| restriction endonuclease fingerprinting analysis of canadian isolates of aeromonas salmonicida. | restriction endonuclease fingerprinting (ref) analysis was used to examine total cellular dna prepared from 56 independent field isolates of the fish pathogen, aeromonas salmonicida. dna was digested singly with the restriction enzymes ecori and hindiii, and the resulting fragments separated by polyacrylamide gel electrophoresis and visualized by silver staining. the ref patterns of typical isolates of a. salmonicida subsp. salmonicida were distinct from those of a. hydrophila, a. salmonicida su ... | 1990 | 2159364 |
| springtime resumption of photosynthesis in balsam fir (abies balsamea). | photosynthesis in balsam fir (abies balsamea (l.) mill.) was measured in the field at two locations in new brunswick, canada from late winter to late spring in 2004 and 2005. no photosynthesis was detectable while the soil remained below 0 degrees c throughout the rooting zone. in both years, photosynthesis began once soil temperature rose to 0 degrees c. in potted seedlings in growth chambers, there was no photosynthesis at an air temperature of 10 degrees c if the pots were frozen. these findi ... | 2008 | 18450571 |