Browsing by Author "Souza, Vanessa Rios de"

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    Analysis of the subtropical blackberry cultivar potential in jelly processing.
    (2014) Souza, Vanessa Rios de; Pereira, Patrícia Aparecida Pimenta; Pinheiro, Ana Carla Marques; Lima, Luiz Carlos de Oliveira; Pio, Rafael; Queiroz, Fabiana
    In Brazil, there are numerous blackberry cultivars under cultivation, however, only a few cultivars, such as the Guarani, are displayed/used for processing. In this context the aim of this work was to study the effects of different Brazilian blackberry cultivars (Guarani, Brazos, Comanche, Tupy, Cherokee, Caingangue, and Choctaw) on the physicochemical characteristics, texture profiles and the consumer acceptance of the resulting jelly to identify the potential use of these cultivars in the jelly industry. It is feasible to produce blackberry jellies with the Tupy, Comanche, Brazos, Guarani, and Choctaw cultivars because these jellies demonstrated good acceptability combined with good productivity. Consumers were shown to have a preference for a less adhesive, more acidic jelly. This study provides a useful insight about the Brazilian blackberry cultivar potential in jelly processing.
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    Analysis of various sweeteners in low-sugar mixed fruit jam : equivalent sweetness, time-intensity analysis and acceptance test.
    (2013) Souza, Vanessa Rios de; Pereira, Patrícia Aparecida Pimenta; Pinheiro, Ana Carla Marques; Bolini, Helena Maria André; Borges, Soraia Vilela; Queiroz, Fabiana
    For a sweetener to successfully replace sucrose in food formulations, studies must first be conducted to determine the concentrations of the sweeteners to be used and their equivalent sweetness compared with sucrose. After establishing the optimal concentration of each sweetener, it is necessary to determine which is more similar to sucrose. The objective of this study was to determine the equivalent amount of different sweeteners, necessary to promote the same degree of ideal sweetness in mixed fruit (marolo, sweet passion fruit and soursop) jam and to characterise the time–intensity profile and consumer acceptance. With respect to the mixed fruit jam containing 40% (w/w) of sucrose, sucralose presented the highest sweetening power, being 1033.59 times sweeter than sucrose, followed by sucralose/acesulfame-K/neotame 5:3:0.1 (982.80), sucralose/steviol glycoside 2:1 (862.67), sucralose/acesulfame-K 3:1 (847.45) and sucralose/thaumatin 1:0.6 (284.29). The sweeteners had a time–intensity sweetness profile similar to sucrose and a time– intensity bitterness profile different from sucrose but similar among themselves. In relation to sensory acceptance, a significant difference between the low-sugar jam and the traditional jam was not observed.
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    Determination of the bioactive compounds, antioxidant activity and chemical composition of Brazilian blackberry, red raspberry, strawberry, blueberry and sweet cherry fruits.
    (2014) Souza, Vanessa Rios de; Pereira, Patrícia Aparecida Pimenta; Silva, Thais Lomônaco Teodoro da; Lima, Luiz Carlos de Oliveira; Pio, Rafael; Queiroz, Fabiana
    This study aimed to evaluate the chemical composition, identify the bioactive compounds and measure the antioxidant activity present in blackberry, red raspberry, strawberry, sweet cherry and blueberry fruits produced in the subtropical areas of Brazil and to verify that the chemical properties of these fruit are similar when compared to the temperate production zones. Compared with berries and cherries grown in temperate climates, the centesimal composition and physical chemical characteristics found in the Brazilian berries and cherries are in agreement with data from the literature. For the mineral composition, the analyzed fruits presented lower concentrations of P, K, Ca, Mg and Zn and higher levels of Fe. The values found for the bioactive compounds generally fit the ranges reported in the literature with minor differences. The greatest difference was found in relation to ascorbic acid, as all fruits analyzed showed levels well above those found in the literature.
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    Evaluation of the jelly processing potential of raspberries adapted in Brazil.
