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| Registros recuperados: 42 | |
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| Pinheiro,Eduardo A.A.; Carvalho,Josiwander M.; Santos,Diellem C.P. dos; Feitosa,André O.; Marinho,Patrícia S.B.; Guilhon,Giselle Maria S.P.; Santos,Lourivaldo S.; Souza,Afonso L.D. de; Marinho,Andrey M.R.. |
| The present work reports the isolation of five compounds from Aspergillus sp EJC08 isolated as endophytic from Bauhinia guianensis, a tipical plant of the Amazon. The compounds ergosterol (1), ergosterol peroxide (2), mevalolactone (3), monomethylsulochrin (4) and trypacidin A (5) were isolated by chromatographic procedures and identified by spectral methods of 1D and 2D NMR and MS. Compounds 3, 4 and 5 were tested against Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis and Staphylococcus aureus and showed good activity. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical constituents; Antimicrobial assay; Aspergillus; Bauhinia guianensis. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401247 |
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| Xavier,M.O.; Nogueira,C.E.W.; Meirelles,M.; Fernandes,W.R.; Andreolla,H.; Severo,L.C.; Pasqualotto,A.C.; Meireles,M.C.A.. |
| This study aims to compare the concentration of viable fungi, especially those of the genus Aspergillus in the respiratory tract of stabled horses with and without Recurrent Airway Obstruction (RAO). Thirty two housed horses from four equestrian centers in Brazil were included in the study. These animals were submitted to clinical examination and to a respiratory sample collection. They were categorized into two groups: healthy and RAO-affected horses. Samples obtained by tracheobronchial washes were evaluated for fungal microscopy, quantitative culture and Aspergillus spp. quantification. Eighteen healthy and 14 RAO-affected horses were studied. Fungi were more frequently recovered in the RAO group, in comparison to controls, for both fungal microscopy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus; Tracheobronchial washes; Respiratory allergy. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000501457 |
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| 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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| Madrigal-Arias,Jorge Enrique; Argumedo-Delira,Rosalba; Alarcón,Alejandro; Mendoza-López,Ma. Remedios; García-Barradas,Oscar; Cruz-Sánchez,Jesús Samuel; Ferrera-Cerrato,Ronald; Jiménez-Fernández,Maribel. |
| In an effort to develop alternate techniques to recover metals from waste electrical and electronic equipment (WEEE), this research evaluated the bioleaching efficiency of gold (Au), copper (Cu) and nickel (Ni) by two strains of Aspergillus niger in the presence of gold-plated finger integrated circuits found in computer motherboards (GFICMs) and cellular phone printed circuit boards (PCBs). These three metals were analyzed for their commercial value and their diverse applications in the industry. Au-bioleaching ranged from 42 to 1% for Aspergillus niger strain MXPE6; with the combination of Aspergillus niger MXPE6 + Aspergillus niger MX7, the Au-bioleaching was 87 and 28% for PCBs and GFICMs, respectively. In contrast, the bioleaching of Cu by Aspergillus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioleaching; PCBs; Aspergillus; Gold; WEEE. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300707 |
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| Khosravi,A.R; Minooeianhaghighi,M.H; Shokri,H; Emami,S.A; Alavi,S.M; Asili,J. |
| The goals of this study were to evaluate the effectiveness of Cuminum cyminum, Ziziphora clinopodioides and Nigella sativa essential oils to inhibit the growth of Aspergillus fumigatus and A. flavus and to evoke ultrastructural changes. The fungi were cultured into RPMI 1640 media in the presence of oils at concentrations of 8, 6, 5, 4, 3, 2, 1.5, 1.25, 1, 0.75 and 0.5 mg/ml in broth microdilution and 2, 1.5, 1 and 0.5 mg/ml in broth macrodilution methods with shaking for 48 h at 28ºC. Conidial and mycelial samples exposed to 0.25, 0.5, 1, 1.5 and 2 mg essential oils/ml for 5 days in 2% yeast extract granulated plus 15% Saccharose media were processed for transmission electron microscopy (TEM). Based on broth dilution methods, C. cyminum and to a lesser... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antifungal activity; Essential oil; Cuminum cyminum; Ziziphora clinopodioides; Nigella sativa; Aspergillus. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100027 |
