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While sometimes used interchangeably with "terpenes", terpenoids contain additional functional groups, usually containing oxygen. [1] When combined with the hydrocarbon terpenes, terpenoids comprise about 80,000 compounds. [2] They are the largest class of plant secondary metabolites, representing about 60% of known natural products. [3]
Monoterpenes are a class of terpenes that consist of two isoprene units and have the molecular formula C 10 H 16. Monoterpenes may be linear (acyclic) or contain rings (monocyclic and bicyclic). Modified terpenes, such as those containing oxygen functionality or missing a methyl group, are called monoterpenoids. Monoterpenes and monoterpenoids ...
Terpenes are classified by the number of carbons: monoterpenes (C 10), sesquiterpenes (C 15), diterpenes (C 20), as examples. The terpene alpha-pinene is a major component of the common solvent, turpentine. The one terpene that has major applications is natural rubber (i.e., polyisoprene).
The following table lists the largest biotechnology and pharmaceutical companies ranked by revenue in billion USD. The change column indicates the company's relative position in this list compared to its relative position in the preceding year; i.e., an increase would be moving closer to rank 1 and vice versa.
The Fortune 500 list of companies includes only publicly traded companies, also including tax inversion companies. There are also corporations having foundation in the United States, such as corporate headquarters, operational headquarters and independent subsidiaries. The list excludes large privately held companies such as Cargill and Koch ...
The vast heterogeneity of structures underlying this class of compounds makes generalizations difficult; they're a subclass of terpenoids, oxygenated derivatives of terpene hydrocarbons. Terpenes in turn are formally made up of five-carbon isoprene units (The alternate steroid base is a terpene missing a few carbon atoms). Derivatives are ...
This is a list of United States–based companies having the most employees globally. For some companies listed, the majority of total employees live and work in other countries. For some companies listed, the majority of total employees live and work in other countries.
Pages in category "Health care companies of the United States" The following 10 pages are in this category, out of 10 total. This list may not reflect recent changes. A.