Transcript of Cast Iron: An Invention of Ancient China. Mass-production began in the Han dynasty. At the time of its invention, cast iron had many uses. Since the discovery of steel, iron (both cast and wrought) has become less common, as steel is generally stronger.
Asafoetida is a plant. It has a bad smell and tastes bitter. That probably explains why it is sometimes called âdevilâs dung.â. People use asafoetida resin, a gum-like material, as medicine. Asafoetida resin is produced by solidifying juice that comes out of cuts made in the plantâs living roots. Asafoetida is used for breathing problems including ongoing (chronic) bronchitis, H1N1 swine flu, and asthma.
1 Review. Amantadine is the generic form of the brand-name drug Symmetrel, which is used to treat and prevent respiratory infections caused by the influenza A virus. It can also treat symptoms of Parkinson's disease, such as stiffness and shaking, and conditions that are similar to Parkinson's disease.Amantadine was initially used to prevent influenza A during flu season. Later, doctors discovered its benefits for treating symptoms of Parkinson's disease.mantadine is an antiviral drug that is believed to work by stopping the growth of a virus. It helps treat the symptoms of Parkinson's disease by increasing the effects of dopamine.