824 resultados para Gran Canaria, Isla de
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[EN] Forested Tamarix L. species found in the Canary Islands as in the Western Mediterranean Basin and the Saharo-Arabian area are included in the class Nerio-Tamaricetea within the order Tamaricetalia africanae order recognized by the Canaries that does not include Tamarix africana Poir., and the halophilic and halotolerant their communities are included in the alliance Tamaricion boveano-canariensis with the new partnership Atriplici ifniensis Tamaricetum canariensis endemic to the Canary Islands, which is also poor in the characteristic species of the class and to be defined almost exclusively for Tenerife requires a broader review.
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[ES] Sin duda, conocer la opinión que los usuarios tienen de la biblioteca será uno de lospuntos más importantes a potenciar con la llegada del nuevo siglo, pues se convertiráen uno de los elementos claves para llevar a cabo un proceso de gestión de calidad. De ahí la importancia de que se desarrolle el uso de encuestas, entrevistas, etc. que sigan las recomendaciones establecidas en las norma ISO 11620 y en las directricesde la IFLA, pues de esta forma podremos establecer comparaciones con otros centros de las mismas características, así como observar los procesos de mejora denuestra biblioteca. Con este trabajo hemos querido tener un primer contacto con el sector de la comunidadde la Universidad de Las Palmas de Gran Canaria que mayor uso hace de labiblioteca: los estudiantes, centrándonos únicamente en conocer el uso y la valoración que estos usuarios tienen de la Biblioteca General.
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[EN]This study presents the evaluation of seven pharmaceutical compounds belonging to different commonly used therapeutic classes in seawater samples from coastal areas of Gran Canaria Island. The target compounds include atenolol (antihypertensive), acetaminophen (analgesic), norfloxacin and ciprofloxacin (antibiotics), carbamazepine (antiepileptic) and ketoprofen and diclofenac (anti-inflammatory). Solid phase extraction (SPE) was used for the extraction and preconcentration of the samples, and liquid chromatography tandem mass spectrometry (LC-MS/MS) was used for the determination of the compounds. Under optimal conditions, the recoveries obtained were in the range of 78.3% to 98.2%, and the relative standard deviations were less than 11.8%. The detection and quantification limits of the method were in the ranges of 0.1–2.8 and 0.3–9.3 ng·L−1, respectively. The developed method was applied to evaluate the presence of these pharmaceutical compounds in seawater from four outfalls in Gran Canaria Island (Spain) during one year. Ciprofloxacin and norfloxacin were found in a large number of samples in a concentration range of 9.0–3551.7 ng·L−1. Low levels of diclofenac, acetaminophen and ketoprofen were found sporadically.
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Programa de doctorado: Avances en Traumatología, Medicina del Deporte y Cuidados de Heridas.
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Universidad de las Palmas de Gran canaria. Departamento de Biología. Unidad de Ecosistemas Litorales
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Máster en Oceanografía
Aguas de abasto en explotaciones avícolas de Gran Canaria: parámetros físicos indicadores de calidad