Sample records for CICLO DEL CARBONO (carbon cycle)
from WorldWideScience.org

Sample records 1 - 20 shown. Select sample records:



1

Actividad biológica del suelo en dos bosques de Nothofagus del centro sur de Chile/ Biological activity of soils in two Nothofagus forest in south-central Chile

Rivas, Yessica; Godoy, Roberto; Valenzuela, Eduardo; Leiva, Javier; Oyarzún, Carlos; Alvear, Marysol
2007-06-01

Resumen en español Los bosques templados prístinos del sur de Chile tienen un bajo ingreso de nitrógeno (N) vía depositación atmosférica, por lo que la productividad del ecosistema depende principalmente del reciclaje interno de nutrientes, contenido en la materia orgánica del suelo (MOS). Se postula que existen diferencias en la actividad biológica del suelo entre un bosque secundario de Nothofagus obliqua de la Depresión Intermedia en Chile, influenciado por la actividad agrícola (mas) -ganadera y condiciones microclimáticas templadas favorables para la descomposición de la MOS, al comparar con un bosque prístino de Nothofagus betuloides de la Cordillera de los Andes, con microclima extremo. El presente estudio compara la tasa de mineralización de carbono (C-min), N (N-min) y las actividades enzimáticas del suelo (deshidrogenasas y fosfatasa ácida), entre ambos bosques templados y su correlación con la temperatura del suelo. Las mediciones bimensuales se realizaron durante un ciclo estacional. MANOVA mostró que las variables estudiadas fueron significativamente diferentes entre los bosques (Wilk's Lambda, F 4; 55 = 20,2, p = 0,000) y durante los meses a través del período de estudio (Wilk's Lambda, F 76; 148 = 118,9, p = 0,000), siendo los menores valores para el bosque de N. betuloides. El comportamiento de las variables de actividad biológica con la temperatura del suelo fue diferente entre ambos ecosistemas. Los menores valores observados en el bosque de N. betuloides, se deberían a: las condiciones rigurosas del clima de montaña, características cuali - cuantitativas de la hojarasca y su velocidad de descomposición, que pueden restringir la actividad de la biota y en especial, los microorganismos del suelo. Sin embargo, la temperatura del suelo, única variable microclimática considerada, no puede predecir ó explicar toda la variación de las actividades biológicas del suelo en los bosques estudiados Resumen en inglés Pristine temperate forests in southern Chile receive low inputs of nitrogen (N) via atmospheric deposition, so tree growth and microbiological activity depend primarily on the internal recycling of nutrients present in the soil organic matter (SOM). Differences are expected in the biological activity of the soil between a secondary forest of Nothofagus obliqua of the Intermediate Depression in Chile, influenced by the activity agricultural-livestock production and microcl (mas) imatic favorable conditions for the decomposition of the SOM, when comparing it with a pristine forest of Nothofagus betuloides of the Andes Mountain, with microclimate extreme. This study contrasts carbon mineralization (min-C) rates, nitrogen mineralization (min-N) rate and soil enzymatic activities (dehydrogenases and acid phosphatase) and the correlation between soil temperatures in both temperate forests. Measurements were carried out every two months during a seasonal cycle. MANOVA showed that levels of min-C, min-N, and enzymatic activities differed significantly between forests (Wilk's Lambda, F 4; 55 = 20.2, p = 0.000) values for the N. betuloides forest being significantly lower. There was also significant variation between months during the study period (Wilk's Lambda, F 76; 148 = 118.9, p = 0.000), the seasonal patterns of variation, with respect to soil temperature were different between the two ecosystems. The low values observed in the N. betuloides forest probably: reflect the rigorous climatic conditions, and low litter inputs dominated by species of low decomposability. However, soil temperatures were not a good predictor of temporal variation of mineralization or enzymatic activity

Scientific Electronic Library Online (Spanish)

2

PRODUCCIÓN PRIMARIA EN UN LAGO DE AGUAS CLARAS DE LA AMAZONÍA COLOMBIANA (LAGO BOA)/ Primary Production In A Clear Water Lake Of Colombian Amazon (Lake Boa)

PINILLA AGUDELO, GABRIEL ANTONIO
2009-08-01

Resumen en español Dentro de los aspectos funcionales de un sistema acuático uno de los más determinantes es la producción fitoplanctónica. En este trabajo se midió la producción primaria del fitoplancton (método del 14C) en un lago de aguas claras de la Amazonía colombiana, en diferentes momentos del ciclo hidrológico. La producción primaria osciló entre 0,6 y 2,3 g C m-2 d-1, valor este último medido durante la fase de aguas bajas. Estos resultados indican que la comunidad fit (mas) oplanctónica del lago Boa fluctúa desde condiciones de muy baja capacidad de asimilación de carbono inorgánico (aguas altas), hasta momentos en que este potencial se incrementa hasta cuatro veces (aguas bajas). Tales cambios drásticos obedecen a las fluctuaciones en la abundancia de microalgas, las que a su vez se presentan como respuesta a la variación trófica que tiene el lago durante el ciclo hidrológico. De esta manera, se pasa de condiciones oligotróficas en la época de inundación a un estado eutrófico cuando el sistema se desconecta del río en aguas bajas. Resumen en inglés Phytoplankton production is one of the most significant aspects in aquatic ecosystems. In this paper primary production of the phytoplankton community was measured (14C method) in a clear water lake in the Colombian Amazon region in different periods of the hydrological cycle. Primary production varied between 0.6 and 2.3 g C m-2 d-1, the last recorded at low water phase. Results show that the phytoplankton community of Lake Boa fluctuates from very low capacity of carbon (mas) assimilation during high water but increased four times during low water. The strong change in productivity follows the variation in algal abundance, which in turn reflects changes in water quality conditions during the hydrologic cycle. Thus, the lake passes from oligotrophic conditions during the flooding period to eutrophic conditions when the lake is disconnected from the river at low water phase.

Scientific Electronic Library Online (Spanish)

3

Actividad biológica y agregados estables al agua en dos tipos de formaciones vegetales de un bosque templado del Centro-Sur de Chile con perturbación antrópica/ Biological activities and water-stable aggregates in two forest types of temperate forest of Central-Southern of Chile with antropic disturbed

Alvear, Marysol; Reyes, Francisco; Morales, Alfredo; Arriagada, César; Reyes, Mauricio
2007-06-01

Resumen en español La demanda creciente de productos maderables y no maderables, provenientes de bosques naturales, ha aumentado la tasa de degradación de estos sistemas. Este proceso resulta en la necesidad de conocer cuáles son las variables dinámicas que intervienen en su regulación. En este trabajo determinamos algunos parámetros biológicos del suelo, tales como la hidrólisis de la fluoresceína diacetato (FDA); carbono, nitrógeno y ergosterol de la biomasa microbiana y la activ (mas) idad de algunas enzimas involucradas en el ciclo del carbono (C) (β-glucosidasa y manganeso peroxidasa), en el ciclo del nitrógeno (N) (ureasa) y en el ciclo del fósforo (fosfatasa ácida). Estudiamos un suelo rizosférico con características de Andisol en dos tipos de bosque (bosque secundario de Nothofagus obliqua y bosque maduro de Aextoxicon punctatum). Determinamos, además, el porcentaje de agregados estables al agua. Todos los parámetros estudiados resultaron significativamente mayores en el bosque secundario que en el bosque maduro. Nuestros resultados sugieren que la mayor acumulación de materia orgánica en el sitio dominado por las especies caducifolias, principalmente Nothofagus obliqua, se traduce en condiciones más favorables para la actividad de los microorganismos, principalmente de la biomasa fúngica, asociadas a una mayor humedad del suelo. Resumen en inglés The increasing demand of timber-yielding and not timber-yielding products, from natural forests has increased the rate of degradation. This process makes necessary the understanding of the variables responsible for its regulation. We quantified and compared a number of biological and physical parameters in rhizospheric soil (Andisol) under two forest types (secondary and mature forest). The biological variables evaluated were the fluorescein diacetate hydrolysis (FDA), mi (mas) crobial biomass carbon and nitrogen, ergosterol and the activity of two enzymes involved in the carbon cycle (C) (β-glucosidase and managanese peroxidase), one involved in the nitrogen cycle (N) (urease) and one involved in the phosphorus cycle (P) (acid phosphatase). Additionally we quantified the percentage of water stable aggregates. The entire set of parameters exhibited greater values in secondary forest than those of the mature one. Our results suggest that the greater soil moisture, litter and organic matter accumulation in the secondary forest are responsible for the greater biological activity documented in this system.

