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• n  a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film
• n  a person who directs and restrains

• Ahead of her, a door opened, and the heifer ran forward--into the waiting arms of a "V-conveyor restrainer," which held her on both sides and immobilized her legs.
• This is the organization which turned up in former years with a cow-tail restrainer (to prevent milkers from being switched); a funnel to facilitate the insertion of keys in .
• This has added a hard-to-master new responsibility to the job description of Fed chairman: restrainer of financial-market euphoria.

• controller

News & Articles

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• Social experience drives empathetic, pro-social behavior in rats
  Empathy-driven behavior has been observed in rats who will free trapped companions from restrainers. This behavior also extends toward strangers, but requires prior, positive social interactions with the type (strain) of the unfamiliar individual, report scientists. The findings suggest that social experiences, not genetics or kin selection, determine whether an individual will help strangers ...
  Jan. 14, 2014 - Science Daily
• Empathetic, Pro-social Behavior In Rats Driven By Social Experience
  [ Watch The Video: Social Experiences Determine Whether Rats Will Help Strangers ] University of Chicago Medical Center Rats will help a stranger in distress only if they have had prior social experience with the type of the unfamiliar individual Empathy -driven behavior has been observed in rats who will free trapped companions from restrainers. This behavior also extends toward strangers, but ...
  Jan. 14, 2014 - redOrbit