Radiocarbon Dating of Gallstones for Timeline of Formation, Dormancy Analysis, and Correlation with Chemical/Microbial Composition: A Pilot Study on Gallstone Geobiology.

Background: India has a high incidence of gallstones, which can cause chronic inflammation and increase the risk of gallbladder cancer. Understanding the age and composition of gallstones can provide insights into their formation and growth. This study used ¹⁴C dating, FTIR, and metagenome analysis to explore the natural history, deposition rate, and microbial/chemical composition of gallstones.

Spatial distribution of fossil fuel derived CO over India using radiocarbon measurements in crop plants.

Examining the contribution of fossil fuel CO to the total CO changes in the atmosphere is of primary concern due to its alarming levels of fossil fuel emissions over the globe, specifically developing countries. Atmospheric radiocarbon represents an important observational constraint and utilized to trace fossil fuel derived CO (CO) in the atmosphere. For the first time, we have presented a detailed analysis on the spatial distribution of fossil fuel derived CO (CO) over India using radiocarbon (ΔC) measurements during three-year period.

Optimisation of CO absorption and liquid scintillation counting method for carbon-14 specific activity measurement in atmospheric air.

A method for the determination of C activity in the ambient air was optimised with the development of a simple setup for the regeneration of CO from carbonate sample and saturating the absorber in <45 min for direct determination of activity by liquid scintillation counting (LSC). Atmospheric CO was trapped in NaOH solution and precipitated as BaCO by adding BaCl. The carbonate sample was taken in a newly designed regeneration system, subjected to acid hydrolysis, and the absorber (CarboSorb-E) was saturated with the CO regenerated from carbonate sample.