Altuntas Ebubekir, Yildiz Merve
Department of Biosystem Engineering, Faculty of Agriculture, University of Gaziosmanpasa, Tokat-Turkey.
Afr J Tradit Complement Altern Med. 2017 Jun 5;14(4):39-45. doi: 10.21010/ajtcam.v14i4.5. eCollection 2017.
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 () seeds were determined in this study.
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.
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.
Some engineering properties, such as geometric mean diameter, sphericity, volume, bulk and true densities, the coefficient of friction, colour characteristics and rupture force of shelled and kernel tea () seeds will serve to design the equipment used in postharvest treatments.
茶叶是茶叶的来源，现在是一种在世界各地种植的经济作物。茶籽油在中国和其他亚洲国家用于烹饪已有一千多年的历史。茶是世界上除水之外消费最广泛的饮品。它主要产于亚洲、中非，并出口到世界各地。本研究测定了一些工程特性（尺寸大小、球形度、体积、堆积密度和真密度、摩擦系数、颜色特征以及带壳和去壳茶籽的机械性能如破裂力）。
本研究针对带壳和去壳茶籽展开。本研究中使用的带壳茶籽取自土耳其里泽市的东黑海茶叶合作机构。带壳和去壳茶籽按大小分为大、小两种规格。
带壳茶籽的平均几何平均直径和种子质量，大规格的为15.8毫米、10.7毫米；小规格的为1.47克、0.49克；而去壳茶籽的平均几何平均直径和种子质量，大规格的分别为11.8毫米、8毫米；小规格的分别为0.97克、0.31克。对于带壳和去壳茶籽样本，发现大规格的球形度、表面积和体积值比小规格的更高。带壳大规格茶籽的颜色强度（色度）在59.31至64.22之间，而去壳大规格茶籽的色度值分别在56.04至68.34之间。对于大规格茶籽，沿X轴去壳茶籽的破裂力值高于带壳茶籽；然而，对于大规格带壳茶籽，沿X轴的破裂力值高于Y轴。大、小规格带壳和去壳茶籽在橡胶表面的静摩擦系数比其他摩擦表面的值更高。
带壳和去壳茶籽的一些工程特性，如几何平均直径、球形度、体积、堆积密度和真密度、摩擦系数、颜色特征以及破裂力，将有助于设计收获后处理中使用的设备。
