluates the exposure risk for olfactometric examiners to establish the minimum dilution level to be adopted during the analysis of landfills’ odorous samples to guarantee panelists’ safety. For this purpose, an extensive literature review regarding the pollutants emitted by landfill odor sources was conducted, comparing compounds’ chemical concentrations and threshold limit values (TLVs) to calculate the Hazard Index (HI) and thus establish a minimum dilution value. The data collected indicate that a non-negligible non-carcinogenic risk exists for all landfill emissions considered. However, from the data considered, the minimum dilution factor to be adopted is lower than the typical odor concentration observed for these sources. Therefore, the olfactometric analysis of landfill samples can be generally conducted in safe conditions.

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Delahunty, Conor M., Graham Eyres e Jean-Pierre Dufour. "Gas chromatography-olfactometry". Journal of Separation Science 29, n. 14 (settembre 2006): 2107–25. http://dx.doi.org/10.1002/jssc.200500509.

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Ishimaru, Tadashi, Takaki Miwa, Takefumi Shimada e Mitsuru Furukawa. "Electrically Stimulated Olfactory Evoked Potential in Olfactory Disturbance". Annals of Otology, Rhinology & Laryngology 111, n. 6 (giugno 2002): 518–22. http://dx.doi.org/10.1177/000348940211100607.

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Olfactory evoked potential is considered a useful method of electrophysiological olfactometry for the diagnosis of olfactory disturbance. However, electrophysiological olfactometry is not as widely used as electrophysiological audiometry, such as the auditory brain stem response, because odor stimulation is difficult to perform. In contrast, electrical pulse stimulation is easy to perform, and its evoked potential is also easily recorded by the averaging method. We recorded olfactory evoked potentials from the scalp produced by electrical stimulation on the olfactory mucosa and investigated the relationship between this electrical olfactory evoked potential (EOEP) and the results of Toyoda and Takagi's perfumist's strip method (T&T) olfactometry, which is a standard Japanese means of psychophysical olfactometry. In EOEP-detectable cases, the detection and cognitive thresholds of T&T olfactometry were 1.32 ± 1.99 (mean ± SD; n = 10) and 3.02 ± 1.64 (n = 10), respectively. But in the undetectable cases, the thresholds were 4.67 ± 2.03 (n = 8; 5.8 means off the scale) and 5.80 ± 0.00 (n = 8), respectively. The differences between the T&T thresholds of EOEP-detectable and -undetectable cases were significant. We concluded that EOEP is suitable for electrophysiological olfactometry.

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Kitson, Jennifer, Monica Leiva, Zachary Christman e Pamela Dalton. "Evaluating Urban Odor with Field Olfactometry in Camden, NJ". Urban Science 3, n. 3 (18 agosto 2019): 93. http://dx.doi.org/10.3390/urbansci3030093.

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Odor annoyance negatively impacts residents of communities adjacent to persistent nuisance industries. These residents, often with a high percentage of minority or otherwise marginalized residents, experience subjective and objective impacts on health and well-being; yet, reliable methods for quantifying and categorizing odors have been elusive. Field olfactometry is integral to the study of odor annoyance experienced by communities as it includes both qualitative (human perception) and quantitative (intensity measurement) dimensions of human odor experience and has been employed by municipalities in the U.S. to evaluate odor pollution levels. Cartographic visualization of odor data recorded using a field olfactometer offers further opportunity to evaluate potential patterns of odor annoyance, yet the use of field olfactometry and geographic information systems have not been frequently employed by geographers. By employing a mixed-methods approach to evaluate odor pollution, this study addresses the environmental justice context by quantifying and categorizing the presence of odor pollution in Waterfront South, a neighborhood in Camden, NJ previously identified for its disproportionate malodor burden. This study offers support to mixed methods research and the need for monitoring subjective and objective impacts in communities with compounding odor nuisance industries.

