| behavior of bacterial spores in aqueous polymer two-phase systems. | sacks, l. e. (western regional research laboratory, albany, california), and gordon alderton. behavior of bacterial spores in aqueous polymer two-phase systems. j. bacteriol. 82:331-341. 1961.-free spores of various species of the bacillaceae enter the upper phase in a two-phase aqueous polymer system containing polyethylene glycol 4000 and potassium phosphate. vegetative cells appear in the lower phase and subcellular debris is concentrated chiefly at the interface. the high selectivity of the ... | 1961 | 13745253 |