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  A novel route for identifying starch diagenetic products in the archaeological record

Oldenburg, T., Brown, M., Inwood, J., Radović, J., Snowdon, R., Larter, S., et al. (2021). A novel route for identifying starch diagenetic products in the archaeological record. PLoS One, 16(11): e0258779. doi:10.1371/journal.pone.0258779.

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 Creators:
Oldenburg, Thomas, Author
Brown, Melisa, Author
Inwood, Jamie, Author
Radović, Jagoš, Author
Snowdon, Ryan, Author
Larter, Steve, Author
Mercader, Julio1, Author              
Affiliations:
1Archaeology, Max Planck Institute for the Science of Human History, Max Planck Society, ou_2074312              

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Free keywords: Starches, Maillard reaction, Glycine, Archaeology, Carbohydrates, Oxygen, Maize, Sorghum
 Abstract: This work introduces a novel analytical chemistry method potentially applicable to the study of archaeological starch residues. The investigation involved the laboratory synthesis of model Maillard reaction mixtures and their analysis through Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry (FTICR-MS). Thus, starch from sixteen plant species were matured while reacting it with the amino acid glycine. The FTICR-MS analysis revealed > 5,300 molecular compounds, with numerous unique heteroatom rich compound classes, ranging from 20 (Zea mays) to 50 (Sorghum bicolor). These classes were investigated as repositories of chemical structure retaining source and process-specific character, linked back to botanical provenance. We discussed the Maillard reaction products thus generated, a possible pathway for the preservation of degraded starch, while also assessing diagenetic recalcitrance and adsorption potential to mineral surfaces. In some cases, hydrothermal experimentation on starches without glycine reveals that the chemical complexity of the starch itself is sufficient to produce some Maillard reaction products. The article concludes that FTICR-MS offers a new analytical window to characterize starchy residue and its diagenetic products, and is able to recognize taxonomic signals with the potential to persist in fossil contexts.

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Language(s): eng - English
 Dates: 2021-11-18
 Publication Status: Published online
 Pages: 17
 Publishing info: -
 Table of Contents: Introduction
Materials and methods
- Sample preparation and characterization
- FTICR-MS analysis
Results
- Characterization of Maillard reaction products based on atomic ratios (H/C, O/C, N/C, N/O) and compound class distribution
- Variations in molecular distribution
Discussion
- The Maillard reaction products
- Preservation pathway
- Diagenetic recalcitrance of Maillard reaction products
Conclusions
 Rev. Type: Peer
 Identifiers: DOI: 10.1371/journal.pone.0258779
Other: shh3108
 Degree: -

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Title: PLoS One
Source Genre: Journal
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Publ. Info: San Francisco, CA : Public Library of Science
Pages: - Volume / Issue: 16 (11) Sequence Number: e0258779 Start / End Page: - Identifier: ISSN: 1932-6203
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000277850