Depletion factor

Year Capex Ann. prod. Reserves Depletion factor Un rac d Assets Capital allowance... 

The solvent, if a blend, should not contain any Class I or Class II ozone-depleting substances as listed in Title VI of the Clean Air Act (Sect. 602) or any chemical with an ozone-depletion factor of 0.2 or greater (CFC 11 = 1). 

We note that fission product activity balance requires that the specific activity of a volatile chain increase more rapidly than a refractory chain with decreasing diameter because of the large depletion factors noted in 89Sr/144Ce in large sizes. 

Fig. 3 Typical breakthrough curve for toluene Fig. 4 Specific depletion factor (per layer) as...

Depletion factor (raw gas concentration/clean gas concentration), working capacity (mass-related loading as a percentage for each test taking into account the residual loading present after the previous test) and the adsorption time before breakthrough (set at 10% of the raw gas concentration value) were considered as important parameters for evaluating the measurement... 

Figure 6 Elemental abundance patterns for trapped noble gases in various planetary materials. For each gas identified on the abscissa, the ordinate shows the depletion factor in a given sample, i.e., the gas concentration in the sample divided by what the concentration would be if the gas were present in undepleted cosmic proportion (normalized for a nominal rock with 17% Si). The relative elemental abundances in the left panel illustrate the solar pattern, those in the right panel the planetary pattern. The vertical broken lines for each gas illustrate typical in situ gas concentrations (the radiogenic component for " He, spallation for the others), below which it becomes progressively more difficult to characterize or even identify trapped components (source Ozima and Podosek, 2002).

Figure 7 Siderophile element concentrations in averaged medium-Ti mare and terrestrial basalts, normalized to Cl chondrites. The elements are plotted in order of Cl-depletion factors in average medium-Ti mare basalt, but for some elements volatility may account in large part for the depletion. Data are from same sources as for Figure 6. To avoid an over-complex diagram, individual terrestrial compositions are not plotted, but all show similar patterns at the scale of this diagram the most noteworthy exceptions being low iridium (9 X 10 times Cl) and nickel (10 times Cl) in BCR-1, and relatively low osmium and iridium (virtually identical to mare basalts) and antimony (0.11 times Cl)...

In Pinsonneault et al. (2002) we adopted for our baseline (Spite Plateau) estimate [Li]= 2.2 0.1 for an overall depletion factor we chose 0.2 0.1 dex. Combining these linearly, we derived an estimate of the primordial lithium abundance of [Li]p = 2.4 0.2. I will use this in the comparison between theory and observation to be addressed next. 

There Is no evidence from the data In Table I that the polymerization rate, as measured by the (-M) value, decreases by more than the monomer depletion factor with Increasing percent conversion. On the contrary, the three highest conversions show above-average overall rates which may Indicate that the reaction proceeds with a modest acceleration In rate as the retarders are used up or become... 

FIGURE 2.12 Depletion factors for siderophile elements in the Earth s mantle and the Moon relative to Cl chondrite, using the median Earth and Moon values from the compilation of Kramers (1998) (see Text Box 2.2). 

This method is based on the usage of the resource each year, starting with an estimate of the amount of resource that can be removed (recovered) and its cost. Since it may be difficult to make an initial estimate of the amount of recoverable resource, the estimate can be revised at a later date. To use this method, a cost depletion factor, p for the year t is defined... 

For instance, to bring an n-type detector to the limit of Auger process suppression, electron concentration must be either equal to the product of nonequilibrium depletion factor and intrinsic concentration or lower than it (if the Shockley-Read noise component can be neglected). Thus, the product between the nonequilibrium depletion factor and intrinsic concentration represents the highest allowed level of doping of a given semiconductor for a given temperature. 

Fig. 3.1 Dependence of nonequilibrium depletion factor on cutoff wavelength for mercury cadmium telluride detector. Solid lines (numbers without prime) radiative lifetime calculated without reabsorption. Dashed lines (primed numbers) ninefold increase of lifetime due to reabsorption. Curve 1 300 K, curve 2 220 K, curve 3 180 K, curve 4 77 K...

Harris, R.B. and R.J.Martin, 1986. Melabolic response to a specific lipid-depleting factor in parabiotic rats. Am J Physiol 250, R276-286. 

Even though the CFC materials will be around for a number of years in recycled form, there are a number of non-CFC-containing solvent systems that are being used or are under consideration as alternatives to CFC cleaners. One desirable aspect of using CFC solvents is their non-corrosive nature. Many of the proposed replacements for the CFCs are much more aggressive. An interim replacement for the CFCs could be the HCFCs, which have a lower ozone depletion factor, but these will also be phased out in the near future. Information on CFC replacements can be obtained from the EPA s Ozone Information Hotline (see www.epa.gov). 

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