Mint plant

Menthene, a hydrocarbon found in mint plants, has the systematic name 1 - i soprop v -4 - met h y Icyc lohexene. Draw its structure. 

Plant. The reported half-lives of methomyl on cotton plants, mint plants, and Bermuda grass were 0.4-8.5, 0.8-1.2 and 2.5 d, respectively (Willis and McDowell, 1987). 

As another example of the effects of shape and molecular handedness, look at the substance called carvone. Left-handed carvone occurs in mint plants and has the characteristic odor of spearmint, while right-handed carvone occurs in several herbs and has the odor of caraway seeds. Again, the two structures are the same except for their shapes, yet they have entirely different odors. 

It may seem odd to you to have a chemical process to produce menthol, which would be available naturally from mint plants. This process is now responsible for about half the world s menthol production so it must make some sort of sense The truth is that menthol cultivation is wasteful in good land that could produce food crops such as rice... 

SYNS l-(3-FURANYL)-4-METHYL-l-PENTANONE D P-FURYL ISOAMYL KETONE D l-(3-FURYL)-4-METHYL-1-PaNTANONE PURPLE MINT PLANT EXTRACT... 

The fact that menthol is produced from both renewable and fossil feedstocks allows for an interesting study in sustainability. In order to produce the same crop year after year, it is necessary to use fertilisers to replenish the nitrogen and minerals which the plant takes from the soil. Secondary metabolites such as menthol and essential oils occur at a level of, at most, only a few per cent of the dry weight of the herb. Therefore, in order to produce an economic return, it is necessary to use efficient, mechanical methods of cultivation and harvesting. A full life cycle analysis of menthol production reveals that production from cultivation of mint plants consumes more fossil fuel, produces more carbon dioxide effluent and has more environmental impact than either of the leading synthetic routes. 

Perilla Ketone. l-(3-Furanyl)-4-methyl-l-penta-none l-(3-furyl)-4-meihyl-l-pentanone 0-turyl isoamyt ketone. C HmO, mol wt 166.22. C 72.26%. H 8.49%. O 19.25%. Potent pulmonary edcmatogenjc agent in animals. Isoln from the mint plant, Perilla fruteseens Britton, Labi-atae, and structure R. Goto, J. Pharm. Soc. Japan 57, 77 (1937). Synthesis T. Matsuura, Bull Chem. Soc, Japan 30, 430 (1957) K. Rondo, M. Matsumoto, Tetrahedron Letters 1976, 4363 T. Kitamura et of., Synth. Common. 7, 521 (1977) K. Inomata et al, Chem. Letters 1979, 709. Potent lung toxin implicated in emphysema of grazing cattle B. I. Wilson et al. Science 197, 573 (1977). 

Peppermint oil. The following p. are distinguished on the basis of the mint plant involved ... 

One of the fragrant components in mint plants is menthene, a compound whose lUPAC name is l-isopropyl-4-methylcyclohexene. Draw a structural formula for menthene. 

The compounds menthone and menthol are fragrant substances present in an oil produced by mint plants ... 

One of the best understood biosynthetic pathways for terpenoids is the biosynthesis for menthol in mint plants. All the enzymes are identified, cloned, and characterized [43]. Menthol plays an important role as aroma in food, cigarettes, and medications for the pulmonary tract and in cosmetics. Improvements of yield or... 

Figure 2.5 Trichomes of mint plants (a) and resulting phenotype of a somatic hybridization (b, hybrid) between mint varieties (b, E33, E87 leaves of parent lines used for protoplast fusion, unpublished results E. Baumann, Phytowelt GreenTechnologies GmbH).

Ozer, E.O., Platin, S., Akman, U. and Horta9su, 0. (1996) Supercritical carbon dioxide extraction of speannint oil from mint-plant leaves. Can. J. Chem. Engs. 74,920-928. 

A whole bunch of bewigged European scientists solved the puzzle piece by piece over a period of about 100 years. In 1780, the English chemist Joseph Priestley found that plants could restore air which has been injured by the burning of candles . He used a mint plant, and placed it into an upturned glass jar in a vessel of water for several days. He then found that the air would neither extinguish a candle, nor was it all inconvenient to a mouse which I put into if. In other words, he discovered that plants produce oxygen (luckily for the mouse ). 

Mint plants (Lamiaceae), for example in common thyme (ThymtAS vulgaris), contain substituted biphenyls derived from monoter-penic alcohol thymol, their o-quinones (10-178) or p-quinones (10-179), which exhibit marked antioxidant activities. Among the most active natural antioxidants with anti-inflammatory effects is carnosic acid, also known as rosmaricine (10-180), which is accompanied by carnosol (picrosalvin, 10-181). These two antioxidants represent about 15% by weight of commercial extracts of rosemary... 

Peiilla ketone, produced by the purple mint plant (Perilla frutescens)... 

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