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| Registros recuperados : 124 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
25/11/2019 |
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Data da última atualização: |
25/11/2019 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SILVEIRA, A. C. da; LAZZAROTTO, M. |
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Afiliação: |
Ana Claudia da Silveira, UFPR; MARCELO LAZZAROTTO, CNPF. |
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Título: |
Evaluation of yerba mate fruit pulp total and fractioned soxhlet extraction using thermal analyses. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
In: SIMPÓSIO DE ANÁLISE TÉRMICA, 9., 2019, Goiania. Programa e resumos. [Goiania: UFG, 2019]. 4 p. |
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Idioma: |
Inglês |
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Conteúdo: |
Ilex paraguariensis leaves are traditionally used to prepare hot or cold beverages in South America. Yerba mate fruit pulp has no commercial value, nevertheless, its extract showed different biological activities. The fruits contain high concentration of saponins and methylxanthines, besides polyphenols and anthocyanins. Soxhlet extraction using polarity gradient of solvents is used to perform total and fractioned extraction of plant material. Thermal analyses are used to evaluate extracts by revealing their behavior when submitted to temperature variation. The aim was to evaluate by thermogravimetry coupled to mass spectrometry extracts from yerba mate semi-ripe fruit pulp, obtained by Soxhlet extraction using diethyl ether, ethyl acetate, ethanol and water solvents. TGA/MS was applied using air atmosphere. Diethyl ether and ethyl acetate showed thermal behavior similarity, indicating similar composition. Only the aqueous extract showed inorganic compounds with approximately 20% of ashes. Ethanolic extract showed more apparent differences of thermal behavior, with the greater mass loss event related to the release of CO2, indicating greater amount of more thermal stable compounds. The other extracts showed their main event related to the loss of CO. Ethanolic extract also showed a greater number of events, being the most complex extract. |
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Palavras-Chave: |
Análise térmica; Erva mate; Extract thermal degradation; Simultaneous thermal analysis; TGA/MS. |
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Thesagro: |
Ilex Paraguariensis. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/205474/1/2019-AAC-MarceloL-SIAT-Evaluation.pdf
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Marc: |
LEADER 02037nam a2200193 a 4500
001 2115077
005 2019-11-25
008 2019 bl uuuu u00u1 u #d
100 1 $aSILVEIRA, A. C. da
245 $aEvaluation of yerba mate fruit pulp total and fractioned soxhlet extraction using thermal analyses.$h[electronic resource]
260 $aIn: SIMPÓSIO DE ANÁLISE TÉRMICA, 9., 2019, Goiania. Programa e resumos. [Goiania: UFG, 2019]. 4 p.$c2019
520 $aIlex paraguariensis leaves are traditionally used to prepare hot or cold beverages in South America. Yerba mate fruit pulp has no commercial value, nevertheless, its extract showed different biological activities. The fruits contain high concentration of saponins and methylxanthines, besides polyphenols and anthocyanins. Soxhlet extraction using polarity gradient of solvents is used to perform total and fractioned extraction of plant material. Thermal analyses are used to evaluate extracts by revealing their behavior when submitted to temperature variation. The aim was to evaluate by thermogravimetry coupled to mass spectrometry extracts from yerba mate semi-ripe fruit pulp, obtained by Soxhlet extraction using diethyl ether, ethyl acetate, ethanol and water solvents. TGA/MS was applied using air atmosphere. Diethyl ether and ethyl acetate showed thermal behavior similarity, indicating similar composition. Only the aqueous extract showed inorganic compounds with approximately 20% of ashes. Ethanolic extract showed more apparent differences of thermal behavior, with the greater mass loss event related to the release of CO2, indicating greater amount of more thermal stable compounds. The other extracts showed their main event related to the loss of CO. Ethanolic extract also showed a greater number of events, being the most complex extract.
650 $aIlex Paraguariensis
653 $aAnálise térmica
653 $aErva mate
653 $aExtract thermal degradation
653 $aSimultaneous thermal analysis
653 $aTGA/MS
700 1 $aLAZZAROTTO, M.
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Registro original: |
Embrapa Florestas (CNPF) |
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