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| Author(s): |
André Eduardo de Souza Belluco
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Piracicaba. |
| Institution: | Universidade de São Paulo (USP). Centro de Energia Nuclear na Agricultura (CENA/STB) |
| Defense date: | 2008-05-14 |
| Examining board members: |
Julio Marcos Melges Walder;
André Ricardo Alcarde;
Antonio Sampaio Baptista;
Clovis Parazzi;
Octavio Antonio Valsechi
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| Advisor: | Julio Marcos Melges Walder |
| Abstract | |
The objective of this work was to accumulate the micro-nutrients iron and zinc in yeast Saccharomyces cerevisiae in broth with 300 mg L-1 of iron or zinc. The enriched live yeasts were studied to be added to a substrate (corn) sterilized by gamma radiation in order to be a potential source of pro-biotic. The yeast accumulated iron and zinc during the fermentative cycles, reaching 8,883 mg kg-1 (dry weight) and 7,452 mg kg-1 (dry weight), respectively, at the end of the sixth cycle. The cellular viability of the yeasts added to corn decreased during the period of investigation, presenting the value of 82,53% at 110 days (AU) | |