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Bioactive compounds of juices from two Brazilian grape cultivars. Repositório Alice
SILVA, J. K.; CAZARIN, C. B. B.; CORREA, L. C.; BATISTA, A. G.; FURLAN, C. P. B.; BIASOTO, A. C. T.; PEREIRA, G. E.; CAMARGO, A. C. de; MARÓSTICA JUNIOR, M. R..
Abstract BACKGROUND: Grape juice consumption may prevent several chronic diseases owing to the presence of phenolic compounds, which have an important role in the reduction of oxidative stress. This study investigated the polyphenol content and antioxidant activities of grape juices from two cultivars: BRS-Cora and Isabella. Total polyphenol content (TPC), anthocyanins, antioxidant capacity (oxygenradical absorbance capacity, ferric reducing antioxidantpower and1,1-diphenyl-2-picrylhydrazyl), and phenolic profile (high-performance liquid chromatography with diode array and fluorescence detection ? HPLC-DAD-FLD) were determined. RESULTS: BRS-Cora grape juice showed higher concentrations of total polyphenols and anthocyanins, as well as higher antioxidant...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Variedade Isabella; BRS-Cora; Uva; Suco de uva; Polifenóis; Potencial antioxidante; Compostos bioativos; Grape juice; Polyphenols; Antioxidant potential; Bioactive Compounds.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1059836
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Bioactive compounds of juices from two Brazilian grape cultivars. Repositório Alice
SILVA, J. K.; CAZARIN, C. B. B.; CORREA, L. C.; BATISTA, A. G.; FURLAN, C. P. B; BIASOTO, A. C. T.; PEREIRA, G. E.; CAMARGO, A. C. de; MARÓSTICA JUNIORA, M. R..
Grape juice consumption may prevent several chronic diseases owing to the presence of phenolic compounds, which have an important role in the reduction of oxidative stress. This study investigated the polyphenol content and antioxidant activities of grape juices from two cultivars: BRS-Cora and Isabella. Total polyphenol content (TPC), anthocyanins, antioxidant capacity (oxygenradical absorbance capacity, ferric reducing antioxidantpower and1,1-diphenyl-2-picrylhydrazyl), and phenolic profile (high-performance liquid chromatography with diode array and fluorescence detection ? HPLC-DAD-FLD) were determined.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Variedade Isabella; BRS-Cora; Uva; Suco de uva; Polifenóis; Potencial antioxidante; Compostos bioativos; Grape juice; Polyphenols; Antioxidant potential; Bioactive compounds.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1036811
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Bioactive properties of the medicinal mushroom Leucopaxillus giganteus mycelium obtained in the presence of different nitrogen sources IPB - Escola Superior Agrária
Barros, Lillian; Baptista, Paula; Estevinho, Leticia M.; Ferreira, Isabel C.F.R..
Leucopaxillus mushroom species are used in the chemical industry for extraction of clitocybin antibiotic and particularly the edible mushroom Leucopaxillus giganteus can be found in Northeast Portugal. Nevertheless, the production of its mycelium for pharmacological applications has not been explored. Herein, the mycelium obtained in the presence of four different nitrogen sources was investigated with regard to phenol production and antimicrobial and antioxidant properties. Phenol concentration increased along the growth time as a response to the oxidative stress and therefore free radical production. Although significant differences for mycelium growth between the nitrogen sources had not been observed, (NH4)2HPO4 proved to be the most appropriate to...
Tipo: Article Palavras-chave: Mushroom mycelium; Nitrogen source; Antimicrobial activity; Antioxidant potential; Nutraceuticals.
Ano: 2007 URL: http://hdl.handle.net/10198/833
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Chemical assessment and in vitro antioxidant capacity of Ficus carica latex IPB - Escola Superior Agrária
Oliveira, A.P.; Silva, L.R.; Ferreres, F.; Pinho, P. Guedes de; Valentão, P.; Silva, B.M.; Pereira, J.A.; Andrade, P.B..
Ficus species possess latex-like material within their vasculatures, affording protection and selfhealing from physical attacks. In this work, metabolite profiling was performed on Ficus carica latex. Volatiles profile was determined by HS-SPME/GC-IT-MS, with 34 compounds being identified, distributed by distinct chemical classes: 5 aldehydes, 7 alcohols, 1 ketone, 9 monoterpenes, 9 sesquiterpenes and 3 other compounds. Sesquiterpenes constituted the most abundant class in latex (ca. 91% of total identified compounds). Organic acids composition was also characterized, by HPLC-UV, and oxalic, citric, malic, quinic, shikimic and fumaric acids were determined. Malic and shikimic acids were present in higher amounts (ca. 26%, each). The antioxidant potential...