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Popp, Roland, Monika Sommer, Jürgen Müller e Göran Hajak. "Olfactometry in fMRI studies: odor presentation using nasal continuous positive airway pressure". Acta Neurobiologiae Experimentalis 64, n. 2 (30 giugno 2004): 171–76. http://dx.doi.org/10.55782/ane-2004-1503.

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We describe a method for generating and presenting olfactory stimuli in functional magnetic resonance imaging (fMRI) studies for humans. The olfactometer is based on principles of air dilution olfactometry and consists of a nasal mask and a nasal Continuous Positive Airway Pressure device, both normally used for patients suffering from obstructive sleep apnea syndrome. The system allows online monitoring and recording of the subject's breathing pattern. Switching between different olfactory conditions can easily be synchronized with the inhalation phase and be controlled by a computer. Besides, switching occurs rapidly and without any optical, acoustic, thermal, or tactile cues for the subject. As an example of implementation we present a fMRI trial of olfaction using pleasant and unpleasant odor stimuli to induce different affective states in healthy subjects. The relatively inexpensive olfactometer is reliable and permits constant odor concentrations during the inherently prolonged imaging studies.

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Pacharra, Marlene, Stefan Kleinbeck, Michael Schäper, Christine I. Hucke e Christoph van Thriel. "Sniffin’ Sticks and Olfactometer-Based Odor Thresholds for n-Butanol: Correspondence and Validity for Indoor Air Scenarios". Atmosphere 11, n. 5 (7 maggio 2020): 472. http://dx.doi.org/10.3390/atmos11050472.

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Threshold assessments for the reference odorant n-butanol are an integral part of various research, clinical, and environmental sensory testing procedures. However, the practical significance of a high or low threshold for n-butanol beyond a particular testing environment and procedure are often unclear. Therefore, this study aimed to determine between-method correlations and to investigate the association between the n-butanol threshold and perceptual/behavioral odor effects in natural breathing scenarios in 35 healthy adults. The thresholds for n-butanol derived from the Sniffin’ Sticks test and determined by the ascending limit dynamic dilution olfactometry procedure were significantly correlated (∣r∣ = 0.47). However, only the thresholds determined by olfactometry were significantly correlated to the odor detection of n-butanol in an exposure lab. Moreover, participants with a higher sensitivity for n-butanol in the olfactometer-based assessment rated ammonia, during a 75 min exposure, to be more unpleasant and showed better performance in a simultaneous 3-back task than participants with lower sensitivity. The results of this study suggest that beyond the strict parameters of a certain psychophysical procedure, the threshold for n-butanol can be a meaningful indicator of odor detection and effects in some cases.

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Tesi sul tema "Olfactometry"

Носова, Я. В., N. D. Evstratov e О. Г. Аврунін. "Modern methods of olfactometry diagnostic". Thesis, Кременчцький національний університет ім. Михайла Остроградського, 2016. http://openarchive.nure.ua/handle/document/7389.

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Большинство методов оценки обонятельных расстройств имеют широкий спектр применения для диагностики различных заболеваний, в том числе психических расстройств, повреждения головного мозга и нервной системы. Однако , необходимо рассмотреть обонятельную дисфункцию в связи с проблемой блокирования воздушного канала в обонятельной системе человека. Поэтому необходимо разработать узкоспециализированный метод оценки обонятельно-респираторных заболеваний, которые имели бы высокую степень объективности для использования в клинической практике оториноларингологов.

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Davies, Ceri Wyn. "A theoretical and experimental investigation into objective olfactometry". Thesis, University of the West of England, Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387407.

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Seebungkert, Benchamaporn. "The physiological regulation of the voltage gated K+ and Na+ channels in olfactory receptor neurons /". St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16428.pdf.

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Sokolic, Ljiljana. "Olfactory discrimination in the rat odour masking phenomena and the disruptive effects of benzodiazepines and cannabinoids /". Connect to full text, 2008. http://ses.library.usyd.edu.au/handle/2123/4986.

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Thesis (Ph. D.)--University of Sydney, 2009.
Includes graphs and tables. Includes list of publications and three published articles co-authored with others. Title from title screen (viewed June 9, 2009) Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Psychology. Degree awarded 2009; thesis submitted 2008. Includes bibliographical references. Also available in print form.

