Silicon fiber

FIGURE 5 Fiber structures left, knitted silicon fibers catalyst (6) right, woven carbon fibers (7). 

The temperature of extraction is limited by the temperature of destruction of the membrane fiber or by the temperature that allows a high solubility of water. In Ref. 28, an increase of the extraction yield with increasing temperature in the range between 10 and 50°C was observed due to the increase of the diffusion coefficients of analytes in the silicone fiber. Higher temperatures had a negative effect because higher amounts of water penetrated the membrane. 

J. Tretzel, H. Achtsnit, J. Bohler, M. Grimpel, H. Herwig, A. Wegerhoff, Production, Processing and Application of Enka Silicon Fibers, 57th Annual TRI Conference, Charlotte, NC, April 21-22, 1987. 

The use of low reaction chamber pressures (<1 bar) in the generic LCVD process yields large (>200 pm) diameter carbon fibers [8j with low growth rates (<10 pm/s) when a CO laser is used. Small (<20 pm) diameter carbon, boron and silicon fibers [1-2j [4j [7] are produced with equally low growth rates at <400 mbar when an efficient Ar laser is used. In summary, the low growth rates are due to the low pressure regime, and the fiber diameters are a function of the individual laser capability. 

Table II. Growth of High and Low Pressure LCVD Silicon Fibers [2] [4] [5] [14] [15]...

P. C. Nordine, S. de la Veaux and F. T. Wallenberger, Silicon fibers produced by high pressure laser assisted chemical vapor deposition. Applied Physics, A57,96-100 (1993). 

W. C. Harrigan Discontinuous silicon fiber mmcs. In T. J. Reinhart (editor) Composites, volume 1 of Engineered Materials Handbook, pages 889-895. asm International, 1987. 

Headspace membrane probe was made with a hollow silicone fiber and two pieces of 0.53 mm i.d. uncoated fused-silica capillary tubing Chromatographic column HP-5MS, 30 m X 0.25 i.d.,... 

The pillars may be removed from the particle in a two-stage process. In the first stage, the particles are washed several times in water and, if necessary, dried in a low vacuum system to remove the water. In the second stage, the particles are agitated in an ultrasonic bath to detach the pillars. These are suspended in water and then separated using a centrifuge to collect the silicon fibers. 

Nakano, A., Mild, N., Hishida, K., Hotta, A. Solution parameters for the fabrication of thinner silicone fibers by electrospinning. Phys. Rev. E Stat., Nonlin, Soft Matter Phys. 86, 011801 (2012)... 

Silicon carbide whisker-mediated transformation Silicon carbide aystals with a diameter of 0.6 tun and a length of 10-80 jun are mixed in liquid medium by vortexing in the presence of DNA and plant cells. The aystals pierce the cell walls and facihtate DNA transfer into plant cells (Kaeppler et al., 1990). This technique is considered to be one of the simplest techniques of DNA transfer to plant cells it is easy and quick but has a limited use due to low transformation efficiency, damage to cells that affects their regenerative capability, and the health hazards associated working with asbestos and silicon fibers. This technique has been successfully demonstrated in species such as maize, wheat, tobacco, etc. 

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