positive control


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positive control

i. A method of airspace control that relies on positive identification, tracking, and the direction of an aircraft within an airspace, conducted with electronic means by an agency with the authority and responsibility.
ii. Tactical control of an aircraft by a designated control unit, in which the pilot receives orders affecting the aircraft's movements and which immediately transfers responsibility for its safe navigation to the unit issuing the orders.
References in periodicals archive ?
PC: Positive control; NC: Negative control TABLE 3.
The intensity of electric current was slowly increased by turning a dial on the tester from 0 to 10 at a rate of one numerical increase per five seconds until a response was obtained.3 The positive control tooth was tested first, followed by the contralateral traumatized tooth.
The negative control group had uncontaminated burs (new/unused) while the positive control group consisted of used contaminated burs.
Interestingly, the students at the positive control school who had previously received two years of CATCH instruction showed no significant differences in their preassessment response rates to any item on the questionnaire when compared with the negative control and intervention schools.
A1, negative control; 2B, amprolium; 3C, positive control; 4D, diclazuril; 5E, sulphachloropyrazine; and 6F, trimethoprim-sulphamethoxazole.
Positive control showed significant (P<0.0001) reduction in skin thickness to negative control after 24 hours.
Negative and positive control PCR from first-round amplified product were used in the second round negative and positive controls respectively.
Results showed that the mutagen MMS as the positive control (T3) had the highest incidence of micronuclei formation in the experiment while the genotoxic treatment (T4) at 500 ppm including the negative control treatments (T1 and T2) had the lowest micronuclei counts.
(16) More recently a large (n = 300) 4-day plaque regrowth study comparing an aloe vera extract rinse to 0.2% CHG and a placebo rinse showed both the test group and positive control to significantly (p < 0.05) reduce plaque compared to the placebo, while no statistically significant difference was demonstrated between them.
Additionally, as a positive control, an injection of 25 [micro]l of lipopolysaccharide LPS (Sigma-Aldrich, Missouri, USA) at a concentration of 2mg/ml (50 [micro]g in total) was injected into the skin of non-tumor-bearing mice.
A commonly used commercial medical fungicide clotrimazole was used as a positive control (standard).

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