Effect of Extrusion Processing Variables on Finger Millet Flours with Respect to Their Functional Properties Using Response Surface Methodology
Journal Title: Current Journal of Applied Science and Technology - Year 2017, Vol 23, Issue 2
Abstract
Finger millet is fiber rich nutritious food which can be used by diabetic patients and also by healthy persons to maintain body weight owing to their inherent good amount of resistant starch and dietary fiber. Various degrees of structural transformations in the starches can be obtained through wide range of degree of cooking possible through extrusion processing. Response surface methodology was used to study the effect of amylose content (19.42%, 24.19%, 25.74%), moisture (21, 23 and 25%), screw speed (250, 300, 350 rpm) and barrel temperature (160,180 200°C) and their interactive effect on the extrudate properties. Percentage amylose in the finger millet flours was found to have significant effect on the bulk density, sectional expansion index and resistant starch of the extrudates. Expansion of extrudates was negatively correlated to amylose (p=0.022). Barrel temperature was found to be most prominent for modification of RS in finger millet extrudates. Higher amylose content lead to formation of more resistant starch in extrudates of finger millet. The effect of screw speed and barrel temperature was mostly seen on the water absorption index and water solubility index. Quadratic regression model (R2> 0.68) was found appropriate to model the physico-chemical parameters of the exrudates as function of extruder and raw material properties.
Authors and Affiliations
Shrikrishna Nishani, Shalini Gaur Rudra, Eldho Verghese
Keywords
Related Articles
- EP ID EP318415
- DOI 10.9734/CJAST/2017/34495
- Views 115
- Downloads 0
Numerical Prediction of Ammoniacal Nitrogen Concentrations Profile in Soil within the Vicinity of Soluos Dumpsite in Lagos State, Nigeria
The presence of pollutants in soil is a threat not only to human life but also to surface and groundwater integrity as well as the vegetations in the area. This work was carried out to predict the ammonia nitrogen concen...
Factors of Influence in the Results of 3D Measurements: Software Associated with Coordinate Measuring Machines
In three-dimensional metrology, the means of 3D measurements have been widely multiplied in recent years, in metrology laboratories, in production workshops, with the evolution of technology in general, the software asso...
Analysis of Dispersion and Nonlinear Property in Doping Defected Core Spiral Photonic Crystal Fiber
We propose a novel nearly zero-dispersion fiber (NZDF) at the operating wavelength based on GeO2 doped SiO2 square defected core spiral photonic crystal fiber (dd-SPCF). The 2-D finite element method with perfectly match...
Development of the Model for Simulation of Transient Processes in Cables and Power Lines
Aims: The paper presents a model of the power line and the equivalent scheme for the simulation of the transient processes. Many constructions of conductive lines are such that mutual parameters (inductance, capacitance)...
Nursery Performance of Male Clones of Poplar (Populus deltoides Bartr.) under Temperate Conditions of Kashmir Valley
Fifteen (15) male clones of Populus deltoides (Twelve clones procured from WIMCO and three local clones) were evaluated in nursery to study their growth performance. The investigations revealed that significant interclon...