The design principles of spider dragline silk, nature's high-performance fiber, are still largely unknown, in particular for the noncrystalline glycine-rich domains, which form the bulk of the material. Here we apply two-dimensional solid-state NMR to determine the distribution of the backbone torsion angles (phi,psi) as well as the orientation of the polypeptide backbone toward the fiber at bo...

Motion measurements obtained from a maneuvering 1/16-scale dragline excavation system using a six camera motion capture system are compared against motion predictions of the same scenario using a complex dragline excavation system simulation. The dynamic model includes motion of the bucket, spreader bar, hoist cluster, and drag cluster, along with flexible rope and chain segments including the ...

Contrary to expectation, we demonstrate that spider dragline silk spun experimentally under water displays greater stiffness and higher resilience compared to silk spun "naturally" into air. We suggest that this consequence of extended wet-spinning is due to increased molecular orientation resulting from extension of the mobile phase.

BACKGROUND In the field of Plastic Reconstructive Surgery the development of new innovative matrices for skin repair is in urgent need. The ideal biomaterial should promote attachment, proliferation and growth of cells. Additionally, it should degrade in an appropriate time period without releasing harmful substances, but not exert a pathological immune response. Spider dragline silk from Nephi...

Spider dragline silk is Nature’s high-performance fiber that outperforms the best man-made materials by displaying extraordinary mechanical properties. In addition, spider silk is biocompatible and biodegradable, which makes it suitable as a model for biomaterial production. Dragline silk consists of large structural proteins (spidroins) comprising an extensive region of poly-alanine/glycine-ri...

Purpose. To substantiate a rational schedule for the combined dragline-truck operation taking into consideration coefficient of mining in context pit. Methodology. Mathematical and graphical modeling was involved while determining concentration pit as well feasibility analysis to select procedure scheme dragline operation. Findings. Recommendations selection operation, truck loading Motronivsko...

Rising, A. 2007. Spider dragline silk – molecular properties and recombinant production. Doctor’s dissertation. ISSN: 1652-6880, ISBN: 978-91-576-7337-4 Spider dragline silk possesses several desirable features of a biomaterial; it has extraordinary mechanical properties, is biocompatible and biodegradable. It consists of large proteins, major ampullate spidroins (MaSp:s), that contain alternat...