Mahnaz Salehi; Ali Maghsoudi
Volume 18, Issue 3 , October 2016, , Pages 625-633
Abstract
The aim of the present study was to investigate the physicochemical performances at three sites on skin, namely the diagonal, neck and leg based on different age groups. Eighteen skins pieces in 6 m, 6 m to 1 yr and 1 yr to 1.5 yr of age were selected to represent means of the respective age groups with ...
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The aim of the present study was to investigate the physicochemical performances at three sites on skin, namely the diagonal, neck and leg based on different age groups. Eighteen skins pieces in 6 m, 6 m to 1 yr and 1 yr to 1.5 yr of age were selected to represent means of the respective age groups with regard to skin area. The skin area were7.4±1.41, 13.5±1.4 and 18.2±1.1 ft2 for the ostriches, respectively. The diagonal region, neck and leg parts were approximately 81.5, 10.1 and 8.4 percent of the skin area. The areas increased with an increased chronological age at all sites. Average skin area increased at a rate of 0.9 ft2 per each months of age. Average and range of thickness of the leather were 1.5±0.1 (0.6 to 3.0) mm, breaking load 22.2±3.3 (4.9 to 49.2) kgf, tensile strength 146.3±17.1 (70.5 to 269.7) kgf/cm2, percentage extension 58.7±4.9 (21.5 to 93.3) % and density were 0.6±0.05 (0.4 to 0.9) g/cm2. It was evident that leather thickness increased with age. A similar tendency was observed for tensile strength (P<0.01). Tensile strength from diagonal, neck and leg parts of the body were 129.0±26.3, 123.4±33.2 and 131.7±41.7 kgf/cm2 respectively which was statistically different (P<0.05). The overall means of ostrich leather for fat, water soluble material, organic soluble materials, non-soluble sulphate ash, minerals, nitrogen, protein and pH were 16.1±1.4, 1.5±0.6, 0.8±0.2, 0.8±0.3, 0.5±0.1, 9.6±0.3, 59.8±1.9 and 3.6±0.1 % resectivelly. The leather from legs had more water soluble material, organic soluble materials, non-soluble sulphate ash and minerals (P<0.05) compared to other regions of body. The amounts of fat in leather of ostrich with 6 month of age in diagonal region, was higher than older ostrich and the other regions of body (P<0.05). Nitrogen and protein was higher in >12 months of age (P<0.05) than the younger ostrich. It does, however, exert an important influence on the quality traits that were considered, and needs to be considered in the marketing of ostrich leather.
Mahnaz Salehi; Jaleh Mirabdolbaghi; Mohammad Ali Kamali Sarvestani
Volume 14, Issue 1 , September 2012, , Pages 11-17
Abstract
The study was consequently investigated effect of different tanning methods on apparent density, thickness, tensile strength and also extension percentage in three different tanning (chromic, alum and vegetable) of grown part of ostrich skins (n = 15; 12 to 14 months). Average apparent density and thickness ...
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The study was consequently investigated effect of different tanning methods on apparent density, thickness, tensile strength and also extension percentage in three different tanning (chromic, alum and vegetable) of grown part of ostrich skins (n = 15; 12 to 14 months). Average apparent density and thickness of leathers were 0.7 ± 0.0gr/cm2 and 1.7 ± 0.1 mm, respectively. The breaking load, tensile strength and extension of chromic tanning leather (33.0 ± 4.9 kgf, 197.2 ± 23.9 kgf/cm2 and 53.3 ± 7.0 percent) were more than alum tanning leather (27.4 ± 5.5 kgf, 161.7 ± 26.7 kgf/cm2, 46.4 ± 7.8 percent) and vegetable tanning leathers (13.0 ± 4.5 kgf, 70.7 ± 21.8 kgf/cm2 and 40.1 ± 6.4 percent). However, the best physical quality was found in the chromic tanned leather for ostrich skin proccesing related to alum and vegetable leathers.