September 1, 2014 Thesis Open Access

Dagnew Negasa

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{
  "DOI": "10.20372/nadre:4486", 
  "author": [
    {
      "family": "Dagnew Negasa"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2014, 
        9, 
        1
      ]
    ]
  }, 
  "abstract": "<p>Skin will undergo changes in biochemical and biophysical properties during leather processing.<br>\nBiochemical composition varies with respect to different regions of the skin like butt, belly,<br>\nand neck. Supported with the nature of structure and chemical constituents of the skin, leather<br>\nprocessing chemicals do have different propensity to different parts of the skin. Belly region&rsquo;s<br>\nlooseness and substance non-uniformity are the main problem in leather making from sheep<br>\nskin (SS) particularly for shoe upper. Having a back with the leather processing practice and<br>\nstatistical data, an exuberant substance non-uniformity for sheep shoe upper is still recurrent in<br>\nour country&rsquo;s context. To address same issue, this work focusses on the analysis of histology<br>\nand biochemical properties of butt and belly portion of hair sheep skin besides the investigation<br>\nof application collagen hydrolysate on the value addition of dyed crust leather and emission<br>\nload during pre-tanning.<br>\nGlobular proteins are relatively higher in the butt region than the belly, whereas it is reverse in<br>\nthe case of fibrous proteins except collagen. Interestingly, the presence of proteoglycans<br>\ncontent in butt regions is significantly high compared to belly and in case of fat it is reverse.<br>\nThus, the effect of liming and bating operations in removing unwanted skin constituents is<br>\nstronger in butt and belly regions of SS, respectively, which reflects the requisite importance<br>\nof the two unit operations in the pre-tanning operations. ASC contribution is higher in butt<br>\nregion than belly and the reverse is true in the case of PSC. The overall collagen content is<br>\nconsiderably higher in butt than belly which may be the major cause of the higher strength<br>\ncharacteristics of butt regions. Cr2O3</p>", 
  "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", 
  "type": "thesis", 
  "id": "4486"
}