更多purpurin例句

1. The presence of the same red pigment Bacterio-purpurin seemed justly to indicate the existence of common chemical processes.
2. These are cochineal, mixed with certain chemicals, hot purpurin sulphuric acid, and the red dye of the banana-eater.
3. The same operations have also another end--to transform the purpurin into its hydrate, which is brighter and more solid.
4. The Purpurin, like some of the murices, when mutilated, exude a reddish-purple fluid.
5. Madder contains two closely allied colouring matters, namely, alizarin and purpurin.