جستجوی مقالات مرتبط با کلیدواژه « جذب روغن » در نشریات گروه « مهندسی شیمی، نفت و پلیمر »

Grass pea is rich protein whereas it not consumed widely. Grass pea has same nutritional value with Clover, Alfalfa, Sainfoin and other forage plants which it has 12-22% protein. Extrusion cooking changes properties of Grass pea. Therefore, extruded Grass pea could use independently or as alternative in various formulations. The objective of this study was to apply response surface methodology by Design expert software to estimate the physicochemical and sensory properties of grass pea extrudate and to evaluate of the extrusion process include feed moisture (12-20%), die temperature (120-160°C) and screw speed (120-180 rpm) on properties of extruded Grass pea ( porosity, hardness, sensory properties) and its flour ( color, oil absorbtion index) were evaluated. By increasing feed moisture hardness increased and porosity, lightness (L*), yellowness (b*), redness (a*), oil absorption index and overall acceptability of extruded Grass pea decreased. Increasing die temperature increased redness, oil absorption index of extruded Grass pea whereas hardness, yellowness and overall acceptability of extruded Green pea decreased. Increasing screw speed increased redness, oil absorption index and overall acceptability of extruded Grass pea whereas hardness and yellowness decreased. Process conditions to produce best porosity, texture, color, oil absorption and overall acceptability were 12% moisture content, 137 ° C temperature and 137 rpm screw speed. In this condition, the best porosity, hardness, color, highest and lowest amounts of oil absorption will be obtain.

In this work silica nanoparticles were synthesized in a semi-continuous precipitation method. The effects of reaction time, concentration of reactants and pH were investigated on oil absorption and specific surface area (SSA) of synthesized nanoparticles in a full factorial design of experiment (DOE) with three parameters. In this design, each parameter was investigated in two levels. The reaction time and pH were main parameters that affecting on particles oil absorption. BET results showed that all of the three parameters could significantly affect the specific surface area of the product. Morphology and particle size distribution of precipitated nanosilica were investigated using transmission electron microscopy. The particle size of the synthesized silica nanoparticles was observed to be smaller than 20 nm. The average specific surface was found to be of 230 m2/g and average oil absorption 235 g/100 g. The thermogravimetric analysis resultshowed that the total silanol density in the nanosilica was 15 nm-2. J. Color Sci. Tech. 2(2008), 57-66.© Institute for Colorants, Paint and Coatings.