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A comparative study on antioxidant activity of different parts of lotus (Nelumbo nuficera Gaertn) rhizome Ciênc. Tecnol. Aliment.
YANG,Dongmei; ZHANG,Qian; REN,Guoping; YING,Tiejin.
Abstract In this study, the antioxidant activities of different parts of lotus (Nelumbo nuficera Gaertn) rhizome were compared. The total phenolic content of lotus rhizome was determined, and Ferric reducing antioxidant power (FRAP) assay, 1,1-diphenyl-2-picrylhydrazyl hydrate (DPPH) radical-scavenging assay and β-carotene-linoleic acid assay were performed to assess the antioxidant activity of lotus rhizome. Results showed that there was a significant difference in total phenolic content and antioxidant activity between any two of four parts of lotus rhizome. The order of total phenolic content and antioxidant activity in different parts of lotus rhizome was as follows: peel of old lotus rhizome > peel of young lotus rhizome > flesh of old lotus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lotus rhizome; Antioxidant activity; FRAP; DPPH; Β-carotene bleaching assay.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000100135
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A novel procedure to measure the antioxidant capacity of Yerba maté extracts Ciênc. Tecnol. Aliment.
Hartwig,Vanessa Graciela; Brumovsky,Luis Alberto; Fretes,Raquel María; Boado,Lucila Sánchez.
Yerba maté extracts have in vitro antioxidant capacity attributed to the presence of polyphenolic compounds, mainly chlorogenic acids and dicaffeoylquinic acid derivatives. DPPH is one of the most used assays to measure the antioxidant capacity of pure compounds and plant extracts. It is difficult to compare the results between studies because this assay is applied in too many different conditions by the different research groups. Thus, in order to assess the antioxidant capacity of yerba maté extracts, the following procedure is proposed: 100 µL of an aqueous dilution of the extracts is mixed in duplicate with 3.0 mL of a DPPH 'work solution in absolute methanol (100 µM.L-1), with an incubation time of 120 minutes in darkness at 37 ± 1 °C, and then...
Tipo: Info:eu-repo/semantics/article Palavras-chave: DPPH; Yerba maté; Antioxidant capacity; Ilex paraguariensis.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000100019
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ACTIVIDAD ANTIOXIDANTE Y PERFIL DE ÁCIDOS GRASOS DE LAS SEMILLAS DE JABUTICABA (Myrciaria cauliflora BERG) Acta biol.Colomb.
NEUZA,JORGE; BRUNA,JORGE BERTANHA; MORENO LUZIA,DÉBORA MARIA.
Múltiples compuestos naturales encontrados en frutas, cereales y vegetales presentan actividad antioxidante. Este trabajo tuvo como objetivo caracterizar las semillas de jabuticaba (Myrciaria cauliflora Berg) en cuanto a su composición proximal y potencial antioxidante, y evaluar el perfil de ácidos grasos en el aceite extraído de las mismas. Para la obtención del extracto, las semillas deshidratadas y trituradas fueron extraídas con alcohol etílico por 30 minutos, en la proporción de 1:3 de semillas:alcohol etílico, bajo agitación continua, a temperatura ambiente. Seguidamente, la mezcla fue filtrada y el sobrenadante deshidratado a 40 ºC con la finalidad de determinar, por pesaje directo, rendimiento en materia seca del extracto. De acuerdo con los...
Tipo: Journal article Palavras-chave: Semillas; Aceites comestibles; Actividad antioxidante; Compuestos fenólicos; DPPH; Frutas.
Ano: 2011 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2011000200006
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Antibacterial and Antioxidant Activities of Slender Amaranth Weed Planta Daninha
AKBAR,M.; SHERAZI,I.N.; IQBAL,M.S.; KHALIL,T.; WAQAS,H.M..
