Results 81 to 90 of about 739,498 (287)

Middle Ordovician conodonts and graptolites at Los Cauquenes range, central Precordillera of San Juan, Argentina [PDF]

open access: yes, 2013
The Ordovician System is superbly represented in the Precordillera of western Argentina, at the Andean foothills. During the Middle Ordovician, an important paleogeographical rearrangement of depocenters and source areas took place associated with the ...
Albanesi, Guillermo Luis   +2 more
core  

Osteosclerosis in the extinct Cayaoa Bruneti (Aves, anseriformes) : insights on behavior and fligftlessness [PDF]

open access: yes, 2015
Fil: Mendoza, Ricardo de. División Paleontología Vertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La PlataFil: Tambussi, Claudia Patricia. Centro de Investigaciones en Ciencias de la Tierra (CICTERRA).
Berlepsch H.G.   +15 more
core   +1 more source

Darwin, el Planeta Tierra, las otras tierras y los profesores de ciencias

open access: yesContextos Educativos. Revista de Educación, 2013
Las conmemoraciones ofrecen oportunidades didácticas. En 2009 han coincidido las referidas a Darwin y a Galileo, que casi han solapado con la declaración de 2008 como el Año Internacional del planeta Tierra. Aparentemente heterogéneas, estas celebraciones presentan un hilo conductor común, útil para una reflexión de fondo sobre la enseñanza de la ...
openaire   +3 more sources

Methodological guide for ethnobotanical study of forest species in Amazonian and related communities

open access: yesRevista Cubana de Ciencias Forestales, 2019
The ethnobotanical study is carried out due to the accelerated loss of traditional knowledge, forest degradation and natural habitats in Amazonian communities.
Yoel Rodríguez Guerra   +3 more
doaj  

CIENCIAS DE LA TIERRA [PDF]

open access: yes, 2017
GUÍA DE EVALUACIÓN DEL ...
GUERRERO PEÑUELAS ADRIANA GUADALUPE   +1 more
core   +1 more source

Las redes de teleflujos y su estructuración territorial en España: Los flujos telefónicos.

open access: yesEstudios Geográficos, 1990
El objetivo fundamental del trabajo es analizar la configuración del territorio español en grandes áreas a partir de la interacción espacial de los flujos telefónicos.
Joana María Seguí Pons   +2 more
doaj   +1 more source

Along the Silenced Footsteps of Latin American Pastoralists: From Mexico to Argentina, a Journey Through Pastoral Systems in Latin America

open access: yesThe Journal of Latin American and Caribbean Anthropology, Volume 31, Issue 1, March 2026.
ABSTRACT Pastoralism worldwide faces a complex landscape of increased pressures and exclusion. Beyond ecological and economic challenges, pastoralists suffer eroding cultural identity, limited generational renewal, and political marginalization. Yet pastoral livelihoods are increasingly recognized as stewards of sustainable futures and amongst the best
Greta Semplici, Pablo Manzano
wiley   +1 more source

The fluctuating resource hypothesis explains invasibility, but not exotic advantage following disturbance [PDF]

open access: yes, 2018
Invasibility is a key indicator of community susceptibility to changes in structure and function. The fluctuating resource hypothesis (FRH) postulates that invasibility is an emergent community property, a manifestation of multiple processes that cannot ...
Cock, Marina Cecilia   +6 more
core   +2 more sources

In Situ, Real‐Time Imaging of pH Gradients and Solution Flows through Silica Garden Membranes during Tube Growth

open access: yesSmall, Volume 22, Issue 9, 12 February 2026.
A fluorescent pH probe, added to a saturated metal ion solution, allows for mapping pH during the growth of a silica garden. The probe shows a very intense blue fluorescence at pH around 4 and an intense green fluorescence at pH above 6. The red component of the image allows detection of the formation of particles and tracking solution flows in the ...
Arianna Menichetti   +5 more
wiley   +1 more source

Estudio de la presencia de la Geología en currículos oficiales autonómicos de Educación Primaria [PDF]

open access: yes, 2018
El trabajo analiza los contenidos relacionados con las Ciencias de la Tierra presentes en currículos oficiales autonómicos de Educación Primaria. Se pretende conocer si la presencia de estos contenidos y su secuenciación son coherentes con los principios
Calonge García, Mª Amelia   +1 more
core   +1 more source

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