Results 31 to 40 of about 70,360 (111)

Calcium fluxes in Hoplosternum littorale (tamoatá) exposed to different types of Amazonian waters. [PDF]

open access: yes, 2019
Os peixes que vivem na Amazônia são expostos a vários tipos de água: águas pretas, contendo grande quantidade de carbono orgânico dissolvido, águas brancas, com concentração de Ca2+ dez vezes maior que as águas pretas e pH neutro, e águas claras, com ...
CHAGAS, E. C.   +11 more
core  

Aiouea riedeliana comb. nov. (Lauraceae) from Brazil, with an amended description and provisional extinction threat assessment

open access: yesNordic Journal of Botany, Volume 2026, Issue 10, October 2026.
Aiouea riedeliana (Kosterm.) P.L.R.Moraes and Brotto is the new combination for Cinnamomum riedelianum Kosterm., whose type‐bringing synonym is Persea riedelii Meisn. The placement of this taxon in Aiouea is presented, justified, and illustrated here, disagreeing with its previous classification in Ocotea, as Ocotea riedeliana (Kosterm.) Kottaim., then
Pedro Luís Rodrigues de Moraes   +2 more
wiley   +1 more source

O povo das águas pretas: o caboclo amazônico do rio Negro The people of the black waters: the Amazon caboclo of the Negro river

open access: yesHistória, Ciências, Saúde: Manguinhos, 2007
Apresenta uma descrição historicamente contextualizada do povo que vive ao longo do rio Negro, afluente brasileiro da bacia do Amazonas. Processos de constituição da população e das comunidades são identificados, nas fontes, a partir da experiência ...
Fernando Sergio Dumas dos Santos
doaj   +1 more source

The effect of seawater hardness on cotton fabric dyeing using reactive blue dye

open access: yesColoration Technology, Volume 142, Issue 4, Page 583-594, August 2026.
Abstract Oceans are an abundant source of water; their economic potential has not yet been fully exploited. In this context, the current study aims to apply seawater in the dyeing of cotton fabrics, evaluating the influence that total hardness has on the process results.
Iêda Letícia de Souza Ferreira   +5 more
wiley   +1 more source

Águas minerais de Santa Catarina [PDF]

open access: yes, 2000
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico.Esta pesquisa representa uma análise hidrogeológica das águas minerais de Santa Catarina. Em função de suas características físico-químicas, modo de ocorrência e relações
Coitinho, João Batista Lins
core  

Pesquisas arqueológicas no lago de Silves (AM)

open access: yes, 1987
O lago de Silves ou Saracá está localizado à margem esquerda do médio rio Amazonas, no município de ltacoatiara (AM), formado pelo represamento natural da foz do rio Urubu e alimentado por diversos de seus afluentes, como os rios Anibá e Sanabani-Itabani,
Mario F. Simões   +3 more
core   +1 more source

Uso de indutores de enraizamento em estacas semilenhosas de Hibisco (Hibiscus rosa-sinensis L.)

open access: yesOrnamental Horticulture, 2007
Hibiscus rosa-sinensis L., pertence à família Malvaceae, originário da Ásia tropical, é um arbusto fibroso e lenhoso, de 3-5 m de altura, que não tolera geadas. Possui formas de folhas estreitas, variegadas ou não, sendo suas flores pequenas, solitárias,
Christian Buscher Von Teschenha Eberlin   +2 more
doaj   +1 more source

Stemflow Dynamics in the Jamari National Forest (Brazilian Amazon): I. The Role of Tree Structure

open access: yesBiotropica, Volume 58, Issue 3, May 2026.
A portion of rainfall that contacts tree canopies is drained down tree stems as stemflow. Stemflow is an underexamined component of rainfall partitioning in tropical forests. To investigate how tree canopy structural attributes influence stemflow in the Brazilian Amazon, we measured stemflow, rainfall, and dendrometric parameters of 56 trees in the ...
Jeferson Alberto de Lima   +5 more
wiley   +1 more source

Use of the flooded forest by fish assemblages in lakes of the National Park of Anavilhanas (Amazonas, Brazil) Uso do igapó por assembléias de peixes nos lagos no Parque Nacional das Anavilhanas (Amazonas, Brasil)

open access: yesActa Amazonica, 2012
We evaluated diversity and distribution of fish species in two habitats: flooded forest and open water of lakes of Rio Negro. Each of four lakes within the Anavilhanas Archipelago was sampled three times from 2009-2010.
Janette Noveras   +2 more
doaj   +1 more source

Stemflow Dynamics in the Jamari National Forest (Brazilian Amazon): II. Solute Concentrations and Flux Dynamics

open access: yesBiotropica, Volume 58, Issue 2, March 2026.
Trees can redirect large volumes of rainwater to the base of their stems. This stemflow not only redistributes water but also channels canopy‐derived solutes to the forest floor. Building on research showing canopy geometry and bark properties govern stemflow volumes, we examined how those same traits modulate the biogeochemical side of this flux. Over
Jeferson Alberto de Lima   +5 more
wiley   +1 more source

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