Tipo: Article Palavras-chave: Ficus carica latex; Volatiles; Organic acids; Antioxidant potential; Acetylcholinesterase inhibition.
Ano: 2010 URL: http://hdl.handle.net/10198/3116
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Chemical composition, and antioxidant and antimicrobial activities of three hazelnut (Corylus avellana L.) cultivars. IPB - Escola Superior Agrária
Oliveira, I.; Sousa, A.; Morais, Jorge Sá; Ferreira, Isabel C.F.R.; Bento, Albino; Estevinho, Leticia M.; Pereira, J.A..
Hazelnut (Corylus avellana L.) is a very popular dry fruit in the world being consumed in different form and presentations. In the present work, three hazelnut cultivars (cv. Daviana, Fertille de Coutard and M. Bollwiller) produced in Portugal, were characterized in respect to their chemical composition, antioxidant potential and antimicrobial activity. The samples were analysed for proximate constituents (moisture, fat, crude protein, ash), nutritional value and fatty acids profile by GC/FID. Antioxidant potential was accessed by the reducing power assay, the scavenging effect on DPPH (2,2-diphenyl-1-picrylhydrazyl) radicals and b-carotene linoleate model system. Their antimicrobial capacity was also checked against Gram positive (Bacillus cereus, B....
Tipo: Article Palavras-chave: Hazelnut; Nutritional value; Fatty acids; Antioxidant potential; Antimicrobial activity.
Ano: 2008 URL: http://hdl.handle.net/10198/777
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Comparative study of phytochemicals and antioxidant potential of wild edible mushroom caps and stipes IPB - Escola Superior Agrária
Ribeiro, Bárbara; Lopes, Rosário; Andrade, P.B.; Seabra, R.M.; Gonçalves, Rui; Baptista, Paula; Quelhas, Inês; Valentão, P..
A comparative study of the organic acids and phenolics composition and of the total alkaloids content of entire wild edible mushrooms (Russula cyanoxantha, Amanita rubescens, Suillus granulatus and Boletus edulis) and correspondent caps and stipes was performed. All species presented oxalic, citric, malic and fumaric acids, with A. rubescens exhibiting the highest total organic acids content. Organic acids were preferably fixed in the cap. Among phenolics, only p-hydroxybenzoic acid was found in A. rubescens and S. granulatus, in very low amounts. B. edulis was the species that presented the highest total alkaloid amounts. Except for this species, alkaloids mainly accumulated in the cap. All of the species exhibited a concentration-dependent scavenging...
Tipo: Article Palavras-chave: Wild edible mushrooms; Alkaloids; Phenolic compounds; Organic acids; Antioxidant potential.
Ano: 2008 URL: http://hdl.handle.net/10198/4404
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Compositional studies and biological activities of some mash bean (Vigna mungo (L.) Hepper) cultivars commonly consumed in Pakistan Biol. Res.
Zia-Ul-Haq,Muhammad; Ahmad,Shakeel; Bukhari,Shazia Anwer; Amarowicz,Ryszard; Ercisli,Sezai; Jaafar,Hawa ZE.
BACKGROUND: In recent years, the desire to adopt a healthy diet has drawn attention to legume seeds and food products derived from them. Mash bean is an important legume crop used in Pakistan however a systematic mapping of the chemical composition of mash bean seeds is lacking. Therefore seeds of four mash bean (Vigna mungo (L.) Hepper, family Leguminoseae) cultivars (NARC-Mash-1, NARC-Mash-2, NARC-Mash-3, NARC-Mash-97) commonly consumed in Pakistan have been analyzed for their chemical composition, antioxidant potential and biological activities like inhibition of formation of advanced glycation end products (AGE) activity and tyrosinase inhibition activity. RESULTS: The investigated cultivars varied in terms of biochemical composition to various...
Tipo: Journal article Palavras-chave: Nutrients; Antioxidant potential; Mash bean cultivar; Pakistan.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100023
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Contents of carboxylic acids and two phenolics and antioxidant activity of dried Portuguese wild edible mushrooms IPB - Escola Superior Agrária
Ribeiro, Bárbara; Rangel, Joana; Valentão, P.; Baptista, Paula; Seabra, R.M.; Andrade, P.B..
The organic acids and phenolics compositions of nine wild edible mushrooms species ( Suillus bellini, Tricholomopsis rutilans, Hygrophorus agathosmus, Amanita rubescens, Russula cyanoxantha, Boletus edulis, Tricholoma equestre, Suillus luteus, and Suillus granulatus) were determined by HPLC-UV and HPLC-DAD, respectively. The antioxidant potential of these species was also assessed by using the DPPH¥ scavenging assay. The results showed that all of the species presented a profile composed of at least five organic acids: oxalic, citric, malic, quinic, and fumaric acids. In a general way, the pair of malic plus quinic acids were the major compounds. Only very small amounts of two phenolic compounds were found in some of the analyzed species: p-hydroxybenzoic...
