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Featured researches published by Maira Cristina Martini.


Biocatalysis and Biotransformation | 2017

Enzymatic hydrolysis of the Eisenia andrei earthworm: Characterization and evaluation of its properties

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

Addition of Vermicompost to Heavy Metal-Contaminated Soil Increases the Ability of Black Oat (Avena strigosa Schreb) Plants to Remove Cd, Cr, and Pb

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

AVALIAÇÃO DA BIODISPONIBILIDADE DO CÁDMIO EM SOLO CONTAMINADO APÓS APLICAÇÃO DE HÚMUS DE MINHOCA

Taciélen Tlmayer; Débora Tairini Rietzke; Jordana Finatto; Maira Cristina Martini; Christina Venzke Simões de Lima; Lucélia Hoehne


Seminário de Iniciação Científica | 2015

ESTUDO DAS DIFERENTES TEMPERATURAS E TEMPOS PARA EXTRAÇÃO DO LÍQUIDO CELOMÁTICO DE MINHOCA

Jordana Finatto; Débora Tairini Rietzke; Maira Cristina Martini; Taciélen Altmayer; Valeriano Antonio Corbellini; Lucélia Hoehne


Seminário de Iniciação Científica | 2015

ANÁLISE DE ACÚMULO DE METAL CÁDMIO EM MINHOCAS APÓS VERMICOMPOSTAGEM

Débora Tairini Rietzke; Jordana Finatto; Maira Cristina Martini; Taciélen Altmayer; Lucélia Hoehne


Seminário de Iniciação Científica | 2015

PROCESSO DE VERMICOMPOSTAGEM EM LODO DE CURTUME CONTENDO CROMO E APÓS APLICAÇÃO COMO BIOFERTILIZANTE EM CULTIVO DE CEBOLINHA (ALLIUM SCHOENOPRASUM).

Maira Cristina Martini; Claudimar Sidnei Fior; Débora Tairini Rietzke; Elisete Maria De Freitas; Debora Stevens; Lucélia Hoehne


Revista Jovens Pesquisadores | 2015

AVALIAÇÃO DO FATOR DE BIOACUMULAÇÃO DE CÁDMIO EM MINHOCAS NO PROCESSO DE VERMICOMPOSTAGEM

Rosecler Ribeiro; Maira Cristina Martini; Wagner Manica Carlesso; Simone Stülp; Eduardo Miranda Ethur; Lucélia Hoehne


Seminário de Iniciação Científica | 2014

CARACTERIZAÇÃO DAS PLANTAS E PRODUÇÃO DO PIMENTÃO (CAPSICUM ANNUUM L) CULTIVADO COM HÚMUS DE MINHOCA CONTENDO CÁDMIO

Maira Cristina Martini; Elisete Maria de Freitas; Simone Tülp; Taciélen Altmayer; Eduardo Miranda Ethur; Lucélia Hoehne


Seminário de Iniciação Científica | 2014

AVALIAÇÃO DO FATOR DE BIOACUMULAÇÃO DE CD EM MINHOCAS NO PROCESSO DE VERMICOMPOSTAGEM

Rosecler Ribeiro; Maira Cristina Martini; Simone Tülp; Wagner Manica Carlesso; Eduardo Miranda Ethur; Lucélia Hoehne


Seminário de Iniciação Científica | 2013

CARACTERIZAÇÃO DO SOLO CONTAMINADO COM ZINCO APÓS O PROCESSO DE VERMICOMPOSTAGEM

Rosecler Ribeiro; Maira Cristina Martini; Simone Tülp; Wagner Manica Carlesso; Eduardo Miranda Ethur; Lucélia Hoehne

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