scholarly journals Optimization of the bioactive compounds content in raspberry during freeze-drying using response surface method

2015 ◽  
Vol 21 (1-1) ◽  
pp. 53-61 ◽  
Author(s):  
Vesna Tumbas-Saponjac ◽  
Gordana Cetkovic ◽  
Sladjana Stajcic ◽  
Jelena Vulic ◽  
Jasna Canadanovic-Brunet ◽  
...  
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Bioactive Compounds ◽  
Freeze Drying ◽  
Optimal Conditions ◽  
Total Anthocyanin ◽  
Factors Affecting ◽  
Surface Method ◽  
Freeze Dried ◽  
Experimental Values

The production of high-quality freeze-dried raspberry was studied by response surface method. Two independent variables, temperature (X1) and time (X2) were determined as the most important factors affecting the final product quality estimated by the responses: total phenol (Y1), total anthocyanin (Y2), vitamin C (Y3) and total bioactive compounds (Y4) content. A two-factor central composite design was used for freeze-drying experiments. The second order polynomial models obtained were found to be significant (p<0.05) for all responses. The statistical analysis of experimental data indicated that only quadratic time variable (X22) had significant (p<0.05) effect on all responses. The optimal conditions for all responses combined were found to be: -31 ?C and 35 h. The experimental values of all responses obtained under optimal conditions were in good agreement with predicted values which enables the use of the proposed mathematical models for optimization of investigated process.

Removal of humic acid from composted hog waste by the white-rot fungus, Phanerochaete chrysosporium

2015 ◽  
Vol 72 (1) ◽  
pp. 92-98 ◽  
Author(s):  
Junying Liu ◽  
Yunmeng Song ◽  
Roger Ruan ◽  
Yuhuan Liu
Keyword(s):  
Humic Acid ◽  
Response Surface ◽  
Phanerochaete Chrysosporium ◽  
Response Surface Method ◽  
Experimental Results ◽  
White Rot ◽  
White Rot Fungus ◽  
Optimal Conditions ◽  
Surface Method ◽  
Strong Agreement

Abstract The potential hazards of humic acid (HA) associated with hog waste effluent, coupled with increasing awareness of environmental problems, have prompted many countries to control disposal of effluents into water bodies and to maximize removal of HA. Here we employed the white-rot fungus, Phanerochaete chrysosporium, to degrade the HA in composted hog waste effluent, evaluated by the response surface method. Preliminary experiments demonstrate that pH, temperature and quantity of inoculum are significant variables determining success of the fungus. In total, 13 experiments were conducted with three variables designated as A (pH), B (temperature) and C (inoculum amount). The optimal conditions for reduction of HA by P. chrysosporium are pH 6, 31.5°C and an inoculum quantity of 5.86 g. Predicted and experimental results exhibit strong agreement, indicating efficiency in the model obtained by response surface method. Therefore, P. chrysosporium is an effective micro-organism for removal of HA from composted hog waste effluent.

scholarly journals Study on Key Factors of Adsorption of Phosphorus by Steel Slag Filter Based on Response Surface Method

2018 ◽  
Vol 53 ◽  
pp. 03050 ◽  
Author(s):  
Jiabin Wang ◽  
Xiaoyu Wang ◽  
Liping Qiu ◽  
Tianhang Li ◽  
Cong Yu
Keyword(s):  
Reaction Time ◽  
Response Surface ◽  
Response Surface Method ◽  
Phosphorus Removal ◽  
Steel Slag ◽  
Molar Ratio ◽  
Factors Affecting ◽  
Surface Method ◽  
Initial Ph ◽  
Calcium Phosphorus

Excessive phosphorus emission is one of the important reasons for the eutrophication of water. At the same time, phosphorus is a significant mineral resource. In this paper, the response surface method is used to study the key influencing factors of phosphorus removal by steel slag filter and its action. Four factors affecting the dosage, initial pH, reaction time and calcium-phosphorus molar ratio were selected. The phosphorus removal was used as the response value. The interaction between various factors was established by Box-Behnken response surface analysis. The optimal conditions were determined by equation regression analysis: dosage = 2 cm3; initial pH = 7; molar ratio of calcium to phosphorus was 2:1; reaction time = 2 h.

scholarly journals Evaluation and optimization of parameters in the measurement for airborne scanner using response surface method

2019 ◽  
Vol 52 (5-6) ◽  
pp. 354-368
Author(s):  
Ding-bang Zhang ◽  
Yi Zhang ◽  
Zheng Shen ◽  
Tao Cheng ◽  
Yongtao Bai
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Three Dimensional ◽  
Flight Speed ◽  
Aspect Angle ◽  
Surface Method ◽  
Flight Height ◽  
Experimental Values ◽  
Working Parameters ◽  
Three Dimensional Coordinate

This paper aims to evaluate the working parameters and try to make an optimized use of the parameters which affect the measurement accuracy of airborne scanner. First, based on response surface method, three levels of configuration values of each parameter are selected, respectively, and 53 response surface experiments are designed. Second, three-dimensional coordinate errors of the scan points in each response surface experiment are calculated by comparing the coordinates measured by airborne scanner and common measuring apparatus. Third, by analyzing the experimental error through response surface method, the optimum configuration values of the parameters are determined. Meanwhile, the configuration characteristics and change laws of each parameter on three-dimensional coordinate errors are also realized. Results show that the most influencing parameters are flight height, flight speed, ground feature, aspect angle, scan frequency, and course angle. The optimum values for these parameters are found to be 46.14 m/s for flight speed, type 2 for ground feature, 88 Hz for scan frequency, 54.4° for course angle, 24.12° for aspect angle, and 215.92 m for flight height. The verification experiments showed that the predicted values from the response surface method are quite close to the experimental values, which validate the proposed approach.

scholarly journals Optimization of the Sunset Yellow Dye removal by electrocoagulation using response surface method

2021 ◽  
Author(s):  
Mitra Afshar Moghaddam ◽  
Kambiz Seyyedi
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Flow Rate ◽  
Current Density ◽  
Dye Removal ◽  
Electrolysis Time ◽  
Optimal Conditions ◽  
Sunset Yellow ◽  
Surface Method ◽  
Effluent Flow Rate

Abstract In recent years, among the various treatment methods, the electrocoagulation process has been used for the treatment of effluents containing various dye pollutants. Sunset yellow (S.Y.) azo dye is one of the common food colors widely used in various food industries. This study investigated the removal of the dye S.Y. from aqueous media by the electrocoagulation method in an electrochemical reactor using concentric iron electrodes. The experiments were designed by the Response Surface Method (RSM) with the help of the Minitab software in such a way that the effect of various process-influencing parameters, such as current density, electrolysis time, electrolyte concentration, pH of the solution, and the effluent flow rate, on the desired pollutant removal efficiency was investigated. According to the results of the process optimization by RSM, the optimal conditions for the process were obtained as follows: pH of 10, current density of 2.65 mA/cm2, electrolysis time of 42.32 min, initial dye concentration of 20 mg/L, and effluent flow rate of 2.5 L/min. Under the above optimal conditions, the efficiency of dye removal was more than 99%.

A Proposal of PSO with Presumption Function of the Solution Landscape by Response Surface Method

2014 ◽  
Vol 134 (9) ◽  
pp. 1293-1298
Author(s):  
Toshiya Kaihara ◽  
Nobutada Fuji ◽  
Tomomi Nonaka ◽  
Yuma Tomoi
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Surface Method
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