Cork particles

Cork [61789-98-8] is an effective low cost charring ablator. In order to reduce moisture absorption and related poor performance, cork particles are often blended in a silicone or phenoHc resin. The result is a uniform ablative material in a sheet form that is easy to apply. 

Natural cork is the closure preferred by most producers of medium- to high-priced sparkling wine. The dimensions of corks are 31 mm in diameter and 48 mm in height. The upper part of the cork is composed of cork particles, 2-6 mm in size, bonded together with a polypropylene resin. There are two or three whole cork disks, 6 mm thick, bonded to the bottom of the... 

An alternative to dielectrophoretic or magnetic force manipulation of microparticles in suspension is the use of acoustic standing wave forces, which also have served as the basis for particle and cell manipulation in microfluidic devices. Historical work by Kundt demonstrated early on the ability to move cork particles in a standing wave pattern. The fundamental acousto-physical principles have been well researched and described in the literature by King and Gorkov. ... 

Gas-injection molding n. A specialized technique for molding low-density structures in which a mixture containing cork particles, or glass or phenolic microspheres, glass fibers, and a thermosetting resin is injected into a mold by fluidizing it in a gas stream. 

A man aged 54 years, who was exposed to cork dust for about 14 years, showed intraalveolar giant cells loaded with coal and cork particles. Some had asteroid bodies in their cytoplasm (Remmele and... 

Breault RW, Ludlow CJ, Yue PC Cluster particle number and granular temperature for cork particles at the wall in the riser of a CFB, Powder Technol 149 68-77, 2005. 

Fitzgerald and Crane (1980) were among of the first to evaluate the full set of hydrodynamic scaling parameters. They compared the hydrodynamics of two scaled beds using pressure fluctuation measurements and movies. In one bed cork particles were fluidized with air the other bed used sand fluidized with pressurized refrigerant 12 vapor. Movies showed qualitative agreement between bubble growth and the solids flow in the beds. 

This short paper describes a demonstration suitable for use in the classroom. Two populations of corks are sampled to determine the concentration of labeled corks. The exercise demonstrates how increasing the number of particles sampled improves the standard deviation due to sampling. 

These materials are designed to reduce water from condensation dripping on equipment, etc. They often incorporate particles of cork so that water is absorbed. They are generally thick films to provide some insulation and have a rough textured surface finish to increase the surface area and encourage water evaporation. In general, physical methods of prevention such as adequate ventilation, etc. are more effective. 

Sephadex G-50 has been prepared for your use. The dry beads have been preswollen in water for several hours, fine particles that may slow column flow have been removed, and the gel has been equilibrated in Tris buffer. If chromatography columns are not available, one can easily be constructed from a glass tube (2.5 X 40 cm), cork stoppers, Tygon tubing, a screw clamp, and small glass tubing as shown in Figure E4.4. With the screw clamp closed, add 10 to 15 mL of Tris buffer and insert a small piece of... 

Douglas fir bark is a ligno-cellulosic material, too, containing up to 20 percent cork, 20 percent amorphous tannin powders and 5 percent vegetable wax (carnauba type). As previously mentioned, the wax is extracted before use as an extender. The balance is dried and ground into powder form similar to particle size of furafil before use as an extender. Alder bark is dried and ground directly without further treatment and used as a filler. 

Over the years, many types of such controlled-release formulations have been evaluated, such as cotton wicks, rubber septa, polyethylene in various forms, cigarette filters, plastic tablets, cork, wax, molecular sieve, etc. (2). In recent years, commercial production of controlled-release formulations has provided an economical and reproducible source of pheromone dispensers and small particles for aerial dispersion. At the present time, many of the insect pheromone programs involving commercially produced, controlled-release products use one of the formulations listed in Table I. 

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