Tipo: Article Palavras-chave: Wild edible mushrooms; Organic acids; Phenolic compounds; Antioxidant potential.
Ano: 2006 URL: http://hdl.handle.net/10198/941
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Cultivar effect on the phenolic composition and antioxidant potential of stoned table olives IPB - Escola Superior Agrária
Malheiro, R.; Sousa, A.; Casal, S.; Bento, Albino; Pereira, J.A..
Stoned green table olives ‘‘alcaparras’’ prepared from five different cultivars (Cv. Cobrançosa, Madural, Negrinha de Freixo, Santulhana and Verdeal Transmontana) were investigated concerning their phenolic composition and antioxidant potential. From each cultivar, five independent lots were prepared. The phenolic profile was determined by HPLC/DAD at 280 nm, and antioxidant potential measured using the reducing power and scavenging effect on DPPH (2,2-diphenyl-1-picrylhydrazyl) radicals assays. Twelve phenolic compounds were identified, being hyrdoxytyrosol the most abundant one, followed by verbascoside and tyrosol. Cv. Cobrançosa and Santulhana reported higher content of phenolic compounds, with 165.76 and 163.66 mg/kg of fresh ‘‘alcaparras’’ table...
Tipo: Article Palavras-chave: Olea europaea L.; Stoned table olives; Olive cultivar; Phenolic composition; Antioxidant potential.
Ano: 2011 URL: http://hdl.handle.net/10198/3952
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Effect of solvent and extraction temperatures on the antioxidant potential of traditional stoned table olives “alcaparras” IPB - Escola Superior Agrária
Sousa, A.; Ferreira, Isabel C.F.R.; Barros, Lillian; Bento, Albino; Pereira, J.A..
This paper reports the first approach to the antioxidant potential evaluation of traditional stoned table olives ‘‘alcaparras’’. This kind of olives are largely produced and consumed in Trás-os-Montes region (Northeast of Portugal). Different solvents and temperature extraction conditions were employed in order to achieve the best method to obtain phenolic compounds and a higher antioxidant activity. The optimum method (water at boiling temperature) was applied on 10 samples from the traditional market. The total phenol content ranged between 5.58mg gallic acid equivalents (GAE)/g and 29.88mg GAE/g and effective concentration (EC50) values were in the range 0.36–1.64 and 0.34–1.72 mg/mL for reducing power and radical scavenging effect, respectively. A...
Tipo: Article Palavras-chave: Stoned table olives; Extraction conditions; Phenols; Antioxidant potential.
Ano: 2008 URL: http://hdl.handle.net/10198/740
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Effect of the mycorrhizal symbiosis time in the antioxidant activity of fungi and Pinus pinaster roots, stems and leaves IPB - Escola Superior Agrária
Reis, Filipa S.; Ferreira, Isabel C.F.R.; Martins, Anabela.
The ectomycorrhizal (ECM) symbiosis that develops between the roots of host trees and the soil ECM fungi is an important factor towards the survival, health and growth of these trees, as it stimulates their water and nutrient uptake. Ectomycorrhizal colonization can result in the deposition of phenolic compounds in peripheral cortex cells and a similar answer can be recognized as one way of plant defense against pathogenic infections. The aim of the present work was the evaluation of antioxidant potential of the ectomycorrhizal fungi, Paxillus involutus and Pisolithus arhizus, in presence and absence of the symbiont – Pinus pinaster –, in response to the symbiotic association, under different contact periods (45 days and 48 h). Phenolic contents in...
Tipo: Article Palavras-chave: Ectomycorrhizal fungi; Pinus pinaster; Symbiosis; Contact period; Antioxidant potential.
Ano: 2011 URL: http://hdl.handle.net/10198/6234
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Evaluation of the chemical and antioxidant properties of wild and cultivated mushrooms of Ghana. Repositório Alice
OBODAI, M.; FERREIRA, I. C. F. R.; FERNANDES, A.; BARROS, L.; MENSAH, D. L. N.; DZOMEKU, M.; URBEN, A. F.; PREMPEH, J.; TAKLI, R. K..
bitstream/item/126411/1/molecules-19-19532-v2.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Wild mushrooms; Nutritional value; Antioxidant potential; Cultivated mushrooms; Macro- and micro-elements.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1019605
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Hazel (Corylus avellana L.) leaves as source of antimicrobial and antioxidative compounds IPB - Escola Superior Agrária
Oliveira, I.; Sousa, A.; Valentão, P.; Andrade, P.B.; Ferreira, Isabel C.F.R.; Ferreres, F.; Bento, Albino; Seabra, R.M.; Estevinho, Leticia M.; Pereira, J.A..
