enrichment factor


Also found in: Acronyms.

enrichment factor

[in′rich·mənt ‚fak·tər]
(nucleonics)
The ratio of the abundance of a particular isotope in an enriched material to its abundance in the original material.
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The isotope enrichment factor calculated using the Rayleigh formula for dissimilatory denitrification in the topsoil layer columns was -7.60 [+ or -] 1.28 [per thousand] (n=3) and for subsoil -34.91 [+ or -] 1.77[per thousand] (n=3).
With increasing the feed temperature, the total permeation flux of the A-PDMS, G-PDMS, and M-PDMS membranes all increase, while the enrichment factor all decrease.
Overall, the chemical-based enrichment factor and the grey relational analysis both showed that the soil source region of number 13 ADS event was highly likely emitted from the central Inner Mongolia.
The amount of anthropogenically introduced metal in household dust of different study locations was estimated using an enrichment factor (EFx).
Enrichment factors with respect to average values of shales for the Himmetoglu, Hatildag, Beypazari, Seyitomer, Bahcecik and Golpazari oil shales Field Name Enrichment Factor Re Mo U Himmetoglu 39.5 3.57 12.45 Hatildag 158.17 15.67 3.07 Beypazari 310.00 107.00 12.45 Seyitomer 67.50 9.07 3.33 Bahcecik 35.17 1.57 0.95 Golpazari 106.67 14.53 3.64 Average values of shales for Re, Mo, U and Al are 0.5 ng/g [27], 2.6, 3.7 ([micro]g/g) [33] and 8.8% [34], respectively.
In B2B cells, up-regulated genes were significantly overrepresented in the GO categories response to chemical stimulus (enrichment factor, 3.19; p < 0.001), response to unfolded protein (enrichment factor, 7.69; p = 0.006), transition metal ion binding (enrichment factor, 2.55; p = 0.003), interleukin-6 receptor binding (enrichment factor, 40; p < 0.001), plasminogen activator activity (enrichment factor, 28.57; p = 0.002), and UDP-glycosyltransferase activity (enrichment factor, 13.33; p = 0.008).
In this case, the average enrichment factor was 0.7 for smectite, 1.8 for palygorskite, and 0-9 for kaolinite (Table 7).
The increase in stirrer speed did not affect either the flux or the enrichment factor significantly.
The enrichment factor (EF) of elements has been commonly used as a first step to evaluate their enrichment degree and the relative contribution of crustal and non-crustal sources [4, 8, 29, 30].
Under the optimum experimental conditions, the detection limit of this method for Hg2+ was 5.0 ng L-1, with an enrichment factor of 15.0, and the relative standard deviation was 3.5% at the 1.0 g L-1 Hg2+ level.