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| Registros recuperados : 7 | |
| 5. |  | LIMA, G. G. de; RUIZ, H. Z.; MATOS, M.; HELM, C. V.; LIZ, M. V. de; MAGALHAES, W. L. E. Prediction of yerba mate caffeine content using near infrared spectroscopy. Spectroscopy Letters, v. 52, n. 5, p. 282-287, 2019.| Biblioteca(s): Embrapa Florestas. |
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| 6. | | BENEDITO, D. C. D.; STUEPP, C. A.; HELM, C. V.; LIZ, M. V. de; MIRANDA, A. C. de; IMOSKI, R.; LAVORANTI, O. J.; WENDLING, I. Bioactive compounds concentrations and stability in leaves of Ilex paraguariensis genotypes. Forests, v. 14, n. 12, p. 1-18, 2023.| Biblioteca(s): Embrapa Florestas. |
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| 7. | | RAKOCEVIC, M.; MAIA, A. de H. N.; LIZ, M. V. de; IMOSKI, R.; HELM, C. V.; CARDOZO JUNIOR, E. L.; WENDLING, I. Stability of leaf yerba mate (Ilex paraguariensis) metabolite concentrations over the time from the prism of secondary Sexual dimorphism. Plants, v. 12, n. 11, article 2199, 2023.| Biblioteca(s): Embrapa Florestas; Embrapa Meio Ambiente. |
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| Registros recuperados : 7 | |
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Registro Completo
|
Biblioteca(s): |
Embrapa Florestas. |
|
Data corrente: |
22/12/2017 |
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Data da última atualização: |
22/12/2017 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
HELM, C. V.; RUIZ, H. Z.; MIRANDA, A. C. de; WENDLING, I.; LIZ, M. V. de. |
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Afiliação: |
CRISTIANE VIEIRA HELM, CNPF; HENRIQUE ZAVATTIERI RUIZ, Graduando da UTFPR; AMANDA COELHO DE MIRANDA, Graduanda da UTFPR; IVAR WENDLING, CNPF; MARCUS VINICIUS DE LIZ, UTFPR. |
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Título: |
Metilxantinas e compostos fenólicos em amostras de erva-mate. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
In: ENCONTRO NACIONAL DE QUÍMICA AMBIENTAL, 8., 2017, Curitiba. O químico e os desafios ambientais na sociedade atual: resumos e trabalhos completos. Curitiba: UTFPR, 2017. |
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Páginas: |
p. 562-566. |
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Idioma: |
Português |
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Conteúdo: |
Currently Brazil is one of the largest producers of yerba mate (Ilex paraguariensis St. Hill) with most of the commercial production in plantations without genetic improvement or extraction into areas of natural occurrence. The production and accumulation of compounds of interest such as methylxanthines and phenolic compounds can vary by genetic factors as by environmental factors. This study aimed to quantify the levels of caffeine and theobromine by high-performance liquid chromatography and total phenolic, Folin Ciocalteu method, in extracts prepared by the infusion of dried and crushed leaves in boiling water from the 52 yerba mate progenies, 49 coming from Ivaí / PR and 3 grown at Embrapa Forests. The maximum level of caffeine found 2.39 g/100 g of dry leaf, theobromine 1.56 g/ 100 g and phenolic compounds 13.38 g/100g. In 4 samples evaluated the concentration of the methylxantine theobromine was below the limit of quantification, the minimum content of caffeine was found to be 0.01 g/100g and a minimum amount of phenolic compounds was 6.65 g /100g. |
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Palavras-Chave: |
Erva mate; Polifenois. |
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Thesagro: |
Cafeína; Espécie nativa; Ilex Paraguariensis; Teobromina. |
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Thesaurus NAL: |
Caffeine; Polyphenols; Theobromine. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/169730/1/2017-CrisH-ENQA-Metilxantinas.pdf
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|
Marc: |
LEADER 01933nam a2200277 a 4500
001 2083416
005 2017-12-22
008 2017 bl uuuu u00u1 u #d
100 1 $aHELM, C. V.
245 $aMetilxantinas e compostos fenólicos em amostras de erva-mate.$h[electronic resource]
260 $aIn: ENCONTRO NACIONAL DE QUÍMICA AMBIENTAL, 8., 2017, Curitiba. O químico e os desafios ambientais na sociedade atual: resumos e trabalhos completos. Curitiba: UTFPR$c2017
300 $ap. 562-566.
520 $aCurrently Brazil is one of the largest producers of yerba mate (Ilex paraguariensis St. Hill) with most of the commercial production in plantations without genetic improvement or extraction into areas of natural occurrence. The production and accumulation of compounds of interest such as methylxanthines and phenolic compounds can vary by genetic factors as by environmental factors. This study aimed to quantify the levels of caffeine and theobromine by high-performance liquid chromatography and total phenolic, Folin Ciocalteu method, in extracts prepared by the infusion of dried and crushed leaves in boiling water from the 52 yerba mate progenies, 49 coming from Ivaí / PR and 3 grown at Embrapa Forests. The maximum level of caffeine found 2.39 g/100 g of dry leaf, theobromine 1.56 g/ 100 g and phenolic compounds 13.38 g/100g. In 4 samples evaluated the concentration of the methylxantine theobromine was below the limit of quantification, the minimum content of caffeine was found to be 0.01 g/100g and a minimum amount of phenolic compounds was 6.65 g /100g.
650 $aCaffeine
650 $aPolyphenols
650 $aTheobromine
650 $aCafeína
650 $aEspécie nativa
650 $aIlex Paraguariensis
650 $aTeobromina
653 $aErva mate
653 $aPolifenois
700 1 $aRUIZ, H. Z.
700 1 $aMIRANDA, A. C. de
700 1 $aWENDLING, I.
700 1 $aLIZ, M. V. de
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Embrapa Florestas (CNPF) |
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