Banca de DEFESA: JULIANA LIVIAN LIMA DE ABREU
Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.STUDENT : JULIANA LIVIAN LIMA DE ABREU
DATE: 31/03/2021
TIME: 14:00
LOCAL: Sala virtual no google meet
TITLE:
ANATOMIC CHARACTERIZATION, BASIC DENSITY AND VARIATIONS IN THE COLORING OF TROPICAL WOODS WITH DIFFERENT YEARS OF STORAGE IN A BAUXITE MINING AREA IN PARÁ
KEY WORDS:
Anatomy. Storage. Density. Extractives. Colorimetry.
PAGES: 77
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUMMARY:
Vegetable suppression as a stage of mining activity generates a significant amount of suppressed wood logs for the excavation activity. These feats are commonly stacked in open-air storage yards in the areas of the project and are exposed as more varied weather conditions, which favor the degradation process. In this way, this work aims to characterize possible changes in the anatomical structure, variations in density and color in wood stocked with different periods in the mining area. Thus, logs from Jacaranda copaia, Astronium lecointei, Caryocar villosum and Protium altissimum were collected, stored in storage yards categorized in 0 to eight years of storage. From each species, three replicates (logs) were collected per year of stacking, totaling 54 different ones with different diameters. All analyzes were performed using the heartwood portion. Following the methodology traditionally used in studies of wood anatomy, observing variations in the cellular dimensions of anatomical structures, these changes do not follow a pattern of increase or decrease in relation to the storage time. In the analysis of the basic density of the woods, it was found variation over the sampling time, being directly proportional in Caryocar villosum and Jacaranda copaia. Their solubility, both in hot and cold water, alternates according to the storage time, being directly proportional in Jacaranda copaia. The results of the colorimetric analyzes revealed that the color of the wood of all species tended to darken with time of exposure in storage yards, with the species Astronium lecointei showing the greatest variation in color over time.
BANKING MEMBERS:
Presidente - 1550131 - MARCELA GOMES DA SILVA
Interna - 2410727 - LINA BUFALINO
Externa ao Programa - 1201711 - SELMA LOPES GOULART
Externo à Instituição - ALISSON RODRIGO SOUZA REIS - UFPA
Externa à Instituição - LUCIANA KARLA VALERIA DOS SANTOS SOUSA - UFOPA