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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.1995.tde-20231122-100553
Document
Author
Full name
Luiz Humberto Gomes
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 1995
Supervisor
Title in Portuguese
Avaliação de quatro métodos para a caracterização de leveduras
Keywords in Portuguese
CARACTERIZAÇÃO
LEVEDURAS
Abstract in Portuguese
Este trabalho teve por objetivos comparar a eficiência de quatro métodos na caracterização de linhagens de leveduras industriais, a fim de estabelecer um padrão a ser seguido na caracterização da levedura utilizada no processo fermentativo, e por consequência a verificação de possíveis contaminações que possam ocorrer. As linhagens utilizadas para este trabalho foram IZ1904, M300A-10, FF, ITAIQUARA, M304-2C pertencentes à indústria alcooleira e SC, AN, KA, BR e SK pertencentes à indústria cervejeira. Os métodos utilizados foram meios diferenciais, eletroforese de proteínas totais (SDS-P AGE), separação de cromossomos (CHEF) e RAPD. Todos os métodos mostraram-se eficientes na diferenciação das linhagens da indústria cervejeira, pois se tratam de linhagens pertencentes a espécies diferentes. Já no caso das linhagens da indústria alcooleira, que apresentam uma alta similaridade, sendo todas as cinco pertencentes à mesma espécie (Saccharomyces cerevisiae), houve diferença na sensibilidade dos métodos, mostrando vantagens de uns em relação aos outros.
Title in English
Evaluation of four methods for yeast characterization
Abstract in English
This work had the objective to compare the efficiency of four methods used to identify industrial yeast strains, to establish a pattern for yeast characterization to be used during the process, so permitting detection of contamination that may occur. The yeast strains utilized were IZ1904, M300A-10, FF, ITAIQUARA, M304-2C used by the alcohol industry and SC, AN, KA, BR and SK used in the brewing industry. The methods used were differential culture media, total protein electrophoresis (SDS-PAGE), CHEF chromosome separation, and RAPD. For identification of brewing yeast, all the methods were efficient, since the strains come from different species. For the alcohol strains, that showed high level of similarity, being all the five strains from the same species, there were differences in the method sensibilities, some showing advantages over others.
 
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Publishing Date
2023-11-24
 
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