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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
03/11/2021 |
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Data da última atualização: |
10/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
TOMASI, J. de C.; LIMA, G. G. de; DUARTE, M. M.; GODOY, R. C. B. de; WENDLING, I.; HELM, C. V.; HANSEL, F. A.; GRUNENNVALDT, R. L.; TOMAZZOLI, M. M.; DESCHAMPS, C. |
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Afiliação: |
JÉSSICA DE CÁSSIA TOMASI, UFPR; GABRIEL GOETTEN DE LIMA, PIPE, UFPR; MANOELA MENDES DUARTE, UFPR; ROSSANA CATIE BUENO DE GODOY, CNPF; IVAR WENDLING, CNPF; CRISTIANE VIEIRA HELM, CNPF; FABRICIO AUGUSTO HANSEL, CNPF; RENATA LÚCIA GRUNENNVALDT, University of the Sunshine Coast; MAÍRA MACIEL TOMAZZOLI, UFPR; CÍCERO DESCHAMPS, UFPR. |
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Título: |
Toasted yerba mate: impact of drying methods on bioactive compounds, antioxidant capacity, and mate tea consumer acceptance. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of Food Processing and Preservation, v. 45, e15944, 2021. 12 p. |
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DOI: |
https://doi.org/10.1111/jfpp.15944 |
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Idioma: |
Inglês |
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Conteúdo: |
This work investigates the consumer's acceptance of hot and iced mate tea, bioactive compounds content and antioxidant capacity of toasted yerba mate leaves dried from various processes, aiming at presenting drying alternatives to the traditional, and mostly used, methods. Therefore, five drying methods were tested, traditional rotary dryer, conveyor dryer and three alternatives including microwave oven, over dryer at 40, 60, 80℃ and freeze-drying, which was followed by toasting. Overall, the microwave oven and freeze dryer were highly efficient and can be considered as drying alternatives with high values of total phenolic compounds (78.72 mg GAE g−1), antioxidant capacity by DPPH/ABTS (376.6 TEAC µmol g−1/1062.04 TEAC µmol g−1), caffeine (13.25 mg g−1) and caffeoylquinic acids (69 mg g−1). Using a reworked python script, the preference map of teas dried in microwave oven and freeze-drying resulted in similar sensory acceptance for hot tea, produced using traditional drying methods, with a slight decrease for the iced tea. Novelty impact statement: The tea industry can adopt microwave and freeze drying as alternative methods for drying mate leaves, this is followed by toast in order to obtain the commercial tea. These methodologies present smaller equipment sizes and removes the dangerous traditional process known as ?zapeco?. The microwave and freeze drying have a small decrease in sensory acceptance compared to traditional methods used in agri-food industry but with high content of total phenolic compounds, caffeoylquinic acids and high antioxidant activities; also, in the case of microwaves, this method has the advantage of reducing the drying time. MenosThis work investigates the consumer's acceptance of hot and iced mate tea, bioactive compounds content and antioxidant capacity of toasted yerba mate leaves dried from various processes, aiming at presenting drying alternatives to the traditional, and mostly used, methods. Therefore, five drying methods were tested, traditional rotary dryer, conveyor dryer and three alternatives including microwave oven, over dryer at 40, 60, 80℃ and freeze-drying, which was followed by toasting. Overall, the microwave oven and freeze dryer were highly efficient and can be considered as drying alternatives with high values of total phenolic compounds (78.72 mg GAE g−1), antioxidant capacity by DPPH/ABTS (376.6 TEAC µmol g−1/1062.04 TEAC µmol g−1), caffeine (13.25 mg g−1) and caffeoylquinic acids (69 mg g−1). Using a reworked python script, the preference map of teas dried in microwave oven and freeze-drying resulted in similar sensory acceptance for hot tea, produced using traditional drying methods, with a slight decrease for the iced tea. Novelty impact statement: The tea industry can adopt microwave and freeze drying as alternative methods for drying mate leaves, this is followed by toast in order to obtain the commercial tea. These methodologies present smaller equipment sizes and removes the dangerous traditional process known as ?zapeco?. The microwave and freeze drying have a small decrease in sensory acceptance compared to traditional methods used ... Mostrar Tudo |
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Palavras-Chave: |
Erva mate; Propriedade sensorial. |
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Thesagro: |
Ilex Paraguariensis; Sabor. |
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Thesaurus Nal: |
Flavor; Sensory properties; Yerba mate. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02709naa a2200325 a 4500
001 2135755
005 2022-05-10
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1111/jfpp.15944$2DOI
100 1 $aTOMASI, J. de C.
