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Taste Buds and Receptors01:20

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Gustation, or the sense of taste, is intrinsically linked to the anatomical structures located on the tongue. This organ's surface, along with the entirety of the oral cavity, is adorned with stratified squamous epithelium. Evident on the tongue are elevated structures known as papillae (singular = papilla), which house the mechanisms for the transduction of gustatory stimuli. Four distinct types of papillae exist, each identified by their unique morphological attributes: the circumvallate,...
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Related Experiment Video

Updated: Jun 1, 2025

Psychophysical Tracking Method to Assess Taste Detection Thresholds in Children, Adolescents, and Adults: The Taste Detection Threshold TDT Test
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Psychophysical Tracking Method to Assess Taste Detection Thresholds in Children, Adolescents, and Adults: The Taste Detection Threshold TDT Test

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Impedimetric multi-sensor system with gold and silver nanoparticles applied for basic taste assessment compared with

Dhanus Raj Kanaga Raj1, Maria Helena Gonçalves2, Alessandra Cazelatto de Medeiros1

  • 1Department of Food Engineering and Technology, School of Food Engineering, State University of Campinas, Campinas, SP, Brazil.

Food Chemistry
|January 17, 2025
PubMed
Summary

An impedimetric electronic tongue effectively classifies basic tastes, showing high sensitivity for non-electrolytes like caffeine and sucrose. This technology offers versatile applications in food and pharmaceutical industries.

Keywords:
ChemometricsElectronic tongueGold nanoparticlesSensorsSilver nanoparticlesThreshold determination

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Area of Science:

  • Food Science
  • Sensory Science
  • Analytical Chemistry

Background:

  • Threshold determination is crucial for product development and quality control in sensory studies.
  • Electronic tongues offer a potential alternative or supplement to traditional sensory evaluation methods.
  • Understanding taste compound discrimination is vital for product formulation and consumer acceptance.

Purpose of the Study:

  • To evaluate the efficacy of an impedimetric electronic tongue in discriminating basic tastes.
  • To compare the electronic tongue's performance with human sensory evaluation.
  • To investigate the influence of nanoparticles on electrode sensitivity for taste analysis.

Main Methods:

  • Consumer studies were conducted using the difference from-control (DFC) test with 60 participants.
  • Impedimetric electronic tongue measurements were performed on basic taste compounds at varying concentrations.
  • Principal Component Analysis (PCA) was used to analyze electrode sensitivity and taste classification.

Main Results:

  • The electronic tongue achieved high prediction sensitivity (99-100%) for non-electrolytic compounds like caffeine, tannic acid, and sucrose.
  • Sensitivity was lower for electrolytic compounds (sodium chloride, monosodium glutamate, citric acid), indicating a need for further research.
  • Nanoparticle incorporation enhanced electrode sensitivity, improving the electronic tongue's performance.

Conclusions:

  • Impedimetric electronic tongues demonstrate significant potential for classifying basic tastes, particularly non-electrolytes.
  • The technology shows promise for cost-effective applications in the food and pharmaceutical sectors.
  • Further investigation is required to optimize performance for electrolytic taste compounds.