Banca de QUALIFICAÇÃO: NATÁLIA CRISTINA MORAIS FERNANDES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : NATÁLIA CRISTINA MORAIS FERNANDES
DATE: 20/04/2022
TIME: 15:30
LOCAL: campus gameleira
TITLE:

Characterization of chemical products obtained from the lignin degradation by fungi Trametes villosa

KEY WORDS:

Lignin, Trametes Villosa, Chemicals products

PAGES: 55
BIG AREA: Ciências Biológicas
AREA: Microbiologia
SUBÁREA: Microbiologia Aplicada
SPECIALTY: Microbiologia Industrial e de Fermentação
SUMMARY:

The biological valorization of lignin as a raw material for the production of fuel and and value-added chemical products allows for the implementation of sustainable biorefineries, as it is a renewable input. Lignin is a highly recalcitrant compound found in all types of plants, which is part of the complex known as lignocellulose. The lignocellulose complex is a fibrous matrix formed by cellulose, hemicellulose and lignin. The best known applications are for cellulose and hemicellulose, and lignin presents the greatest challenge from an industrial point of view, due to the need for depolymerization. However, there is great interest in studying the use of lignin, since it has a structure rich in aromatic groups. In nature, the complete degradation of plants is carried out by fungi and bacteria. Currently, several species of fungi with high potential for lignin degradation are known. The process of degradation of plant material is complex, and different microorganisms, enzymes and finely regulated and interconnected metabolic pathways are involved. This work aims to characterize the chemical products formed from the microbiological degradation of lignin. For this, two different sources of lignin were used as substrate, synthetic alkaline lignin and lignin from sugarcane bagasse and subjected to degradation by the fungus Trametes villosa CCMB561. After 10 days of incubation, the supernatant of experiment was collected and analyzed for the presence of chemical compounds. For the characterization of the substances formed during the process of microbiological degradation of lignin, the samples obtained were submitted to analysis of Gas Chromatography - Mass Spectrometry (GC-MS) and Spectrophotometry in the Ultraviolet and visible region (UV-vis). The degradation of lignin by fungi and enzymes are well described in the scientific literature. However, the products derived from the microbiological of lignin degradation are still little know, thus allowing a vast field for study. The prospection of products from the biological degradation of lignin will expand the potential of application of lignin as a matrix of chemical inputs.

BANKING MEMBERS:
Interna - ANA MARIA DE RESENDE MACHADO
Externo à Instituição - ARISTOTELES GOES-NETO