can only colonize (live in) the human throat!
It is endemic (meaning it’s pretty much a part of nature and difficult to completely get rid of) to sub-Saharan Africa, where the worst-hit regions are known as the African Meningitis Belt. It is also naturally competent, meaning that it can be transformed through taking in genes from other organisms for its own use. Over time it must have used this to adapt from living in the wild to living only in humans!application.
In Patent Literature 2, there is a disclosure of a “method of producing amorphous silica from chaff, characterized by: treating chaff with an acetic acid-containing solution to separate an alkali component contained in the chaff from the chaff through dissolution in the acetic acid-containing solution; washing and drying the chaff from which the alkali component has been separated; carbonizing the dried chaff through thermal decomposition to form chaff charcoal; and calcining the chaff charcoal to produce high-purity silica.”
However, the recovery method disclosed in Patent Literature 2, in which the acetic acid treatment is performed, is obviously different from the recovery method of the present application.
In Patent Literature 3, there is a disclosure of a “production method for finely powdered silica, characterized by: dissolving precipitated silica derived from a