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 ?
In DN patients, the relative abundance of the glycopatterns of ([sz]-1,4)-linked GlcNAc recognized by lectin DSA was higher than the others.
As regards the relative abundance of adult specimens in the trapped Norway rat (Fig.
Moreover, they studied the association of the relative abundance of groups of bacteria and smoking habits and found that certain bacteria had higher abundance in patients with CD and those with UC according to smoking habits.
More aroma-active compounds and higher relative abundances of sulfur and Maillard reaction volatiles were detected in UP milks than in HTST milks.
The abscissa (X-axis) represents the different gastrointestinal tract sections, and the ordinate (Y-axis) represents the average relative abundance of the bacterial phyla (n = 5 sheep).
The main objectives of our study were: (1) to conduct a comparative survey of mosquito larvae from selected habitats using standardized sampling methods to obtain pertinent data on the occurrence and relative abundance of indigenous Anopheles species, and (2) to identify the waxy body ornamentations or patterns of Anopheles (Anopheles) Hyrcanus Group larvae and pupae which may be useful for rapid field identifications during mosquito vector surveillance and control.
Where appropriate, the relative abundance of each classification was corrected for 16S ribosomal RNA operon copy numbers (9) using the NCBI taxonomy database (10) and the Ribosomal RNA Database project (RDP; release 10, update 32), and was expressed as percent corrected reads.
For clinical samples from children, decreased diversity was correlated with increased relative abundance of Malassezia, especially on sebaceous sites.
The data returned by OVIRS and OTES will actually allow scientists to make a map of the relative abundance of various materials across Bennu's surface.
The results are processed by different ecological indices of composition (occurrence frequency, relative abundance and density) and structure (Shannon-Weaver diversity indices and equitability).
In non-lens wearers, these bacteria were detected at a higher relative abundance in skin samples compared to the eye, suggesting that these bacteria could be classified as skin bacteria.
Scat surveys are inexpensive and noninvasive, while still providing information on relative abundance (Schauster et al.