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| Registros recuperados: 85 | |
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| Alam, Md. Shafiq; Ahuja, Geetika; Gupta, Kalika. |
| Carrot juice was treated with pectinase at various enzyme concentrations (0.01% to 0.1%), process temperatures (350C to 550C) and incubation time (40 to 120 min). The effect of these enzyme treatments on filterability, clarity, turbidity and viscosity of the juice were studied by employing a second order central composite design. The coefficient of determination (R2) values for filterability, clarity, turbidity and viscosity were greater than 0.85. Statistical analysis showed that filterability, clarity, viscosity and turbidity were significantly correlated to enzyme concentration, incubation temperature and incubation time. Enzyme concentration was the most important factor affecting the characteristics of the carrot juice as it exerted a highly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Processing and Food Engineering; Post Harvest Tecnology carrot juice; Enzyme clarification; Response surface methodology. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2804 |
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| Soares,Adriana Lourenço; Olivo,Rubison; Shimokomaki,Massami; Ida,Elza Iouko. |
| The effect of alpha-tocopheryl acetate (AT) supplementation and exogenous application of this vitamin E associated with phytic acid (PA) on chicken breast meat WOF development was assessed. Control group was fed with 7.7IU of AT/kg of ration and supplemented group was fed with 200.0IU of AT/kg of ration. Dietary vitamin E as measured by TBARS inhibited WOF development by 78.9; 69.0; 60.7 and 46.5% (p<0.05) during storage at 6° C for 0, 1, 3 and 5 days, respectively. This inhibition was significantly increased (p<0.05) by 86.1; 91.6; 92.9 and 95.3% during storage at 6° C for 0, 1, 3 and 5 days, respectively, when 2mM PA was added in supplemented breast meat. In the exogenous experiment, through Response Surface Methodology design it was found out AT... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Warmed over flavour; Vitamin E; Phytic acid; Lipid oxidation inhibition; Response surface methodology; Breast poultry meat. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000100008 |
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| Martos,María A.; Martinez Vazquez,Francisco; Benassi,Fernando O.; Hours,Roque A.. |
| Response surface methodology was used for optimization of polygalacturonase (PG) and pectinesterase (PE) production in submerged fermentation by A.niger. A Central Composite Experimental Design was applied, consisting of 22 experiments, including eight central points. Variables studied were: fermentation time (24 to 120 h), pH (3.5 to 6.5) and initial concentration of pectin (5 to 20 g/l). Maximum PE production was 220 U/l, after 74 h of culture, in a medium containing 20 g/l of pectin (pH 6.5). The optimal conditions for PG production were pH: 4.1, 20 g/l of pectin and 94 h of fermentation with a maximum value of 1032 U/l. Under these conditions, the PE production was low (15 U/l). A liquid extract with high PG activity and low PE activity could be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pectinases; Polygalacturonase; Pectinesterase; Aspergillus niger; Response surface methodology; Citrus pectin. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300007 |
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| Garlapati,Vijay Kumar; Vundavilli,Pandu Ranga; Banerjee,Rintu. |
| The aim of this work was to apply a modeling integrated optimisation approach for a complex, highly nonlinear system for an extracellular lipase extraction process. The model was developed using mutation, crossover and selection variables of Differential Evolution (DE) based on central composite design of Response Surface Methodology. The experimentally validated model was optimized by DE, a robust evolutionary optimization tool. A maximum lipase activity of 134.13 U/gds (more than 36.28 U/gds compared to one variable at a time approach) was observed with the DE-stated optimum values of 25.01% dimethyl sulfoxide concentration, 40 mM buffer, 128.52 min soaking time and 35ºC with the DE control parameters, namely number of population, generations, crossover... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modeling; Optimization; Lipase extraction; Response surface methodology; Differential evolution; Solid state fermentation. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500001 |
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| Tan,Mu; Liu,Hui; Li,Zhemin; Sun,Xiaowen; Zheng,Zhiming; Zhao,Genhai. |
