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Registros recuperados: 15
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A QCAR model for predicting antioxidant activity of wild mushrooms IPB - Escola Superior Agrária
Froufe, Hugo J.C.; Abreu, Rui M.V.; Ferreira, Isabel C.F.R..
Wild mushrooms have been described as sources of natural antioxidants, particularly phenolic compounds. However, many other compounds present in wild mushrooms can also act as antioxidants (reducers), so whole extracts from a wide range of species need to be examined. To gain further knowledge in this area, the relationship between the antioxidant potential (scavenging effect and reducing power) and chemical composition of twenty three samples from seventeen Portuguese wild mushroom species was investigated. A wide range of analytical parameters reported by our research group (including ash, carbohydrates, proteins, fat, monounsaturated fatty acids, polyunsaturated fatty acids, saturated fatty acids, phenolics, flavonoids, ascorbic acid and -carotene)...
Tipo: Article Palavras-chave: Wild mushrooms; Chemical composition; Antioxidant activity; QCAR; PLS.
Ano: 2009 URL: http://hdl.handle.net/10198/2615
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Antioxidant capacity of several Iranian, wild and cultivated strains of the button mushroom BJM
Tajalli,Faezeh; Malekzadeh,Khalil; Soltanian,Hadi; Janpoor,Javad; Rezaeian,Sharareh; Pourianfar,Hamid R..
The white button mushroom, Agaricus bisporus, is the most commonly grown mushroom in Iran; however, there is a significant shortage of research on its antioxidant activity and other medicinal properties. The aim of this study was to evaluate antioxidant capacity of the methanolic extracts from four cultivated strains and four Internal Transcribed Spacer (ITS)-identified, Iranian wild isolates of A. bisporus. Evaluations were made for total phenols, flavonoids and anthocyanins, and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity. Overall, results showed that all the wild isolates exhibited significantly lower DPPH-derived EC50, compared to the cultivated strains (p < 0.05). A relatively high relationship was observed between total phenols and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agaricus bisporus; Antioxidant capacity; Wild mushrooms; Methanolic extract; Anthocyanins.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300769
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Antioxidant potential and relation with chemical composition of wild edible mushrooms cap and stipe IPB - Escola Superior Agrária
Ribeiro, Bárbara; Lopes, Rosário; Andrade, P.B.; Seabra, R.M.; Gonçalves, Rui; Baptista, Paula; Valentão, P..
Tipo: ConferenceObject Palavras-chave: Organic acids; Phenolics composition; Alkaloids; Wild mushrooms.
Ano: 2008 URL: http://hdl.handle.net/10198/5736
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Biomolecule profiles in inedible wild mushrooms with antioxidant value IPB - Escola Superior Agrária
Reis, Filipa S.; Pereira, Eliana; Barros, Lillian; Sousa, Maria João; Martins, Anabela; Ferreira, Isabel C.F.R..
The use of natural products isolated from mushrooms, included inedible species, against infection, cancer diseases and other oxidative-stress related diseases is one of the cornerstones of modern medicine. In the present work, the antioxidant molecule profiles of inedible mushroom species were evaluated and compared with those of edible species. The order of antioxidant abundance found in inedible wild mushrooms was: phenolics > flavonoids > ascorbic acid > tocopherols > carotenoids, similar to that of edible species. Furthermore the same energetic biomolecules were found including the disaccharide trehalose, the monosaccharide alcohol derivative mannitol and the fatty acids palmitic, oleic and linoleic acids. Fomitopsis pinicola revealed a...
Tipo: Article Palavras-chave: Wild mushrooms; Biomolecules; Antioxidants; Antioxidant activity.
Ano: 2011 URL: http://hdl.handle.net/10198/6033
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Estudio etnomicológico y biotecnológico de hongos silvestres comestibles ectomicorrízicos en Pinus pseudostrobus y evaluación de bacterias promotoras de crecimiento vegetal. Colegio de Postgraduados
Jiménez Ruiz, Mario.
