Results 21 to 30 of about 64,518 (254)

Medio siglo de cambios paisajísticos en la montaña mediterránea. Percepción y valoración social del paisaje en la alta Garrotxa (Girona)

open access: yesPirineos: Revista de Ecología de Montaña, 2009
El despoblamiento rural y el abandono de la actividad agraria han originado una intensa transformación de los paisajes característicos de las montañas mediterráneas.
J. Vila Subirós   +3 more
doaj   +1 more source

Dinámica erosiva y aplicabilidad de modelos físicos de erosión en una cuenca de montaña mediterránea (Ribera Salada, Cuenca del Segre, Lleida, España)

open access: yesPirineos: Revista de Ecología de Montaña, 2000
[fr] On étudie la dynamique d'érosion de la surface du sol dans quelques versants de montagne de la source de la Ribera Salada (bassin du Sègre) en testant les modèles EROSION2D et EUROSEM. Trois usages du sol ont été différenciés: (1) Sous-bois du chêne
J. M. Verdú, R. J. Batalla, R. Mª Poch
doaj   +1 more source

Chemical Survey of Three Species of the Genus Rauhia Traub (Amaryllidaceae)

open access: yesPlants, 2022
Plant biodiversity is an important source of compounds with medicinal properties. The alkaloid galanthamine, first isolated from Galanthus woronowii (Amaryllidaceae), is approved by the FDA for the palliative treatment of mild to moderate Alzheimer’s ...
Luciana R. Tallini   +7 more
doaj   +1 more source

Monitorizacion de los cambios de uso del suelo en la cabecera de cuenca de la ribera salada mediante fotografía aérea y S.I.G. (El Solsonès, Lleida, España)

open access: yesPirineos: Revista de Ecología de Montaña, 1999
[es] Durante estos últimos 50 años ha tenido lugar un abandono de las masías y de los cultivos tradicionales en los Prepirineos catalanes. En este trabajo se han estudiado los cambios de usos del suelo desde los años 50 hasta la actualidad en una cuenca
J. M. Ubalde, J. Rius, R. M. Poch
doaj   +1 more source

Issues in System Boundary Definition for Substance Flow Analysis: The Case of Nitrogen Cycle Management in Catalonia

open access: yesThe Scientific World Journal, 2001
The great complexity of the nitrogen cycle, including anthropogenic contributions, makes it necessary to carry out local studies, which allow us to identify the specific cause-effect links in a particular society. Models of local societies that are based
Jordi Bartrola   +2 more
doaj   +1 more source

Cryo-transmission Electron Microscopy of Outer-inner Membrane Vesicles Naturally Secreted by Gram-negative Pathogenic Bacteria

open access: yesBio-Protocol, 2019
A protocol was developed to visualize and analyze the structure of membrane vesicles (MVs) from Gram-negative bacteria. It is now accepted that these micrometric spherical vesicles are commonly produced by cells from all three domains of life, so the ...
Lidia Delgado   +4 more
doaj   +1 more source

Vascular flora associated to Mediterranean temporary ponds on the island of Minorca

open access: yesAnales del Jardín Botánico de Madrid, 2008
Mediterranean temporary ponds are a habitat with a high interest for conservation due to their particular characteristics and especially to their biodiversity. Vascular flora is a feature that stands out for its richness and diversity. Minorca has a high
Pere Fraga i Arguimbau
doaj   +1 more source

Ophrys x castroviejoi (Orchidaceae), a new hybrid for Spain.

open access: yesAnales del Jardín Botánico de Madrid, 2012
Ophrys x castroviejoi is described and illustrated; it is a hybrid of O. scolopax and O. speculum, wich was obtained artificially in 1931 and named as O. x kelleriella, considered nomen nudum. It is offered its known distribution and current situation in
Lluís Serra Laliga, Jaume X. Soler
doaj   +1 more source

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