Scientific Electronic Library Online (Spanish)

4

Estimación de la APAR y la NPP mediante sensoramiento remoto en tres sectores de la Pampa Húmeda, Argentina/ Estimation of APAR and NPP through remote sensing in three sectors of the Humid Pampa (Argentina)

Di Leo, Néstor C.; Montico, Sergio; Bonel, Beatriz A.; Denoia, Julio A.
2007-11-01

Resumen en español La radiación fotosintéticamente activa (PAR) es importante como variable de entrada de energía en diversos procesos biológicos y su evaluación temporal tiene particular interés en el monitoreo de cultivos. Los datos de reflectancia espectral, obtenidos mediante sensores remotos, son adecuados para proporcionar observaciones de fenómenos que se relacionan con aspectos ecofisiológicos de las cubiertas vegetales, incluyendo a la productividad primaria neta (NPP). És (mas) ta constituye una de las pocas fuentes de información acerca de los procesos del ciclo del carbono en escalas regionales o globales. La NPP se relaciona con la eficiencia del uso de la luz a través de la radiación fotosintéticamente activa absorbida (APAR) y representa un indicador agroecológico de utilidad para valorar la utilización productiva del territorio. El objetivo de este trabajo es presentar un aporte metodológico a la agroecología, mediante las caracterizaciones de la NPP y la APAR, en tres situaciones geográficas y productivas de la Pampa Húmeda, Argentina. Resumen en inglés The photosynthetically active radiation (PAR) is important as energy input in diverse biological processes and its temporal evaluation has particular interest in crops monitoring. The data of spectral reflectance, obtained through remote sensors, are useful to provide observations of phenomena that are related to ecophysiological aspects of vegetal covers, including the net primary productivity (NPP). This one constitutes one of the few sources of information about the pr (mas) ocesses of the cycle of carbon in regional or global scales. The NPP is related to the efficiency of the use of light through the absorbed photosynthetically active radiation (APAR) and represents a useful agroecology indicator to value the productive use of the territory. The objective of this work is to present a methodological contribution to the agroecology through the characterization of the NPP and the APAR, in three geographic and productive situations in the Humid Pampa, Argentina.

Scientific Electronic Library Online (Spanish)

5

Mineralización de la Paja de Caña de Azúcar en Suelo Adicionado con Viñaza (Suproducto de la Industria del Alcohol de Caña de Azúcar) y Fertilizante Nitrogenado/ Mineralization of Sugar-Cane Straw in Soil Amended with Vinasse (a Sugar-Cane Alcohol Industry Byproduct) and Nitrogen Fertilizer

Terumi Sanomiya, Luciana; Carlos Assis, Luis; Ademir de Oliveira, João; Nahas, Ely
2006-03-01

Resumen en español La celulosa es el compuesto orgánico vegetal más abundante, derivándose principalmente de los residuos de la planta. La descomposición de la paja de caña de azúcar (Saccharum officinarum L.) fue estudiada en un período de hasta 90 días a través de variables relacionadas con el ciclo del carbono, como la actividad respiratoria y las actividades de la CM-celulasa (CM, celulosa microcristalina) y de la CMC-celulasa (CMC, carboximetilcelulosa). Los tratamientos consi (mas) stieron en la adición de 0; 0,5 y 1,0% de paja, en la presencia y ausencia de viñaza (residuo de las destilerías de producción de alcohol de caña de azúcar) y fertilizante nitrogenado. Las actividades respiratoria y de las celulasas aumentaron hasta el día 14 de incubación y después disminuyeron. La actividad respiratoria fue 1,9 y 2,3 veces mayor (P Resumen en inglés Cellulose is the most abundant vegetable organic compound, being derived mainly from plant residues. The decomposition of sugar-cane (Saccharum officinarum L.) straw was studied in a period up to 90 days, through variables related to the carbon cycle, such as respiratory activity and CM-cellulase (CM, cellulose microcrystalline) and CMC-cellulase (CMC, carboxymethylcellulose) activities. The treatments consisted of 0, 0.5 and 1.0% of straw, in the presence and absence of (mas) vinasse (a sugar-cane alcohol industry byproduct) and nitrogen fertilizer. The respiratory and cellulase activities increased up to the 14th day of incubation and later decreased. The respiratory activity was 1.9 and 2.3 fold larger (P

Scientific Electronic Library Online (Spanish)

6

Very high-resolution seismo-acoustic imaging of seagrass meadows (Mediterranean Sea): Implications for carbon sink estimates

Lo Iacono, Claudio; Mateo, Miguel Angel; Gràcia i Mont, Eulàlia; Guasch, Lluis; Carbonell, Ramón; Serrano, Laura; Serrano, Oscar; Dañobeitia, Juan José
2008-09-01

Digital.CSIC (Spain)

7

Vertical biogenic particle flux in a western Galician ria (NW Iberian Peninsula)

Varela, Manuel; Prego Reboredo, Ricardo Francisco J.; Pazos, Yolanda
2004-03-25

Digital.CSIC (Spain)

8

VARIACIONES NICTEMERALES DE ALGUNAS VARIABLES CLIMÁTICAS, FÍSICAS Y QUÍMICAS EN UNA LAGUNA SOMERA EN GUATAPÉ (ANTIOQUIA), COLOMBIA/ NICTEMERAL VARIATION OF SOME CLIMATIC, PHYSICAL AND CHEMICAL VARIABLES ON SMALL LAKE IN GUATAPÉ (ANTIOQUIA), COLOMBIA

Montoya-M, Yimmy
2008-01-01

Resumen en español Se evaluó la variación nictemeral de algunas variables climáticas, físicas y químicas durante dos días de muestreos separados por seis meses en dos épocas hidrológicas diferentes en una laguna tropical en el municipio de Guatapé (Antioquia), Colombia, con el fin de verificar que el trópico la magnitud de la variabilidad en el ciclo día-noche es mayor que la temporal. A nivel mensual, la pluviosidad presentó la mayor variación (C. V. = 56,9%) seguida por la te (mas) mperatura del aire (C. V. = 19,7%) lo cual es común para las zonas tropicales. A través del ciclo día-noche, la mayoría de las variables estudiadas presentaron diferencias significativas excepto el pH, el cual mantuvo una muy baja variación durante todo el tiempo de estudio (C. V. Resumen en inglés At a tropical lagoon in the municipality of Guatapé (Antioquia), Colombia was studied the nictemeral variation of several climatic, physical, and chemical variables evaluated during two days of separate samplings through six months in two different hydrologic periods in order to verify that the tropic the magnitude of the variability day-night cycle is greater than the temporary. At seasonal level, the pluviosity presented the highest variation (C. V. = 56.9%) followed b (mas) y the air temperature (C. V. = 19.7%) which is common in the tropical areas. Through the day-night cycle the most of the studied variables presented significant differences except the pH, which maintained a very low variation during the whole time of study (C. V.

Scientific Electronic Library Online (Spanish)

11

Transparent Exopolymer Particles (TEP) link phytoplankton and bacterial production in the Gulf of Aqaba

Bar-Zeev, Edo; Berman-Frank, Ilana; Stambler, Noga; Vázquez-Domínguez, Evaristo; Zohary, Tamar; Capuzzo, Elisa; Meeder, Efrat; Suggett, David J.; Iluz, David; Dishon, Gal; Berman, Tom
2009-01-01

Digital.CSIC (Spain)

12

Toxicity of cadmium to soil microbial activity: effect of sewage sludge addition to soil on the ecological dose

Moreno, J. L.; Hernández Fernández Muñoz, María Teresa; Pérez-Espinosa, A.; García Izquierdo, Carlos
2002-09-01

Digital.CSIC (Spain)

13

Towards a better understanding of microbial carbon flux in the sea

Gasol, Josep M.; Pinhassi, Jarone; Alonso-Sáez, Laura; Ducklow, Hugh; Herndl, Gerhard J.; Koblízek, Michal; Labrenz, Matthias; Luo, Yawei; Morán, Xosé Anxelu G.; Reinthaler, Thomas; Simon, Meinhard
2008-01-01

Digital.CSIC (Spain)

14

Tin–carbon composites as anodic material in Li-ion batteries obtained by copyrolysis of petroleum vacuum residue and SnO2

Tirado, J. L.; Santamaría Ramírez, Ricardo; Ortiz, G. F.; Menéndez López, Rosa M.ª; Lavela, P.; Jiménez-Mateos, J. M.; Gómez García, F. J.; Concheso Álvarez, Alejandro; Alcántara, R.
2007-04-02

Digital.CSIC (Spain)

16

The carbon budget of the Spanish forests

Rodríguez Murillo, Juan Carlos
1994-01-01

Digital.CSIC (Spain)

17

The adsorption of chromium (VI) from industrial wastewater by acid and base-activated lignocellulosic residues

Álvarez Rodríguez, Patricia; Blanco Rodríguez, Clara; Granda Ferreira, Marcos
2007-06-01

Digital.CSIC (Spain)

18

The Role of Hyperspectral data in understanding the Global Carbon Cycle

Ustin, S. L. ; Zarco-Tejada, Pablo J. ; Asner, G.

