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The extent, mechanism, and function of cell volume changes during specific cellular events, such as cell migration and cell division, have been poorly studied, mostly because of a lack of adequate techniques. Here we unambiguously report that a large range of mammalian cell types display a significant increase in volume during mitosis (up to 30%). We(More)
One major advantage of using genetically tractable model organisms such as the fission yeast Schizosaccharomyces pombe is the ability to construct temperature-sensitive mutations in a gene. The resulting gene product or protein behaves as wildtype at permissive temperatures. At non-permissive or restrictive temperatures the protein becomes unstable and some(More)
Mated pairs of Mongolian gerbils were rejoined by two of their own young, one of each sex, after periods of separation starting when the young were four or seven weeks old and lasting either one or four weeks. An additional sub-group of litters was separated when six weeks old, for a period of separation of two weeks. In another group of mated-pairs,(More)
This paper deals with the quantitative study of the social interaction in dyads of laboratory rats. Two kinds of dyads of Rattus norvegicus were observed: one which had the conventional rat intestinal flora (S.S.C.u.p.) and the other a micro-flora (J.L.T.) derived from feral rats, each member of the dyad having the same sex. Contact-seeking and sniffing(More)
Mated pairs of Mongolian gerbils were rejoined by two of their own young, of both sexes, after periods of separation starting when the young were four or seven weeks of age and lasting either one or four weeks. An additional group of young was separated from their parents when six weeks old, this time for two weeks. The occurrence of sniffing, opposition(More)
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