Results 101 to 110 of about 3,610,484 (281)

Dimorphic enantiostyly and its function for pollination by carpenter bees in a pollen‐rewarding Caribbean bloodwort

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Flowers that present their anthers and stigma in close proximity can achieve precise animal‐mediated pollen transfer, but risk self‐pollination. One evolutionary solution is reciprocal herkogamy. Reciprocity of anther and style positions among different plants (i.e., a genetic dimorphism) is common in distylous plants, but very rare in
Steven D. Johnson   +5 more
wiley   +1 more source

Unidad y conflicto. La cuestión de la subjetividad en las lecturas contemporáneas de Kant

open access: yesCiencia, Docencia y Tecnología, 2014
Nuestra investigación ha abordado las encrucijadas teóricas expuestas en el debate acerca de la cuestión de la subjetividad, mediante un recorrido no lineal de lecturas contemporáneas de Kant.
María del Pilar Britos   +5 more
doaj  

Chemical Composition of the Eggs of the Freshwater Turtle Phrynops hilarii (Chelidae: Testudines) [PDF]

open access: yes, 2019
At oviposition, amniote eggs contain all the nutrients required for complete neonate tissue development. For reptiles and birds, the egg yolk is the main embryonic energy source and is composed predominantly of proteins and lipids, while also providing ...
Bernardi, Cecilia Gabriela   +3 more
core  

Caracterización y fenología de especies de interés apícola en el departamento Diamante (Entre Ríos, Argentina)

open access: yes, 2016
Characterization and phenology of species with beekeping interest in the Diamante department (Entre Rios, Argentina). In order to evaluate the bee resources in southwestern region of the province of Entre Rios based on diversity and abundance, spatial ...
G. Fagúndez   +2 more
semanticscholar   +1 more source

Phylogenomics, ecomorphological evolution, and historical biogeography in Deuterocohnia (Bromeliaceae: Pitcairnioideae)

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Species of Deuterocohnia (17 spp.) show extraordinary variation in elevation (0–3900 m a.s.l.) and growth forms, and many have narrow geographic distributions in the west‐central Andes and the Peru‐Chile coast. Previous research using few plastid and nuclear loci failed to produce well‐resolved or supported phylogenies.
Bing Li   +5 more
wiley   +1 more source

Nuestro laboratorio: un lugar y seis momentos para descubrir diferentes facetas del Cálculo Vectorial

open access: yesEl Cálculo y su Enseñanza, 2012
Cálculo Vectorial es una asignatura del segundo año de la carrera de Bioingeniería de la Facultad de Ingeniería de la Universidad Nacional de Entre Ríos, República Argentina.
María Magdalena Añino   +3 more
doaj   +1 more source

Neighborhood social environments and mental health among youth and adults in public housing

open access: yesAmerican Journal of Community Psychology, EarlyView.
Abstract Neighborhoods influence health in part through social processes. However, little is known about how multiple neighborhood social processes co‐occur, or about within (vs. between) neighborhood variation in social processes and health. This study asked how residents of a large public housing development describe their neighborhood and used ...
Jane Leer   +3 more
wiley   +1 more source

Escenarios e innovaciones en el sistema agroindustrial de la provincia de Entre Ríos: aportes desde un enfoque multinivel

open access: yes360
Un futuro sostenible requiere armonizar aspectos productivos, ambientales y sociales. El objetivo de este trabajo es analizar los principales desafíos de innovación tecnológica y social que enfrenta la producción primaria en una provincia agrícola ...
Oscar Valentinuz   +3 more
doaj   +1 more source

A 10,000 Mississippi Kite flock observed in Fuerte Esperanza, Argentina [PDF]

open access: yes, 2006
The Mississippi Kite (Ictinia mississippiensis) is a Neotropical migrant that nests singly or in loose, small colonies in North America from North Carolina and north Florida west to Kansas, southeastern Colorado, and Texas and north along Mississippi ...
Areta, Juan Ignacio, Seipke, Sergio H.
core   +1 more source

Explorando la Variabilidad Petrográfica entre Vasijas Decoradas y Lisas del Sitio La Palmera 2 (Entre Ríos, Argentina): Hacia un Abordaje Microscópico del Arte Cerámico Prehispánico de la Cuenca del Río Paraná

open access: yes, 2016
Este trabajo explora la variabilidad petrografica de un conjunto ceramico procedente de las tierras bajas del Parana medio: especificamente del sitio La Palmera 2 (provincia de Entre Rios, Argentina), con la finalidad de abordar aspectos tecnologicos del
Flavia V. Ottalagano
semanticscholar   +1 more source

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