41. The difference between terpenes and terpenoids is that terpenes are hydrocarbons, whereas terpenoids contain additional functional groups. 42. The difference between terpenes and terpenoids is that terpenes are hydrocarbons, whereas terpenoids contain additional functional groups. 43. Terpenes and terpenoids are the primary constituents of the essential oils of many types of plants and flowers.44. He widened the area of his research, adding to it the chemistry of higher terpenes and steroids. 45. Plants of this genus are rich in terpenes , and some are used in native or folk medicine. 46. Most of the substances in the oil belong to the terpene group with limonene being the dominant one. 47. Like other terpenes , the ocimenes are nearly insoluble in water, but soluble in common organic solvents. 48. Terpenes are released by trees more actively in warmer weather, acting as a natural form of cloud seeding.49. Some workers prefer terpene resin for slide mounts, as it is both less acidic and cheaper than balsam. 50. The "'terpinenes "'are a group of isomeric hydrocarbons that are classified as terpenes .
