| pubmed-article:7295836 | pubmed:abstractText | An improved technique for perfusing the fetal guinea pig placenta in situ is described. The result shows linear pressure-flow relations in the rane of 15-50 mm Hg. assumed to be physiological. The preparation shows impermeability for trypan blue. The placental transfer is stereoselective for L-alanine compared with D-alanine. This transfer is ouabain-sensitive, and proceeds against a concentration gradient. | lld:pubmed |
