The phrase "amorphous silk" is correct and usable in written English.
It can be used in contexts discussing materials, textiles, or scientific descriptions where the properties of silk are being described as lacking a defined shape or structure.
Example: "The artist used amorphous silk to create a flowing, ethereal effect in her installation."
Alternatives: "shapeless silk" or "formless silk".
X-ray diffraction analysis revealed that amorphous silk fibroin in poly vinyl alcohol) methacrylate is crystallized to β-sheet secondary structure upon gelation.
The broad diffraction peak in this inset shows the scatter peak with 2θ values of 21.9° which is indicating typical amorphous scattering pattern of amorphous silk [29].
Finally, UV radiation causes a drastic reduction in the intensity of the tyrosine doublet band at wavenumbers of 835 and 850 cm−1 (Fig. 4e); this is a consequence of the photo-oxidation of the chromophoric tyrosine amino acids that are present in the amorphous silk regions [ 23].
The sponge-coated hybrid scaffolds were treated with 90/10 (v/v) methanol/water solution for 10 min to induce an amorphous to silk II conformational change in the microporous sponges to prevent resolubilization in cell culture medium.
Raman and IR spectroscopic analyses showed that upon grafting the fibres underwent slight conformational changes towards a more unordered state, due to the covalent and hydrogen bonds interactions occurring between the polymer (polyMAA) and the amorphous domains of silk fibres.
Firstly, some imino groups of RSD-NH2 form a silver ammonia complex with silver nanoparticles, which easily penetrate into the amorphous zone of silk fibers.
To test the collapse dynamics, highly stretched conformations of the two repetitive Cnidoin peptide units were subjected to force-quench simulations to monitor collapse dynamics in comparison to other disordered peptides, namely two silk amorphous peptides and two domain linker peptides in the von Willebrand Factor (vWF).
The coexistence of an alanine-rich motif (highly organized β-sheet crystalline domain) and a glycine-rich motif (amorphous matrix) in dragline silk renders a unique combination of high tensile strength and extensibility.
Additionally, the increased levels of nucleostemin and OCT4 expression in cells that were grown on silk-coated plates indicates that the amorphous cells that grew on flattened silk fibroin proteins remained undifferentiated.
These amorphous spacers in B. mori silk are tyrosine rich and also contain most of the other amino residues that are absent in the Gly-X domains, basically amino acids with bulky and polar side chains.
Time-resolved Fourier transform infrared (FTIR) spectroscopy is combined with dynamic mechanical measurements in order to unravel the interplay between the amorphous chains and nanocrystals in spider silk under conditions of selective swelling.
