Results 51 to 60 of about 438,575 (168)

Effects of torrefaction on energy properties of Eucalyptus grandis wood [PDF]

open access: yes, 2009
Torrefaction is a thermal treatment that promotes homogenization and improvement of energy properties of biomass. This study aims to evaluate the effects of torrefaction on the main energy properties of Eucalyptus grandis wood.
Oliveira Rodrigues, Thiago   +1 more
core  

Análise das propriedades micro e macroscópias de material restaurador odontológico fotopolimerizável submetido a direrentes condições no processo de reticulação [PDF]

open access: yes, 2002
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Gradução em Ciência e Engenharia de Materiais.A estética dentária é um fator que nos dias atuais vem cada vez mais sendo requerido por parte dos ...
Luiz, Betsy Kilian Martins
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Herschel observations of interstellar chloronium [PDF]

open access: yes, 2012
Using the Herschel Space Observatory's Heterodyne Instrument for the Far-Infrared (HIFI), we have observed para-chloronium (H2Cl+) toward six sources in the Galaxy.
Aage Sandqvist   +42 more
core   +5 more sources

Avaliação do modelo CANEGRO/DSSAT para quatro cultivares de cana-de-açúcar. [PDF]

open access: yes, 2020
A parametrização do modelo DSSAT/CANEGRO para a realidade brasileira é de grande importância para a obtenção de uma ferramenta para o monitoramento de safras agrícolas e para a elaboração de cenários agrícolas futuros.
DONZELLI, J. L.   +7 more
core  

A geographic and social profile of Italy's great migration (1876–1913)

open access: yesInternational Migration, Volume 63, Issue 3, June 2025.
Abstract This article sheds light on Italian emigration flows with a focus on their geographical origins in the late 19th and early 20th centuries, that is, during the so‐called Great Migration. Annual province‐level data on Italian emigration are analysed in order to reconstruct the regional origins of emigrants, the factors motivating their decisions,
Francesca Fauri, Giancarlo Gasperoni
wiley   +1 more source

Phenotypic, Floristic, and Anthropogenic Drivers of the Pollen Niche of Amazonian Stingless Bees

open access: yesBiotropica, Volume 57, Issue 3, May 2025.
The pollen diversity and composition collected by Amazonian stingless bees depend on their body mass, tree composition, and urbanization. Further, bees have been collecting fewer pollen types since the 1970s. ABSTRACT Stingless bees (Apidae: Meliponini) are major pollinators in the tropics, supporting key ecosystem services.
Daniel Bastos Pimenta   +3 more
wiley   +1 more source

Avaliação de método expedito para determinação de massa seca de adubos verdes em experimentos participativos. [PDF]

open access: yes, 2017
As espécies leguminosas desempenham papel relevante na produção agrícola, exercendo múltiplas e importantes funções em sistemas de produção agroecológica, podendo ser utilizadas como culturas de cobertura, adubos verdes, pasto apícola, refugio de ...
BORSATO, A. V.   +2 more
core  

Kuwae, Epi and Tongoa Islands: Transformations of a volcanic landscape in central Vanuatu

open access: yesArchaeology in Oceania, Volume 60, Issue 1, Page 42-62, April 2025.
ABSTRACT This paper presents a detailed overview of archaeological research undertaken on Epi and Tongoa, in central Vanuatu. These islands were previously connected to one another and respectively formed the western and eastern portions of Kuwae, one of the largest islands in the Vanuatu archipelago, until the catastrophic Tombuk volcanic eruption ...
ROBERT HENDERSON   +7 more
wiley   +1 more source

Africa's ungoverned space [PDF]

open access: yes, 2006
A atenção que os EUA, a UE, o G-8 e a NATO têm prestado a África apresenta níveis sem precedentes. É necessário, no contexto político pós 11 de Setembro, reflectir sobre “espaços não governados”.
Whelan, Teresa
core  

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