Results 191 to 200 of about 52,149 (242)
New Zealand Journal of Marine and Freshwater Research, 1997 Stable isotopes of carbon (C) and nitrogen (N) were studied in 11 stream communities in the Waikato region of New Zealand. From comparisons of mean d13C and d15N values, food webs in the shaded, forest streams were clearly based on allochthonous material
Brendan J Hicks
exaly +2 more sources
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Carbon and oxygen isotope microanalysis of carbonate
Rapid Communications in Mass Spectrometry, 2009Abstract Technical modification of the conventional method for the δ 13 C and δ 18 O analysis of 10–30 µg carbonate samples is described.
Tatiana A, Velivetskaya +2 more
openaire +2 more sources
Carbon Isotope Abundance in Meteoritic Carbonates
Science, 1963The C 13 /C 12 ratio in the carbonate minerals of Orgueil, a carbonaceous chondrite, is 6 percent greater than the ratio in any known terrestrial carbon. The effect may be produced by a chemical isotope fractionation involving processes not common on earth, or it may be the result of ...
openaire +2 more sources
Deuterium Isotope Effect on Carbon Isotope Fractionation in Photosynthesis
Science, 1967Plants grown in D 2 O show a decreased tendency to fractionate carbon-13 during photosynthetic incorporation of carbon dioxide. The isotopic ratio C 13 /C 12 of the tissues of deuterated plants appears to be proportional to the deuterium content of the tissue.
R A, Uphaus, J J, Katz
openaire +2 more sources
The carbon-isotope signature of diagenetic carbonates
2020<p>Diagenetic carbonates often show large variations in their carbon isotope compositions. Variations are mainly the result of isotope fractionation effects during microbial metabolic processes, and these processes themselves may induce carbonate formation.
Patrick Meister, Carolina Reyes
openaire +1 more source
Carbon Isotopes and Microbial Sediments
2000Microbial sediments of the biolaminated type, generated by the matting behavior of preferentially prokaryotic microbenthos, commonly carry the isotopic signatures of both the primary microbial biomass and of the carbonate of the surrounding sediment matrix.
openaire +2 more sources
Isomeres and isotopes of carbon
2020The nuclear geometry has been developed by analogy with the fullerene geometry. On the base of this geometric approach, the structure of carbon isomers and isotopes, which can be obtained by means of nuclear synthesis, has been designed. The mechanisms of possible nuclear reaction are discussed. Carbon is an unusual element.
openaire +1 more source
1983
The 13C + 13C total fusion cross section has been determined in the range 3.26 ≤ Ec.m. ≤ 8.0 MeV using Ge(Li) detector measurements of low-lying transitions in the residual nuclei and a statistical model calculation of excited state populations. Six different residual nuclei have been observed and their production yields are given.
openaire +1 more source
The 13C + 13C total fusion cross section has been determined in the range 3.26 ≤ Ec.m. ≤ 8.0 MeV using Ge(Li) detector measurements of low-lying transitions in the residual nuclei and a statistical model calculation of excited state populations. Six different residual nuclei have been observed and their production yields are given.
openaire +1 more source