Search Details

Word: liebig (lookup in dictionary) (lookup stats)
Dates: all
Sort By: most recent first (reverse)


Usage:

Earlier studies had shown that a queen that senses potential competition from another fertile female will chemically mark the pretender; that female will then be attacked by lower-ranking females. Biologists Jürgen Liebig and Adrian Smith of Arizona State University suspected that something similar might go on even without the queen's intervention and believed the answer might lie in scent chemicals called cuticular hydrocarbons...

Author: /time Magazine | Title: First Rule of the Ant Colony: No Hanky-Panky | 1/10/2009 | See Source »

Ants that are capable of reproducing naturally emit hydrocarbon-based odors, and the eggs they produce smell the same way. Ants that can't reproduce emit no such odor. Liebig and Smith produced a synthetic hydrocarbon in the lab that had the same olfactory properties as the natural one, then plucked a few innocent ants from a nest and dabbed the chemical on them. When they were returned to the colony, they were promptly attacked - never mind that they had essentially been framed...

Author: /time Magazine | Title: First Rule of the Ant Colony: No Hanky-Panky | 1/10/2009 | See Source »

...complex critters might be glad to be part of a species that's free of such Draconian sexual rules, but Liebig doesn't think it's wise to get above ourselves. All manner of lawsuits, divorces and blood feuds can erupt over people breeding when - or with whom - they oughtn't. Often, the methods used to expose the cheaters aren't terribly different from those of the ants: more than one philanderer, after all, has been exposed by a whiff of the wrong perfume on his clothes when he came home. "The idea that social harmony is dependent on strict...

Author: /time Magazine | Title: First Rule of the Ant Colony: No Hanky-Panky | 1/10/2009 | See Source »

...total of six animals with characteristics of both sheep and goats. Only one of them, however, had blood proteins from both species. That animal behaves like a goat and has even tried mating with female goats, but like another hybrid, the mule, its sperm are defective. At Justus-Liebig University in Giessen, West Germany, other embryo manipulators also reported producing goat-sheep...

Author: /time Magazine | Title: Science: It's a Geep | 2/27/1984 | See Source »

...Keogh, who was born 39 years ago on a 280-acre farm in Platte County, Neb., was eleven and in the seventh grade in 1928 when he was the lone pupil in District 42 School in Burrows Township. With the undivided attention of Teach er Elizabeth Liebig, he studied seventh and eighth-grade lessons simultaneously. In between, he argued politics with Teacher Liebig: she was for Prohibition and against Al Smith; he was for Smith, against Prohibition...

Author: /time Magazine | Title: Publisher's Letter, Nov. 14, 1955 | 11/14/1955 | See Source »

| 1 | 2 | 3 | Next