Access
To read this article in full you may need to log in, make a payment or gain access through a site license (see right).
Article
Nature 418, 289-290 (18 July 2002) | doi:10.1038/418289a;
Open Innovation Challenges
-
Direct Molecular Detection of Proteins and Nucleic Acids
This Challenge is looking for novel approaches to protein and nucleic acid detection. This is an Id...
-
Single-cell Analysis Platform
This Challenge is looking for novel approaches to analyzing changes at a single-cell level. This is...
- More Challenges
- Powered by:
nature jobs
International PhD Programme
- MRC Laboratory of Molecular Biology
- Cambridge, UK
Academic Neuropathologist
- University Hospitals Case Medical Center
- Cleveland, Ohio, USA
Archaeology: Cacao usage by the earliest Maya civilization
The Maya archaeological site at Colha in northern Belize, Central America, has yielded several spouted ceramic vessels that contain residues from the preparation of food and beverages. Here we analyse dry residue samples by using high-performance liquid chromatography coupled to atmospheric-pressure chemical-ionization mass spectrometry, and show that chocolate (Theobroma cacao) was consumed by the Preclassic Maya as early as 600 bc, pushing back the earliest chemical evidence of cacao use by some 1,000 years.
&
Abstract
To read this article in full you may need to log in, make a payment or gain access through a site license (see right).
