Pichat, "Tracing contamination sources in soils with Cu and Zn
isotopic ratios," Science of the Total Environment, vol.
Oxygen
isotopic compositions ([delta][sup.18][O.sub.carb]) of pedogenic carbonates reflect both the temperature of precipitation and [delta][sup.18]O composition of the fluid that the carbonates crystallized from (e.g., [14]), and as a result, have been used to reconstruct both of those variables by assuming the other, through an independent constraint on one variable or other, and more recently, through the use of "clumped isotope" measurements, which produce temperatures that are independent of the starting fluid
isotopic composition.
* The determination of the number and the molecular and
isotopic composition of the gases used as reference materials.
In the present study, thirty-nine glass samples were analysed from the
isotopic and chemical points of view.
Here we present an alternative method of isotope analysis that could overcome a number of constraints and therefore has potential for wider adoption of
isotopic techniques as part of AW-IPM programs.
In this study,
isotopic turnover rates, discrimination factors, and C:N ratios were used as indicators of diet performance and nutrient assimilation of larvae in relation to their diet (Roth & Hobson 2000.
This was considered to be a variant of the
isotopic phenomenon.
Evidence from
isotopic composition of geoporphyrins
'The
isotopic analysis (IA) is based upon the use of mass spectrometers or radioactive radiation counters.
Keywords: Multiple autoimmune syndrome, lichen planus, vitiligo, alopecia areata,
isotopic phenomenon.
We examined the
isotopic niche of Arctic Terns during these critical early periods of their breeding season, as well as their trophic ecology in winter, after Arctic Terns have migrated to the Antarctic Ocean (Egevang et al., 2010; Fijn et al., 2013).
Researchers have previously found that diatoms and sponges (which build their skeletons from silica) gradually buried in ocean sediments since the last ice age have a different silicon
isotopic signature to their modern-day relatives.