Abstract: A more efficient breeding against infestation with beet cyst nematode, or the development of new resistant lines, is enabled via the provision of the Heterodera resistance-mediating nucleic acid molecule according to the invention; in particular, a dominant resistance effect in the target plant is evoked by the property of the identified nucleic acid molecule. The Heterodera resistance-mediating nucleic acid molecule, and embodiments of the present invention that are described in the preceding, offer additional applications, e.g., the use of the resistant gene allele in cis-genetic or trans-genetic approaches, with the goal of developing new resistant cultivars.

Abstract: A method for the corrosion protection of steam generators having a housing containing feed water and enclosing a tube bundle with tubes conducting a heat carrier includes continuously determining the redox potential of the feed water during operation of the steam generator, continuously determining the corrosion potential of at least one tube of the tube bundle during operation of the steam generator, and negatively shifting the redox and corrosion potentials by changing the chemical conditioning of the feed water if the potentials indicate the danger of corrosion, and a device for carrying out the method.