Presented at the 2001 AVIRIS Workshop, JPL-NASA, Pasadena, California, Feb. 27th - March 2nd, 2001 | A major challenge in predicting the consequences of global climate change is to accurately estimate carbonstocks and to predict future CO2 sequestration and dynamics (NRC, 1999). Climate dynamics an...

DRIVER (Spanish)

19

The Role of Hyperspectral data in understanding the Global Carbon Cycle

Ustin, S. L.; Zarco-Tejada, Pablo J.; Asner, G.
2001-01-01

Digital.CSIC (Spain)

20

The Large Electrochemical Capacitance of Microporous Doped Carbon Obtained by Using a Zeolite Template

Ovín Ania, M.ª Concepción; Khomenko, Volodymyr; Raymundo-Piñero, Encarnación; Parra Soto, José Bernardo; Béguin, François
2007-06-18

Digital.CSIC (Spain)

22

Sulfation of CaO Particles in a Carbonation/Calcination Loop to Capture CO2

Grasa, Gemma S.; Alonso Carreño, Mónica; Abanades García, Juan Carlos
2008-01-30

Digital.CSIC (Spain)

23

Sugars and Circadian Regulation Make Major Contributions to the Global Regulation of Diurnal Gene Expression in Arabidopsis

Bläsing, Oliver E.; Gibon, Yves; Günther, Manuela; Höhne, Melanie; Morcuende, R.; Osuna, Daniel; Thimm, Oliver; Scheible, Wolf-Rüdiger; Stitt, Mark
2005-12-01

Digital.CSIC (Spain)

24

Sorbent attrition in a carbonation/calcination pilot plant for capturing CO2 from flue gases

González García, Belén; Alonso Carreño, Mónica; Abanades García, Juan Carlos
2010-10-01

Digital.CSIC (Spain)

25

Sorbent Cost and Performance in CO2 Capture Systems

Abanades García, Juan Carlos; Rubin, Edward S.; Anthony, Edward J.
2004-05-26

Digital.CSIC (Spain)

26

Soil microbial activity after restoration of a semiarid soil by organic amendments

Ros Muñoz, Margarita Matilde; Hernández Fernández Muñoz, María Teresa; García Izquierdo, Carlos
2003-03-01

Digital.CSIC (Spain)

27

Short-Term Effects of Human Trampling on Vegetation and Soil Microbial Activity

Ros Muñoz, Margarita Matilde; García Izquierdo, Carlos; Hernández Fernández Muñoz, María Teresa; Andrés, M.; Cerro-Barja, A. del
2004-01-01

Digital.CSIC (Spain)

28

Sandstone petrofacies in the northwestern sector of the Iberian Basin

Arribas, J.; Ochoa, M.; Mas, R.; Arribas, Mª E.; González-Acebrón, L.
2007-01-01

Digital.CSIC (Spain)

30

Remote Sensing in BOREAS: Lessons learned

Gamon, J. A. ; Huemmrich, K. F. ; Peddle, D. R. ; Chen, J. ; Fuentes, D. ; Hall, F. G. ; Kimball, J. S. ; Goetz, S.

The Boreal Ecosystem Atmosphere Study (BOREAS) was a large, multiyear internationally supported study designed to improve ourunderstanding of the boreal forest biome and its interactions with the atmosphere, biosphere, and the carbon cycle in the face of globalclimate change. In the initial phase ...

DRIVER (Spanish)

31

Remote Sensing in BOREAS: Lessons learned

Gamon, J. A.; Huemmrich, K. F.; Peddle, D. R.; Chen, J.; Fuentes, D.; Hall, F. G.; Kimball, J. S.; Goetz, S.; Gu, J.; McDonald, K. C.; Miller, J. R.; Moghaddam, M.; Rahman, A. F.; Roujean, J. L.; Smith, E. A.; Walthall, C. L.; Zarco-Tejada, Pablo J.; Hu, B.; Fernandes, R.; Cihlar, J.
2004-01-01

Digital.CSIC (Spain)

32

Regional air-sea fluxes of anthropogenic carbon inferred with an Ensemble Kalman Filter

Gerber, M.; Joos, F.; Vázquez Rodríguez, Marcos; Touratier, F.; Goyet, C.
2009-03-01

Digital.CSIC (Spain)

33

Reactivity of highly cycled particles of CaO in a carbonation/calcination loop

Grasa, Gemma S.; Abanades García, Juan Carlos; Alonso Carreño, Mónica; González García, Belén
2008-04-15

Digital.CSIC (Spain)

34

Reacción de veinte clones de caña de azúcar a la enfermedad del carbón Ustilago scitaminea Sydow/ Reaction of twenty sugarcane clones to smut disease Ustilago scitaminea Sydow

Briceño, R; de Sousa Vieira, O; Rea, R
2005-10-01

Resumen en español Con el fin de determinar el comportamiento de veinte clones (17 experimentales y 3 testigos comerciales) de caña de azúcar (Saccharum spp., híbrido) a la enfermedad del carbón (Ustilago scitaminea Sydow) se llevó a cabo un experimento utilizando el método de inoculación artificial por inmersión de esquejes de una yema en una suspensión de esporas, durante 20 min. Se inocularon 60 yemas por cultivar, luego se sembraron en macetas; al mes fueron transplantadas a ca (mas) mpo bajo un diseño de bloques al azar con tres repeticiones. La evaluación de esta prueba se hizo quincenalmente y por dos ciclos del cultivo (planta y soca). La determinación de la reacción a la enfermedad sustentada en el porcentaje de infección de cepas se hizo de acuerdo a una escala establecida, utilizada en el programa de obtención y selección de variedades de caña de azúcar del Instituto Nacional de Investigaciones Agrícolas (INIA). Durante los dos ciclos se encontraron 10 variedades con reacción de moderadamente resistentes a resistentes y diez de susceptibles a altamente susceptibles. Los materiales V91-4, V91-7, V91-11 y V91-14, fueron eliminados del programa debido a su alta susceptibilidad a esta enfermedad. Los clones V91-8, V91-9, V91-13 y V98-76, resultaron susceptibles y se recomienda observarlos en otro ciclo para dar las recomendaciones pertinentes. Por su parte los materiales: V91-1, V91-2, V91-3, V91-5, V91-6, V91-10, V91-12, V91-13, V91-15 y V91-16 mostraron ser resistentes a moderadamente resistentes. Resumen en inglés An experiment was established to determine the performance of 20sugarcane (Saccharum spp., hybrid) clones (17 experimental and 3 commercial checks) to Smut disease (Ustilago scitaminea, Sydow). An artificial inoculation method was used by immersing 1-bud cuttings in a suspension of spores for 20 min. Sixty buds per cultivar were inoculated then planted in pots. After a month, sugarcane plants were transplanted into the field using a randomized complete block design with t (mas) hree replications. The evaluations were made every two weeks during plant crop and ratoon cycles. The percentage of stool infection was measured to determine the sugarcane reaction to the disease, according to a scale established by the Sugarcane Breeding Program at `Instituto Nacional de Investigaciones Agrícolas (INIA).' During both cycles, ten varieties reacted from moderately resistance to resistance, and the other ten ranged from susceptible to highly susceptible. The V91-4, V91-7, V91-11 and V91-14 varieties were eliminated from the program due to their extremely susceptibility to this disease. The V91-8, V91-9, V91-13 and V98-76 clones resulted susceptible, however, it is recommended to evaluate them for another cycle to give the pertinent recommendations. On the other hand, V91-1, V91-2, V91-3, V91-5, V91-6, V91-10, V91-12, V91-13, V91-15 and V91-16 showed moderately resistance to resistance.

