Banca de DEFESA: GEOVANE CHACON DE CARVALHO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : GEOVANE CHACON DE CARVALHO
DATA : 08/03/2019
HORA: 08:00
LOCAL: Auditório do NUPPRAR
TÍTULO:

Correlation between thermal, rheological and spectroscopic plants and fatty acid composition of vegetable oils by gas chromatography

PALAVRAS-CHAVES:

Vegetable oils, quality parameters, thermogravimetry, GC-MS, rheological study, physicochemical analysis, fatty acid profile

PÁGINAS: 120
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Analítica
ESPECIALIDADE: Instrumentação Analítica
RESUMO:

This research determined the acidity index (IA), saponification (IS), peroxide (IP), iodine (II), refraction (IR), relative density (d), viscosity (ƞ), composition and acid distribution (OR), cacay (OC), quinoa (OQ), green coffee (OCV), jamelão (OJ) and extracted moringa were analyzed by the Association of Official Analytical Chemists (AOAC) of seeds and leaves and flowers, respectively WHO and OMFF. It performed the thermal characterization using thermogravimetry and calorimetry. The volatiles released during their thermal decomposition by TG-FTIR and a rheological study were analyzed. From the rheological study, the following order OR> OC> OJ> OCV> OMS> OQ> OMFF was obtained for activation energy (Ea). From the TG / DTG / DSC curves obtained it was verified that each analyzed oil had peculiarities in its thermal decomposition, the order of stability proposed through TG / DTG is OQ> OMFF> OCV> WHO> OJ> OC> OU. From the infrared spectra it was possible to observe the evolution of the volatiles during the thermal decomposition, in the atmospheres of synthetic air and N2, of the different oils. It has been found that each oil has different intensities in the thermal decomposition products. It was observed that the products of the decomposition of the studied oils presented the same profile during their thermal decompositions, it is concluded that there is a pattern in the thermal decomposition of these oils with products of similar decomposition. Chromatograms showed seven well-defined major peaks for all samples.

MEMBROS DA BANCA:
Presidente - 7350310 - MARIA DE FATIMA VITORIA DE MOURA
Interno - 348475 - DJALMA RIBEIRO DA SILVA
Externo ao Programa - 3149615 - HENRIQUE EDUARDO BEZERRA DA SILVA
Externa à Instituição - LIVIA PAULIA DIAS RIBEIRO - UNILAB
Externa à Instituição - MARTA CÉLIA DANTAS SILVA - UFPB