Objective Evaluation Flashcards
It involves instrumentation and use of physical and chemical techniques to evaluate food quality.
Objective evaluation of foods
Fill in the blanks. The objective test must measure a/an _____ of the food that has a major effect on ____.
attribute; quality
Modified true or false. The objective test results should correlate with sensory testing of a different food product to ensure that the test is a reliable index of the food’s quality.
False; different -> similar
True or False. Objective tests must be repeatable.
True.
Modified true or false. One characteristic of an objective tests is its entire inclusion of the investigators’ attitudes.
False. inclusion –> exclusion
Modified true or false. Objective evaluation is a highly reliable data, convenient, and subject to human factors.
False. Non-subject.
Fill in the blank. Objective test offers only a ____ measurement of the true food’s true quality.
proxy
What is the basis of evaluation for both sensory evaluation and objective evaluation?
The 5 senses
Modified true or false. The color fan uses hue, value and chroma to specify colors.
False. Munsell color system (color fan)
Give 2 kinds of color fan used in the lab.
Pantone and Benjamin Moore
Modified true or false. In identifying colors using a hunter lab, b represents the color-opponent dimensions of redness-greeness of a product.
False. b represents blueness-yellowness (b+ yellow, b- blue)
a+ red, a- green, L=100 bright, L=0 dark
Give the other three simple instruments mentioned in the discussion that can be used to describe appearance.
1.) photography and microphotography
2.) ink imprints
3.) photocopying
Using volume to assess the appearance of a food sample can be done by ___ and ____.
taking dimensions; displacement methods
What instrument is used to substitute the nose in assessing aroma?
E-nose
What does e-nose stand for?
Electric
Natural
Olfactory
Sensory
Emulator
Fill in the blank. E-nose can be used to detect ___-odors and __ contaminants.
off-odors and microbial contaminants
In the objective evaluation of taste, what instrument is used to measure sweetness?
Refractometer
What instrument is used to measure sourness?
pH meter and titration
True or false. Salinimeter is the instrument used to measure the saltiness of a food sample.
False. Salinometer
What compounds does the e-nose absorb in identifying aroma?
Volatile compounds
What is the instrument used in detecting the 5 basic tastes?
Electric tongue or e-tongue
It refers to the quality of food that can be felt with the fingers, tongue, palate or teeth.
Texture
It is defined as the science of deformation and flow of matter. It other words, it is the reaction of food in the application of pressure.
Rheology
Fill in the blank. Penetrometer is a test for ____.
firmness
Fill in the blank. The stable micro system is a ___ analyzer.
texture
Fill in the blanks. Line spread test is a test for ___ and ___.
consistency and viscosity
It is an instrument that is based in the rotational resistance of capillary action.
Viscometer
What do you call the instrument that measures the acoustic energy release during a physical test?
Acoustic envelope detector
It determines the smoothness or roughness of the sound.
Acoustic Tribology
It is an attempt to correlate instrumental measurements with sensory descriptions.
Texture profile analysis
