Physical and Mechanical Properties of Some Walnut (Juglans regia L.) Cultivars

Altuntaş, Ebubekír; Özkan, Yakup

doi:10.2202/1556-3758.1349

Cited by 32 publications

(27 citation statements)

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“…'Yalova-1'). The results by Koyuncu et al (2004) and Altuntas and Ozkan (2008) supported the present research.…”

Section: Physical Propertiessupporting

confidence: 87%

“…The value of highest cracking force was found at width orientation, followed by suture and length orientations by Koyuncu et al (2004) for cv. 'Yalova-3' , 'Altuntas' and Ozkan (2008) for cvs. 'Bilecik' , 'Kaman' and 'Şebin' .…”

Section: Physical Propertiesmentioning

confidence: 99%

“…Previously some studies were conducted to determine physical and mechanical properties of several nuts such as cashew (Balasubramanian, 2001;Oloso and Clarke, 1993), neem (Visvanathan et al, 1996), macadamia (Braga et al, 1999), almond (Altuntas et al, 2010;Arslan and Vursavus, 2008;Aydin, 2002;Pliestic et al, 2008;), pistachio (Galedar et al, 2009;Kashaninejad et al, 2006) and walnut (Altuntas and Ozkan, 2008;Caglarirmak, 2003;Kocturk and Gurhan, 2007;Koyuncu et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Some Physico-Mechanical Nut and Kernel Properties of Two Walnut (Juglans regia L.) Cultivars

Erċışlı

Kara

Öztürk

et al. 2011

Not Bot Hort Agrobot Cluj

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Some physical such as length, width, thickness, mass, geometric mean diameter, sphericity and surface area and mechanical properties such as deformation at cracking, cracking force, energy absorbed and hardness of nuts and kernels were determined at three orientations first time for two walnut cultivars, namely 'Maraş-18' and 'Yalova-1' widely grown in Turkey. For nuts, the average length (45.48 mm), mass (12.70 g), geometric mean diameter (36.83 mm) and surface area (42.66 cm 2 ) were the highest in cv. 'Yalova-1' while width (34.18 mm), thickness (33.74 mm), shell thickness (1.48 mm) and sphericity (87.41%) were the highest in cv. 'Maraş-18' . For all the loading orientations, the values of deformation at cracking, cracking force, energy absorbed and hardness of cv. 'Maraş-18' were higher than those of cv. 'Yalova-1' . The effect of loading orientation to kernel extraction quality was found insignificant for both walnut cultivars.

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“…'Yalova-1'). The results by Koyuncu et al (2004) and Altuntas and Ozkan (2008) supported the present research.…”

Section: Physical Propertiessupporting

confidence: 87%

Section: Physical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of Some Physico-Mechanical Nut and Kernel Properties of Two Walnut (Juglans regia L.) Cultivars

Erċışlı

Kara

Öztürk

et al. 2011

Not Bot Hort Agrobot Cluj

View full text Add to dashboard Cite

show abstract

“…Dursun (1997), Koyuncu et al (2004a, b), Sharifian and Derafshi (2008), and Altuntas and Ozkan (2008) investigated the mechanical behavior of walnuts under compression loading. They emphasized that cracking orientation was an important parameter that affects the mechanical properties of walnut.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Moisture Content, Compression Speeds, and Axes on Mechanical Properties of Walnut Cultivars

