Sentence examples for by a second sample from inspiring English sources

Jones failed a preliminary drug test but was cleared by a second sample, and she has maintained that she has not used performance-enhancing substances.

A second pretest (pilot study) was completed by a second sample of 15 parents to assess the quality and response rate for each question.

All sera were obtained from a previously described DENV clinical study (Low et al., 2006; Fink et al., 2007), where early serum samples were obtained during acute DENV infection (1 3 days after onset of fever), followed by a second sample during the defervescent stage of infection (4 7 days after onset of fever).

To be suspended for using a performance-enhancing drug, the positive result for Landis's first sample must be corroborated by testing a second sample.

HIV-positive infants were confirmed by testing a second sample collected at age 10 weeks.

In each experiment, a negative control was included, and positive samples were confirmed by analyzing a second sample.

Mutations and sequence variants detected were reconfirmed by analysing a second sample and a second PCR product respectively.

Changes in IgG anti-HEV serologic status occurring in 2004 were determined by using a second sample taken 12 months later from a subpopulation of 3,431 participants (Table 3) from 7 of the 8 communities.

Preceding the FFT, a linear interpolation between adjacent raw values (sampled at a frequency of 250 Hz) was carried out, followed by a second sampling procedure (by program) at a frequency of 256 Hz, yielding 512 values in the 2.0 s spectral window.

Expression levels of the 47 selected genes were confirmed by qPCR in a second sample set consisting of 78 patients and 78 age and gender matched controls.

On each plane, one dust sample was obtained by vacuuming the carpet, with a second sample obtained by vacuuming the air return grilles located near the floor on the wall of the plane.