Relevant bibliographies by topics / Nitrogen Nitrogen-fixing microorganisms. Klebsiella pneumoniae

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Academic literature on the topic 'Nitrogen Nitrogen-fixing microorganisms. Klebsiella pneumoniae'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Nitrogen Nitrogen-fixing microorganisms. Klebsiella pneumoniae"

1

Lawal, I., and I. Yusuf. "Physicochemical and Characterization of Nitrogen Fixing Bacteria from Soil Samples Within the Vicinity of Telecommunication Mast (Site No: 000148) Located at Karfi Town Kura Local Government, Kano State." UMYU Journal of Microbiology Research (UJMR) 6, no. 1 (June 30, 2021): 77–85. http://dx.doi.org/10.47430/ujmr.2161.010.

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The telecommunication mast associated-radiation is one of the primary factors influencing the way in which microorganisms interact with ecosystem. This study aims to assess the physicochemical and non-symbiotic nitrogen fixing bacteria (NNFB) from soil samples within the vicinity of telecommunication mast located at Karfi town Kura local government Kano state. Soil samples A, B, and C were collected within the vicinity of the mast at an interval of 10 meters, 20 meters and 30 meters from the mast respectively and control sample (D) was collected from location *(outside the vicinity of the mast)*. Physicochemical parameters of the soil samples were analyzed, isolation and identification of non-symbiotic nitrogen fixing bacteria were carried out using standard procedures. Samples B showed higher values of pH (8.02), phosphorus (23.95mg/kg), organic carbon (1.45%), nitrogen (0.28%) and organic matter content (2.50%) while control sample (D) showed lower values with 6.24, 2.77mg/kg, 0.41%, 0.07% and 0.71% of pH, phosphorus, organic carbon, nitrogen and organic matter content respectively. However, the moisture content(0.21%) of control sample is higher than that of sample A and B with 0.12% and 0.11% respectively The mean count of NNFB of the soil samples were 3.20 ± 0.06, 1.80± 0.12, 1.40±0.23, 1.20±0.20 for sample B, C, A and D respectively. Total of 14 isolates of the species Azomonas agilis 1(7.14%), Azotomonas insolita 1(7.14%), Bacillus megaterium 2(14.28 %), Bacillus azotoformans 1(7.14%), Bacillus mycoides 3(21.42%), Enterobacter cloacae 3(21.42%), and Klebsiella pneumonia 3(21.42%) were obtained. This indicates that the electromagnetic radiation from the mast has no effect on soil physicochemical parameters as well as non symbiotic nitrogen fixing bacteria proliferation. Key words: Non symbiotic Bacteria, telecommunication mast
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2

Berman, Donald, Robert Sullivan, and Christon J. Hurst. "Effect of the method of preparing monochloramine upon inactivation of MS2 coliphage, Escherichia coli, and Klebsiella pneumoniae." Canadian Journal of Microbiology 38, no. 1 (January 1, 1992): 28–33. http://dx.doi.org/10.1139/m92-004.

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Monochloramine prepared in situ by first adding chlorine to a suspension of microorganisms, followed by subsequent addition of ammonia, inactivated the MS2 coliphage more rapidly than did exposure of phage to monochloramine prepared either by adding chlorine to ammonia or by adding chlorine and ammonia simultaneously. The rapid viral inactivation was apparently due to the exposure of MS2 to free chlorine before the addition of ammonia. The average 99% CT value of MS2 when exposed to free chlorine was 1.3 and 1.1 at 5 and 15 °C, respectively. The average 99% CT values of MS2 briefly exposed to the combined action of free chlorine followed by the addition of ammonia to form monochloramine in situ were 19.3 and 1.5 at 5 and 15 °C, respectively. No 99% CT values were calculated for the inactivation of MS2 with preformed monochloramine because less than 1 log (90%) of inactivation occurred during a 4-h contact time. Inactivation of MS2 by monochloramine was more rapid at 15 than at 5 °C and when the chlorine to nitrogen weight ratio was 5:1 compared with 3:1. Monochloramine was a more efficient inactivating agent for the coliforms Escherichia coli and Klebsiella pneumoniae than it was for the MS2 coliphage. Key words: chlorine, monochloramine, virus, bacteria, disinfection.
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3

Mpongwana, Ncumisa, Seteno K. O. Ntwampe, Elizabeth I. Omodanisi, Boredi S. Chidi, and Lovasoa C. Razanamahandry. "Sustainable Approach to Eradicate the Inhibitory Effect of Free-Cyanide on Simultaneous Nitrification and Aerobic Denitrification during Wastewater Treatment." Sustainability 11, no. 21 (November 5, 2019): 6180. http://dx.doi.org/10.3390/su11216180.

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Simultaneous nitrification and aerobic denitrification (SNaD) is a preferred method for single stage total nitrogen (TN) removal, which was recently proposed to improve wastewater treatment plant design. However, SNaD processes are prone to inhibition by toxicant loading with free cyanide (FCN) possessing the highest inhibitory effect on such processes, rendering these processes ineffective. Despite the best efforts of regulators to limit toxicant disposal into municipal wastewater sewage systems (MWSSs), FCN still enters MWSSs through various pathways; hence, it has been suggested that FCN resistant or tolerant microorganisms be utilized for processes such as SNaD. To mitigate toxicant loading, organisms in SNaD have been observed to adopt a diauxic growth strategy to sequentially degrade FCN during primary growth and subsequently degrade TN during the secondary growth phase. However, FCN degrading microorganisms are not widely used for SNaD in MWSSs due to inadequate application of suitable microorganisms (Chromobacterium violaceum, Pseudomonas aeruginosa, Thiobacillus denitrificans, Rhodospirillum palustris, Klebsiella pneumoniae, and Alcaligenes faecalis) commonly used in single-stage SNaD. This review expatiates the biological remedial strategy to limit the inhibition of SNaD by FCN through the use of FCN degrading or resistant microorganisms. The use of FCN degrading or resistant microorganisms for SNaD is a cost-effective method compared to the use of other methods of FCN removal prior to TN removal, as they involve multi-stage systems (as currently observed in MWSSs). The use of FCN degrading microorganisms, particularly when used as a consortium, presents a promising and sustainable resolution to mitigate inhibitory effects of FCN in SNaD.
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4

