Personal profile

Research interests

In 2019, I began my PhD project entitled 'Historical Records of Climate Preserved in Biomolecular Components of Calendrically-dated Parchment Manuscripts and Seals' under the supervision of Dr Melanie Roffet-Salque (University of Bristol) and Professor Matthew Collins (University of Cambridge & University of Copenhagen). This research is co-funded by the European Research Council (Beasts2Craft) and the Carlsberg Foundation (ArcHives; PI: Professor Matthew Collins).

My PhD forms a part of two collaborative projects (Beasts2Craft and ArcHives) and comprises three main themes surrounding the analysis of lipids within parchment manuscripts and wax seals. This will be achieved by (1) investigating diachronic and geographical changes in the molecular composition of parchment manuscripts and wax seals by GC-MS and HT-GC-MS; (2) determining the isotopic composition of lipids by GC-C-IRMS and GC-TC-IRMS for the reconstruction of palaeodietry and palaeocliamtic records (3) validating novel compound-specific approaches for radiocarbon dating. By addressing these themes, we will test hypotheses surrounding the impact of historical events upon the documents; gain insight into past climatic events and make the first steps toward provenancing historical beeswax and parchments. 

Keywords

  • Organic Geochemistry
  • Archaeological Chemistry
  • Analytical Chemistry
  • Lipid Analysis
  • Gas Chromatography
  • Mass Spectrometry
  • Stable Isotope Analysis
  • Compound-Specific
  • Radiocarbon Dating
  • Method Development
  • Palaeoclimate
  • Reconstruction
  • Beeswax
  • Resin
  • Parchment
  • Wax Seal

Fingerprint

Dive into the research topics where Samuel Johns is active. These topic labels come from the works of this person. Together they form a unique fingerprint.
  • 1 Similar Profiles

Collaborations and top research areas from the last five years

Recent external collaboration on country/territory level. Dive into details by clicking on the dots or