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Nitrogen Fixation

by Manuela Kaiser, Gary Sawers, Lehrstuhl Fur, Mikrobiologie Der
"... Overlapping promoters modulate Fnr- and ArcA-dependent anaerobic transcriptional activation of the focApfl operon in Escherichia coli ..."
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Overlapping promoters modulate Fnr- and ArcA-dependent anaerobic transcriptional activation of the focApfl operon in Escherichia coli

NITROGEN FIXATION IN LAKE ERKENl

by Ulf Granhall, Alf Lundgren
"... In situ fixation of molecular nitrogen was mcasurcd in 19170 in the pelagial of Lake Erkcn by the acetylene reduction technique every 2 weeks during a period of 5 months. The diurnal cycles and vertical distribution of algae were also investigated. Fixation was correlated with the presence of hetero ..."
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In situ fixation of molecular nitrogen was mcasurcd in 19170 in the pelagial of Lake Erkcn by the acetylene reduction technique every 2 weeks during a period of 5 months. The diurnal cycles and vertical distribution of algae were also investigated. Fixation was correlated with the presence

NITROGEN FIXATION IN STREAMS IN

by Lisa A. Kunza, Robert O. Hall, Leslie Henry, Jacskon Hole Wy, Lisa A. Kunza, Robert Hall, Jr. Leslie Henry
"... Nitrogen fixation, the conversion of unreactive N2 gas from the atmosphere into a biologically usable form NH3, is the least studied process of the N cycle in stream ecology (Grimm and Petrone 1997). Tapping into the atmospheric N pool can only be accomplished naturally by N-fixers. These diazotroph ..."
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Nitrogen fixation, the conversion of unreactive N2 gas from the atmosphere into a biologically usable form NH3, is the least studied process of the N cycle in stream ecology (Grimm and Petrone 1997). Tapping into the atmospheric N pool can only be accomplished naturally by N

The horizontal heterogeneity of nitrogen fixation in

by Lake Valencia Venezuela, Suzanne N. Levine, William M. Lewis
"... on the basis of duplicate water samples collected from a depth of 0.5 m at 16 sites on 10 dates. The concentration of heterocysts in samples was determined and the samples were incubated with acetylene in situ. Two-way ANOVA was used to separate the variance associated with site (fixed spatial patch ..."
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patchiness), date (temporal variation), the interaction between site and date (ephemeral spatial patchiness), and sampling error. The nitrogen fixers in Lake Valencia are arranged in large (40-200 km2), ephemeral patches with distinctive fixation rates per heterocyst. Both variability in fixation per

Nitrogen fixation by Methanobacterium formicicum

by Francis S. S. Magingo, Claudius K. S Tumm , 1991
"... Methanobacterium formicicum utilized molecu-lar nitrogen as the sole nitrogen source for growth as monitored by methane production and culture turbidity measurements. The rate of methane production by the bacteria was correlated to ni-trogen gas concentrations. In the absence of ni-trogen gas or any ..."
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to fix molecular nitrogen. The above-mentioned species have been shown to possess nitrogen fixation (ni l) genes [4-6]. For Methanobacterium forrnicicum strain MS1 the presence of nil genes was proven [5], but the genes have yet to be shown to be expressed. This work was designed to demonstrate

Nitrogenase phylogeny and the molybdenum dependence of nitrogen fixation in Methanococcus maripaludis

by P S Kessler, J Mclarnan, J A Leigh, J. Bacteriol, Peter S. Kessler, Jennifer Mclarnan, John, A. Leigh - J , 1997
"... phylogeny and the molybdenum dependence of nitrogen fixation in ..."
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phylogeny and the molybdenum dependence of nitrogen fixation in

EFFECT OF FURADAN ON THE GROWTH AND NITROGEN FIXATION BY

by Muhammad Waliullah Talukdar, Blue Green Algae, M Z Islam, S Begum, H Ara, T M Waliullah , 2016
"... The study was carried out to determine the effects of pesticide on the growth and nitrogen fixation by blue green algae (BGA) that isolated from three different soils of Bangladesh viz., saline soil, calcareous soil and red soil. Furadan 5G, one of the most commonly used pesticides was selected for ..."
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The study was carried out to determine the effects of pesticide on the growth and nitrogen fixation by blue green algae (BGA) that isolated from three different soils of Bangladesh viz., saline soil, calcareous soil and red soil. Furadan 5G, one of the most commonly used pesticides was selected

EFFECT OF FURADAN ON THE GROWTH AND NITROGEN FIXATION BY

by Blue Green Algae, M Z Islam, S Begum, H Ara, T M Waliullah
"... The study was carried out to determine the effects of pesticide on the growth and nitrogen fixation by blue green algae (BGA) that isolated from three different soils of Bangladesh viz., saline soil, calcareous soil and red soil. Furadan 5G, one of the most commonly used pesticides was selected for ..."
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The study was carried out to determine the effects of pesticide on the growth and nitrogen fixation by blue green algae (BGA) that isolated from three different soils of Bangladesh viz., saline soil, calcareous soil and red soil. Furadan 5G, one of the most commonly used pesticides was selected

Molecular hydrogen and nitrogen fixation by Clostridium

by Eugene D. Rosenblum, P. W. Wilson - J. Bact , 1950
"... Although in recent years the mechanism of nitrogen fixation by Azotobacter and bythe symbiotic system of leguminousplantsplusRhizobium hasbeen studied in detail, similar investigations with Clostridium are few. This apparent neglect arises not only from the relative inconvenience of handling an anae ..."
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Although in recent years the mechanism of nitrogen fixation by Azotobacter and bythe symbiotic system of leguminousplantsplusRhizobium hasbeen studied in detail, similar investigations with Clostridium are few. This apparent neglect arises not only from the relative inconvenience of handling

Nitrogen Fixation in Denitrified Marine Waters

by Camila Fern, Laura Farías, Osvaldo Ulloa
"... Nitrogen fixation is an essential process that biologically transforms atmospheric dinitrogen gas to ammonia, therefore compensating for nitrogen losses occurring via denitrification and anammox. Currently, inputs and losses of nitrogen to the ocean resulting from these processes are thought to be s ..."
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Nitrogen fixation is an essential process that biologically transforms atmospheric dinitrogen gas to ammonia, therefore compensating for nitrogen losses occurring via denitrification and anammox. Currently, inputs and losses of nitrogen to the ocean resulting from these processes are thought
Results 1 - 10 of 1,353