Los hongos comestibles silvestres son un recurso forestal no maderable que ha sido consumido por su alto contenido nutrimental y utilizado en medicina tradicional desde épocas prehispánicas en México. Adicionalmente, México constituye un importante reservorio de dichos hongos a nivel mundial. En el presente trabajo, se efectuaron estudios etnomicológicos de hongos comestibles silvestres comercializados en Valles Centrales, Oaxaca, para determinar el uso potencial de las especies. Además, se estudió la ontogenia de la ectomicorriza de Laccaria proxima con Pinus pseudostrobus en condiciones de invernadero y se evaluó el efecto de bacterias promotoras de crecimiento vegetal en la inducción del crecimiento hifal de Suillus aff. pseudobrevipesa nivel In vitro....
Palavras-chave: Etnomicología; Hongos comestibles silvestres; Pinus pseudostrobus; Bacterias promotoras de crecimiento vegetal; Ecosistemas forestales; Ectomicorriza; Ethnomycology; Wild mushrooms; Pine pseudostrobus; Plant growth promoting bacteria; Forest ecosystems; Ectomycorrhizae; Maestría; Edafología.
Ano: 2011 URL: http://hdl.handle.net/10521/460
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Estudio etnomicológico y biotecnológico de hongos silvestres comestibles ectomicorrízicos en Pinus pseudostrobus y evaluación de bacterias promotoras de crecimiento vegetal. Colegio de Postgraduados
Jiménez Ruiz, Mario.
Los hongos comestibles silvestres son un recurso forestal no maderable que ha sido consumido por su alto contenido nutrimental y utilizado en medicina tradicional desde épocas prehispánicas en México. Adicionalmente, México constituye un importante reservorio de dichos hongos a nivel mundial. En el presente trabajo, se efectuaron estudios etnomicológicos de hongos comestibles silvestres comercializados en Valles Centrales, Oaxaca, para determinar el uso potencial de las especies. Además, se estudió la ontogenia de la ectomicorriza de Laccaria proxima con Pinus pseudostrobus en condiciones de invernadero y se evaluó el efecto de bacterias promotoras de crecimiento vegetal en la inducción del crecimiento hifal de Suillus aff. pseudobrevipesa nivel In vitro....
Palavras-chave: Etnomicología; Hongos comestibles silvestres; Pinus pseudostrobus; Bacterias promotoras de crecimiento vegetal; Ecosistemas forestales; Ectomicorriza; Ethnomycology; Wild mushrooms; Pine pseudostrobus; Plant growth promoting bacteria; Forest ecosystems; Ectomycorrhizae; Maestría; Edafología.
Ano: 2011 URL: http://hdl.handle.net/10521/460
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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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Free radical scavenging and antimicrobial properties of extracts of wild mushrooms BJM
Oyetayo,V.O..
Antioxidant and antimicrobial potentials of extracts obtained from four wild mushrooms, Termitomyces clypeatus (TCE), Termitomyces robustus (TRE), Lentinus subnudus (LSE) and Lenzites species (LZE) collected in Nigeria were investigated. LSE and LZE displayed good scavenging activity against 2, 2-Diphenyl-1-Picrylhydrazyl (DPPH) and ferrous ion radicals at concentration of 2 mg/mL. However, TRE and TCE exhibited better superoxide anion scavenging effect at 2 mg/mL. All extracts (TCE, TRE, LSE and LZE) had comparable scavenging effect on hydroxyl radicals as butylated Hydroxytoluene (BHT) used as control. Moreover, extracts from the wild mushrooms were able to inhibit the growth of all indicator organisms at concentrations between 12.5 mg/mL to 100 mg/mL....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wild mushrooms; Antimicrobial activity; Free radical scavenging.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000200031
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Phenolic acids determination by HPLC-DAD-ESI/MS in sixteen different portuguese wild mushrooms species IPB - Escola Superior Agrária
Barros, Lillian; Dueñas, Montserrat; Ferreira, Isabel C.F.R.; Baptista, Paula; Santos-Buelga, Celestino.