245 $aToasted yerba mate$bimpact of drying methods on bioactive compounds, antioxidant capacity, and mate tea consumer acceptance.$h[electronic resource]
260 $c2021
520 $aThis work investigates the consumer's acceptance of hot and iced mate tea, bioactive compounds content and antioxidant capacity of toasted yerba mate leaves dried from various processes, aiming at presenting drying alternatives to the traditional, and mostly used, methods. Therefore, five drying methods were tested, traditional rotary dryer, conveyor dryer and three alternatives including microwave oven, over dryer at 40, 60, 80℃ and freeze-drying, which was followed by toasting. Overall, the microwave oven and freeze dryer were highly efficient and can be considered as drying alternatives with high values of total phenolic compounds (78.72 mg GAE g−1), antioxidant capacity by DPPH/ABTS (376.6 TEAC µmol g−1/1062.04 TEAC µmol g−1), caffeine (13.25 mg g−1) and caffeoylquinic acids (69 mg g−1). Using a reworked python script, the preference map of teas dried in microwave oven and freeze-drying resulted in similar sensory acceptance for hot tea, produced using traditional drying methods, with a slight decrease for the iced tea. Novelty impact statement: The tea industry can adopt microwave and freeze drying as alternative methods for drying mate leaves, this is followed by toast in order to obtain the commercial tea. These methodologies present smaller equipment sizes and removes the dangerous traditional process known as ?zapeco?. The microwave and freeze drying have a small decrease in sensory acceptance compared to traditional methods used in agri-food industry but with high content of total phenolic compounds, caffeoylquinic acids and high antioxidant activities; also, in the case of microwaves, this method has the advantage of reducing the drying time.
650 $aFlavor
650 $aSensory properties
650 $aYerba mate
650 $aIlex Paraguariensis
650 $aSabor
653 $aErva mate
653 $aPropriedade sensorial
700 1 $aLIMA, G. G. de
700 1 $aDUARTE, M. M.
700 1 $aGODOY, R. C. B. de
700 1 $aWENDLING, I.
700 1 $aHELM, C. V.
700 1 $aHANSEL, F. A.
700 1 $aGRUNENNVALDT, R. L.
700 1 $aTOMAZZOLI, M. M.
700 1 $aDESCHAMPS, C.
773 $tJournal of Food Processing and Preservation$gv. 45, e15944, 2021. 12 p.
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Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
15/03/1999 |
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Data da última atualização: |
15/03/1999 |
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Autoria: |
OLIVEIRA, A. L. B.; RIBEIRO, J. R. A.; RUMJANEK, V. M.; RUMJANEK, Norma G. |
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Título: |
Antisera protein a purification improve the specificity of recognition of Bradyrhizobium polysaccharides. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE BIOQUIMICA E BIOLOGIA MOLECULAR, 26., maio 1997, Caxambu. Resumos... Caxambu: Sociedade Brasileira de Bioquimica e Biologia Molecular, 1997. p.135. |
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Idioma: |
Inglês |
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Conteúdo: |
Crossreaction is a major problem for immunological studies when de polyclonal serum is used. The presence of another immunoglobulins than IgG results in the recognition of another molecules than the specifics antigens. The protein A purification of antiserum has been reported as an excelent method to isolate igG of other serum proteins. This purification improves the reaction and the specificity of antisera which are used in immunological studies of Rhizobia. This studies include identification and competitive assays of bacteria and surface molecules. Rhizobia are gram-negative symbiotic nitrogen fixing bacteria which infect the roots of leguminous plants and have on their surface a high amount of polysaccharides, which may comprise the following types: exo- polysaccharides (EPS), capsular polysaccharide (CPS), lipopolysaccharide (LPS) and B-glucans. Several functions have already been suggested for polysaccharides, regarding the infection process, nodulation and nitrogen-fixing efficiency. In this work we tested the reactivity and the specificity of two purified and unpurified sera(antiBR-33 strain of B. japonicum and antiBR-96 strain of B. elkanii) with EPS and CPS. The unpurified sera showed intense nonespecific recognition. The responses were similar for both types of polysaccharide although