    (2014) Souza, Vanessa Rios de; Pereira, Patrícia Aparecida Pimenta; Pinheiro, Ana Carla Marques; Nunes, Cleiton Antônio; Pio, Rafael; Queiroz, Fabiana
    Generally raspberry products as jams, jellies, and preserves are made with red raspberry, however, yellow raspberry and especially black raspberry are also fruits adapted in Brazil, presenting even better productivity and quality. Thus, the aim of this study was to evaluate the processing potential of other varieties of raspberry, but the red, in the preparation of jellies through mixture design and response surface methodology (RSM). These techniques were used to optimize the following 3 variables: yellow (Golden Bliss cultivar, Rubus idaeus), black (Rubus niveus), and red raspberries (Batum cultivar, Rubus idaeus) to formulate a mixed raspberry fruit jelly through sensory evaluations. It was found that jelly formulated with a mix of colored raspberries grown in subtropical regions is a viable and alternative way to use yellow and black raspberries. The mixed raspberry jelly must have 0% to 30% yellow raspberries, 25% to 50% black raspberries, and 30% to 75% red raspberries. Within this region, the optimum formulation has ideal characteristics that are often not observed in formulations with 100% black or yellow raspberries.
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    Influence of gelling agent concentration on the characteristics of functional sugar-free guava preserves.
    (2019) Pereira, Patrícia Aparecida Pimenta; Souza, Vanessa Rios de; Silva, Andressa Alvarenga; Queiroz, Fabiana; Borges, Soraia Vilela; Pinheiro, Ana Carla Marques; Carneiro, João de Deus Souza
    Response surface methodology was used to determine the influence of gelling agents and their concentrations on the sensory characteristics and texture of functional sugar-free guava preserves. The gelling agents used were locust bean gum (0.16% to 1.84%), carrageenan (0.16% to 1.84%) and low methoxyl pectin (1.16% to 2.84%). The effects on the sensory and texture characteristics were studied using a central composite design. The results showed that the carrageenan and locust bean gums strongly influenced the texture and sensory characteristics of the functional sugar-free guava preserves. It is recommended that low methoxyl pectin at a concentration of 2.0% can be used together with carrageenan and locust bean gums. The results suggest that for the best scores of the sensory attributes, locust bean gum and carrageenan concentrations ranging from 0.16% to 0.41% must be used. Higher instrumental values of the texture characteristics were achieved with higher concentrations of these two gums.
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    Influence of processing on the antioxidant capacity and bioactive compounds in jellies from different blackberry cultivars.
    (2015) Souza, Vanessa Rios de; Pereira, Patrícia Aparecida Pimenta; Teixeira, Taísa Rezende; Silva, Thais Lomônaco Teodoro da; Pio, Rafael; Queiroz, Fabiana
    The effect of thermal processing and the berry cultivar has been the subject of several studies, to serve as a basis for the least possible loss of bioactive compounds and antioxidant capacity. In Brazil, there are numerous blackberry cultivars under cultivation, and in this context, the aim of this work was to study how the bioactive compound contents and antioxidant capacity of blackberry jelly were influenced by the cultivars (Guarani, Brazos, Comanche, Tupy, Cherokee, Caingangue and Choctaw). Analysis was made of 7 fresh blackberry cultivars and 7 blackberry jelly formulations. Analysis of antioxidant activity, total phenolics, total anthocyanins and ascorbic acid was performed. It was verified that the contribution of the heat sensitive antioxidants compounds is considerable in all blackberry cultivars, and the degradation of these compounds was significantly different between the different blackberry cultivars. The Brazos and Caingangue cultivars stand out as undergoing the lowest losses in processing, resulting in jellies richer in bioactive compounds and higher antioxidant capacity.
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    Influence of storage time and packaging on the sensory profile of functional diet guava preserve.
