Abstracts - faqs.org

Abstracts

Biological sciences

Search abstracts:
Abstracts » Biological sciences

Nitrification and denitrification in lake and estuarine sediments measured by the 15N dilution technique and isotope pairing

Article Abstract:

Lake and estuarine sediment samples were analyzed for nitrification and denitrification rates in a continuous-flowthrough system using the 15N dilution technique and isotope pairing. The results showed that 100% of the total nitrate uptake in both sediments could be accounted for by denitrification originating from the overlying water. When denitrification was coupled to nitrification, the coupled process accounted for 10% of the total denitrification at steady state in the dark. On the other hand, the coupled process accounted for 50% of the total nitrification.

Author: Revsbech, Niels Peter, Rysgaard, Soren, Risgaard-Petersen, Nils, Nielsen, Lars Peter
Publisher: American Society for Microbiology
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1993
Estuarine sediments, Nitrification, Lake sediments

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


A microsensor for nitrate based on immobilized denitrifying bacteria

Article Abstract:

A biosensor for nitrate can be constructed by inserting a N2O microsensor into a 30- to 70-micrometer wide capillary with immobilized denitrifying bacteria. The bacteria reduces O2 so that anaerobic denitrification is possible at lower levels of the capillary while the bacteria at the tip of the capillary are exposed to O2. Acetylene is added to block nitrous oxide reductase. The reduction of NO3- or NO2- by the bacteria to N2O is measured by the sensor. The N2O evolved is proportional to NO3- in the culture.

Author: Binnerup, Svend Jorgen, Revsbech, Niels Peter, Larsen, Lars Hauer
Publisher: American Society for Microbiology
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
Bacteria, Nitrous oxide

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA



Subjects list: Research, Measurement, Denitrification
Similar abstracts:
  • Abstracts: Purification and characterization of anti-Listeria compounds produced by Geotrichum candidum. Diversity of Geotrichum candidum strains isolated from traditional cheesemaking fabrications in France
  • Abstracts: Isolation and characterization of SUA5, a novel gene required for normal growth in Saccharomyces cerevisiae. cis- and trans-acting suppressors of a translation initiation defect at the cyc1 locus of Saccharomyces cerevisiae
  • Abstracts: Purification and characterization of an extremely thermostable cyclomaltodextrin glucanotransferase from a newly isolated hyperthermophilic archaeon, a Thermococcus sp
  • Abstracts: Meiotic nondisjunction and recombination of chromosome III and homologous fragments in Saccharomyces cerevisiae
  • Abstracts: Classification of virulent and temperate bacteriophages of Listeria spp. on the basis of morphology and protein analysis
This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.
Some parts © 2025 Advameg, Inc.