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Agrobacterium transformation was used in the production of genetically modified plants from oilseed rape (Brassica napus) and tobacco (Nicotiana tabacum). After inoculation stop with the antibiotic timentin, a subsequent one-week treatment eliminated the vector bacterium from the oilseed rape plate explant cultures. From the tobacco, however, we recorded vector-derived signals one week after potting...
The persistence of cyanobacterial hepatotoxin, microcystin-LR, was investigated in Lake Tuusulanjarvi in southern Finland from August to October, 1993 and 1994. The amount of toxin in particulate material and dissolved in water were determined by HPLC from samples collected from mesocosm enclosures and from the surrounding lake water. In the beginning of the experiments over 80% of the phytoplankton...
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