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
  • 1
    facet.materialart.
    Unknown
    Forest soil carbon oxidation state and oxidative ratio increase in response to elevated CO2 (2015)
    Wiley
    Details
    Publication Date: 2015-08-13
    Description: The oxidative ratio (OR) of the biosphere is the stoichiometric ratio (O 2 /CO 2 ) of gas exchange by photosynthesis and respiration—a key parameter in budgeting calculations of the land and ocean carbon sinks. Carbon cycle-climate feedbacks could alter the OR of the biosphere by affecting the quantity and quality of organic matter in plant biomass and soil carbon pools. This study considers the effect of elevated atmospheric carbon dioxide concentrations ([CO 2 ]) on the OR of a hardwood forest after 9 growing seasons of free-air CO 2 -enrichment (FACE). We measured changes in the carbon oxidation state (C ox ) of biomass and soil carbon pools as a proxy for the ecosystem OR. The OR of net primary production, 1.039, was not affected by elevated [CO 2 ]. However, the C ox of the soil carbon pool was 40% higher at elevated [CO 2 ], and the estimated OR values for soil respiration increased from 1.006 at ambient [CO 2 ] to 1.054 at elevated [CO 2 ]. A biochemical inventory of the soil organic matter ascribed the increases in C ox and OR to faster turnover of reduced substrates, lignin and lipids, at elevated [CO 2 ]. This implicates the heterotrophic soil community response to elevated [CO 2 ] as a driver of disequilibrium in the ecosystem OR. The oxidation of soil carbon pool constitutes an unexpected terrestrial O 2 sink. Carbon budgets constructed under the assumption of OR equilibrium would equate such a terrestrial O 2 sink to CO 2 uptake by the ocean. The potential for climate-driven disequilibrium in the cycling of O 2 and CO 2 in the terrestrial biosphere warrants further investigation.
    Print ISSN: 0148-0227
    Topics: Biology , Geosciences
    Published by Wiley on behalf of American Geophysical Union (AGU).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    The rare earth element signal in Archaean microbial carbonate: information on ocean redox and biogenicity (2014)
    Geological Society of London
    Details
    Publication Date: 2014-11-07
    Description: Microbial carbonates contain valuable chemical, isotopic and molecular information regarding the Precambrian Earth. They record shallow-water information complementary to deep ocean proxies, such as banded iron formation and black shale. Six groups of well-preserved stromatolites illustrate how the rare earth elements (REE) are used for chemical investigation. The first task is to test whether the REE inventory of carbonate is compromised by clastic, volcanic, or diagenetic contaminants. Once the cleanliness has been verified, the shale-normalized REE pattern can be used to distinguish between marine and lacustrine settings. For marine carbonates, it is possible to distinguish between restricted basin and open marine settings and for thick platform limestones the relative water depth can be inferred from REE systematics. The studied shallow-water stromatolites range in age from 2.52 to 3.45 Ga. They contain no evidence from the behaviour of the redox-sensitive element cerium that free oxygen levels in the shallow sea approached concentrations beyond a trace gas by 2.52 Ga. Compared with abiotic early diagenetic marine carbonate cements, microbial carbonate is strongly enriched in REE. This may itself not yet serve as a biomarker, but it is regarded as a necessary prerequisite for a sample to qualify for biomarker studies.
