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Some taste molecules and their solution properties.

S A Parke1, G G Birch, R Dijk

  • 1Department of Food Science & Technology, University of Reading, Whiteknights, UK.

Chemical Senses
|July 10, 1999
PubMed
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This study investigated the solution properties of sweet, salty, sour, and bitter substances. Hydration and compressibility measurements reveal how different taste molecules interact with water structure.

Area of Science:

  • Physical Chemistry
  • Solution Chemistry
  • Taste Perception

Background:

  • Understanding molecular interactions in solution is crucial for various scientific fields.
  • Sapid substances, responsible for taste, interact uniquely with aqueous environments.
  • Investigating the physical-chemical properties of taste molecules provides insights into their behavior.

Purpose of the Study:

  • To investigate the solution properties of molecules across all four basic taste modalities: sweet, salty, sour, and bitter.
  • To examine multisapophoric molecules exhibiting multiple tastes.
  • To correlate solution properties like hydration and compressibility with taste quality.

Main Methods:

  • Measurement of density and sound velocity of aqueous solutions of sapid substances.

Related Experiment Videos

  • Calculation of apparent molar volumes, apparent specific volumes (ASV), and isentropic apparent specific compressibilities.
  • Determination of compressibility hydration numbers.

    • Main Results:

    • Apparent specific volumes (ASV) varied across taste modalities, indicating different hydration levels.
    • Isentropic apparent specific compressibilities showed distinct ranges for each taste group.
    • Compressibility hydration numbers quantified the disturbance of water molecules by solutes.
    • A correlation was observed between isentropic apparent molar compressibility and taste quality.

    Conclusions:

    • Solution properties, particularly ASV and compressibility, are indicative of molecular interactions with water structure.
    • Taste quality can be related to specific physical-chemical parameters in aqueous solutions.
    • The study provides a framework for understanding taste perception at a molecular level through physical chemistry.