(n.) A tenacious, elastic, gummy substance obtained from the milky sap of several plants of tropical South America (esp. the euphorbiaceous tree Siphonia elastica or Hevea caoutchouc), Asia, and Africa. Being impermeable to liquids and gases, and not readly affected by exposure to air, acids, and alkalies, it is used, especially when vulcanized, for many purposes in the arts and in manufactures. Also called India rubber (because it was first brought from India, and was formerly used chiefly for erasing pencil marks) and gum elastic. See Vulcanization.
Example Sentences:
(1) The addition of amine fluorides to a copal recin (Copalite) and a chlorine caoutchouc varnish (Pergut S-40) has been studied.
(2) Isolation of pentachlorophenol is carried out from water extracts obtained from the dry caoutchouc films, so the same method can be used for examination of the rubber articles designed for the medicinetoo.
(3) The tonoplast-bound ATPase of Hevea brasiliensis (caoutchouc tree) was solubilized with dichloromethan and purified 100-fold with two ammonium sulfate precipitation steps and a G-200 gel filtration step.
(4) Preparation of shoulder-specimens after injection of silicone-caoutchouc are done to examine the vascular system.
(5) Investigating possible application of the DCT-30 thermoelastoplastic shows advantages of some physico-technical properties of this product based on natural caoutchouc and latex by comparison with base-rubber onene.
(6) Silicon-caoutchouc and Vestolit-PVC were the substances used.
(7) Working environments have been tested in plants producing asbestos products, asbestos-cement products, textile asbestos products, asbestos-caoutchouc plates, asbestos boards and asbestos frictional materials for automotive industry, Measurements of total dust concentrations and concentrations of asbestos fibres 5 micron long supported workers' exposure investigations.
Ule
Definition:
(n.) A Mexican and Central American tree (Castilloa elastica and C. Markhamiana) related to the breadfruit tree. Its milky juice contains caoutchouc. Called also ule tree.