Thermal processing calculation | How to determine D-value and z-value using graphical method/excel

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This video introduces D-value, z-value and shows how to determine them by plotting semilog survivor curve and thermal death curve in spreadsheet/excel.

1:10 Determine D-value
6:33 Determine z-value

Reference : R Paul Singh & Dennis Heldman - Introduction to Food Engineering 4th Edition
  1. Food Science Peeps
  2. thermal processing
  3. survivor curve
  4. semilog survivor curve
  5. D-value
  6. z-value
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i think this is wrong because D VALUE= total heating time÷ log( orignal population)-(log remaining)

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