Altuntaş

Erkol

2009

Food Bioprocess Technol

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In this study, the mechanical properties of walnut (Juglans regia L.) cultivars were investigated as a function of moisture content. The experiments were carried out at three moisture contents, compression speeds (0.5, 1, and 1.5 mm/s), and compression axes (X-, Y-, and Z-axes). The highest rupture force and rupture power in all moisture contents were obtained for walnut cultivars loaded along the Y-axis. Rupture force, rupture energy, and rupture power of walnuts decreased in magnitude with an increase of moisture content, while rupture force, specific deformation, rupture energy, and rupture power increased with an increase of compression speeds. The highest rupture force was obtained with load along the Y-axis as 410.4 N and 394.3 N and also the highest rupture force was recorded at 1.5 mm/s compression speed as 260.7 N and 377.1 N for Yalova-1 and Yalova-3 cultivars, respectively. A linear force decrease was observed from 320.5 N to 196.4 N and from 492.7 N to 247.1 N with increasing moisture content from 11.46% to 23.16% and from 11.25% to 19.47% for Yalova-1 and Yalova-3, respectively. The highest rupture force, specific deformation, rupture energy, and rupture power were obtained at 1.5 mm/s compression speed, while the lowest rupture force was obtained at 0.5 mm/s compression speed for walnut cultivars. The lower rupture force and rupture power were obtained with load along Zaxis for Yalova-1 and Yalova-3 walnut cultivars. The results revealed that the higher compression speed and Z-axis could be recommended for cracking of shelled walnuts.

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“…The shelled and kernel tea seeds were placed on the moving platform considering the variation of loading position (X and Y axes) and pressed with a plate fixed on the dynamometer until the shelled and kernel tea seeds ruptured. Force and time curves of shelled and kernel tea seeds were recorded The X-axis (length) is the longitudinal axis, while the Y-axis (width) is transverse axis containing the minor dimension (width) at right angles to the X-axis (Kılıçkan and Güner, 2008;Altuntas and Ozkan, 2008). Three replication were made for each test, and for each test 10 samples were used.…”

Section: Materıals and Methodsmentioning

confidence: 99%

SOME ENGINEERING PROPERTIES OF SHELLED AND KERNEL TEA (Camellia sinensis) SEEDS

Altuntaş¹,

Yildiz²

2017

Afr J Tradit Complement Altern Med

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Background: Camellia sinensis is the source of tea leaves and it is an economic crop now grown around the World. Tea seed oil has been used for cooking in China and other Asian countries for more than a thousand years. Tea is the most widely consumed beverages after water in the world. It is mainly produced in Asia, central Africa, and exported throughout the World. Some engineering properties (size dimensions, sphericity, volume, bulk and true densities, friction coefficient, colour characteristics and mechanical behaviour as rupture force of shelled and kernel tea (Camellia sinensis) seeds were determined in this study. Materials and Methods: This research was carried out for shelled and kernel tea seeds. The shelled tea seeds used in this study were obtained from East-Black Sea Tea Cooperative Institution in Rize city of Turkey. Shelled and kernel tea seeds were characterized as large and small sizes. Results: The average geometric mean diameter and seed mass of the shelled tea seeds were 15.8 mm, 10.7 mm (large size); 1.47 g, 0.49 g (small size); while the average geometric mean diameter and seed mass of the kernel tea seeds were 11.8 mm, 8 mm for large size; 0.97 g, 0.31 g for small size, respectively. The sphericity, surface area and volume values were found to be higher in a larger size than small size for the shelled and kernel tea samples. The shelled tea seed's colour intensity (Chroma) were found between 59.31 and 64.22 for large size, while the kernel tea seed's chroma values were found between 56.04 68.34 for large size, respectively. The rupture force values of kernel tea seeds were higher than shelled tea seeds for the large size along X axis; whereas, the rupture force values of along X axis were higher than Y axis for large size of shelled tea seeds. The static coefficients of friction of shelled and kernel tea seeds for the large and small sizes higher values for rubber than the other friction surfaces. Conclusion: Some engineering properties, such as geometric mean diameter, sphericity, volume, bulk and true densities, the coefficient of friction, L*, a*, b* colour characteristics and rupture force of shelled and kernel tea (Camellia sinensis) seeds will serve to design the equipment used in postharvest treatments.

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Physical and Mechanical Properties of Some Walnut (Juglans regia L.) Cultivars

Cited by 32 publications

References 0 publications

Comparison of Some Physico-Mechanical Nut and Kernel Properties of Two Walnut (Juglans regia L.) Cultivars

Comparison of Some Physico-Mechanical Nut and Kernel Properties of Two Walnut (Juglans regia L.) Cultivars

The Effects of Moisture Content, Compression Speeds, and Axes on Mechanical Properties of Walnut Cultivars

SOME ENGINEERING PROPERTIES OF SHELLED AND KERNEL TEA (Camellia sinensis) SEEDS

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