the CPS reactions were slightly more intense. The cross-reactions were extremely reduced and even eliminated by purification of the sera. The present work showed that purification with protein A improves the... MenosCrossreaction is a major problem for immunological studies when de polyclonal serum is used. The presence of another immunoglobulins than IgG results in the recognition of another molecules than the specifics antigens. The protein A purification of antiserum has been reported as an excelent method to isolate igG of other serum proteins. This purification improves the reaction and the specificity of antisera which are used in immunological studies of Rhizobia. This studies include identification and competitive assays of bacteria and surface molecules. Rhizobia are gram-negative symbiotic nitrogen fixing bacteria which infect the roots of leguminous plants and have on their surface a high amount of polysaccharides, which may comprise the following types: exo- polysaccharides (EPS), capsular polysaccharide (CPS), lipopolysaccharide (LPS) and B-glucans. Several functions have already been suggested for polysaccharides, regarding the infection process, nodulation and nitrogen-fixing efficiency. In this work we tested the reactivity and the specificity of two purified and unpurified sera(antiBR-33 strain of B. japonicum and antiBR-96 strain of B. elkanii) with EPS and CPS. The unpurified sera showed intense nonespecific recognition. The responses were similar for both types of polysaccharide although the CPS reactions were slightly more intense. The cross-reactions were extremely reduced and even eliminated by purification of the sera. The present work showed that purification w... Mostrar Tudo |
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Palavras-Chave: |
Antigen antibody reaction; Reacao antigeno. |
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Thesagro: |
Anticorpo; Imunidade; Polissacarídeo; Proteína. |
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Thesaurus NAL: |
Bradyrhizobium; immunity; polysaccharides; proteins. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02452naa a2200277 a 4500
001 1620983
005 1999-03-15
008 1997 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, A. L. B.
245 $aAntisera protein a purification improve the specificity of recognition of Bradyrhizobium polysaccharides.
260 $c1997
520 $aCrossreaction is a major problem for immunological studies when de polyclonal serum is used. The presence of another immunoglobulins than IgG results in the recognition of another molecules than the specifics antigens. The protein A purification of antiserum has been reported as an excelent method to isolate igG of other serum proteins. This purification improves the reaction and the specificity of antisera which are used in immunological studies of Rhizobia. This studies include identification and competitive assays of bacteria and surface molecules. Rhizobia are gram-negative symbiotic nitrogen fixing bacteria which infect the roots of leguminous plants and have on their surface a high amount of polysaccharides, which may comprise the following types: exo- polysaccharides (EPS), capsular polysaccharide (CPS), lipopolysaccharide (LPS) and B-glucans. Several functions have already been suggested for polysaccharides, regarding the infection process, nodulation and nitrogen-fixing efficiency. In this work we tested the reactivity and the specificity of two purified and unpurified sera(antiBR-33 strain of B. japonicum and antiBR-96 strain of B. elkanii) with EPS and CPS. The unpurified sera showed intense nonespecific recognition. The responses were similar for both types of polysaccharide although the CPS reactions were slightly more intense. The cross-reactions were extremely reduced and even eliminated by purification of the sera. The present work showed that purification with protein A improves the...
650 $aBradyrhizobium
650 $aimmunity
650 $apolysaccharides
650 $aproteins
650 $aAnticorpo
650 $aImunidade
650 $aPolissacarídeo
650 $aProteína
653 $aAntigen antibody reaction
653 $aReacao antigeno
700 1 $aRIBEIRO, J. R. A.
700 1 $aRUMJANEK, V. M.
700 1 $aRUMJANEK, Norma G.
773 $tIn: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE BIOQUIMICA E BIOLOGIA MOLECULAR, 26., maio 1997, Caxambu. Resumos... Caxambu: Sociedade Brasileira de Bioquimica e Biologia Molecular, 1997. p.135.
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