Search results for "ATL"

Phytochemical and pharmacological properties of essential oils from Cedrus species

2017

Natural products frequently exert pharmacological activities. The present review gives an overview of the ethnobotany, phytochemistry and pharmacology of the Cedrus genus, e.g. cytotoxic, spasmolytic immunomodulatory, antiallergic, anti-inflammatory and analgesic activities. Cancer patients frequently seek remedies from traditional medicinal plants that are believed to exert less side effects than conventional therapy with synthetic drugs. A long-lasting goal of anti-cancer and anti-microbial therapy research is to find compounds with reduced side effects compared to currently approved drugs. In this respect, Cedrus species might be of interest. The essential oil isolated from Cedrus libani…

Nyctiphanes couchii as intermediate host for Rhadinorhynchus sp. (Acanthocephala, Echinorhynchidae) from NW Iberian Peninsula waters

2013

12 páginas, 3 figuras, 3 tablas

A 45-year sub-annual reconstruction of seawater temperature in the Bay of Brest, France, using the shell oxygen isotope composition of the bivalve Gl…

2020

A reconstruction of sea surface temperature (SST) spanning 45 years (1966–2011) was developed from δ18O obtained from the aragonitic shells of Glycymeris glycymeris, collected from the Bay of Brest, France. Bivalve sampling was undertaken monthly between 2014 and 2015 using a dredge. In total, 401 live specimens and 243 articulated paired valves from dead specimens were collected, of which 24 individuals were used to reconstruct SST. Temperatures determined using the palaeotemperature equation of Royer et al. compared well with observed SST during the growing season between 1998 and 2010 (Pearson’s correlation: p = 0.002, r = 0.760). Furthermore, a significant negative correlation was foun…

Decadal climate variability of the North Sea during the last millennium reconstructed from bivalve shells (Arctica islandica)

2014

Uninterrupted, annually resolved paleoclimate records are crucial to contextualize the current global change. Such information is particularly relevant for the Europe realm for which weather and climate projections are still very challenging if not virtually impossible. This study presents the first precisely dated, annually resolved, multiregional Arctica islandica chronologies from the North Sea which cover the time interval ad 1040–2010 and contain important information on supra-regional climatic conditions (sea surface temperature (SST), ocean productivity, wind stress). Shell growth varied periodically on timescales of 3–8, 12–16, 28–36, 50–80, and 120–240 years, possibly indicating a…

Cuban stalagmite suggests relationship between Caribbean precipitation and the Atlantic Multidecadal Oscillation during the past 1.3 ka

2012

Here we present the first high-resolution δ18O record of a stalagmite from western Cuba. The record reflects precipitation variability in the northwestern Caribbean during the last 1.3 ka and exhibits a correlation to the Atlantic Multidecadal Oscillation (AMO). This suggests a relationship between Caribbean rainfall intensity and North Atlantic sea-surface temperature (SST) anomalies. A potential mechanism for this relationship may be the strength of the Thermohaline Circulation (THC). For a weaker THC, lower SSTs in the North Atlantic possibly lead to a southward shift of the Intertropical Convergence Zone and drier conditions in Cuba. Thus, this Cuban stalagmite records drier conditions…

Abric de la Ratlla del Bubo (Crevillent, Alicante). Results of the 1986-1991 campaigns. New data on its palaeolithic sequence

2022

El Abric de la Ratlla del Bubo (Crevillent, Alicante) es uno de los yacimientos clave para el conocimiento del Paleolítico superior en el área central del Mediterráneo ibérico, especialmente en lo que a sus fases iniciales se refiere. El yacimiento ha sido objeto de varias intervenciones arqueológicas, tanto clandestinas como científicas. Sin embargo, hasta este trabajo, la información disponible era parcial y, en muchos casos, remitía a materiales sin referencia estratigráfica. En este estudio se exponen los resultados del análisis del material lítico, del registro vegetal y de la fauna recuperada en las campañas de 1986 a 1991. Además, se presenta una amplia serie de dataciones radiocarbó…

A presença fenícia em Lisboa: novos vestígios descobertos no alto da colina do Castelo de São Jorge

2018

Neste trabalho apresentam-se os primeiros contextos bem caracterizados da fase inicial da ocupação da Idade do Ferro na Colina do Castelo de São Jorge, em Lisboa (Portugal). Escavações arqueológicas realizadas nesta área urbana permitiram, pela primeira vez, detectar uma sequência clara da ocupação da fase Orientalizante da cidade, que se inicia durante o século VII e se prolonga até ao século V a.C. Os vestígios estratigráficos, arquitectónicos e o espólio recolhido, que integra sobretudo ânforas, produções cinzentas, de engobe vermelho, vasos de fabrico manual e cerâmica comum e pintada, são analisados com detalhe, revelando o profundo carácter orientalizante das populações que se instala…

HOLOCENE CLIMATE AS REFLECTED BY A MALACOLOGICAL SEQUENCE AT VERRIERES FRANCE

2008

Though numerous analyses have been made of Holocene pollen sequences, they come from similar environmental contexts, mainly peat deposits. Land snails can provide good palaeoecological and palaeoclimatical data in different drier environmental settings. The Verrieres deposits, located in the Seine Valley, southeast of Paris, provide rich and abundant malacofaunas. We compare the well–defined local biostratigraphy with other mollusc stratigraphies from Burgundy, the closet site to the studied region. Multivariate analysis of the malacofaunas indicates that temperature and moisture did not always vary in parallel during the Holocene. On the other hand, Verrieres malacofaunas reflect the main …

Per una storia illustrata dell'architettura

2007

Intraocular Telescopic System Design: Optical and Visual Simulation in a Human Eye Model

2016

Purpose. To design an intraocular telescopic system (ITS) for magnifying retinal image and to simulate its optical and visual performance after implantation in a human eye model. Methods. Design and simulation were carried out with a ray-tracing and optical design software. Two different ITS were designed, and their visual performance was simulated using the Liou-Brennan eye model. The difference between the ITS was their lenses’ placement in the eye model and their powers. Ray tracing in both centered and decentered situations was carried out for both ITS while visual Strehl ratio (VSOTF) was computed using custom-made MATLAB code. Results. The results show that between 0.4 and 0.8 mm of d…