ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Collection
Keywords
Publisher
Language
Years
  • 1
    Online Resource
    Online Resource
    Marine Nitrogen Fixation (2021)
    Cham :Springer International Publishing :
    Details
    Keywords: Water. ; Hydrology. ; Biogeography. ; Microbiology. ; Freshwater ecology. ; Marine ecology. ; Water. ; Biogeosciences. ; Microbiology. ; Freshwater and Marine Ecology.
    Description / Table of Contents: Chapter1: Nitrogen Fixation in the Marine Environment -- Chapter2: Fundamentals of N2 Fixation -- Chapter3: History of Research on Marine N2 Fixation -- Chapter4: Microorganisms and Habitats -- Chapter5: Measurements of Organism Abundances and Activities -- Chapter6: Factors Controlling N2 Fixation -- Chapter7: Biogeography of N2 Fixation in the Surface Ocean -- Chapter8: N2 Fixation in Ocean Basins -- Chapter9: Marine N2 Fixation, Global Change and the Future -- Chapter10: Summary and Conclusions.
    Abstract: This book aims to serve as a centralized reference document for students and researchers interested in aspects of marine nitrogen fixation. Although nitrogen is a critical element in both terrestrial and aquatic productivity, and nitrogen fixation is a key process that balances losses due to denitrification in both environments, most resources on the subject focuses on the biochemistry and microbiology of such processes and the organisms involved in the terrestrial environment on symbiosis in terrestrial systems, or on largely ecological aspects in the marine environment. This book is intended to provide an overview of N2 fixation research for marine researchers, while providing a reference on marine research for researchers in other fields, including terrestrial N2 fixation. This book bridges this knowledge gap for both specialists and non-experts, and provides an in-depth overview of the important aspects of nitrogen fixation as it relates to the marine environment. This resource will be useful for researchers in the specialized field, but also useful for scientists in other disciplines who are interested in the topic. It would provide a possible text for upper division classes or graduate seminars.
    Type of Medium: Online Resource
    Pages: XV, 186 p. 36 illus., 31 illus. in color. , online resource.
    Edition: 1st ed. 2021.
    ISBN: 9783030677466
    URL: https://doi.org/10.1007/978-3-030-67746-6
    DOI: 10.1007/978-3-030-67746-6
    DDC: 551.48
    Language: English
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    E-BOOKS (AWI ONLY)
  • 2
    Electronic Resource
    Electronic Resource
    Regulation of nitrogen-fixation by different nitrogen sources in the marine non-heterocystous cyanobacterium Trichodesmium sp. NIBB1067 (1991)
    Springer
    Archives of microbiology 156 (1991), S. 335-337 
    Details
    ISSN: 1432-072X
    Keywords: Cyanobacterium ; Trichodesmium ; Nitrogen-fixation ; Nitrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of various nitrogen sources on the synthesis and activity of nitrogenase was studied in the marine, non-heterocystous cyanobacterium Trichodesmium sp. NIBB1067 grown under defined culture conditions. Cells grown with N2 as the sole inorganic nitrogen source showed light-dependent nitrogenase activity (acetylene reduction). Nitrogenase activity in cells grown on N2 was not suppressed after 7 h incubation with 2 mM NaNO3 or 0.02 mM NH4Cl. However, after 3 h of exposure to 0.5 mM of urea, nitrogenase was inactivated. Cells grown in medium containing 2 mM NaNO3, 0.5 mM urea or 0.02 mM NH4Cl completely lacked the ability to reduce acetylene. Western immunoblots tested with polyclonal antisera against the Fe-protein and the Mo−Fe protein, revealed the following: (1) both the Fe-protein and the Mo−Fe protein were synthesized in cells grown with N2 as well as in cells grown with NaNO3 or low concentration of NH4Cl; (2) two bands (apparent molecular mass of 38 000 and 40 000) which cross-reacted with the antiserum to the Fe-protein, were found in nitrogen-fixing cells; (3) only one protein band, corresponding to the high molecular mass form of the Fe-protein, was found in cells grown with NaNO3 or low concentration of NH4Cl; (4) neither the Fe-protein nor the Mo−Fe protein was found in cells grown with urea; (5) the apparent molecular mass of the Fe-protein of Trichodesmium sp. NIBB1067 was about 5000 dalton higher than that of the heterocystous cyanobacterium, Anabaena cylindrica IAM-M1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248706
