The results discussed in the preceding paper (Levine, R. J. C., J. L. Woodhead, and H. A. King. 1991. J. Cell Biol. 113:563-572.) indicate that A-band shortening in Limulus muscle is a thick filament response to activation that occurs largely by fragmentation of filament ends. To assess the effect of biochemical changes directly associated with activation on the length and structure of thick fi...

Abstract As intense, ultrashort, kHz-repetition-rate laser systems become commercially available, pulse cumulative effects are critical for filament-based applications. In this work, the repetition-rate effect on femtosecond filamentation in air was investigated both numerically and experimentally. The has negligible influence at leading edge of filament. Clear intensity enhancement from a high...

Abstract Further innovation in the field of selective laser sintering (SLS) is strongly connected to availability new materials since market dominated by polyamide 12 (>90%). The aim this publication develop a descriptive model for droplet formation process Filament Extension Atomizer predict applicability exploit further polymers SLS process. feasibility was tested, investigated and charact...

In the California Current System, cross-shore transport of upwelled, nutrient-rich waters from coastal margin to open ocean can occur within intermittent, submesoscale-to-mesoscale features such as filaments. Time-varying spatial gradients filaments affect net fluxes physical, biological, and chemical tracers but require high-resolution measurements accurately estimate. June 2017, Ecosystem Lon...

The properties of full-length and mutant peripherins were studied in intermediate filament-less SW13 cells to define regions of peripherin that are essential for initiation of filament assembly. A full-length rat peripherin gene transfected into SW13 cells resulted in filament formation, consistent with the close structural relationship of peripherin to other type III intermediate filament prot...

We used developing human hair follicle cells for the isolation of hard alpha-keratin structural components. Intracellular dispersions examined by electron microscopy contained both individual alpha-keratin filaments and the tactoid-like filament assemblies observed in situ organized along subfibrillar arms of macrofibrils. The assemblies of average width 47 nm were composed of closely packed al...

The first polarimetric images of the OMC-3 region of the Orion A filamentary molecular cloud are presented. Using the new imaging polarimeter on SCUBA at the James Clerk Maxwell Telescope, we have detected polarized thermal emission at 850 μm from dust along a 6 length of the dense filament. The polarization pattern is highly ordered and is aligned with the long axis of the filament throughout ...

Human SW-13 cells express the intermediate filament protein vimentin in a mosaic pattern (Hedberg, K. K. and Chen, L. B. (1986). Exp. Cell Res. 163, 509-517). We have isolated SW-13 clones that do (vim+) or do not (vim-) synthesize vimentin as analyzed using anti-intermediate filament immunofluorescence, electron microscopy and two-dimensional gel analysis of detergent-extracted preparations. V...

In the presence of adenosine triphosphate, molecular motors generate active force dipoles that drive suspensions of protein filaments far from thermodynamic equilibrium, leading to exotic dynamics and pattern formation. Microscopic modeling can help to quantify the relationship between individual motors plus filaments to organization and dynamics on molecular and supramolecular length scales. H...

The transition-Cherenkov terahertz (THz) radiation from a femtosecond laser filament in air is enhanced by 3 orders of magnitude in the presence of a longitudinal static electric field, while the radiation pattern and the polarization remain the same. An amplified longitudinal electron current inside the filament is responsible for this amplified THz emission. A plasma filament formed in air by...