Natural rubber Natural rubber Natural rubber, also called India rubber or caoutchouc, as initially produced, consists of polymers of the organic compound isoprene, with minor impurities of other organic compounds, plus water. Malaysia and Indonesia are two of the leading rubber producers. Forms of polyisoprene that are used as natural rubbers are classified as elastomers. Currently, rubber is harvested mainly in the form of the latex from the rubber tree or others. The latex is a sticky, milky colloid drawn off by making incisions in the bark and collecting the fluid in vessels in a process called "tapping". The latex then is
Substance-related disorder recently published DSM-5 combined substance abuse and substance dependence into a single continuum; this is simply known as substance use disorder and requires more presenting symptoms before a diagnosis is made. It also considers each different substance as its own separate disorder, based upon the same basic criteria. It also distinguishes the difference between dependence and addictions as two separate disorders, not to be confused. There are many potential complications that can arise due to substance abuse such as severe physiological damage, psychological changes and social changes that are often not desirable. Physiological damage is often the most obvious, observed