Mahnaz Salehi; Ali Maghsoudi
Volume 20, Issue 1 , May 2018, , Pages 121-130
Abstract
This research was conducted in Animal Science Research Institute of Iran for determination of the effects of tanning method of ostrich skin on chemical characteristics of the leather. A total number of 12 pieces of ostrich hide prepared and each 4 skin pieces assigned to each of chrome, vegetable and ...
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This research was conducted in Animal Science Research Institute of Iran for determination of the effects of tanning method of ostrich skin on chemical characteristics of the leather. A total number of 12 pieces of ostrich hide prepared and each 4 skin pieces assigned to each of chrome, vegetable and alum tanning methods. Chemical characteristics of the leathers included fat content, water-soluble matter, water-soluble organic matter, sulphated water-insoluble ash, minerals, nitrogen, protein and pH were determined. Amount of fat in vegetable leathers was higher than chrome and alum leathers but water-soluble material, water-soluble organic material and sulphated water-insoluble ash in alum and vegetable leathers were same and higher than chrome leathers. In addition, higher amounts of nitrogen, protein and pH measured in chrome, alum and vegetable leathers, respectively. Six and four percent increase of fat and decrease in nitrogen, protein and pH in vegetable leathers is considerable compared with alum and chrome leathers. Significant positive correlation among fat with water soluble material, sulphated water-insoluble ash and negative correlation with nitrogen and protein in different leathers were achieved. There was higher correlation between mineral of the leather with all of the chemical characters other than pH. Due to some different chemical characters of the leather for vegetable tanning method practical evaluations are imperative using effective material and optimization of the method. Moreover, in spite of probable risks for the environment and tanning workers, the chrome method is the most appropriate method of ostrich skin tanning yet.
Sima Savar Sofla; Mahnaz Salehi
Volume 18, Issue 3 , October 2016, , Pages 635-646
Abstract
This was a study to investigate quantitative and qualitative characteristics of fiber extracted from crossbred goats derived from female hair goats indigenous of Qom and male Cashmere goats of South of Khorasan. From a total of 75 indigenous and cross goats aged 1-3, qualities such as the percentage ...
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This was a study to investigate quantitative and qualitative characteristics of fiber extracted from crossbred goats derived from female hair goats indigenous of Qom and male Cashmere goats of South of Khorasan. From a total of 75 indigenous and cross goats aged 1-3, qualities such as the percentage of cashmere in fleece, percentage of hair in fleece, hair staple length, cashmere staple length, cashmere fiber length, hair fiber length, and fiber diameter was investigated. Taking into account the effect of genetic group, sex and age characteristics, the data were analyzed with SAS software. The average fleece weight of goats was 300.2 ± 19.4 grams with a minimum of 99 and maximum of 713 grs. The length of hair fiber in the male goats fleece (12.8 ± 0.7 cm) was more than female ones (10.2 ± 0.5 cm); It was 12.0 ± 0 .6, 10.3 ± 0.4 and 12.2 ± 1.1 cm in indigenous goats, first and second generation cross goats respectively. The fleece weight in crossbred goats showed 21 grams increase compared to Qom indigenous goats; the difference was not statistically significant; While the percentage of cashmere in crossbred goats was almost twice as the indigenous goats (p<0.01). Based on the results, crossbreeding between the female hair goats of Qom and male cashmere goats of South of Khorasan improves the quality and quantity of extracted fiber.