UTL Repository >
ISA - Instituto Superior de Agronomia >
BISA - Biblioteca do Instituto Superior de Agronomia / Library >
BISA - Dissertações de Mestrado / Master Thesis >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.5/1093

Título: Utilização de leveduras na produção de novas bebidas fermentadas
Outros títulos: Development of new fermented beverages with yeast
Autor: Oliveira, Pedro Miguel Rodrigues
Orientador: Prista, Paula Geoffroy
Dias, Maria da Conceição Loureiro
Palavras-chave: tea
alcoholic fermentation
fermentação alcoólica
Issue Date: 2009
Resumo: The thesis main objective was to produce new and stable fermented sparkling beverages from fruit and infusions/teas, with yeast directed for gourmet restaurants. Ten fruits and eighteen infusions/teas were evaluated for organoleptic properties to choose the best potentially four sparkling beverages. Beverages were characterized for physico-chemical composition, pH, total acidity, ºbrix, soluble protein and phenolic compounds. Antimutagenic potential was analyzed by Ames test. Product shelf-life was established (15 days – juices; 30 days - infusions, at 4ºC) and microbiology analyses were done during the same period, while pH, ºbrix, total acidity, glucose, ethanol and pressure were monitored. RAPD-PCR allowed the microorganism’s strains identification in beverages. Esters, aldehydes, superior alcohols and phenolic compounds were detected by gas chromatography. Three focus group (32 people; ≥ 18 years old) were organized to evaluate beverage’s acceptability. It was concluded that these beverages were stable from the chemical and microbiological point of view. Its global sensorial appreciation was above the average for all four beverages (> 60% - infusions; > 80% - juices).
Descrição: Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/1093
Appears in Collections:BISA - Dissertações de Mestrado / Master Thesis

Files in This Item:

File Description SizeFormat
TESE FINAL 2009.pdf3,07 MBAdobe PDFView/Open
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Promotores do RCAAP   Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência PO Sociedade do Conhecimento (POSC) Portal oficial da União Europeia