Aqueous extracts of leaves of different hazel (Corylus avellana L.) cultivars (Cv. M. Bollwiller, Fertille de Coutard and Daviana), were analysed by reversed-phase HPLC/DAD for the definition of their phenolic composition. Antioxidant potential was assessed by the reducing power assay, and the scavenging effect on DPPH (2,2-diphenyl-1-picrylhydrazyl) radicals and b-carotene linoleate model system. Their antimicrobial capacity was also tested against Gram positive (Bacillus cereus, Bacillus subtilis, Staphylococcus aureus) and Gram negative bacteria (Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae) and fungi (Candida albicans, Cryptococcus neoformans). Eight phenolic compounds were identified: 3-, 4- and 5-caffeoylquinic acids,...
Tipo: Article Palavras-chave: Hazel leaves; Phenolics; Antioxidant potential; Antimicrobial activity.
Ano: 2007 URL: http://hdl.handle.net/10198/753
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Phenolic compounds, organic acids profiles and antioxidative of beefsteak fungus (Fistulina hepatica) IPB - Escola Superior Agrária
Ribeiro, Bárbara; Valentão, P.; Baptista, Paula; Seabra, R.M.; Andrade, P.B..
The phenolic compounds and the organic acids composition of the edible beefsteak fungus Fistulina hepatica was determined by HPLC/DAD and HPLC/UV, respectively. The results showed a profile composed by five phenolic compounds (caffeic, p-coumaric and ellagic acids, hyperoside and quercetin) and six organic acids (oxalic, aconitic, citric, malic, ascorbic and fumaric acids). The quantification of the identified compounds revealed that ellagic acid (ca. 49.7%) and malic acid (ca. 57.9%) are the main compounds in this species. In a general way the phenolic profile revealed to be more constant than the organic acids one and could be more useful for the quality control of the species. Beefsteak fungus was also investigated for its capacity to act as a scavenger...
Tipo: Article Palavras-chave: Fistulina hepatica; Beefsteak fungus; Phenolic compounds; Organic acids; Antioxidant potential.
Ano: 2007 URL: http://hdl.handle.net/10198/943
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Systematic evaluation of the antioxidant potential of different parts of Foeniculum vulgare Mill. from Portugal IPB - Escola Superior Agrária
Barros, Lillian; Heleno, Sandrina A.; Carvalho, Ana Maria; Ferreira, Isabel C.F.R..
Fennel (Foeniculum vulgare Mill.) is a widespread perennial umbeliferous (Apiaceae) herb, traditionally used for medicinal purposes and human consumption. It is highly recommended for diabetes, bronchitis and chronic coughs, and for the treatment of kidney stones; some of those chronic diseases are related to the production of radical species involved in the oxidative stress. Therefore, the antioxidant potential of this herb might explain some of their empirical uses in folk medicine. This is the first time that a systematic study on different parts of fennel is performed, in order to understand differences in the antioxidant potential of shoots, leaves, steams, and inflorescences, particularly related to their composition in antioxidant compounds such as...
Tipo: Article Palavras-chave: Fennel; Portuguese folk medicine; Vitamins; HPLC; Phenolics; Antioxidant potential.
Ano: 2009 URL: http://hdl.handle.net/10198/2651
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Table olives from Portugal: phenolics compounds, antioxidant potential and antimicrobial activity of table olives from Portugal IPB - Escola Superior Agrária
Pereira, J.A.; Pereira, A.P.; Ferreira, Isabel C.F.R.; Valentão, P.; Andrade, P.B.; Seabra, R.M.; Estevinho, Leticia M.; Bento, Albino.
The phenolic compounds composition, antioxidant potential, and antimicrobial activity of different table olives from Portugal, namely, natural black olives “Galega”, black ripe olive “Negrinha de Freixo”, Protected Designation of Origin (PDO) “Azeitona de Conserva Negrinha de Freixo” olives, and “Azeitona de Conserva de Elvas e Campo Maior” Designation of Origin (DO) olives, were investigated. The analysis of phenolic compounds was performed by reversed-phase HPLC/DAD, and seven compounds were identified and quantified: hydroxytyrosol, tyrosol, 5- O-caffeoilquinic acid, verbascoside, luteolin 7-O-glucoside, rutin, and luteolin. The antioxidant activity was assessed by the reducing power assay, the scavenging effect on DPPH (2,2-diphenyl-1-picrylhydrazyl)...
Tipo: Article Palavras-chave: Table olives; Phenolics; Antioxidant potential; Antimicrobial activity.
Ano: 2006 URL: http://hdl.handle.net/10198/750
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