JCE Online Journal of Chemical EducationDivision of Chemical Education, American Chemical SocietyAmerican Chemical Society
 | Subscriptions  | Software Orders  | Support  | Contributors  | Advertisers  | 

JCE Print
   Current Issue
 Previous Issues
 Supplements
 Search JCE Index

JCE Digital Library
   JCE DLib Catalog
   ChemInfo
 DataDriven Exercises
 DigiDemos
 Featured Molecules
 LivTexts
 LrnCom
 QBank
 SymMath
 WebWare

JCE Software
   Latest Releases
 Software & Video
 Downloads
 Support

Only@JCE Online
   JCE Online Store
 JCE HS CLIC
 JCE Discussion Forums
   Biographical Snapshots
 ChemEd Resource Shelf
 Hal's Picks
 Project Chemlab
 Reviewed WWW Sites
 "Web-Ed" Articles

About JCE
   Features
 Publications
 Operations
 Outreach
 Contact Us


 Home > Journal of Chemical Education > Issues > 2008 > July >
July 2008 Featured on the Cover
issue cover
July 2008
Table of Contents
Online Supplements
Issue Highlights
Annatto Seeds in the Laboratory. The main compound of annatto seeds, bixin, has antioxidant properties and an orange-red color, which makes annatto extract useful in the cosmetic and food industries. In the article by Teixeira, Durán, and Guterres, students encapsulate bixin in poly(3-hydroxybutyrate-co-3-hydroxyvalerate) particles by an emulsion–solvent evaporation method, which involves colloidal chemistry concepts such as surface tension, emulsion stability, and Ostwald ripening. McCullagh and Ramos discuss the separation of bixin from annatto seeds using column chromatography. In the experiment students isolate significant quantities of the carotenoid from small quantities of plant material and learn how to choose the appropriate solvent for a chromatographic separation by analyzing several potential solvents using thin-layer chromatography. Annatto seed components are also the JCE Featured Molecules for July.

Image of the fruit of mature Bixa orellana was taken in Kourou, French Guiana, and is courtesy of Arria Belli. The botanical drawing of Bixa orellana is figure 390 from Das Pflanzenreich. Hausschatz des Wissens. by E. Gilg and K. Schumann, published ca. 1900 by Kurt Stüber, and courtesy of http://www.biolib.de.
large cover
The cover was designed by Betsy True.

 Home > Journal of Chemical Education > Issues > 2008 > July > Featured on the Cover


Search JCE Index
Search Title, Authors, Keywords for
 Advanced Search
 Search for Laboratories

Subscriptions
 Subscription Info
 Order Forms

JCE HS CLIC

Our Secondary School editors work hard to distill all the JCE materials to produce a fraction of particular interest to high school teachers. We call it CLIC.
 JCE HS CLIC

Contributions Welcome
JCE welcomes your submission
 Contributors's Corner

Advertisers
In recent years we have worked hard to better match our advertisers with our readers. When shopping for chemistry education materials, visit our advertisers' WWW sites first.
 Recent Advertisers

Be An Ambassador
Take JCE along on your outreach missions. Copies of the Journal, guest access to JCE Online, our publications catalog, and more are available for your participants.
 Outreach with JCE

Comments to
jceonline@chem.wisc.edu		 Copyright © Division of Chemical Education, Inc., American Chemical Society.
All rights reserved.