Sentence examples for before negative for from inspiring English sources

First, to ensure identical testing conditions and reduce affective carryover effects between blocks, our study used a fixed order of blocks for all subjects with neutral stimuli before negative for pure blocks.

As before, negative links account for the highest Δij dN/ dS), followed by the positive links and neutral links (P = 0.06, P = 0.01, respectively).

Over the previous four decades net saving has never before turned negative for more than a year (see chart 4 .If private-sector net saving corrects to its historical norm, this would imply a big fall in demand as consumer spending and investment fell.

Dissociated cells were treated with mAb 2.4G2 to block Fcγ II/III receptors before negative selection for Sca-1 and CD45 by magnetic separation.

Control assay in a serum sample frozen immediately before surgery was negative for HLA antibodies, indicating post-operative occurrence of the specific B lymphocyte response.

All pharyngeal swab samples, except the 1 obtained the day before hospitalization, were negative for the virus.

Serum collected 14 days before transplant tested negative for LCMV-specific IgM and IgG, indicating that this patient was not previously infected with LCMV; in addition, RT-PCR testing on this specimen was negative.

These samples, collected 1 and 2 months before transplant, were negative for PARV4 DNA, which suggests possible transmission of the virus by the transplanted organ or reactivation of a latent infection resulting from immunosuppressive treatments.

Yamamoto et al. compared the gene methylation status in serum DNA before and after surgery in patients with primary breast cancer, and demonstrated that the origin of blood methylated DNA was the tumor tissue because patients with aberrant GSTP1 methylation in serum DNA collected before surgery were found to be negative for gene methylation after surgery [ 33].

Before use, cells tested negative for mycoplasma contamination using MycoSEQ Mycoplasma Detection Kit Life Technologiess).

Naïve rats or time points before arthritis onset were negative for citrulline-specific staining.