    (2017) Mesquita, Karina Scatolino; Souza, Vanessa Rios de; Rodrigues, Jéssica Ferreira; Menezes, Camila Carvalho de; Borges, Soraia Vilela; Carneiro, João de Deus Souza; Pinheiro, Ana Carla Marques
    Purpose – People are increasingly concerned about food and health and seek for functional and sugar-free products. However, there are technological challenges when adding functional components and substituting sugar in foods. Thus, the purpose of this paper is to evaluate the influence of packaging and storage time on the sensory profile of functional diet guava preserve added with prebiotics, supporting the development of functional and sugar-free products and contributing to the product variety in the market. Design/methodology/approach – A two-factor full factorial design was conducted in triplications that evaluated transparent and opaque packaging vs storage time (six months). The products were stored in packages with different light permeability (transparent and opaque). Quantitative descriptive analysis (QDA) and acceptance tests were performed. Findings – The packaging material did not affect the sensory changes of functional diet guava preserve during the six months of storage. QDA test showed that from three months of storage the original characteristics of the product were lost and a slight decrease in overall acceptance was observed after four and six months. However, during the six months the products had good acceptance; consequently, it was not possible to establish their rejection before this period. Research limitations/implications – More detailed studies regarding a longer storage period, including the physical and chemical measurements must be done to clarify other points about the influence of packaging and storage time on the sensory profile of functional diet guava preserve added with prebiotics. Therefore, researchers are encouraged to test the proposed propositions further. Practical implications – The development of a functional and sugar-free preserve is a good alternative to provide a product that meets the actual consumer desires and adds value to the product. However, there are technological challenges when adding functional components and substituting sugar in foods. Thus, this study provides important information for the development of sugar-free and functional products, and to prolong their shelf life. Originality/value – There are few studies with respect to the sensory aspects during the storage of functional preserves. Thus, this work will aid future studies, supporting the development of functional and sugar-free products and contributing to the product variety in the market.
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    Mixed Brazilian Cerrado fruits preserves without added sugar : the effect of bodying agents.
    (2019) Teixeira, Taísa Rezende; Schiassi, Maria Cecília Evangelista Vasconcelos; Pereira, Patrícia Aparecida Pimenta; Souza, Vanessa Rios de; Lago, Amanda Maria Teixeira; Borges, Soraia Vilela; Queiroz, Fabiana
    Purpose: The purpose of this paper is to evaluate the effect of the bodying agents (erythritol, sorbitol, xylitol and polydextrose) and their mixtures on the preparation of mixed Brazilian Cerrado fruit preserves (marolo, soursop and sweet passion fruit). Design/methodology/approach: The simplex mixture design was used for product optimization and the preserves evaluated by physical, physicochemical and sensory properties. The research data were analyzed using regression equations on SAS University and exploratory analysis by principal component analysis and parallel factors techniques on Sensomaker software. Findings: The results show that erythritol and polydextrose bodying agents should not be used as pure components because they provoked changes in the properties of the final product and negatively influenced the sensory attributes. While the high concentrations of xylitol and sorbitol provided better sensorial acceptance, being considered, therefore, good substitutes for sucrose. Practical implications: This research has shown it is feasible to use bodying agents in the preparation of mixed Brazilian Cerrado fruit preserves without added sugar. Social implications: The development of mixed preserves could increase population access to the Brazilian Cerrado fruits. In addition, sugar-free preserves are a viable alternative for adding value to the product and satisfy all the consumers. Originality/value: The combination of properties of two or more fruits and use of bodying agents can improve sensory, physical and physicochemical characteristics of the final product. However, there are technological challenges to evaluate in the preparation of mixed Brazilian Cerrado fruit preserves without added sugar.
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    Physical and physicochemical evaluation of different brands of traditional, low calorie and sugar-free guava preserves.
    (2013) Pereira, Patrícia Aparecida Pimenta; Souza, Vanessa Rios de; Carneiro, João de Deus Souza; Borges, Soraia Vilela; Ferreira, Larissa de Oliveira
    The aim of this study was to evaluate the physical and physicochemical properties of different brands of traditional (A, B and E), low calorie (C) and sugar-free (D) guava preserves. The results of these analysis indicated that there are differences in the physical and physicochemical properties of the different brands studied, and the partial and/or total exclusion of sugar from guava alters its physical and physicochemical properties, making the product redder; even added body and sweetening agents are incapable of conferring properties similar to those of conventional products. Regarding the relaxation test, the Maxwell model was the best for sample discrimination. The results also showed that the samples have a traditional standardization and that the sample labeled “low calorie” has a tendency to exhibit a composition similar to the conventional sample, which is evidence that brand (C) cannot be considered to be low calorie.
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    Rheological behavior of functional sugar-free guava preserves : effect of the addition of salts.
