Effects of Moisture on Some Engineering Properties of Dried Date Fruits (Phoenix Dactylifera L.) Relevant To Its Handling, Processing and Storage
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Date fruits arrive in the high-humidity southern Nigerian market in a dried state and are highly hygroscopic. Some engineering properties (EP) relevant to the design of handling, processing, and storage equipment for this hygroscopic dried fruit were studied as a function of moisture content. The EP determined were: length, width, and thickness (L, W, T); geometric mean diameter (Dg); arithmetic mean diameter (Da); square mean diameter (Ds); equivalent mean diameter (De); surface area (S); aspect ratio (AR); specific surface area (Ss); sphericity (φ); mass (M); volume (V); density (D); porosity (ε); angle of repose (ζ); and coefficient of static friction (CoF) on three structural surfaces — glass (CoFg), plywood (CoFp), and galvanised steel (CoFgs) — at five moisture content levels (MCL) ranging from 6.08 to 16.23% (wet basis). Each EP was evaluated on 500 replicates, comprising 100 replicates per MCL. All measurements followed standard procedures reported in the literature. Mean values (±SD) were: L = 35.47 ± 3.40 mm; W = 17.53 ± 1.65 mm; T = 15.65 ± 1.53 mm; Dg = 21.32 ± 1.69 mm; Da = 22.88 ± 1.85 mm; Ds = 21.98 ± 1.75 mm; De = 22.06 ± 1.76 mm; S = 20257.69 ± 4864.71 mm²; AR = 0.496 ± 0.044; Ss = 6.03 ± 1.60 mm²/ml; M = 6.03 ± 1.60 g; V = 6.43 ± 1.60 cm³; D = 0.94 ± 0.06 g cm⁻³; ε = 40.42 ± 3.93%; ζ = 35.35 ± 2.82°; CoFg = 0.357 ± 0.047; CoFp = 0.338 ± 0.070; and CoFgs = 0.268 ± 0.034. All EP increased with increasing moisture content, with the exception of ζ, which showed an inverse relationship until the penultimate MCL before rising at 16.23%. Analysis of variance confirmed that the effect of moisture content was statistically significant (p ≤ 0.05) for thickness, density, porosity, and CoF on all three surfaces. CoFp exhibited the highest values at all MCL studied. The results of this study are intended to support food engineers and processing equipment designers working with dried date fruits.
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Ajav, E., & Fakayode, O. (2013). Physical Properties of Moringa (Moringa oleifera) Seeds in relation to an Oil Expeller Design. Agrosearch, 13(1), 115. https://doi.org/10.4314/agrosh.v13i1.11
Akar, R., & Aydin, C. (2005). Some physical properties of gumbo fruit varieties. Journal of Food Engineering, 66(3), 387–393. https://doi.org/10.1016/j.jfoodeng.2004.04.005
Asiz, A. T. A., Tarique, M., Abdalla, H., & Yuliarti, O. (2025). Structural properties evaluation of extracted date fruit (Phoenix dactylifera L.) juice at different extraction temperatures. Applied Food Research, 5(2), 101247. https://doi.org/https://doi.org/10.1016/j.afres.2025.101247
Asoegwu, S., Ohanyere, S. O., Kanu, O. P., & Iwueke, C. N. (2006). Physical Properties of African Oil Bean Seed (Pentaclethra macrophylla). International Commission of Agricultural Engineering, Manuscript FP 05 006, VIII(Agricultural Engineering International: the CIGR Ejournal). https://hdl.handle.net/1813/10528
Asoiro, F. U., Ezeoha, S. L., Ugwu, C. B., & Ezenne, G. I. (2017). Physical properties of unshelled, shelled and kernel of velvet tamarind ( Dialium guineense) fruit from Nigeria. Cogent Food & Agriculture, 3(1), 1287618. https://doi.org/10.1080/23311932.2017.1287618
B. A., A. (2012). Effect of Moisture Content on Some Physical Properties of Moringa Oleifera Seed. IOSR Journal of Agriculture and Veterinary Science, 1(5), 12–21. https://doi.org/10.9790/2380-0151221
Bajpai, A., Kumar, Y., Singh, H., Prabhakar, P. K., and Meghwal, M. (2020). Effect of moisture content on the engineering properties of Jamun (Syzygium cumini) seed. Journal of Food Process Engineering, 43(2), e13325. https://doi.org/10.1111/jfpe.13325
Bamgboye, A. I., & Adebayo, S. E. (2012). Seed moisture dependent on physical and mechanical properties of Jatropha curcas. Journal of Agricultural Technology, 8. http://www.ijat-aatsea.com
Bamgboye, A. I., & Adejumo, I. O. (2009). Physical properties of Roselle (Hibiscus sabdariffa L.) seed. Agricultural Engineering International 2009, Vol.11(Manuscript 1154). http://www.cigrjournal.org/.../1164
Coşkuner, Y., & Karababa, E. (2007). Physical properties of coriander seeds (Coriandrum sativum L.). Journal of Food Engineering, 80(2), 408–416. https://doi.org/10.1016/j.jfoodeng.2006.02.042
Darvishi, H. (2012). Moisture-Dependent Physical and Mechanical Properties of White Sesame Seed. American-Eurasian J. Agric. & Environ. Sci, 12(2), 198–203.
