Sample records for depletion isotopic
from WorldWideScience.org

Sample records 1 - 17 shown.



3

Pliocene–Holocene evolution of depositional conditions in the eastern Mediterranean: Role of anoxia vs. productivity at time of sapropel deposition

Gallego-Torres, David; Martínez-Ruiz, Francisca; Paytan, Adina; Jimenez Espejo, Francisco J.; Ortega-Huertas, M.
2007-04-06

Digital.CSIC (Spain)

5
6

Origin of the island arc Moho transition zone via melt-rock reaction and its implications for intracrustal differentiation of island arcs: Evidence from the Jijal complex (Kohistan complex, northern Pakistan)

Garrido, C. J.; Bodinier, Jean-Louis; Dhuime, Bruno; Bosch, Delphine; Chanefo, Ingrid; Bruguier, Olivier; Hussain, Shaid S.; Dawood, Hamid; Burg, Jean-Pierre
2007-08-01

Digital.CSIC (Spain)

7

Multistage evolution of the Jijal ultramafic–mafic complex (Kohistan, N Pakistan): Implications for building the roots of island arcs

Dhuime, Bruno; Bosch, Delphine; Bodinier, Jean-Louis; Garrido, C. J.; Bruguier, Olivier; Hussain, Shaid S.; Dawood, Hamid
2007-09-15

Digital.CSIC (Spain)

10

Microbial Precipitation of Arsenic Sulfides in Andean Salt Flats

Demergasso, Cecilia S.; Chong D., Guillermo; Escudero G., Lorena; Pueyo Mur, Juan José; Pedrós-Alió, Carlos
2007-03-02

Digital.CSIC (Spain)

11

Mantle plumes: dynamics and geochemical signature

Cebriá, J. M.; López Ruiz, J.; Doblas, M.
2001-01-01

Digital.CSIC (Spain)

12
13

Geochemistry of Cretaceous Magmatism in Eastern Cuba: Recycling of North American Continental Sediments and Implications for Subduction Polarity in the Greater Antilles Paleo-arc

Marchesi, Claudio; Garrido, C. J.; Bosch, Delphine; Proenza, J. A.; Gervilla, Fernando; Monié, Patrick; Rodríguez-Vega, Antonio
2007-01-01

Digital.CSIC (Spain)

14

Expressions for the number of J=0 pairs in even-even Ti isotopes

Zamick, L.; Escuderos, Alberto; Lee, S. J.; Mekjian, A. Z.; Moya de Guerra, Elvira; Raduta, A. A.; Sarriguren, Pedro
2005-03-28

Digital.CSIC (Spain)

15

Estudio de flujos verticales de carbono y nitrógeno en ambientes acuáticos controlados en la bahía de Knebel, Dinamarca utilizando isótopos estables de nitrógeno y carbono (15N y 13C)/ A study of the vertical flow of carbon and nitrogen in controlled aquatic environments at the Knebel Bay, Denmark, with the use of the stable isotopes of nitrogen and carbon (15N y 13C)

DANERI, GIOVANNI
2001-09-01

Resumen en español En este estudio se utilizaron isótopos estables como trazadores para caracterizar y cuantificar el flujo vertical de carbono y nitrógeno. Los experimentos se llevaron a cabo en la bahía de Knebel, Dinamarca (56 08' N, 10 11' E), en dos ambientes acuáticos controlados tipo mesocosmos. La adición de nutrientes inorgánicos estimuló el afloramiento del flagelado no-tóxico Prorocentrum minimum, determinando un comportamiento similar en las mediciones de clorofila a (Cl (mas) o-a), nitrógeno orgánico particulado (NOP) y carbono orgánico particulado (COP) en ambos mesocosmos. Bajo condiciones no limitantes de nutrientes inorgánicos existió una baja discriminación isotópica resultando en bajos valores de delta13C en el COP en suspensión y sedimentado. El desfase entre los máximos de NOP, Clo-a y COP así como la rápida asimilación del nitrato adicionado en menos de tres días y una razón C/N variable indican que P. minimum posee una gran habilidad para asimilar nitrógeno inorgánico. La razón C/N alcanzó un mínimo al inicio del experimento, para luego aumentar una vez agotado el nitrato de la columna de agua. El nitrógeno nuevo sedimentado alcanzó un 10 a 11 % del total originalmente adicionado a la columna de agua en la forma de nitrato, sin que se observara una sedimentación masiva de P. minimum durante los días de duración de este experimento Resumen en inglés Stable isotopes were used as tracers to characterize and quantify the downward flux of carbon and nitrogen. The experiments were conducted in Knebel bay, Denmark (56 08' N, 10 11' E), in two controlled aquatic environments (mesocosm type). The addition of inorganic nutrients to the mesocosms stimulated a bloom of the non-toxic flagellate Prorocentrum minimum. A similar pattern in the concentration of chlorophyll a (Chl-a), particulate organic nitrogen (PON) and particulat (mas) e organic carbon (POC) was observed in both mesocosms. The elevated nutrient conditions resulted in low isotopic discrimination, this was reflected in low delta13C values of the suspended and sediment POC. The uncoupling between the peaks of PON, Chl-a and POC, as well as the rapid assimilation of the added nitrate (in less than three days) and a changing C/N ratio indicate that P. minimum has a great ability to assimilate inorganic nitrogen. The C/N ratio reached a minimum at the beginning of the experiment increasing later, once nitrate depletion was reached. The sedimentation of new nitrogen during this study was 10-11 % of the total originally added to the water column. No massive sedimentation of P. minimum was observed once the nitrate added to the mesocosms was utilized

Scientific Electronic Library Online (Spanish)

16

ECOSER Project: toward a better understanding of the mechanisms of carbon stabilization in agricultural soils amended with municipal organic wastes

Plaza de Carlos, César; Sanz, Rafael; Hernáiz, Pedro J.; García-Gil, Juan C.; Soler-Rovira, Pedro A.; Fernández, José M.; Hernández, Diana; Haller, Isabel; Polo, Alfredo
2009-01-01

Digital.CSIC (Spain)

17

Acid washing effect on elemental and isotopic composition of whole beach arthropods: implications for food web studies using stables isotopes

Serrano, Oscar; Serrano, Laura; Mateo, Miguel Ángel; Colombini, Isabella; Chelazzi, Lorenzo; Gagnarli, Elena; Fallaci, Mario
2008-06-03

Digital.CSIC (Spain)