What does enrichment factor tell us?

What does enrichment factor tell us?

The enrichment factor (EF) is a widely used metric for determining how much the presence of an element in a sampling media has increased relative to average natural abundance because of human activity.

How do you calculate enrichment factor?

Comparison between areas affected by anthropogenic activities can be performed by calculating the enrichment factor EF = (M/N)sample/(M/N)baseline, which is the ratio between the concentrations of the metal (M) and those of the normalizer (N), both for the sample and for nearby non-polluted samples of a similar texture …

What is enrichment factor in analytical chemistry?

Enrichment factor (EF) is defined as the ratio of analyte concentration in the sedimented phase to the initial concentration in the aqueous phase as shown in equation: (1) EF = C sed C 0 where Csed and C0 are the analyte concentration in sedimented phase obtained from a suitable calibration graph and the initial …

What is enrichment factor in virtual screening?

Enrichment factor expresses the number of active compounds found by employing a certain virtual screening strategy. Conceptually the enrichment factor metric is simply the measure of how many more actives we find within a defined “early recognition” fraction of the ordered list relative to a random distribution.

What is enrichment ratio?

The enrichment ratio (ER), defined as the ratio of grade of a metal element in a deposit to the crustal abundance of the metal, is proposed for assessing mineral resources. According to the definition, the enrichment ratio of a polymetallic deposit is given as a sum of enrichment ratios of all metals.

What is enrichment factor heavy metals?

The Enrichment Factor (EF) in metals and Geoaccumulation Index (Igeo) (Eq. 1 and 2) are indicators used to assess the presence and intensity of anthropogenic contaminant deposition on surface soil.

What does enrichment value mean?

An enrichment p-value is calculated by comparing the observed frequency of an annotation term with the frequency expected by chance; individual terms beyond some cut-off (eg p-value ≤ 0.05) are deemed enriched[5]. This is a simple, useful and easy-to-use protocol.

What is dispersive liquid-liquid microextraction?

Dispersive liquid-liquid microextraction (DLLME) is an extraction technique developed within the last decade, which involves the dispersion of fine droplets of extraction solvent in an aqueous sample. Dairy products present a complex sample matrix and the removal of interfering matrix components can prove troublesome.

What is distribution factor in chemistry?

Distribution Ratio (in liquid-liquid distribution) (D) The ratio of the total analytical concentration of a solute in the extract (regardless of its chemical form) to its total analytical concentration in the other phase.

What is enrichment factor docking?

The enrichment factor is the concentration of the annotated ligands among the top-scoring docking hits compared to their concentration throughout the entire database.

What is ligand enrichment?

Ligand Enrichment is a common experiment used to evaluate how well a docking program is capable of accurately modeling in vitro experiments. This experiment uses active ligands and decoy ligands to access a docking programs ability to successfully dock to a target site.

What is gene ratio?

‘Gene ratio’ is the percentage of total DEGs in the given GO term (only input genes with at least one GO term annotation were included in the calculation).

How is the enrichment factor used in geology?

Enrichment factor. Enrichment Factor is used to describe bodies of mineral ore. It is defined as the minimum factor by which the weight percent of mineral in an orebody is greater than the average occurrence of that mineral in the Earth’s crust. It can be used to compare the necessary enrichment of different types of minerals for their recovery…

Which is the correct formula for the enrichment factor?

The Enrichment Factor is expressed as follow: (1) EF = (Metal/RE)soil/(Metal/RE)background Where, RE is the value of metal, adopted as Reference Element. The numerical results are indicative of different pollution level. Values of 0.5 ≤ EF ≤ 1.5 suggest that the trace metal concentration may come entirely from natural weathering processes [41].

How is the enrichment factor used in bioinformatics?

The enrichment factor can also be used to talk about the level of radioactive isotopes in Uranium, or the level of minerals in soil. The same concept is used in Bioinformatics for gene analysis, to measure the added value of a search tool over another one or over the homogeneous distribution in the genome population.

How does the enrichment factor change with temperature?

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.