Analysis of phenolic compounds in sixteen Portuguese wild mushrooms species has been carried out by high-performance liquid chromatography coupled to photodiode array detector and mass spectrometer (HPLC–DAD–ESI/MS). No flavonoids were detected in the analysed samples, but diverse phenolic acids namely protocatechuic, p-hydroxybenzoic and p-coumaric acids, and two vanillic acid isomers were found and quantified. A related non-phenolic compound, cinnamic acid, was also detected in some samples, being the only compound found in Cantharellus cibarius (14.97 mg/kg, dry matter), Lycoperdon perlatum (14.36 mg/kg) and Macrolepiota procera (21.53 mg/kg). p-Hydroxybenzoic acid was found in the majority of the samples, being the most abundant compound in Agaricus...
Tipo: Article Palavras-chave: Wild mushrooms; Phenolic compounds; HPLC–DAD–ESI/MS.
Ano: 2009 URL: http://hdl.handle.net/10198/2650
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Phenolic profile of seventeen Portuguese wild mushrooms IPB - Escola Superior Agrária
Vaz, Josiana A.; Barros, Lillian; Martins, Anabela; Ferreira, Isabel C.F.R..
Analysis of phenolic compounds in seventeen Portuguese wild mushroom species was 26 carried out by high-performance liquid chromatography coupled to photodiode array 27 detection (HPLC-DAD). Protocatechuic, p-hydroxybenzoic, p-coumaric and cinnamic acid 28 were found and quantified. Fistulina hepatica showed the highest phenolic acids 29 concentration (111.72 mg/Kg, dw) due to the significant contribution of protocatechuic 30 (67.62 mg/Kg) and p-hydroxybenzoic (41.92 mg/kg) acids. The edible mushrooms 31 analyzed could be directly used in the human diet to combat oxidative stress, while 32 inedible species could represent a source of extractable phenolic compounds to be used as 33 additives in the food industry or as components in pharmaceutical and...
Tipo: Article Palavras-chave: Wild mushrooms; Edibility; Phenolic compounds; HPLC-DAD.
Ano: 2011 URL: http://hdl.handle.net/10198/3675
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QCAR models to predict wild mushrooms radical scavenging activity, reducing power and lipid peroxidation inhibition IPB - Escola Superior Agrária
Froufe, Hugo J.C.; Abreu, Rui M.V.; Ferreira, Isabel C.F.R..
Wild mushrooms have become attractive as a source of physiologically beneficial compounds including antioxidants such as phenolic compounds and tocopherols. The concentrations of antioxidant compounds (phenolics and -tocopherol) and EC50 values of antioxidant activity (concentration required to achieve 50% of radical scavenging activity and lipid peroxidation inhibition, or 0.5 of absorbance in reducing power) were analyzed by partial least square (PLS) regression analysis. Three QCAR (Quantitative Composition-Activity Relationship) models were constructed and their robustness and predictability were verified by internal and external cross-validation methods. Antioxidant activity correlated well with phenolics and -tocopherol contents, the major...
Tipo: Article Palavras-chave: Wild mushrooms; Phenolics; Alpha-tocopherol; Antioxidant activity; QCAR; PLS.
Ano: 2011 URL: http://hdl.handle.net/10198/6271
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Targeted metabolites analysis in wild Boletus species IPB - Escola Superior Agrária
Heleno, Sandrina A.; Barros, Lillian; Sousa, Maria João; Martins, Anabela; Santos-Buelga, Celestino; Ferreira, Isabel C.F.R..
In European countries, the edible mushrooms from the Boletus genus are the most frequently harvested of all the forest species gathered in the wild. Their popularity is mainly due to their sensory qualities, in particular aroma, taste and texture. In the present work, a targeted metabolites analysis was performed in six wild Boletus species. The analysis of primary metabolites revealed proteins, carbohydrates, fatty acids, mainly linoleic acid, sugars, mainly mannitol and trehalose, and vitamins (tocopherols and ascorbic acid). Secondary metabolites, such as phenolic acids, were also identified and quantified, and correlated to Boletus antioxidant properties including free radical scavenging activity, reducing power and lipid peroxidation inhibition. As a...