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Williams, Jacqueline C. (Jacqueline Clare). "Human olfactory memory : effect of temporal-lobe lesions on immediate and delayed recognition of odours". Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59906.

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Odour recognition memory was studied in 49 patients with unilateral temporal lobe excision, and 20 control subjects. Odours were presented monorhinally to explore any asymmetry in performance between nostrils, and to test for hemispheric differences between patients with excision from the right versus the left temporal lobe. Testing was by a 2-alternative, forced-choice procedure, immediately after presentation and 24 hours later. A discrimination test was carried out at the conclusion of the memory test, and nondiscriminated odours were excluded from the final memory scores. The contribution of the hippocampus to odour memory was investigated by dividing patient groups according to the size of hippocampal excision. The memory test showed that only patients with excision from the left temporal lobe that included a large hippocampal removal were impaired after 24 hours. The discrimination test revealed deficits only for patients with right temporal lobectomy, and only in the right nostril.

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Wise, Paul M. "Latency and accuracy of same-different discriminations of odor quality between binary mixtures and their components /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p9992387.

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Cotte, Virginie. "Flavour analysis of tobacco smoke by GC-Olfactometry and by nosespace-APCI-MS". Thesis, University of Nottingham, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490826.

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The aroma quality of cigarette smoke is an important characteristic for smokers. It is therefore critical to understand the nature of the key aroma compounds in tobacco smoke and to identify them. Also, knowing how flavour compounds in tobacco smoke are released and how they persist in the nose of smokers would help in designing cigarettes with optimised flavour release for the consumer. One approach is to use Gas Chromatography with Olfactometry detector (GC-0). The GC-Olfactometry technique and the Nasal Impact Frequency (NIF) method were proven to be applicable in analysing the aroma of complex matrices such as tobacco smoke.

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Thomas, Rhiannon D. "Olfactory matching-to-sample in rats using a novel apparatus /". Electronic version (PDF), 2006. http://dl.uncw.edu/etd/2006/thomasr/rhiannonthomas.pdf.

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Legha, Prem, University of Western Sydney, of Science Technology and Environment College e of Science Food and Horticulture School. "Molecular structure and odor mixture perception". THESIS_CSTE_SFH_Legha_P.xml, 2004. http://handle.uws.edu.au:8081/1959.7/549.

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The sense of smell is a primal sense for humans as well as animals.In everyday life the smells encountered are composed of dozens, even hundreds of odors; few arise from a single odorant. Enormous numbers of odors occur due to the vast variation in the concentration, size and structure of odorant molecules that makes olfaction differ from simpler visual or auditory dimensions. Accordingly, little is known about the ways in which changes in molecular structure and concentration of individual odorants change odor quality. Also, currently not much is understood about synergism/antagonism, how one odorant masks or suppresses another in mixtures and there is no method for predicting which odor will be suppressed. The two main objectives of this thesis were to determine whether a part of a molecular structure rather than the whole structure plays a key role in odor quality and whether a key part of a molecule can be used to choose antagonists for that odorant. For this study three classes of musks and two potential antagonists were used. The results of the study are discussed in some detail. It is concluded that future studies of the importance of molecular structure in mixture interactions require substantially more information on the relation between structure and odor quality to allow systematic studies to be developed. In summary the two hypotheses investigated were not supported by the results. Importantly, however, they do support the view that it is likely that odor quality is dependent on the whole structure of an odorant not a single feature.
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Stitzel, Shannon E. "Microsphere array-based artificial nose : a continuing study toward multiple applications /". Thesis, Connect to Dissertations & Theses @ Tufts University, 2003.

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Thesis (Ph.D.)--Tufts University, 2003.
Adviser: David R. Walt. Submitted to the Dept. of Chemistry. Includes bibliographical references. Access restricted to members of the Tufts University community. Also available via the World Wide Web;

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Libri sul tema "Olfactometry"

Leland, Jane V., Peter Schieberle, Andrea Buettner e Terry E. Acree, a cura di. Gas Chromatography-Olfactometry. Washington, DC: American Chemical Society, 2001. http://dx.doi.org/10.1021/bk-2001-0782.

