Masking of Several Olfactory Notes by Infra-threshold Concentrations of 2,4,6-Trichloroanisole

IF 1 4区医学 Q4 Neuroscience

Chemosensory Perception Pub Date : 2017-06-17 DOI:10.1007/s12078-017-9227-5

S. Tempere, M. H. Schaaper, E. Cuzange, G. de Revel, G. Sicard

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引用次数: 14

Abstract

Among wine defects, 2,4,6-trichloroanisole has a specific impact on wine perception. In addition to giving to the wine an unpleasant odor, 2,4,6-trichloroanisole has a masking effect on notes. In this study, the specificity and efficacy of the masking effect of 2,4,6-trichloroanisole was tested at infra- and supra-threshold concentrations. A simplified model of a binary mixture was also studied for in-depth analysis of this phenomenon.

Techniques used included sensory analysis (odor profiling), psychophysical tests (threshold measurement and triangle test), chemical analyses (GC-MS), and a mono/dichorhinic stimulation paradigm, to test the hypothesis of peripheral interaction.

The results revealed that TCA had a masking effect on a range of aromatic notes, even at infra-threshold concentrations. However, they also showed counteraction of odorant specificity by 2,4,6-trichloroanisole. The origin of this masking effect was also discussed. The results suggested that this interaction can be assumed to take place at receptor level.

This study provided experimental confirmation of the widespread idea that constituents in non-perceptible concentrations influence the perceived quality of mixtures of odorous compounds.

Moreover, this type of olfactory model may improve our understanding of combinatorial olfactory encoding at the peripheral level.

Abstract Image

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2,4,6-三氯苯甲醚阈下浓度对几种嗅觉的掩盖作用

在葡萄酒缺陷中，2,4,6-三氯苯甲醚对葡萄酒感知有特定的影响。2,4,6-三氯苯甲醚除了给葡萄酒带来难闻的气味外，还对音符有掩蔽作用。在本研究中，测试了2,4,6-三氯苯甲醚在阈值以下和阈值以上浓度下掩蔽效应的特异性和有效性。为了深入分析这一现象，还研究了二元混合物的简化模型。使用的技术包括感官分析(气味分析)、心理物理测试(阈值测量和三角形测试)、化学分析(气相色谱-质谱)和单/双双刺激范式，以检验外周相互作用的假设。结果表明，即使在阈值以下的浓度下，TCA对一系列芳香气味也有掩蔽作用。然而，它们也表现出2,4,6-三氯甲醚对气味特异性的拮抗作用。本文还讨论了这种掩蔽效应的来源。结果表明，这种相互作用可以假设发生在受体水平。这项研究提供了实验证实了一个普遍的想法，即成分在不可察觉的浓度影响感知质量的气味化合物的混合物。此外，这种类型的嗅觉模型可以在外围水平上提高我们对组合嗅觉编码的理解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemosensory Perception 农林科学-神经科学

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： Coverage in Chemosensory Perception includes animal work with implications for human phenomena and explores the following areas: Identification of chemicals producing sensory response; Identification of sensory response associated with chemicals; Human in vivo response to chemical stimuli; Human in vitro response to chemical stimuli; Neuroimaging of chemosensory function; Neurological processing of chemoreception; Chemoreception mechanisms; Psychophysics of chemoperception; Trigeminal function; Multisensory perception; Contextual effect on chemoperception; Behavioral response to chemical stimuli; Physiological factors affecting and contributing to chemoperception; Flavor and hedonics; Memory and chemoperception.