We say that a space X has the separation property provided that if A and B are subsets of X with A countable and B first category, then there is a homeomorphism f : X → X such that f(A) ∩ B = ∅. We prove that a Borel space with this property is Polish. Our main result is that if the homeomorphisms needed in the separation property for the space X come from the homeomorphisms given by an action ...

Undiluted cytosolic extracts were prepared from fast glycolytic muscle tissue of white perch (Morone americanus). Diffusion coefficients (D) through the cytosol preparations were estimated in vitro for a series of selected low molecular weight compounds using an experimental diffusion chamber. Determinations were made at 5 degrees and 25 degrees C to assess thermal sensitivity of the process. N...

Renin concentration was determined in plasma and amniotic fluid samples immediately after collection, after storage at -18 degrees C for up to 48 h, and after storage at 5 degrees C for as long as 48 h. Renin concentration increased, both in plasma (p less than 0.05) and amniotic fluid (P less than 0.02), after the storage at 5 degrees C, but no significant alteration occurred on storage at -18...