Search results for "cuba"
showing 10 items of 340 documents
Cold plumes trigger contamination of oceanic mantle wedges with continental crust-derived sediments: Evidence from chromitite zircon grains of easter…
2018
The origin of zircon grains, and other exotic minerals of typical crustal origin, in mantle-hosted ophiolitic chromitites are hotly debated.We report a population of zircon grains with ages ranging from Cretaceous (99 Ma) to Neoarchean (2750 Ma), separated from massive chromitite bodies hosted in the mantle section of the supra-subduction (SSZ)-type Mayarí-Baracoa Ophiolitic Belt in eastern Cuba. Most analyzed zircon grains (n = 20, 287 +/- 3 Ma to 2750 +/- 60 Ma) are older than the early Cretaceous age of the ophiolite body, show negative εHf(t) (+/-26 to +/-0.6) and occasional inclusions of quartz, K-feldspar, biotite, and apatite that indicate derivation from a granitic continental crust…
A method for the preparation of repacked soil cores with homogeneous aggregates for studying microbial nitrogen transformations under highly controll…
1998
International audience; he feasibility of studies on nitrate transformations during incubation in controlled conditions of air-filled porosity using a method of soil core preparation was investigated. Repacked cores were obtained by uniaxial confined compression in a cylindrical mould of a mass of calibrated and conveniently wet aggregates with a water content selected to saturate the textural porosity of the soil aggregates, imposing structural porosity and thereby producing controlled conditions of aeration. The principle and the descrip- tion of the incubation method are explained and some denitrification and respiration data obtained with low and increasing OZ partial pressures are pres…
Modelling hydrolysis: Simultaneous versus sequential biodegradation of the hydrolysable fractions
2018
Hydrolysis is considered the limiting step during solid waste anaerobic digestion (including co-digestion of sludge and biosolids). Mechanisms of hydrolysis are mechanistically not well understood with detrimental impact on model predictive capability. The common approach to multiple substrates is to consider simultaneous degradation of the substrates. This may not have the capacity to separate the different kinetics. Sequential degradation of substrates is theoretically supported by microbial capacity and the composite nature of substrates (bioaccessibility concept). However, this has not been experimentally assessed. Sequential chemical fractionation has been successfully used to define i…
Incubation behaviour of Great Tits Parus major in response to ambient temperature in three contrasting Mediterranean habitats
2021
Esta tesis fue leída el 14 de junio de 2021 en la Universidad de Valencia y forma parte del Doctoral Program in Biodiversity and Evolutionary Biology (RD 99/2011) del Departamento de Zoología de la Facultad de Ciencias Biológicas de dicha universidad.-168 pp.-
Efficacy of clove oil and ethanol against Saprolegnia sp. and usability as antifungal agents during incubation of rainbow trout Oncorhynchus mykiss (…
2013
Inhibitory concentrations of clove oil and ethanol against growth of Saprolegnia sp. hyphae were screened by a modification of the hemp (Cannabis sativa L.) seed MicroPlate (HeMP) method and their usability as antifungal agents during incubation of rainbow trout Oncorhynchus mykiss eggs was tested. In vitro experiment showed that in continuous static exposure, clove oil at 100 mg L−1 significantly inhibited the growth of Saprolegnia, whereas in bath exposures, clove oil at 500 mg L−1 had no significant effect at any exposure time tested (15, 60 and 240 min), but clove oil at 10 000 mg L−1 significantly inhibited growth at all exposure times. Clove oil and ethanol treatments had no visible e…
La palabra es de ustedes, me callo por pudor: Antiintelectualismo y emergencia del testimonio en Cuba
2013
El artículo señala y analiza la presencia del testimonio como función no conceptualizada en los debates sobre el papel del intelectual revolucionario en la Cuba de los años sesenta. Algunas canciones de la Nueva Trova Cubana aludían explícitamente a la enunciación testimonial como una forma de superar el descrédito que la voz intelectual había sufrido en esos debates, ligando la emergencia del testimonio al auge del antiintelectualismo. Esa relación se hallaba ya presente, como demuestra el artículo, en los textos de Castro o Guevara, y continuaría estándolo en la instauración del premio testimonio de Casa de las Américas en 1970. The author shows and analyzes the presence of testimony as a…
Art and the city. A meeting on the border
2019
The essay departs from the ancient greek myth of Prometheus, symbolizing the idea of progress and the passage of man from a state of nature to a state of artifice, in order to critics the modern perspective of “unlimited growth”, brought about by hyper-liberalist capitalism. It contextualizes this prometheian-like dynamics of “rushing into modernity” within the phenomena of implosion and explosion of cities today. A post urban / post rural kingdom where man seems to have abandoned the notion of territory, contemplated as a resource to be exploited only, as a result of the breaking down of the co-evolutionary relationship between human settlement, nature and work. Against this pessimistic ta…
Movements of water rails from Norway-reference-data
2020
Lislevand T, Hahn S, Rislaa S, Briedis M. 2020. First records of complete annual cycles in water rails Rallus aquaticus show evidence of itinerant breeding and a complex migration system. J Avian Biol. doi:10.1111/jav.02595
Movements of water rails from Norway-tracks
2020
Lislevand T, Hahn S, Rislaa S, Briedis M. 2020. First records of complete annual cycles in water rails Rallus aquaticus show evidence of itinerant breeding and a complex migration system. J Avian Biol. doi:10.1111/jav.02595
Movements of water rails from Norway-light-levels
2020
Lislevand T, Hahn S, Rislaa S, Briedis M. 2020. First records of complete annual cycles in water rails Rallus aquaticus show evidence of itinerant breeding and a complex migration system. J Avian Biol. doi:10.1111/jav.02595