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| Santos,Bruna Silveira Lamanes dos; Gomes,Arthur Filipe Sousa; Franciscon,Emanuele Giuliane; Oliveira,Jean Maikon de; Baffi,Milla Alves. |
| Nineteen fungi and seven yeast strains were isolated from sugarcane bagasse piles from an alcohol plant located at Brazilian Cerrado and identified up to species level on the basis of the gene sequencing of 5.8S-ITS and 26S ribosomal DNA regions. Four species were identified: Kluyveromyces marxianus, Aspergillus niger, Aspergillus sydowii and Aspergillus fumigatus, and the isolates were screened for the production of key enzymes in the saccharification of lignocellulosic material. Among them, three strains were selected as good producers of hemicellulolitic enzymes: A. niger (SBCM3), A. sydowii (SBCM7) and A. fumigatus (SBC4). The best β-xylosidase producer was A. niger SBCM3 strain. This crude enzyme presented optimal activity at pH 3.5 and 55 °C (141... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Β-glucosidase; Β-xylosidase; Xylanase; Aspergillus; Sugarcane bagasse. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300903 |
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| Moreira,Fabiana G.; Lenartovicz,Veridiana; Souza,Cristina G.M. de; Ramos,Edivan P.; Peralta,Rosane M.. |
| The use of a methyl-D-glucoside (alphaMG), a synthetic analogue of maltose, as carbon source and inducer of amylase synthesis to several species of Aspergillus was studied in submerged and solid-state fermentations. Among a group of ten species, A. tamarii, A. fumigatus and A. flavus were able to produce biomass and high specific amylolytic activity in submerged cultures containing alphaMG as the only carbon source. In solid state fermentation, the enrichment of basal wheat bran or corn cob medium with alphaMG increased up to 3 times the production of amylases. In both submerged and solid state fermentations, alphaMG was more effective inducer of amylases than maltose and starch. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amylase; Aspergillus; Solid-state fermentation; Submerged fermentation. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000100004 |
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| Diba,K.; Mirhendi,H.; Kordbacheh,P.; Rezaie,S.. |
| In this study we attempted to modify the PCR-RFLP method using restriction enzyme MwoI for the identification of medically important Aspergillus species. Our subjects included nine standard Aspergillus species and 205 Aspergillus isolates of approved hospital acquired infections and hospital indoor sources. First of all, Aspergillus isolates were identified in the level of species by using morphologic method. A twenty four hours culture was performed for each isolates to harvest Aspergillus mycelia and then genomic DNA was extracted using Phenol-Chloroform method. PCR-RFLP using single restriction enzyme MwoI was performed in ITS regions of rDNA gene. The electrophoresis data were analyzed and compared with those of morphologic identifications. Total of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus; Identification; MwoI. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200018 |
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| Batista,Luís Roberto; Chalfoun,Sara Maria. |
| A incidência de ocratoxina A foi estudada em café mistura, bóia e varrição secas em três tipos de terreiro: terra, cimento e asfalto. Foram analisadas 238 amostras coletadas em 11 municípios da região sul do Estado de Minas Gerais, sendo 35 bóia, 97 - mistura e 106 varrição. Das amostras analisadas, em 40% não foi detectada a presença de ocratoxina A, em 31%, foram detectadas a presença de ocratoxina A em níveis que variaram de 0,1 a 5,0 µg/Kg de café. Estes resultados demonstram que 169 amostras (71%) analisadas estariam dentro dos limites em estudo da Legislação Européia que regulamenta a concentração máxima de ocratoxina A em grãos de café torrado. As espécies de Aspergillus identificadas como produtoras de ocratoxina A foram Aspergillus ochraceus, A.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Café; Ocratoxina A; Aspergillus. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542007000300030 |
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| Registros recuperados: 42 | |
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