1. This enzyme participates in monoterpenoid biosynthesis and limonene and pinene degradation. 2. Other aromatic essential oils present are limonene , caryophyllene, and farnesene. 3. As fragrances, air freshener preparations often include terpenes such as limonene . 4. The most widely practiced conversion of limonene is to carvone. 5. A classic example is the cyclization of geranyl pyrophosphate to form limonene . 6. This suggests independent evolution of the limonene biosynthetic pathway in these two lineages. 7. Citric flavors come from chemicals, such as limonene and gamma-terpinene linalool. 8. This enzyme participates in limonene and pinene degradation. 9. This technology produces sulfur limonene polysulphide ( proposed material ) using sulfur and limonene. 10. This technology produces sulfur limonene polysulphide ( proposed material ) using sulfur and limonene .