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
Janzi (musical instrument) Janzi (musical instrument) Janzi is a Ugandan string instrument invented by Ssewakiryanga James Junior also known as Ssewa Ssewa. It was vetted and accorded the Utility Model Protection by African Regional Intellectual Property Organization (ARIPO) Zimbabwe and Uganda Registration Services Bureau in 2017. The instrument has been a major instrument on all Janzi Band and Ssewa's performances since its inception. The Janzi has two long wooden necks on the left and right, with a narrow space in between. It is made up of 22 strings, 11 strings on either side attached to the sound box with plastic strings. The Janzi