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Tipo do documento Info:eu-repo/semantics/article (21) Info:eu-repo/semantics/other (1) Journal article (1) Ano 2019 (1) 2016 (2) 2015 (1) 2014 (2) 2011 (4) 2009 (2) 2008 (1) 2006 (1) 2005 (1) 2004 (3) 2003 (3) 2002 (5) 2001 (2) 1999 (1) 1998 (1) Mais... País Brazil (23) Japan (6) Chile (1) Idioma Inglês (23) Japonês (6) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 30 Primeira ... 1 2 ... Última Application of decolourized and partially purified polygalacturonase and α-amylase in apple juice clarification BJM Dey,Tapati Bhanja; Banerjee,Rintu. Polygalacturonase and α-amylase play vital role in fruit juice industry. In the present study, polygalacturonase was produced by Aspergillus awamori Nakazawa MTCC 6652 utilizing apple pomace and mosambi orange (Citrus sinensis var mosambi) peels as solid substrate whereas, α-amylase was produced from A. oryzae (IFO-30103) using wheat bran by solid state fermentation (SSF) process. These carbohydrases were decolourized and purified 8.6-fold, 34.8-fold and 3.5-fold, respectively by activated charcoal powder in a single step with 65.1%, 69.8% and 60% recoveries, respectively. Apple juice was clarified by these decolourized and partially purified enzymes. In presence of 1% polygalacturonase from mosambi peels (9.87 U/mL) and 0.4% α-amylase (899 U/mL), maximum... Tipo: Info:eu-repo/semantics/article Palavras-chave: Polygalacturonase; Α-amylase; Activated charcoal; Decolourization; Apple juice clarification. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100014 Biotechnological potential of alternative carbon sources for production of pectinases by Rhizopus microsporus var. rhizopodiformis BABT Damásio,André Ricardo de Lima; Maller,Alexandre; Silva,Tony Márcio da; Jorge,João Atílio; Terenzi,Hector Francisco; Polizeli,Maria de Lourdes Teixeira de Moraes. Fungi collected from Brazilian soil and decomposing plants were screened for pectinase production. R. microsporus var. rhizopodiformis was the best producer and was selected to evaluate the pectic enzyme production under several nutritional and environmental conditions. The pectinase production was studied at 40ºC, under 28 carbon sources-supplemented medium. The inducer effect of several agro-industrial residues such as sugar cane bagasse, wheat flour and corncob on polygalacturonase (PG) activity was 4-, 3- and 2-fold higher than the control (pectin). In glucose-medium, a constitutive pectin lyase (PL) activity was detected. The results demonstrated that R. microsporus produced high levels of PG (57.7 U/mg) and PL (88.6 U/mg) in lemon peel-medium. PG had... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agro industrial residues; Lemon peel; Pectin lyase; Polygalacturonase; R. microsporus var. rhizopodiformis. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100019 Characterization of ‘Sabará’ Jabuticabas at different maturation stages Agronomy Becker, Fernanda Salamoni; Vilas Boas, Ana Carolina; Sales, Adones; Tavares, Lucas Silveira; Siqueira, Heloisa Helena de; Vilas Boas, Eduardo Valério de Barros. This work aimed to evaluate the physicochemical characteristics and enzymatic activity of “Sabará” jabuticaba fruits, which were cultivated in Lavras, Minas Gerais State, Brazil, at different maturation stages. The fruits were harvested and separated into five different stages: totally green fruit, fruit with incipient pigmentation, fruit with a light purple predominance, totally purple fruit and totally dark purple fruit. These fruits were physicochemically analyzed and evaluated for polygalacturonase enzymatic activity. Chlorophyll degradation and the synthesis of anthocyanin on fruit rinds were observed, as well as the degradation of the cell wall and its consequent softening. In the pulp, increased soluble solids, pH and sugars were observed, while... Tipo: Info:eu-repo/semantics/article Palavras-chave: 50700006 CIÊNCIA E TECNOLOGIA DE ALIMENTOS 50701045 FISIOLOGIA PÓS-COLHEITA Myrciaria jaboticaba; Pectin; Polygalacturonase; Chlorophyll; Anthocyanin. FISIOLOGIA PÓS-COLHEITA. Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19499 Cold adaptation of polygalacturonase activity from the culture of the psychrophilic snow mold Sclerotinia borealis OAK 竹内, 宏治; 井熊, 武志; 匂坂, 慶子; 斉藤, 泉; 髙澤, 俊英; TAKEUCHI, Kouji; IKUMA, Takeshi; SAGISAKA, Keiko; SAITO, Izumi; TAKASAWA, Toshihide. Palavras-chave: ポリガラクツロナーゼ; 低温適応; 好冷菌; Sclerotinia borealis; Sclerotinia sclerotiorum; Polygalacturonase; Cold adaptation; Psychrophile. Ano: 2002 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/121 Comparison of acid and enzymatic hydrolysis of pectin, as inexpensive source to cell growth of Cupriavidus necator Anais da ABC (AABC) LOCATELLI,GABRIEL OLIVO; FINKLER,LEANDRO; FINKLER,CHRISTINE L.L.. Abstract: The present work investigated what the appropriate methods of hydrolysis of pectin for reducing compounds (RCs) production, employed as a substrate for cell growth of Cupriavidus necator. This microorganism has great importance industrial, because besides potential single cell protein (SCP), is the most studied microorganism for production of polyhydroxybutyrate (PHB), and both processes require high cell concentration with inexpensive substrates For this, it was compared to acid and enzymatic hydrolysis procedures, through rotational central composite experimental design, using pectin concentration (1.0%). It was analyzed as a variable response for both experimental design, the RCs’ production. The best conditions of each procedure were used... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cupriavidus necator; Galacturonic acid; Pectin depolymerization; Pectin hydrolysates; Polygalacturonase. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300605 COMPONENTS OF CELL WALL, ENZYME ACTIVITY IN PEDICEL AND SUSCEPTIBILITY OF BANANAS TO FINGER DROP Rev. Bras. Frutic. RUIZ,GLORIA ANNABELL COBEÑA; SALOMÃO,LUIZ CARLOS CHAMHUM; SIQUEIRA,DALMO LOPES DE; REZENDE,SEBASTIÃO TAVARES DE; LINS,LEILA CRISTINA ROSA DE. ABSTRACT A major problem in post-harvest handling of bananas is the individual detachment of the fruit from the hands. This study aimed to establishing the relationship between carbohydrate concentration and enzyme activity in the pedicel region of three cultivars of bananas, resistant and susceptible to natural dropping, during post-harvest ripening, and the susceptibility of bananas to finger dropping. Cultivars ‘Terra’ (plantain, AAB group) and ‘Prata’ (banana, AAB group) triploids and the ‘Prata Graúda’ (banana, AAAB group) tetraploid were used. The experiment was distributed in split plots, with three plots (cultivars) and five subplots (peel color stages) in a completely randomized design with three replications and three fruits per sample unit.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Musa sp.; Pectinametylesterase; Polygalacturonase; Starch. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000300301 Ethylene, Enzymatic and Respiratory Pattern Evolution in Loquat (Eriobotrya japonica (Thunb.) Lindl.) cv. Golden Nugget in the Last four Sequential Stages of Maturation Chilean J. Agric. Res. Undurraga M,Pedro L; Olaeta C,José A; Cancino,Cristian. There is some controversy regarding the respiratory pattern of loquat (Eriobotrya japonica [Thunb.] Lindl.). Thus in order to provide information on this aspect of loquat, fruit of 50-70 g, from cv. Golden Nugget were harvested in four stages of maturity: green (BBCH 709), color break (BBCH 801), yellow (BBCH 807), and orange (BBCH 809). The parameters evaluated in each stage were: soluble solids, titratable acidity, respiration, ethylene generation, and activity of the enzymes pectin methyl esterase (PME), peroxidase, polyphenoloxidase (PPO), polygalacturonase (PG), and cellulose, and the soluble solids:acidity ratio was calculated. The results show that ethylene concentration increased at the time of color break, which was not the case for the change in... Tipo: Journal article Palavras-chave: Color skin; Peroxidase; CO2; Fruit quality; Polygalacturonase. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400005 Gel mobility shift scanning of pectin-inducible promoter from Penicillium griseoroseum reveals the involvement of a CCAAT element in the expression of a polygalacturonase gene Genet. Mol. Biol. Ribon,Andréa de O.B.; Ribeiro,João Batista; Gonçalves,Daniel B.; Queiroz,Marisa V. de; Araújo,Elza F. de. Previous reports have described pgg2, a polygalacturonase-encoding gene of Penicillium griseoroseum, as an attractive model for transcriptional regulation studies, due to its high expression throughout several in vitro growth conditions, even in the presence of non-inducing sugars such as sucrose. A search for regulatory motifs in the 5' upstream regulatory sequence of pgg2 identified a putative CCAAT box that could justify this expression profile. This element, located 270 bp upstream of the translational start codon, was tested as binding target for regulatory proteins. Analysis of a 170 bp promoter fragment by electrophoretic mobility shift assay (EMSA) with nuclear extracts prepared from mycelia grown in pectin-containing culture medium revealed a high... Tipo: Info:eu-repo/semantics/other Palavras-chave: Penicillium griseoroseum; Polygalacturonase; 5' upstream regulatory sequence; Electrophoretic mobility shift assay. