Röntgenkleinwinkeluntersuchungen zur Frage einer geordneten Matrix in α-Keratin

Spei, M.

doi:10.1007/bf01507605

Cited by 17 publications

(11 citation statements)

References 18 publications

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“…Mohairfasern, die 24 h bei 20 ~ mit TFE behandelt worden waren, ergaben R6ntgen-diagramme, in denen 1968 erstmals der bereits 1943 vorausgesagte [21,22] axiale 198 ~k Reflex beobachtet wurde [23]. Nach der Dehnung von Mohairfasern in TFE wurden drei verschiedene Arten yon Meridianreflexen beobachtet, was zur Postulierung des ,,Aachener Matrixmodells" ftihrte [6,24].…”

Section: Rsntgenkleinwinkeluntersuchungen Von 15sungsmittelbehandelteunclassified

R�ntgenographische Untersuchungen des Mikrofibrillen-Matrix-Komplexes von?-Keratinen mit unterschiedlichem Matrixgehalt

Spei

1982

Colloid & Polymer Sci

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Summary: Low-angle X-ray diffraction is a powerful means of investigating the microfibril-matrix-complex of a-keratins. Former X-ray investigations of swollen keratins with different matrix contents have been interpreted in terms of a preferential microfibrillar swelling. In order to consider also the chemically bound water our X-ray investigations of swollen keratins have now been extended on Dnp-keratins. The hereby obtained results have been discussed after comparison with the former results. Furthermore the deposition of Na-decylsulfate in ,,exotic" a-keratins with unusual matrix compositions has been studied. Finally it has been shown that fluorinated alcohols -trifluoroethanol and hexafluoroisopropanol -react as well with the matrix proteins as with the microfibrillar proteins.SchliisselwSrter: RSntgenkleinwinkeluntersuchungen, Mikrofibrillen-Matrix-Verbundstruktur, Quellenstudien in Wasser, Tensideinlagerungen, fluorierte Alkohole.

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Section: Rsntgenkleinwinkeluntersuchungen Von 15sungsmittelbehandelteunclassified

R�ntgenographische Untersuchungen des Mikrofibrillen-Matrix-Komplexes von?-Keratinen mit unterschiedlichem Matrixgehalt

Spei

1982

Colloid & Polymer Sci

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“…Rfntgenkleinwinkeluntersuchungen an tensidbehandelten, nitrierten und gedehnten Faserkeratinen haben gezeigt, dab nicht alle axialen Kleinwinkelreflexe als hfhere Ordnungen einer einzigen Grundperiodizit~it indiziert werden diirfen, sondern dab entlang der Faserachse mehrere geordnete I3ereiche existieren (1,2). t3esonders aufschluBreich waren die Untersuchungen yon in Trifluodithanol gedehnten Mohairfasern.…”

Section: Introductionunclassified

Röntgenkleinwinkeluntersuchungen an reduzierten und reduziert-gedehnten Faserkeratinen

Spei

Meichelbeck

1976

Colloid Polymer Sci

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“…First the 28 A reflexion is intensified, and then at lower pH-values, the 39 A reflexion. These results have been interpreted in terms of two ordered regions along the fibre axis: The 28 A reflexion has been indexed as a matrix repeat and the 39 reflexion as a microfibrillar repeat [1][2][3][4]. Very recently a similar two stage mechanism of the detergent position has been observed depending only on the reaction time (cf.…”

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confidence: 96%

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Mohair fibres which have been treated with a 0.03 N Na-decylsulphate solution (c.m.c=0.032 mole/l) at 20 ~ for 18 h at pH 2, sucked off and dried, exhibit low-angle X-ray patterns with considerably intensified meridional reflexions at 28 A and 39 A [1][2][3][4]. When the mohair fibres were treated at higher pH values it was found that the deposition of the detergent molecules occurs in two stages.

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confidence: 99%