Banca de QUALIFICAÇÃO: DANIEL SEGUNDO XAVIER DA FONSECA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : DANIEL SEGUNDO XAVIER DA FONSECA
DATA : 08/01/2018
HORA: 14:30
LOCAL: Auditório do química 3
TÍTULO:

Study of the lipid composition of the marine sponges Agelas dispar, Chondrilla Nocula, Aplisynna fulva, Desmapsamma anchorata and Topsentia ophiraphidites

PALAVRAS-CHAVES:

Marine sponges, Lipids, Fatty acids, Gas chromatography (GC)

PÁGINAS: 65
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Orgânica
ESPECIALIDADE: Química dos Produtos Naturais
RESUMO:

Fatty acids (FAs) are naturally occurring metabolites ubiquitous in all organisms, as well as marine sponges accumulate (FAs). Recent interest began in the 1970s, and has increased since sponges accumulate (FAs) with very rich chemistry and are strong from a diverse assortment of unprecedented chemical structures. The study of spongy lipids is just as important as other secondary metabolites . Thus, the lipid profile of six sponges from the northeast coast of Brazil were investigated and more than 100 (FAs) were identified. Among these, some unusual for the species of sponges studied such as 10-Undecenoic acid (C11: 1) in was identified together with the cyclo-3-cyclopropaneoctanoic acid with three-carbon cycle in the aliphatic chain and 3,7,11 , 15-tetramethyl Hexadecanoic (phytanic) polymers in the sponge Chondrilla nucula. The structures were confirmed by gas chromatography coupled to GC-MS/MS mass spectrometry through their methyl esters, using 2 (FAs) and 4 research libraries standards and their identification was made through similarity and analysis of mass spectra. Other identified phospholipid (FAs) include 2-hydroxy-16-methylheptadecanoic acid, 2-hydroxypentadecanoic acid, 10-methyl dodecanoic acid. In addition, Δ5.9 (AG) (5Z, 9Z) -15-methyl-5,9-hexadecadienoic acid and (5Z, 9Z) -5,9-octadecadienoic acid. These findings demonstrate the ability of these organisms to synthesize (FAs) considerably different lipids from other living organisms.

MEMBROS DA BANCA:
Externo ao Programa - 1569330 - GRAZIELLE TAVARES MALCHER
Presidente - 1569526 - RENATA MENDONÇA ARAUJO
Externo ao Programa - 1490222 - SILVANA MARIA ZUCOLOTTO LANGASSNER