GLYCOSIDES PART 3

blue pigment/ blue dye

form colloidal solutions in water that foam upon shaking- FROTH TEST (bumbles formation or foam - when shaken)

standard for Froth test

It may be obtained from vanilla or prepared synthetically from other sources.

can be made synthetically through a series of chemical reactions

represent the more mature fruits in which dehiscence has taken place

they cut into short lengths

the odor is somewhat unpleasant and the variety is less suitable for flavoring.

Is a reddish brown in color and about as long as the Mexican variety but sharply attenuated and twisted in lower portion.

It resembles the Mexican variety but it is about two thirds as long, blacker in color, usually covered with a sublimate of needle shaped vanillin crystals and possess a coumarin like odor