Exact(35)
XRD cannot detect amorphous solids or minerals that are present at less than 2 wt%.
In recent years, highly sensitive assays have been developed that detect HIV-1 drug resistance mutations when present at less than 1% of the viral population.
If sulfur was present in the sample, it is present at less than one part per billion, providing no significant contribution to the particle structure nor role in its bulk material properties.
The RP-IP UPLC method conditions are ESI-MS compatible and have allowed for the mass identification of five positional isomeric impurities chromatographically resolved and present at less than 1% of the nominal parent peak area.
Based on the maximum As concentration determined in the oxida-tive extractions of the sediments and assuming that the As content of sulfide minerals present in the sediments exceeds 1.3 μmol/g (100 ppm), the lower limit for pyrite,[1] sulfide minerals should be present at less than 0.4% by weight of the sediment.
In conclusion, patients visiting Arba Minch Hospital for HIV treatment have started to present at less advanced disease stages.
Similar(25)
Also, as the programme is longer in place, patients might present themselves at less advanced clinical stages before ART initiation.
Cdo –/− ;Boc +/− mice were present at slightly less than the expected frequency (supplementary material Table S1).
In these plants, D1 is present at far less than 25% of the wild-type amount.
It may even be present at doses less than 5 mg, although this result was inconclusive (aRR 1.10, 0.99 to 1.22).
All assays using these compounds included appropriate solvent controls, and all solvents were present at concentrations less than 1% w/v in the final assay mixture.
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