Flowchart Symbols and Notation | Lucidchart
FIXATION. Fresh tissue samples must be preserved for future examination. This process is called fixation, and the resulting specimen is described as fixed.. Boiling an egg and pickling a cucumber represent examples of fixation, in which heat or chemistry stabilizes the organic materials.PREPARATION OF FOOD PREPARATION OF FOOD. Food preparation has been a constant chore since the first human beings picked up cutting and mashing stones. In return, this effort to make food edible, preserve it, and transform its character has sustained an ever-increasing population. Many techniques, including grinding, sifting, drying, salting, sealing, fermenting, and applying heat, are .