Banca de DEFESA: ANA KELLY DE SOUSA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANA KELLY DE SOUSA SILVA
DATA : 15/06/2020
HORA: 08:30
LOCAL: ICA/FLORESTA SALA 04 DA PÓS
TÍTULO:

RELATIONSHIP BETWEEN THE BIODEGRADATION DEGREE AND RATE OF FOUR TROPICAL SPECIES BY UNDERGROUND COUPINS AND THEIR TECHNOLOGICAL PROPERTIES

PALAVRAS-CHAVES:

natural resistance, wood chemistry, woodcut termites.

PÁGINAS: 35
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
RESUMO:

The biodegradation of wood is of ecological and economic importance and it is necessary to carry out studies to better understand the effects of this process on different forest species. The objective of this work was to relate the degree and the rate of biodegradation of four tropical species woods with their chemical, anatomical and physical properties. For this, four species were selected: timborana (Pseudopiptadenia suaveolens (Miq.) J.WGRIMES), yellowwood (Euxylophora paraensis Huber), clover (Aegiphila integrifolia (Jacq.) Moldenke) and para-para (Jacaranda copaia (Aubl. ) D.Don) for presenting differences in density, two species of high density and two species of low density to verify the difference not only between the different densities but also, within the same density range. Chemical, anatomical and physical characterizations of the species were carried out, as well as a bioassay of natural resistance with soil termites (Nasutitermes sp.). The bioassay was conducted at the Forest Products Technology Laboratory of the Federal Rural University of the Amazon. Specimens of dimensions 5x2x1 cm were placed in 600ml flasks containing 200 grams of sterilized sand and 1 + 0.05 grams of termites. The experiment took six weeks, in which five specimens of each species were removed every seven days to verify the rate of biodeterioration and the classification according to the categories of visual wear. To verify the variation of the chemical composition of the specimens in relation to the experimentation times, an X-ray diffraction analysis (XRD) was performed. The results show that the species presented different degradation rates and that the chemical composition and anatomical properties have a greater influence on this process when compared to density. Therefore, it can be concluded that the differences in the chemical and anatomical compositions of the species affect the biodegradation process

MEMBROS DA BANCA:
Presidente - 1550131 - MARCELA GOMES DA SILVA
Externo ao Programa - 388496 - SUEO NUMAZAWA
Externo à Instituição - CLAUDIA VIANA URBINATI - UEPA
Externo à Instituição - LAÉRCIO GOUVÊA GOMES - IFPA