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Interactions of astringent substances

H T Lawless1, C J Corrigan, C B Lee

  • 1Food Science Department, N.Y. State College of Agriculture and Life Sciences, Cornell University, Ithaca 14850.

Chemical Senses
|April 1, 1994
PubMed
Summary

Astringent mixtures can suppress sensations, especially at higher concentrations. Sensory interactions between astringent compounds like alum, gallic acid, and citric acid depend on the specific substances and their concentrations.

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Area of Science:

  • Food science
  • Sensory science
  • Oral physiology

Background:

  • Astringency is a complex oral sensation caused by various compounds, including tannins and acids.
  • Understanding how different astringent compounds interact is crucial for food and beverage formulation.
  • Previous research has explored astringency but interactions between specific compounds require further investigation.

Purpose of the Study:

  • To investigate the sensory interactions of two-component mixtures of astringent materials.
  • To determine how concentration affects the perceived intensity of astringent attributes over time.
  • To identify patterns of mixture suppression or additivity among specific astringent compounds.

Main Methods:

  • Evaluated two-component mixtures of alum, gallic acid, catechin, and citric acid.
  • Rated perceived intensity of astringency, drying, roughing, and puckery/drawing sensations over time.
  • Varied concentrations of astringent components to observe effects on sensory perception.

Main Results:

  • Mixtures of alum and gallic acid exhibited mixture suppression, with lower perceived intensity than individual components at moderate to strong concentrations.
  • Citric acid mixtures showed a similar, though less pronounced, pattern of suppression.
  • Catechin and gallic acid mixtures demonstrated additive sensory effects.
  • Suppression effects were concentration-dependent, being less evident at lower astringency levels.

Conclusions:

  • Sensory interactions between astringent materials are compound-specific and concentration-dependent.
  • Mixture suppression is a significant phenomenon in astringency perception, particularly for certain compound combinations.
  • The findings provide insights into the complex interplay of astringent compounds in food and beverage systems.

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