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Registros recuperados: 16
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Antimicrobial activity and bioactive compounds of portuguese wild edible mushrooms methanolic extracts IPB - Escola Superior Agrária
Barros, Lillian; Calhelha, Ricardo C.; Vaz, Josiana A.; Ferreira, Isabel C.F.R.; Baptista, Paula; Estevinho, Leticia M..
The antimicrobial properties of phenolic extracts of Portuguese wild edible mushroom species (Lactarius deliciosus, Sarcodon imbricatus and Tricholoma portentosum) against pathogens were investigated. The minimal inhibitory concentrations (MICs) were evaluated for the entire mushroom, the cap and the stipe, separately; the portion of the mushroom used proved to be influenced in the results obtained, which are directly correlated with the content of total phenols and flavonoids in the extracts. The growth of Grampositive bacteria (Bacillus cereus, B. subtilis,) was well inhibited by these mushrooms, while Escherichia coli (Gramnegative bacteria) was resistant. The study on the antifungal effect of these mushrooms revealed that Candida albicans and...
Tipo: Article Palavras-chave: Wild edible mushrooms; Bioactive compounds; Antimicrobial activity.
Ano: 2007 URL: http://hdl.handle.net/10198/829
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Aroma compounds in eleven edible mushroom species: relationship between volatile profile and sensorial characteristics IPB - Escola Superior Agrária
Pinho, P. Guedes de; Ribeiro, Bárbara; Gonçalves, Rui; Baptista, Paula; Valentão, P.; Seabra, R.M.; Andrade, P.B..
Volatile and semi-volatile components of 11 wild edible mushrooms, Suillus bellini, Suillus luteus, Suillus granulatus, Tricholomopsis rutilans, Hygrophorus agathosmus, Amanita rubescens, Russula cyanoxantha, Boletus edulis, Tricholoma equestre, Fistulina hepatica and Cantharellus cibarius, were determined by headspace solidphase microextraction and by liquid extraction combined with gas chromatographymass spectrometry.
Tipo: ConferenceObject Palavras-chave: Volatile and semi-volatile components; Wild edible mushrooms.
Ano: 2008 URL: http://hdl.handle.net/10198/5934
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Aroma compounds in eleven edible mushroom species: relationship between volatile profile and sensorial characteristics IPB - Escola Superior Agrária
Pinho, P. Guedes de; Ribeiro, Bárbara; Gonçalves, Rui; Baptista, Paula; Valentão, P.; Seabra, R.M.; Andrade, P.B..
Tipo: ConferenceObject Palavras-chave: Wild edible mushrooms; Volatile compounds; HS - SPME; GC-MS.
Ano: 2007 URL: http://hdl.handle.net/10198/5756
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Aroma compounds in eleven edible mushroom species: relationship between volatile profile and sensorial characteristics IPB - Escola Superior Agrária
Pinho, P. Guedes de; Ribeiro, Bárbara; Gonçalves, Rui; Baptista, Paula; Valentão, P.; Seabra, R.M.; Andrade, P.B..
Tipo: ConferenceObject Palavras-chave: Wild edible mushrooms; Aroma compounds; GC- MSMS; Sensorial characteristics.
Ano: 2008 URL: http://hdl.handle.net/10198/5735
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Chemical composition of wild edible mushrooms and antioxidant properties of their water soluble polysaccharidic and ethanolic fractions IPB - Escola Superior Agrária
Vaz, Josiana A.; Barros, Lillian; Martins, Anabela; Santos-Buelga, Celestino; Vasconcelos, M. Helena; Ferreira, Isabel C.F.R..
Mushrooms have become attractive as functional foods and as a source of physiologically beneficial bioactive compounds. Herein, we describe and compare the chemical constituents (phenolic compounds, macronutrients, sugars, fatty acids, tocopherols and ascorbic acid) of four wild edible mushrooms widely appreciated in gastronomy: Armillaria mellea (Vahl) P. Kumm, Calocybe gambosa (Fr.) Donk, Clitocybe odora (Fr.) P. Kumm., Coprinus comatus (O.F. Müll.) Pers. Furthermore, the antioxidant activity of their water soluble polysaccharidic and ethanolic fractions was studied by three different in vitro assays. Coprinus comatus revealed the highest concentrations of sugars (43.23 g/100 g dry weight), PUFA (77.46%), phenolic compounds (45.02 mg/Kg), tocopherols...
Tipo: Article Palavras-chave: Wild edible mushrooms; Bioactive compounds; Phenolic compounds; Polysaccharides; Chemical composition.
Ano: 2011 URL: http://hdl.handle.net/10198/3881
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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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Comparative study on free amino acids composition of wild edible mushroom species IPB - Escola Superior Agrária
Ribeiro, Bárbara; Andrade, P.B.; Silva, B.M.; Baptista, Paula; Seabra, R.M.; Valentão, P..