Scientific Electronic Library Online (Spanish)

36

Pseudo-cryptic speciation in coccolithophores

Sáez, Alberto G.; Probert, Ian; Geisen, Markus; Quinn, Patrick; Young, J. R.; Medlin, L. K.
2003-05-20

Digital.CSIC (Spain)

37

Progress on the development of an integrated canopy fluorescence model

Miller, J. R.; Berger, M.; Alonso, L.; Cerovic, Z.; Goulas, Y.; Jacquemoud, S.; Louis, J.; Mohammed, G. H.; Moya, I.; Pedrós, R.; Moreno, J.; Verhoef, W.; Zarco-Tejada, Pablo J.
2004-01-01

Digital.CSIC (Spain)

38

Precipitation of barite by Myxococcus xanthus: possible implications for the biogeochemical cycle of barium.

González-Muñoz, María Teresa; Fernández-Luque, Belén; Martínez-Ruiz, Francisca; Ben Chekroun, Kaoutar; Arias, José María; Rodríguez-Gallego, Manuel; Martínez-Cañamero, Magdalena; Linares, Concepción de; Paytan, Adina
2003-09-01

Digital.CSIC (Spain)

40

Oxyfuel carbonation/calcination cycle for low cost CO2 capture in existing power plants

Romeo, Luis M.; Abanades García, Juan Carlos; Escosa, Jesús M.; Paño, Jara; Giménez, Antonio; Sánchez-Biezma, Andrés; Ballesteros, Juan Carlos
2008-05-12

Digital.CSIC (Spain)

43

Ocean warming enhances respiration and carbon demand of coastal microbial plankton

Vázquez-Domínguez, Evaristo; Vaqué, Dolors; Gasol, Josep M.
2007-05-07

Digital.CSIC (Spain)

44

Nutrient mineralization rates and ratios in the eastern South Atlantic

Brea, S.; Álvarez-Salgado, Xosé Antón; Álvarez, Marta; Pérez, Fiz F.; Mémery, L.; Mercier, Herlé; Messias, M. J.
2004-05-01

Digital.CSIC (Spain)

46

Nitrogen in aramid-based activated carbon fibers by TPD, XPS and XANES

Boudou, J. P.; Parent, Ph.; Suárez García, Fabián; Villar Rodil, Silvia; Martínez Alonso, Amelia; Díez Tascón, Juan Manuel
2006-06-21

Digital.CSIC (Spain)

47
48

New metabolites in the degradation of fluorene by Arthrobacter sp. strain F101

Casellas, Mercè; Grifoll, Magdalena; Bayona Termens, Josep María; Solanas, Anna M.
1997-03-01

Digital.CSIC (Spain)

49

Nanocomposite hybrid molecular materials for application in solid-state electrochemical supercapacitors

Cuentas Gallegos, A. K.; Lira-Cantú, Monica; Casañ Pastor, Nieves; Gómez-Romero, P.
2005-01-01

Digital.CSIC (Spain)

50

Molecular Abundances in CRL 618

Pardo Carrión, Juan Ramón; Cernicharo, José
2007-01-10

Digital.CSIC (Spain)

51

Modeling of the Deactivation of CaO in a Carbonate Loop at High Temperatures of Calcination

González García, Belén; Grasa, Gemma S.; Alonso Carreño, Mónica; Abanades García, Juan Carlos
2008-11-03

Digital.CSIC (Spain)

52

Millennial-scale variability in the productivity signal from the Alboran Sea record, Western Mediterranean Sea

Moreno, Ana; Cacho, Isabel; Canals, Miquel; Grimalt, Joan O.; Sánchez-Vidal, Anna
2004-07-10

Digital.CSIC (Spain)

53

Microwave-assisted regeneration of activated carbons loaded with pharmaceuticals

Ovín Ania, M.ª Concepción; Parra Soto, José Bernardo; Menéndez Díaz, José Ángel; Pis Martínez, José Juan
2007-05-22

Digital.CSIC (Spain)

54

Microbiological activity in a soil 15 years after its devegetation

Bastida, F.; Moreno, J. L.; Hernández Fernández Muñoz, María Teresa; García Izquierdo, Carlos
2006-08-01

Digital.CSIC (Spain)

55

Microbial oceanography of the dark ocean's pelagic realm

Arístegui, Javier; Gasol, Josep M.; Duarte, Carlos M.; Herndl, Gerhard J.
2009-04-16

Digital.CSIC (Spain)

56

Microbial mats on the Orkney Islands revisited: microenvironment and microbial community composition

Wieland, Andrea; Kühl, Michael; McGowan, L.; Fourçans, Aude; Duran, Robert; Caumette, P.; García de Oteyza, Tirso; Grimalt, Joan O.; Solé, Antoni; Esteve, Isabel; Herbert, R. A.
2003-08-14

Digital.CSIC (Spain)

57

Macromolecular polyradicals with cyclic triphosphazene as a core. Spectral and electrochemical properties

Carriedo, Gabino A.; García Alonso, Francisco J.; Gómez Elipe, P.; Brillas, Enric; Labarta, Amílcar; Juliá, Lluís
2004-01-09

Digital.CSIC (Spain)

58

Low cost coal-based carbons for combined SO2 and NO removal from exhaust gas

Izquierdo Pantoja, María Teresa; Rubio Villa, Begoña; Mayoral Gastón, María del Carmen; Andrés Gimeno, José Manuel
2003-09-04

Digital.CSIC (Spain)

60

Lime enhanced gasification of solid fuels: Examination of a process for simultaneous hydrogen production and CO2 capture

Weimer, Thomas; Berger, Roland; Hawthorne, Craig; Abanades García, Juan Carlos
2008-07-01

Digital.CSIC (Spain)

61

Land use in relation to soil chemical and biochemical properties in a semiarid Mediterranean environment

Caravaca Ballester, María Fuensanta; Masciandaro, Grazia; Ceccanti, Brunello
2002-10-01

Digital.CSIC (Spain)

62

Is the availability of different nutrients a critical factor for the impact of bacteria on subterraneous carbon budgets?

Portillo Guisado, María del Carmen; Porca, E.; Cuezva, S.; Cañaveras, J. C.; Sánchez-Moral, S.; González Grau, Juan Miguel
2009-09-01

Digital.CSIC (Spain)

63

Influence of soot carbon on the soil-air partitioning of polycyclic aromatic hydrocarbons

Ribes, Sandra; Van Drooge, Barend L.; Dachs, Jordi; Gustafsson, Ørjan; Grimalt, Joan O.
2003-05-10

Digital.CSIC (Spain)

65

Genome analysis of the proteorhodopsin-containing marine bacterium Polaribacter sp. MED152 (Flavobacteria)

González, José M.; Fernández-Gómez, Beatriz; Fernàndez-Guerra, Antoni; Gómez-Consarnau, Laura; Sánchez, Olga; Coll-Lladó, Montserrat; Campo, Javier del; Escudero, Lorena; Rodríguez-Martínez, Raquel; Alonso-Sáez, Laura; Latasa, Mikel; Paulsen, Ian; Nedashkovskaya, Olga; Lekunberri, Itziar; Pinhassi, Jarone; Pedrós-Alió, Carlos
2008-06-13

Digital.CSIC (Spain)

66

GASIFICACIÓN DE CARBÓN PARA GENERACIÓN DE ENERGÍA ELÉCTRICA: ANÁLISIS CON VALORACIÓN DE OPCIONES REALES/ COAL GASIFICATION FOR POWER GENERATION: ANALYSIS WITH REAL OPTIONS VALUATION

