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Bioprospection and characterization of the amylolytic activity by filamentous fungi from Brazilian Atlantic Forest Biota Neotropica
Almeida,Paula Zaghetto de; Pereira,Marita Gimenez; Carvalho,Caio Cesar de; Heinen,Paulo Ricardo; Ziotti,Luciana Sobrani; Messias,Josana Maria; Jorge,João Atilio; Polizeli,Maria de Lourdes Teixeira de Moraes.
Abstract Filamentous fungi are widely diverse and ubiquitous organisms. Such biodiversity is barely known, making room for a great potential still to be discovered, especially in tropical environments - which are favorable to growth and species variety. Filamentous fungi are extensively applied to the production of industrial enzymes, such as the amylases. This class of enzymes acts in the hydrolysis of starch to glucose or maltooligosaccharides. In this work twenty-five filamentous fungi were isolated from samples of decomposing material collected in the Brazilian Atlantic Forest. The two best amylase producers were identified as Aspergillus brasiliensis and Rhizopus oryzae. Both are mesophilic, they grow well in organic nitrogen-rich media produce great...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amylase; Filamentous fungi; Aspergillus brasiliensis; Rhizopus oryzae; Glucoamylase; Bioprospection.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000300204
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Effects of ethanol and ultraviolet-c treatments on inactivation of Rhizopus oryzae spores which cause postharvest rot Ciênc. Tecnol. Aliment.
UYAR,Gülsüm Ebru ÖZER; UYAR,Başar.
Abstract Rhizopus oryzae is a filamentous fungi reported as a postharvest pathogen in recent years. Ethanol treatment (0, 10, 20, and 30%) and UVC irradiation (0, 1, 2, 5, 10 minutes) were used both individually and in combination for the inactivation of Rhizopus oryzae spores. Survival ratio of the spores and LD50 values for ethanol and UVC irradiation were determined to quantify the germicidal effect. UVC exposure is found to be significantly more effective than ethanol treatment on the reduction of R. oryzae spore survivability. The combination of UVC exposure and ethanol treatment enhanced the lethality of applying each treatment separately and the enhancement increased as the UVC exposure time and ethanol concentrations increased. The lowest spore...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rhizopus oryzae; Postharvest rot; Ethanol; UVC irradiation.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000300691
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Efficient utilization of agricultural by-products using lactic acid-producing fungi OAK
Oda, Yuji.
2005年8月4日とかちプラザ・レインボーホールで開催、日本ユネスコ国内委員会主催の帯広農村開発教育国際セミナー(OASERD)国際連合ユネスコアジア太平洋地域教育開発計画事業(APEID)シンポジウム「地球にやさしい農業をめざして : 資源リサイクルを利用した持続可能な食糧生産-」講演資料
Palavras-chave: Potato pulp; Lactic acid; Rhizopus oryzae; Amylomyces rouxii.
Ano: 2005 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1897
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Extra-cellular isoamylase production by Rhizopus oryzae in solid-state fermentation of agro wastes BABT
Ghosh,Barnita; Ray,Rina Rani.
Extra-cellular isoamylase was produced by Rhizopus oryzae PR7 in solid-state fermentations of various agro wastes, among which millet, oat, tapioca, and arum (Colocasia esculenta) showed promising results. The highest amount of enzyme production was obtained after 72 h of growth at 28°C. The optimum pH for enzyme production was - 8.0. Among the various additives tested, enzyme production increased with ions such as Ca2+, Mg2+ and also with cysteine, GSH, and DTT. The enzyme synthesis was reduced in the presence of thiol inhibitors like Cu2+ and pCMB. The surfactants like Tween-40, Tween-80 and Triton X-100 helped in enhancing the enzyme activity. The production could be further increased by using the combinations of substrates. The ability to produce high...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Isoamylase; Rhizopus oryzae; SSF; Waste utilization.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000500003
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Inibição do crescimento de Rhizopus oryzae pelos óleos essenciais de Piper hispidum, Piper marginatum, Piper tuberculatum e Piper sp.: efeito no biofilme e na atividade peptidásica. Repositório Alice
AZEVEDO, M. M. B. de; ALMEIDA, C. A.; CHAVES, F. C. M.; GAMA, P. E.; CUNHA, A. L. B. da; BATISTA, A. C.; SANTOS, E. da S.; BIZZO, H. R.; ALVIANO, C. S..
Tipo: Separatas Palavras-chave: Inibição de protease; Biofilme; Óleo Essencial; Piper; Rhizopus oryzae.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/968964
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KINETIC STUDY OF PALMITIC ACID ESTERIFICATION CATALYZED BY Rhizopus oryzae RESTING CELLS Acta biol.Colomb.
MÉNDEZ,JONH J; RAMON,CANELA; TORRES,MERCÈ.
In the present study, a kinetic model for the biocatalytic synthesis of esters using Rhizopus oryzae resting cells is proposed. The kinetic study has been made in a range of 30-50 °C and atmospheric pressure. The Influence of operating variables, water content, pH, amount of mycelium was studied. Different values of temperature, initial mycelium concentration and acid/alcohol molar ratio were tested. Initial rates were estimated from the slope of the concentration of palmitic acid, or their corresponding ester at conversions of less than 10%, versus time and reported as mmol l-1 min -1. The values of kinetic constants were computed using the freeware program SIMFIT (http:\\www.simfit.man.ac.uk).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bound lipase; Esterification; Fungal resting cells; Rhizopus oryzae; Palmitic acid; Propanol.
Ano: 2009 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2009000100011
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Kinetics Study of Extracellular Detergent Stable Alkaline Protease from Rhizopus oryzae BABT
Mushtaq,Zareena; Irfan,Muhammad; Nadeem,Muhammad; Naz,Mammona; Syed,Quratulain.
In this study, extracellular alkaline protease was produced from Rhizopus oryzae in submerged fermentation using dairy waste (whey) as a substrate. Fermentation kinetics was studied and various parameters were optimized. The strain produced maximum protease at initial medium pH of 6.0 medium depth of 26 mm, inoculum size of 2% at incubation temperature of 35ºC for 168 h of fermentation. Alkaline protease was purified to homogeneity by ammonium sulphate fractionation followed by sephadex G-100 chromatography. The molecular mass of alkaline protease was 69 kDa determined by 10% SDS-PAGE. The optimum pH and temperature of alkaline protease was 9.0 and 40ºC, respectively. Metal profile of the enzyme showed that the enzyme was non-metallic in nature. The Km ,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Kinetics; Purification; Characterization; Protease; Detergent stability; Rhizopus oryzae.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000200175
Registros recuperados: 7
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