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Diel variability in transcription of the structural gene for glutamine synthetase (glnA) in natural populations of the marine diazotrophic cyanobacterium Trichodesmium thiebautii (1996)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 21 (1996), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract: A 360-bp fragment of the Trichodesmium thiebautii glutamine synthetase gene (glnA) was amplified from DNA isolated from oceanic populations of this ecologically important, diazotrophic cyanobacterium. The cloned fragment showed high homology to the type 1 glutamine synthetase (GS) enzymes of other cyanobacteria and was used to probe the in situ, temporal variability in transcription of Trichodesmium GS. Three distinct phases in the diel pattern of glnA mRNA abundance were observed. These appear to be correlated with the temporal variability in carbon and nitrogen fixation rates and the effect that these physiological processes have on the size of cellular pools of the primary end-products of N assimilation. Our data show that Trichodesmium thiebautii GS is regulated at the level of transcription and support the hypothesis that GS expression in this organism is subject to similar controls as those established for heterocyst-forming cyanobacteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6941.1996.tb00346.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Comparison of diazotroph community structure in Lyngbya sp. and Microcoleus chthonoplastes dominated microbial mats from Guerrero Negro, Baja, Mexico (2004)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 47 (2004), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The nitrogenase activity and phylogenetic diversity of nitrogen fixing microorganisms in several different cyanobacterial mat types from Guerrero Negro, Baja California, Mexico were investigated by acetylene reduction assay, and by amplification and sequencing of the nitrogenase nifH gene. Acetylene reduction assays performed on a Lyngbya sp. and two Microcoleus chthonoplastes dominated microbial mats showed a typical diel pattern of nitrogenase activity in these mats. The highest rates of activity were found at night, with 40 and 37 μmol C2H4 m−2 h−1 measured in the Microcoleus mats, and 9 μmol C2H4 m−2 h−1 in the Lyngbya mat. Nitrogenase sequences were obtained that clustered with sequences from cyanobacteria, γ-Proteobacteria, and cluster 3 of nifH. In addition, novel and divergent sequences were also recovered. The composition of nifH sequence types recovered differed between the Lyngbya and Microcoleus mats. Interestingly, nifH sequences belonging to filamentous cyanobacteria were absent in most mat samples even though both mats were dominated by filamentous cyanobacteria. nifH sequences clustering with those of unicellular cyanobacteria were found, some of which were virtually identical to the nifH sequence from Halothece sp. MPI96P605, which had previously been isolated from the mat. In manipulation experiments, the Lyngbya and Microcoleus mats were allowed to re-colonize a cleared surface. In these developing mats, nifH sequences not previously observed in the mats were discovered. Our results showed that organisms capable of N2 fixation were present in N2 fixing mats, that the composition of the N2 fixing communities differs between mats, and that filamentous cyanobacterial diazotrophs may not have a large role in the early stages of mat development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0168-6496(03)00301-5
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Structural analysis of the Trichodesmium nitrogenase iron protein: implications for aerobic nitrogen fixation activity (1997)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 153 (1997), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Trichodesmium spp. are marine filamentous nitrogen-fixing cyanobacteria which play an important role in the nitrogen budget of the open ocean. Trichodesmium is unique in that it is nonheterocystous and fixes nitrogen during the day, while evolving oxygen through photosynthesis, even though nitrogenase is sensitive to oxygen inactivation. The sequence of the gene encoding the Fe protein component of nitrogenase from the recently cultivated isolate Trichodesmium sp. IMS 101 was used to construct a 3-dimensional model of the Fe protein, by comparison to the X-ray crystallographic structure of the Fe protein of the γ-proteobacterium Azotobacter vinelandii. The primary differences in amino acid sequences of the Fe protein from diverse organisms do not impact the critical structural features of the Fe protein. It can be concluded that aerobic nitrogen fixation in Trichodesmium spp. is not facilitated by unique structural features of Trichodesmium Fe protein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1997.tb12589.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    High rates of N 2 fixation by unicellular diazotrophs in the oligotrophic Pacific Ocean (2004)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 430 (2004), S. 1027-1032 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The availability of nitrogen is important in regulating biological productivity in marine environments. Deepwater nitrate has long been considered the major source of new nitrogen supporting primary production in oligotrophic regions of the open ocean, but recent studies have showed that ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature02824
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Unicellular cyanobacteria fix N 2 in the subtropical North Pacific Ocean (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 412 (2001), S. 635-638 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fixed nitrogen (N) often limits the growth of organisms in terrestrial and aquatic biomes, and N availability has been important in controlling the CO2 balance of modern and ancient oceans. The fixation of atmospheric dinitrogen gas (N2) to ammonia is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35088063
