Growth Rings
Mostrando 1-12 de 128 artigos, teses e dissertações.
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1. Structural Characteristics of Lignite Char from Different Pyrolysis Reactors and the Influence on Their Gasification Reactivity
The gasification reactivity of coal char is affected by numerous experimental variables, and char structure is one of the dominant factors. In this work, Raman spectroscopy, powder X-ray diffraction (XRD), and N2 adsorption were used to investigate the physical and chemical structure of char prepared under different pyrolysis conditions. Three kinds of pyrol
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Climatic signal in a radial growth of Canadian and Maximovich poplars in south-western Poland
ABSTRACT: The main goal set by researchers in this article was to gather knowledge on the structure of the basic biometric features of tree-rings of two species of poplars, belonging to different sections of Aegeiros – Populus xcanadensis and Tacamahaca – Populus maximowiczii, and to define and understand the correlation between weather and annual increm
Sci. agric. (Piracicaba, Braz.). Publicado em: 20/12/2019
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3. First record of growth rings for 11 native subtropical anuran species of South America
Abstract: Skeletochronology is the most accurate method to estimate a population age structure. The methodology is based on the analysis of secondary bone tissue in order to count growth rings. This study aimed to provide initial data, allowing researchers to further work out in the age of individuals and populations, sampling evidence of the presence of gro
An. Acad. Bras. Ciênc.. Publicado em: 02/12/2019
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4. Dendroecologia de Gymnanthes klotzschiana Müll. Arg. em um remanescente de Floresta Ombrófila Mista Aluvial no Sul do Brasil
Resumo Em um remanescente de Floresta Ombrófila Mista Aluvial, foram abatidas 56 árvores adultas de Gymnanthes klotzschiana, árvore típica e representativa desta formação e popularmente conhecida como branquilho, às margens do rio Barigui, em Araucária - PR, o qual teve o curso de seu leito retificado na década de 1960. Considerando-se as técnicas
Ciênc. Florest.. Publicado em: 02/12/2019
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5. Diametric Growth of Tree Species in the Atlantic Forest, Paraná, Brazil
Abstract: Management of remnants in Atlantic Forest is an alternative for their conservation, however, information on the growth and ecology of those species is lacking. This study aimed to describe diametric growth of Balfourodendron riedelianum, Cordia trichotoma and Ocotea diospyrifolia based on its growth rings and to verify the relationship between this
An. Acad. Bras. Ciênc.. Publicado em: 11/11/2019
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6. Assessment of the dendrochronological potential of Licaria bahiana Kurz, an endemic laurel of lowland Atlantic forests in Brazil
ABSTRACT The Atlantic Forest of southeastern Brazil has been considered to have the highest number of tree species per hectare in the world. Assessing the influence of climate on tropical tree species is a priority in the face of ongoing climate change, and for which dendrochronological studies have been important. We address the dendrochronological potentia
Acta Bot. Bras.. Publicado em: 12/09/2019
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7. Dendroclimatologia na Amazônia: aplicações e potencialidades
Resumo Os efeitos de mudanças climáticas na Amazônia podem ser estudados por meio da dendroclimatologia, a partir da análise das relações entre as variáveis climáticas e meteorológicas e o crescimento do xilema de espécies arbóreas. O xilema constitui um verdadeiro arquivo natural porque permite o registro dessas variáveis na madeira, o que pode
Ciênc. Florest.. Publicado em: 30/05/2019
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8. NEAR INFRARED SPECTROSCOPY: RAPID AND ACCURATE ANALYTICAL TOOL FOR PREDICTION OF NON-STRUCTURAL CARBOHYDRATES IN WOOD
ABSTRACT The non-structural carbon reserves in the various organs of trees are associated with their growth and the mechanism of resilience when exposed to environmental stresses, especially the water deficit. The goal of this study was to develop multivariate models to estimate the amount of non-structural carbohydrates (starch, sucrose, reducing sugars, to
CERNE. Publicado em: 20/05/2019
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9. Resistência mecânica à adesão em superfícies de madeira de pinus aplainadas e unidas por adesivos PVAc
RESUMO Este trabalho teve como objetivo analisar o desempenho de juntas coladas de madeiras da espécie Pinus elliottii com a utilização de dois adesivos comerciais à base de poliacetato de vinila (PVAc), com diferentes características físicas e composição química, ambos testados nas formas diluída em água e não diluída. As superfícies dos corpo
Matéria (Rio J.). Publicado em: 20/05/2019
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10. Fire records in tree rings of Moquiniastrum polymorphum: potential for reconstructing fire history in the Brazilian Atlantic Forest
ABSTRACT Fire disturbance affects the composition, structure and dynamics of vegetation. Historical records of fire events exist in some places, but they are generally limited in temporal and spatial extent. Tree-ring research is a useful tool for fire history reconstruction and can contribute important long-term ecological data. We tested the hypotheses tha
Acta Bot. Bras.. Publicado em: 29/11/2018
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11. Safflower root and shoot growth affected by soil compaction
ABSTRACT Safflower (Carthamus tinctorius L.) is a commercial seed crop grown for its good yield of high-quality oil. It is tolerant to water stress but may be sensitive to soil compaction. The aim of this study was to assess safflower growth under different degrees of soil compaction at depths of 0.15 m to 0.20 m. The experiment was carried out in PVC pots c
Bragantia. Publicado em: 23/04/2018
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12. Experimental exploratory study of failure modes in models of wooden rectangular beams of Hymenae spp
ABSTRACT According to the study of mechanical properties, wood is an elastic or elastoplastic material that presents different structural behaviour when tensioned or compressed. From the viewpoint of elasticity, wood is considered anisotropic, or rather it is a material with elastic properties that vary with the direction considered. During tree growth, the
Matéria (Rio J.). Publicado em: 05/03/2018