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V, Leland Jane, a cura di. Gas chromatography-olfactometry: The state of the art. Washington, D.C: American Chemical Society, 2001.

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Institution, British Standards. Air quality: Determination of odour concentration by dynamic olfactometry. London: British Standards Institution, 1999.

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International Symposium on Olfaction and the Electronic Nose (8th 2001 Washington, D.C.). Artificial chemical sensing: Olfaction and the electronic nose (ISOEN 2001) : proceedings of the eighth international symposium. A cura di Stetter J. R, Penrose W. R e Electrochemical Society Sensor Division. Pennington, NJ: Electrochemical Society, 2001.

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Germany) International Symposium on Olfaction and the Electronic Nose (6th 1999 Tübingen. The 6th International Symposium, Olfaction & Electronic Nose 99: And the 1st Workshop of the Network of Excellence on Artificial Olfactory Sensing Nose : Tübingen, Germany, September 20-22, 1999. A cura di Weimar U. (Udo), Frank Michael e Network of Excellence on Artificial Olfactory Sensing Nose (Organization). Workshop. Tübingen, Germany: Institute of Physical Chemistry of the University of Tübingen, 1999.

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Gardner, J. W. Electronic noses: Principles and applications. Oxford: Oxford University Press, 1999.

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International Symposium on Olfaction and the Electronic Nose (14th 2011 New York, N.Y.). Olfaction and Electronic Nose: Proceedings of the 14th International Symposium on Olfaction and Electronic Nose, New York City, NY, USA, 2-5 May 2011. A cura di Gouma Pelagia-Irene. Melville, N.Y: American Institute of Physics, 2011.

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International, Symposium on Olfaction and the Electronic Nose (5th 1998 Baltimore Md ). Electronic noses & sensor array based systems: Design & applications : proceedings of the 5th International Symposium on Olfaction and the Electronic Nose. Lancaster, PA: Technomic Pub. Co., 1999.

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Nakamoto, Takamichi. Human olfactory displays and interfaces: Odor sensing and presentation. Hershey, Pa: Information Science Reference, 2013.

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M, Niemeyer, Robers A, Thiesen P. H, Schlegelmilch M e Germany. Bundesministerium für Bildung und Forschung., a cura di. Erfassung und Minimierung von Gerüchen: Dokumentation des Seminars vom 09.-10. September 2004 in Hamburg im Rahmen des Verbundprojektes : Minimierung von Geruchsemissionen aus Landwirtschaft und der Lebensmittelindustrie. Stuttgart: Verlag Abfall Aktuell, 2004.

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Capitoli di libri sul tema "Olfactometry"

Flores, Mónica, e Sara Corral. "Olfactometry Detection of Aroma Compounds". In Advances in Food Diagnostics, 379–400. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119105916.ch15.

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Mahattanatawee, Kanjana, e Russell Rouseff. "Gas Chromatography/Olfactometry (GC/O)". In Practical Analysis of Flavor and Fragrance Materials, 69–90. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781444343137.ch4.

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Mayol, A. R., e T. E. Acree. "Advances in Gas Chromatography-Olfactometry". In ACS Symposium Series, 1–10. Washington, DC: American Chemical Society, 2001. http://dx.doi.org/10.1021/bk-2001-0782.ch001.

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Friedrich, Jane E., e Terry E. Acree. "Issues in Gas Chromatography-Olfactometry Methodologies". In Flavor Chemistry, 124–32. Washington DC: American Chemical Society, 2000. http://dx.doi.org/10.1021/bk-2000-0756.ch009.

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Friedrich, Jane E., Terry E. Acree e Edward H. Lavin. "Selecting Standards for Gas Chromatography-Olfactometry". In ACS Symposium Series, 148–55. Washington, DC: American Chemical Society, 2001. http://dx.doi.org/10.1021/bk-2001-0782.ch013.

