Ficus elastica

A genus of trees yielding a good type of natural rubber, of little commercial importance nowadays. The Ficus elastica is the well-known ornamental rubber plant. 

Figure 8.6. Fluorescence spectra of ficus elastica measured in backward direction (Fb, left) and forward direction (Ff, right). Excitation at 2a = 520 nm. Curve I from top surface, curve 2 from undersurface.

D-Glucaric acid was reported to occur as the magnesium salt in the sap of Ficus elastica,250 and 3-deoxy-mawzo-heptaric acid (cerheptaric acid) has been found to be widely distributed in the Cereus and Trichocereus genera of the Cactaceae family.251... 

Hevea species. Ficus elastica, Landolphia species, Castilloa elastica, Hancornia speciosa, Forsteronia species, Funtumia elastica and F. africana, Manihot species, Clitandra species and various species of Euphorbia furnish most of the Rubber of commerce. 

Third Type.—Instead of two parallel subsidiary cells, four are cut off, as in Heliconia, in species of Tradestantia, Araucaria, or four co five, as in Ficus elastica, or four to five or more, as in the Conifircs and Cycads. J... 

The arrangement of the trans and cis units in typical polyprenols was determined according to information obtained from the 13C NMR study of acyclic terpenes mentioned above. Poly-prenol-11 C(55), isolated from the leaves of Ficus elastica, was found to contain the -terminal unit, three internal trans units, six internal cis units, and a cis a-terminal unit from 1H NMR observations. Polyprenol-12 C(60), isolated from Ficus etastica and silkworm feces, showed a similar composition except that there were seven internal cis units. 

Figure 1. C-l methylene carbon signals in polyprenol-11 from Ficus elastica. Reproduced with permission from Ref. 10. Copyright 1979, The Biochemical Society.

Ficus elastica India, Burma Tree Assam rubber... 

For the production of chemical safety gloves, the supply industry uses only polymers as raw materials. The most common elastomer is natural rubber, obtained from natural resources (Indian rabber tree ficus elastica"). All others are manmade. 

Achras sapota Castilloa elastica Ficus elastica Hevea brasiliensis Manihot alaziovii Parthenium argentatum Taraxacum koksaghyz... 

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