Fraser, B. M., Verma, S. S., & Muir, W. E. (1978). Some physical properties of fababeans. Journal of Agricultural Engineering Research, 23(1), 53–57. https://doi.org/10.1016/0021-8634(78)90079-3
Ghonimy, M., Alayouni, R., Alshehry, G., Barakat, H., and Ibrahim, M. M. (2025). Assessing the physico-mechanical properties of three date fruit varieties for conserving keeping and appearance qualities. Foods, 14(11), 1838. https://doi.org/10.3390/foods14111838
Güner, M. (2007). Pneumatic conveying characteristics of some agricultural seeds. Journal of Food Engineering, 80(3), 904–913. https://doi.org/10.1016/j.jfoodeng.2006.08.010
Hacıseferoğulları, H., Gezer, İ., Özcan, M. M., & MuratAsma, B. (2007). Post-harvest chemical and physical–mechanical properties of some apricot varieties cultivated in Turkey. Journal of Food Engineering, 79(1), 364–373. https://doi.org/10.1016/j.jfoodeng.2006.02.003
Heidarbeig, K., Ahmadi, H., Kheiralipo, K., & Tabatabaee, A. (2008). Some Physical and Mechanical Properties of Khinjuk. Pakistan Journal of Nutrition, 8(1), 74–77. https://doi.org/10.3923/pjn.2009.74.77
Kashaninejad, M., Mortazavi, A., Safekordi, A., & Tabil, L. G. (2006). Some physical properties of Pistachio (Pistacia vera L.) nut and its kernel. Journal of Food Engineering, 72(1), 30–38. https://doi.org/10.1016/j.jfoodeng.2004.11.016
Keramat-Jahromi, M., Rafiee, S., Jafari, A., Bousejin, M. R. G., Mirasheh, R., & Mohtasebi, S. S. (2008). Some physical properties of date fruit (cv. Dairi). Agricultural Engineering International: The CIGR Ejournal, 22.
Kingsly, A. R. P., Singh, D. B., Manikantan, M. R., & Jain, R. K. (2006). Moisture dependent physical properties of dried pomegranate seeds (Anardana). Journal of Food Engineering, 75(4), 492–496. https://doi.org/10.1016/j.jfoodeng.2005.04.033
Koocheki, A., Razavi, S. M. A., Milani, E., Moghadam, T. M., Abedini, M., Alamatiyan, S., & Izadkhah, S. (2007). Physical properties of watermelon seed as a function of moisture content and variety. Int. Agrophysics, 21, 349–359.
Mohsenin, N. N. (1980). Physical properties of plant and animal materials (Third printing). Gordon and Breach.
