The nucleus of that group is the 70 scientists acquired when Pfizer bought Rinat, a biotech aimed at Alzheimer's.

FORBES: Magazine Article

In particular, the participants set out to identify researchers and other qualified personnel from different Andean countries, who could form the nucleus of a Working Group on Snow and Ice within the framework of an Andean-FRIEND (Andean - Flow Regimes from International Experimental and Network Data).

UNESCO: Valdivia, Chile, 2003

The Seibu Saison group of companies, of which Seiyu is the nucleus, owned track running from the Chichibu mountains west of Tokyo to Ikebukuro and Shinjuku in the city centre although the railway and the retailer parted company in the 1970s.

ECONOMIST: Japanese retailing