Search results for "ope.fi"
showing 10 items of 55 documents
Carbon and nitrogen stable isotopic inventory of the most abundant demersal fish captured by benthic gears in southwestern Iceland (North Atlantic)
2009
International audience; Stable isotopes (δC and δN) were used to examine the origin of organic matter for the most representative demersal species of the SW Icelandic fishery, accounting for over 70% of landings of those species in the North Atlantic. Samples were collected during a 2-week period in early September 2004 from landings and directly during fishing cruises. Stable isotopes showed that particulate organic matter and sedimentary organic matter were at the base of the food web and appeared to fill two different compartments: the pelagic and the benthic. The pelagic realm was composed of only capelin and sandeel; krill and redfish occupied an intermediate position between pelagic a…
Hronotops A. Manfeldes romānā “Vilcēni”, A. Jundzes romānā “Sarkanais dzīvsudrabs” un J. Joņeva romānā “Jelgava 94”
2022
Maģistra darba “Hronotops A. Manfeldes romānā “Vilcēni”, A. Jundzes romānā “Sarkanais dzīvsudrabs” un J. Joņeva romānā “Jelgava 94” mērķis ir raksturot un analizēt fiktīvo romānu 20. gadsimta 90. gadu laiktelpu Latvijā un citus ar to saistītus literāros hronotopus. Darba teorētiskajā daļā sniegts hronotopa teorētiskais ieskats, ieskats semiotiskajā un naratoloģijas pētniecības metodē; aplūkota hronotopa un romāna saistība; ieskats romānu recepcijā kritikā; sniegts ieskats kultūrvēsturiskajā situācijā un pilsētas laiktelpā. Pētījuma praktiskajā daļā tiek analizēts 20. gadsimta 90. gadu hronotops romānos caur naratīvu un kā tas atklājas caur dažādām semiotiskajām zīmēm pilsētvidē.
Decay of48-50Ar isotopes
2011
International audience; Information on β-decay properties of neutron-rich 84-05Ar was obtained at the ISOLDE mass-separator facility at CERN using isobaric selectivity. This was achieved by a combination of a plasma-ion source with a cooled transfer line and subsequent mass-separation. Normally, argon beams cannot be mass-separated from intense multi-charged symmetric fission krypton and xenon. Several techniques were used successfully in order to overcome this problem. Implication of the obtained information for a better understanding of the origin of the 48Ca/46Ca isotopic anomaly discovered in inclusions from the Allende meteorite is discussed.
Una ética de la excelencia: Cayetana de la Cerda y la circulación de Madame de Lambert en España
2015
En este artículo se sintetizan las líneas maestras del pensamiento de Anne-Thérèse Marguenat, marquesa de Lambert (1647-1733) y se profundiza en el eco que su obra tuvo en España, aclarando algunos episodios poco conocidos y arrojando luz sobre el contexto en el que se realizó y publicó finalmente la versión castellana de sus ensayos y sobre la personalidad intelectual y circunstancias sociales de su traductora, Cayetana de la Cerda y Vera, condesa de Lalaing (1755-1798). Se pretende así analizar las prácticas de transferencia y mediación cultural, interrogándonos sobre los significados con que su pensamiento y su figura pudieron ser investidos por parte de los sujetos implicados en su lect…
Decay properties of neutron-rich niobium isotopes
1976
The decay of neutron-rich niobium isotopes in the mass region $A\ensuremath{\simeq}100$ has been investigated by $\ensuremath{\gamma}$-ray singles and $\ensuremath{\gamma}$-$\ensuremath{\gamma}$ coincidence measurements. The isotopes were produced by thermal-neutron induced fission of $^{235}\mathrm{U}$, $^{239}\mathrm{Pu}$, and $^{249}\mathrm{Cf}$, and niobium was separated from fission-product mixtures with an automated chemical procedure. Isomerism was found in the even-mass niobium isotopes with the following half-lives: 1.5 and 3.1 sec for $^{100}\mathrm{Nb}$, 1.3 and 4.3 sec for $^{102}\mathrm{Nb}$, and 0.8 and 4.8 sec for $^{104}\mathrm{Nb}$. Half-lives and $\ensuremath{\gamma}$ rays…
The Contribution of Microscopy to the Study of Alzheimer’s Disease, Amyloid Plaques and Aβ Fibrillogenesis
2006
A broad survey is presented in this chapter, dealing with the impact that microscopy has made to the study of Alzheimer’s disease, amyloid plaques and amyloid-β fibrillogenesis. This includes classical light microscopy and the modern immunolabelling and confocal microscopies, together with the contribution of transmission electron microscopy and atomic force microscopy. Whilst usefully standing alone, the individual microscopies often contribute most effectively when they are integrated with cellular, biophysical and molecular approaches.
The effects of anthropogenic organic matter inputs on stable carbon and nitrogen isotopes in organisms from different trophic levels in a southern Me…
2005
Stable isotope ratios were used to determine the impact of anthropogenically derived organic matter from onshore and offshore fish farming and a sewage outfall on organisms at different trophic levels (primary producers and consumers) on the south-east coast of Sicily (Italy, Mediterranean). Representative macroalgae and consumers were collected in three sampling locations: "Impact" and two putative "Controls" sited to the north of the impacted location. While delta(13)C values of both organic matter sources and consumers varied little between locations, delta(15)N spatial variability was higher and delta(15)N was shown to be a good descriptor of organic enrichment and uptake of anthropogen…
A study of a differential method for a field diffracted by a rough surface
2006
Since more than one decade, a new generation of microscopes was developed. It is about near field microscopes. Among these devices, we are interested in the PSTM (Photon Scanning Tunnelling Microscopy). Images obtained by this instrument do not reflect, with a better resolution, the topography of the studied samples. In order to improve the performance of this apparatus, several models have been developed. In our case, we propose to retake, by using a differential method, the study of a rough surface. The surface is modelled as two pavements of different sizes and refractive indices. Theoretically, the obtained results agree well with results obtained for a surface having submicronic asperi…
Abrupt elastic-to-plastic transition in pentagonal nanowires under bending
2019
MD modeling and calculations were supported by Russian Science Foundation project grant 18-19-00645 “Adhesion of polymer-based soft materials: from liquid to solid”; mechanical testing and FEM simulations were supported by Estonian Research Council projects PUT1689 and PUT1372.
The food and parasites of fish in some deep basins of northern L. Päijänne
1982
The composition of the fish stock, food and ‘macroparasites’ were studied in eleven basins (22–100 m) of Lake Jyvasjarvi and North Paijanne in August–September 1976. The fishing was done by means of a series of nets (meshes 15, 21 and 35 mm) laid on the bottom overnight. No fish were found in the two northernmost basins owing to bad oxygen conditions caused by waste waters. Smelt and burbot were the most abundant fish in the catches in other basins but the vendace was rare. Relict crustaceans and some ‘deep water’ copepods (e.g. Heterocope borealis) played an important role in the food of fish in all basins.