Results 11 to 20 of about 50,085 (225)

Physicochemical characteristics of organic honey samples of africanized honeybees from Paraná River islands. [PDF]

open access: yes, 2011
This research was carried out to evaluate the physicochemical composition of organic honey in Paraná River islands, in Porto Brasílio, State of Paraná. Honey was harvested directly from super of the colonies in three apiaries spread in the Floresta and ...
Alves, Eloi Machado   +6 more
core   +3 more sources

Sedimentary Mercury Enrichments as a Tracer of Large Igneous Province Volcanism

open access: yesGeophysical Monograph Series, Page 247-262., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Lawrence M. E. Percival   +3 more
wiley  

+5 more sources

Behavioral aspects and predation of seeds of Cardiospermum grandiflorum Swartz (Sapindaceae) by Cissoanthonomus tuberculipennis Hustache (Coleoptera: Curculionidae) [PDF]

open access: yes, 2013
For the first time in Brazil, the weevil Cissoanthonomus tuberculipennis Hustache, 1939 (Coleoptera: Curculionidae) are reported preying on seeds of Cardiospermum grandiflorum Swartz (Sapindaceae).
Lampert, Silvana   +3 more
core   +2 more sources

Occurrence and toxicity of Microcystis aeruginosa (Cyanobacteria) in the Paraná River, downstream of the Yacyretá dam (Argentina) [PDF]

open access: yes, 2016
Cyanobacteria constitute the main toxin producers in inland water ecosystems and have extensive global distribution. The presence of hepatotoxins in aquatic environments is hazardous to human and animal health; even though the presence and identification
Andrinolo, Dario   +3 more
core   +3 more sources

Microlobiusxylon paranaensis gen. et sp. nov. (fabaceae, mimosoideae) from the pliocene-pleistocene of ituzaingó formation, paraná basin, Argentina [PDF]

open access: yes, 2010
A fossil wood with Fabaceae affinity from the Pliocene-Pleistocene sediments of Ituzaingó Formation is described. The silicified wood was collected at the Toma Vieja fossil locality, Paraná Basin, Argentina.
Brea, Mariana, Franco, María Jimena
core   +1 more source

Check list of ground-dwelling ant diversity (Hymenoptera: Formicidae) of the Iguazú National Park with a comparison at regional scale [PDF]

open access: yes, 2015
We describe the ant fauna of Iguazú National Park (INP), a region of high biodiversity andendemism in northeastern Argentina that includes the southernmost protected area ofthe Atlantic Forest (AF).
Achury, R.   +6 more
core   +2 more sources

Preliminary study on effect of agricultural activities in pollen spectrum of argentinean honey [PDF]

open access: yes, 2019
Honey floral origin is determined by the harversting region, but anthropogenic factors as agriculture expansion might modify the environmental flora and consequently honey floral origin.
Fagundez, Guillermina Andrea   +2 more
core   +2 more sources

Nuevas citas en Mimosa (Mimosoideae, Leguminosae) para la flora brasilera.

open access: yesBoletín de la Sociedad Argentina de Botánica, 2015
Nuevas citas en Mimosa (Mimosoideae, Leguminosae) para la flora brasilera. Se citan por primera vez para Brasil cinco especies de Mimosa: M. strigillosa, M. leimonias, M. petraea, M. oligophylla, y M. barnebiana.
Matías Morales   +2 more
doaj   +1 more source

Meiotic behavior during microsporogenesis of Alchornea triplinervia (Sprengel) Müller Argoviensis Comportamento meiótico durante a microsporogênese de Alchornea triplinervia (Sprengel) Müller Argoviensis

open access: yesCiência Rural, 2012
The Alchornea triplinervia specie belongs to the Euphorbiaceae family, one of the main families of the Brazilian flora. In order to contribute to a better understanding of the specie, a counting of chromosome number and the microsporogenesis analysis of ...
Sara Mataroli de Godoy   +3 more
doaj   +1 more source

O gênero Zygostates (Orchidaceae: Oncidiinae) no estado do Paraná, Brasil

open access: yesRodriguésia
Resumo Zygostates consiste de ca. 26 espécies, das quais 15 ocorrem no Brasil. Através de consultas a herbários nacionais e estrangeiros, além da realização de trabalho de campo, oito espécies de Zygostates foram encontradas no Paraná: Zygostates ...
Carla Adriane Royer   +2 more
doaj   +1 more source

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