Optimization of the ellagic acid synthesis process at the bioreactor level using non-conventional yeasts

Abstract Ellagic acid (EA) is a phenolic biomolecule. For its biosynthesis, a source of ellagitannins is required, such as strawberries and yeasts, as precursors of the tannase and ß-glucosidase enzymes responsible for hydrolysis of ellagitannins. Two experimental mixture designs were applied., varying the yeast concentration and the number of ellagitannins in the culture medium, evaluating the enzymatic activity and ellagic acid biosynthesis. Aiming to find the optimal compositions of the non-conventional yeasts assessed in the research to biosynthesize ellagic acid feasibly and efficiently using a response surface performing the statistical analysis in the StatGraphics® program for obtaining a higher yield and optimizing the ellagic acid synthesis process, the results indicate that the strains Candida parapsilosis ITM LB33 and Debaryomyces hansenii ISA 1510 have a positive effect on the synthesis of ellagic acid, since as its concentration increases in the mixture the concentration of ellagic acid in the medium also increases; on the other hand, the addition of Candida utilis ITM LB02 causes a negative effect, resulting in the compositions of 0.516876, 0.483124 and 2.58687E-9 respectively, for a treatment under the same conditions, an optimal value of ellagic acid production would be obtained. With an approximate value of 7.33036 mg/mL

Compostos bioativos de cultivares brasileiras de morango (Fragaria x ananassa Duch. ): caracterização e estudo da biodisponibilidade dos derivados de ácido elágico / Bioactive compounds from Brazilian strawberry cultivars (Fragaria x ananassa Duch. ): characterization and bioavailability of ellagic acid derivatives

O morango representa boa fonte de vitamina C, flavonóides e derivados de ácido elágico e tem ampla aceitação pela população brasileira. Os objetivos deste trabalho foram: caracterizar diferentes cultivares quanto aos teores de compostos bioativos, otimizar a metodologia para quantificação do conteúdo de ácido elágico total, purificar e caracterizar estruturalmente os elagitaninos, avaliar sua potencial atividade antiproliferativa, anti-diabetes tipo 2 e anti-hipertensão, estudar a biodisponibilidade desses compostos in vivo. Os resultados demonstraram que existem diferenças significativas nos teores de compostos bioativos entre as cultivares. As melhores condições para determinação dos teores de ácido elágico total foram: extração em acetona 80 % e posterior hidrólise com ácido trifluoracético (TFA) 2N a 120ºC por 60 minutos. A precipitação com acetato de itérbio foi o método mais eficiente para a purificação dos elagitaninos. Após administração por gavagem a ratos de um purificado de elagitaninos, nenhum composto foi detectado no plasma e tecidos analisados...

Phenolic acids from nymphaea hybrida tach v and antimicrobial activity

Gallic and ellagic acids were isolated from the aerial parts of Nymphaea hybrida Tach. V. for the first time, identified by spectroscopic techniques. They showed significant antimicrobial activity

Constituintes quimicos de Callistene major Mart / Chemical constituents of Callistene major Mart

O estudo químico da madeira de Callistene major Mart. (Vochysiaceae) conduziu a três compostos naturais: ácidos 3,3'-di-0-metyl élagico e 3'-0-metil-3,4-0,0-metilideno élagico e fridelina.