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. 2011 Sep 14;106(6):3145–3156. doi: 10.1152/jn.00580.2011

Table 1.

Stimuli, concentrations, and abbreviations

Stimulus Class Concentration Abbreviation
Group I
    Sucrose Sweet 0.5 M S
    NaCl Salt 0.1 M N
    HCl Acidic 0.01 M H
    Quinine-HCl Bitter 0.01 M Q
Group II
    Ethanol Alcohol 3% e1
    Ethanol Alcohol 5% e2
    Ethanol Alcohol 10% e3
    Ethanol Alcohol 15% e4
    Ethanol Alcohol 25% e5
    Ethanol Alcohol 40% e6
Group III
    Sucrose Sweet 0.01 M s1
    Sucrose Sweet 0.03 M s2
    Sucrose Sweet 0.1 M s3
    Sucrose Sweet 0.3 M s4
    Sucrose Sweet 1 M s5
Group IV
    d-Fructose Sweet 1 M f
    d-Glucose Sweet 1 M g
    Na+-saccharin Artificial sweet 0.005 M sa
    Sucrose + quinine-HCl Mixture 0.1 + 0.0001 M sq
    Na+-nitrate Salt 0.1 M nn
    Citric acid Acidic 0.01 M c
    Potassium chloride Salt 0.2 M k
    Magnesium chloride Salt 0.01 M m
    Nicotine Bitter 0.01 M ni
    Quinine-HCl Bitter, weak 0.0001 M q