Variation in odor thresholds for l-carvone and cineole and correlations with suprathreshold intensity ratings.
Variation in odor thresholds for l-carvone and cineole and correlations with suprathreshold intensity ratings.
复制标题
左旋香芹酮和桉树脑的气味阈值的变化以及与阈上强度评级的相关性。
DOI：
10.1093/chemse/20.1.9
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发表时间：
1995
期刊：
影响因子：
3.5
通讯作者：
Johnston,M
中科院分区：
文献类型：
--
作者：
Lawless,HT;Thomas,CJ;Johnston,M
据报道，香芹酮和桉叶素这两种在食物风味感知中起重要作用的化合物出现了特殊的嗅觉障碍。通过一式四份的递增强迫选择测试，对50多名个体进行检测阈值评估。阈值存在很大的个体差异。在同一次会议中，阈值相关性在+0.8到+0.9的范围内，显示出良好的短期可靠性。在减去空白样本的假阳性评级后，与阈值以上评级的相关性适中(r=-0.5)。然而，一项桉树脑混合实验未能显示出先前根据阈值测量被归类为高或低敏感度的亚组之间的任何差异。在几个月后对选定的组进行重新测试显示，阈值在个体内存在相当大的差异，特别是Forl-carvone。这些结果对这两种化合物阈值分类的稳定性和实用性提出了质疑。
Specific anosmias have been reported forl-carvone and cineole, two compounds of importance in food flavor perception. Detection thresholds were assessed in groups of 50+ individuals by ascending forced-choice tests conducted in quadruplicate. Wide individual differences in thresholds were observed. Within the same session, threshold correlations were in the range of +0.8 to +0.9, showing good short-term reliability. Correlations with suprathreshold ratings were moderate (in the range ofr= –0.5) after subtraction of false positive ratings for blank samples. However, a cineole mixture experiment failed to show any differences between subgroups that were previously classified as high or low sensitivity on the basis of threshold measurements. Re-testing selected groups after a period of months showed considerable within-individual variation in the thresholds, especially forl-carvone. These results call into question the stability and utility of threshold classification for these two compounds.