| 单词 | ngai camphor |
| 释义 | > as lemmasNgai camphor common camphor (C10H16O) is prepared by distillation and sublimation from Camphora officinarum ( Laurus camphora), a tree indigenous to Java, Sumatra, Japan, etc., and from other lauraceous trees. Many essential oils, as those of feverfew, lavender, etc., deposit varieties of camphor differing only in their action on polarized light. Borneo camphor or Borneol (C10H18O) is yielded by Dryobalanops Camphora, family Dipteraceæ, a tree growing in Sumatra and Borneo; it is less volatile than common camphor, and has a mingled camphoraceous and peppery smell. Ngai camphor, of the same chemical composition as Borneol, is produced in China and Burma by the distillation of Blumea balsamifera.extracted from camphorn.< as lemmas |
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