Perceptual characteristics of binary, trinary, and quaternary odor mixtures consisting of unpleasant constituents

Laing, David G.; Eddy, Andrew; Best, D. J.

doi:10.1016/0031-9384(94)90264-x

Cited by 59 publications

(38 citation statements)

References 7 publications

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“…We speculate that systematic variation in slope arises from the diversity of olfactory receptors stimulated by even a single VOC. The perception of mixtures offers potential insight here [42,43]; the more complex a mixture, the more compression, or mutual suppression of components, will it exhibit [44,45], presumably because more complex mixtures stimulate wider varieties of receptors. The outputs from different receptor neurons most likely exhibit mutual inhibition upstream [46,47].…”

Section: Slopes Of Psychometric Functions: An Interpretationmentioning

confidence: 99%

Chemesthesis from volatile organic compounds: Psychophysical and neural responses

Cain

Lee

Wise

et al. 2006

Physiology & Behavior

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In Experiment 1, subjects sought to localize the nostril stimulated, left or right, in tests with nine esters (acetates, propionates, and butyrates) at concentrations meant to trigger chemesthesis (pungency, irritation). The task produced psychometric functions for chemesthetic detection unconfounded by olfactory sensations. The functions indicated a sharp transition from no detection to perfect detection, rather uniform across the esters, which themselves varied in potency by two log units. The correlation between the thresholds for the eight materials that yielded thresholds and predictions from a published linear free energy relationship (LFER) equaled 0.99. In Experiment 2, amplitude of the negative mucosal potential (NMP) was recorded from the septum. The resulting functions also increased with concentration sharply. Against a criterion amplitude of the NMP, thresholds measured in the first experiment (and predictions from the LFER) correlated 0.99. The NMP seems to offer an adequate objective measure of sensory irritation. The LFER, although effective predictively, could stand to have a parameter to anticipate that molecules beyond a certain size fail to trigger irritation. In the present case, a cut-off of chemesthetic potency occurred between butyl butyrate and hexyl butyrate for the group of subjects, with some variation of the boundary among individuals.

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Section: Slopes Of Psychometric Functions: An Interpretationmentioning

confidence: 99%

Chemesthesis from volatile organic compounds: Psychophysical and neural responses

Cain

Lee

Wise

et al. 2006

Physiology & Behavior

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“…Secondly, mixtures of odorants above odor threshold are believed to be hypoadditive, i.e. the odor intensity of the mixture is less than the sum of the single odorant intensities (cf., Berglund and Olsson, 1993;Berglund and Lindvall, 1992;ComettoMun iz and Cain, 1991;Cometto-Mun iz et al, 1997;Laing et al, 1994;Lawless, 1977). Thirdly, the intensity of the stronger odorant alone often offers a close description of the odor intensity of the mixture (Berglund and Lindvall, 1992;Cain et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Sensory and chemical characterization of VOC emissions from building products: impact of concentration and air velocity

Knudsen¹,

Kjær²,

Nielsen³

et al. 1999

Atmospheric Environment

101

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The emissions from five commonly used building products were studied in small-scale test chambers over a period of 50 days. The odor intensity was assessed by a sensory panel and the concentrations of selected volatile organic compounds (VOCs) of concern for the indoor air quality were measured. The building products were three floor coverings: PVC, floor varnish on beechwood parquet and nylon carpet on a latex foam backing; an acrylic sealant, and a waterborne wall paint on gypsum board. The impacts of the VOC concentration in the air and the air velocity over the building products on the odor intensity and on the emission rate of VOCs were studied. The emission from each building product was studied under two or three different area-specific ventilation rates, i.e. different ratios of ventilation rate of the test chamber and building product area in the test chamber. The air velocity over the building product samples was adjusted to different levels between 0.1 and 0.3 m s\. The origin of the emitted VOCs was assessed in order to distinguish between primary and secondary emissions. The results show that it is reasonable after an initial period of up to 14 days to consider the emission rate of VOCs of primary origin from most building products as being independent of the concentration and of the air velocity. However, if the building product surface is sensitive to oxidative degradation, increased air velocity may result in increased secondary emissions. The odor intensity of the emissions from the building products only decayed modestly over time. Consequently, it is recommended to use building products which have a low impact on the perceived air quality from the moment they are applied. The odor indices (i.e. concentration divided by odor threshold) of primary VOCs decayed markedly faster than the corresponding odor intensities. This indicates that the secondary emissions rather than the primary emissions, are likely to affect the perceived air quality in the long run. Some of the building products continued to affect the perceived air quality despite the concentrations of the selected VOCs resulted in odor indices less than 0.1. Therefore, odor indices less than 0.1 as an accept criterion cannot guarantee that a building product has no impact on the perceived air quality.

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“…Les odeurs peuvent induire des effets secondaires, comme des nausées, des troubles de la concentration, de l'appétit, des insomnies et surtout de l'inconfort. De nombreuses études ont montré que l'exposition à des atmosphères malodorantes, bien que non toxiques, affecte, chez un individu, l'évalua-tion des qualités de l'environnement, la sympathie envers les autres et renforce les sentiments d'anxiété, de fatigue et de tristesse (Rotton J. et al, 1979 ;Shusterman, 1992 ;Laing DG. et al, 1994 ;Schiffman, 1998 ;Le Guérer, 1998).…”

Section: Quels Sont Les Effets Sur Les Riverains ?unclassified

De l’odeur à l’impact sur le territoire

Delva¹,

Cobut²,

Fanlo³

2017

Pollution Atmosphérique

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RésuméL'odeur et les gênes et nuisances qui en découlent sont de plus en plus d'actualité autour de sites industriels en Europe. Les industriels sont souvent démunis face aux plaintes du voisinage ou aux impositions contenues dans leurs arrêtés préfectoraux. Les actions prises pour mesurer la pollution ou pour corriger la situation sont souvent décalées des besoins réels. L'objectif de cet article est, premièrement, de décrire précisément les différentes dimensions de cette problématique et, deuxièmement, de présenter les méthodologies et techniques de mesure adaptées pour caractériser ces dimensions, depuis la perception jusqu'au potentiel de nuisance et aux plaintes. Mots-clésodeur, gêne olfactive, impact olfactif, nuisances odorantes, olfactométrie, plaintes AbstractOdors, olfactory discomfort and nuisances are increasingly topical around industrial sites in Europe. Site operators are often deprived in front of the complaints of the neighborhood or the impositions in their prefectural decrees. The actions taken to measure the pollution or correct the situation are often far from actual needs. The objective of this article is first to describe the different dimensions of this problem, then to present the methodologies and measurement techniques adapted to characterize these dimensions, from perception to complaints.

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Perceptual characteristics of binary, trinary, and quaternary odor mixtures consisting of unpleasant constituents

Cited by 59 publications

References 7 publications

Chemesthesis from volatile organic compounds: Psychophysical and neural responses

Chemesthesis from volatile organic compounds: Psychophysical and neural responses

Sensory and chemical characterization of VOC emissions from building products: impact of concentration and air velocity

De l’odeur à l’impact sur le territoire

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