A comparative study on the amino acid composition of 11 wild edible mushroom species (Suillus bellini, Suillus luteus, Suillus granulatus, Tricholomopsis rutilans, Hygrophorus agathosmus, Amanita rubescens, Russula cyanoxantha, Boletus edulis, Tricholoma equestre, Fistulina hepatica, and Cantharellus cibarius) was developed. To define the qualitative and quantitative profiles, a derivatization procedure with dabsyl chloride was performed, followed by HPLC-UV-vis analysis. Twenty free amino acids (aspartic acid, glutamic acid, asparagine, glutamine, serine, threonine, glycine, alanine, valine, proline, arginine, isoleucine, leucine, tryptophan, phenylalanine, cysteine, ornithine, lysine, histidine, and tyrosine) were determined. B. edulis and T. equestre...
Tipo: Article Palavras-chave: Wild edible mushrooms; Free amino acids; Nutritional value.
Ano: 2008 URL: http://hdl.handle.net/10198/4407
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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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Correlation between the pattern volatiles and the overall aroma of wild edible mushrooms IPB - Escola Superior Agrária
Pinho, P. Guedes de; Ribeiro, Bárbara; Gonçalves, Rui; Baptista, Paula; Valentão, P.; Seabra, R.M.; Andrade, P.B..
Volatile and semivolatile components of 11 wild edible mushrooms, Suillus bellini, Suillus luteus, Suillus granulatus, Tricholomopsis rutilans, Hygrophorus agathosmus, Amanita rubescens, Russula cyanoxantha, Boletus edulis, Tricholoma equestre, Fistulina hepatica, and Cantharellus cibarius, were determined by headspace solid-phase microextraction (HS-SPME) and by liquid extraction combined with gas chromatography–mass spectrometry (GC-MS). Fifty volatiles and nonvolatiles components were formally identified and 13 others were tentatively identified. Using sensorial analysis, the descriptors “mushroomlike”, “farm-feed”, “floral”, “honeylike”, “hay-herb”, and “nutty” were obtained. A correlation between sensory descriptors and volatiles was observed by...
Tipo: Article Palavras-chave: Wild edible mushrooms; Semivolatile compounds; Sensorial analysis; Volatile; GC-MS; Solid-phase microextraction.
Ano: 2008 URL: http://hdl.handle.net/10198/4405
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Fatty acid and sugar compositions, and nutritional value of five wild edible mushrooms from Northeast Portugal IPB - Escola Superior Agrária
Barros, Lillian; Baptista, Paula; Correia, Daniela M.; Casal, S.; Oliveira, M.B.P.P.; Ferreira, Isabel C.F.R..
The chemical composition and nutritional value of five wild edible mushroom species (Agaricus arvensis, Lactarius deliciosus, Leucopaxillus giganteus, Sarcodon imbricatus, Tricholoma portentosum) commonly consumed in the Tra´s-os-Montes region of Northeast Portugal was determined. Chemical composition evaluation included moisture, total oil content, crude protein, ash, carbohydrates, and nutritional value determination. The macronutrient profile in general revealed that the wild mushrooms were rich sources of protein and carbohydrates, and had low amounts of fat. On the basis of the proximate analysis, it can be calculated that an edible portion of 100 g of these mushrooms provides, on average, 28 kcal (118 kJ). The analysis of fatty acid composition,...
Tipo: Article Palavras-chave: Wild edible mushrooms; Chemical composition; Fatty acid composition; Sugar composition; Nutritional value.
Ano: 2007 URL: http://hdl.handle.net/10198/832
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Fatty acid composition of wild edible mushrooms species: a comparative study IPB - Escola Superior Agrária
Ribeiro, Bárbara; Pinho, P. Guedes de; Andrade, P.B.; Baptista, Paula; Valentão, P..
A comparative study was developed on the total fatty acids composition of twelve wild edible mushroom species (Suillus bellini, Suillus luteus, Suillus granulatus, Hygrophorus agathosmus, Amanita rubescens, Russula cyanoxantha, Boletus edulis, Tricholoma equestre, Fistulina hepatica, Cantharellus cibarius, Amanita caesarea and Hydnum rufescens). In order to define qualitative and quantitative profiles, combined fatty acids were hydrolyzed with potassium hydroxide/methanol and all free compounds were derived to their methyl ester forms with methanolic boron trifluoride, followed by analysis by GC-MS. Thirty fatty acids were determined. As far as we know, the fatty acid profiles of A. caesarea and H. rufescens are described for the first time. As for the...
Tipo: Article Palavras-chave: Wild edible mushrooms; Fatty acids; Comparative analysis.
Ano: 2009 URL: http://hdl.handle.net/10198/4409
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Free-radical scavenging capacity and reducing power of wild edible mushrooms from northeast Portugal: individual cap and stipe activity IPB - Escola Superior Agrária
Ferreira, Isabel C.F.R.; Baptista, Paula; Vilas-Boas, Miguel; Barros, Lillian.
The antioxidant properties of two wild edible mushroom species from the northeast of Portugal, Lactarius deliciosus (L.) Gray and Tricholoma portentosum (Fr.) Que´l., were evaluated. Methanolic extracts from the entire mushroom, the cap and the stipe, separately, were screened for their reducing power and free radical scavenging capacity by chemical assays. The total phenolic content was determined, in order to assess its effect on the extract’s antioxidant activity. Both two species showed antioxidant potential; but L. deliciosus proved to be more active. The portion of the mushroom used had an influence on the results obtained, with the cap methanolic extracts exhibiting the greatest antioxidant effect.
