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| Registros recuperados: 2.975 | |
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| Bunn,H. Franklin; Riggs,Austen. |
| Resumo Hemolisados de 16 espécies de peixes amazônicos foram analisados por focalização elétrica em gel. A mudança do ponto isoelétrico sob desoxigenação proporcionou uma avaliação segura do efeito Bohr. Certas espécies de peixe têm componentes de hemoglobina simples cujo pl aumenta significantemente sob desoxigenação, de modo similar à do homem. Outros peixes tinham hemoglobinas, cujos pontos isoelétricos não eram atingidos pela desoxigenação. Seis espécies de peixe tinham, pelo menos, dois componentes na hemoglobina um dos quais tinha um ponto isoelétrico reduzido sob desoxigenação indicando um efeito Bohr reverso enquanto que outro (s) tinha um ponto isoelétrico aumentado sob desoxigeração como ocorre com o efeito Bohr alcalino normal. Uma correlação... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1978 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671978001100125 |
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| Caires,Claudenir Simões; Gomes-Bezerra,Kadja Milena; Proença,Carolyn Elinore Barnes. |
| The genus Peristethium, characterized by determinate inflorescences protected by deciduous bracts, occurs in the northwest of South America, as well as Costa Rica and Panama. The main objective of this paper was to transfer one species to what we believe is its correct generic placement in Peristethium, that likewise implies in a shift of the genus' distribution beyond the Amazon. A new combination, Peristethium reticulatum, is proposed, based on Struthanthus reticulatus, described from Tocantins in 1980. The sexual dimorphism of the inflorescences of P. reticulatum (sessile male flowers and pedicellate female flowers) associated with male inflorescences that are inserted at leafless nodes are unique within the genus. The male flowers have dimorphic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Floral dimorphism; Leaf architecture; Struthanthus. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000200002 |
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| Pessoa,Felipe Arley Costa; Barbosa,Ulysses Carvalho; Medeiros,Jansen Fernandes. |
| A new species of the genus Cerqueirellum Py-Daniel, 1983 (Diptera: Simuliidae) is described. The adults are similar to the species C. oyapockense (Floch & Abonnenc, 1946) and C. roraimense (Nunes de Mello, 1974), of which the females are similar, and the males present discrete differences. The main differences of this new species to others of the genus Cerqueirellum are the integument of the larva recovered from stout spines and long cephalic trichomes in the pupa. Some females were infected with Mansonella ozzardii (Manson, 1897) (Nematoda, Onchocercidae) and probably transmit mansonelliasis in the Ituxi river, state of Amazonas, Brazil. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazônia; Cerqueirellum; Mansonella ozzardi; Simuliidae; Taxonomy. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000300022 |
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| MELO,Efigenia de; FERREIRA,Carlos Alberto CID; GRIBEL,Rogério. |
| ABSTRACT We describe and illustrate a new species of Coccoloba (Polygonaceae), named Coccoloba gigantifolia, from the Brazilian Amazon. It resembles Coccoloba mollis Casar, but differs from the latter species by its much larger leaves in the fertile branches. The species has only been recorded in the Madeira River basin, in the states of Amazonas and Rondônia, in the central and southwestern Brazilian Amazon. The description was based on herbarium material, cultivated plants, and individual trees in their natural habitat. We provide illustrations, photographs, and an identification key with morphological characteristics that distinguish the new taxon from the other two related taxa of the Coccoloba sect. Paniculatae, as well as comments on the geographic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Taxonomic botany; Amazon rainforest; Geographic plant distribution; Paniculatae. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400324 |
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| Valsko,Jefferson José; Krahl,Amauri Herbert; Holanda,Ana Sofia Sousa de; Zartman,Charles Eugene. |
| Dichaea is the largest genus of the subtribe Zygopetalinae and holds it's the highest species diversity in South America. Therefore, this study aims to describe a new species of Dichaea, which occurs in northern Brazil, Dichaea bragae Valsko, Krahl & Holanda. The new species was collected in the north of Manaus in an area of ombrophilous forest and flowered when cultivated. The epithet honors Dr. Pedro Ivo Soares Braga (in memoriam), orchidologist who conducted several studies in the Brazilian Amazon. This new species show a affinity with Dichaea tenuis C. Schweinf., however it is differentiated both vegetatively and on labellum morphology. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Taxonomy; Amazonas; Epiphyte; Dense ombrophilous forest. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000300014 |
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| OLIVEIRA,Arley Faria José de; ALENCAR,Ronildo Baiatone; FREITAS,Rui Alves de. |
| ABSTRACT Pintomyia (Pifanomyia) duckei Oliveira, Alencar and Freitas sp. n. from Adolpho Ducke Reserve, Manaus, Amazonas state, Brazil, is described and illustrated based on three male specimens, the holotype and two paratypes. The paratypes have abnormalities in the external genitalia, one with asymmetric bilateral anomaly (different anomalies in each of certain paired structures) and the other with unilateral anomaly (anomaly in one of the paired structures). The new species probably belongs to the Serrana Series, integrating the list of the species whose males possess gonostylus with two stout spines (one apical and other subapical), as well as a small and very thin spine on the inner surface of the basal half. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Taxonomy; Anomalous sandflies; Ducke Forest Reserve; Serrana Series. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000300224 |
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| Registros recuperados: 2.975 | |
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