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10 Cards in this Set
- Front
- Back
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What information can you get from time-intensity scaling?
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Temporal information about perceived sensations. If multiple attributes are tracked, the overall profile of a complex food may show differences between products.
Imax, Time(to max, total), rate & shape to max, rate & shape to 1/2 max, etc.. |
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Name some products for which time intensity measurements are especially useful.
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Sensations that linger or have carry-over like astringency or high potency sweeteners, chewing gum, hand lotions - anything that has a distinct time profile
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What happens to the intensity of astringency when wine is repeatedly sipped?
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It goes up! TI methods are useful to see how sensory ratings change over repeated exposures
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Why has time-intensity methodology been so often applied to sweeteners?
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Because many intensive and non-carb sweeteners have a sensation time course different from that of sucrose; this characteristic is objectionable and tends to impact acceptance
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Sketch two T-I curves – one for the sweetness of sucrose and one for the sweetness of a high potency sweetener that lingers in the mouth.
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The T-I curve of the high pot. sweetener has a long tail - typical peak shape
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Sketch a T-I curve for the melting of ice cream in the mouth. Label the axes.
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No PEAK! Just a unidirectional function going either up (rating melting) or going down (rating Not Melted)
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How does the process of eating a food affect the volatilization of aroma compounds?
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Flavor volatilization is a function of how the food is mixed w/saliva, the pH change that occurs, enzymatic processes, warming, mechanical destruction of food breakdown, etc.
Anything that influences any one of these many factors can affect how flavor is volatilized. |
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Why might retronasally perceived odors differ from the same odor perceived orthonasally?
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Because flavor balance, interactions w/other tastes, and the time properties of release (ie volatilization) may be different
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What is meant by an individual person’s T-I signature?
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Individual judges show different T-I patterns which are unique and reproducible within themselves
Cause is unknown - physiological difference or scale usage |
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Which T-I parameters are almost always highly correlated?
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Curve size parameters are almost always highly correlated
ie peak height, AUC, slope all related |
