For example, they become obsessed with a technique such as fractionation and spend YEARS to master it because they think they will then get laid by the busloads using this technique. Most guys realize that they need to work on their seduction skills once they get relegated to the proverbial friend zone.
Expert seducers can simply lag over and spy into this woman’s eyes.
Then, with a indecent and soft recount, they will casually ask her what time it is.
The isotopic composition of the sample being measured is expressed as delta13C which represents the parts per thousand difference (per mille) between the sample carbon 13 content and the content of the international PDB standard carbonate (Keith et al., 1964; Aitken, 1990).
A d13C value, then, represents the per mille (part per thousand) deviation from the PDB standard.
Conversly the inorganic carbon dissolved in the oceans is generally 0.7% enriched in 13C relative to atmospheric carbon dioxide.