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100019 Influence of medium composition and pH on the production of polygalacturonases by Aspergillus oryzae BABT Malvessi,Eloane; Silveira,Mauricio Moura da. A liquid medium containing wheat bran, salts and a source of inducer (pectin) was found to be suitable for the production of exo- and endo-polygalacturonases by Aspergillus oryzae CCT3940. Induction of polygalacturonases by purified pectin was significantly higher than when rinds of citrus fruits were used as inducer. A. oryzae growth was favoured by pH close to 4, although a drop of pH to around 3 was needed for enzymes production. Afterwards, decreasing activities were observed with the normal increase in pH to near neutrality. The highest activities were achieved with an initial pH of 4 and controlled when it decreased to a value slightly below 3 (159 units endo-PG.mL-1 at 83 h and 45 units exo-PG.mL-1 at 64 h), being the loss in polygalacturonases... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pectinase; Polygalacturonase; Submerged process; Production medium; PH. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500004 Influence of metal ions on pellet morphology and polygalacturonase synthesis by Aspergillus niger 3T5B8 BJM Couri,Sônia; Pinto,Gustavo Adolfo Saavedra; Senna,Lilian Ferreira de; Martelli,Hebe Labarthe. The effects of cations addition on pellet morphology and polygalacturonase (PG) synthesis by Aspergillus niger 3T5B8 were studied and compared with a control system. Fe(II), Cu(II), Zn(II) and Mn(II) were added to the fermentation medium separately, and also as combined groups of cations. The addition of Fe2+ and/or Zn2+ ions was significantly positive to the enzyme production. A positive effect in the biomass content, however, was only obtained when the same metal ions were added separately. On the other hand, Cu2+ and Mn2+ ions had almost no effect on these parameters. The morphology of the pellets was studied by image processing techniques. Small pellets with small cores were usually obtained when Fe2+ and Zn2+ ions were individually or collectively... Tipo: Info:eu-repo/semantics/article Palavras-chave: Metal ions; Polygalacturonase; Pellet morphology. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000100005 Isolation of polygalacturonase I from the culture of the psychrophilic snow mold Sclerotinia borealis OAK 高橋, 裕司; 井熊, 武志; 匂坂, 慶子; 斉藤, 泉; 髙澤, 俊英; TAKAHASHI, Yuji; IKUMA, Takeshi; SAGISAKA, Keiko; SAITO, Izumi; TAKASAWA, Toshihide. Palavras-chave: Sclerotinia borealis; 好冷菌; 雪腐菌核病菌; ポリガラクツロナーゼ; 細胞壁分解酵素; Psychrophile; Snow mold; Cell wall degrading enzyme; Polygalacturonase. Ano: 2002 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/120 Novel process for the simultaneous extraction and degumming of banana fibers under solid-state cultivation BJM Jacob,Nicemol; Prema,Parukuttyamma. Various process parameters for the production of polygalacturonase by Streptomyces lydicus under solid-state fermentation were optimized. The optimum particle size of wheat bran for polygalacturonase production was in the range of 500-1000 µm. Initial moisture content of 70% was found to be the optimum for enzyme production. The most suitable inoculum size was 1.25 x 10(5) CFU/mL and the optimum incubation temperature was 30ºC. Addition of carbon sources resulted in 37% increase in enzyme yield (425 U/g), whereas no significant enhancement was obtained on nitrogen supplementation. Maximum enzyme yield was recorded at 72 h. When compared to the initial production medium (108.5 U/g), the enzyme yield was 3.9 fold after optimization. Solid-state fermentation... Tipo: Info:eu-repo/semantics/article Palavras-chave: Banana fiber degumming; Solid-state fermentation; Polygalacturonase; Streptomyces lydicus; Wheat bran. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000100025 Partial purification and characterization of exopolygalacturonase II and III of Penicillium frequentans BJM Barense,Renata I.; Chellegatti,Maria Angélica dos S.C.; Fonseca,Maria José V.; Said,Suraia. Previous studies from our laboratory have demonstrated that the fungus Penicillium frequentans produces high levels of polygalacturonase and pectinesterase. Endopolygalacturonase I (Endo-PG I) and Exopolygalacturonase I (Exo-PG I) were previously purified and characterized. In the present study two extracellular polygalacturonases were separated, partially purified and biochemically characterized. Both were characterized as exopolygalacturonases so they were named exopolygalacturonase II (Exo-PG II) and exopolygalacturonase III (Exo-PG III) which had a molecular mass of 63 kDa (Exo-PG II) and 79 kDa (Exo-PG III). The Km values were 1.6 and 0.059 g/L and the Vmax values were 2571 and 185 U/mg, respectively. The optimum temperature was 50ºC for both enzymes,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Exopolygalacturonase; Pectinase; Polygalacturonase; Penicillium frequentans. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000400014 Pectin degradation in ripening and wounded fruits Rev. Bras. Fisiol. Veg. HUBER,DONALD J.; KARAKURT,YASAR; JEONG,JIWON. Pectin depolymerization during fruit ripening has been shown to be largely due to pectinolytic enzymes, including polygalacturonases (E.C. 3.2.1.15) and pectinmethylesterases (E.C. 3.2.1.11). Studies have shown that these enzymes are not the primary determinants of softening, although participation in texture changes during the late stages of ripening seems evident. Pectin depolymerization differs significantly between various fruit types, notably avocado and tomato, even though levels of extractable PG activity in these fruits are similar. Collective evidence indicates that the activities of some cell wall enzymes are restricted in vivo, with maximum hydrolytic potential expressed only in response to tissue disruption or wounding. In contrast, other... Tipo: Info:eu-repo/semantics/article Palavras-chave: Apoplast; Lipids; Membranes; Oligogalacturonides; Pectin fragments; Polygalacturonase; Radical oxygen species. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000200009 Pectinase and polygalacturonase production by a thermophilic Aspergillus fumigatus isolated from decomposting orange peels BJM Phutela,Urmila; Dhuna,Vikram; Sandhu,Shobhna; Chadha,B.S.. A thermophilic fungal strain producing both pectinase and polygalacturonase was isolated after primary screening of 120 different isolates. The fungus was identified as Aspergillus fumigatus Fres. MTCC 4163. Using solid-state cultivation, the optimum levels of variables for pectinase and polygalacturonase (PG) production were determined. Maximal levels of enzyme activities were achieved upon growing the culture in a medium containing wheat bran, sucrose, yeast extract and (NH4)2SO4 after 2-3 days of incubation at a temperature of 50ºC. Highest enzyme activities of 1116 Ug-1 for pectinase and 1270 Ug-1 for polygalacturonase were obtained at pH 4.0 and 5.0, respectively. Tipo: Info:eu-repo/semantics/article Palavras-chave: Thermophilic fungi; Pectinase; Polygalacturonase. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000100013 Pectinase production by fungal strains in solid-state fermentation using agro-industrial bioproduct BABT Martin,Natalia; Souza,Simone Regina de; Silva,Roberto da; Gomes,Eleni. Pectin lyase and polygalacturonase production by newly isolated fungal strains was carried out in solid-state fermentation. Moniliella SB9 and Penicillium sp EGC5 produced polygalcturonase (PG) and pectin lyase (PL) on mixture of orange bagasse, sugar cane bagasse and wheat bran as substrate. PG and PL produced by Moniliella presented optimum activity at pH 4.5 and 10.0 and at 55 and 45°C, respectively, while these enzymes from Penicillium sp presented optimum activity at pH 4.5-5.0 and 9.0 and 40°C, respectively. Tipo: Info:eu-repo/semantics/article Palavras-chave: Penicillium; Moniliella; Polygalacturonase; Pectin lyase. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500018 Production and partial characterization of polygalacturonases produced by thermophilic Monascus sp N8 and by thermotolerant Aspergillus sp N12 on solid-state fermentation BJM Freitas,Paula Mendes de; Martin,Natalia; Silva,Dênis; Silva,Roberto da; Gomes,Eleni. Polygalacturonases production by newly isolated Monascus sp N8 and Aspergillus sp N12 strains was carried out in solid-state fermentation using mixtures of wheat bran, sugar cane bagasse and orange bagasse as carbon sources. The maximal activity values of exo-polygalacturonases (exo-Pg) from Monascus sp and Aspergillus sp were obtained using wheat bran/sugar cane bagasse/orange bagasse mixture (6.6 U/mL) and wheat bran/orange bagasse mixture (10 U/mL), respectively. Enzyme production by both strains was higher at 45ºC after 72 h and 1.6 U/mL at 50ºC after 120 h. Endo-polygalacturonase (endo-Pg) production was higher in wheat bran/orange bagasse mixture and was not affected by temperature of incubation for both fungi. Endo-Pg production by Monascus was 1.8... Tipo: Info:eu-repo/semantics/article Palavras-chave: Monascus sp; Aspergillus sp; Thermophilic; Polygalacturonase; Solid-state fermentation. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000300019 Production of pectinases by A. niger: influence of fermentation conditions BABT Martos,María A.; Martinez Vazquez,Francisco; Benassi,Fernando O.; Hours,Roque A.. Response surface methodology was used for optimization of polygalacturonase (PG) and pectinesterase (PE) production in submerged fermentation by A.niger. A Central Composite Experimental Design was applied, consisting of 22 experiments, including eight central points. Variables studied were: fermentation time (24 to 120 h), pH (3.5 to 6.5) and initial concentration of pectin (5 to 20 g/l). Maximum PE production was 220 U/l, after 74 h of culture, in a medium containing 20 g/l of pectin (pH 6.5). The optimal conditions for PG production were pH: 4.1, 20 g/l of pectin and 94 h of fermentation with a maximum value of 1032 U/l. Under these conditions, the PE production was low (15 U/l). A liquid extract with high PG activity and low PE activity could be... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pectinases; Polygalacturonase; Pectinesterase; Aspergillus niger; Response surface methodology; Citrus pectin. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300007 Production, purification and characterization of an exo-polygalacturonase from Penicillium janthinellum sw09 Anais da ABC (AABC) MA,YUPING; SUN,SIWEN; HAO,HUI; XU,CHUNPING. ABSTRACT A soil isolate, Penicillium janthinellum sw09 has been found to produce significant amounts of an extracellular pectinase subsequently characterized as exo-polygalacturonase (exo-PG). By optimizing growth conditions, P. janthinellum sw09 produced high amount of exo-PG (16.54 units/mL). The crude enzyme was purified by gel filtration chromatography and two exo-PG activity peaks (designated as PGI and PGII) were revealed. On SDS-PAGE analysis, purified PGII using DEAE-Sepharose FF column, was found to be a single band with a molecular mass of 66.2 kDa. The purified PGII exhibited maximal activity at the temperature of 45 oC and pH 5.0. The stability profiles show that PGII is more stable in the pH range of 4.0-8.0 and below 60 oC. The Km and Vmax... Tipo: Info:eu-repo/semantics/article Palavras-chave: Penicillium janthinellum; Polygalacturonase; Purification; Characterization. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200479 Purification and Characterization of a Polygalacturonase Produced by Wickerhamomyces anomalus BABT Martos,María Alicia; Butiuk,Ana Paula; Rojas,Natalia Lorena; Hours,Roque Alberto. The aim of this work was to study the purification and physicochemical properties of an endo-polygalacturonase (PG) produced by Wickerhamomyces anomalus isolated from the citrus fruit peels. The enzyme was purified to homogeneity from the culture filtrate of W. anomalus grown on the yeast nitrogen base medium with glucose as carbon and energy source and citrus pectin as inductor. After anion-exchange chromatography and gel filtration chromatography, PG activity was eluted as a single peak, yielding 21% of the original activity. After dialysis and cation-exchange chromatography, only one fraction with PG activity was obtained, recovering 56% of initial enzyme activity and 1.3-fold increase in specific activity. The molecular weight of the enzyme was... Tipo: Info:eu-repo/semantics/article Palavras-chave: Wickerhamomyces anomalus; Polygalacturonase; Purification; Characterization. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000400587 Registros recuperados: 30 Primeira ... 1 2 ... Última

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