Data/hora: 26/06/2024 16:18:18

Biblioteca(s): | Epagri-Sede.
Data corrente: | 30/01/2018
Data da última atualização: | 30/01/2018
Autoria: | SOUZA, M.; KUHNEN, S.; KAZAMAB, D. C. S.; KURTZ, C.; TRAPPA, T.; MÜLLER JÚNIOR, V.; COMIN, J. J.
Título: | PREDIÇÃO DOS TEORES DE COMPOSTOS FENÓLICOS E FLAVONOIDES NA PARTE AÉREA DAS ESPÉCIES Secale cereale L., Avena strigosa L. E Raphanus sativus L. POR MEIO DE ESPECTROSCOPIA NO INFRAVERMELHO PRÓXIMO (NIR).
Ano de publicação: | 2017
Fonte/Imprenta: | Química Nova, São Paulo, SP, v. 15, p. 1-8, 2017.
Idioma: | Português

Conteúdo:

Spectroscopy associated with chemometrics is a non-destructive method of the samples for the prediction of phenolic compounds. The objective of the work was to
apply the near infrared spectroscopy (NIR) technique for the prediction of phenolic compounds and &#64258;avonoids in aerial part samples
of cover crops plants Raphanus sativus L., Secale cereale L. and Avena strigosa L. Samples were collected at 60, 80 and 100 days
after sowing (DAS) of the plants and, after lodging (DAA), at 15 and 30 days, in an experiment implanted in the feld, in the city
of Ituporanga, Santa Catarina. The samples were homogenized, identifed, transported on dry ice, lyophilized, crushed, sieved and
stored at -20 °C for analysis. For the calibration, 84 samples were used and for the validation 10 samples. The combination of NIR
spectroscopy and multivariate analysis by partial least squares regression allowed the development of prediction models of phenolics
and &#64258;avonoids with associated errors averaging 10%. NIR spectroscopy is recommended for the development of calibration models
because it allows to non-destructive infer phenolic and total &#64258;avonoid contents, with high analytical frequency, without the use of
reagents and other inputs required by the reference method, with results very close to those obtained in the laboratory.

Palavras-Chave: | chemometrics; cover crops; ectance; multivariate analysis.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_40246.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (101996-1) - UPC - AP - DD -  -  -  - DIS