Concha A, Alejandro; Andalaft Ch, Alejandro; Farías F, Oscar
2009-12-01

Resumen en español Se evalúa económicamente la utilización de la tecnología de gasificación de carbón en la generación de energía eléctrica, utilizando información secundaria y el enfoque de valoración de opciones reales mediante árboles binomiales de 2 variables. Se analiza el caso de adaptar una central existente de gas natural de ciclo combinado (NGCC) para la utilización de syngas a partir de carbón; en un segundo caso, se evalúa la instalación de una nueva central termo (mas) eléctrica de carbón pulverizado (PC) o alternativamente una central de gasificación de carbón integrada a ciclo combinado (IGCC). En este último caso, se evalúa la opción de "switching" de combustible. Para los precios de los combustibles se emplean modelos de Movimiento Browniano Geométrico No Homogéneo (IGBM) y en ambos casos estudiados se analiza en 2 escenarios de precios, incluyendo análisis de sensibilidad. Respecto al primer caso, la adaptación a syngas de una planta NGCC es conveniente económicamente, teniendo el proyecto una alta sensibilidad respecto a la eficiencia. La sensibilidad a la inversión no es significativa, como tampoco a los gastos de operación. Respecto al segundo caso, la conveniencia económica de la planta IGCC frente a la planta PC no es clara en los escenarios de precios considerados. Pero analizada en diversas combinaciones de precios, la planta IGCC de operación flexible alternando dos combustibles puede lograr ventajas económicas. Respecto a la sensibilidad, se repiten las conclusiones mencionadas para el primer caso Resumen en inglés The use of coal gasification technology in the generation of electric power is evaluated economically. Secondary information and valuation of real options approach is used, with two variables binomial lattices. First, the retrofit of an existing natural gas combined cycle plant (NGCC) for the utilization of syngas from coal is analyzed; on the second case, an economical evaluation is realized for to compare a new Pulverized Coal plant (PC) and, alternatively, an Integrate (mas) d Gasification to Combined Cycle plant (IGCC). In this last case, the fuel switching option of the IGCC plant is analyzed. For the fuel prices, Inhomogeneous Geometric Brownian Movement processes are used. In both cases, two prices scenarios are considered with sensitivity analysis. Regarding the first case, adaptation to syngas in a NGCC plant is economically desirable, having the project a high sensitivity to efficiency. The sensitivity about investment is not significant, nor to the operating expenses. Concerning the second case, the economic convenience of the IGCC plant in front of the PC plant is not clear in the price scenarios considered. But analyzed in various combinations of prices, flexible operating IGCC plant alternating two fuels can achieve economic advantages. With regard to the sensitivity, conclusions mentioned in the first case are similars for the second case

Scientific Electronic Library Online (Spanish)

68

Fermented wheat germ extract inhibits glycolysis/pentose cycle enzymes and induces apoptosis through poly(ADP-ribose) polymerase activation in Jurkat T-cell leukemia tumor cells

Comín Anduix, Begoña; Boros, László G.; Marin, Silvia; Boren, Joan; Callol Massot, Carles; Centelles, Josep J.; Torres, Josep Lluis; Agell, Neus; Bassilian, Sara; Cascante, Marta
2002-09-25

Digital.CSIC (Spain)

69

Factors controlling the year-round variability in carbon flux through bacteria in a coastal marine system

Alonso-Sáez, Laura; Vázquez-Domínguez, Evaristo; Cardelús, Clara; Pinhassi, Jarone; Sala, M. Montserrat; Lekunberri, Itziar; Balagué, Vanessa; Vila-Costa, Maria; Unrein, Fernando; Massana, Ramon; Simó, Rafel; Gasol, Josep M.
2008-02-26

Digital.CSIC (Spain)

72

Estructuras de deformación (¿sismitas?) en la Formación Río Negro, provincia de Río Negro, Argentina

