The scientists also tracked the movement of nitrogen fertilizers by monitoring labelled nitrogen-15
stable isotopes atoms with extra or missing neutrons in the soil to determine how effectively the crops are responding to and taking up the fertilizer.
Like their modern elephant counterparts, they should have been restricted to a diet of plants, but their bones reveal levels of nitrogen-15
That hint is the ratio of one isotope, or form, of nitrogen, called nitrogen-14, to another isotope, called nitrogen-15
The stable isotopes market is dominated by deuterium (D2), oxygen-18 (O-18), carbon-13 (C-13), and nitrogen-15
Over time, nitrogen-15
in the soil decreased slowly, with small amounts taken up by plants or leached into groundwater each year.
Nitrogen balance of nitrogen-15
applied as ammonium sulphate to irrigated potato in sandy textured soil.
Several soil processes, such as denitrification, mineralisation, nitrification, immobilisation, and ammonia volatilisation, induce nitrogen-15
Brooks PD, Stark JM, McInteer BB, Preston T (1989) Diffusion method to prepare soil extracts for automated nitrogen-15
The technology developed by Martek involves the placement of deuterium, carbon-13 and nitrogen-15
labeled isotopes into each amino acid backbone.
Availability of nitrogen from nitrogen-15
labeled Azolla pinnata and urea to flooded rice.
Although recent developments in nuclear magnetic resonance (NMR) have revolutionized structure determinations by incorporating stable isotopes carbon-13 (13C) and nitrogen-15
(15N) into the target proteins, prior to the development of Martek's Celtone M technology, "glycoproteins" have not been labeled with these stable isotopes.
The Asia-Pacific stable isotopes market is dominated by deuterium (D2), oxygen-18 (O-18), carbon-13 (C-13), and nitrogen-15