ABSTRACT: In the present study, antibacterial and antioxidant [1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity] activities of a weed, slender amaranth (Amaranthus viridis L.) were investigated. Extracts of different plant parts were prepared in n-hexane, chloroform and ethyl acetate. Antibacterial activity was measured by using 100 mg mL-1 concentration extracts against 4 deadly phytopathogenic bacterial species viz. Pseudomonas syringae Van Hall, Ralstonia solanacearum Smith, Erwinia carotovora (Jones), Holland and Xanthomonas axonopodis Hasse. In antioxidants assays, 10, 20 and 30 mg mL-1 extracts were used keeping DPPH as control. In these bioassays, ethyl acetate fraction of A. viridis leaf exhibited the best antibacterial and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amaranthus viridis; Bioactive components; DPPH; Phytopathogens; Weeds.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100206
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Antioxidant Activities of Chicken Egg White Hydrolysates Obtained by New Purified Protease of Aspergillus avenaceus URM 6706 BABT
Silva,Anna Carolina da; Queiroz,Alana Emilia Soares de França; Oliveira,João Tiago Correia; Medeiros,Erika Valente; Souza-Motta,Cristina Maria de; Moreira,Keila Aparecida.
Abstract Protein hydrolysates originating from egg white have already been reported to be bioactive and, among their biological activities, possess the antioxidant property that protects the body from early ageing and diseases linked to oxidation. Therefore, the objective of this work was to evaluate the antioxidant activity of hydrolysates obtained by the hydrolysis of egg white from hen poultry. The protease produced by Aspergillus avenaceus URM 6706 was purified and subsequently applied to hydrolysate the egg white, and the degree of hydrolysis was verified during the protease exposure time (4-24 h). The hydrolysis was intensified over time of exposure to the protease. It was possible to detect the antioxidant activities of eliminating the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aspergillus; Purification; ABTS; +; DPPH; Chelators.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100508
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Antioxidant activity and flavonoid content of Clusia fluminensis Planch. & Triana Anais da ABC (AABC)
Silva,Maria Carolina A. da; Paiva,Selma R..
Clusia fluminensis Planch. & Triana (Clusiaceae Lindl.) is a native species found in regions of high luminosity and water restriction. The aim of this study was to evaluate the antioxidant activity of Clusia fluminensis crude extracts through the scavenging of the stable free radical DPPH, and the determination of flavones and flavonols content in these extracts. The fruit acetonic extract showed the lowest EC50 value (2.71 ± 0.34 g extract / g DPPH), the lowest percentage of remaining DPPH at the concentrations of 125 and 250 µg/mL (about 4% in both), and also the greatest percentage of flavones and flavonols (13.93 ± 0.21 %). Statistical analysis suggests a positive correlation between the presence of flavonoids and the antioxidant activity of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aluminum chloride; Clusia fluminensis; DPPH; Flavonoids.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300004
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Antioxidant activity of Agaricus brasiliensis basidiocarps on different maturation phases BJM
Mourão,Francielly; Umeo,Suzana Harue; Takemura,Orlando Seiko; Linde,Giani Andrea; Colauto,Nelson Barros.
Different maturation phases of basidiocarp could affect the bioactivity and concentration of some active substances. A. brasiliensis Wasser et al.(A. blazei Murrill) has shown antitumor activity that could be related to the antioxidant activity. However there is no information of the best basidiocarp maturation phase for extracting antioxidant substances in order to determine the moment of harvesting in mushroom cultivation. The objective of this work was to evaluate the antioxidant activity of A. brasiliensis strains on different basidiocarp maturation phases. The best condition for extraction of A. brasiliensis antioxidants is with methanol as solvent at 60 ºC for 60 min. Strains with closed basidiocarp have higher antioxidant activity than with opened...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Absorbance; Antioxidant activity; Basidiomycete; Agaricus blazei; DPPH.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100024
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Antioxidant and anticholinesterase investigations of Rumex hastatus D. Don: potential effectiveness in oxidative stress and neurological disorders Biol. Res.
Ahmad,Sajjad; Ullah,Farhat; Ayaz,Muhammad; Sadiq,Abdul; Imran,Muhammad.
BACKGROUND: Rumex species are traditionally used for the treatment of neurological disorders including headache, migraine, depression, paralysis etc. Several species have been scientifically validated for antioxidant and anticholinestrase potentials. This study aims to investigate Rumex hastatus D. Don crude methanolic extract, subsequent fractions, saponins and flavonoids for acetylcholinestrase, butyrylcholinestrase inhibition and diverse antioxidant activities to validate its folkloric uses in neurological disorders. Rumexhastatus crude methanolic extract (Rh. Cr), subsequent fractions; n-hexane (Rh. Hex), chloroform (Rh. Chf), ethyl acetate (Rh. EtAc), aqueous fraction (Rh. Aq), crude saponins (Rh. Sp) and flavonoids (Rh. Fl) were investigated against...
