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Digitale Medien

Gewinnung und Charakterisierung von nichtkeratinarmer Wolle — ein Modellpräparat für die Grundlagenerforschung von textilchemischen Ausrüstungsprozessen (1985)

Klotz, M. -L. ; Klotz, G. ; Zahn, H.

Springer

Colloid & polymer science 263 (1985), S. 654-659

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ISSN: 1435-1536

Schlagwort(e): 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

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Maschinenbau

Notizen: 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.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01419890

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Digitale Medien

Oligomers and Pleionomers of Synthetic Fiber-Forming Polymers (1963)

Zahn, H. ; Gleitsman, G. B.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 2 (1963), S. 410-420

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ISSN: 0570-0833

Schlagwort(e): Oligomers ; Pleionomers ; Polymers ; Fibers ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The term “oligomer” is defined, and a survey of methods for the isolation and synthesis of cyclic and linear oligoesters, oligourethanes, oligo(acrylonitriles), and oligoamides is presented. The oligomers serve a valuable function as model substances for the investigation of many properties of the corresponding high polymers. This is shown using several examples (infrared spectroscopy, X-ray spectroscopy, viscosity).

Zusätzliches Material: 1 Ill.