Givani De Vigo first described it in the 15th centuary, and most famously described by Pierre Fauchard in the 18th centuary. It is the oldest filling material still in use in dentistry today.
Gold is a very good material for leaf-type electroscope. It is very soft and light and conductive, while being non-corrosive. Other materials can be used but none seem quite as good.
Yes, you can use the banana leaf as packaging material.Specially in India they use the banana leaf to wrap the meals in hotels for take away porpose.But it would be better if u just heat the leaf...