The phrase "a control at a" is not complete and lacks context, making it difficult to determine its correctness in written English.
It could potentially be used in a technical or operational context where controls are being discussed, but it needs additional information to clarify its meaning.
Example: "We need to establish a control at a specific point in the process to ensure quality."
Alternatives: "a regulation at a" or "a measure at a".
Antibody against β-actin was used as a control at a dilution of 1∶7500.
Therefore, T2 is used as a control, at a point when visual and VTA inputs are temporally separated.
It allows a flexible model for the time-varying exposure-outcome association and, because it handles time continuously, involves no ambiguity over the definition of a control at a given time point.
HUVECs were infected with adenoviral vectors containing rat calpastatin gene (Ad-CAST, University of Buffalo, USA) or beta-gal (Ad-gal, Vector Biolabs) as a control at a multiplicity of infection (MOI) of 10 PFU/cell.
Cells were then infected with Ad-ChM1 or Ad-LacZ as a control, at an appropriate multiplicity of infection (MOI) and were further cultured.
(A ) Primary hepatocytes were prepared from Lrh-1 f/f and Lrh-1 LKO mice and transduced with Ad-Plk3 or Ad-control at a MOI of 100.
(C ) Primary hepatocytes were prepared from Lrh-1 f/f and Lrh-1 LKO mice and transduced with Ad-Plk3 or Ad-control at a MOI of 100.
(B ) Primary hepatocytes were prepared from Lrh-1 LKO mice and transduced with Ad-Plk3 or Ad-control at a MOI of 100.
Primary hepatocytes from control and Lrh-1 LKO mice were transduced with Ad-Plk3 or Ad-control at a MOI of 100 and treated with 1 µg/ml doxycycline and vehicle or 0.01 µg/ml TM.
(E ) Primary hepatocytes from control mice were transduced with Ad-DN Atf2 (Ato2 T51A/T53A to serve as a dominant negative) or Ad-control at a MOI of 100 and treated with 5 ng/ml TM.
Primary hepatocytes from control and Lrh-1 LKO mice were transduced with Ad-C2/Atf2 (expressing a constitutively active Atf2) or Ad-control at a MOI of 100 and treated with 5 ng/ml TM.