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Are Recent Watershed Disturbances Associated with Temporal and Spatial Changes in Water Quality of Lake George, New York, USA? (1997)
    Springer
    Environmental management 21 (1997), S. 725-732 
    Details
    ISSN: 1432-1009
    Keywords: KEY WORDS: Repeated-measures ANOVA; Split-plot design; Lakewater chemistry; Lake George
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: a (Chl a), silica (Si), and chloride (Cl) through the use of proper statistical techniques. Results indicate no statistically significant changes in the concentrations of TP, Chl a, or Si in the spring or summer from 1981 to 1993. A significant temporal trend of increase in Cl concentration is, however, detected. This is perhaps the strongest evidence that the development of the Lake George watershed has affected lakewater chemistry. In spring, the concentrations of TP, Chl a, Si, and Cl, averaged over all 13 years, were higher in the south basin, but differences are not statistically significant (i.e., P 〉 0.05). In summer, Si was slightly but significantly lower, and Cl was nonsignificantly higher in the south basin. Significant interactions between temporal and spatial changes are detected based only on summer values of TP and Chl a, indicating differential trends of change for these two variables in the south and north basins during the last 13 years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002679900062
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Expression of photosynthesis genes in relation to nitrogen fixation in the diazotrophic filamentous nonheterocystous cyanobacterium Trichodesmium sp. IMS 101 (1999)
    Springer
    Plant molecular biology 41 (1999), S. 89-104 
    Details
    ISSN: 1573-5028
    Keywords: cyanobacteria ; circadian rhythm ; psaA ; psbA ; Trichodesmium sp.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The daily cycle of nitrogenase expression in the marine filamentous nonheterocystous cyanobacterium Trichodesmium spp. is controlled by a circadian rhythm. We evaluated the rhythm of two key photosynthesis genes, psbA of photosystem II and psaA of photosystem I, in Trichodesmium sp. IMS 101 using the 3 criteria for an endogenous rhythm. The transcript abundance of psbA and psaA transcripts oscillated with a period of ca. 24 h under a 12 h light/12 h dark regime. At 24 °C and 28 °C the cyclic pattern of transcript abundance was maintained for at least 58 h under constant light conditions, whereas the periods were about 24 h at 24 °C, and 26–30 h at the higher temperature. The cycles of psbA and psaA gene expression were entrained using light-dark cues. Transcription of nifHDK was initiated prior to the light period, followed by psbA and finally psaA. There was a 90° (6 h) phase difference between the net accumulation of nifHDK and psbA transcripts, as well as between that of psbA and psaA transcripts. Results of inhibitor experiments indicated that psbA and psaA transcription was regulated differently by initiation and degradation during the light period. Short-term changes of light conditions resulted in significant effects on psbA transcription and nitrogenase activity, but had less of an effect on psaA and nifHDK transcription.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006231805030
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Determinants of Summer Nitrate Concentration in a Set of Adirondack Lakes, New York (1999)
    Springer
    Water, air & soil pollution 111 (1999), S. 19-28 
    Details
    ISSN: 1573-2932
    Keywords: Adirondack region ; canonical discriminant analysis ; cluster analysis ; lake nitrate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Following reductions in the emission and deposition of sulfur compounds in the past decade, atmospheric deposition of nitrogen has become a focus of concern. Identification of watershed characteristics that mediate the effect of atmospheric nitrogen deposition can help evaluate the sensitivity of lakes to chronic and episodic nitrogen addition. Twenty four lakes in the southwestern portion of the Adirondack Park, New York, U.S.A., were classified into three N classes by cluster analysis of lakewater NO3- N concentration [N] during the summers of 1994–1996. The lake-N classes were best characterized as having (1) low [N] throughout the summer, (2) high [N] in early- but low [N] in late-summer, and (3) high [N] throughout the summer. The three lake-N classes were reconstructed perfectly by canonical discriminant analysis based mainly on lake average depth (AD), and lakewater concentrations of chlorophyll a [Chla] and SO4-S [S] in mid-summer. Increases in AD and [S], but decrease in [Chla] corresponded with a transition from low- to high-N classes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005006108629
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...