Sundaram Gunasekaran

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Literature which reports on optical methods of nondestructive quality evaluation of agricultural and biological materials is reviewed. The basic laws and interaction of light with biological materials are presented with particular regard to their applicability in quality evaluation. A wide range of agricultural and biological materials such as fruits,(More)
Visible indication based on the aggregation of colloidal nanoparticles (NPs) is highly advantageous for rapid on-site detection of biological entities, which even untrained persons can perform without specialized instrumentation. However, since the extent of aggregation should exceed a certain minimum threshold to produce visible change, further(More)
Highly selective mercury detection at partially oxidized graphene/poly(3,4-ethylenedioxythiophene):poly (styrenesulfonate) nanocomposite film-modified electrode Partially oxidized graphene flakes (po-Gr) were obtained from graphite electrode by an elec-trochemical exfoliation method. As-produced po-Gr flakes were dispersed in water with the assistance of
The gelatinization properties of starch extracted from corn and waxy corn dried at different temperatures were determined at various water contents and heating rates by differential scanning calorimetry. All gelatinization transition temperatures increased with drying temperature and heating rate. Onset and peak temperatures remained relatively constant,(More)
The scaling of viscoelastic properties of heat-induced gels prepared from egg white was investigated at five pH values (pH 3 – 11) and various protein concentrations (5– 20%) using small-deformation oscillatory rheological measurements. Protein gels were formed by heating samples at 80 8C for 1 h followed by cooling to 25 8C. Storage modulus, G 0 and(More)
Numerical simulation was performed to analyze flow field and heat transfer developed inside a deep-channel, single-screw cheese stretcher channel. Modifications to the traditional flat-plate model of single-screw extruder geometry were applied to address flight effects and channel curvature effects. The finite difference and finite element methods were used(More)
The effect of continuous steady shear stress (CSSS) on rennet-induced coagulation of milk was studied by measuring the change in viscosity of the system with time. Continuous shear stress (< or =0.5 Pa) applied during coagulation did not counteract the network formation at standard cheese-making conditions. In fact, CSSS of 0.2 Pa promoted coagulation by(More)
India launched National Agroforestry Policy on 10th February, 2014 which has the potential to substantially reduce poverty in rural India and revive wood based industry, besides integrating food production with environmental services. The policy is not only crucial to India’s ambitious goal of achieving 33 per cent forest and tree cover but also to mitigate(More)
Nanocrystalline zinc oxide (ZnO) particles coated with whey protein (WP) were synthesized in the weak basic aqueous solution condition at room temperature. The X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements confirmed the ZnO/WP nanoscaled composite structure. The average composite granules size was about 300 nm and the(More)
A device especially designed for uniaxial creep test was used in this study. Cheddar cheeses of different fat content were used. To study the linear viscoelastic response of the cheese, temperature of 40 degrees C and stress of 1119.5 Pa were chosen. Tests were carried out at cheese ages of 1, 3, 6, and 12 wk after production date. A six-element Kelvin(More)
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