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Optimization of Phenolics and Flavonoids Extraction Conditions and Antioxidant Activity of Roasted Yerba-Mate Leaves (Ilex paraguariensis A. St.-Hil., Aquifoliaceae) using Response Surface Methodology 42
BASSANI,DÉBORA C.; NUNES,DOMINGOS S.; GRANATO,DANIEL.
This study focused on maximizing the extraction of total phenolics and flavonoids as well as the antioxidant activity measured by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay from roasted yerba mate (Ilex paraguariensis) as a function of time (5, 7.5 and 10 min) and temperature of extraction (60, 75 and 90°C). The data were subjected to Response Surface Methodology and the results showed that polynomial equations were significant, did not present lack of fit, and presented adjusted determination coefficients above 98%, proving their suitability for prediction purposes. Using the desirability function, the optimum operating conditions to obtain a higher extraction of antioxidants was found to be 10 min of extraction at 90°C, and the tea prepared under...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phenolic composition; Correlation analysis; Desirability function; Phytochemicals; Functional foods.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200923
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Development and optimization of a mixed beverage made of whey and water-soluble soybean extract flavored with chocolate using a simplex-centroid design 116
OLIVEIRA,Dóris Faria de; GRANATO,Daniel; BARANA,Ana Cláudia.
Abstract This study aimed to combine the nutritional advantages of whey and soybean by developing a type of chocolate beverage with water-soluble soybean extract dissolved in whey. Different concentrations of thickeners (carrageenan, pectin and starch – maximum level of 500 mg.100 mL-1) were tested by a simplex-centroid design. Several physicochemical, rheological, and sensory properties of the beverages were measured and a multi-response optimization was conducted aiming to obtain a whey and soybean beverage with increased overall sensory impression and maximum purchase intention. Beverages presented mean protein levels higher than 3.1 g.100 mL-1, a low content of lipids (< 2 g.100 mL-1) and total soluble solids ≥20 g.100 mL-1. Response surface...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carrageenan; Cassava starch; Pectin; Design of experiments; Desirability function; Dairy foods.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000300413
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Optimization of native Brazilian fruit jelly through desirability-based mixture design 116
CURI,Paula Nogueira; ALMEIDA,Aline Botelho de; PIO,Rafael; LIMA,Luiz Carlos de Oliveira; NUNES,Cleiton Antônio; SOUZA,Vanessa Rios de.
Abstract Faced with the need to enhance the availability and add even more value to Brazilian native fruits, combined with the demand and the great importance of developing mixed fruit products, the objective of this work was to evaluate the processing potential of jabuticaba, pitanga and cambuci in the preparation of jellies, based on sensory and nutritional characteristics, through desirability-based mixture design. Given the high sensory and nutritional quality of the jellies obtained through this study we found that the development of mixed jelly containing the Brazilian Native fruits jabuticaba, pitanga and cambuci is perfectly feasible and of great interest. According to the sensory and nutritional characteristics the fruit mixed jelly should...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mixed fruit jelly; Nutritional quality; Sensory acceptance; Desirability function.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000200388
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Effect of vermicompost, worm-bed leachate and arbuscular mycorrizal fungi on lemongrass (Cymbopogon citratus (DC) Stapf.) growth and composition of its essential oil 69
León-Anzueto,Elizabeth; Abud-Archila,Miguel; Dendooven,Luc; Ventura-Canseco,Lucía María Cristina; Gutiérrez-Miceli,Federico A.
The objective of this study was to investigate the effect of vermicompost, worm-bed leachate (WBL) and Glomus mosseae, an arbuscular mycorrhizal fungi (AMF), on growth of lemongrass (Cymbopogon citratus (DC.) Stapf). A response surface methodology, i.e. a three-level Box Benhen design with three repetitions and three blocks, was applied to optimize biomass production, essential oil yield and its composition. Application rates of Glomus mosseae were 0, 1 or 2 g plant-1, vermicompost 0, 5 or 10 g plant-1 and WBL 0, 10 and 20%. The AMF had no significant effect on the variables tested, but vermicompost had a significant effect on essential oil yield and WBL on essential oil yield, myercene concentration and shoot dry weigh (p < 0.05). It was found that...
Tipo: Journal article Palavras-chave: Citral; Desirability function; Lemongrass; Myrcene; Optimization; Response surface methodology.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000600005
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OPTIMIZATION OF ANAEROBIC TREATMENT OF CASSAVA PROCESSING WASTEWATER 70
Fleck,Leandro; Tavares,Maria H. F.; Eyng,Eduardo; Andrade,Minéia A. de M. de; Frare,Laercio M..
ABSTRACT The main contribution of this research is to optimize the operating conditions of an anaerobic reactor applied to the treatment of wastewater from cassava starch production. A 20-L anaerobic reactor was used, operating in a batch system, with temperature control. Temperature and inoculum total volatile solids (TVSi) were controlled for evaluation of effects on the removals of chemical oxygen demand (COD) and reactor total volatile solids (TVSr) by means of a Central Composite Rotational Design (CCRD). Twelve trials were analyzed simultaneously by the desirable function approach. The higher COD removal (96.82%) was obtained at 42 °C and 12.0% TVSi. The largest TVSr removal (69.31%) was registered at 45 °C and 10.0% TVSi. Equations representative of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anaerobic reactor; Biogas; Desirability function; Mathematical modeling.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300574
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