نتایج جستجو برای: preformed particle gels
تعداد نتایج: 201024 فیلتر نتایج به سال:
Plasma fibronectin is covalently incorporated into alpha-chains of fibrin gels in the presence of Factor XIII activated by thrombin (FXIIIaT) but not by Factor XIII activated by the snake venom enzyme batroxobin (FXIIIaB). FXIIIaB catalyzes introduction of gamma-gamma cross-links in fibrin but cross-linked alpha-chains are not formed. In the presence of FXIIIaT, fibrin gels formed by batroxobin...
Hydrogel matrices are valuable platforms for neuronal tissue engineering. Orienting gel fibers to achieve a directed scaffold is important for effective functional neuronal regeneration. However, current methods are limited and require treatment of gels prior to implantation, ex-vivo, without taking into consideration the pathology in the injured site. We have developed a method to control gel ...
The heating of solid targets irradiated by 5 x 10(20) W cm(-2), 0.8 ps, 1.05 microm wavelength laser light is studied by x-ray spectroscopy of the K-shell emission from thin layers of Ni, Mo, and V. A surface layer is heated to approximately 5 keV with an axial temperature gradient of 0.6 microm scale length. Images of Ni Ly(alpha) show the hot region has <or=25 microm diameter. These data are ...
Different kinds of particle gels were simulated using a process of random aggregation of hard spheres. The mean square displacement of Brownian spherical tracer particles through these rigid gels was monitored and the average diffusion coefficient, normalized with the free diffusion coefficient (D), was obtained. For each gel structure the effect of the gel volume fraction (φ) and size ratio of...
Preformed plasma waveguides capable of controllably guiding relativistically intense femtosecond laser pulses over multiple Rayleigh lengths without optical distortion are essential to developing GeV-scale laser wakefield accelerators (LWFAs). We present recent experimental results showing guiding of pulses at intensities above 10 W/cm. Pump-probe experiments further characterize guided pulse p...
A large variety of engaging phenomena, ranging from crystallization in protein solutions to the formation of colloidal gels and glasses via depletion forces, stems from the occurrence of very short-ranged attractive forces. From depolarized light scattering measurements of equilibrium sedimentation profiles, we obtain an accurate description of the equation of state and of the phase diagram of ...
This paper is focused on the question of simulation and visualization of 3D gel and paste dynamic effects. In a first part, we introduce a 3D physically based particle (or mass-interaction) model, with a small number of masses and few powerful interaction parameters, which is able to generate the dynamic features of both gels and pastes. This model proves that the 3D mass-interaction method is ...
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