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
Catgut (horse) Catgut's only race away from Newmarket. Catgut did not run again until the First October meeting, when she finished second of the three runners in a Town Plate over the two-mile "Ditch In" course, beaten by Lord Exeter's filly Dulcinea. At the Second October meeting two weeks later, Catgut was assigned a weight of 97 pounds in an Oatlands Stakes, a handicap race over the Bunbury Mile course. She was made second favourite at odds of 3/1 but finished unplaced behind the four-year-old filly Romp. Catgut's final race came on 3 November at the Houghton meeting when she was entered