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Aviles-Rosa, Edgar O., Vidia Gokool, Nathaniel Hall e Lauryn DeGreeff. "Canine Olfactometry: Tools, Techniques, and Procedures". In Olfactory Research in Dogs, 85–118. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-39370-9_5.

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Deibler, K. D., T. E. Acree e E. H. Lavin. "Gas Chromatography—Olfactometry (GC/O) of Vapor Phases". In Flavor Chemistry, 387–95. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4693-1_33.

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Iwabuchi, Hisakatsu, Yuriko Imayoshi, Yasue Yoshida e Hiroshi Saeki. "Application of Gas Chromatography-Olfactometry to Flavor Creation". In ACS Symposium Series, 11–22. Washington, DC: American Chemical Society, 2001. http://dx.doi.org/10.1021/bk-2001-0782.ch002.

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Ferreira, V., R. López e M. Aznar. "Olfactometry and Aroma Extract Dilution Analysis of Wines". In Analysis of Taste and Aroma, 89–122. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04857-3_6.

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Friedrich, Jane E., e Terry E. Acree. "Analyzing Carotenoid-Derived Aroma Compounds Using Gas Chromatography—Olfactometry". In ACS Symposium Series, 67–74. Washington, DC: American Chemical Society, 2001. http://dx.doi.org/10.1021/bk-2002-0802.ch005.

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Atti di convegni sul tema "Olfactometry"

Stolz-Fink, Maximilian R. W., Kai Johannes Lorenz, Sandra Schmidt e Jörg M. Nebel. "Objective olfactometry in corona-induced Hyposmia". In 95th Annual Meeting German Society of Oto-Rhino-Laryngology, Head and Neck Surgery e. V., Bonn. Georg Thieme Verlag KG, 2024. http://dx.doi.org/10.1055/s-0044-1785104.

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Robin C Brandt, Herschel A Elliott, Maria Arlene A Adviento-Borbe, Eileen F Wheeler, Peter J. A Kleinman e Douglas B Beegle. "Field Olfactometry Assessment of Dairy Manure Land Application Methods". In 2008 Providence, Rhode Island, June 29 - July 2, 2008. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2008. http://dx.doi.org/10.13031/2013.25172.

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McGinley, M. A., e D. McGinley. "108. Olfactometry Fundamentals and Applications: Diary of Odor Sample 101". In AIHce 1998. AIHA, 1999. http://dx.doi.org/10.3320/1.2762489.

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MIELCAREK, Paulina, Wojciech RZEŹNIK e Zbyszek ZBYTEK. "THE EFFECT OF SOLID MANURE INCORPORATION INTO THE SOIL ON THE EMISSION OF GASES AND ODOURS". In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.098.

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The aim of the study was to determine the level of emission reduction of selected harmful gases and odours following immediate manure incorporation into soil, using the prototype manure applicator. The research was carried out at the Experimental Station of the National Research Institute of Animal Production, in September 2016. Two experimental fields size 6 x 100 m were located on corn stubble in the distance of 40 m. In field A, the solid manure was incorporated into the soil using the prototype manure applicator. In field B, manure application was made by manure spreader. The prototype manure applicator was designed and made by Industrial Institute of Agricultural Engineering. The concentration of harmful gases (NH3, CO2, CH4, N2O) and odours was measured during the study. Measurements were made in the following periods: immediately after application and 2, 4, 6, 10 and 14 hours after application. The concentration of studied gases was measured immediately after sampling by the photoacoustic spectrometer (Multi Gas Monitor Innova 1312). The odours concentration was determined within 30 hours after air sampling by dynamic olfactometry using the TO 8 olfactometer. The solid manure incorporation reduced NH3 emissions by an average of 66%. For the other studied gases the differences in concentration were too small or this concentration was similar to concentration of these gases in surrounding air. The incorporation of solid manure limited also odour emissions. The level reduction decreased with time and amounted to an average of 25%.

