date:Jul 28, 2016
ators (TTIs) have not been used very frequently to help ensure the safety of refrigerated foods, for example, although these devices have proven successful at showing whether a product is past its shelf life. A TTI is a simple, inexpensive device that can show an easily measurable, time-temperature dependent change that reflects the full or partial temperature history of a food product to which it is attached. TTI operation is based on mechanical, chemical, enzymatic or microbiological systems t