Mechanical behavior of Deveci pear cultivar affected by maturation

Yıl 2019, Cilt: 1 Sayı: 2, 39 - 43, 30.12.2019

Elçin Yeşiloğlu Cevher Yeşim Benal Öztekin

Öz

The present study examines the mechanical behavior of ‘Deveci’ pear
cultivar produced in Turkey in terms of harvesting periods. Penetration tests
were applied to the determined sides (bloom side, lateral side and stem side)
of pear fruit harvested on three different maturation dates (October 5-15-25).
According to the test results, it was found that harvesting period had
different effects on mechanical properties of pears. Decrease was found in
rupture force, rupture energy, deformation and firmness values of pears as the
harvest date progressed. Rupture force values were as 52.69, 45.56 and 41.95 N
in the first, second and third harvesting dates, respectively. Deformation was
5.57 in the first harvesting date and as 5.12 mm in the third harvesting date.
The present study showed that firmness values of mature pear fruit were less.
Firmness value was 9.59 N/mm in the first harvesting date and 8.09 N/mm in the
third harvesting date. The highest firmness value was found on the stem side of
pears. 

Anahtar Kelimeler

Pear; mechanical properties; rupture force; rupture energy; firmness

Kaynakça

• Altisent, M. R. (1991). Damage mechanisms in the handling of fruits: Progress in agricultural physics and engineering. Commonwealth Agricultural Bureaux (CAB) International, Willingford, UK, 231-255.
• Alayunt, F.N. (2000). Physical properties of biological materials. Ege University, Publication of Faculty of Agriculture No. 541, Izmir, Turkey, ISBN: 975-483-464-4. Er, Ş. H. (2008). Researches on the biology of pear pest Cacopsylla pyri (L.) (Homoptera: Psyllidae) in the province of Ankara. Doctorate Thesis, Ankara University, Institute of Science Department of Plant Production, Ankara.
• Ercisli, S. (2004). A short review of the fruit germplasm resources of Turkey. Genetic Resources and Crop Evolution, 51(4), 419-435.
• Kachhadiya, S., & Jethva, K. R. (2017). Physico-chemical properties of custard apple. International Journal of Biochemistry Research & Review, 20(1), 1-13.
• Mohsenin, N.N. (1970). Physical properties of plant and animal material. Gordon and Breach. New York.
• Mohsenin, N. N. (1980). Physical properties of plant and animal material. Gordon and Breach Science Publishers Inc., New York, USA.
• Nabizadeh, F., & Esmaiili, M. (2007). Mechanical properties of golden delicious apple affected by maturation and storage. Food Engineering, 78, 622.
• Ozturk, A. and Ozturk, B. (2014). The rootstock influences growth and development of ‘Deveci’ pear. Turkish Journal of Agricultural and Natural Sciences, (Special Issue), 1, 1049-1053.
• Yahya, A., K. Hamdan, T. A. Ishola and H. Suryanto. (2013). Physical and mechanical properties of Jatropha curcas l. fruits from different planting densities. Journal of Applied Sciences 13(7), 1004-1012.
• Yurtlu, Y. B, Yeşiloğlu, E (2012). Mechanical behaviour and split resistance of chestnut under compressive loading. Journal of Agricultural Sciences 17(4), 337-346.