Winner of Dell PDA for week 4:
Nur Hartina
(
I/C No. S8038521H
)
Question: What is the taste of orange juice after brushing your teeth?
view answer
On Week 4 Science Spark explored your sense of taste with the following question:
What does orange juice taste like if you drink it after brushing your teeth with toothpaste?
The correct answer is C & D or C/D. It will taste sour and bitter instead of its normal sweetness.
Your tongue is covered with millions of taste buds and they bind to different chemicals in food and give you the sensation of taste. We have five primary taste sensations, sweet, sour, salty, bitter and umami (taste of monosodium glutamate used in Chinese cooking).
Orange juice apart from tasting sweet, also contain a certain amount of sourness and bitterness due to the citric acid in the juice. Most toothpaste contain a chemical called s odium lauryl sulfate. This chemical can suppress the sweet taste in the orange juice and enhance the bitterness and sourness, making orange juice taste really bad after you have brushed your teeth.
References:
http://www.cln.org/themes/taste.html
http://www.publish.csiro.au/helix/cf/issues/TH49B1.cfm
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