    (2013) Pereira, Patrícia Aparecida Pimenta; Souza, Vanessa Rios de; Teixeira, Taísa Rezende; Queiroz, Fabiana; Borges, Soraia Vilela; Carneiro, João de Deus Souza
    The addition of salts to carrageenan and locust bean gum gels functions to improve the characteristics of texture, thereby increasing gel strength. This effect is widely studied in gels of model systems but is studied to a lesser extent in complex systems, such as fruit preserves. The objective of this study was to evaluate the effect of adding salts on the rheological behavior of functional sugar-free guava preserves, as well as to correlate the rheological parameters. To this end, three types of texture properties were analyzed (texture profile, stress relaxation and uniaxial compression) in functional sugar-free guava preserves prepared with different concentrations of KCl and CaCl2 salt. The analyses were performed with a texturometer (Stable Micro Systems, Model TA - XT2i), and the parameters were analyzed using a Scott-Knott test at 5% probability, principal components analysis and Pearson correlation. CaCl2 was more effective for improving the characteristics of texture, especially gel strength (concentration near the F3: 0.33%), whereas KCl addition degraded gel strength. In the analysis of test relaxation, the Maxwell model parameters provided better discrimination between samples than the Peleg model parameters. Positive and negative correlations were observed, and the parameters of hardness, adhesiveness and elastic modulus ideal (E1) were the most correlated with other rheological parameters.
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    Sensory perception of Brazilian petit suisse cheese by a consumer panel using three-way internal and external preference maps.
    (2020) Pereira, Patrícia Aparecida Pimenta; Souza, Vanessa Rios de; Carneiro, João de Deus Souza
    This paper aims to study the sensory perception of Brazilian petit suisse cheese. Physicohemical (total sugar, total acidity, moisture, L*, a*, b* and soluble solids) physical (texture profile analysis- hardness, cohesiveness and gumminess) and sensory (color, appearance, taste, consistency and overall liking) analyses were performed. Three-way internal and external preference maps were used to evaluate the sensory profile of five different brands of strawberry flavor petit suisse (the only differences between them were the hydrocolloid bulking agents added) correlating with physical and physicochemical parameters. For this, the sisvar and sensoMaker software were used. According to the results, there is variation in the formulations of the petit suisse cheeses that are currently marketed in Brazil, with the exception of total acidity, moisture, and luminosity. Furtherore, Brazilian consumers prefer petit suisse cheese that has intermediate sweetness (7.67 °Bx to 11.67 °Bx) and reject those that are very sweet. In addition, products made with gelatin, pectin and locust bean and guar gums are more accepted.
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    Sugar-free guava preserve : influence of additives on textural properties.
    (2017) Pereira, Patrícia Aparecida Pimenta; Souza, Vanessa Rios de; Vieira, Mariele Antunes; Queiroz, Fabiana; Borges, Soraia Vilela; Carneiro, João de Deus Souza
    The development of sugar-free products requires the inclusion of many additives to provide all of the characteristics of sugar products. Thus, the present study aimed to evaluate the effect of different additives (fructooligosaccharide, thaumatin, sucralose, stevioside, maltitol, xanthan gum, locust bean gum, carrageenan, low methoxyl pectin and polydextrose) on the textural properties of functional sugar-free guava preserves. The Plackett and Burman design with 19 tests was used. Texture profile analysis and stress relaxation test were performed. The results were analyzed by analysis of the effects and principal component analysis. The low methoxyl pectin positively affected some parameters of the texture profile (hardness and gumminess) and relaxation test properties (η2 and k1). The other ingredients (except maltitol, which did not affect any textural parameters) affected only the texture profile parameters. The results also indicated that higher concentrations of gelling agents in the product resulted in greater influences on the textural properties.
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    The influence of sensory attributes on overall liking by a gamma regression model : an analysis of Cerrado mixed fruits jams.
    (2021) Pereira, Patrícia Aparecida Pimenta; Souza, Vanessa Rios de; Schiassi, Maria Cecília Evangelista Vasconcelos; Dias, Ana Clara Costa; Queiroz, Fabiana; Pinheiro, Ana Carla Marques; Borges, Soraia Vilela; Cirillo, Marcelo Ângelo
    Factors that influence the acceptability and preferences of consumers have been perceived as sensory attributes, such as color, appearance, flavor, and texture. Understanding which attributes are most important for overall liking would be helpful to establish meaningful criteria for product grading. Thus, in addition to the overall chemical and sensory qualities, it is important to appreciate which sensory attributes make a product pleasant or unpleasant to a consumer. In this context, the aim of this study was to evaluate the sensory attribute that contributes most to the overall liking by a gamma regression model using different formulations of mixed fruit jams made with Brazilian Cerrado fruits. Based on the proposed model, we concluded that appearance was the most important predictor of the overall liking of the assessors.