Iniguez, A. Leonardo, Yuemei Dong, and Eric W. Triplett. "Nitrogen Fixation in Wheat Provided by Klebsiella pneumoniae 342." Molecular Plant-Microbe Interactions® 17, no. 10 (October 2004): 1078–85. http://dx.doi.org/10.1094/mpmi.2004.17.10.1078.

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In this report, all of the criteria necessary for the demonstration of nitrogen fixation in wheat (Triticum aestivum L.), the world's most important crop, are shown upon inoculation with a nitrogen-fixing bacterium, Klebsiella pneumoniae 342 (Kp342). Kp342 relieved nitrogen (N) deficiency symptoms and increased total N and N concentration in the plant. Nitrogen fixation was confirmed by 15N isotope dilution in the plant tissue and in a plant product, chlorophyll. All of these observations were in contrast to uninoculated plants, plants inoculated with a nitrogen-fixing mutant of Kp342, and plants inoculated with dead Kp342 cells. Nitrogenase reductase was produced by Kp342 in the intercellular space of the root cortex. Wild-type Kp342 and the nifH mutant colonized the interior of wheat roots in equal numbers on a fresh weight basis. The nitrogen fixation phenotype described here was specific to cv. Trenton. Inoculation of cvs. Russ or Stoa with Kp342 resulted in no relief of nitrogen deficiency symptoms.
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5

Machray, G. C., and W. D. P. Stewart. "Genetics of plant-microbe nitrogen-fixing symbiosis." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 85, no. 3-4 (1985): 239–52. http://dx.doi.org/10.1017/s0269727000004048.

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SynopsisA wide variety of plant-microbe nitrogen-fixing symbioses which include cyanobacteria as the nitrogenfixing partner exist. While some information has been gathered on the biochemical changes in the cyanobacterium upon entering into symbiosis, very little is known about the accompanying changes at the genetic level. Much of our present knowledge of the organisation and control of expression of nitrogenfixation (nif) genes is derived from studies of the free-living diazotroph Klebsiella pneumoniae. This organism thus provides a model system and source of experimental material for the genetic analysis of symbiotic nitrogen fixation. We describe the use of cloned K. pneumoniae genes for nitrogen fixation and its regulation in the genetic analysis' of nitrogen fixation in cyanobacteria which can enter into symbiosis with plants. These studies reveal some dissimilarities in the organisation of nif genes and raise questions as to the genetic control of nitrogen fixation in symbiosis.
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6

Jacob, G. S., J. Schaefer, J. R. Garbow, and E. O. Stejskal. "Solid-state NMR studies of Klebsiella pneumoniae grown under nitrogen-fixing conditions." Journal of Biological Chemistry 262, no. 1 (January 1987): 254–59. http://dx.doi.org/10.1016/s0021-9258(19)75919-5.

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7

Milenkov, M., R. Thummer, J. Gloer, J. Grotzinger, S. Jung, and R. A. Schmitz. "Insights into Membrane Association of Klebsiella pneumoniae NifL under Nitrogen-Fixing Conditions from Mutational Analysis." Journal of Bacteriology 193, no. 3 (November 5, 2010): 695–705. http://dx.doi.org/10.1128/jb.00775-10.

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8

Doolittle, Mark, Ashok Raina, Alan Lax, and Raj Boopathy. "Presence of nitrogen fixing Klebsiella pneumoniae in the gut of the Formosan subterranean termite (Coptotermes formosanus)." Bioresource Technology 99, no. 8 (May 2008): 3297–300. http://dx.doi.org/10.1016/j.biortech.2007.07.013.

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9

Brostedt, E., and S. Nordlund. "Purification and partial characterization of a pyruvate oxidoreductase from the photosynthetic bacterium Rhodospirillum rubrum grown under nitrogen-fixing conditions." Biochemical Journal 279, no. 1 (October 1, 1991): 155–58. http://dx.doi.org/10.1042/bj2790155.

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A pyruvate oxidoreductase with the capacity to support pyruvate-dependent nitrogenase activity in vitro has been purified from the photosynthetic bacterium Rhodospirillum rubrum. The enzyme requires CoA for activity and is irreversibly inactivated by oxygen. The molecular properties and Km values for the substrates have been studied. In supporting nitrogenase activity addition of ferredoxin is required. Overall the enzyme is similar to the nif-specific pyruvate: flavodoxin oxidoreductase purified from Klebsiella pneumoniae.
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10

Jones, K., and S. B. Bradshaw. "Biofilm formation by the Enterobacteriaceae: a comparison between Salmonella enteritidis, Escherichia coli and a nitrogen-fixing strain of Klebsiella pneumoniae." Journal of Applied Bacteriology 80, no. 4 (April 1996): 458–64. http://dx.doi.org/10.1111/j.1365-2672.1996.tb03243.x.

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