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Meišutovic-Akhtarieva, Marija, e Eglė Marčiulaitienė. "Research on Odours Emitted from Non-Hazardous Waste Landfill Using Dynamic Olfactometry". In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.034.

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The article analyses the existing research on odour emissions from the passive odour source – municipal landfill for non-hazardous waste. The current research has been carried out in the Vilnius county, at the Kazokiškės landfill for regional municipal waste. Odour emissions were analysed using samples from waste of different age and at different outdoor air temperatures. The investigation determined the concentration of odourous volatile organic compounds (VOCs) formed in the landfill (mg/m3) and odour emissions (OUe/m2s). The odour concentration varied between 0.02 OUe/m2s (from 9 year old waste at 11oC) to 1.29 OUe/m2s (from 0–3 year old waste at minus 1 oC and minus 10 oC). It was determined that as temperature decreases (within the range of 11 to minus 10 oC), the concentration of odour emissions increases. The coefficient of correlation between the temperature of environment and the concentration of odours emitted from the landfill stood at minus 0.91.

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David B. Parker, Marty B. Rhoades, Brent W. Auvermann e Jacek Koziel. "Odor Characterization at Open-Lot Beef Cattle Feedyards Using Triangular Forced Choice Olfactometry". In 2003, Las Vegas, NV July 27-30, 2003. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2003. http://dx.doi.org/10.13031/2013.14107.

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Burbano, Johana, e Giselle Eraso. "Design and evaluation of the instrumentation necessary for the application of dynamic olfactometry methodology". In 2019 Congreso Colombiano y Conferencia Internacional de Calidad de Aire y Salud Pública (CASP). IEEE, 2019. http://dx.doi.org/10.1109/casap48673.2019.9364029.

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Donald W. Wright, David K. Eaton, Lawrence T. Nielsen, Fred W. Kuhrt, Jacek A. Koziel, Jarett P. Spinhirne e David B. Parker. "Multidimensional Gas Chromatography-Olfactometry for Identification and Prioritization of Malodors from Confined Animal Feeding Operations". In 2004, Ottawa, Canada August 1 - 4, 2004. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2004. http://dx.doi.org/10.13031/2013.16813.

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Koziel, Jacek A., Lingshuang Cai, Donald W. Wright, Steven J. Hoff, Matteo Pardo e Giorgio Sberveglieri. "Field Air Sampling with SPME for Ranking and Prioritization of Downwind Livestock Odors with MDGC-MS-Olfactometry". In OLFACTION AND ELECTRONIC NOSE: Proceedings of the 13th International Symposium on Olfaction and Electronic Nose. AIP, 2009. http://dx.doi.org/10.1063/1.3156540.

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Zhang, Shicheng, Lingshuang Cai, Jacek A. Koziel, Steven Hoff, Charles Clanton, David Schmidt, Larry Jacobson et al. "Field Air Sampling and Simultaneous Chemical and Sensory Analysis of Livestock Odorants with Sorbent Tube GC-MS∕Olfactometry". In OLFACTION AND ELECTRONIC NOSE: Proceedings of the 13th International Symposium on Olfaction and Electronic Nose. AIP, 2009. http://dx.doi.org/10.1063/1.3156514.

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Rapporti di organizzazioni sul tema "Olfactometry"

Bulliner, Edward A., Jacek A. Koziel, Lingshuang Cai e Donald Wright. Characterization of Livestock Odors Using Steel Plates, Solid Phase Microextraction, and Multidimensional-Gas Chromatography-Mass Spectrometry-Olfactometry. Ames (Iowa): Iowa State University, gennaio 2007. http://dx.doi.org/10.31274/ans_air-180814-272.

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Koziel, Jacek A., Lingshuang Cai, Don Wright e Steven J. Hoff. Solid-Phase Microextraction as a Novel Air Sampling Technology for Improved, GC-Olfactometry-Based, Assessment of Livestock Odors. Ames (Iowa): Iowa State University, gennaio 2007. http://dx.doi.org/10.31274/ans_air-180814-280.

