Consulta: creatorFacets:"Polizeli,Maria de Lourdes Teixeira de Moraes"
Registros recuperados: 6
Data/hora: 06/06/2024 14:09:33

Biochemical traits useful for the determination of genetic variation in a natural population of Myracrodruon urundeuva
Provedor de dados: 86
Autores: Abdala,Ludmila; Moraes,Mario Luiz Teixeira de; Rechia,Carem Gledes Vargas; Giorgini,Jarbas Francisco; Sá,Marco Eustáquio de; Polizeli,Maria de Lourdes Teixeira de Moraes.
The objectives of this work were to analyze seeds from 20 trees of aroeira (Myracrodruon urundeuva Fr. All.) of a natural population located in the region of Selvíria, State of Mato Grosso do Sul, Brazil, in order to evaluate their protein, lipid and carbohydrate contents, and to estimate their genetic variation. A completely randomized experimental design consisting of 20 treatments (families) was set up, with two replications. Four types of proteins were detected: albumin (35.0 to 107.3 mg/g seed), globulin (3.4 to 9.3 mg/g), prolamin (60.0 to 135.2 mg/g) and glutelin (118.0 to 286.0 mg/g). The lipid content varied between 200 and 334 mg/g seed. The total sugars also varied (26.5 to 46.3 mg/g seed), with a predominance of polyols (arabinitol, mannitol,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Myracrodruon urundeuva; Seed; Proteins; Lipids; Carbohydrates; Evaluation.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002000700003

Bioprospection and characterization of the amylolytic activity by filamentous fungi from Brazilian Atlantic Forest
Provedor de dados: 49
Autores: 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

Biotechnological potential of alternative carbon sources for production of pectinases by Rhizopus microsporus var. rhizopodiformis
Provedor de dados: 52
Autores: 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

Screening of thermotolerant and thermophilic fungi aiming β-xylosidase and arabinanase production
Provedor de dados: 58
Autores: Benassi,Vivian Machado; Lucas,Rosymar Coutinho de; Jorge,João Atílio; Polizeli,Maria de Lourdes Teixeira de Moraes.
Plant cell wall is mainly composed by cellulose, hemicellulose and lignin. The heterogeneous structure and composition of the hemicellulose are key impediments to its depolymerization and subsequent use in fermentation processes. Thus, this study aimed to perform a screening of thermophilic and thermotolerant filamentous fungi collected from different regions of the São Paulo state, and analyze the production of β-xylosidase and arabinanase at different temperatures. These enzymes are important to cell wall degradation and synthesis of end products as xylose and arabinose, respectively, which are significant sugars to fermentation and ethanol production. A total of 12 fungal species were analyzed and 9 of them grew at 45 ºC, suggesting a thermophilic or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Screening; Β-D-xylosidase; Arabinanase; Thermotolerant; Thermophilic.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400042

Production of thermostable invertases by Aspergillus caespitosus under submerged or solid state fermentation using agroindustrial residues as carbon source
Provedor de dados: 58
Autores: Alegre,Ana Cláudia Paiva; Polizeli,Maria de Lourdes Teixeira de Moraes; Terenzi,Héctor Francisco; Jorge,João Atílio; Guimarães,Luis Henrique Souza.
The filamentous fungus Aspergillus caespitosus was a good producer of intracellular and extracellular invertases under submerged (SbmF) or solid-state fermentation (SSF), using agroindustrial residues, such as wheat bran, as carbon source. The production of extracellular enzyme under SSF at 30ºC, for 72h, was enhanced using SR salt solution (1:1, w/v) to humidify the substrate. The extracellular activity under SSF using wheat bran was around 5.5-fold higher than that obtained in SbmF (Khanna medium) with the same carbon source. However, the production of enzyme with wheat bran plus oat meal was 2.2-fold higher than wheat bran isolated. The enzymatic production was affected by supplementation with nitrogen and phosphate sources. The addition of glucose in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aspergillus caespitosus; ²-D-fructofuranosidase; Invertase; Solid-state fermentation; Submerged fermentation.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000300025

Cyclodextrin glycosyltransferase from Bacillus licheniformis: optimization of production and its properties
Provedor de dados: 58
Autores: Bonilha,Paulo Roberto Martins; Menocci,Vivian; Goulart,Antonio José; Polizeli,Maria de Lourdes Teixeira de Moraes; Monti,Rubens.
Cyclodextrin glycosyltransferase (EC 2.4.1.19) is an enzyme that produces cyclodextrins from starch via an intramolecular transglycosylation reaction. An alkalophilic Bacillus strain, isolated from cassava peels, was identified as Bacillus licheniformis. CGTase production by this strain was better when potato starch was used as carbon source, followed by cassava starch and amylopectin. Glucose and amylose, on the other hand, acted as synthesis repressors. When the cultivation was supplemented with sodium ions and had the pH adjusted between 6.0 and 9.0, the microorganism maintained the growth and enzyme production capacity. This data is interesting because it contradicts the concept that alkalophilic microorganisms do not grow in this pH range. After...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyclodextrin glycosyltransferase; CGTase production; Bacilluslicheniformis; Bacillus beta-CD.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000300022