Schillizzi, Roberto; Luna, Liliana; Falco, Juan Ignacio
2010-07-01

Resumen en español A Las estructuras de deformación (ED) en sedimentos blandos comprenden las alteraciones que se producen casi simultáneamente con la sedimentación. Estos procesos se hallan en relación directa con las características internas de los materiales sedimentarios y de los factores externos que actúan sobre ellos. Sus resultados incluyen deformaciones como inyecciones, fracturas, volcanes y laminaciones convolutas que afectan total o parcialmente la estratificación. Los se (mas) dimentos blandos deformados por sismos se incluyen bajo la denominación general de sismitas (seismites). Como objetivo de esta investigación se plantea reconocer, por primera vez, estructuras de deformación ubicadas en la Formación Río Negro presentes en el sector norte del Golfo San Matías, en inmediaciones del Faro Río Negro. La metodología empleada consistió en el reconocimiento y descripción de las estructuras, para lo cual se extrajeron muestras para determinar granulometría, mineralogía y contenido de materia orgánica. Se fotografiaron los distintos sectores con deformaciones con el fin de establecer modelos comparativos. El sector estudiado, de 4 km de extensión, se ubica entre el faro de Río Negro y el inicio del Banco Verde y morfológicamente corresponde a un frente acantilado con orientación ENE-OSO. En él se determinaron las siguientes ED: a- de carga simple, pseudonódulos contiguos y aislados, y estructuras complejas; b- de escape de fluidos y c- estructuras de deslizamiento basal y por presión dirigida. El origen de las deformaciones se debe a las características de las sedimentitas y a los procesos que las afectan tales como los efectos por carga, escapes de fluidos y las presiones dirigidas. Como origen de estos procesos se señalan: la presión de la columna litológica, las olas de tormentas y los terremotos. Por los rasgos hallados las deformaciones del litoral rionegrino tendrían un origen sísmico, proceso ocurrido en un único evento durante el ciclo Andino cuyos inicios se fijan hace aproximadamente 45 Ma. Por otra parte sus techos y bases no se hallan asociados a otros procesos de deformación y sus espesores no exceden el metro de potencia. Además se hallan acotadas a la zona de transición entre los miembros medio y superior de la Formación Río Negro descansando en algunos casos sobre arcilitas y en otros sobre limolitas, originadas en un paleorelieve de interdunas. Resumen en inglés Soft-sediment deformation structures (SSD) are alterations produced almost simultaneously with sedimentation. They are directly related to internal characteristics of sedimentary materials as well as to external factors acting on them. Results derived from such alterations are evidenced as injections, fractures, volcanoes and convolute laminations, among other forms, affecting stratification either totally or partially. Soft-sediment deformation structures resulting from (mas) seisms are known as seismites. The present study aims at determining for the first time the presence of SSD structures in the Río Negro Formation, located in the northern area of San Matías Gulf, near Río Negro Lighthouse, Argentina (Fig. 1). To this end, structures were firstly identified and further described. Samples were subsequently collected for the determination of grain-size, mineralogy and organic matter content. Photographs of the different sectors evidencing deformations were taken in order to determine further comparative models. Morphology in the study area is associated to cliffs with vertical, fractured fronts and with an average height of 70 m in whose base torn-down blocks are accumulated. The geological structure of the study area is related to the Cuenca del Colorado and the Comarca Nordpatagónica, whose basement is mainly composed of Paleozoic and Mesozoic crystalline rocks. The sedimentary tertiary cover from the Miocene-Pliocene is represented by light-blue sandstones of the Río Negro Formation (Andreis, 1965). This unit was formed in an aeolian environment with intercalations of clay-silt shallow lagoons and a marine episode located in the mid area of the Río Negro Formation. At the top of the Río Negro Formation there are Pleistocene-Holocene sedimentites having a thickness of up to 5 m. Within the local structural framework of our study area there are fractures with a NE-SW and a NW-SE direction, which are related with fractures N55º, N90º and N350º azimuth located in the abrasion platform. According to Dzulinsky and Walton (1965), Lowe (1975), Brencley and Newall (1977), Clauss (1993), van Loon (2002), Owen (2003), Neuwerth et al. (2006), Alfaro et al. (2006), Montenat et al. (2007), among others (Table 1), and, taking into account the geometry of deformations, laboratory reconstructions and field observations from our study area, it can be concluded that the classifications of SSD structures tend to establish morphologic and genetic systematizations. The following characteristics were identified in our study area: limited deformations among stratigraphic horizons; a lateral continuity of SSD structures at considerable distances; and a confinement between non-deformed strata and its lithological association with psamitic-pelitic sediments. The study area, which is 4 km long and is located between Río Negro Lighthouse and the beginning of Banco Verde, is from the morphological point of view, a cliffed front with an ENE-WSW orientation. Different types of SSD structures were identified in this area. For example, from the morphological point of view and according to the loading mechanisms observed, simple-load structures (Fig. 2), attached and detached pseudonodules (Figs. 3, 4 and 5) and complex structures (Fig. 6) were identified. Furthermore, from the genetic point of view and according to the intrusion processes observed in soft sediments, water-scape structures (Fig. 7) and plate- or fountain-like deformations (Fig. 8) were found. From the genetic point of view, and based on the collapse and pressure mechanisms observed, basal slumping (Fig. 9) and directed-pressure structures (Fig. 11) were also found. The above-mentioned SSD structures were analyzed and interpreted following Strachan´s model (2002) (Fig. 10) and Laird´s model (1968) (Fig. 12). The origin of SSD structures depends on the characteristics of sedimentites and on the mechanisms that produce them. In the study area, the materials susceptible to deformation come from an interdune environment that is characterized by granulometric variations derived from the fluctuating and restrictive climatic conditions (Cojan and Thiry, 1992) that typify the Río Negro Formation. Fine-grained materials having low cohesion and poor sorting such as the sediments of deformed strata (Fig. 13) produced SSD structures as a result of high pore pressure and liquefaction effects (Tsuchida and Hayashi, 1971; Obermeier, 1996). Grain packing with a porous value as that allows intercommunication among grains and saturated material, is also crucial to the formation of SSD structures. The mineralogic content of deformed levels is composed of i) quartz, chalcedony, orthose, plagioclase, pyroxenes and biotite, opaques (magnetite and ilmenite, autigenic pyrite) in crystalline aggregates; ii) undetermined Fe oxides; and iii) colorless and light-brown unaltered volcanic glass shards, clays identified as smectite-illite interstratified and scarce kaolinite. Grains are mainly subangular and, to a lesser extent, sub-round and round. The surface of the majority of grains in the study area was found clean and with some marks. The percentage of CaCO3 was found to vary from 0.5 to 3% and that of total organic carbon (TOC) was found to reach 1.5%. Deformations may be produced as a result of load deformation mechanisms, fluid escape, basal slumping or pressure-directed displacements. Due to load deformation mechanisms, structures are linked to gravity-related movements occurring during the initial stages of deposition. For these deformations to occur, grain-size at the overlaying levels should be thicker than at the underlying levels, for example, sandstones rather than silstones or claystones. These deformations are related to water saturation at the deformed level (fluidization-liquefaction). Therefore, deformation mechanisms, which involve both expulsion and rotation of fragments as well as fluid escape, are characterized by the action of lithostatic pressure which produces movement (deformation) and by the action of the underlying sedimentary levels. Deformations may also result from a fluid escape mechanism, i.e., from a mechanism associated to i) the spatial arrangement of grains (packing), ii) their shape, iii) their tendency to inequigranularity, and iv) the communication among macro- and micro- pores as well as the high or low sinuosity connection among themselves (Net and Limarino, 2000). Further requirements for deformations to occur include particular thixotrophic conditions, especially the presence of colloids among grains. The rupture of unions of particles either by hitting or by shearing is, among others, a cause which produces an unbalance between hydrostatic pressure and lithostatic pressure. If the latter is altered, the energetic unbalance makes fine sediments flow among the weakly lithified sandstones whose extrusion will occur via both vertical and horizontal pore ducts (Lopez Gamundi, 1986; Clauss, 1993). Basal slumping produces deformations that are associated not only to soft sediments deposited in natural slopes but also to interbedded sand- and mud-levels. Layers tend to have a prismatic-shaped geometry whose materials are under ductile-to-fragile conditions, in which antique layers support younger ones. Once horizontality is affected, movement, which is marked by a rupture of the original slope, begins. The lower levels are expected to transport the upper ones without affecting the original succession of layers. At the delay of movement derived from the compressive effect of the displacement front, fluids extrude forming cones or cut dikes (Fig. 10). Several deformations of this type initiate movement as result of differences in the hydrostatic gradient (Strachan, 2002). Deformations may be also produced as a result of pressure-directed displacements which are conditioned by the compaction level, thickness and ability of materials to deform. Thus, deformations occur because the original level is saturated in water as a result of the ductile behavior of materials (Bracco et al., 2005). Laird (1968) claims that SSD structures should meet some of the following requirements to be considered of seismic origin: slightly curved strata walls and floors to follow the original stratification and interruption of continuity of the stratum that is marked by a scar in which the sedimentary fillings keep their characteristics both above and below stratification. There could be rotated sediment clasts below the discontinuity as a result of a thrust-induced drag of the upper sedimentary packing. These processes could be, in turn, triggered either by the charge or pressure of the lithologic column, storm waves and seismicity. Storm-wave impact may also produce deformation in soft sediments. Nonetheless, no high energy structures such as cross-beddings or tsunami-type chaotic sedimentation were observed in our study area. Noteworthingly, for stormwave-derived liquefaction to occur, waves should reach magnitudes higher than 6 m (Alfaro et al., 2002), this being a phenomenon that was not recorded in our study area. Taken together, findings from the present study indicate that SSD structures in our study area are seismic alterations that occurred in an event during the Andean cycle whose beginnings are traced approximately 45 My ago. The fact that i) both the roofs and bottoms of these structures are not associated to other processes of deformation, ii) their thickness does not exceed one meter, and iii) they are confined to a transitional area between the middle and top members of the Río Negro Formation, lying in some cases on claystones and in some other cases, on siltstones, originated in an interdune paleorelief, confirms their seismic origin.

Scientific Electronic Library Online (Spanish)

73

Estimating the monthly pCO2 distribution in the North Atlantic using a self-organizing neural network

Telszewski, M.; Chazottes, A.; Schuster, U.; Watson, Andrew J.; Moulin, C.; Bakker, D. C. E.; González Dávila, Melchor; Johannessen, T.; Körtzinger, Arne; Lüger, H.; Olsen, A.; Omar, A.; Padín, X. Antonio; Ríos, Aida F.; Steinhoff, T.; Santana Casiano, J. Magdalena; Wallace, D. W. R.; Wanninkhof, R.
2009-08-01

Digital.CSIC (Spain)

74

Enhancement of CaO for CO2 capture in an FBC environment

Salvador, C.; Lu, D.; Anthony, Edward J.; Abanades García, Juan Carlos
2003-09-28

Digital.CSIC (Spain)

75

Enhanced life-cycle supercapacitors by thermal treatment of mesophase-derived activated carbons

Ruiz Ruiz, Vanesa ; Blanco Rodríguez, Clara ; Granda Ferreira, Marcos ; Santamaría Ramírez, Ricardo

6 pages, 6 figures.-- Printed version published Dec 30, 2008. | This paper studies the effect of thermal treatment on the long-term performance of carbon-based supercapacitors. Two active electrode materials were studied: a mesophase derived activated carbon (AC), rich in oxygen functionalities, and...

DRIVER (Spanish)

76

Enhanced life-cycle supercapacitors by thermal treatment of mesophase-derived activated carbons

Ruiz Ruiz, Vanesa; Blanco Rodríguez, Clara; Granda Ferreira, Marcos; Santamaría Ramírez, Ricardo
2008-08-07

Digital.CSIC (Spain)

77

Electrochemical supercapacitors based on novel hybrid materials made of carbon nanotubes and polyoxometalates

Cuentas Gallegos, A. K.; Martínez-Rosales, Rosa; Baibarac, Mihaela; Gómez-Romero, P.; Rincón, Marina E.
2007-08-01

Digital.CSIC (Spain)

78

Electrocatalytic oxidation of nitrite to nitrate mediated by Fe(III) poly-3-aminophenyl porphyrin grown on five different electrode surfaces

Armijo, Francisco; Goya, M. Carmen; Reina, Matías; Canales, M. Josefina; Arévalo, Maria Carmen; Aguirre, M. Jesús
2007-05-01

Digital.CSIC (Spain)

81

Effect of the thermal treatment of carbon-based electrodes on the electrochemical performance of supercapacitors

Ruiz Ruiz, Vanesa; Blanco Rodríguez, Clara; Granda Ferreira, Marcos; Menéndez López, Rosa M.ª; Santamaría Ramírez, Ricardo
2008-02-25

Digital.CSIC (Spain)

82
83

Effect of solar and artificial UV radiation on photosynthetic performance and carbonic anhydrase activity in intertidal macroalgae from southern Spain/ Efecto de la radiación UV solar y artificial sobre la fotosíntesis y la actividad anhidrasa carbónica en macroalgas intermareales del sur de España

