Concentration and localization of hydroxylamine in the reservoirs and lakes in the territory of European Russia

Bikbulatova, E. M.; Stepanova, I. E.; Bikbulatov, E. S.

doi:10.1134/s0097807807050107

Cited by 7 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it was not possible to approximate the IC 50 concentration of NH 2 OH inhibition from short-term batch incubations, and further studies are warranted to assess the IC 50 concentration of the long-term inhibition of NH 2 OH. NH 2 OH may accumulate at the submicromolar range in natural aquatic environments ( Fukumori et al , 2003 ; Bikbulatova et al , 2007 ) and at the submillimolar range in nitrifying cultures ( Soler-Jofra et al , 2021 and references therein); however, the impact of NH 2 OH on nitrogen transformation reactions remains unclear. Further studies are needed to examine NH 2 OH transformation, including anammox bacterial NH 2 OH disproportionation, in natural and man-made ecosystems.…”

Section: Discussionmentioning

confidence: 99%

NH<sub>2</sub>OH Disproportionation Mediated by Anaerobic Ammonium-oxidizing (Anammox) Bacteria

et al. 2022

View full text Add to dashboard Cite

Anammox bacteria produce N 2 gas by oxidizing NH 4 + with NO 2 – , and hydroxylamine (NH 2 OH) is a potential intermediate of the anammox process. N 2 gas production occurs when anammox bacteria are incubated with NH 2 OH only, indicating their capacity for NH 2 OH disproportionation with NH 2 OH serving as both the electron donor and acceptor. Limited information is currently available on NH 2 OH disproportionation by anammox bacteria; therefore, the stoichiometry of anammox bacterial NH 2 OH disproportionation was examined in the present study using 15 N-tracing techniques. The anammox bacteria, Brocadia sinica , Jettenia caeni , and Scalindua sp. were incubated with the addition of 15 NH 2 OH, and the production of 15 N-labeled nitrogenous compounds was assessed. The anammox bacteria tested performed NH 2 OH disproportionation and produced 15-15 N 2 gas and NH 4 + as reaction products. The addition of acetylene, an inhibitor of the anammox process, reduced the activity of NH 2 OH disproportionation, but not completely. The growth of B. sinica by NH 2 OH disproportionation (–240.3‍ ‍kJ mol NH 2 OH –1 under standard conditions) was also tested in 3 up-flow column anammox reactors fed with 1) 0.7‍ ‍mM NH 2 OH only, 2) 0.7‍ ‍mM NH 2 OH and 0.5‍ ‍mM NH 4 + , and 3) 0.7‍ ‍mM NH 2 OH and 0.5‍ ‍mM NO 2 – . NH 2 OH consumption activities were markedly reduced after 7‍ ‍d of operation, indicating that B. sinica was unable to maintain its activity or biomass by NH 2 OH disproportionation.

show abstract

Section: Discussionmentioning

confidence: 99%

NH<sub>2</sub>OH Disproportionation Mediated by Anaerobic Ammonium-oxidizing (Anammox) Bacteria

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Hydroxylamine is also ubiquitous in water resources as an intermediary product of the nitrogen cycle ( e.g. , nitrification, denitrification, and nitrogen fixation). − Although it is highly reactive and thus short-lived, it occurs in water resources at 1–100s μg/L. − Most environmentally relevant DOM, which can contain a variety of nucleophilic moieties beyond those considered herein, is also ubiquitous in surface and groundwater, typically at concentrations of 1–100 mg C /L …”

Section: Environmental Implicationsmentioning

confidence: 99%

Photolysis of Trenbolone Acetate Metabolites in the Presence of Nucleophiles: Evidence for Metastable Photoaddition Products and Reversible Associations with Dissolved Organic Matter

Pflug

Kral

Hankard

et al. 2020

Environ. Sci. Technol.

View full text Add to dashboard Cite

Photolysis of trenbolone acetate (TBA) metabolites in the presence of various nitrogen-, sulfur-, or oxygen-containing nucleophiles (e.g., azide, ammonia, or thiosulfate, respectively) results in rapid (half-lives ∼20–60 min), photochemically induced nucleophile incorporation across the parent steroid’s trienone moiety. The formation of such nucleophile adducts limits formation of photohydrates, suggesting competition between the nucleophile and water for photochemical addition into the activated steroid structure. Analogous to previously reported photohydration outcomes, LC/MS analyses suggest that such photonucleophilic addition reactions are reversible, with more rapid elimination rates than thermal dehydration of photohydrates, and regenerate parent steroid structures. Beyond photonucleophilic addition pathways, we also found that hydroxylamine and presumed nucleophilic moieties in model dissolved organic matter (DOM; Fluka humic acid) can react via thermal substitution with TBA metabolite photohydrates, although this reaction with model DOM was only observed for photohydrates of trendione. Most nucleophile addition products [i.e., formed via (photo)reaction with thiosulfate, hydroxylamine, and ammonia] are notably more polar relative to the parent metabolite and photohydration products. Thus, if present, both nucleophilic adducts and bound residues in organic matter will facilitate transport and help mask detection of TBA metabolites in surface waters and treatment systems.

