Determination of some mechanical properties of two apple varieties with the purpose decreasing losses

Aslanzadeh Nasir Abadi, Mohammad (2019) Determination of some mechanical properties of two apple varieties with the purpose decreasing losses. Masters thesis, University of Mohaghegh Ardabili.

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Abstract

Aim Research: in the process of doing this research two purposes are continued: A)measuring some mechanical attributes of apple( rupture force, rupture energy, evolution in rupture &toughness point) B)Examining the manner of variety, speed of loading, and period of warehousing on some mechanical attributes of apple and determining interaction among independent variables(variety,loading speed,and warehousing period). Research methodology: in this research , rupture force , rupture energy , evolution in rupture and toughness point of two varieties red and golden apples were determined. For this purpose , the cylindrical samples whit a diameter of 10mm and height of 15mm were prepared from two red and golden delicious apples from gardens of meshkin shahr. The analysis of the results variance in factorial design in format of completely random desing with 3 factors ,variety, 6 warehouse periods include harvest time and 10 , 20 , 30 , 40 , 50 , days after harvest at in loading speeds of 10 , 40 , 70 , 100 mm/min and 10 repetitions by using the MSTAT-C softwar and was performed and for comparing the mean of the main effects and the mutual effects of Duncan,s multiple rang test was used. Findings: the results indicated that the main effect of variety and the main effect of warehouse period for rupture force , rupture energy , evolution in rupture and toughness point , and the main effect of variety and the main effect of loading speed and triple mutual effect of variety, loading speed and warehouse period for rupture force of double mutual effect of variety and warehouse period for rupture energy , rupture and toughness force in probability level 1% are meaningful . also the main effect of loading speed for evolution in rupture point and double mutual effect of variety and loading speed for rupture force in probability level 5% has been meaningful. Conclusion: by increasing the warehouse period in both varieties , the rupture of samples early occurres and therefore , by increasing the warehouse period , the fruit loses early its natural state and the resistance against mechanical strikes is lessen .

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