natural abundance

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natural abundance

[′nach·rəl ə′bən·dəns]
(nucleonics)
The abundance ratio of an isotope in a naturally occurring terrestrial sample of an element.
References in periodicals archive ?
Associate Professor of Medicine at University of North Carolina at Chapel Hill, RP-G28 modified the relative abundance of 28 bacterial species.
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.
At baseline, microbiome samples of facial and retroauricular skin among the controls with no acne showed that Streptococcus "was the genus present in highest relative abundance, followed by Propionibacterium," the authors wrote.
A high relative abundance of Mycoplasma species was detected in all samples based on 16S rRNA sequencing.
Commensal rodents, Urban environment, Reproductive patterns, Relative abundance.
They reported the lower relative abundance of Faecalibacterium as a butyrate-producing beneficial microorganism in patients with CD and also showed that this genus is not missing in patients with UC, thus making it a useful marker to discriminate patients with CD from those with UC.
Many aroma-active compounds decreased in relative abundance in stored milks.
Data are limited on the collections and habitats for the occurrence and relative abundance of indigenous Anopheles mosquitoes in the ROK.
Comparisons using patient samples are complicated by the fact that the true identity and relative abundance of bacteria present are unknown.
The rush of atmospheric carbon altered the relative abundance of different carbon isotopes in the atmosphere and oceans, leaving a signal in the sedimentary record.
To estimate the relative abundance sablefish in the Southern Southeast Inside (SSEI) management area (Clarence Strait and Dixon Entrance) for stock assessment purposes).