These are nutrients, but they are known to scientists as food chemicals. As such, they are the focus, in this guide, of a unit each. The Periodic Table on the World-Wide Web Prepared by Mark Winter, University of Sheffield, England. Each of the many subtopics provides a trove of knowledge assembled by a senior chemist at the United States Geological Survey, home to this Website. The scientific descriptions strike an excellent balance in being both short and clear for the new student to a topic, while giving basic scientific principles useful to more advanced students.
Illustrations add understanding and interest.
The section on air bubbles, amber, and dinosaurs displays a mosquito which has been preserved in amber for 45 million years, and the isotope discussion is illustrated with cartoon parent and daughter decaying by half-lives. This site is available in a North American Version as well as a World Wide Version , that saves download time, and a Text and Figure Captions Only for printing a paper copy. This site created using Claris Home Page.