R
Roselei Claudete Fontana
Researcher at University of Caxias do Sul
Publications - 66
Citations - 1390
Roselei Claudete Fontana is an academic researcher from University of Caxias do Sul. The author has contributed to research in topics: Enzymatic hydrolysis & Fermentation. The author has an hindex of 20, co-authored 56 publications receiving 1065 citations.
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Journal ArticleDOI
Clarification of fruit juices by fungal pectinases
Ivana Greice Sandri,Roselei Claudete Fontana,Débora Menim Barfknecht,Mauricio Moura da Silveira +3 more
TL;DR: Analysis of the efficiency of fungal pectinolytic preparations produced in laboratory and commercial products used in the clarification process of apple, butia palm fruit, blueberry, and grape juices reveals the potential of A. niger T0005007-2 enzymes for commercial application.
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Aqueous extracts of Lentinula edodes and Pleurotus sajor-caju exhibit high antioxidant capability and promising in vitro antitumor activity.
Tiane C. Finimundy,Gabriela Gambato,Roselei Claudete Fontana,Marli Camassola,Mirian Salvador,Sidnei Moura,Jochen Hess,Jochen Hess,João Antonio Pêgas Henriques,Aldo José Pinheiro Dillon,Mariana Roesch-Ely +10 more
TL;DR: Results indicate that the aqueous extracts of Brazilian L edodes and P sajor-caju mushrooms are potential sources of antioxidant and anticancer compounds, however, further investigations are needed to exploit their valuable therapeutic uses and to elucidate their modes of action.
Journal ArticleDOI
Use of pectinases produced by a new strain of Aspergillus niger for the enzymatic treatment of apple and blueberry juice
Ivana Greice Sandri,Cristiane Menegoto Toscan Lorenzoni,Roselei Claudete Fontana,Mauricio Moura da Silveira +3 more
TL;DR: In this article, pectinases-producing filamentous fungi were isolated with the aim of using their enzymes in the clarification of apple and blueberry juices, and the experimental extract enzyme EE obtained in solid-state process with a strain identified as belonging to the species Aspergillus niger and designated LB23 was used for treating juices and compared with two commercial enzyme preparations.
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Increased release of fermentable sugars from elephant grass by enzymatic hydrolysis in the presence of surfactants
Daiane Menegol,Angélica Luisi Scholl,Roselei Claudete Fontana,Aldo José Pinheiro Dillon,Marli Camassola +4 more
TL;DR: In this article, the effects of Tween and Triton surfactants on the enzymatic hydrolysis of elephant grass were evaluated in this context, and it was shown that pretreatment with sodium hydroxide, along with a smaller particle size (0.075-0.152mm) increased the efficiency of releasing reducing sugars from pretreated elephant grass biomass.
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Comparison of stirred tank and airlift bioreactors in the production of polygalacturonases by Aspergillus oryzae.
TL;DR: The airlift bioreactor showed satisfactory results regarding the oxygen transfer rate in this process, indicating its potential to be used in an eventual larger scale production of exo- and endo-PG, with lower costs for both installation and operation.