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NUSC 3233 Lecture 3 Test With Complete Solution
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NUSC 3233 Lecture 3 Test WithComplete Solution
rheology - Answer Objective Analysis: What can be measured?
- *Moisture: important for shelf life
- texture: crispy, soft, crunchy
- ___: ketchup stickness, viscous to stay on fry
;viscosity, how thick /thin liquid might be
- color: use a computer to scan code to LAB value
- nutrient analysis: food label
- pH
- Sugar, salt and flavor
highly
greater - Answer Objective Analysis: Introduction
Must utilize all kinds of tools to obtain data
Sample size can be easily controlled
Obtain ___ reliable data
Results are of ___ significance
Physical and chemical methods
Supplement the data obtained by subjective methods
LAB value - Answer ___ is the way food industry measures color in number to find
certain color
accurate - Answer Objective Analysis: Guidelines
1. Conduct all measurements with equipment if available
2. Obtain necessary testing devices
3. Take good care of equipment
, 4. Define the samples to be tested
5. Establish operating conditions
6. Avoid acquisition of false data (outliers)
7. Be ___ and precise
Accuracy - Answer __: closeness of a measured value to a standard or known value
Precision - Answer __: closeness of two or more measurements
not - Answer some thing can be accurate and __ precise and vis versa, but need to be
both
use hand - Answer How to measure volume of an irregular shaped sample?
Seed Displacement Method - Answer How can the volume of a food product be
measured (especially baked goods)?
without - Answer in seed displacement method Volume of seeds (rapeseeds, canola) is
determined with and __ sample
calibration - Answer Seed Displacement Method
oRepeated __
oOperator dependence
oLoss of seeds due to spillage
oAdherence of seeds to the product due to static electricity
oSeed clumping due to moisture absorption
oThe potential crushing of freshly baked or soft products
oThe inability to test small products
oManual recording of results with no digital record
Tracing - Answer when want to measure volume slice of bread
__ a detailed outline of food Slice taken from the same place on each sample.
Use pencil, pen or ink blot
Measure the area by use of a planimeter
topography - Answer 3D laser ___-based non-contact measurement
oSticky, crispy, soft products can be measured without touching the product
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