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Zhang, Shicheng, Lingshuang Cai e Jacek A. Koziel. Characterization and Quantification of Livestock Odorants using Sorbent Tube Sampling and Thermal Desorption coupled with Multidimensional Gas Chromatography–Mass Spectrometry–Olfactometry. Ames (Iowa): Iowa State University, gennaio 2009. http://dx.doi.org/10.31274/ans_air-180814-271.

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Cai, Lingshuang, Jacek A. Koziel, Yin-Cheung Lo e Steven J. Hoff. Characterization of Volatile Organic Compounds and Odorants Associated with Swine Barn Particulate Matter Using Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry-Olfactometry. Ames (Iowa): Iowa State University, gennaio 2007. http://dx.doi.org/10.31274/ans_air-180814-275.

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Lo, Yin-Cheung, Jacek A. Koziel, Lingshuang Cai, Steven J. Hoff, William S. Jenks e Hongwei Xin. Simultaneous Chemical and Sensory Characterization of VOCs and Semi-VOCs Emitted from Swine Manure Using SPME and Multidimensional Gas Chromatography-Mass Spectrometry-Olfactometry. Ames (Iowa): Iowa State University, gennaio 2007. http://dx.doi.org/10.31274/ans_air-180814-276.

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Cai, Lingshuang, Jacek A. Koziel, Jeremiah Davis, Yin-Cheung Lo e Hongwei Xin. Characterization of Volatile Organic Compounds and Odors by in vivo Sampling of Beef Cattle Rumen Gas Using Solid Phase Microextraction and Gas Chromatography-Mass Spectrometry-Olfactometry. Ames (Iowa): Iowa State University, gennaio 2007. http://dx.doi.org/10.31274/ans_air-180814-58.

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Naim, Michael, Gary R. Takeoka, Haim D. Rabinowitch e Ron G. Buttery. Identification of Impact Aroma Compounds in Tomato: Implications to New Hybrids with Improved Acceptance through Sensory, Chemical, Breeding and Agrotechnical Techniques. United States Department of Agriculture, ottobre 2002. http://dx.doi.org/10.32747/2002.7585204.bard.

