positive control

Also found in: Dictionary, Acronyms, Encyclopedia, Wikipedia.

pos·i·tive con·trol

regulation of an enzyme activity by an activator of that enzyme. Also, regulation via induction of a specific protein's biosynthesis or activation of a protein's processing.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
Furthermore, negative responses to sensibility tests in both traumatized and positive control teeth were associated with lower PBF values.
In positive control group, all (100%) the burs showed contamination (Table-1).
There was also a between-subject main effect of school, [chi square] (2, 15) = 6.080, p = 0.048, showing a greater percent of participants who consumed zero to one daily dessert at both the intervention school (57%) and the positive control school (52%) compared to the negative control school (30%).
(a) Negative control group, (b) intestines from a positive control group rabbit showing marked congestion in the duodenal section (arrow) and in the caecum (arrow head) with well-formed fecal pellets in the colon (thin arrows), (c) amprolium group, (d) diclazuril group, (e) sulphachloropyrazine group, and (f) trimethoprim-sulphamethoxazole group.
Positive control showed significant (P<0.0001) reduction in skin thickness after 48 and 72 hours as compared to negative control.
To compare and select the better of the two, B1 and RE PCR were performed using serial dilutions of the positive control as described in methods.
The positive control using MMS as mutagen was expected to yield higher counts of micronuclei as it was used to induce mutations.
Lane 1, molecular weight marker; lanes 2-5, DraI digested PCR products; lane 6, DNA positive control for E.
A 21-day equivalence study of a 2% propolis-based rinse compared to a positive control rinse containing 0.05% NaF plus 0.05% CPC in 21 pairs of twins demonstrated no difference (p > 0.05) between the groups in suppressing gingival inflammatory values through papillary bleeding scores and standard digital imaging of the gingival tissue, referred to as a G parameter.
On the same days, we registered an increase in the group treated with LPS (positive control group), even though with lower levels with respect to the therapeutic group.
The animals were randomly divided into experimental, positive control, reference, and negative control groups (30 animals per each).

Full browser ?