September 1, 2014 Thesis Open Access

Dagnew Negasa

DCAT Export

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    <dct:title>ENHANCING UNIT VALUE REALIZATION OF HAIR SHEEP SKIN- AN ASSESSMENT OF CHANGES BETWEEN BUTT AND BELLY REGIONS AND ITS VALUE ADDITION USING COLLAGEN HYDROLYSATE</dct:title>
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    <dct:description>&lt;p&gt;Skin will undergo changes in biochemical and biophysical properties during leather processing.&lt;br&gt; Biochemical composition varies with respect to different regions of the skin like butt, belly,&lt;br&gt; and neck. Supported with the nature of structure and chemical constituents of the skin, leather&lt;br&gt; processing chemicals do have different propensity to different parts of the skin. Belly region&amp;rsquo;s&lt;br&gt; looseness and substance non-uniformity are the main problem in leather making from sheep&lt;br&gt; skin (SS) particularly for shoe upper. Having a back with the leather processing practice and&lt;br&gt; statistical data, an exuberant substance non-uniformity for sheep shoe upper is still recurrent in&lt;br&gt; our country&amp;rsquo;s context. To address same issue, this work focusses on the analysis of histology&lt;br&gt; and biochemical properties of butt and belly portion of hair sheep skin besides the investigation&lt;br&gt; of application collagen hydrolysate on the value addition of dyed crust leather and emission&lt;br&gt; load during pre-tanning.&lt;br&gt; Globular proteins are relatively higher in the butt region than the belly, whereas it is reverse in&lt;br&gt; the case of fibrous proteins except collagen. Interestingly, the presence of proteoglycans&lt;br&gt; content in butt regions is significantly high compared to belly and in case of fat it is reverse.&lt;br&gt; Thus, the effect of liming and bating operations in removing unwanted skin constituents is&lt;br&gt; stronger in butt and belly regions of SS, respectively, which reflects the requisite importance&lt;br&gt; of the two unit operations in the pre-tanning operations. ASC contribution is higher in butt&lt;br&gt; region than belly and the reverse is true in the case of PSC. The overall collagen content is&lt;br&gt; considerably higher in butt than belly which may be the major cause of the higher strength&lt;br&gt; characteristics of butt regions. Cr2O3&lt;/p&gt;</dct:description>
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