verb
COLLOCATIONS FROM OTHER ENTRIES
set off/trigger/activate the alarm (= make it start ringing )
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A window blew open, setting off the alarm.
COLLOCATIONS FROM CORPUS
■ ADVERB
also
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Less reciprocal discourse will also activate schemata.
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The away mode, as it adjusts the lights and temperature, also activates the security system.
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But we can also activate the cytoplast at the same time as the donor nucleus is introduced.
only
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The other option is to have it resident at all times but is activated only when you want a fax converting.
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The beam needs to activate only two of the five cells on the staff.
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The input cells are activated only by sensory input.
■ NOUN
cell
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The possibility that intestinal epithelial cells may produce platelet activating factor has been suggested by Kald etal.
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A Pessarane Behesht sleeper cell has been activated in London to assist you.
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So you can effect cell fusion without activating the oocytes if you do this in a calcium-free medium.
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Both cell types generated platelet activating factor activity and this was generally comparable for epithelial and lamina propria cells.
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It was not easy, however, to show whether, and to what extent, these cells were activated .
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The input cells are activated only by sensory input.
gene
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Certainly both groups find that p53 levels rise following radiation, and this could specifically activate transcription of apoptosis-inducing genes .
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Its special property is that it can activate most of the genes that are required in the mature muscle.
platelet
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The content of platelet activating factor in pancreatic tissue was determined using bioassay technique with washed rabbit platelets as described previously.
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The significance of platelet activating factor in the gastric juice of healthy humans is still difficult to analyse.
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About 24 hours before assay the sample was placed in 80% ethanol to extract platelet activating factor from the tissue.
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These results suggest the involvement of platelet activating factor in the endothelin induced fibrinolytic activation and subsequently developed mucosal haemorrhagic lesion.
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These results indicate that platelet activating factor may be an important factor in the progression of acute pancreatitis provoked by caerulein.
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The level of platelet activating factor in the rat gastric mucosa was determined after the administration of endothelin-1 using a radioimmunoassay method.
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Lyso platelet activating factor and alkyl acyl glycerophosphocholine were not significantly higher in Crohn's disease than in controls.
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The role of platelet activating factor blocker in the treatment of inflammatory bowel disease deserves investigation.
system
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For example, edges tend to activate the visual system more than areas of uniform brightness.
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When you try to activate these systems yourself, the body becomes aroused, which pushes sedation and ultimately sleep further away.
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It activated an automatic safety system , sending control rods down into the core of the plant.
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The away mode, as it adjusts the lights and temperature, also activates the security system .
EXAMPLES FROM OTHER ENTRIES
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In certain rare circumstances, these vaccines could activate disease.
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The bomb's firing mechanism is activated by a time-clock.
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The manufacture of chlorophyll in plants is activated by sunlight.
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The process is activated by sunlight.
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The smoke activated the sprinkler system.
EXAMPLES FROM CORPUS
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Baking powder contains its own built-in acid, so it can be activated with just heat and liquid.
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Melanin producing cells in our bodies are activated by ultraviolet light from the sun and can have a protective effect.
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Room keys activate the temperature controls and turn on an entry light, so guests never enter a dark room.
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The different ways in which superantigens activate T cells casts light on the pathogenesis of infectious disease.
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The stun gun was applied to parts of her naked body and activated, the jury was told.
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Then, their ears protected against the piercing whine, they activated the suction pump.
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To be completely safe, he activated his automatic call-signal which would be picked up on the ground.