Chapter 1 Food Experimental Process
- Define purpose -
How to define purpose?
By observation to find out the problem and examine the current dimensions of food studies/ the current food trends.
For example,
PROBLEM : Lack of nutritional pasta in the market
TREND: Healthy food
SUGGESTION: Substitute brown rice flour into pasta to increase nutritional value and match the current trend.
PURPOSE = OBJECTIVE
OBJECTIVE: To determine the effects of brown rice flour on a modified pasta
- Designing experiment -
**Involves identify variables, methods(procedures) for experiment and the evaluation methods.**
What are variables?
Dependent variable = The variable change depends on the independent variable ( Responding variable)
Independent variable = The variable that you intentionally change (Controlling variable)
For example: The amount of sugar (independent variable) affects the sweetness of food (dependent variable).
Methods = the planning for sample preparation & the planning for principle of experimental design.
Planning for sample preparation?
1st, must have an ideal control/standard product.
Next, identify the steps/procedures that need to prepare the product
**ensure repeatable for experimental sample & data collecting following the stated methods**
Conducting Experiment**Involves identify variables, methods(procedures) for experiment and the evaluation methods.**
What are variables?
Dependent variable = The variable change depends on the independent variable ( Responding variable)
Independent variable = The variable that you intentionally change (Controlling variable)
For example: The amount of sugar (independent variable) affects the sweetness of food (dependent variable).
Methods = the planning for sample preparation & the planning for principle of experimental design.
Planning for sample preparation?
1st, must have an ideal control/standard product.
Next, identify the steps/procedures that need to prepare the product
**ensure repeatable for experimental sample & data collecting following the stated methods**
Planning for principle of experimental design?
1. Randomization - A random process of assigning treatments to the experimental units
2. Replication - Repetition of basic experiment
3. Blocking/local control - Experimental units are collected or compared among conditions of experiment within each box
Evaluation methods and devices
- identify important objective measurements
- identify appropriate technique/methods used in food analyses
- determine quantities of sample needed
- determine the timing & temperature of samples for testing
- identify the appropriate equipment for objective and subjective testes.
- ensure all pertinent characteristics are test properly. = Validation
- design and develop suitable scorecard for sensory evaluation.
Evaluation methods and devices
- identify important objective measurements
- identify appropriate technique/methods used in food analyses
- determine quantities of sample needed
- determine the timing & temperature of samples for testing
- identify the appropriate equipment for objective and subjective testes.
- ensure all pertinent characteristics are test properly. = Validation
- design and develop suitable scorecard for sensory evaluation.
1. Preparation - Preparation before start the experiment !
Prepare experiment flow chart by reading the procedures
Answer pre-Lab questions - Do some research about the experiment
Take note on the safety precautions in lab
2. Data table
Prepare and construct a table to record the readings/result
Take note on the descriptive result
3. During experiment
Preliminary run - first run to use as guild-line which cannot be used as actual result (example: HPLC)
Observation - very important ! take photos if problems occur, interesting occurrences, unexpected lookout and record the scenario.
Interpreting Data
*Not reporting data*
identify the accuracy and precision
analyse the data based on the statistics
Reporting Result
1. Report writing - Report the data obtained; Justification; give support by references and examples. Avoid Plagiarism !
2. Data presentation - less word; chart display the frequencies, trends, distribution or association.
3. Conclusion - summary of the result and answer the hypothesis which is related to the result. [Keep it simple!]
Observation - very important ! take photos if problems occur, interesting occurrences, unexpected lookout and record the scenario.
Interpreting Data
*Not reporting data*
identify the accuracy and precision
analyse the data based on the statistics
Reporting Result
1. Report writing - Report the data obtained; Justification; give support by references and examples. Avoid Plagiarism !
2. Data presentation - less word; chart display the frequencies, trends, distribution or association.
3. Conclusion - summary of the result and answer the hypothesis which is related to the result. [Keep it simple!]
Comments
Post a Comment