Tipo: Journal article Palavras-chave: Ethnomedicinal; Acetylcholinesterase; Butyrycholinesterase; DPPH; ABTS.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100020
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Antioxidant capacity and composition of pitanga seeds Ciência Rural
Bagetti,Milena; Facco,Elizete Maria Pesamosca; Rodrigues,Daniele Bobrowski; Vizzotto,Márcia; Emanuelli,Tatiana.
Food industry generates a significant amount of seed wastes from the juice production, frozen pulps and jams. Considering that the characterization of wastes is the first step to determine their potential use, the aim of the present study was to determine the composition and the antioxidant capacity of seeds from pitanga fruits with different flesh colors (purple, red and orange). Chemical composition results revealed that pitanga seeds are a good source of insoluble dietary fiber, with low protein and fat levels, and no relevant differences were found among pitanga seeds from different flesh colors. Pitanga seed extracts had powerful antioxidant capacity that was partially correlated to their high phenolic content and showed some variation according to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant capacity; DPPH; FRAP; Eugenia uniflora L..
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000800036
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Antioxidant properties of some filamentous green algae (Chaetomorpha Genus) BABT
Farasat,Massoumeh; Khavari-Nejad,Ramazan-Ali; Nabavi,Seyed Mohammad Bagher; Namjooyan,Foroogh.
The antioxidant activity and the contents of total phenolics and flavonoids were quantified in the methanolic extracts of four Chaetomorpha species including C. aerea, C. crassa, C. linum and C. brachygona. Eight samples of Chaetomorpha plants were collected from five locations along the northern coasts of the Persian Gulf in south of Iran from December 2010 until October 2011. Methanolic extracts of the seaweeds were assessed for their antioxidant activity using DPPH radical scavenging assay. C. linum showed highest antioxidant potential with a relatively low IC50 (1.484 ± 0.168 mg mL-1), the highest flavonoid content (18.177 ± 2.238 mg RE g-1 ) and a relatively high content of phenolics (2.895 ± 0.415 mg GAE g-1) in comparison with the other species. C....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant; Phenolics; Flavonoid; DPPH; Green algae; Chaetomorpha.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000600005
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Antioxidative properties of tronchuda cabbage (Brassica oleraceae var. costata) external leaves against DPPH, superoxide radical, hydroxyl radical and hypochlorous acid IPB - Escola Superior Agrária
Vrchovska, V.; Sousa, C.; Valentão, P.; Ferreres, F.; Pereira, J.A.; Seabra, R.M.; Andrade, P.B..
The ability of the aqueous extract of tronchuda cabbage (Brassica oleracea L. var. costata DC) external leaves to act as a scavenger of DPPH- and reactive oxygen species (superoxide radical, hydroxyl radical and hypochlorous acid) was investigated. A phytochemical study was also undertaken, and thirteen phenolic compounds and five organic acids were identified and quantified. Tronchuda cabbage extracts exhibited antioxidant capacity in a concentration-dependent manner in all assays, although some pro-oxidant effect was also noticed. The samples with higher phenolic and organic acid contents displayed the major antioxidant potentials.
Tipo: Article Palavras-chave: Tronchuda cabbage; Brassica oleracea L. var. costata DC; DPPH; Superoxide radical; Hydroxyl radical; Hypochlorous acid; Phenolics; Organic acids.
Ano: 2006 URL: http://hdl.handle.net/10198/744
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Atividade antioxidante de frutas do cerrado Ciênc. Tecnol. Aliment.
Roesler,Roberta; Malta,Luciana Gomes; Carrasco,Luciana Cristina; Holanda,Roseane Barata; Sousa,Clélia Alves Socorro; Pastore,Glaucia Maria.
