Natural perfume materials: a study of concretes, resinoids, floral oils and pomades.

Abstract

became interested as a result of their success in this work and instituted a similar program on Curacao.Consequently, Mr. Eastwood is extremely well versed in such operations and has completely revised the previous edition on basis of operational procedures necessary to set up a soilless culture unit.The topics covered include, as chapter titles indicate, General plant physiology, General types of soilless culture, Water culture, Sand culture, Gravel culture, The nutrient solution, Technical control of the nutrient solution, Technical control of the plant culture, General plant culture, Common detriments special chemicals, and Analysis of the nutrient solution. He also has an excel-

Biochemistry and genetics of floral scent: a historical perspective

“…The same solvents could also be used directly to extract the odiferous lipophilic substances, often called ‘essential oils’ (from ‘essence’, or smell), from macerated plant material, although this direct approach resulted in more impurities. Further purification of the essential oils could be obtained by distillation, although it was always appreciated that the heat used in distillation might cause chemical modification of the volatiles (Naves & Mazuyer, 1947).…”

“…In many cases, the same volatiles found in non‐floral plant material were eventually discovered in flowers as well (and vice versa). The perfume industry, on the other hand, had little incentive to identify volatile compounds in perfumes (Naves & Mazuyer, 1947). This was because they tried to keep the formulation of perfume secret (to prevent cheap imitations) and also because there was no consumer demand to know what was in the perfumes they were buying, unlike the interest of consumers in knowing what they actually ingest in their food and the desire of food companies to develop ‘artificial’ flavors that mimic natural ones.…”