Sensory & consumer science Flashcards

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1
Q

What are the sensory characteristics a consumer considers

A

sight, taste, touch, hearing and smell

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2
Q

What is sight concerned with

A

appearance of food where consumers judge the shape, size & colour of the food to decide its quality

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3
Q

What is the colour of the food measured by

A

colourimeters & spectrophotometers

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4
Q

What affects the perception of colour

A

lighting

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5
Q

What are somatosensations

A

Sense of touch and are neurons underneath the skin that can sense tactile, thermal and irritation stimuli through various receptors

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6
Q

What is Chemesthesis

A

Chemesthesis are sensations which chemical compounds activate the receptors of other senses

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7
Q

What are sensations involved in Chemesthesis

A

Those involved are pain, touch & thermal perception in the eye, nose, mouth & throat

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8
Q

What are some examples of Chemesthesis sensations

A

Capsaicin & menthol work by stimulating thermoreceptors for heat & coldness
Other sensations include fizziness of carbon dioxide, numbing sensation of mala & fiery sensation of ethanol

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9
Q

What are the 5 taste

A

sweet, sour, bitter, salty & umami

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10
Q

Where can taste be found

A

tongue, cheeks & soft palate

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11
Q

what are Olfactory receptors used for

A

olfactory receptors in the olfactory epithelium is used to detect compounds

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12
Q

What is Orthonasal sensations

A

Orthonasal refers to perception of aromas coming in from the nose before chewing it

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13
Q

What is Retronasal sensations

A

Retronasal refers to perception of aromas through the nose when chewing & swallowing it

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14
Q

What is flavour

A

Flavour is the perception resulting from stimulating a combination of taste buds, olfactory organs & chemesthetic receptors within the oral cavity
Flavour can also refer to a mixture of volatile compounds that re concocted to impart the desired sensory characteristic of the food

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15
Q

What can Gas chromatograph do

A

Gas chromatograph can identify & quantify odour molecules present in food

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16
Q

Can sense of flavours be affected by other flavours

A

yes

17
Q

Do all affective and affirmative test need to be codded

A

Yes

18
Q

Do panelist for an affective test need to be trained

A

Panellist for affective sensory evaluation should do not need to be trained but should be from that consumer group

19
Q

What are the affective test

A

acceptance test and preference test

20
Q

What are analytical test

A

difference test, descriptive test, threshold test, time intensity

21
Q

What are difference test

A

Difference test are designed to determine the differences between reference sample & test sample

22
Q

What occurs in triangle test

A

In triangle test, panellist are presented with 3 unknown samples, 2 of which are identical

23
Q

What occurs in a tetrad test

A

In tetrad test, 4 samples are presented simultaneously, 2 from 1 group & 2 from the other.

24
Q

What is difference test used for

A

Difference test are used to develop product to match competitor & can be carried out as quality control test to ensure products produced on different days have a consistent sensory profile

25
Q

What is a descriptive test

A

A descriptive test is used as a sensory descriptive analysis

26
Q

Is screening of panelist needed

A

screening of panelist are needed as they need to be sensitive to attributes of interest

27
Q

What is the list of descriptors used called

A

lexicon

28
Q

What is usually the number of people required on a descriptive test

A

about 5

29
Q

What is the threshold test

A

The threshold test determines the minimum concentration of a compound that must be present in for humans to detect or recognise the compound

30
Q

What is detection threshold

A

Detection threshold is the concentration of a substance in which a panel can consistently detect a difference from more dilute samples and is usually lower than recognition threshold

31
Q

What is Recognition threshold

A

Recognition threshold of a substance is the level at which the panel can identify the substance

32
Q

What are Threshold test performed on

A

Threshold test are most commonly performed on odorous compounds

33
Q

What are time intensity test

A

Time-intensity test measure how sensory attributes changes with time

34
Q

What are affective test used for

A

An affective test is used to see if differences are identifiable or if consumers prefer the newer product

35
Q

What are preference test

A

Preference test involves presenting consumers with at least 2 samples & asking which they prefer

36
Q

What are acceptance test

A

In acceptance test, consumers are asked to rank their liking of the product on a scale such as a 9-point hedonic scale

37
Q

Are acceptance test usually on 1 product

A

yes

38
Q

What is focus group test

A

Focus group is a test to gain insights into how consumers usually use the product and their general preferences