Essay about Sensory Adaptation

1451 Words Apr 28th, 2016 6 Pages
Introduction:
Adaptation in sensory evaluation of food refers to the slow drop of sensation (in constant magnitude) after the stimulus has been fully switched on (Lawless & Heyman, 1993). They also added that after a certain time this sensation can completely disappear or in some instances the taste persists that shows a degree of taste adaptation. This idea usually occurs when the perceived taste intensity of one product reduces the other different product. For example, water can taste sour or bitter after a salt adaptation. On the other hand, taste interaction masks the interaction between mixtures of different tastes (Lawless & Heyman, 1993). A solution of sucrose (sweet) and quinine (bitter) will taste less sweet than a pure
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This experiment is divided into four sections and it begins with evaluating the sour intensities using six coded samples in the first two sections. However, the sixth sample of second section is sweet. Then, the 3rd section is composed of two experiments which test for sweetness intensities. Finally, the 5th experiment has three phases (sub-sections). The first is testing the taste intensity by holding your nose. Secondly is identifying while releasing the nose- hold and finally, is to scale the taste intensity by sniffing the unknown liquid sample.

Aim: To study the physiological changes in taste adaption and mixture interaction and how it affects the tasters’ perception.
Materials:
Experiment 1 (sample codes): 0.11% Citric acid monohydrate | Experiment 2(sample codes): 0.11% Citric acid monohydrate | Experiment 3 (sample codes): 5% Sucrose + 0.05% Citric acid | Experiment 5 (sample code): 10% Vanilla solution | 496 | 584 | 565 | 932 | 382 | 272 | Experiment 4 (sample codes): 5% sucrose + 0.05% citric acid | | 129 | 391 | 401 | | 756 | 706 | | | 901 | 687 | | | 243 | 423* | | |
423* is a solution of 5% Sucrose + 0.05% Citric acid.

Method:
Participants performed four experiments. Firstly, they evaluated sourness intensity in five samples, holding each solution in their mouths for five seconds. They spat each into a plastic container and washed their mouths with water. Then, for the sixth solution in the first experiment, participants

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