show abstract

“…nitrification, denitrification, and nitrogen fixation). [137][138][139] Although it is highly reactive and thus short-lived, it is nevertheless detected in water resources at 1-100s µg/L concentrations. [137][138][139] Finally, HA is also ubiquitous in surface and groundwater, typically at concentrations of 1-100 mg/L.…”

Section: Environmental Implicationsmentioning

confidence: 99%

“…[137][138][139] Although it is highly reactive and thus short-lived, it is nevertheless detected in water resources at 1-100s µg/L concentrations. [137][138][139] Finally, HA is also ubiquitous in surface and groundwater, typically at concentrations of 1-100 mg/L. 125 As previously mentioned, several studies have observed the occurrence of all three TBA metabolites in animal feedlot runoff and its receiving waters at concentrations of 10s-100s ng/L.…”

Section: Environmental Implicationsmentioning

confidence: 99%

Identification of bioactive products from environmental transformation of steroids

Pflug¹

View full text Add to dashboard Cite

am especially thankful for all of Andrew's help with experiments while I was busy writing this thesis, I couldn't have done it without you buddy. I am grateful for Dr. Daniel Schlenk and Dr. Allison Kupsco of the University of California, Riverside for help with glucocorticoid bioassays. Thank you to Dr. Kristine Wammer and Dr. Dalma Martinović of the University of St. Thomas Minnesota for their help with dienogest and trendione photolysis, nuclear hormone bioassays, and manuscript preparation. Kris, it was a true pleasure to collaborate with you. I would also like to thank Dr. Ed Kolodziej of the University of Washington for his help with manuscript editing and environmental occurrence studies. I am also grateful for Dr. Eric Patterson of Stony Brook University for his help with computational studies and fruitful discussions. I would like to thank the UI, the UI Chemistry Department, and the UI Department of Civil and Environmental Engineering for giving me the opportunity to work and study here. Support from the UI Graduate College and the National Science Foundation are gratefully acknowledged. I am extremely thankful for all of my family and friends for their love and support. Tania, you have been one of my best friends (gal pal, haha) for almost eight years now. Thank you for allowing me to be myself-quirks, flaws, and all. Thank you for your patience, acceptance, devotion, and unconditional love. I am so proud to call you my wife and I am excited for our next big adventure together. There is no one I would rather walk this path alongside. I love you. I would also like to thank my cousin Benjamin for v everything. You have been one of my best friends since we were little kids. I will never forget the fun times we have had along the way, shooting guns, playing music, going to concerts, hunting, fishing, camping, and just hanging out. You have made my life much more enjoyable and helped to keep me sane while working toward my PhD. I would like to thank the best siblings on the planet, my sister Vanessa and brother Brandon for their love and support. I am so proud of the young adults you have become, you are both so incredibly talented and two of the most genuine, caring, and loving persons I have ever met. Finally, I would like to thank my parents Matt and Sandra. Words cannot come close to expressing what you mean to me. My path up to this point has encountered many twists, turns, bumps, and obstacles and you have never once doubted or lost faith in me. You have shown me unconditional love and support; I am forever grateful for you. You have shown and taught me the definition of true love and you are the perfect example of a role model; there is no one I look up to more than you. I will love you always and I dedicate this to you.

show abstract

Concentration and localization of hydroxylamine in the reservoirs and lakes in the territory of European Russia

Cited by 7 publications

References 10 publications

NH<sub>2</sub>OH Disproportionation Mediated by Anaerobic Ammonium-oxidizing (Anammox) Bacteria

NH<sub>2</sub>OH Disproportionation Mediated by Anaerobic Ammonium-oxidizing (Anammox) Bacteria

Photolysis of Trenbolone Acetate Metabolites in the Presence of Nucleophiles: Evidence for Metastable Photoaddition Products and Reversible Associations with Dissolved Organic Matter

Identification of bioactive products from environmental transformation of steroids

Contact Info

Product

Resources

About