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      Influência da incorporação de polidextrose como substituto de gordura na qualidade de pão de queijo Translated title: Effect of replacing fat with polydextrose on quality of cheese bread

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          Abstract

          Resumo Um dos grandes desafios do desenvolvimento de produtos com baixos teores de gordura é manter suas características sensoriais. A polidextrose pode ser utilizada como um substituto de gordura, sem causar grandes alterações no produto final. O objetivo deste estudo foi avaliar as características físico-químicas, propriedades nutricionais e investigar o potencial de aceitação de pães de queijo formulados com polidextrose. Foram elaboradas 4 formulações: formulação 1 (sem substituição de óleo por polidextrose); formulações 2, 3 e 4 (contendo diferentes concentrações de substituição de óleo e polidextrose). Participaram da avaliação sensorial 100 provadores não treinados, de 18 a 62 anos. Nas análises físico-químicas foram determinados os teores de água, cinzas, proteínas, lipídeos, textura, volume específico e cor, sendo realizado cálculo teórico para quantificação de carboidratos (por diferença) e fibras. Os resultados demonstraram que nos atributos avaliados as formulações obtiveram aceitabilidade superior a 70%, exceto o atributo intenção de compra da formulação padrão. Foi observado que o desenvolvimento de formulações contendo 4% de polidextrose apresentaram textura semelhante à formulação padrão. Assim, a adição de polidextrose em pães de queijo permitiu a obtenção de produtos com menores teores de lipídeos, maior teor de fibras, boa aceitação sensorial e características tecnológicas semelhantes ao padrão, indicando seu potencial de comercialização.

          Translated abstract

          Abstract One of the great challenges of developing low-fat products is to maintain their sensory characteristics. Polydextrose can be used as a fat substitute without causing major changes in the final product. The objective of this study was to evaluate the physicochemical characteristics, nutritional properties and acceptance of cheese breads made with polydextrose. Four formulations were elaborated: formulation 1 (without substitution of oil for polydextrose); formulations 2, 3 and 4 (containing different concentrations of oil substitution and polydextrose). A total of 100 untrained testers aged 18-62 participated in the sensory evaluation. In the physicochemical analyzes the water moisture, ash, protein, fat, texture, specific volume and color contents were determined. Theoretical calculations were performed for the quantification of carbohydrates (by difference) and fibers. The results showed that for the attributes evaluated, acceptance of the formulations was higher than 70%, except for intention to purchase of the standard formulation. It was observed that the development of formulations included 4% polydextrose, with texture similar to the standard pattern. Thus, an addition of polydextrose in cheese breads, allows the prodution of products with lower lipid content, higher fiber content, good sensory acceptance and specific technological characteristics for the standard, which shows its commercialization potential.

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          Dietary modulation of the human colonic microbiota: updating the concept of prebiotics.

          Prebiotics are non-digestible (by the host) food ingredients that have a beneficial effect through their selective metabolism in the intestinal tract. Key to this is the specificity of microbial changes. The present paper reviews the concept in terms of three criteria: (a) resistance to gastric acidity, hydrolysis by mammalian enzymes and gastrointestinal absorption; (b) fermentation by intestinal microflora; (c) selective stimulation of the growth and/or activity of intestinal bacteria associated with health and wellbeing. The conclusion is that prebiotics that currently fulfil these three criteria are fructo-oligosaccharides, galacto-oligosaccharides and lactulose, although promise does exist with several other dietary carbohydrates. Given the range of food vehicles that may be fortified by prebiotics, their ability to confer positive microflora changes and the health aspects that may accrue, it is important that robust technologies to assay functionality are used. This would include a molecular-based approach to determine flora changes. The future use of prebiotics may allow species-level changes in the microbiota, an extrapolation into genera other than the bifidobacteria and lactobacilli, and allow preferential use in disease-prone areas of the body.
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            DESIGNS TO BALANCE THE EFFECT OF ORDER OF PRESENTATION AND FIRST-ORDER CARRY-OVER EFFECTS IN HALL TESTS

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              Correlation of lycopene measured by HPLC with the L, a, b color readings of a hydroponic tomato and the relationship of maturity with color and lycopene content.

              Tomatoes (Lycopersicon esculentum cv. Laura) were separated, according to the ripening stage, by a sensory panel into seven groups, and color was measured on the tomato surface with a Minolta Chroma meter. The L, a, b, hue, chroma, and lycopene content were plotted against the maturity stages of the tomatoes, and several good correlations were found. The a/b ratio and the lycopene content were the parameters that allowed six of seven maturity groups in the tomato to be statistically distinguished. The lycopene content, measured by HPLC, was also correlated with the color measurements, and the a, a/b, and (a/b)(2) color factors produced the best regressions. An estimation of the lycopene content in tomatoes can be achieved by using a portable chroma meter, with a possible field usage application. Equations to calculate the lycopene content of tomatoes based on the color readings are reported.
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                Author and article information

                Journal
                bjft
                Brazilian Journal of Food Technology
                Braz. J. Food Technol.
                Instituto de Tecnologia de Alimentos - ITAL (Campinas, SP, Brazil )
                1981-6723
                2020
                : 23
                : e2019107
                Affiliations
                [01] Campo Grande Mato Grosso do Sul orgnameUniversidade Federal de Mato Grosso do Sul orgdiv1Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição Brazil
                [02] Campinas SP orgnameInstituto de Tecnologia de Alimentos, Cereal Chocotec Brasil
                Article
                S1981-67232020000100476 S1981-6723(20)02300000476
                10.1590/1981-6723.10719
                fb9f7055-f70a-4c7c-9086-8cfaf32ae676

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 20 April 2019
                : 21 July 2020
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 49, Pages: 0
                Product

                SciELO Brazil

                Categories
                Artigos Científicos

                Alimento funcional,Fibra alimentar,Sensory analysis,Prebiótico,Prebiotic,Lipídeos,Nutrition,Fats,Dietary fiber,Análise sensorial,Functional food,Nutrição

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