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Provide names and repeating units for the following polymers (spelling counts) – Each name =1 pt and  each repeating unit = 1 pt: PET LDPE PP HDPE EVOH PVAc Nylon 6, 6 PS PVOH LLDPE

Modified atmosphere packaged respiring foods can tolerate thermal abuse because temperature sensitivity of film permeation is similar to temperature sensitivity of produce respiration.

When a food product is in equilibrium with the surrounding relative humidity, its water activity, Aw, is equal to the relative humidity.

A dry packaged food loses weight during warehouse storage. It is unlikely that this product’s shelf life will be limited by moisture uptake.

We can achieve longer shelf life with moisture sensitive foods by increasing WVTR of packaging. 

The electrochemical process related to gaining of electrons is called (Hint: LEO says GER):

Moisture content can be defined with either wet or dry basis.  

If an epoxy lacquer was applied to a tin-plated steel can and tin remained anodic relative to steel throughout the can’s shelf life, (a) other than pitting of steel, what specific type of corrosion-based failure should we be looking for? (b) Suggest one possible solution.

If food in a tin-plated steel can provided a conducive environment for electrochemical activity where tin was anodic relative to the base steel, do you consider this situation desirable or not (Yes or No, briefly explain)?

The “double seam” is critical for creating a hermetic seal for glass packaging.