    Print ISSN: 0016-7649
    Topics: Geosciences
    Published by Geological Society of London
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Construction of a Natural Mucin Microarray and Interrogation for Biologically Relevant Glyco-Epitopes (2012)
    American Chemical Society (ACS)
    Details
    Publication Date: 2012-03-15
    Description: Analytical Chemistry DOI: 10.1021/ac203404n
    Print ISSN: 0003-2700
    Electronic ISSN: 1520-6882
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Filamentary star formation in NGC 1275 (2014)
    Oxford University Press
    Details
    Publication Date: 2014-08-16
    Description: We examine the star formation in the outer halo of NGC 1275, the central galaxy in the Perseus cluster (Abell 426), using far-ultraviolet and optical images obtained with the Hubble Space Telescope . We have identified a population of very young, compact star clusters with typical ages of a few Myr. The star clusters are organized on multiple kiloparsec scales. Many of these star clusters are associated with ‘streaks’ of young stars, the combination of which has a cometary appearance. We perform photometry on the star clusters and diffuse stellar streaks, and fit their spectral energy distributions to obtain ages and masses. These young stellar populations appear to be normal in terms of their masses, luminosities and cluster formation efficiency; 〈10 per cent of the young stellar mass is located in star clusters. Our data suggest star formation is associated with the evolution of some of the giant gas filaments in NGC 1275 that become gravitationally unstable on reaching and possibly stalling in the outer galaxy. The stellar streaks then could represent stars moving on ballistic orbits in the potential well of the galaxy cluster. We propose a model where star-forming filaments, switched on ~50 Myr ago and are currently feeding the growth of the NGC 1275 stellar halo at a rate of –2 to 3 M  yr –1 . This type of process may also build stellar haloes and form isolated star clusters in the outskirts of youthful galaxies.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
    Published by Oxford University Press
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    Jun turnover is controlled through JNK-dependent phosphorylation of the E3 ligase Itch (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-09-11
    Description: The turnover of Jun proteins, like that of other transcription factors, is regulated through ubiquitin-dependent proteolysis. Usually, such processes are regulated by extracellular stimuli through phosphorylation of the target protein, which allows recognition by F box-containing E3 ubiquitin ligases. In the case of c-Jun and JunB, we found that extracellular stimuli also modulate protein turnover by regulating the activity of an E3 ligase by means of its phosphorylation. Activation of the Jun amino-terminal kinase (JNK) mitogen-activated protein kinase cascade after T cell stimulation accelerated degradation of c-Jun and JunB through phosphorylation-dependent activation of the E3 ligase Itch. This pathway modulates cytokine production by effector T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gao, Min -- Labuda, Tord -- Xia, Ying -- Gallagher, Ewen -- Fang, Deyu -- Liu, Yun-Cai -- Karin, Michael -- AI43477/AI/NIAID NIH HHS/ -- ES04151/ES/NIEHS NIH HHS/ -- ES06376/ES/NIEHS NIH HHS/ -- R21AI48542/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2004 Oct 8;306(5694):271-5. Epub 2004 Sep 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0723, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15358865" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD28/immunology ; CD4-Positive T-Lymphocytes/immunology/*metabolism ; Interferon-gamma/metabolism ; Interleukins/metabolism ; Lymphocyte Activation ; *MAP Kinase Kinase Kinase 1 ; MAP Kinase Kinase Kinases/genetics/metabolism ; Mice ; Mitogen-Activated Protein Kinase 8 ; Mitogen-Activated Protein Kinase 9 ; Mitogen-Activated Protein Kinases/*metabolism ; Phosphorylation ; Proto-Oncogene Proteins c-jun/genetics/*metabolism ; RNA, Messenger/genetics/metabolism ; Receptors, Antigen, T-Cell/immunology ; Recombinant Fusion Proteins/metabolism ; T-Lymphocytes/immunology/*metabolism ; Th2 Cells/cytology/immunology/metabolism ; Ubiquitin/metabolism ; Ubiquitin-Protein Ligases/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Essential cytoplasmic translocation of a cytokine receptor-assembled signaling complex (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-07-19
    Description: Cytokine signaling is thought to require assembly of multicomponent signaling complexes at cytoplasmic segments of membrane-embedded receptors, in which receptor-proximal protein kinases are activated. Indeed, CD40, a tumor necrosis factor receptor (TNFR) family member, forms a complex containing adaptor molecules TRAF2 and TRAF3, ubiquitin-conjugating enzyme Ubc13, cellular inhibitor of apoptosis proteins 1 and 2 (c-IAP1/2), IkappaB kinase regulatory subunit IKKgamma (also called NEMO), and mitogen-activated protein kinase (MAPK) kinase kinase MEKK1 upon ligation. TRAF2, Ubc13, and IKKgamma were required for complex assembly and activation of MEKK1 and MAPK cascades. However, these kinases were not activated unless the multicomponent signaling complex translocated from CD40 to the cytosol upon c-IAP1/2-induced degradation of TRAF3. This two-stage signaling mechanism may apply to other innate immune receptors, accounting for spatial and temporal separation of MAPK and IKK signaling.