Biodegradable polymer which, edible films have gained more attention due to their environmentally-friendly characteristics, vast variety and availability, non-toxicity, and low cost. Biodegradable polymers have a long history, and since many are natural products, the precise timeline of their discovery and use cannot be accurately traced. One of the first medicinal uses of a biodegradable polymer was the catgut suture, which dates back to at least 100 AD. The first catgut sutures were made from the intestines of sheep, but modern catgut sutures are made from purified collagen extracted from the small intestines of cattle, sheep, or goats. The concept of synthetic
Philomel (musical instrument) Philomel (musical instrument) Philomel (; or "Stahlgeige" ) is the name of a musical instrument similar to the violin, but having four steel, wire strings. It has been invented around Monaco di Baviera in the middle of the nineteenth century and has got some similarities with the Bowedmelodion also known as Streichmelodion The philomel has a body with incurvations similar to those of the guitar; therefore, without corner blocks, the outline of the upper lobe forms a wavy shoulder reminiscent of the viols but more ornate and fanciful. The peg-box sometimes terminates in a fancy head instead of a scroll.