Films isolation

Among contaminants one of the most objectionable is oil, especially in systems where water is strongly heated. A relatively small amount of oil on a heating surface can produce very rapid failures. An indirect effect of oil, or other contaminants which form films on the water surface, is that the film isolates the water from air so that in polluted water anaerobic conditions may develop with the encouragement of objectionable bacterial activity. 

The positive effects of humic substances often occur when the plants are grown in nutrient solution under anexic conditions in thin film isolators. This shows that the beneficial effects are due to the humic substances per se, rather than being mediated by microbial breakdown products. 

Fig. 1 Flexible-film isolator with half-suit used for sterility testing. (Diagram courtesy of La Calhene.)...

ACDP UK, Guidance on the Use, Testing, and Maintenance of Laboratory and Animal Flexible Film Isolators, Dec. 1995. Qean Rooms and Associated Controlled Environments. A family of new standards produced by ISO and CEN. EN/ISO 14644-1-14644-8 (Progressive Publication from May 1999). Refer to ISO 10648. In Containment Enclosures—Part 1 Design Principles 1997. 

Diffusion barrier layers are an integral part of the fabrication of copper interconnects (Figs. 3 and 4). Barrier films isolate (encapsulate) Cu interconnects from adjacent dielectric materials. The diffusion barriers most studied to date are Ti, and TiN. ... 

TABLE 1 Physico chemical charactedstics of solutions of the CUT specimen used Isolutions obtained from initial CHT powder, 2solutions obtained from the film isolated from 1% acetic acid. 

The various cabinet systems described above were all of rigid construction. Experience shows that rigid cabinets offer many advantages they are robust, can support heavy items of equipment and peripherals such as pass boxes and interface panels. However, it is practical to consider the use of plastic film isolator technology as an alternative approach to providing physical encapsulation. ... 

In this paper the two approaches are applied to experimental data from a recently-constructed squeeze-film isolator. Some typical results are presented and their significance is discussed. 

For this study, the mathematical model of the squeeze-film Isolator is assumed to take the form (Burrows and Stanway (4)) ... 

In this paper the authors have presented a comparison of time and frequency domain algorithms for estimating the four linearised damping coefficients associated with a squeeze-film isolator. 

The protection action of inhibitor substances during metal corrosion is based on the adsorption ability of their molecule where the resulting adsorption film isolates the metal surface from the corrosive medium Consequently, in inhibited solutions, the corrosion rate is indicative of the number of the free corrosion sites remaining after some sites have been blocked by inhibitor adsorption. 

Basically, corrosion of reinforcement is due to the breakdown of its passive layer which is composed of an insoluble thin oxide film. This film isolates the reinforcement from the aggressive environment. The films which grow on the reinforcement are either Fe (ferrous) or Fe " " (ferric), both being stable in the absence of carbonate. The Fe (ferric) film is generally more stable than the ferrous film (Fe " "). These films are formed by the following reaction ... 

LONGLAND J.E. 1973. An investigation into techniques for the growth of plants under axenic conditions using a thin-film isolator. Degree Dissertation, Trent Polytechnic, Nottingham, U.K. 

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