The phrase "at a bead" is not commonly recognized as correct or usable in written English without additional context.
It may be used in specific contexts related to crafts, jewelry making, or similar activities where beads are involved.
Example: "She strung the pearls at a bead to create a beautiful necklace."
Alternatives: "on a bead" or "with a bead".
Staring at a bead on a string, for example, trained Barry's misaligned eyes to focus on the same point in space.
Miss Pop used both baguettes and round shapes, which you can find at a bead and trim store or order online.
After a few years of working at a bead shop attached to Nolan Miller's design studio in Beverly Hills, Ms. Nelson and another beader broke off to open their own shop on Sunset Boulevard.
But it does stick out its proboscis at a bead of sugar water, and there's known to be a special neural circuit in the fly for that, too; it involves a special receptor called pickpocket 28.
Cells were stimulated by exogenous supplementation of 2000 U/ml IL-2 (Peprotech, London, UK), and beads conjugated to anti-CD3 and anti-CD28 (Invitrogen, Oslo, Norway) at a bead:cell ratio of 1∶1.
To activate cells for expansion in vitro and in experiments other than suppression assays, anti-CD3 and anti-CD28 coated beads (Dynabeads, invitrogen) were used at a bead: cell ratio of 1∶4 in media containing IL-2 [45].
Following a 3 hour incubation at 4°C, Protein A beads (Sigma) were added for 1 hour.
γδ and CD4+ T cells were activated with anti-CD3/anti-CD28-coated T-Activator Dynabeads® (Invitrogen) at a bead-to-cell ratio of 1 1 for 24 h, prior to incubation with autologous osteoclast precursors or mature osteoclasts.
As a positive control, γδ T cells were cultured in the presence of 100 U/ml IL-2, and CD4+ T cells were activated with anti-CD3/CD28-coated T-Activator Dynabeads at a bead-to-cell ratio of 1 1.
In some experiments γδ and CD4+ T cells were activated with anti-CD3/anti-CD28-coated T-Activator Dynabeads® (Invitrogen) at a bead-to-cell ratio 1 1 for 24 h, or alternatively with 100 U/ml IL-2, prior to incubation with autologous macrophages or osteoclasts.
Libraries were washed with two rounds of AMPureXP magnetic beads (Beckman Coulter, Danvers, MA) at a beads to DNA ratio of 0.8 1 to remove free adapters by size screening.
