Ressonância Magnética Nuclear e quimiometria como ferramentas de distinção e quantificação de metabólitos de cana-de-açúcar (Saccharum officinarum) e feijão-comum (Phaseolus vulgaris)
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2010-06-11
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Universidade Federal de Goiás
Resumo
Five different common beans cultivars (Phaseolus vulgaris) in the
raw conditions, after water immersion (soaking) and after domestic
processing (cooking), were studied by NMR in solution and HR-MAS NMR, to
obtain a protocol that quantify the oligosaccharides raffinose, stachyose and
verbascose contents in bean seeds. The looking for low contents of these
oligosaccharides in bean seeds is inserted in Embrapa Arroz e Feijão
objectives.
This study describes yet the potentiality of chemometric analysis
applied in 1H HR-MAS NMR and in solution NMR for investigation of
sugarcane varieties. Sugarcane is a primordial material used in Brazil for
production of ethanol biofuel. Several technologies to development of new
sugarcane cultivars have mainly focused the increase of productivity and
greater disease resistance. Sugarcane cultivars are usually identified by
organography of leaves and stems, as well as the analysis of peroxydase
and esterase isoenzyme activities, soluble total protein and soluble solids
content. In this work eight different cultivars of sugarcane leaves were
analyzed: RB72454, RB835054, RB835486, RB855113, RB855156,
RB855453, RB855536 and RB867515. NMR and chemometric analysis
showed useful tools for distinction of the different sugarcane cultivars. In
addition, these techniques successfully demonstrated the chemical
differences about the investigated cultivars, specially the sugar contents.
Descrição
Palavras-chave
RNM , Quimiometria , Feijão-comum , Cana-de-açúcar , MRI , Chemometrics , Common bean , Cane sugar , 1.Ressonância Magnética Nuclear 2.Cana-de-açúcar
(Saccharum officinarum) 3.Feijão comum Phaseolus
vulgaris) , 1.Ressonância Magnética Nuclear 2.Cana-de-açúcar
(Saccharum officinarum) 3.Feijão comum Phaseolus
vulgaris)
Citação
ALVES FILHO, Elenilson de Godoy. Nuclear magnetic resonance and chemometrics as
tools for distinguishing and quantifying metabolites
Sugarcane (Saccharum officinarum) and common bean
(Phaseolus vulgaris). 2010. 95 f. Dissertação (Mestrado em Educação em Química) - Universidade Federal de Goiás, Goiânia, 2010.