Moisture-dependent physical properties of niger (Guizotia abyssinica Cass.) seed |
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| Authors: | WK Solomon AD Zewdu |
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| Institution: | 1. New Use Agriculture and Natural Plant Products Program, Department of Plant Biology and Pathology, Rutgers University, 59 Dudley Road, New Brunswick, NJ 08901, United States;2. Department of Molecular Biology and Biochemistry, Rutgers University, 76 Lipman Drive, New Brunswick, NJ 08901, United States;3. Department of Medicinal Chemistry, Department of Pharmaceutical Science, Ernest Mario School of Pharmacy, Rutgers University, 160 Frelinghuysen Road, Piscataway, NJ 08854, United States;4. Rutgers Cooperative Extension Service, New Jersey Agricultural Research Station, New Brunswick, NJ, United States;1. Department of Physics, Channabasaveshwara Institute of Technology, VTU affiliated , Gubbi 572216, India;2. Department of Physics, Sree Siddaganga College for Women, Tumkur 572103, India;3. Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572103, India;4. Dayananda Sagar University, Shavige Malleshwara Hills, Kumaraswamy Layout, Bangalore 560078, India;5. Department of Physics, Lal Bahadur Shastry Government First Grade College, Bangalore 560032, India;6. Research Center, Department of Science, East West Institute of Technology, VTU affiliated, Bangalore 560091, India;7. Department of Physics, BMS Institute of Technology, VTU affiliated , Bangalore 560064, India;8. Department of Studies and Research in Environmental Science, Tumkur University, Tumkur 572103, India |
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| Abstract: | Moisture-dependent physical properties of niger (Guizotia abyssinica Cass.) seed were studied at 5.60, 12.99, 19.77, 27.08 and 31.65% moisture content (wet basis). The length, width, thickness and geometric mean diameter increased significantly (p < 0.05) from 3.86 to 4.06 mm, 0.96 to 1.02 mm, 0.86 to 0.96 mm and 1.47 to 1.59 mm, respectively with increase in moisture content from 5.60 to 31.65% whereas the increase in sphericity from 38.10 to 39.01% was not significant. Similarly, thousand seed mass, porosity and angle of repose increased (p < 0.05) linearly from 2.50 to 3.69 g, 41.76 to 47.65% and 29.86° to 39.12°, respectively with increase in moisture content under the experimental condition. The bulk density decreased significantly (p < 0.05) from 635.23 to 561.06 kg m?3 with increase in the moisture content range considered in the study, whereas the true density showed a slight increase from 1090.71 to 1098.42 kg m?3 with increase in moisture content from 5.60 to 27.08% followed by a drop from 1098.42 to 1071.75 kg m?3 as moisture content increased from 27.08 to 31.65%. Coefficient of static friction increased (p < 0.05) logarithmically from 0.34 to 0.51, 0.38 to 0.56 and 0.13 to 0.53 on mild steel, plywood and glass surfaces, respectively with increase in moisture content from 5.60 to 31.65%. |
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