Eyes (cheese): Eyes are the round holes that are a characteristic feature of Swiss-type cheeseP.L.Timeline of agriculture and food technology: ==Paleolithic==Powdered milk: Powdered milk or dried milk is a manufactured dairy product made by evaporating milk to dryness. One purpose of drying milk is to preserve it; milk powder has a far longer shelf life than liquid milk and does not need to be refrigerated, due to its low moisture content.ActoBiotics: ActoBiotics (a registered trademark) consist of food-grade bacteria (Lactococcus lactis), genetically engineered to synthesize and secrete therapeutic proteins and peptides in situ. ActoBiotics are delivered to patients via oral administration instead of injection, and specifically target receptors and cells localized in gastrointestinal (GI) tissues.Propionibacterium freudenreichii: Propionibacterium freudenreichii is a Gram-positive, non-motile bacterium that plays an important role in the creation of Emmental cheese, and to some extent, Jarlsberg cheese, Leerdammer and Maasdam cheese. Its concentration in Swiss-type cheeses is higher than in any other cheese.M17 agar: This bacterial growth medium was developed in 1971 for Lactococcus species isolated from milk products. It was originally called M16 medium,Lowrie, R.