Optimization of Texture Determination of ‘Yali' by Texture Analyzer

[Objectives] This study was carried out to determine texture parameters for texture profile analysis （TPA）, and optimize the texture determination of ‘Yali’ by texture analyzer.[Methods] The traditional varieties of ‘Yali’ were taken as the materials, and texture parameters were determined at different compression rates and deformations at target.[Results] In the process of the TPA, the deformation at target had an extremely significant influence on 8 TPA texture parameters, namely, the hardness, cohesiveness, springiness, adhesiveness, gumminess, resilience, fracturability, and chewiness （ P ≤0.01）, while the compression rate had significant influence on the hardness and gumminess （ P ≤0.05）, had an extremely significant influence on fracturability （ P ≤0.01）, and had no significant influence on other 5 TPA parameters.[Conclusions] Taking the compression rate of 1 mm/s and 20% deformation at target as the experimental conditions for TPA could avoid the impact load of high speed on the tissue and objectively reflect the textural characteristics of ‘Yali’ pulp tissue.

Acceptability of a reformulated grain-based food:Implications for increasing whole grain consumption

Idli is a popular Indian breakfast dish consumed by many people all over the world,made from white rice(Oryza sativum)(75%–80%)and black gram(Phaseolus mungo)(20%–25%).Idli’s wide consumption makes it ideal as a model for studying acceptability of a food reformulated with whole grains.The objective was to compare acceptability regarding texture,color and sensory properties when white rice was replaced with brown rice at 5 replacement levels(0%(control),25%,50%,75%and 100%).Textural attributes and L*a*b*color values were measured by a texture analyzer and a Chroma meter,respectively.Informed and blind sensory tests were conducted.Instrumental hardness and gumminess were proportional to the level of whole grain replacement,while springiness and cohesiveness did not vary by replacement level.Liking ratings for overall acceptability were similar at the three lowest levels of brown rice replacement.Although brown rice replacement reduced the liking score for various sensory attributes,especially for 75%and 100%replacements,more than 90%of the panelists preferred brown-rice-blended idli as their first choice.There are ample opportunities to increase whole grain consumption through reformulation of regularly consumed traditional refined grain foods by partial or complete replacement with whole grains.©2013 Beijing Academy of Food Sciences.Production and hosting by Elsevier B.V.All rights reserved.