Thank you GhostFinger! Very nice!
This bit especially piqued my interest:
||Remarkably, it was observed that 20 nm gold colloids could not pass through inter-vessel pit membranes of some deciduous tree species, indicating an adequate size rejection to remove viruses from water.
According to http://www.plantphysiol.org/content/131/1/41.short
, and a bit of Googling around Wikipedia shows that the 4 tree species that were used in this part of the study were:
(commonly known as the red ash or soap tree... a species in the Rhamnaceae family. It is endemic to Australia, being found in New South Wales, Queensland, Northern Territory and the northeastern tip of Western Australia. The Rhamnaceae are a large family of flowering plants, mostly trees, shrubs, and some vines, commonly called the buckthorn family)
(known as the python tree is a rainforest myrtle of eastern Australia. Other common names include Lignum-vitae, Scrub Ironwood and Smooth-barked Ironwood.)
Hmm..Ironwood... Ironwood is a common name for a large number of woods that have a reputation for hardness. Usage of the name may (or may not) include the tree that yields this wood. Some of the related American species are:
Acacia estrophiolata, Southern ironwood
Acacia stenophylla, Ironwood
Carpinus caroliniana, American hornbeam
According to http://anpsa.org.au/c-gil.html
, this is another Australian species. Cochlospermum is a genus of about 20 species with four occurring in Australia.
Brachychiton australis, commonly known as the broad-leaved bottle tree, is a small tree of the genus Brachychiton found in eastern Australia. It was originally classified in the family Sterculiaceae, which is now within Malvaceae.
The Malvaceae, or the mallows, are a family of flowering plants estimated to contain 244 genera with 4225 known species. Well-known members of this family include okra, cotton, and cacao. The largest genera in terms of number of species include Hibiscus (300 species)
I hope someday virus-removal testing is done on American species. (I would gladly trade my kingdom for a well-equipped lab!)
Because every water purification method has its advantages and disadvantages/limitations, I am always interested in exploring new ways of purifying water.