In microwave-plasma synthesis of few-layer graphene from hydrocarbon precursors. the carbon-to-oxygen and the carbon-to-hydrogen ratios are known to influence the product ratio of graphene to amorphous soot-like particles. While the role of oxygenated hydrocarbons and water as oxygen-supplying species has been studied before. in this paper. https://www.chiggate.com/satisfyer-pro-penguin-next-generation-on-sale/