• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
https://doi.org/10.11606/D.11.1997.tde-20220207-211021
Document
Author
Full name
Lúcia Cristina Costa Novaes
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 1997
Supervisor
Title in Portuguese
Avaliação da qualidade dos néctares comum e dietético de morango das variedades Guarani e Oso Grande
Keywords in Portuguese
ALIMENTOS DIETÉTICOS
NÉCTAR DE MORANGO
QUALIDADE
VARIEDADES VEGETAIS
Abstract in Portuguese
Foram determinadas as características físico-químicas dos morangos das variedades Guarani e Oso Grande e com estes, elaborados néctares nas formas comum e dietética. Os néctares foram submetidos a diferentes tratamentos químicos (adição de sorbato de potássio, cloreto de estanho, ácido cítrico e ácido ascórbico), visando avaliar a qualidade destas variedades de morango para este tipo de processamento. A qualidade da matéria-prima foi avaliada fisicamente em relação à textura, suculência e rendimento, e quimicamente em termos de pH, sólidos solúveis totais, acidez total titulável e ácido ascórbico. As amostras dos néctares foram submetidas às análises físicas de vácuo, peso bruto e peso líquido; análises químicas quanto aos teores de ácido ascórbico, acidez total titulável, pH e sólidos solúveis totais, e avaliadas sensorialmente quanto à cor, consistência e sabor. Os resultados mostraram que a adição de ácido cítrico foi eficaz na preservação da coloração vermelha do néctar comum das duas variedades, bem como na cor, consistência e sabor do néctar dietético da variedade Oso Grande, sendo considerado o melhor tratamento. A variedade Guarani apresentou características mais apropriadas para a obtenção dos néctares comum e dietético, sendo superior à variedade Oso Grande quanto à cor, consistência e sabor.
Title in English
Quality evaluation of regular and low sugar strawberry nectars made from Guarani and Oso Grande varieties
Abstract in English
Physical and chemical characteristics were determined in Guarani and Oso Grande strawberry varieties. Regular and low sugar strawberry nectars were made from those varieties and submitted to different chemical treatments (addition of potassium sorbate, stannic chloride, citric acid and ascorbic acid), in order to evaluate both strawberry varietiesquality for nectars processing. Quality of raw material was evaluated regarding to texture, succulency, yield, pH, soluble solids, titratable acidity and ascorbic acid. Nectarssamples were submitted to physical determinations for vacuum, gross weight and net weight; chemical analysis for ascorbic acid, titratable acidity, pH, and soluble solids, and organoleptic evaluation for color, consistency and flavour. The results showed the efficiency of citric acid on keeping red color in regular nectar of both varieties, as well as color, consistency and flavour in low sugar nectar of Oso Grande variety, showing the additon of this component as the best treatment. Guarani was the most suitable variety for regular and low sugar nectars processing, being superior to Oso Grande, mainly regarding to color, consistency and flavour.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2022-02-07
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2024. All rights reserved.