Tipo: Article Palavras-chave: Wild mushrooms; Boletus sp.; Primary/secondary metabolites; Bioactivity.
Ano: 2011 URL: http://hdl.handle.net/10198/6028
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Tocopherols composition of Portuguese wild mushrooms with antioxidant capacity IPB - Escola Superior Agrária
Heleno, Sandrina A.; Barros, Lillian; Sousa, Maria João; Martins, Anabela; Ferreira, Isabel C.F.R..
The antioxidant composition and properties of 18 Portuguese wild mushrooms (Clitocybe alexandri, Cortinarius glaucopus, Fistulina hepatica, Hydnum repandum, Hygrophoropsis aurantiaca, Hypholoma capnoides, Laccaria amethystina, Laccaria laccata, Lactarius aurantiacus, Lactarius salmonicolor, Lepista inversa, Lepista sordida, Mycena rosea, Russula delica, Russula vesca, Suillus collinitus, Suillus mediterraneensis, Tricholoma sulphureum) were evaluated, in order to contribute to the overall characterisation of these products. Their radical-scavenging capacity, reducing power and inhibition of lipid peroxidation measured in liposome solutions was fully studied. Furthermore, the tocopherols composition was determined by HPLC-fluorescence. The analysed...
Tipo: Article Palavras-chave: Wild mushrooms; Tocopherols; HPLC; Antioxidant activity.
Ano: 2010 URL: http://hdl.handle.net/10198/2712
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Volatile composition of three species of wild mushrooms from Trás-os-Montes region using HS-SPME and GC/IT-MS IPB - Escola Superior Agrária
Nogueira, Liliana; Malheiro, R.; Pinho, P. Guedes de; Baptista, Paula.
Trás-os-Montes region is considered one of the richest regions of Portugal concerning the existence of wild mushrooms. In the present work, was studied the volatile profile of three species of wild mushrooms, Hebeloma crustuliniforme, Clitocybe odora and Tricholoma fracticum. These species have different flavours, namely radish-, anise-like odor, and not distinctive or slightly mealy odor, respectively. The volatile fractions were determined in fresh mushrooms by headspace solid-phase microextraction (HS-SPME) combined with gas-chromatography/ion trap-mass spectrometry (GC/IT-MS). Several volatile compounds were identified, belonging to different chemical classes. The three studied mushroom species reported different volatile profiles as presented in...
Tipo: ConferenceObject Palavras-chave: Volatile profile; Wild mushrooms; GC/IT-MS.
Ano: 2010 URL: http://hdl.handle.net/10198/4590
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Wild mushrooms Clitocybe alexandri and Lepista inversa: In vitro antioxidant activity and growth inhibition of human tumour cell lines IPB - Escola Superior Agrária
Vaz, Josiana A.; Heleno, Sandrina A.; Martins, Anabela; Almeida, Gabriela M.; Vasconcelos, M. Helena; Ferreira, Isabel C.F.R..
The in vitro antioxidant and growth inhibitory activity of extracts obtained from two Portuguese wild mushrooms (Clitocybe alexandri and Lepista inversa) was studied in human tumour cell lines. The extracts were phenolic (methanolic and ethanolic) and polysaccharidic (boiling water). The antioxidant activity assays included evaluation of radical-scavenging capacity, reducing power and inhibition of lipid peroxidation measured in liposome solutions. Extract-induced cell growth inhibition was measured in four different tumour cell lines (lung, breast, colon and gastric cancer) using the SRB assay. The polysaccharidic extract oft. inversa was the most potent as antioxidant (EC50 < 1.8 +/- 0.1 mg/ml), while the phenolic ethanolic extract of C alexandri was...
Tipo: Article Palavras-chave: Wild mushrooms; Antioxidant activity; Growth inhibitory activity.
Ano: 2010 URL: http://hdl.handle.net/10198/3037
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