Optimization of acid hydrolysis from the hemicellulosic fraction of Eucalyptus grandis residue using response surface methodology

Application of Response Surface Methodology to Optimize Alkali Concentration, Corn Stover Particle Size, and Extruder Parameters for Maximum Sugar Recovery

“…The proposed quadratic models in terms of actual variables are given below for glucose (Y G ), xylose (Y X ), and combined sugar (Y C ) recovery, where X 1 , X 2 , X 3 , and X 4 represent barrel temperature (°C), screw speed (rpm), alkali concentration (% w/v), and particle size (mm) of corn stover, respectively. Similar equations were reported for acid hydrolysis of sugarcane bagasse (Neureiter et al, 2002), oil palm empty fruit bunch (Rahman et al, 2007), eucalyptus (Canettieri et al, 2007), for concentrated acid pretreatment of pine wood (Miller & Hester, 2007 ), acid catalyzed fractionation and enzymatic hydrolysis of flax shives (Kim & Mazza, 2008), hot-compressed water pretreatment of Japanese beech hydrolysis (Xin & Saka, 2008), and extrusion pretreatment of corn stover (Karunanithy & Muthukumarappan, 2011a). Those equations predict the responses well with high R 2 and low probability values.…”

“…RSM has been widely used in various fields ranging from food process operations including extrusion (Altan et al, 2008;Jorge et al, 2006), food product development, media composition in biotechnology to bioprocessing such as enzymatic hydrolysis and fermentation. Recently, RSM has been successfully applied to biomass pretreatment by many researchers (Canettieri et al, 2007;Kim & Mazza, 2008;Neureiter et al, 2002;Rahman et al, 2007;Xin & Saka, 2008). Earlier extrusion pretreatment studies conducted by the authors yielded encouraging results and however, the extrusion factors including alkali concentration were not optimized.…”

Enzymatic hydrolysis of grass carp myofibrillar protein and antioxidant properties of hydrolysates

“…"Adeq precision" measures the signal-to-noise ratio and, usually, a ratio greater than 4 is desirable (Canettieri et al 2007). In the present study, the "Adeq precision" ratio was 20.146, which was an adequate signal- to-noise ratio.…”

Optimization of goldstripe sardine (Sardinella gibbosa) protein hydrolysate using Alcalase® 2.4L by response surface methodology Optimización de hidrolisato de proteína de Sardinela dorada (Sardinella gibbosa) usando Alcalase® 2.4L a través de RSM

“…The value of the predicted R 2 (0.768 and 0.922) was similar to that of the adjusted R 2 . The model had an adequate precision value that measures the signal-to-noise ratio; a ratio greater than 4 is desirable (Canettieri, Rocha, Carvalho, & Silva, 2007), and this value for DH and NR was 16.25. Because the lack-of-fit hypothesis test was not significant (p 4 0.05), the model was fitted to the data.…”