Tipo: Article Palavras-chave: Wild edible mushrooms; Lactarius deliciosus; Tricholoma portentosum; Scavenging effect; Reducing power; Total phenols.
Ano: 2007 URL: http://hdl.handle.net/10198/831
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Metabolite profiling of wild edible mushrooms species IPB - Escola Superior Agrária
Valentão, P.; Ribeiro, Bárbara; Pinho, P. Guedes de; Baptista, Paula; Andrade, P.B..
Mushrooms are of increasing importance in modern nutrition and medicine. Trás-os-Montes region (north-eastern Portugal) is known for the variety of its soils and diversity of climate conditions. This variability assumes an important role in mushroom production, explaining why this region is recognized as one of the richest ones in wild edible species. A metabolomics approach was applied to twelve wild edible mushroom species (Suillus bellini, Suillus luteus, Suillus granulatus, Hygrophorus agathosmus, Amanita rubescens, Russula cyanoxantha, Boletus edulis, Tricholoma equestre, Fistulina hepatica, Cantharellus cibarius, Amanita caesarea and Hydnum rufescens) collected in this area, with the purposes of improving the knowledge about their chemical profiles...
Tipo: ConferenceObject Palavras-chave: Wild edible mushrooms; Metabolomics.
Ano: 2010 URL: http://hdl.handle.net/10198/4494
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Quantitation of nine organic acids in wild mushrooms IPB - Escola Superior Agrária
Valentão, P.; Lopes, Graciliana; Valente, Miguel; Barbosa, Paula; Andrade, P.B.; Silva, B.M.; Baptista, Paula; Seabra, R.M..
The organic acids composition of six wild edible mushroom species ( Amanita caesarea, Boletus edulis, Gyroporus castaneus, Lactarius deliciosus, Suillus collinitus, and Xerocomus chrysenteron) was determined by an HPLC-UV detector method. The results showed that all of the samples presented a profile composed of at least five organic acids: citric, ketoglutaric, malic, succinic, and fumaric acids. Several samples also contained oxalic, ascorbic, quinic, and shikimic acids. In a general way, the quantitation of the identified compounds indicated that malic acid, followed by the pair citric plus ketoglutaric acids, were the main compounds in the analyzed species, with the exception of A. caesarea, in which malic and ascorbic acids were the most abundant...
Tipo: Article Palavras-chave: Organic acids; Wild edible mushrooms; Amanita caesarea; Boletus edulis; Gyroporus castaneus; Lactarius deliciosus; Suillus collinitus; Xerocomus chrysenteron.
Ano: 2005 URL: http://hdl.handle.net/10198/939
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Towards chemical and nutritional inventory of Portuguese wild edible mushrooms in different habitats IPB - Escola Superior Agrária
Pereira, Eliana; Barros, Lillian; Martins, Anabela; Ferreira, Isabel C.F.R..
Mushrooms have been valued as highly tasty/nutritional foods and as a source of compounds with medicinal properties. The huge mushrooms reservoir of Northeast Portugal must be chemically and nutritionally characterized for the benefit of populations and for the genetic conservation of wild macrofungi. Herein, a chemical, nutritional and bioactive inventory of potentially interesting species (and not yet characterized in literature) from different habitats (Castanea sativa, Pinus sp., Quercus sp., fields and mixed stands) was performed. Besides macronutrients with a well-balanced proportion, the studied wild mushrooms have also important micronutrients (vitamins) and non-nutrients (phenolics) with bioactive properties such as antioxidant potential....
Tipo: Article Palavras-chave: Wild edible mushrooms; Chemical inventory; Proximate composition; Fatty acids; Sugars; Vitamins.
Ano: 2011 URL: http://hdl.handle.net/10198/6235
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Wild edible mushrooms structural portions: chemical composition and antioxidant potential IPB - Escola Superior Agrária
Ribeiro, Bárbara; Lopes, Rosário; Gonçalves, Rui; Quelhas, Inês; Andrade, P.B.; Seabra, R.M.; Baptista, Paula; Valentão, P..
The organic acids and phenolics composition of entire wild edible mushrooms (Russula cyanoxantha, Amanita rubescens, Suillus granulatus and Boletus edulis) and correspondent cap and stipe was determined by HPLC-UV and HPLC-DAD, respectively. Their antioxidant potential was assessed by their % DPPH scavenging activity. The results showed that all of the species presented profile composed at least five organic acids: oxalic, citric, malic, quinic and fumaric acids. Ascorbic, succinic and shikimic acids also appeared in some of them. A. rubescens present the highest organic acids content, followed by B. edulis, R. cyanoxantha and S. granulatus. The results indicated that quinic acid, followed by malic or citric acids were the major compounds. In a general...
Tipo: ConferenceObject Palavras-chave: Organic acids; Phenolics; Wild edible mushrooms; Cap and stipe.
Ano: 2007 URL: http://hdl.handle.net/10198/5724
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