Myrcene


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Myrcene

 

7-methyl-3-methylene-1,6-octadiene,

a terpene hydrocarbon; a colorless liquid with a distinctive tarry-citrus odor. Boiling point, 166°–168°C; density, 0.7905 g/cm3 at 20°C. It is virtually insoluble in water. Myrcene is found in certain essential oils (for example, 50 percent content in hop oil) and turpentine. It is prepared commercially by thermal isomerization of β-pinene, one of the constituents of turpentine. Myrcene is also a raw material in the manufacture of odoriferous substances, such as myrcenol.

References in periodicals archive ?
Typical seed oil is composed of I3-terpinene, camphor, limonene, geraniol and myrcene (Matasyoh et al., 2009).
citratus essential oils and their citral and myrcene compounds have been reported as substances with antimicrobial properties on S.
The coverage has recently been broadened from covering 11 different chemicals, including lead, cadmium, mercury, arsenic, chromium, PCBs and dioxins for fish oils, pulegone, myrcene, goldenseal root powder, Aloe vera non-decolorized whole leaf extract, and naphthalene.
FDA is no longer allowing the use of synthetically derived benzophenone, ethyl acrylate, eugenyl methyl ether (methyl eugenol), myrcene, pulegone and pyridine.
This essential oil is extracted by steam distillation of sage leaves and is constituted mainly of Aesculetin, Alpha Humulene, Alpha Thujene, Alpha Thujone, Alpha Terpineol, Alpha Terpenines, Alpha Pinene, Alpha Maaliene, Aromadendrene, Beta Pinene, Beta Copaene, Beta Thujone, Borneol, Camphor, Cineole, Caryophyllene Oxide, Camphene, Delta Cadinenes, Linalool, Limonene, Myrcene, Ocimenes, Octenol, Paracymene, Para Cymenol, Salviol, Terpineol, Thujanol and Terpinolene.
Spearmint extract consists of active chemical components such as carvone, [eth]-pinene, [eth]-pinene, 1,8-cineole, limonene, myrcene, and menthol.
The present invention relates to a studless winter tire including a tread formed from a rubber composition containing a predetermined amount of at least one myrcene resin selected from the group consisting of myrcene polymers with a Mw of 1,000-500,000, myrcene-butadiene copolymers with a Mw of 1,000-500,000, and myrcene-styrene copolymers with a Mw of 1,000-150,000; and a predetermined amount of a silica with an [N.sub.2]SA of 40-400 [m.sup.2]/g, the rubber component containing a predetermined amount of a high-cis polybutadiene with a cis content of 95% by mass or more.
The main constituents of EOLs are the monoterpenoids thymol, p-cymene and myrcene, and the sesquiterpene caryophyllene (1).
The percentage composition of myrcene in rosemary was 3.99 [+ or -] 0.2 and 5.01 [+ or -] 0.3 in eucalyptus, [beta]-lin1oo1 (0.45 [+ or -] 0.01, 0.50 [+ or -] 0.02), nerol (15.00 [+ or -] 0.02, 23.98 [+ or -] 0.03), citral (18.01 [+ or -] 0.02,14.02 [+ or -] 0.02), limonene oxide (0.40 [+ or -] 0.03, 1.05 [+ or -] 0.02), cineole (9.23 [+ or -] 0.03, 10.00 [+ or -] 0.01), berbenol (4.56 [+ or -] 0.02, 2.22 [+ or -] 0.02), and oleic acid (27.67 [+ or -] 0.01, 19.98 [+ or -] 0.02) (Table 4).
GC analysis proved the presence of the following: the main constituents in the oregano oil were carvacrol (58%), p-cymene (9.9%), myrcene (3%), and thymol (1.8%); analysis of the marjoram oil revealed the foremost contents to be terpinen-4-ol (23.5%), [alpha]-terpinene (9.6%), and sabinene (8.5%) (outcomes from said GC analysis are not included in Table 1).
[12], at least 12 Lippia chemotypes have been described according to the major chemical components, namely, citral, linalool, carvone, limonene, y-terpinene, citral-myrcene, citral-limonene, citral-caryophyllene, citral-germacrene D, carvone-limonene, 1,8-cineole-camphor, 1,8-cineol-limonene, and limonenepiperitone, and there are predominantly monoterpene-like compounds such as citral, myrcene, and limonene.