Effect of particle size of pulse flour on the physical and sensory properties of mushroom analogues Thirumuruga Ponbhagavathi T R1,*, Kanchana S2, Hemalatha G1, Vellaikumar S3, Kalpana K3 1Professor and Head, Dept. of Food Science and Nutrition, (Agricultural College and Research Institute), Tamil Nadu Agricultural University, Madurai-625104, Tamil Nadu 2Professor and Head, Dept. of Human Development and Family Studies, (Agricultural College and Research Institute), Tamil Nadu Agricultural University, Madurai-625104, Tamil Nadu 3Dept. of Biotechnology, (Agricultural College and Research Institute), Tamil Nadu Agricultural University, Madurai-625104, Tamil Nadu *Corresponding author: ponbhagavathi2015@gmail.com
Online published on 16 September, 2020. Abstract The particle size distribution in formulation of extruded products is an important factor to standardize a high quality product. The influence of differential particle size of horse gram and cowpea flours on physical and sensory properties was studied. A formulation comprising 50–75% of pulses of two particle size levels i.e. BS 20 and BS 60 sieve size particles and 25–50% mushrooms was made up and extruded with feed moisture content of 12%, an extrusion temperature of 120°C and a screw speed of 150rpm. The developed mushroom analogues from larger fraction treatments (T1-T8) showed higher water absorption index (WAI) 3.25–5.28 g/g, lower water solubility index(WSI) 22.78–32.43%, higher expansion ratio (ER) 1.15–1.86, lower bulk density(BD) 0.13–0.29 g/ml and higher Hunter L value 31.78–45.68 when compared with fine particle size treatments (T9-T16) having WAI 3.05–5.20 g/g, WSI 23.49–32.60%, ER 1.07–1.73,BD 0.19–0.35 g/ml, and Hunter L value 28.83–31.9. Moreover, increased particle size reduced the hardness of the mushroom analogues to 10.89–14.68 N when compared to smaller fractions having higher hardness (13.18–15.34 N). The sensory scores for overall acceptability obtained for analogues ranged from 5.93–8.33. Treatments having larger particle size scored higher overall acceptability score (6.75–8.33) whereas the small size particles resulted in overall acceptability score between (5.93–7.66). Top Keywords Cowpea, Horse gram, Mushroom, Particle size, Sensory scores. Top |