02-Sensory-1

02-Sensory-1 - Sensory Science & The Perception of Food

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6 Sensory Science What is it? Sensory Quality Factors • Appearance • Flavor • Texture Sensory Attributes of Foods • Appearance • Flavor – Aroma/Odor/Smell – Gustation/Taste – Astringency – Trigeminal senses (Pain/ Irritation/ Temperature) • Texture Ancient Chinese Food Science Ancient Chinese theory of five phases In Ancient China the Taoist added to the concept of Yin and Yang the theory known as the 5 Elements Earth, wood, fire, metal, and water 5 colors, 5 tastes, 5 smells, etc…
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7 Vision: Appearance. Surface structure, Color, shape
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8 The color world is a 3 dimensional space, Like an xyz space in math Munsell System http://en.wikipedia.org/wiki/Munsell_color_system
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9 Chemical senses Taste, aromas, and other chemical signals can make the mouth water, evoke vivid memories, and perhaps even signal stress or fertility. How does the brain sort it all out?
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10 Chemical Senses • Taste • Astringency (tactile sensation) • Pungency (Pain/ Irritation) • Smell NOTE: In parallel with the main olfactory system used for odor sensing, evolution has also spawned a separate “accessory olfactory system” in some animals for detecting “pheromones”—chemical signals used by individuals of the same species to mark territory, warn of danger, identify close relations, and induce mating. Flavor : the combined sensation perceived via the chemical senses (taste, smell, trigeminal nerve) from a product in the mouth Smell + Taste + others Flavor Taste Taste Taste : taste refers only to perceptions resulting from the water-soluble chemicals in contact with gustatory receptors in the mouth and throat. Ancient Chinese theory: 1. sweet, 2. sour, 3. bitter, 4. salt 5. piquant (or hot as in pepper). Taste • In modern science, it has been commonly stated that there were four primary or basic tastes : • Sweet • Sour • Salty • Bitter • Umami has been added as a 5 th primary. Sometimes umami is called “ Savory
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Genetics Sweetness —sugar (PPE Saltiness —NaCl Good Sourness —acid [H+] Warning Bitterness —toxins Warning Umami —amino acids ? Taste anatomy Taste bud : gustatory receptor cells are modified epithelium cells that are bundled into groups and contained in complex sensory organs called taste buds. Taste papillae
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02-Sensory-1 - Sensory Science & The Perception of Food

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