Effect of Storage Time on Some Mechanical Properties and Bruise Susceptibility of Pears and Apples

Yeşim Benal YURTLU

Makale detayları

Effect of Storage Time on Some Mechanical Properties and Bruise Susceptibility of Pears and Apples

Yazarlar:

Yeşim Benal YURTLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2005 Vol.29 Issue 6, pp.469-482

Belge Tipi:

Makale

Yayın Tarihi:

5/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000808960

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Anahtar kelimeler:

Özet:

 

This research was conducted to evaluate the effect of storage time on some mechanical properties and bruise susceptibility of Williams and Ankara varieties of pear and Starkspur Golden Delicious and Starking varieties of apple. The research was performed in 2 stages. Firstly, compression tests were conducted to determine the mechanical properties of fruits. Secondly, an impact test was used to determine the bruise susceptibility of test materials. Impact tests were performed using a pendulum with 50 cm arm length. The tests were carried out at 5 storage times (harvest day, 1st, 2nd, 3rd and 4th month) and 3 drop heights for the impact tests (10, 15 and 20 cm). During the compression tests, a curve-ended cylindrical probe with 8 mm diameter was used to compress the fruit at 7 mm min-1 load velocity. Results of the compression tests indicate that the bioyield point force, modulus of elasticity and deformation energy of the pear and apple varieties decreased with increasing storage time. Modulus of elasticity decreased from 1.68 to 0.51 MPa for Williams, from 1.34 to 0.8 MPa for Ankara, from 1.45 to 0.88 MPa for Starkspur Golden Delicious and from 1.51 to 1.1 MPa for Starking with increasing storage time. The impact test results show that the bruise susceptibility values of Ankara and Starking are higher than those of the other varieties when a comparison is made between 2 varieties. The bruise susceptibilities of Williams and both apple varieties tended to decrease with increasing storage time, whereas that of Ankara increased. According to the analyses of variance results, variety and storage time are significant for the bioyield point force, modulus of elasticity, bruising volume, absorbed energy and bruise susceptibility. Furthermore, drop height significantly affected the bruise susceptibility of Ankara, while there was no significant effect on bruise susceptibility for Williams or the 2 apple varieties.

 

This research was conducted to evaluate the effect of storage time on some mechanical properties and bruise susceptibility of Williams and Ankara varieties of pear and Starkspur Golden Delicious and Starking varieties of apple. The research was performed in 2 stages. Firstly, compression tests were conducted to determine the mechanical properties of fruits. Secondly, an impact test was used to determine the bruise susceptibility of test materials. Impact tests were performed using a pendulum with 50 cm arm length. The tests were carried out at 5 storage times (harvest day, 1st, 2nd, 3rd and 4th month) and 3 drop heights for the impact tests (10, 15 and 20 cm). During the compression tests, a curve-ended cylindrical probe with 8 mm diameter was used to compress the fruit at 7 mm min-1 load velocity. Results of the compression tests indicate that the bioyield point force, modulus of elasticity and deformation energy of the pear and apple varieties decreased with increasing storage time. Modulus of elasticity decreased from 1.68 to 0.51 MPa for Williams, from 1.34 to 0.8 MPa for Ankara, from 1.45 to 0.88 MPa for Starkspur Golden Delicious and from 1.51 to 1.1 MPa for Starking with increasing storage time. The impact test results show that the bruise susceptibility values of Ankara and Starking are higher than those of the other varieties when a comparison is made between 2 varieties. The bruise susceptibilities of Williams and both apple varieties tended to decrease with increasing storage time, whereas that of Ankara increased. According to the analyses of variance results, variety and storage time are significant for the bioyield point force, modulus of elasticity, bruising volume, absorbed energy and bruise susceptibility. Furthermore, drop height significantly affected the bruise susceptibility of Ankara, while there was no significant effect on bruise susceptibility for Williams or the 2 apple varieties.

Makale detayları

Effect of Storage Time on Some Mechanical Properties and Bruise Susceptibility of Pears and Apples

Yazarlar:

Yeşim Benal YURTLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2005 Vol.29 Issue 6, pp.469-482

Belge Tipi:

Makale

Yayın Tarihi:

5/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000808960

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Mechanical Properties

Modulus of Elasticity

Bruise

Bruise Susceptibility

Pear

Apple

Sayı

Makale detayları

Effect of Storage Time on Some Mechanical Properties and Bruise Susceptibility of Pears and Apples

Yazarlar: Yeşim Benal YURTLU

Yayıncı: TUBITAK

Dergi: Turkish Journal of Agriculture and Forestry 2005 Vol.29 Issue 6, pp.469-482

Belge Tipi: Makale

Yayın Tarihi: 5/2005

Belge Dili: Türkçe

Document ID (Org No.): 2000808960

Sıklık: İki Aylık

eISSN: 1303-6173

pISSN: 1300-011X

Mechanical Properties

Modulus of Elasticity

Bruise

Bruise Susceptibility

Pear

Apple

Sayı

Yazarlar:

Yeşim Benal YURTLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2005 Vol.29 Issue 6, pp.469-482

Belge Tipi:

Makale

Yayın Tarihi:

5/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000808960

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X