The phrase "assay tubes" is correct and usable in written English.
It can be used in scientific or laboratory contexts, particularly when referring to tubes used for conducting assays or tests.
Example: "The laboratory technician carefully placed the samples into the assay tubes for analysis."
Alternatives: "test tubes" or "sample tubes".
Transport assays were initiated by the addition to the assay tubes of 100 µl of radioactively traced proline (0.5 µCi) to a final concentration of 0.31 mM or 1.36 mM, supplemented or not with 0.5 mM T4C. V0 was measured at 28°C for 30 s, and proline transport was stopped by addition of 800 ml of cold 50 mM proline in PBS, and rapid washing by centrifugation at 10,000 g for 60 s.
The study involved a series of five assay tubes for each compound against each strain.
The assay tubes were incubated protected from light for 2 h at RT.
In control assay tubes without the cyanide gradient, most J2 remained in sinusoidal shape, dispersed throughout the tube, and formed neither bands nor clumps.
Assays were conducted in tubes produced by cutting clear 5-ml polystyrene aspirating pipettes (VWR, Brisbane, CA) into 52-mm-long sections (assay tubes).
A volume of 50 µl of each sample was transferred to the appropriate assay tubes containing mixed capture beads and PE detection reagent.
The Immulite 2000 XPi was a continuous random-access system designed around a proprietary assay tube that allowed for efficient washing of an integral antibody- or antigen-coated polystyrene beads as solid phase.
Cyanide concentration was measured at several positions in a parallel assay tube without nematodes at one and 24 h after assay initiation (Figure 2B).
Total protein amount was determined according to Bradford [17] and PDE3 activity was measured (15 islets per assay tube) as described below.
One million cells from each sample were rinsed with 2 ml of 1XPBS containing 0.5% BSA by centrifugation and resuspended in 90 µl of incubation buffer per assay tube for 10 min. 10 µl of conjugated antibody was added to the assay tube and incubated for 60 min in the dark at room temperature.
One hour later, the parafilm was removed from the bottom of the assay tube, which was then attached to the top of the donor tube by sealing the junction with parafilm.