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2669719/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2669719/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matsuzawa, Atsushi -- Tseng, Ping-Hui -- Vallabhapurapu, Sivakumar -- Luo, Jun-Li -- Zhang, Weizhou -- Wang, Haopeng -- Vignali, Dario A A -- Gallagher, Ewen -- Karin, Michael -- AI043477/AI/NIAID NIH HHS/ -- AI52199/AI/NIAID NIH HHS/ -- CA21765/CA/NCI NIH HHS/ -- R01 AI043477/AI/NIAID NIH HHS/ -- R01 AI043477-12/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2008 Aug 1;321(5889):663-8. doi: 10.1126/science.1157340. Epub 2008 Jul 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0723, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18635759" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD40/*metabolism ; B-Lymphocytes/immunology/*metabolism ; Cell Membrane/metabolism ; Cytoplasm/*metabolism ; Enzyme Activation ; I-kappa B Kinase/metabolism ; Inhibitor of Apoptosis Proteins/metabolism ; *Lymphocyte Activation ; MAP Kinase Kinase Kinase 1/metabolism ; MAP Kinase Kinase Kinases/metabolism ; *MAP Kinase Signaling System ; Mice ; Proteasome Endopeptidase Complex/metabolism ; *Signal Transduction ; TNF Receptor-Associated Factor 2/metabolism ; TNF Receptor-Associated Factor 3/metabolism ; TNF Receptor-Associated Factor 6/metabolism ; Ubiquitin-Conjugating Enzymes/metabolism ; Ubiquitination
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    Plant species, not climate, controls aboveground biomass O2:CO2 exchange ratios in deciduous and coniferous ecosystems (2017)
    Wiley
    Details
    Publication Date: 2017-08-17
    Description: The oxidative ratio (OR) is the ratio of O 2 :CO 2 associated with photosynthesis, respiration, and other ecosystem gas exchange processes, and can be reported on the scale of an individual leaf, an ecosystem, up to the entire terrestrial biosphere. The OR of the terrestrial biosphere is used to partition anthropogenic CO 2 between oceanic and terrestrial carbon sinks, and the ease of measurement of this property on smaller scales suggests its potential for other uses. However, controls on the natural variation of OR are not understood in either organic matter pools or fluxes, and this lack of basic information limits the use of the tracer. Here we assess the annual variability of the OR of photosynthesis over ~decade for two temperate forests, one coniferous and one deciduous, and show that the photosynthetic OR signature is strongly dominated by plant species. We determined the OR of this flux by measuring the OR of carbon pools that close on annual or shorter timescales (leaves and individual tree rings), via solid-state 13 C NMR spectroscopy and elemental analysis. Leaf litter OR is different between coniferous and deciduous forests, but tree bole OR is constant between species. There was no significant change in leaf litter OR with time, nor any correlations between leaf litter OR and temperature or precipitation. During this time growing season precipitation varied by 95% from the time period average, and growing season temperature by 22%, demonstrating that on the decadal scale photosynthetic OR is invariant over significant shifts in these climate parameters.
    Print ISSN: 0148-0227
    Topics: Biology , Geosciences
    Published by Wiley on behalf of American Geophysical Union (AGU).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Lysosomotropism depends on glucose: a chloroquine resistance mechanism (2017)
    Springer Nature
    Details
    Publication Date: 2017-08-25
    Description: Lysosomotropism depends on glucose: a chloroquine resistance mechanism Cell Death and Disease 8, e3014 (August 2017). doi:10.1038/cddis.2017.416 Authors: Laura E Gallagher, Ohood A Radhi, Mahmud O Abdullah, Anthony G McCluskey, Marie Boyd & Edmond Y W Chan
    Electronic ISSN: 2041-4889
    Topics: Biology , Medicine
    Published by Springer Nature
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    Catalytic coal gasification: an emerging technology (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-01-08
    Description: Catalytic coal gasification is being developed as a more efficient and less costly approach to producing methane from coal. With a potassium catalyst all the reactions can take place at one temperature, so that endothermic and exothermic reactions can be integrated in a single reactor. A key aspect of the concept involves continuous recycling of product carbon monoxide and hydrogen to the gasifier following separation of methane. Development of the process has advanced steadily since the basic concept was proposed in 1971. A 23-day demonstration run was recently completed in a process development unit with a coal feed rate of 1 ton per day. The next major step in the program will be to design and construct a large pilot plant to bring the technology to commercial readiness in the late 1980's.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hirsch, R L -- Gallagher, J E Jr -- Lessard, R R -- Wesslhoft, R D -- New York, N.Y. -- Science. 1982 Jan 8;215(4529):121-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17839527" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Magnetic resonance imaging of renal necrosis [Medical Sciences] (2012)
    National Academy of Sciences
    Details
    Publication Date: 2012-08-15
    Description: Acute kidney injury (AKI) is a common and important medical problem, affecting 10% of hospitalized patients, and it is associated with significant morbidity and mortality. The most frequent cause of AKI is acute tubular necrosis (ATN). Current imaging techniques and biomarkers do not allow ATN to be reliably differentiated from...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...