Viñegla, B; López-Figueroa, F
2009-03-01

Resumen en español En este trabajo se estudió el efecto de la radiación UV sobre la tasa de fotosíntesis y la incorporación de C, estimada mediante la actividad anhidrasa carbónica, incubando algas intermareales, i.e., Fucus spiralis (Phaeophyta) y Ulva olivascens (Chlorophyta), bajo radiación solar y artificial. En los experimentos se aplicaron tratamientos de exclusión de la radiación UV-B o UV-A + UV-B. Los talos de U. olivascens y F. spiralis mostraron respuestas completamente d (mas) iferentes cuando se expusieron a radiación artificial y tres tratamientos de luz (PAR + UV-A + UV-B, PAR + UV-A y sólo PAR). La tasa de fotosíntesis aumentó en F. spiralis tras 24 h de exposición aunque en presencia de radiación UV-B el aumento fue un poco menor. Por otro lado, U. olivascens mostró el patrón contrario, con un descenso de las tasas de fotosíntesis en todos los tratamientos aunque éste fue menor en presencia de radiación UV-B. Por el contrario, la incorporación de C se vio estimulada en presencia de UV-B, siendo este efecto más claro en el caso de F. spiralis mientras que, en presencia de radiación UV-A, se dio un efecto inhibitorio similar en ambas especies. También se expusieron talos de U. olivascens y F. spiralis a radiación solar en periodos diarios y anuales. Existió un acoplamiento de la tasa de fotosíntesis con la irradiancia incidente en F. spiralis, mientras que en U. olivascens se dio un descenso en presencia de radiación UV-A o UV-A + UV-B. En U. olivascens se observó un incremento significativo de la incorporación de C pero no se encontró un patrón claro en ninguno de los tratamientos de luz en F. spiralis. Durante un ciclo anual la incorporación de C en U. olivascens disminuyó en comparación con los valores iniciales en los tratamientos PAR y PAR + UV-A durante el invierno. Los altos valores de incorporación de C se mantuvieron hasta el final de la primavera cuando los elevados niveles de energía incidente podrían estimular la fotoinhibición en presencia de UV-B. La ausencia de una respuesta general a la radiación UV en las microalgas estudiadas podría deberse a sus diferentes mecanismos de fotoprotección, a sus características fisiológicas-morfológicas y a su aclimatación a las condiciones ambientales particulares. Resumen en inglés The effect of UV radiation on photosynthetic rate and carbon uptake, estimated as carbonic anhydrase activity, was studied by incubating intertidal algae, Fucus spiralis (Phaeophyta) and Ulva olivascens (Chlorophyta), under both artificial and solar radiation. In these experiments, treatments excluding UV-B or UV-A + UV-B radiations were applied. Thalli of U. olivascens and F. spiralis showed completely different responses when exposed to artificial radiation and three di (mas) fferent light treatments (PAR + UV-A + UV-B, PAR + UV-A, and only PAR). After exposure for 24 h, photosynthetic activity increased in F. spiralis, although the presence of UV-B slightly reduced the increase, whereas U. olivascens showed an inverse pattern, with decreasing photosynthetic rates in all the treatments and with the lowest decrease in the presence of UV-B radiation. Surprisingly, the presence of UV-B stimulated carbon uptake, though this effect was more clear in the case of F spiralis, while a similar inhibitory effect of UV-A radiation was found in both species. Thalli of U. olivascens and F. spiralis were also exposed to solar radiation for daily and yearly periods. The photosynthetic rate was coupled to incident irradiance in F. spiralis, whereas in U. olivascens a significant decrease in the presence of both UV-A or UV-A + UV-B was found. A significant increase of carbon uptake in the presence of UV-B radiation was observed in U. olivascens, while no clear pattern was found in F. spiralis under any of the light treatments. During an annual cycle, carbon uptake in U. olivascens decreased in winter, compared with the initial levels, in the PAR and PAR + UV-A treatments. The high level of carbon uptake was maintained until the end of spring, when higher levels of incident energy might promote photoinhibition (in the presence of UV-B). The absence of a general response to UV radiation in the macroalgae studied may be due to their different photoprotection mechanisms, physiological-morphological characteristics, and acclimation to environmental conditions.

Scientific Electronic Library Online (Spanish)

84

Effect of plant cover decline on chemical and microbiological parameters under Mediterranean climate

García Izquierdo, Carlos; Hernández Fernández Muñoz, María Teresa; Roldán Garrigos, Antonio; Martín Ramos, Amalia
2002-05-01

Digital.CSIC (Spain)

85

EPD of thick films for their application in lithium batteries

Ferrari Fernández, Begoña; Moreno, Rodrigo; Hernán, L.; Melero, M.; Morales, J.; Caballero, A.
2007-01-01

Digital.CSIC (Spain)

86

Dynamic Modeling of Food-Chain Accumulation of Brominated Flame Rettardants in Fish from the Ebro River Basin

Van Beusekom, Otto. C; Eljarrat, Ethel; Barceló, Damià; Koelmans, Albert. A
2006-10-01

Digital.CSIC (Spain)

87

Diel variations in bacterial heterotrophic activity and growth in the northwestern Mediterranean Sea

Gasol, Josep M.; Doval, M. Dolores; Pinhassi, Jarone; Calderón-Paz, Juan I.; Guixa-Boixareu, Núria; Vaqué, Dolors; Pedrós-Alió, Carlos
1998-04-09

Digital.CSIC (Spain)

88

Developing strategies for the regeneration of polyethylenimine based CO2 adsorbents

Drage, Trevor C.; Smith, Karl M.; Arenillas de la Puente, Ana; Snape, Colin E.
2007-01-01

Digital.CSIC (Spain)

89

Detection and interpretation of cyclic patterns in coals from Los Cuervos Formation, Venezuela/ Detección e interpretación de patrones cíclicos en carbones de la Formación Los Cuervos, Venezuela

Martínez S, Manuel; Garbán, Grony; Benavides, Alfonso; Escobar N, Marcos; Esteves, Iván
2005-12-01

Resumen en español Se colectó un total de 21 muestras de carbón pertenecientes a la Formación Los Cuervos en Villa Páez, estado Táchira, Venezuela, con la finalidad de establecer variaciones verticales en sus parámetros geoquímicos. Las muestras fueron sometidas a los análisis inmediatos (humedad, materia volátil, carbono fijo y cenizas), elementales (C, H, N, S) y análisis petrográfico. Se encontró una correlación estadísticamente significativa (coeficiente de correlación de (mas) Spearman > 0,80) entre la concentración de azufre y cenizas en los carbones, con el espesor de los mantos y su ubicación en cada litofacies: en aquéllas en las que los carbones son esporádicos, los mantos son delgados, ricos en azufre y cenizas. Por el contrario, en las litofacies donde los carbones presentan una gran abundancia, éstos son de gran espesor, limpios (S Resumen en inglés A total of 21 coal samples, belonging to Los Cuervos Formation, were taken in Villa Páez, Táchira State, Venezuela, with the aim of establishing vertical variations in their geochemical parameters. The samples were subject to immediate (moisture, volatile matter, fixed carbon and ash), elemental (C, H, N, S) and petrographic analysis. It was found a significant correlation between sulfur and ash content in coals, with width of beds, and their location in each lithofacie (mas) s (Spearman correlation coefficient > 0.80): those in which coals are sporadic, the beds are thin, high in sulfur and ash. On the contrary, in lithofacies with abundant coal seams, these are of great thickness, clean (S

Scientific Electronic Library Online (Spanish)

90

DOM fluorescence, a tracer for biogeochemical processes in a coastal upwelling system (NW Iberian Peninsula)

Nieto-Cid, Mar; Álvarez-Salgado, Xosé Antón; Gago, J.; Pérez, Fiz F.
2005-08-01

Digital.CSIC (Spain)

91

Cycling of dissolved and particulate carbohydrates in a coastal upwelling system (NW Iberian Peninsula)

Nieto-Cid, Mar; Álvarez-Salgado, Xosé Antón; Brea, S.; Pérez, Fiz F.
2004-11-30

Digital.CSIC (Spain)

92

Conversion Limits in the Reaction of CO2 with Lime

Abanades García, Juan Carlos; Álvarez Rodríguez, Diego
2003-01-28

Digital.CSIC (Spain)

93

Contrasting responses of photosynthesis and carbon metabolism to low temperatures in tall fescue and clovers.

