scholarly journals DETERMINING OPTIMIZED CONDITIONS FOR REMOVAL OF CHLOROPHYLL IN EXTRACTED LIQUID FROM NEEM LEAVES BY DISTILLED WATER BY RESPONSE SURFACE METHOD

2011 ◽  
Vol 14 (4) ◽  
pp. 36-42
Author(s):  
Do Van Vu ◽  
Nguyen Hong Nguyen ◽  
Tri Ly Minh Nguyen
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Ethanol Extract ◽  
Distilled Water ◽  
Surface Method ◽  
Neem Leaves ◽  
Initial Content ◽  
Almost All ◽  
Optimized Conditions ◽  
And Storage

Chlorophyll content in liquid ethanol extract of neem’s leaves has bad effect on quality and storage time of the extract. In this study, we tried to remove remaining chlorophyll in the liquid ethanol extract of neem’s leaves by distilled water. The results showed that after chlorophyll removing, the liquid extract still retained almost all the biological activity ingredients (limonoid). Three effecting factors, i.e., (i) The time to cool to precipitate chlorophyll in the extracted liquid, (ii) The initial content of chlorophyll; (iii) The ratio between the extracted liquid and distilled water added all affect chlorophyll removal efficiency, have been studied. The Response Surface Method (RSM) showed that, the optimal conditions for removing chlorophyll process, the ratio between extracted liquid and distilled water respectively is 16.8 μg/ml and 1.3 (13:10; v:v). The time to cool to precipitate chlorophyll in the extracted liquid didi not have significantly affect on the performance of the removing chlorophyll’s contents.

Optimization on Influencing Factors of Fracture Toughness of Corundum-Mullite Toughened by In Situ Synthesized Mullite Whiskers by Response Surface Methodology

2012 ◽  
Vol 581-582 ◽  
pp. 819-822 ◽  
Author(s):  
Bin Meng ◽  
Jin Hui Peng
Keyword(s):  
Fracture Toughness ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Response Surface Method ◽  
Sintering Temperature ◽  
Surface Method ◽  
Mullite Whiskers ◽  
Optimized Conditions ◽  
Addition Amount

The corundum-mullite was toughened by in-situ synthesized mullite whiskers and the process parameters influencing the fracture toughness of corundum-mullite, such as sintering temperature, addition amount of AlF3 and V2O5, were optimized by means of response surface method. Corundum-mullite with fracture toughness of 9.44 MPa.m-1/2 could be obtained under the optimized conditions, i.e. sintering temperature of 1400°C, 4.8 wt.% of AlF3 and 5.8 wt.% of V2O5. The results showed that it was feasible to prepare corundum-mullite toughened by in-situ synthesized mullite whiskers by the optimized parameters. In addition, an accurate model based on response surface method was proposed to predict the experimental results.

scholarly journals Activated Carbon Production from Agricultural Biomass Using Response Surface Method (RSM) for Cd (II) Removal

2014 ◽  
Vol 69 (3) ◽  
Author(s):  
Mutah Musa ◽  
Akira Kikuchi ◽  
Zaiton Abdul Majid ◽  
Jafariah Jaafar ◽  
Mohd Razman Salim
Keyword(s):  
Activated Carbon ◽  
Response Surface ◽  
Response Surface Method ◽  
Correlation Coefficients ◽  
Good Prospect ◽  
Surface Method ◽  
Model Equations ◽  
Optimized Conditions ◽  
Temperature Time

The production of activated carbon (AC) from sugarcane bagasse (SCB) was carried out using central composite design of response surface method to run a limited number of experiments with the possibility of revealing the interaction of three selected factors of temperature, time and nitrogen/steam flowrate at different levels. Two second order quadratic regression model equations were developed using statistical analysis with Design Expert® software. The models were used for the prediction of removal of Cd2+ and carbon yield. Correlation coefficients (R2) were 0.957 for removal and 0.985 for yield, showing the sufficiency of the model in predicting response within 13 experimental runs. Characterization of the product with optimal performance which was produced at 900oC, with nitrogen/steam flow of 100 mL/min and activation time of 30 minutes, was carried out. The performance showed this AC sample was able to remove 62.42% Cd2+ from an aqueous solution with concentration 2 mg/L within 2 hours at optimized conditions. Experimental results indicated that AC from SCB had good prospect for Cd2+ removal.

scholarly journals Optimization Waxing Concentration and Storage Temperature of Mangosteen Using Response Surface Method

2009 ◽  
Vol 23 (2) ◽  
pp. 133-139
Author(s):  
Andriani Lubis ◽  
◽  
Emmy Darmawati ◽  
Sutrisno Sutrisno ◽  
◽  
...  
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Storage Temperature ◽  
Surface Method ◽  
And Storage

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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