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Poriol is a C-methylated flavanone, a type of flavonoid. It is found in Pseudotsuga menziesii in reaction to infection by Poria weirii.


Prenol is a flavouring ingredient. It is a natural alcohol.


Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. It is typically light colored.Pumice is created when super-heated, highly pressurized rock is violently ejected from a volcano.Pumice is composed of highly microvesicular glass pyroclastic with very thin, translucent bubble walls of extrusive igneous rock. It is commonly, but not exclusively of silicic or felsic to intermediate in composition.Pumice is widely used to make lightweight concrete or insulative low-density cinder blocks.It is also used as an abrasive, especially in polishes, pencil erasers, cosmetic exfoliants, and the production of stone-washed jeans.It was also used in ancient Greek and Roman times to remove excess hair.Pumice is also used as a growing substrate for growing horticultural crops.

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Quartz is the second most abundant mineral in the Earth's continental crust, after feldspar. There are many different varieties of quartz, several of which are semi-precious gemstones.Its been the most commonly used minerals in the making of jewelry and hardstone carvings. Quartz is used in the making of sandpaper, optics, glass, liquid filters, circuit boards, computer components, cement , mortar, and jewelry. Quartz crystals are also piezoelectric meaning when an electrical current passes through them they vibrate a small amount. Time can be measured from the vibrations of the quartz crystals so quartz crystals are often used in clocks.

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Radium is an alkaline earth metal that is found in trace amounts in uranium ores. Radium, in the form of radium chloride, was discovered by Marie Sklodowska-Curie and Pierre Curie in 1898. It was isolated in its metallic state by Curie and Andr√©-Louis Debierne through the electrolysis of radium chloride in 1910. Some of the few practical uses of radium are derived from its radioactive properties. More recently discovered radioisotopes, such as 60Co and 137Cs, are replacing radium in even these limited uses because several of these isotopes are more powerful emitters, safer to handle, and available in more concentrated form. It exhibits luminescence, as do its salts. Radium imparts a carmine red color to a flame. Radium emits α, β, and γ rays and when mixed with beryllium produces neutrons.

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Colorless crystals. Corrosive to copper, brass, iron, and tin plate. Used as an insecticide.

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