Results 21 to 30 of about 130,022 (84)

Carbon isotopes in clastic rocks and the Neoproterozoic carbon cycle [PDF]

American Journal of Science, 2020
It has been proposed that isotopically light inorganic carbon precipitated diagenetically in clastic sediments can explain the large carbon isotopic excursions recorded in Neoproterozoic carbonates. To date, however, the data needed to test this hypothesis have been limited. Here we report the analysis of ca.
Canfield, DE, Knoll, AH, Poulton, SW, Narbonne, GM, Dunning, GR   +4 more
openaire   +3 more sources

Life-history traits of the giant squid Architeuthis dux revealed from stable isotope signatures recorded in beaks [PDF]

, 2010
Peer ...
Alejandro B. Rodríguez-Navarro, Bode, Boyle, Cabana, Cherel, Cherel, Cherel, Cherel, Cherel, Chris S. Romanek, Clarke, Deagle, DeNiro, DeNiro, Field, González, Graham J. Pierce, Grist, Guerra, Guerra, Guerra, Hernández-López, Higgins, Hobson, Hobson, Hobson, Hunt, Jackson, McCutchan, Mendes, Miserez, Nixon, Parry, Pedro Álvarez-Lloret, Perales-Raya, Rau, Raya, Rodhouse, Roper, Ruiz-Cooley, Ruiz-Cooley, Schimmelmann, Seibel, Smith, Stowasser, Takai, Vanderklift, Webb, Zuur, Ángel F. González, Ángel Guerra   +50 more
core   +1 more source

An Isotope of Carbon, Mass 13 [PDF]

Physical Review, 1929
THE bands belonging to the Swan spectrum of carbon appear in the vacuum electric furnace at about 2400° C. At temperatures above 2600° they are strong and clear-cut, even the band at λ6191, difficult to obtain in the carbon arc, being well defined. It has been noted by one of us, during a variety of electric furnace investigations, that plates on which
Arthur S. King, Raymond T. Birge
openaire   +3 more sources

Laser ablation molecular isotopic spectrometry of carbon isotopes [PDF]

Spectrochimica Acta Part B: Atomic Spectroscopy, 2015
Abstract Quantitative determination of carbon isotopes using Laser Ablation Molecular Isotopic Spectrometry (LAMIS) is described. Optical emission of diatomic molecules CN and C2 is used in these measurements. Two quantification approaches are presented: empirical calibration of spectra using a set of reference standards and numerical fitting of a ...
Jinesh C. Jain, Xianglei Mao, Dustin L. McIntyre, Richard E. Russo, Alexander A. Bol′shakov   +4 more
openaire   +2 more sources

Use of stable isotopes, organic and inorganic chemistry to identify pollution sources and weathering processes in two small tropical rivers in southwestern India [PDF]

, 2012
The two main objectives of this study were to assess pollution dynamic from organic and inorganic major ion chemistry and stable isotopes (δ15N and δ18O) and to determine the weathering processes using carbon isotopes in two tropical river basins, i.e ...
Balakrishna, Keshava, Gurumurthy, G. P., Lambs, Luc, Probst, Jean-Luc, Teisserenc, Roman, Tripti, Mondal   +5 more
core  

The Giant Pairing Vibration in Carbon isotopes [PDF]

Journal of Physics: Conference Series, 2016
The (13)C((18)O,(16)O)(15)C and (12)C((18)O,(16)O)(14)C reactions at 84 MeV incident energy were explored up to high excitation energy of the residual nucleus thanks to the use of the MAGNEX spectrometer to detect the ejectiles. In the region above the two-neutron separation energy, a resonance has been observed in both nuclei, attributed to the Giant ...
Francesco Cappuzzello, Francesco Cappuzzello, Manuela Cavallaro, J. A. Scarpaci, F. Azaiez, C. Agodi, N. de Séréville, Diana Carbone, M. Assié   +8 more
openaire   +3 more sources

Chemostratigraphy of Neoproterozoic carbonates: implications for 'blind dating' [PDF]

, 2001
The delta C-13(carb) and Sr-87/Sr-86 secular variations in Neoproteozoic seawater have been used for the purpose of 'isotope stratigraphy' but there are a number of problems that can preclude its routine use.
Aharon P., Anthony E. Fallick, Anton B. Kuznetsov, Bowring S.A., Brand U., Brasier M.D., Brasier M.D., Brasier M.D., Burns S.J., Calver C.R., Corsetti F.A., Fairchild I.J., Fairchild I.J., Gao G., Gorokhov I.M., Gorokhov I.M., Gorokhov I.M., Grotzinger J.P., Grotzinger J.P., Hoffman P.F., Igor M. Gorokhov, Kaufman A.J., Kennedy M.J., Kirschvink J.L., Knoll A.H., Knoll A.H., Knoll A.H., Kupecz J.A., Kuznetsov A.B., Kuznetsov A.B., Lambert I.B., Magaritz M., McArthur J.M., McArthur J.M., McCulloch M.T., Melezhik V.A., Morton J.P., Ovchinnikova G.V., Pelechaty S.M., Podkovyrov V.N., Pokrovsky B.G., Pokrovsky B.G., Pokrovsky B.G., Saylor B.Z., Semikhatov M.A., Singh U., Smith L.H., Tronnes R.G., Tucker M.E., Tucker M.E., Veizer J., Veizer J., Victor A. Melezhik, Wada S.-I., Walter M.R., Wang Da-Rui   +55 more
core   +1 more source

Determining trophic niche width: a novel approach using stable isotope analysis [PDF]

, 2004
1. Although conceptually robust, it has proven difficult to find practical measures of niche width that are simple to obtain, yet provide an adequate descriptor of the ecological position of the population examined. 2.
Adams, C.E., Bearhop, S., Fuller, R.A., Macleod, H., Waldron, S.   +4 more
core   +1 more source

Locations of marine animals revealed by carbon isotopes [PDF]

, 2011
Knowing the distribution of marine animals is central to understanding climatic and other environmental influences on population ecology. This information has proven difficult to gain through capture-based methods biased by capture location. Here we show
Beaumont, William R.C., Ibbotson, Anton T., MacKenzie, Kirsteen M., Moore, Andy, Palmer, Martin R., Poulter, David J.S., Trueman, Clive N.   +6 more
core   +2 more sources

CARBON ISOTOPE FRACTIONATION AND DEPLETION IN TMC1 [PDF]

The Astrophysical Journal, 2012
Accepted for publication in The Astrophysical Journal (mail journal)
Harvey S. Liszt, Lucy M. Ziurys
openaire   +3 more sources