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The tomato, a profitable vegetable crop in both the USA and Israel, has benefited significantly from intensive breeding efforts in both countries, and elsewhere (esp. Holland). : Modem hybrids are highly prolific and resistant to a variety of major pests. They produce attractive, firm fruit for both processing and fresh-marketing. In all cases, however, reduction in flavor and aroma have occurred concomitantly with the increase in yield. Sugars-acids ratio dominate fruit taste, whereas aroma volatiles (potent at minute ppb and ppt levels) contribute to the total characteristic tomato flavor. An increase in sugars (1-2%) contributes significantly to tomato fruit taste. However, because of energy reasons, an increase in fruit sugars is immediately compensated for by a decrease in yield. Our main objectives were to: (a) pinpoint and identify the major impact aroma components of fresh tomato; (b) study the genetic and environmental effects on fruit aroma; (c) determine precursors of appealing (flavors) and repelling (off-flavors) aroma compounds in tomato. Addition of saturated salts blocked all enzymatic activities prior to isolation of volatiles by dynamic and static headspace, using solvent assisted flavor evaporation (SAFE) and solid phase micro-extraction (SPME) from highly favored (FA-612 and FA-624) and less preferred (R 144 and R 175) tomato genotypes. Impact aroma components were determined by gas chromatography-olfactometry (GC-O), gas chromatography-mass spectrometry (GC- MS) and aroma extract dilution analysis (AEDA). The potent odorant (Z)-1,5-octadien-3-one, was identified for the first time in fresh tomato. From the ca. 400 volatile compounds in the headspace of fresh tomato, the following compounds are proposed to be impact aroma compounds: (Z)-3-hexenal, hexanal, 1-penten-3-one, 2-phenylethanol, (E)-2-hexenal, phenyl acetaldehyde, b-ionone, b-damascenone, 4-hydroxy-2,5-dimethyl-3-(2H)-furanone (FuraneolR), (Z)-l,5-octadien-3-one, methional, 1-octen-3-one, guaiacol, (E,E)- and (E,Z)- 2,4-decadienal and trans- and cis-4,5-EPOXY -(E)-2-decenal. This confirms the initial hypothesis that only a small number of volatiles actually contribute to the sensation of fruit aroma. Tomato matrix significantly affected the volatility of certain impact aroma components and thus led to the conclusion that direct analysis of molecules in the headspace . may best represent access of tomato volatiles to the olfactory receptors. Significant differences in certain odorants were found between preferred and less-preferred cultivars. Higher consumer preference was correlated with higher concentrations of the following odorants: l-penten-3-one, (Z)-3-hexenal, (E,E)- and (E,Z)-2,4-decadienal and especially Furaneol, whereas lower consumer preference was associated with higher concentrations of methional, 3-methylbutyric acid, phenylacetaldehyde, 2-phenylethanol, and 2-isobutylthiazole. Among environmental factors (salinity, N source, growth temperature), temperature had significant effects on the content of selected aroma compounds (e.g., 3-methylbutanal, 1- penten-3-one, hexanal, (Z)-3-hexenal, (E)-2-hexenal, 2-isobutylthiazole, 6-methyl-5-hepten- 2-one, 1-octen-3-one, methional, 2-phenylethanal, phenyl acetaldehyde, and eugenol) in fresh tomatoes. Salt stress (20 mM NaCl) increased the content of odorants such as (Z)-3-hexenal, 2-phenylethanol and 3-methylbutanal in the R-144 cultivar whereas salinity had minor effects on 1-pentene-3-one, 2-isobutylthiazole and b-ionone. This fundamental knowledge obtained by comprehensive investigation, using modem chemical, sensory and agrotechnical methodology will assist future attempts to genetically modify the concentrations of key odorants in fresh tomatoes, and thus keep the tomato production of Israel and the USA competitive on the world market.

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Horton, David, Victoria Soroker, Peter Landolt e Anat Zada Byers. Characterization and Chemistry of Sexual Communication in Two Psyllid Pests of Pears (Homoptera: Psyllidae). United States Department of Agriculture, agosto 2011. http://dx.doi.org/10.32747/2011.7592653.bard.

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Pear-feeding psyllids in the genus Cacopsylla (Hemiptera: Psyllidae) are among the most important arthropod pests of pears worldwide. These pests are exceedingly difficult to control, and new management tools are needed. Sex attractantpheromones have been used in IPM programs for pests of pome fruits (especially Lepidoptera), but not as yet for pest Hemiptera. Results of the current project showed that males of two psyllid pests of pears, Cacopsylla bidens (Israel) and Cacopsylla pyricola (North America), use volatile or semi-volatile compounds to locate female psyllids for mating. For both species, the attractants can be collected from the cuticle of females by washing live female psyllids with an appropriate solvent. Analysis of these washes by gas chromatography – mass spectrometry led to the following discoveries: Psyllid cuticles contain a mix of hydrocarbons, straight chain and branched alkanes, and long chain aldehydes The two species have different chemical profiles Chemical profiles change seasonally and with reproductive status Chemical profiles differ between male and reproductive female psyllids Several specific compounds found to be more abundant in attractive females than males were identified and synthesized. Behavioral assays (olfactometer) were then used to determine whether these compounds were attractive to males. Two compounds showed promise as attractants for male psyllids: 7-methylheptacosane (C. bidens) and 13-methylheptacosane (C. pyricola and C. bidens). These are the first sex attractantpheromones identified for any psyllid species. Field tests showed that the chemicals could be used to attract males under orchard conditions, but that effectiveness in the field appeared to be seasonally variable. Future research plans include: (a) test mixtures of compounds; (b) explore seasonality in field response to compounds; (c) determine whether chirality of the two compounds affects their attractiveness; and (d) compare different types of traps and release devices to optimize lure performance.

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