Abstract
Physical properties of dried pomegranate arils and its variation with moisture content play an important role in designing of equipment for storage, conveying and handling. Physical properties of dried pomegranate arils in the moisture content range of 7–28 % (d.b.) were investigated. Size (GMD), sphericity, weight of the thousand dried arils, true density, bulk density, angle of repose and coefficient of friction at different surfaces (wood, galvanized iron and aluminum) increased, whereas porosity, hardness and toughness decreased with increase in the moisture content. All physical properties except porosity and angle of repose were significantly affected by the change in moisture content at probability level p ≤ 0.01.
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Abbreviations
- ε:
-
Porosity (dimensionless)
- wt :
-
Frictional force required to slide the samples (N)
- wn :
-
Normal force (N)
- md :
-
Desired moisture content of the sample (% w.b.)
- mi :
-
Initial moisture content of the sample (% w.b.)
- Msi :
-
Initial mass of the sample (g)
- µ:
-
Coefficient of friction (dimensionless)
- µAl :
-
Coefficient of friction on aluminum surface (dimensionless)
- µGI :
-
Coefficient of friction on galvanized iron surface (dimensionless)
- µw :
-
Coefficient of friction on wood surface (dimensionless)
- a, b, c:
-
Axial dimensions of arils (mm)
- Al:
-
Aluminum
- ANOVA:
-
Analysis of variance
- D:
-
Diameter of heap (m)
- GI:
-
Galvanized iron
- GMD:
-
Geometrical mean diameter (mm)
- H:
-
Hardness (N)
- H′:
-
Height of heap (m)
- M:
-
Moisture content (% d.b.)
- p :
-
Probability level
- Q:
-
Quantity of distilled water (g)
- R2 :
-
Coefficient of determination
- S:
-
Sphericity (dimensionless)
- T:
-
Toughness (N-mm)
- TSS:
-
Total soluble solids
- W1000 :
-
Weight of the thousand dried arils (g)
- τ:
-
True density (kg/m3)
- ϕ:
-
Angle of repose (°)
- \( {\varvec{\uprho}} \) :
-
Bulk density (kg/m3)
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Acknowledgments
The authors are thankful to the Director, Indian Agricultural Research Institute, New Delhi and Dean, University College of Science, M. L. Sukhadia University, Udaipur for providing necessary facilities for the experimentation.
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Dak, M., Jaaffrey, S.N.A. & Gupta, R.B. Moisture-dependent physical properties of dried pomegranate arils. Food Measure 8, 234–240 (2014). https://doi.org/10.1007/s11694-014-9190-7
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DOI: https://doi.org/10.1007/s11694-014-9190-7