Results 61 to 70 of about 364,271 (240)

Chromosomal analyses in Megalonema platanum (Siluriformes: Pimelodidae), an endangered species from South American rivers

open access: yesNeotropical Ichthyology, 2011
This study presents chromosomal data of Megalonema platanum from rio Tibagi, Paraná, Brazil and from rio Paraná, Argentina. The diploid number was equal 54 with karyotype composition of 24m+16sm+2st+12a in both populations.
Rafael Augusto de Carvalho   +5 more
doaj  

Chromosomal analyses in Megalonema platanum (Siluriformes: Pimelodidae), an endangered species from South American rivers

open access: yesNeotropical Ichthyology
This study presents chromosomal data of Megalonema platanum from rio Tibagi, Paraná, Brazil and from rio Paraná, Argentina. The diploid number was equal 54 with karyotype composition of 24m+16sm+2st+12a in both populations.
Rafael Augusto de Carvalho   +5 more
doaj   +1 more source

O uso das terras no sul do Brasil: uma análise a partir de indicadores de localização

open access: yesRevista de Economia e Sociologia Rural, 2006
Esse artigo analisa o uso das terras no Paraná, Santa Catarina e Rio Grande do Sul, no período de 1975 a 1995, a partir da análise regional. Foram utilizados indicadores de localização e especialização tendo como variável a área em hectares ocupadas nos ...
Jandir Ferrera de Lima   +7 more
doaj   +1 more source

"Summer school on public policies evaluations methods”. Deliverable D4.5 [PDF]

open access: yes, 2019
The study aimed to analyse the processes of construction, institutionalization and implementation of agroecology and organic agriculture (PEAPO) policies in several federated states of Brazil to identify progress, obstacles and effects of interactions ...
Assis, William   +6 more
core  

Agglomeration externalities and 1981-2006 regional growth in Brazil [PDF]

open access: yes, 2012
This paper focuses on manufacturing employment growth across the 26 states of Brazil. We employ the Glaeser et al. (1992) approach to identify the role played by knowledge externalities in growth and convergence.
Holmes, Mark J.   +3 more
core   +2 more sources

Antimicrobial Residues in a Key Cerrado River: Distribution, Persistence, and Effects on Zebrafish Embryo‐Larval Development

open access: yesEnvironmental Toxicology, EarlyView.
ABSTRACT The current study aimed to quantify the antimicrobials amoxicillin (AMX), cefazolin (CFZ), chloramphenicol (CHL), metronidazole (MTZ), and sulfamethoxazole (SX) in effluents and surface water of an important Cerrado river, calculate their half‐lives, and analyze their ecotoxicity following single and combined exposures.
Náthala Maria Simão   +12 more
wiley   +1 more source

Five new species of genus Astyanax Baird & Girard, 1854 from Rio Iguaçu, Paraná, Brazil (Ostariophysi, Characiformes, Characidae)

open access: yesBrazilian Journal of Biology
Five new species of the Neotropical characiform genus Astyanax Baird & Girard are described from Rio Iguaçu at the border of Paraná and Santa Catarina states, southeastern Brazil and Astyanax gymnogenis Eigenmann is redescribed.
JC. Garavello, FAA Sampaio
doaj   +1 more source

Taxonomic revision of Galeocharax (Characiformes: Characidae: Characinae)

open access: yesNeotropical Ichthyology, 2017
The taxonomy of Galeocharax, a genus of freshwater fishes distributed in most South American cis-Andean river systems, except the rio Negro, rio São Francisco and rio Xingu basins and the eastern drainages of Brazil, is herein revised.
Victor Giovannetti   +2 more
doaj   +1 more source

Post legal positivism: new paradigm of legal science (jurisprudence) and practice in Brazil [PDF]

open access: yes, 2012
The relation between law, moral, society and science is shifting in Brazil as it is changing in democratic contemporary societies. This paper proposes to reflect about this change in the Brazilian legal and social context.
Malheiros da Cunha Frota, Pablo   +1 more
core  

Hevea brasiliensis seeds: A novel sustainable feedstock for ethanol production

open access: yesVietnam Journal of Chemistry, EarlyView.
Abstract The rubber tree (Hevea brasiliensis) is cultivated on a large scale mainly for the extraction of latex in Brazil and Southeast Asia, also generating large quantities of seeds. These seeds currently do not have large‐scale applications and may thus be considered as a residue.
Giovano Tochetto   +4 more
wiley   +1 more source

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