| ABSTRACT The purpose of this research was to enhance the production of vitamin K2 by fermentation optimization and Arachis hypogaea supplementation in Flavobacterium sp. mutant SP-L-01. Optimized culture condition were as follows: 6-days shake-flask culture at 37oC with initial pH value 7.0 ± 0.2, shaking speed in 120 r/min and medium volume of 30 mL with 2% inoculums. After optimization of fermentation medium by response surface methodology (RSM), optimized medium were maltose 23.8 g/l, glucose 9.69 g/l, beef extract 15 g/l, K2HPO4 4.5 g/l，NaCl 3.0 g/l and MgSO4·7H2O 0.3 g/l. Production of vitamin K2 after optimization reached to 10.97 mg/l, which is 79.25% higher than that before optimization (6.12 mg/l). 3 mg/mL of arachis hypogaea was added into the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis hypogaea; D-(+)-catechin; Response surface methodology; Vitamin K2. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100501 |
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| Singh,Jagdish; Kaur,Pawandeep. |
| The aim of this work was to isolate the potent bacterial strains for the production of cellulose enzyme. A total 30 bacterial isolates showed positive results for the cellulase production but highest enzyme activity was shown by isolate JS 14. From the morphological and biochemical reactions, the isolate was identified as Bacillus sp. Cellulase production was studied by this strain using response surface methodology (RSM). A central composite design (CCD) quadratic response surface was applied to explicate the parameters that significantly affected cellulase production in solid substrate fermentation (SSF). The wheat bran concentration and incubation period were significant factors. The process parameters optimized with response surface methodology was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cellulase; Response surface methodology; Optimization. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000400004 |
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| Izidoro,Dayane Rosalyn; Scheer,Agnes de Paula; Sierakowsk,Maria-Rita. |
| In this work, the rheological behaviour of emulsions (mayonnaises) stabilized by green banana pulp using the response surface methodology was studied. In addition, the emulsions stability was investigated. Five formulations were developed, according to design for constrained surfaces and mixtures, with the proportion, respectively: water/soy oil/green banana pulp: F1 (0.10/0.20/0.70), F2 (0.20/0.20/0.60), F3 (0.10/0.25/0.65), F4 (0.20/0.25/0.55) and F5 (0.15/0.225/0.625) .Emulsions rheological properties were performed with a rotational Haake Rheostress 600 rheometer and a cone and plate geometry sensor (60-mm diameter, 2º cone angle), using a gap distance of 1mm. The emulsions showed pseudoplastic behaviour and were adequately described by the Power Law... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Green banana pulp; Emulsion; Rheology; Response surface methodology. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600026 |
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| Peng,Yanjie; He,Yanhui; Wu,Zhansheng; Lu,Jianjiang; Li,Chun. |
| The plant growth-promoting rhizobacterial strain Pseudomonas putida Rs-198 was isolated from salinized soils from Xinjiang Province. We optimized the composition of the low-cost medium of P. putida Rs-198 based on its bacterial concentration, as well as its phosphate-dissolving and indole acetic acid (IAA)-producing capabilities using the response surface methodology (RSM), and a mathematical model was developed to show the effect of each medium component and its interactions on phosphate dissolution and IAA production. The model predicted a maximum phosphate concentration in medium containing 63.23 mg/L inorganic phosphate with 49.22 g/L corn flour, 14.63 g/L soybean meal, 2.03 g/L K2HPO4, 0.19 g/L MnSO4 and 5.00 g/L NaCl. The maximum IAA concentration... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pseudomonas putida Rs-198; Low-cost medium; Phosphorus-dissolving; IAA; Response surface methodology. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400013 |
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| Malheiros,Patrícia S.; Sant’Anna,Voltaire; Todorov,Svetoslav D.; Franco,Bernadette D.G.M.. |
| Lactobacillus sakei subsp. sakei 2a is a bacteriocinogenic lactic acid bacterium isolated from Brazilian pork sausage, capable of inhibiting the growth of microbial pathogens, mainly Listeria monocytogenes. In order to optimize bacteriocin production for industrial applications, this study evaluated the effect of supplementation of MRS broth with glucose, Tween 20, Tween 80, sodium citrate, potassium chloride and cysteine, and effect of the initial pH and temperature of incubation of the medium on production of bacteriocins by L. sakei 2a. Adding glucose and Tween 20 to the medium, an initial pH of 5.0 or 5.5, and incubation temperatures of 25 °C or 30 °C resulted to the highest bacteriocin yields. Thus, a 24 factorial design with the four variables was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactobacillus sakei; Bacteriocin; Response surface methodology; Optimization. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300825 |
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| Registros recuperados: 85 | |
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