delayed reaction


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delayed reaction

 
a reaction, such as an allergic reaction, occurring hours to days after exposure to an inducer.

de·layed re·ac·tion

a local or generalized response that begins 24-48 hours after exposure to an antigen involving sensitized T cells. See: cell-mediated reaction.

de·layed re·ac·tion

(dĕ-lād' rē-ak'shŭn)
A local or generalized immune response that begins 24-48 hours after exposure to an antigen.
See: cell-mediated reaction

reaction

1. opposite action or counteraction; the response of a part to stimulation.
2. the phenomena caused by the action of chemical agents; a chemical process in which one substance is transformed into another substance or substances.

chain reaction
one which is self-propagating; a chemical process in which each time a free radical is destroyed a new one is formed.
coupled reaction
one in which the free energy released by one chemical reaction drives the other reaction.
dark reaction
photosynthetic reaction which fixes CO2 into sugar and which occurs without exposure to light. Called also Calvin cycle.
reaction of degeneration
the reaction to electrical stimulation of muscles whose nerves have degenerated, consisting of loss of response to a faradic stimulation in a muscle, and to galvanic and faradic stimulation in the nerve.
delayed reaction
a reaction, such as an allergic reaction, occurring hours to days after exposure to an inducer.
false negative reaction
an erroneously negative reaction to a test.
false positive reaction
an erroneously positive reaction to a test.
first set reaction
immune reaction
1. immune response; see also immunity.
2. formation of a papule and areola without development of a vesicle following smallpox vaccination.
lengthening reaction
reflex elongation of extensor muscles that permits flexion of a limb.
leukemic reaction, leukemoid reaction
a peripheral blood picture resembling leukemia or indistinguishable from it on the basis of morphological appearance alone, characterized by immature leukocytes in the blood.
reaction pattern analysis
designed to replace archaic, non-specific descriptions of the reactions of the skin to noxious influences; recommended categories are (1) perivascular dermatitis, (2) interface dermatitis, (3) vasculitis, (4) nodular and diffuse dermatitis, (5) intradermal vesicular and pustular dermatitis, (6) subepidermal vesicular and pustular dermatitis, (7) perifolliculitis, folliculitis and furunculosis, (8) fibrosing dermatitis, (9) panniculitis, (10) atrophic dermatosis, (11) mixed reaction patterns.
second set reaction
reaction specificity
lack of production of by-products in enzymatic reactions with yields of products being nearly 100%.
Strauss reaction
development of suppurative peritonitis, localized to the scrotal sac, in the guinea pig after the intraperitoneal injection of material containing Burkholderia mallei.
stress reaction
1. alarm reaction.
2. gross stress reaction.
reaction time
the time elapsing between the application of a stimulus and the resulting reaction.
wheal-flare reaction
a cutaneous sensitivity rection to skin injury or administration of antigen, due to histamine production and marked by edematous elevation and erythematous flare.
References in periodicals archive ?
It all looked so rosy too when Sinclair's delayed reaction to Paul Scholes' thunderous free-kick played Ruud van Nistelrooy onside in first-half stoppage time.
I deliberately leave open the further question as to whether Demand's work is to be understood as a delayed reaction against the literalist--and, more broadly, postmodernist--assertion of the indeterminacy of meaning.
His delayed reaction to Watson's crucial blow made his legs wobble and he eventually fell to the canvas for a mandatory eight count.
Bassist Nicky Wire, 33, said, 'It's a delayed reaction.
Bus drivers and grassroots activists, corporate attorneys and world-renowned celebrities pen the selections in this book that act both as unapologetically male-centered commentary on the world and delayed reaction to Souls of My Sisters, released three years ago by the same editors.
In an effort to explain this delayed reaction, we surmised that the aminoglycoside would have had to pool in the area around the round window niche before it was absorbed through the round window membrane.
It is not clear why this happened, though it may be a delayed reaction by interviewers to changes in the Survey that were instituted in 1994, In any case, while the number of GEDs reported by the Survey increased by 188 percent from 1990 to 1999, the number reported by the GED testing service increased by less than 21 percent.
The participants discussed such practical techniques as the delayed reaction and semantic relaxation, as well as either/or biases, assumptions, and the GS formulations of non-identity, non-allness, and self-reflexiveness.
At first the sense of loss focuses on the missing body part but then there is a delayed reaction as the patient gradually becomes aware of the lost lifestyle," he says.
But they also cause a variety of annoying side effects, including sleepiness, delayed reaction times, attention problems and decreased memory.
However, the Kuala Lumpur and Thai markets were sold down in a delayed reaction after being suspended Wednesday, with the indices down 3.
Departure lobbies at Narita airport Sunday were crowded with vacationers heading overseas apparently in a delayed reaction to earlier fears about possible Y2K computer bug problems, coupled with a newly instituted national holiday system, airport officials said.