relative abundance


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relative abundance

A term defined in the context of mass spectrometry as the measured intensity of an ion beam at the designated m/z value.

Relative abundance refers to the practice of assigning to the most abundant ion in a measured and plotted mass spectrum a relative abundance of 100% and normalising all other ion abundances to that value. To be precise, ion beams are measured in intensity, and ions in abundance.
References in periodicals archive ?
Cyberlindnera and Geotrichum, a yeast and mold respectively, had high relative abundance in fresh elephant grass.
Because of time and personnel constraints, SERFS staff primarily evaluate videos for assessment of spatial distribution of reef fish species in the snapper-grouper complex and use a video-sampling method that involves viewing a subset of frames (number of frames [n]=41) from each video sample to calculate relative abundance (Bacheler et al., 2014; Schobernd et al., 2014).
The relative abundance of two plasma proteins, LG3BP and C163A, was measured using multiple reaction monitoring mass spectrometry.
The expected relative abundance of UMIDs per smMIP was estimated from the total UMID count per specimen and the expected abundance of UMID counts per smMIP as determined from 8 individuals typed during the rebalancing process (Fig.
"The microbes that increased in relative abundance in this walnut study are from one of the Clostridium clusters of microbes, and there's increased interest in those because they have the ability to make butyrate," Holscher said.
For this purpose, the historical database of relative abundance (RA) of microalgae and dinoflagellate cysts, both variables estimated according to the methodology described in this study, was considered.
Results: The result of lectin microarrays revealed that the relative abundance of the ([sz]-1,4)-linked N-acetyl-D-glucosamine (GlcNAc) recognized by lectin Datura stramonium agglutinin (DSA) was significantly higher in urinary protein in DN patients than that in NDRD patients (fold change >1.50, P < 0.001).
Among the other classes that were present, Gammaproteobacteria had a higher relative abundance in the maize sites and Bacilli had a higher relative abundance in the forest sites.
Proteobacteria was the dominant bacteria of all the water and soil samples, with the relative abundance all over the 35% in phyla.
In general, the abundances of Beijerinckia, Pelomonas, and Rhodoferax were similar in flood waters from both communities; however, the relative abundance of Curvibacter was slightly higher in vegetative stage.
Host and range analyses were completed to compare peculiarities of difference in species relative abundance between Louisiana coastal salt marshes and other coastal regions of the USA.
To assess specific changes in the gut microbiota, we compared the relative abundance of the predominant taxa identified from sequencing in the three diet groups (Figure 3).