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Study on the Copigmentation of betalains

Grant number: 12/23163-0
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): March 01, 2013
Effective date (End): December 31, 2014
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Organic Chemistry
Principal Investigator:Erick Leite Bastos
Grantee:Amanda Capistrano Pinheiro
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The goal of this scientific initiation project is to verify of not the occurrence of intermolecular copigmentation between betalains and phenolic acids or their analogs bearing amine moieties. Two model betalains shall be used: betanin and indicaxanthin. Betanin is a glycosylated red betacyanin that can be obtained from beetroot juice; indicaxanthin is a yellow betaxanthin prepared using betanin as starting material. Both compounds have been extensively investigated in our group. The absorption and fluorescence emission of these betalains in the presence of different concentrations of copigment will be investigated by varying the medium pH and ionic strength.