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
Tailpiece give certain desired effects. Tailpiece A tailpiece is a component on many stringed musical instruments that anchors one end of the strings, usually opposite the end with the tuning mechanism (the scroll, headstock, peghead, etc.). The tailpiece anchors the strings, so it must be strong enough to withstand their combined tension. Tailpieces of the violin family or viol families of instruments, including double basses, are attached by a "tailgut" looped around the tailpin or end button, which is let into the bottom bock of the instrument. Originally made of animal gut and adjusted with difficulty by means of a knot,