Pérez, P.; Morcuende, R.; Martín del Molino, Isabel; Sánchez de la Puente, L.; Martínez-Carrasco, R.
2001-01-01

Digital.CSIC (Spain)

94

Comparison of Natural and Synthetic Precursors of CaO as CO2 sorbents

Grasa, Gemma S.; González García, Belén; Alonso Carreño, Mónica; Abanades García, Juan Carlos
2007-01-01

Digital.CSIC (Spain)

96

Climate change and coastal hydrographic response along the Atlantic Iberian margin (Tagus Prodelta and Muros Ría) during the last two millennia

Lebreiro, S. M.; Francés, G.; Abrantes, F. F. G.; Diz, P.; Bartels-Jónsdóttir, H. B.; Stroynowski, Z. N.; Gil, I. M.; Pena, L. D.; Rodrigues, T.; Jones, P. D.; Nombela, M. A.; Alejo, I.; Briffa, K. R.; Harris, I.; Grimalt, Joan O.
2006-11-01

Digital.CSIC (Spain)

97

Carbon-Enriched coal fly ash as a precursor of activated carbons for SO2 Removal

Izquierdo Pantoja, María Teresa; Rubio Villa, Begoña; Elsevier
2007-11-22

Digital.CSIC (Spain)

99
100

Bioremediation of oil refinery sludge by landfarming in semiarid conditions: Influence on soil microbial activity

Marín, Antonio; Hernández Fernández Muñoz, María Teresa; García Izquierdo, Carlos
2005-06-01

Digital.CSIC (Spain)

101

Bioremediation of Soil Degraded by Sewage Sludge: Effects on Soil Properties and Erosion Losses

Ros Muñoz, Margarita Matilde; Hernández Fernández Muñoz, María Teresa; García Izquierdo, Carlos
2003-06-01

Digital.CSIC (Spain)

102

Bacterial assemblage structure and carbon metabolism along a productivity gradient in the NE Atlantic Ocean

Alonso-Sáez, Laura; Arístegui, Javier; Pinhassi, Jarone; Gómez-Consarnau, Laura; González, José M.; Vaqué, Dolors; Agustí, Susana; Gasol, Josep María
2007-01-19

Digital.CSIC (Spain)

103

Bacterial activity in NW Mediterranean seagrass (Posidonia oceanica) sediments

López, Nancy I.; Duarte, Carlos M.; Vallespinós, Ferrán; Romero Sánchez, Javier; Alcoverro, Teresa
1995-04-18

Digital.CSIC (Spain)

104

Aspectos biológicos y epidemiológicos del carbón del maní (Arachis hypogaea L.) ausado por Thecaphora frezii Carranza & Lindquist/ Biological and epidemiological aspects of peanut smut (Arachis hypogaea L.) caused by Thecaphora frezii Carranza & Lindquist

Marinelli, A.; March, G.J.; Oddino, C.
2008-06-01

Resumen en español El carbón fue detectado por primera vez en maní cultivado en la campaña 1994/95, y desde entonces se ha observado en lotes aislados y con baja incidencia. Considerando la importancia de este cultivo para Córdoba, y que el 80% de la producción es destinada a exportación, se estudiaron aspectos biológicos y epidemiológicos de la enfermedad. Para determinar sitios y forma de infección (postulados de Koch) se realizaron inoculaciones a flores y suelo y se sembraron s (mas) emillas parcialmente afectadas y contaminadas externamente. Para cuantificar la enfermedad se monitorearon lotes (prevalencia e incidencia) en siete campañas agrícolas, y se desarrollo una metodología para detectar el patógeno en muestras de suelo. Se concluye que Thecaphora frezii es el causal del carbón de frutos de maní cultivado y que la infección es localizada en el ginóforo cuando penetra al suelo. Los únicos órganos colonizados son los frutos y las semillas, que pueden transformarse en una masa carbonosa. La dispersión ocurre a través de semilla enferma o contaminada externamente. El patógeno sobrevive en el suelo y es posible detectarlo mediante muestreos y observación al microscopio de las teliosporas. La prevalencia osciló entre 9-24% de lotes monitoreados, y la incidencia entre 0,13 y 2,7%; se detectó un lote con incidencia 6,4%. Resumen en inglés Smut was first detected in peanut plants cultivated during the agricultural cycle 1994/95, and since then it has been observed only in some commercial peanut fields, with low incidence. Due to the importance of peanut crop for Cordoba (Argentina), and to the fact that 80% of the production is assigned to exportation, biological and epidemiological aspects of the disease were studied. Flower and soil inoculations were made under controlled conditions in order to accomplish (mas) Koch's postulates, and to detect the sites and forms of infection by the fungus. Partially infected seeds as well as externally contaminated seeds were employed. To detect and quantify the disease through prevalence and incidence, field monitoring was carried out over seven crop years, and a methodology that allowed pathogen detection from soil samples was performed. The conclusion arrived at is that Thecaphora frezii is the causal agent of smut of cultivated peanut, and that the infection is localized, occurring in the peg when it penetrates the soil. The only colonised organs are the fruits and the seeds which can be transformed into carbonose mass. The dispersion of the fungus would be through infected or externally contaminated seeds. The pathogen survives in the soil and its detection is possible by taking soil samples and by observing the teliospores under a microscope. Prevalence oscillated between 9 and 24% of the monitored fields, while incidence varied between 0.13% and 2.7%; only one field with 6.4% was detected.

Scientific Electronic Library Online (Spanish)

105

Anthropogenic nutrient sources and loads from a Mediterranean catchment into a coastal lagoon: Mar Menor, Spain

García-Pintado, Javier; Martínez-Mena García, M. Dolores; González Barberá, Gonzalo; Albaladejo Montoro, Juan; Castillo Sánchez, Victor Manuel
2007-02-01

Digital.CSIC (Spain)

106

Annual series of DMSP contribution to S and C fluxes through phytoplankton and bacterioplankton in a NW Mediterranean coastal site

Simó, Rafel; Vila-Costa, Maria; Alonso-Sáez, Laura; Cardelús, Clara; Guadayol, Òscar; Vázquez-Domínguez, Evaristo; Gasol, Josep M.
2009-01-01

Digital.CSIC (Spain)

107

An analysis of the effect of carbonation conditions on CaO deactivation curves

Arias, Borja; Abanades, Juan Carlos; Grasa, Gemma S.
2011-01-01

Digital.CSIC (Spain)

108

An activated carbon monolith as an electrode material for supercapacitors

Ruiz Ruiz, Vanesa; Blanco Rodríguez, Clara; Santamaría Ramírez, Ricardo; Ramos-Fernández, J. M.; Martínez-Escandell, M.; Sepúlveda-Escribano, A.; Rodríguez-Reinoso, F.
2009-01-01

Digital.CSIC (Spain)

110

Advances in analytical and applied pyrolysis 2006-2008

González-Pérez, José A.; González-Vila, Francisco J.
2008-01-01

Digital.CSIC (Spain)

111

Advances in Natural Organic Matter and Humic Substances Research 2008-2010 (Vol. 1, 2 & 3)

González-Pérez, José A.; González-Vila, Francisco J.; Almendros, G.
2010-01-01

Digital.CSIC (Spain)

112

A study of Faradaic phenomena in activated carbon by means of macroelectrodes and single particle electrodes

Ruiz Ruiz, Vanesa; Malmberg, H.; Blanco Rodríguez, Clara; Lundblad, A.; Björnbom, P.; Santamaría Ramírez, Ricardo
2008-03-18

Digital.CSIC (Spain)

113

A physiological approach to oceanic processes and glacial-interglacial changes in atmospheric CO2 | Un enfoque fisiológico para los procesos oceánicos y los cambios glaciares-interglaciares del CO2 atmosférico

Pelegrí, Josep Lluís

18 pages, 6 figures, 1 table. | [EN] One possible path for exploring the Earth’s far-from-equilibrium homeostasis is to assume that it results from the organisation of optimal pulsating systems, analogous to that in complex living beings. Under this premise it becomes natural to examine the Earth’s ...

DRIVER (Spanish)

115

A dynamic model of oceanic sulfur (DMOS) applied to the Sargasso Sea: Simulating the dimethylsulfide (DMS) summer paradox

Vallina, Sergio M.; Simó, Rafel; Anderson, T. R.; Gabric, A.; Cropp, R.; Pacheco, J. M.
2008-02-06

Digital.CSIC (Spain)

116