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A. Hartmann
Researcher at University of Wisconsin-Madison
Publications - 3
Citations - 261
A. Hartmann is an academic researcher from University of Wisconsin-Madison. The author has contributed to research in topics: Nitrogenase & Rhodospirillum rubrum. The author has an hindex of 3, co-authored 3 publications receiving 256 citations.
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Regulation of nitrogenase activity by ammonium chloride in Azospirillum spp.
TL;DR: Ammonium chloride effectively and reversibly inhibited the nitrogenase activity of Azospirillum brasilense, Azospiralillum lipoferum and AzospIRillum amazonense, providing further evidence for glutamine as a metabolite of regulatory importance in the NH4+ switch-off phenomenon.
Journal ArticleDOI
Posttranslational regulatory system for nitrogenase activity in Azospirillum spp.
TL;DR: It is concluded that a posttranslational regulatory system for nitrogenase activity is present in A. brasilense and A. lipoferum and that it operates via ADP-ribosylation of dinitrogenase reductase as it does in R. rubrum.
Journal ArticleDOI
Influence of amino acids on nitrogen fixation ability and growth of Azospirillum spp.
TL;DR: It was concluded that growth on histidine as the sole source of nitrogen, carbon, and energy may be used for the taxonomic characterization of Azospirillum spp.