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Citation
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HERO ID
86513
Reference Type
Journal Article
Title
An algorithm for nasal pungency thresholds in man
Author(s)
Abraham, MH; Kumarsingh, R; Cometto-Muniz, JE; Cain, WS
Year
1998
Is Peer Reviewed?
Yes
Journal
Archives of Toxicology
ISSN:
0340-5761
EISSN:
1432-0738
Report Number
BIOSIS/98/17569
Volume
72
Issue
4
Page Numbers
227-232
Language
English
Abstract
#Nasal pungency thresholds (NPT) in man have been determined by Cometto-Muniz and Cain for 44 varied compounds, including esters, aldehydes, ketones, alcohols, carboxylic acids, aromatic hydrocarbons and pyridine. With the exclusion of acetic acid, 43 of these NPT values are well correlated through the general linear free energy equation of Abraham, leading to the algorithm, log(1/NPT) = -8.519 + 2.154 pi(2)H + 3.522 sigma alpha(2)H + 1.397 sigma beta(2)H + 0.860 logL16. N = 43, r2 = 0.955, SD = 0.27, F = 201 (i) where the independent variables are solute descriptors: pi(2)H is the dipolarity/polarizability, sigma alpha(2)H and sigma beta(2)H are the overall or effective hydrogen-bond acidity and basicity, and L16 is the solute Ostwald solubility coefficient on hexadecane at 25 degrees C. Surprisingly, the aliphatic aldehydes and carboxylic acids fit the correlation and with respect to nasal pungency thresholds in man for brief (1-3 s) presentations must be regarded as 'nonreactive' compounds. It is suggested mere transport of the compound from the air stream to the receptor area largely determines the potency to produce pungency. Various chemical properties of the receptor area are deduced from the coefficients in Eq. i.
Keywords
Biochemical Studies-General
;
Sense Organs
;
Toxicology-General
;
Hominidae
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