Annona crassiflora (araticum), Solanum lycocarpum (lobeira), Eugenia dysenterica (cagaita), Caryocar brasilense (pequi) e Swartzia langsdorfii (banha de galinha) são frutas do bioma cerrado, conhecidas e consumidas principalmente por populações nativas dessa região. Nesse estudo, as diferentes frações dos frutos acima descritos (polpa, semente e casca) foram avaliadas por meio de extratos aquosos e etanólicos. Alguns extratos mostraram altíssimos conteúdos de compostos fenólicos e foram escolhidos para avaliação do potencial em seqüestrar radicais livres por meio do modelo 2,2 difenil-1-picril hidrazil (DPPH). Os melhores resultados foram: extrato aquoso e etanólico de casca de pequi (IC50 igual a 9,44 e 17,98 µg.mL-1 respectivamente), extrato etanólico de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Frutas tropicais; Cerrado; Atividade antioxidante; DPPH; Fenóis.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612007000100010
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Atividade antioxidante e antimicrobiana do extrato de Lentinula edodes. Repositório Alice
BACH, F.; HELM, C. V.; PEDRO, A. C.; STAFUSSA, A. P.; MACIEL, G. M.; HAMINIUK, C. W. I..
O L. edodes, comumente conhecido como Shiitake, é um cogumelo comestível que além de apresentar importante valor nutricional, vem sendo estudado devido a sua composição promissora de compostos biologicamente ativos. Os objetivos desse estudo foram (i) determinar os compostos fenólicos totais, flavonoides totais, atividade antioxidante e antimicrobiana do extrato fenólico de L. edodes e, (ii) identificar e quantificar os compostos presentes no extrato fenólico por CLUE. A atividade antioxidante in vitro foi determinada pelos métodos DPPH, ABTS e FRAP. Os compostos fenólicos foram isolados e quantificados em cromatógrafo de ultra eficiência (CLUE). A atividade antimicrobiana foi investigada frente a quatro cepas de bactérias patogênicas por meio do método de...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Shiitake; Ácido gálico; DPPH; ABTS; FRAP; CLUE; Lentinula Edodes; Bactéria; Cogumelo Comestível.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1111237
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Atividade antioxidante e teor de fenólicos totais em hortaliças orgânicas e convencionais Ciênc. Tecnol. Aliment.
Arbos,Kettelin Aparecida; Freitas,Renato João Sossela de; Stertz,Sônia Cachoeira; Dornas,Marlos Ferreira.
Considerando que os consumidores estão mais conscientes com a sua saúde e mais preocupados com as condições ambientais, verifica-se uma crescente demanda por alimentos orgânicos. O objetivo deste estudo foi comparar a atividade antioxidante e o teor de fenólicos totais entre alface, rúcula e almeirão de cultivos orgânico e convencional, plantados em uma mesma horta. A atividade antioxidante dos extratos metanólicos das hortaliças foi determinada através do ensaio do DPPH. O teor de fenólicos totais foi obtido espectrofotometricamente de acordo com o método de Folin-Ciocalteu e calculado como equivalente de ácido gálico. A atividade antioxidante contra o radical livre DPPH foi: rúcula orgânica > almeirão orgânico > alface orgânica > rúcula...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hortaliças; Ação antioxidante; Sistema de produção; DPPH; Fenólicos.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000200031
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Atividade antirradical livre de compostos bioativos de soja preta (Glycine max (L.) Merrill). Repositório Alice
ESTEVES, T. C. F.; MACHADO, A. F. de F.; FELBERG, I.; ANTONIASSI, R.; CARRÃO-PANIZZI, M. C.; CALADO, V. M. A.; PEREIRA, J. N..
2014
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Soja preta; Glycine max (L) Merrill; Antirradical livre; Compostos bioativos; Atividade antioxidante; Radicais livres; DPPH; Antocianinas; Soja; Glycine max; Soybeans; Glycine max.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1007544
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Bioactive compounds and antioxidant capacities of 18 non-traditional tropical fruits from Brazil. Repositório Alice
RUFINO, M. do S. M.; ALVES, R. E.; BRITO, E. S. de; PÉREZ-JIMÉNEZ, J.; SAURA-CALIXTO, F.; MANCINI FILHO, J..
2010
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Tropical fruits; Phenolics; Antioxidants; ABTS; DPPH; FRAP.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/handle/doc/880820
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Bioisosteric modification on melatonin: synthesis of new naphthalene derivatives, in vitro antioxidant activity and cytotoxicity studies BJPS
Shirinzadeh,Hanif; Ghalia,Mohammed; Tascioglu,Alev; Adjali,Ferial Intissar; Gunesacar,Gulsen; Gurer-Orhan,Hande; Suzen,Sibel.
