Alessandra Buss Tessaro
Universidade Federal de Pelotas
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Featured researches published by Alessandra Buss Tessaro.
Ambiente Construído | 2012
Alessandra Buss Tessaro; Jocelito Saccol de Sá; Lucas Bastianello Scremin
A construcao civil e um dos setores economicos de maior impacto no meio ambiente. Entre os impactos causados por essa atividade, pode-se citar o elevado volume de residuos gerados, que, na maioria dos municipios brasileiros, sao depositados irregularmente, intensificando os problemas de saneamento nas areas urbanas. Em virtude disso, algumas acoes vem sendo tomadas pelo Governo Federal, entre as quais se pode citar a criacao de uma resolucao que estabelece a elaboracao e implantacao de um plano integrado de gerenciamento de residuos da construcao civil com base nas caracteristicas de cada regiao. O objetivo do presente artigo e apresentar os resultados do diagnostico qualitativo e quantitativo da producao de residuos de construcao e demolicao (RCD) no municipio de Pelotas-RS, elaborado com o auxilio de um software. O diagnostico final resultante da pesquisa foi que sao produzidos diariamente no referido municipio 315,08 m³ de RCD a uma taxa de geracao per capita de 1,23 kg/hab.ano. A densidade dos RCD encontrada foi de 1,28 ton/m³, e a composicao gravimetrica mostrou que 88% dos RCD produzidos referem-se aos residuos classe A, os quais tem grande potencial para reutilizacao e reciclagem.
African Journal of Agricultural Research | 2015
Sideney Becker Onofre; Dirceu Abatti; Douglas Refosco; Amarildo Antonio Tessaro; Jean Alisson Becker Onofre; Alessandra Buss Tessaro
1 Center of Exact and Environmental Sciences Postgraduate Program in Technology and Innovation Management PPGTI Regional Community University of Chapecó UNOCHAPECÓ Av. Senador Attílio Fontana, 591-E EFAPI 89809-000 Chapecó Santa Catarina Brazil. 2 Paraná Southwest Education Union UNISEP Course in Environmental Engineering Av. Presidente Kennedy, 2601 Dois Vizinhos Paraná Brazil. 3 Postgraduate Program in Materials Science and Engineering Federal University of Pelotas – UFPel -Rua Flores da Cunha, 809 – Pelotas – Rio Grande do Sul – Brazil.
International Journal of Advanced Engineering Research and Science | 2017
Sideney Becker Onofre; Ivan Carlos Bertoldo; Dirceu Abatti; Douglas Refosco; Amarildo Antonio Tessaro; Alessandra Buss Tessaro
Polygalacturonases belong to the family of pectinases, enzymes that are in high demand in industry because of their many different applications. This study therefore sought to examine the production of polygalacturonases using an endophytic fungus, Penicilium brevicompactum, isolated from Baccharis dracunculifolia D.C. (Asteraceae) through semi solid fermentation using orange peels and citric pectin 2% as base substrate, supplemented with different carbon sources. After the fermentation process, the enzyme was characterized. The results showed that the micro-organism was able to use a wide range of carbon sources, but with polygalacturonase activity varying with each source. The highest yield, however, was achieved after 30 hours of incubation in the presence of 4% of galactose and 2% of pectin. Studies on the characterization of the polygalacturonase revealed that the optimal temperature of this enzyme is 72°C and that it maintains 60 and 15% of its maximum activity when incubated for 2 hours at 40 and 90°C, respectively. The optimal pH for the activity of the enzyme was 4.6. The enzyme retained 65 and 30% of its maximum activity when incubated at pH 3.5 and 9.5, respectively, for 24 hours at ambient temperature. The enzyme activity was stimulated by Mg2+ ions. On the other hand, it was inhibited by the ions Cs+2, Hg+2, Li+2 and Sr+2. The ions Zn+2 and Cu+2 inhibited it by 94% and 69%, respectively.
Ciência e Natura | 2016
Sideney Becker Onofre; Dirceu Abatti; Amarildo Antonio Tessaro; Alessandra Buss Tessaro
In recent years, a substantial amount of evidence has pointed to the key role of free radicals and other oxidants as the main culprits for aging and degenerative diseases associated with aging, such as cancer, cardiovascular diseases, cataract, decline of the immune system and brain dysfunctions. The objective of this work was therefore to detect variations in total phenol and flavonoid content, and in antioxidant activity of samples of V. montevidensis. Dried samples were submitted to extraction to obtain the hexane, ethyl acetate and ethanol fractions. Phytochemical prospecting and an analysis of the phenolic content and antioxidant activity was carried out. The data was analyzed according to the mean±standard deviation and submitted to analysis of variance followed by Tukeys test with a significance of (p < 0.05). Flavonoids, tannins, coumarins, terpenoids, steroids, alkaloids and anthraquinones were detected in the samples. The content of total flavonoids varied between 3.18±0,58 and 7.22±0,17 g/100g, while the total phenols ranged from 1.13±0.16 to 18.44±0.21 g/100g. The extracts produced EC 50 between 339.75±6.56 and 278.33±23.11 μg/mL.
Ambiente Construído | 2015
Alessandra Buss Tessaro; Margarete Regina Freitas Gonçalves; Darci Alberto Gatto; Edilson Nunes Pollnow; Neftalí L. V. Carreño; Rafael de Avila Delucis
African Journal of Biotechnology | 2016
Sideney Becker Onofre; Dirceu Abatti; Douglas Refosco; Amarildo Antonio Tessaro; Jean Alisson Becker Onofre; Alessandra Buss Tessaro
Revista em Agronegócio e Meio Ambiente | 2015
Alessandra Buss Tessaro; Amarildo Antonio Tessaro; Mauricio Pereira Cantão; Maria Alessandra Mendes
African Journal of Agricultural Research | 2015
Sideney Becker Onofre; Dirceu Abatti; Douglas Refosco; Amarildo Antonio Tessaro; Jean Alisson Becker Onofre; Alessandra Buss Tessaro
Revista Técnico Científica | 2014
Amarildo Antonio Tessaro; Adenilson Bianchini; Alessandra Buss Tessaro
Revista Brasileira de Educação Ambiental (RevBEA) | 2014
Henrique Amaral Marcotto; Amarildo Antonio Tessaro; Alessandra Buss Tessaro