02-Sensory

02-Sensory - Perception of Food 1 Sensory Science What is...

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1 Perception of Food
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2 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
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3 Vision: Appearance. Surface structure, Color, shape
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4 Chemical Senses • Smell • Taste • Astringency (tactile sensation) • Pungency (Pain/ Irritation) Flavor : the combined sensation perceived via the chemical senses (taste, smell, trigeminal nerve) from a product in the mouth Smell + Taste + others Flavor Taste Olfaction (smell) Aroma (odor): the olfactory sensation perceived when volatile chemicals are sniffed through the nose As many as ~10,000 different odors can be detected
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5 Human olfactory system Olfactory epithelium : small patch of tissue (5cm 2 ) located at the top of the nasal cavity and contains the olfactory receptor cells Olfactory cilia : long hair-like extensions of the membrane from receptor cells that make contact with the odorants Olfactory bulb : receptor cells axons of the olfactory receptors are bundled together into groups and extend centrally to form the olfactory nerve Taste • Taste : taste refers only to perceptions resulting from the water-soluble chemicals in contact with gustatory receptors in the mouth and throat. Taste • It has been commonly stated that there were four primary or basic tastes : • Sweet • Sour • Salty • Bitter • Umami ( ࢫຯ* has been added as a 5 th primary. Sometimes umami is called “ Savory Genetics Sweetness —sugar (PPE Saltiness —NaCl Good Sourness —acid [H+] Warning Bitterness —toxin Warning Umami —amino acids ?
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6 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 :specialized structures that contain clusters of taste buds Chemical senses and Aging • Taste: minor decline in sensitivity • Olfaction: significant decrease in sensitivity (receptor cell turning over rate is much lower) Trigeminal senses • Includes pain, touch-pressure, warm-cold, • Irritation called pungency or spicy (Chemical effect)
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02-Sensory - Perception of Food 1 Sensory Science What is...

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