Environmentally unstable

Summary. The figurehead has been allowed to disintegrate for an excessive period of time and is in danger of total structural failure. The present location of the object is environmentally unstable and unacceptable as an exhibition chamber. 

Hexavalent chromium Cr 0.1 Platings, especially for surface passivation of environmentally unstable metals, pigments, and plastics colorant as lead chromate hexavalent chromate finish for plated metal enclosures, fasteners, clips, and screws... 

In the closure of an open pit, confinement of the environmentally unstable material, such as pyrite or radioactive materials can be achieved by storage below the water table (Fig. 6). For example at the Wismut uranium mine in Germany radioactive and sulphide-rich waste is stored below the water table preventing extensive further breakdown. Above this is a buffer zone and low-level waste and a clay barrier which acts to reduce oxygen and water permeability and also absorb any radium emission (Chapman Hockley 1996 Hockley et al. 1997). 

Several devices incorporating P(ANi) as a dispersion in a polymer matrix have been described [908]. Several reflectance-mode devices incorporating CPs have also been described, some even including such environmentally unstable CPs as poly (acetylene) and reductively coloring ones such as poly(isothianaphthene) [909-911]. Nissan Motor Co. and several other manufacturers have described electrochromic devices capable of being incorporated into automobiles in rear view mirrors, displays, or windshields [912]. 

As long as conducting polymers remained nonprocessible or thermally or environmentally unstable, there was little hope for commercial applications other than in specialty areas. However, major improvements to the properties of conducting polymers have been recently obtained. For exaiTjple, it is now known that the presence of flexible substituents can provide solution or melt processibility without dramatically decreasing conductivities in the doped state. Also, a variety of conducting polymers is now known which are air stable and have reasonably high thermal stabilities. 

Perrv, S. G., Bums, D. J., Adams, L. A., Paine, R. J., Dennis, M. G., Mills, M. T., Strimaitis, D. G., Yamartino, R. J., and Insley, E. M., "User s Guide to the Complex Terrain Dispersion Model plus Algorithms for Unstable Conditions (CTDMPLUS)," Vol. I "Model Description and User Instructions," EPA/600/8-89/041, U.S. Environmental Protection Agency, Research Triangle Park, NC, 1989. 

Do not comply with the health and safety standards of your industry Do not comply with the relevant environmental regulations Do not have a system to assure the quality of supplies Are not committed to continuous improvement Are financially unstable... 

Skin is unstable to varying environmental conditions and deteriorates readily under humid conditions or through biological activity, or both. Basically, the decay of much ancient skin and hide results from hydrolysis, that is, the reaction of the protein fibers in the skin with water in extreme cases, the hydrolysis of skin and hide may cause their total dissolution, and quite often, under humid and hot environmental conditions, nothing remains to indicate that skin or hide was once there. 

An AOX-free alternative [316] is impregnation with 4 g/1 hydrogen peroxide, 8 g/1 urea and 2 g/1 nonionic wetting agent, then treatment for 60 minutes at 95 °C, pH 8 and 20 1 liquor ratio [316]. This results in a bleached fabric with excellent wettability and without serious fibre degradation. The urea interacts with hydrogen peroxide to form an unstable complex, which then decomposes to form hydroxyl and perhydroxyl radicals, according to Scheme 10.28 [316]. Urea exhibits undesirable environmental characteristics in some respects, however. 

In a recent analysis carried out for a bounded open system with a classically chaotic Hamiltonian, it has been argued that the weak form of the QCT is achieved by two parallel processes (B. Greenbaum et.al., ), explaining earlier numerical results (S. Habib et.al., 1998). First, the semiclassical approximation for quantum dynamics, which breaks down for classically chaotic systems due to overwhelming nonlocal interference, is recovered as the environmental interaction filters these effects. Second, the environmental noise restricts the foliation of the unstable manifold (the set of points which approach a hyperbolic point in reverse time) allowing the semiclassical wavefunction to track this modified classical geometry. 

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