Onwe, D. N., Umani, K. C., Olosunde, W. A., & Ossom, I. S. (2020). Comparative analysis of moisture-dependent physical and mechanical properties of two varieties of African star apple (Chrysophyllum albidum) seeds relevant in engineering design. Scientific African, 8, e00303. https://doi.org/10.1016/j.sciaf.2020.e00303
Owolarafe, O. K., Olabige, T. M., & Faborode, M. O. (2007). Macro-structural characterisation of palm fruit at different processing conditions. Journal of Food Engineering, 79(1), 31–36. https://doi.org/10.1016/j.jfoodeng.2006.01.024
Owolarafe, O. K., & Shotonde, H. O. (2004). Some physical properties of fresh okro fruit. Journal of Food Engineering, 63(3), 299–302. https://doi.org/10.1016/j.jfoodeng.2003.08.002
Oyelade, O. J., Odugbenro, P. O., Abioye, A. O., & Raji, N. L. (2005). Some physical properties of African star apple (Chrysophyllum alibidum) seeds. Journal of Food Engineering, 67(4), 435–440. https://doi.org/10.1016/j.jfoodeng.2004.05.046
Paksoy, M., & Aydin, C. (2004). Some physical properties of edible squash (Cucurbita pepo L.) seeds. Journal of Food Engineering, 65(2), 225–231. https://doi.org/10.1016/j.jfoodeng.2004.01.019
Peng, F., Fang, F., Xiang, R., and Liu, D. (2022). Engineering properties of Cassia tora L. seeds and meal as a function of moisture content. Scientific Reports, 12, 8651. https://doi.org/10.1038/s41598-022-12748-7
Pliestic, S., Dobricevic, N., Filipovic, D., & Gospodaric, Z. (2006). Physical Properties of Filbert Nut and Kernel. Biosystems Engineering, 93(2), 173–178. https://doi.org/10.1016/j.biosystemseng.2005.11.008
Sachin, V. W., Pravin, D. U., & Dilip, A. P. (2012). Determination of physical properties of soybean at different moisture levels. Agricultural Engineering International : The CIGR e-Journal, 14(2). https://cigrjournal.org/index.php/Ejounral/article/view/2081
Sayas-Barberá, E., Paredes, C., Salgado-Ramos, M., Pallarés, N., Ferrer, E., Navarro-Rodríguez de Vera, C., & Pérez-Álvarez, J. Á. (2024). Approaches to Enhance Sugar Content in Foods: Is the Date Palm Fruit a Natural Alternative to Sweeteners? 13(1). https://doi.org/https://doi.org/10.3390/foods13010129
Seifi, M. R., & Alimardani, R. (2010). Comparison of moisture-dependent physical and mechanical properties of two varieties of corn (Sc 704 and Dc 370). Australian J. Agric. Eng., AJAE 1, 170–178.
Shepherd, H., & Bhardwaj, R. K. (1986). Moisture-dependent physical properties of pigeon pea. Journal of Agricultural Engineering Research, 35(4), 227–234. https://doi.org/10.1016/S0021-8634(86)80060-9
Sitkei, G. (1986). Mechanics of agricultural materials. Elsevier ; Distribution for the USA and Canada, Elsevier Science Pub. Co.
Sobukola, O. P., & Onwuka, V. I. (2011). EFFECT OF MOISTURE CONTENT ON SOME PHYSICAL PROPERTIES OF LOCUST BEAN SEED (PARKIA FILLICOIDEA L.): EFFECT OF MOISTURE CONTENT ON PHYSICAL PROPERTIES. Journal of Food Process Engineering, 34(6), 1946–1964. https://doi.org/10.1111/j.1745-4530.2009.00511.x
Suthar, S. H., & Das, S. K. (1996). Some Physical Properties of Karingda [Citrullus lanatus (Thumb) Mansf] Seeds. Journal of Agricultural Engineering Research, 65(1), 15–22. https://doi.org/10.1006/jaer.1996.0075
Tavakoli, H., Rajabipour, A., & Mohtasebi, S. S. (2009). Moisture-dependent engineering properties of soybean grains. Agricultural Engineering International: The CIGR Ejournal. Manuscript 1110, XI.
Topuz, A., Topakci, M., Canakci, M., Akinci, I., & Ozdemir, F. (2005). Physical and nutritional properties of four orange varieties. Journal of Food Engineering, 66(4), 519–523. https://doi.org/10.1016/j.jfoodeng.2004.04.024
Tscheuschner, H.-D. (1987). N. N. Mohsenin: Physical Properties of Plant and Animal Materials. Structure, Physical Characteristics and Mechanical Properties. 2. Aufl. 891 Seiten, zahlr. Abb. und Tab. Gordon and Breach Science Publishers, New York u. a. 1986. Preis: 140.—£. Food / Nahrung, 31(7), 702–702. https://doi.org/10.1002/food.19870310724
Zareiforoush, H., Alizadeh, M. R., & Komarizadeh, M. H. (2009). Effect of Moisture Content on Some Physical Properties of Paddy Grains. Research Journal of Applied Sciences, Engineering and Technology, 1(3), 132–139.
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