Banca de QUALIFICAÇÃO: JULIANA LIVIAN LIMA DE ABREU
Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.DISCENTE : JULIANA LIVIAN LIMA DE ABREU
DATA : 25/07/2019
HORA: 08:30
LOCAL: ICA -UFRA
TÍTULO:
- Analysis of the anatomical structure and chemical composition of tropical woods with different years of storage in a mining area.
PALAVRAS-CHAVES:
DETERIORATION. ANATOMY. STORAGE. DENSITY. CHEMICAL COMPOSITION
PÁGINAS: 44
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
RESUMO:
Among the stages of the mining activity, the vegetation suppression generates an expressive amount of logs from large areas that were suppressed for the excavation activity. These woods are commonly stacked in open-air storage yards in the areas of the enterprise, being exposed to the most varied weather, favoring the process of degradation. In this way this work aims to analyze possible changes in the anatomical structure and variations in the chemical composition of these woods during the storage period. For this purpose samples of wood logs were collected in storage yards in a Bauxite holding area, in the municipality of Paragominas. Six forest species were selected with the highest frequency in the wood piles, allocated in patios with eight, six, four, two and less than one year of storage (2009 to 2017): Aspidosperma desmanthum, Jacaranda copaia, Astronium lecointei, Caryocar villosum, Tetragastris altissima and Pouteria sp. being collected three replications per year of stacking, totalizing 81 samples. Part of these woods are being subjected to macro and microscopic analysis using the usual techniques in the Laboratory of Technology of Forest Products of the Federal Rural University of Amazonia for observations of the anatomical structure, as well as to procedures of determination of basic density, part of this material is also being prepared for analysis of the elemental chemical composition and extract content that will be realized at the Federal University of Lavras. Alterations in the wall structure of the potting elements and in the cell wall of the fibers were observed in macerated material of wood with a longer storage time (eight years)
MEMBROS DA BANCA:
Externo à Instituição - ALISSON RODRIGO SOUZA REIS - UFPA
Externo ao Programa - 2366025 - GRACIALDA COSTA FERREIRA
Interno - 2410727 - LINA BUFALINO
Presidente - 1550131 - MARCELA GOMES DA SILVA
Externo ao Programa - 388496 - SUEO NUMAZAWA