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Registros recuperados: 6
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Growth of in vitro Fusarium oxysporum f. sp. niveum in chemically defined media amended with gallic acid Biol. Res.
WU,HONG-SHENG; WANG,YANG; ZHANG,CHAO-YONG; BAO,WEI; LING,NING; LIU,DONG-YANG; SHEN,QI-RONG.
Gallic acid was artificially added to the media to grow Fusarium oxysporum f.sp.niveum to investigate its effect on the pathogenic fungus. Results indicate that gallic acid inhibited the growth of F. oxysporum f.sp.niveum. The colony diameter, the conidia germinating rate and the conidia yield were reduced by 5.7-22.9%%, 35.8-55.6% and 38.9-62.2% respectively. However, the virulence factors by the fungus were stimulated. The activity of pectinase, proteinase and cellulase increased by 12.3-627.8%, 11.8-41.2% and 0.5-325.0% respectively, while the activity of amylase increased slightly. The results suggest that gallic acid repressed growth but facilitated the relative pathogenicity of invading pathogens.
Tipo: Journal article Palavras-chave: Allelopathy; Gallic acid; Fusarium oxysporum f. sp. niveum; Plant-microbe interaction; Virulent factors.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000300004
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Modeling gallic acid production rate by empirical and statistical analysis BABT
Kar,Bratati; Banerjee,Rintu; Bhattacharyya,Bimal Chandra.
For predicting the rate of enzymatic reaction empirical correlation based on the experimental results obtained under various operating conditions have been developed. Models represent both the activation as well as deactivation conditions of enzymatic hydrolysis and the results have been analyzed by analysis of variance (ANOVA). The tannase activity was found maximum at incubation time 5 min, reaction temperature 40ºC, pH 4.0, initial enzyme concentration 0.12 v/v, initial substrate concentration 0.42 mg/ml, ionic strength 0.2 M and under these optimal conditions, the maximum rate of gallic acid production was 33.49 mumoles/ml/min.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gallic acid; Modeling; Tannase; Caesalpinia digyna.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000500010
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Effect of JJYMD-C, a novel synthetic derivative of gallic acid, on proliferation and phenotype maintenance in rabbit articular chondrocytes in vitro BJMBR
Xu,G.J.; Lu,Z.H.; Lin,X.; Lin,C.W.; Zheng,L.; Zhao,J.M..
Tissue engineering encapsulated cells such as chondrocytes in the carrier matrix have been widely used to repair cartilage defects. However, chondrocyte phenotype is easily lost when chondrocytes are expanded in vitro by a process defined as “dedifferentiation”. To ensure successful therapy, an effective pro-chondrogenic agent is necessary to overcome the obstacle of limited cell numbers in the restoration process, and dedifferentiation is a prerequisite. Gallic acid (GA) has been used in the treatment of arthritis, but its biocompatibility is inferior to that of other compounds. In this study, we modified GA by incorporating sulfamonomethoxine sodium and synthesized a sulfonamido-based gallate, JJYMD-C, and evaluated its effect on chondrocyte metabolism....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sulfamonomethoxine sodium; Gallic acid; Pro-chondrogenic agent; Chondrocyte; Rabbit articular cartilage; Dedifferentiation.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000800637
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A new approach to microbial production of gallic acid BJM
Bajpai,Bhakti; Patil,Shridhar.
In a new approach to microbial gallic acid production by Aspergillus fischeri MTCC 150, 40gL-1 of tannic acid was added in two installments during the bioconversion phase of the process (25gL-1 and 15gL-1 at 32 and 44h respectively). The optimum parameters for the bioconversion phase were found to be temperature: 35ºC, pH: slightly acidic (3.3-3.5), aeration: nil and agitation: 250 rpm. A maximum of 71.4% conversion was obtained after 71h fermentation with 83.3% product recovery. The yield was 7.35 g of gallic acid per g of biomass accumulated and the fermenter productivity was 0.56 g of gallic acid produced per liter of medium per hour.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tannase; Gallic acid; Tannic acid; Aspergillus fischeri.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400021
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Characterization of a thermostable extracellular tannase produced under submerged fermentation by Aspergillus ochraceus Electron. J. Biotechnol.
Gonçalves,Heloísa Bressan; Riul,Alana Jacomini; Quiapim,Andréa Carla; Jorge,João Atílio; Guimarães,Luis Henrique Souza.
Background: Tannases are enzymes that may be used in different industrial sectors as, for example, food and pharmaceutical. They are obtained mainly from microorganisms, as filamentous fungi. However, the diversity of fungi stays poorly explored for tannase production. In this article, Aspergillus ochraceus is presented as a new source of tannase with interesting features for biotechnological applications. Results: Extracellular tannase production was induced when the fungus was cultured in Khanna medium with tannic acid as carbon source. The extracellular tannase was purified 9-fold with 2% recovery and a single band corresponding to 85 kDa was observed in SDS-PAGE. The native apparent molecular mass was estimated as 112 kDa. Optima of temperature and pH...
Tipo: Journal article Palavras-chave: Aspergillus ochraceus; Gallic acid; Tannase; Tannic acid; Tannin acyl hydrolase.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000500004
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Changes in composition, antioxidant content, and antioxidant capacity of coffee pulp during the ensiling process R. Bras. Zootec.
Rios,Teodulo Salinas; Torres,Teresa Sánchez; Cerrilla,María Esther Ortega; Hernández,Marcos Soto; Cruz,Antonio Díaz; Bautista,Jorge Hernández; Cuéllar,Cuauhtémoc Nava; Huerta,Humberto Vaquera.
The objective of the present study was to determine the nutritive value, the presence of antioxidant compounds, and the antioxidant capacity of coffee pulp ensiled or non-ensiled. Dry matter (DM), crude protein (CP), ash, acid detergent fiber (ADF), neutral detergent fiber (NDF), and lignin, as well as the antioxidant compounds present in coffee pulp and their antioxidant capacity, were determined. A completely randomized design was used. Data were analyzed by analysis of variance. Ensiling of coffee pulp increased the CP content from 98.6 to 111.6 g kg−1 DM, NDF from 414.6 to 519.5 g kg−1 DM, ADF from 383.9 to 439.3 g kg−1 DM, and lignin from 122.9 to 133.6 g kg−1 DM. Caffeine decreased from 5.72 to 5.02 mg g−1 DM. Three antioxidant compounds were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Caffeic; Caffeine; Chlorogenic; Gallic acid; Silage; Trolox.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000900492
Registros recuperados: 6
Primeira ... 1 ... Última
 

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