Effects of different compression positions (length, width and thickness) and speeds (0.5, 1.0, 1.5 and 2.0 mm/s) on some cracking characteristics (force, energy and specific deformation required for initial rupture) and kernel extraction quality of hazelnuts cv. Sivri were investigated. The effects of shell thickness and geometric mean diameters of samples on these cracking characteristics and kernel extraction quality of hazelnuts were also evaluated. For this purpose two groups of nuts, which were small (first group) and bigger (second group) than 16.40 mm, were compressed with a universal testing machine. The lowest rupture force (167 N) and energy (105 J) were obtained from along the length direction in second group hazelnuts. Shell thickness and geometric mean diameters of hazelnuts affected, clearly, cracking characteristics and kernel extraction quality of tested samples. Rupture force and energy for cracking increased with increasing shell thickness and geometric mean diameters, but specific deformation decreased. As the compression speed increased, the force and energy required for cracking in the first group of samples increased, whereas this change did not show stability in the second group. In all combinations, kernel extraction quality decreased with the increasing compression speed. Results revealed that there was no relationship between kernel extraction quality and geometric mean diameter. As a result, when the average values of two groups were taken into account, the lowest rupture force (199.5 N) was obtained in length position, while cracking nuts at the width position gave the best result (5.00) in terms of kernel extraction quality. Compression speeds over 1 mm/s are not recommended for cracking of hazelnut cv. Sivri according to investigated speeds in this research.
Hazelnut cracking rupture force energy kernel extraction quality
Birincil Dil | Türkçe |
---|---|
Konular | Bahçe Bitkileri Yetiştirme ve Islahı |
Bölüm | Makaleler |
Yazarlar | |
Yayımlanma Tarihi | 31 Aralık 2019 |
Yayımlandığı Sayı | Yıl 2019 Cilt: 8 Sayı: Özel Sayı |