Lecture Feb 5 - Perfumes It is unknown when people started...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Perfumes It is unknown when people started using plant products to scent themselves Egyptians were skilled by 3,000 B.C. o They were also used as incense in religious ceremonies, to scent homes and for bathing How perfumes are made Extract essential oils from plant parts Must use solvents because oils are not water soluble Odorants=ingredients in perfumes o Concrete Obtained by immerging plant part in solvent to draw out oils o Absolute Concrete can be extracted further with alcohol Alcohol evaporates, what is left is absolute o Distillation Plant parts exposed to steam Essential oils carried off Steam cooled, oils float on top and can be skimmed off Enfleurage o Traditional French process used to obtain concretes and absolutes o Used to capture delicate scents o Petals pressed into lard o Lard soaks up essential oils o Repeated until lard is saturated o Alcohol used to extract oils from lard
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Genetic engineering Plant breeders have been crossing plants to obtain new characteristics for thousands of
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/17/2008 for the course BIO_SCI 114 taught by Professor Russin during the Winter '08 term at Northwestern.

Page1 / 4

Lecture Feb 5 - Perfumes It is unknown when people started...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online