Desenvolvimento de bebida láctea probiótica carbonatada: características físico-químicas, microbiológicas e sensoriais
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Data
2012-03-16
Autores
Jardim, Fernanda Barbosa Borges [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O objetivo deste trabalho foi desenvolver uma bebida láctea sabor morango carbonatada e fermentada com bactérias probióticas. Foram elaboradas quatro formulações de bebida láctea: Controle (BL); Fermentada (BLF); Carbonatada (BLC) e Fermentada Carbonatada (BLFC). Nas amostras submetidas à carbonatação, utilizou-se um carbonatador para injeção do gás dióxido de carbono (CO2) dissolvido em água potável, resultando em um produto com a proporção de 2: 1 (volume de gás/ volume de bebida láctea) e nas amostras fermentadas, adotou-se o cultivo constituído das bactérias lácticas Lactobacillus acidophilus-LA-5®, Bifidobacterium BB-12® e Streptococcus thermophilus. As amostras foram caracterizadas quanto a parâmetros físico-químicos (composição química, índice de proteólise e teor de carbonatação), parâmetros microbiológicos (contagens de coliformes totais, E. coli, bolores e leveduras e viabilidade das bactérias lácticas) e aspectos sensoriais através de testes de aceitação e intenção de compra, ao longo de 28 dias de armazenamento refrigerado das bebidas lácteas. As formulações de bebidas fermentadas BLF e BLFC apresentaram diferenças significativas (p < 0,05) em relação às amostras não fermentadas BL e BLC nos parâmetros glicídeos redutores em lactose e em sacarose, pH e índice de proteólise, com menores médias absolutas e acidez com maiores médias em todos os tempos estudados. As bebidas fermentadas BLF e BLFC não apresentaram presença de microrganismos contaminantes. A amostra BLC apresentou presença de leveduras e coliformes totais, mas as contagens indicaram que estava própria para o consumo no tempo 28 dias. Entretanto, a amostra controle (BL) apresentou contagens...
The goal of this work was to develop a strawberry flavored dairy beverages carbonated and fermented with probiotic bacteria. Four formulas of dairy beverages were elaborated: Control (BL); Fermented (BLF); Carbonated (BLC) and Carbonated Fermented (BLFC). In samples submitted for carbonation, a carbonator was used for the carbon dioxide (CO2) gas injection dissolved in drinking water, resulting in a product with a ratio of 2:1 (volume of gas volume of dairy beverages) and the cultivation consisting of lactic bacteria Lactobacillus acidophilus-LA-5®, Bifidobacterium BB-12® and Streptococcus thermophilus was employed on the fermented samples. The samples were characterized by physical and chemical parameters (chemical composition, proteolysis index and carbonation proportion), microbiological parameters (total coliform counts, E. coli, yeasts and molds and viability of the lactic bacteria) and sensory aspects through acceptance testing and purchase intention, over the course of 28 days of refrigerated storage of the dairy beverages. The formulations of the BLF and BLFC fermented drink presented significant differences (p < 0,05) in relation to the non-fermented samples BL and BLC in glucides reducer of lactose and sucrose parameters, pH and proteolysis index, with lower absolute averages and acidity with higher averages at all studied times. The fermented beverages BLF and BLFC did not show any presence of contaminating microorganisms. The BLC sample showed the presence of yeasts and coliform counts, but the counts indicated that it was suitable for consumption in 28 days time. However, the sample... (Complete abstract click electronic access below)
The goal of this work was to develop a strawberry flavored dairy beverages carbonated and fermented with probiotic bacteria. Four formulas of dairy beverages were elaborated: Control (BL); Fermented (BLF); Carbonated (BLC) and Carbonated Fermented (BLFC). In samples submitted for carbonation, a carbonator was used for the carbon dioxide (CO2) gas injection dissolved in drinking water, resulting in a product with a ratio of 2:1 (volume of gas volume of dairy beverages) and the cultivation consisting of lactic bacteria Lactobacillus acidophilus-LA-5®, Bifidobacterium BB-12® and Streptococcus thermophilus was employed on the fermented samples. The samples were characterized by physical and chemical parameters (chemical composition, proteolysis index and carbonation proportion), microbiological parameters (total coliform counts, E. coli, yeasts and molds and viability of the lactic bacteria) and sensory aspects through acceptance testing and purchase intention, over the course of 28 days of refrigerated storage of the dairy beverages. The formulations of the BLF and BLFC fermented drink presented significant differences (p < 0,05) in relation to the non-fermented samples BL and BLC in glucides reducer of lactose and sucrose parameters, pH and proteolysis index, with lower absolute averages and acidity with higher averages at all studied times. The fermented beverages BLF and BLFC did not show any presence of contaminating microorganisms. The BLC sample showed the presence of yeasts and coliform counts, but the counts indicated that it was suitable for consumption in 28 days time. However, the sample... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Bebidas fermentadas, Lactobacillus acidophilus, Streptococcus thermophilus, Escherichia coli, Fermentação, Probióticos, Fermented beverage
Como citar
JARDIM, Fernanda Barbosa Borges. Desenvolvimento de bebida láctea probiótica carbonatada: características físico-químicas, microbiológicas e sensoriais. 2012. 128 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Farmacêuticas, 2012.