Assertion: selenium | /r/AtLocation | synthetic rubber
Facets:
value: to improve resistance
type: PURPOSE
Source sentences:
text: Selenium is added to synthetic rubber to improve resistance to abrasion, it has been added to brass, along with bismuth, to replace lead in pipes, and it is used, as sodium selenate, as an insecticide to stop attacks on flowering plants such as chrysanthemums and carnations.