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Capping may refer to: the creation of five-prime (5') caps in a cell nucleus Capping enzyme; Cap (sport), making an appearance in a game at international level; Ambulance chasing, the practice of lawyers seeking clients at a disaster site; Jakugo, or capping phrase, a response to a Zen kōan; Capping stunt, a New Zealand university student prank
A capping agent is used during nanoparticle synthesis to inhibit particle growth and aggregation. The chemical blocks or reduces reactivity at the periphery of the particle—a good capping agent has a high affinity for the new nuclei. [112] Citrate ions or tannic acid function both as a reducing agent and a capping agent.
A capping enzyme (CE) is an enzyme that catalyzes the attachment of the 5' cap to messenger RNA molecules that are in the process of being synthesized in the cell nucleus during the first stages of gene expression. The addition of the cap occurs co-transcriptionally, after the growing RNA molecule contains as little as 25 nucleotides.
Other ingredients can be added to the gelling agent solution including plasticizers such as glycerin or sorbitol to decrease the capsule's hardness, coloring agents, preservatives, disintegrants, lubricants and surface treatment. Since their inception, capsules have been viewed by consumers as the most efficient method of taking medication.
The impact of reducing agent strength can be seen by inspecting a LaMer diagram which describes the nucleation and growth of nanoparticles. [21] When silver nitrate (AgNO 3) is reduced by a weak reducing agent like citrate, the reduction rate is lower which means that new nuclei are forming and old nuclei are growing concurrently. This is the ...
This phenomenon, the process of which is called cap formation, was discovered in 1971 on lymphocytes [1] and is a property of amoebae and all locomotory animal cells except sperm. The crosslinking is most easily achieved using a polyvalent antibody to a surface antigen on the cell.
The idea of using adhesive materials for direct pulp capping has been explored two decades ago. [as of?] Studies have demonstrated that it encourages bleeding due to its vasodilating properties hence impairing polymerisation of the material, affecting its ability to provide a coronal seal when used as a pulp capping agent. In addition, the ...
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