F
Fábio dos Santos Grasel
Researcher at Universidade Federal do Rio Grande do Sul
Publications - 23
Citations - 347
Fábio dos Santos Grasel is an academic researcher from Universidade Federal do Rio Grande do Sul. The author has contributed to research in topics: Acacia mearnsii & Fourier transform infrared spectroscopy. The author has an hindex of 8, co-authored 23 publications receiving 281 citations. Previous affiliations of Fábio dos Santos Grasel include Pontifícia Universidade Católica do Rio Grande do Sul.
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Journal ArticleDOI
Development of methodology for identification the nature of the polyphenolic extracts by FTIR associated with multivariate analysis.
TL;DR: Among all samples analysed, the chestnut and valonea showed the greatest similarity, indicating that these extracts contain equivalent chemical compositions and structure and, therefore, similar properties.
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Green chemistry preparation of superparamagnetic nanoparticles containing Fe3O4 cores in biochar
Muhammad Yahya Khan,Antonio S. Mangrich,Antonio S. Mangrich,Antonio S. Mangrich,Juliana Schultz,Fábio dos Santos Grasel,Ney Mattoso,D. H. Mosca +7 more
TL;DR: In this article, the synthesis of superparamagnetic iron oxide (Fe 3 O 4 ) nanoparticles in biochar obtained from the condensed tannin extract of Acacia mearnsii, using a single-step process that is compliant with the principles of green chemistry.
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Ultraviolet spectroscopy and chemometrics for the identification of vegetable tannins
TL;DR: In this paper, six different commercial vegetable tannins were analyzed by ultraviolet spectroscopy and multivariate analysis, and a specific absorptivity and quantified the total polyphenols and tannin content of each extract by filter and Folin Ciocalteu methods, respectively.
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A rapid and non-invasive method for the classification of natural tannin extracts by near-infrared spectroscopy and PLS-DA
TL;DR: In this paper, 49 samples of vegetable tannin extracts, representing six commercially available types, were analyzed by near infrared and multivariate analyses (HCA and PLS-DA).