Results 251 to 260 of about 99,309 (283)

Bone lead in the prehistoric population of Gran Canaria [PDF]

American Journal of Human Biology, 1999
The present study determined the lead concentration in bone tissue from 40 prehistoric individuals of Gran Canaria, and in a sample of 19 modern day residents of the Canary Islands. Higher bone lead values were observed in the modern sample (18.65 +/- 12.13 &mgr;g/g dry bone tissue) than in the ancient sample (4.41 +/- 3.45 &mgr;g/g dry bone tissue, P <
Javier Velasco-Vázquez, M. Arnay-de-la-Rosa, Emilio González-Reimers, E. Delgado-Ureta, Francisco Santolaria-Fernández, L. Galindo-Martín   +5 more
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Auricular exostoses in the prehistoric population of Gran Canaria

American Journal of Physical Anthropology, 2000
Auditory exostoses are bone anomalies located in the external auditory canal. The bulk of clinical observations and some experimental data support the idea that their development depends on prolonged exposure to cold water. This study was performed in order to analyze the prevalence of auditory exostoses among the prehispanic population of Gran Canaria,
M. Arnay-de-la Rosa, A. Betancor-Rodriguez, Javier Velasco-Vázquez, Emilio González-Reimers   +3 more
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Commissioning instrument for the Gran Telescopio Canarias

SPIE Proceedings, 2003
During the GTC integration phase, the Commissioning Instrument (CI) will be a diagnostic tool for performance verification. The CI features four operation modes-imaging, pupil imaging, Curvature WFS, and high resolution Shack-Hartmann WFS. After the GTC Commissioning we also plan to install a Pyramid WFS.
Ariel Dorantes, C. Espejo, Alejandro Farah Simon, Luis Cavaller, Rafael Toral, F. Cobos, Salvador Cuevas, Juan Manuel Montoya, Carlos Tejada, R. Flores-Meza, Javier Castro, José Luis Gonzalez, F. Garfias, O. Chapa, Sadot Arciniega, Beatriz Sánchez, Nicholas Devaney, Gerardo Lara, Roberto Nava, Hugo Hernández, V. Bringas, Javier Godoy, Armando Chavoya, Gustavo Anguiano   +23 more
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Adaptive optics for the Gran Telescopio Canarias

SPIE Proceedings, 1998
It is foreseen that the Gran Telescopio Canarias will include an Adaptive Optics (AO) system to provide diffraction-limited images in the near-IR. The preliminary scientific requirements are presented here and are used to determine the basic system specifications. The sky coverage is determined for the cases of natural and laser guide stars.
James Keen, C. Delores Bello, Nicholas Devaney, Lotti Jochum   +3 more
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Global model of the Gran Telescopio Canarias

SPIE Proceedings, 2002
During the conceptual design of the GTC (Gran Telescopio Canarias) it was suggested to develop a Global Model of the behaviour of the GTC system to be used as a tool for the system engineering. This Global Model should be a dynamical simulation capable to predict the pointing, tracking, guiding and image quality of the GTC system in several simulation ...
F. Javier Castro Lopez-Tarruella, Jose M. Fernandez Ibarz   +1 more
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The Gran Telescopio Canarias (GTC) project

New Astronomy Reviews, 1998
Abstract The outstanding quality of the Canarian sky, protected by law, makes it feasible to install the largest telescopes in the world at the observatories of the Instituto de Astrofisica de Canarias (IAC), which has promoted the design and construction of the Gran Telescopio Canarias (GTC).
F Sánchez, J. M. Rodríguez Espinosa, P. Alvarez   +2 more
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Ignimbrite sequence on Gran Canaria

Bulletin Volcanologique, 1969
The Miocene sequence of felsic extrusive rocks of about 1000 m total thickness on Gran Canaria is divided into three units: a) A lower unit of trachytic rhyolites (lavas, composite flows, ignimbrites) characterized by a phenocryst assemblage of anorthoclase (Or15–20, wt%), clinopyroxene, hypersthene (amphibole substituted for both in ignimbrites),
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Sources of PM2.5 impacting on Gran Canaria, Spain

CATENA, 2014
2 ...
Inmaculada Menéndez, Edward Derbyshire, Johann Engelbrecht   +2 more
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The Occurrence of Mycoplasmas in the Lungs of Swine in Gran Canaria (Spain)

Veterinary Research Communications, 2005
The study was conducted to investigate the mycoplasmal flora in the lungs of pigs with enzootic pneumonia at Gran Canaria (Spain). From 54 pneumonic lungs collected at an abattoir, 85 isolates were cultivated. On the basis of cultural and biochemical characteristics, the isolates were preliminarily identified as Mycoplasma species.
P. Assunção, C. de la Fe, B. Kokotovic, O. Gonzalez, José B. Poveda   +4 more
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The tahitites of gran canaria and haüynitization of their inclusions

Bulletin Volcanologique, 1969
Na-alkaline lavas of the eruptions related to two centers of emission (Montana Arucas and Montana Cardones), on the northern coast of the Grand Canaria island, are described in detail as well as their relationships with the other volcanic formations of the area. It is concluded that they are of Tyrrhenian age.
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