«But this gives us clues about the original concentration of oxygen and silicon in the core, because only some silicon: oxygen ratios are compatible with this model.» (sciencedaily.com)
Findings showed the system was able to concentrate inoculated salmonella by 500 to 1,000 times the original concentration in test samples. (sciencedaily.com)
Forty - eight hours after transfection, the media were centrifuged and the supernatant was diluted with culture medium to 100 %, 50 % and 25 % the original concentrations. (journals.plos.org)