Melatonin (MLT) is a strong free radical scavenger that protects the body from the deleterious effects of excess oxidants. Synthesis of MLT analogue compounds with antioxidant potency has recently attracted the interest of researchers. In general, the strategy consists of modifying the groups in the different sites of the indole ring or replacing the indole ring with an analogue. As part of our ongoing research, the antioxidant capacity and cytotoxicity of newly synthesized MLT analogue naphthalene derivatives were evaluated. The radical scavenging activity was tested by a 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. Most of the synthesized compounds showed significant antioxidant activity in comparison to MLT. The structure-activity relationship was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant; Cytotoxic; Melatonin; MTT; DPPH.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100550
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Capacidade antioxidante de hortaliças usualmente consumidas Ciênc. Tecnol. Aliment.
Melo,Enayde de Almeida; Maciel,Maria Inês Sucupira; Lima,Vera Lúcia Arroxelas Galvão; Leal,Fernanda Lídia Lemos; Caetano,Ana Carla da Silva; Nascimento,Rosilda Josefa.
Como objetivo de avaliar a capacidade antioxidante de 15 hortaliças comercializadas na Cidade do Recife, extratos metanólicos foram testados quanto a atividade antioxidante em sistema modelo beta-caroteno/ácido linoléico e a habilidade de seqüestrar o radical estável 1,1-difenil-2-picrilhidrazil (DPPH). Todas as hortaliças investigadas exibiram propriedade antioxidante, entretanto a ação foi diferenciada entre os vegetais. Os extratos metanólicos da couve folha, tomate, batata, couve-flor, repolho verde, espinafre e alface crespa, com percentual de inibição superior a 70%, foram os mais eficazes em seqüestrar o radical livre. Os extratos metanólicos da alface lisa, cebola branca e vagem apresentaram ação moderada (60-70% de inibição), enquanto que a cebola...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hortaliças; Ação antioxidante; DPPH; Sistema modelo beta-caroteno/ácido linoléico.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612006000300024
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Characterization of constituents, quality and stability of pomegranate seed oil (Punica granatum L.) Ciênc. Tecnol. Aliment.
MELO,Illana Louise Pereira de; CARVALHO,Eliane Bonifácio Teixeira de; SILVA,Ana Mara de Oliveira e; YOSHIME,Luciana Tedesco; SATTLER,José Augusto Gasparotto; PAVAN,Rosângela Torres; MANCINI-FILHO,Jorge.
Abstract This study aimed to characterize pomegranate seed oil and evaluate its quality and stability parameters against those of linseed oil. The profile of fatty acids and phytosterols and the content of tocopherols were analyzed by gas chromatography and high performance liquid chromatography, respectively. The quality of both oils was assessed as recommended by the American Oil Chemists' Society (AOCS) and stability was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH), β-carotene bleaching (coupled oxidation of β-carotene/linoleic acid) and Rancimat® assays. While α-linolenic acid (52%) was the most abundant fatty acid in linseed oil (LO), punicic acid (55%) was highest in pomegranate seed oil (PSO). Tocopherols and phytosterols (175 and 539 mg/100...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Punicic acid; Tocopherols; Phytosterols; Coupled oxidation of β-carotene; DPPH.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000100132
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Characterization of the antioxidant capacity of natives fruits from the Brazilian Amazon Region Rev. Bras. Frutic.
Neves,Leandro Camargo; Campos,André José de; Benedette,Ronaldo Moreno; Tosin,Jéssica Milanez; Chagas,Edvan Alves.
The objective of the present study was to characterize the chemistry and the antioxidant capacity in 8 species of native fruits from Amazonia. All the fruits were collected at full physiological and commercial maturity from properties located at: Boa Vista / RR, São Luiz do Anauá / RR, Manaus / AM, and Belém / PA. At the end of the experiment, the functional pattern for the camu-camu fruits showed that the total phenolic and ascorbic acid content and antioxidant assays were superior compared to the other samples. Despite the functional losses detected for the freeze-dried samples of the camu-camu fruit, all the other freeze-dried samples kept under -20ºC showed appropriate stability for long-term storage. In addition, it was also observed that fruit peel...
Tipo: Info:eu-repo/semantics/article Palavras-chave: ORAC; DPPH; Funcional compounds; Nutritional.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452012000400025
Registros recuperados: 47
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