Maira Cristina Martini
Univates
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Publication
Featured researches published by Maira Cristina Martini.
Biocatalysis and Biotransformation | 2017
Mariano Rodrigues; Wagner Manica Carlesso; Daniel Kuhn; Taciélen Altmayer; Maira Cristina Martini; Camila Durlo Tamiosso; Carlos Augusto Mallmann; Claucia Fernanda Volken de Souza; Eduardo Miranda Ethur; Lucélia Hoehne
Abstract Some studies have carried out in order to retrieve proteins from the by-product of animal-processing industries. Earthworms are rich in protein and usually are used in animal feed. Thus, this study aimed to optimize the hydrolysis process of Eisenia andrei earthworms by employing Alcalase enzyme. Using the response surface methodology, we evaluated the following conditions: temperature, hydrolysis time, stirring speed, and enzyme/substrate ratio. The optimal conditions for the experimental design were determined through the analysis of the foaming and emulsifying properties, in vitro starch digestibility, and antioxidant activity. The results demonstrate that the highest degree of hydrolysis (i.e., 92%) was obtained under the following conditions: pH, 9.5; temperature, 25 °C; hydrolysis time, 2.25 h; stirring speed, 200 rpm; and enzyme/substrate ratio, 1.77%, using Alcalase enzyme. Evaluation of the amino acid composition under these conditions revealed higher concentrations of aspartic acid, glutamic acid, and leucine. The in vitro protein digestibility of the hydrolysate was approximately 73%. There were no significant improvements in either foam stability or emulsification after enzymatic hydrolysis. Additional studies on the antioxidant activity are required. This bioproduct could potentially serve as a promising supplementary food product.
Water Air and Soil Pollution | 2016
Lucélia Hoehne; Christina Venzke Simões de Lima; Maira Cristina Martini; Taciélen Altmayer; Débora Tairini Brietzke; Jordana Finatto; Tamara Engelmann Gonçalves; Camille Eichelberger Granada
The contamination of soil with heavy metals is a serious agricultural issue. The presence of foods contaminated with heavy metals in the human diet can cause health damages. Metal phytoextraction processes remove soil contaminants through plant absorption; however, plants display different responses to the metal contamination of the soil. Thus, the purposes of this paper were to determine cadmium (Cd), chromium (Cr), and lead (Pb) immobilization in soil mixed with different amounts of stabilized vermicompost (obtained by earthworm composting) and verify if this vermicompost helps in the removal of heavy metal through the phytoextraction technique with black oat (Avena strigosa Schreb cv IAPAR 61) plants. The addition of a high quantity of vermicompost (50, 75, and 100%) to the soil presents similar results to the immobilization of Cd, Cr, and Pb, and a similar trend was observed in lower quantities (0 and 25%) of vermicompost. The addition of vermicompost improves the growth of black oat plants, but only the treatment with 25% of vermicompost showed promising results in the absorption of Cr and Pb, and the treatment with 50% in the absorption of Cd. Finally, we suggest that “IAPAR 61” black oat cultivar is efficient Cd, Cr, and Pb accumulators. However, heavy metal remained mostly in the root, indicating that root-to-shoot translocation was not efficient, hindering its application for phytoremediation strategies.
Seminário de Iniciação Científica | 2015
Taciélen Tlmayer; Débora Tairini Rietzke; Jordana Finatto; Maira Cristina Martini; Christina Venzke Simões de Lima; Lucélia Hoehne
Seminário de Iniciação Científica | 2015
Jordana Finatto; Débora Tairini Rietzke; Maira Cristina Martini; Taciélen Altmayer; Valeriano Antonio Corbellini; Lucélia Hoehne
Seminário de Iniciação Científica | 2015
Débora Tairini Rietzke; Jordana Finatto; Maira Cristina Martini; Taciélen Altmayer; Lucélia Hoehne
Seminário de Iniciação Científica | 2015
Maira Cristina Martini; Claudimar Sidnei Fior; Débora Tairini Rietzke; Elisete Maria De Freitas; Debora Stevens; Lucélia Hoehne
Revista Jovens Pesquisadores | 2015
Rosecler Ribeiro; Maira Cristina Martini; Wagner Manica Carlesso; Simone Stülp; Eduardo Miranda Ethur; Lucélia Hoehne
Seminário de Iniciação Científica | 2014
Maira Cristina Martini; Elisete Maria de Freitas; Simone Tülp; Taciélen Altmayer; Eduardo Miranda Ethur; Lucélia Hoehne
Seminário de Iniciação Científica | 2014
Rosecler Ribeiro; Maira Cristina Martini; Simone Tülp; Wagner Manica Carlesso; Eduardo Miranda Ethur; Lucélia Hoehne
Seminário de Iniciação Científica | 2013
Rosecler Ribeiro; Maira Cristina Martini; Simone Tülp; Wagner Manica Carlesso; Eduardo Miranda Ethur; Lucélia Hoehne