The phrase "a secondary agent" is correct and usable in written English.
It can be used in contexts where you are discussing roles or functions, particularly in fields like business, law, or science, where multiple agents or parties are involved.
Example: "In this transaction, the primary agent is responsible for negotiations, while a secondary agent will handle the logistics."
Alternatives: "an auxiliary agent" or "a subordinate agent".
The fungicide was used as a secondary agent to prevent the conidial germination of M. anisopliae or B. bassiana on insect cuticle.
This approach has the distinct advantage of not requiring the inclusion of a secondary agent (e.g. a lipid, viral package or carrier protein) any of which can be immunogenic or toxic.
Many vaccines also include a secondary agent, known as an adjuvant, to further stimulate the immune response.
These features show the advantage of using the aptamer as a secondary probing agent rather than the usual secondary antibodies.
The role of Fe as a secondary passivating agent and Mo as an accelerator of transpassive dissolution is also taken into account.
Multilayered polyelectrolyte films fabricated from plasmid DNA and a hydrolytically degradable synthetic polycation can be used to direct the localized transfection of cells without the aid of a secondary transfection agent.
We define OSD as a released chemical toxin that acts both as a secondary defence agent and as an olfactory signal.
For detection of some immunoprecipitates, protein A-HRP (GE Healthcare) was employed as a secondary detection agent.
Consistent with our experience, participants failed to choose a secondary antipseudomonal agent for HCAP up to 36% of the time [ 18].
However, the role of ASA as a secondary preventative agent remains unclear; further studies need to establish this benefit to harm profile.
Recently, randomised controlled trials investigating folic acid as a secondary preventative agent in colorectal neoplasia have shed further light on the relationship between folate and colorectal carcinogenesis, corroborating data from animal models indicating opposing effects dependent on the timing of exposure in relation to the development of neoplastic foci.
