Effect of antibrowning agents on fresh-cut potato tubers using frequency filtering of biospeckle images

• Published in: Laser physics Vol. 25; no. 5; pp. 55601 - 55608
• Main Authors: Minz, Preeti D, Ansari, Md Zaheer, Nirala, A K
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.05.2015
• Subjects: antibrowning agent; biospeckle; respiration rate; weight loss
• ISSN: 1054-660X; 1555-6611
• DOI: 10.1088/1054-660X/25/5/055601

Our present work aims to study the physiological changes of chemically treated fresh-cut potato tubers and then to correlate such changes with the results of the non destructive and non invasive laser biospeckle technique. The effect of chemically treated (citric acid (CA-0.5% and 1.0%) and citric acid + sodium chloride (CS-0.5% and 1.0%)) fresh-cut potato tubers on physiological activities such as the respiration rate and weight loss at cold storage has been studied for eight consecutive days. In addition, biospeckle recording has been carried out for eight consecutive days for all the chemically treated samples and from captured images, and the numerical results (inertia moment (IM)) with and without frequency filtering have been obtained. A comparatively higher respiration rate and lower weight loss is observed for CS treated samples than that of CA treated samples. The results of the IM obtained with the exclusion of the higher frequency show a similar nature to the respiration rate and also, separations of the respiration curves at two concentrations for both the treated samples were well correlated with the IM curves. The concentration effect for both the treatments on the IM value with the exclusion of lower frequencies has also been presented. Thus the IM method with filtration of particular bands is able to separate the different physiological phenomena with one another and is also able to differentiate the chemical effect on the samples.