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  • (α + ε)-aminogroups  (1)
  • atomic absorption spectrophotometry  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Gewinnung und Charakterisierung von nichtkeratinarmer Wolle — ein Modellpräparat für die Grundlagenerforschung von textilchemischen Ausrüstungsprozessen (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 654-659 
    Details
    ISSN: 1435-1536
    Keywords: Wool ; nonkeratinous proteins ; enzymatic hydrolysis ; pronaseE ; extent of digestion ; (α + ε)-aminogroups ; microbial investigations ; fractionating of the keratoses ; internal volume ; mercury porosimetry ; centrifugal swelling test
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The nonkeratinous proteins of wool can be partly or completely dissolved by controlled enzymatic digestion. A comparison between the keratose content of intact wool and that of wool which has been hydrolysed for 96 h with pronase confirms that specifically all the nonkeratinous components are dissolved out of the wool composite by pronase. The influence of microbial infection can be excluded. The residue of wool after the hydrolysis, i. e., a wool low in nonkeratinous proteins, has a higher internal volume, as measured by mercury porosimetry. The centrifugal swelling test shows that these wool samples also have increased hygroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419890
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  • 2
    Electronic Resource
    Electronic Resource
    Histochemical localization of high-sulfur keratins with silver nitrate (1983)
    Springer
    Colloid & polymer science 261 (1983), S. 365-369 
    Details
    ISSN: 1435-1536
    Keywords: wool ; electron-microscopy ; silver staining ; atomic absorption spectrophotometry ; silver content
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The treatment of merino wool with ammoniacal silver nitrate results in a selective staining of high-sulfur proteins. The method has been applied to unmodified and reduced fibres. The electron microscopical studies are supplemented by a quantitative analysis by means of atomic absorption spectrophotometry. At the saturation point no difference in the silver uptake of reduced and unreduced fibres can be established. However, the samples show considerable differences regarding the kinetics of the reaction. The photometric analysis yields a silver uptake of 3 mol Ag/mol cysteine and 6 mol Ag/mol cystine. The silver deposition depends upon the formation of silver mercaptide and silver complexes of unknown structure. In comparison with cysteine the mercaptide formation from cystine occurs very slowly, because the disulfide bond first has to be cleaved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413944
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