carbon-13

There’s also carbon-13, which is too short-lived to bother with, and carbon-14 which is rare but not too rare to be useful for dating relatively young organic samples, as we shall see.

THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

There’s also carbon-13, which is too short-lived to bother with, and carbon-14 which is rare but not too rare to be useful for dating relatively young organic samples, as we shall see.

THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

And Prototaxites displayed a much wider variation in its ratio of carbon-12 to carbon-13 content than would be expected in any plant.

Archive 2007-04-01 2007

The only thing carbon-13 does is measure how much carbon actually came from substances containing it.

Rapid health improvements with a Paleolithic diet | The Blog of Michael R. Eades, M.D. 2009

Deriving their energy from the sun and their carbon from carbon dioxide in the air, any given type of plant will typically contain a similar ratio of carbon-12 to carbon-13 as another plant of the same type.

Archive 2007-04-01 2007

Variations in carbon-13 therefore record how much photosynthetic growth was in progress when the shell-makers were alive in other words, how productive the biosphere was at that time.

Atomic Bullets Bring Life, Not Death 2006

Dr Svensmark looked at the long record of lifes bounty given by counts of heavy carbon atoms, carbon-13, in sedimentary rocks.

Atomic Bullets Bring Life, Not Death 2006

CO2 outgassed from the seascontains less carbon-13 than was proportionally present in the seawater.

KTH, Stockholm Conference « Climate Audit 2006

The isotope carbon-13 has 6 protons plus 7 neutrons.

Matter 2006

As a result, the sea becomes enriched in carbon-13, which is acceptable to sea creatures building their carbonate shells.

Atomic Bullets Bring Life, Not Death 2006