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  • Nature Publishing Group  (490)
  • Copernicus  (320)
  • PANGAEA
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  • 1
    Electronic Resource
    Electronic Resource
    Crystal structure of the streptococcal superantigen SPE-C: dimerization and zinc binding suggest a novel mode of interaction with MHC class II molecules (1997)
    [s.l.] : Nature Publishing Group
    Nature structural biology 4 (1997), S. 635-643 
    Details
    ISSN: 1072-8368
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Bacterial superantigens are small proteins that have a very potent stimulatory effect on T lymphocytes through their ability to bind to both MHC class II molecules and T-cell receptors. We have determined the three-dimensional structure of a Streptococcal superantigen, SPE-C, at 2.4 Å ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nsb0897-635
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Visual observation of lightning propagation (1986)
    [s.l.] : Nature Publishing Group
    Nature 322 (1986), S. 215-215 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR-Reliable scientific observers'3 have reported discerning direction of movement and propagation in long-duration horizontal lightning flashes. With measured velocities between 5.6 x 103 and 1.1 x 104 m s'1 for horizontal flashes4, lightning approaches the upper threshold for detection of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/322215a0
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  • 3
    Electronic Resource
    Electronic Resource
    Amino-acids in Nectar and their Evolutionary Significance (1973)
    [s.l.] : Nature Publishing Group
    Nature 241 (1973), S. 543-545 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This evidence of concern with amino-acid ingestion by adult insects usually thought of as restricted to a liquid diet suggests that nectar itself should be examined as a potential source. Some comprehensive analyses of honey (which contains additives provided by its makers, the honey T)ees), have ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/241543b0
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  • 4
    Electronic Resource
    Electronic Resource
    Apolactoferrin structure demonstrates ligand-induced conformational change in transferrins (1990)
    [s.l.] : Nature Publishing Group
    Nature 344 (1990), S. 784-787 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/344784a0
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  • 5
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    Measured Serengeti soil chemical properties including salinity and pH (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Keywords: Banagi; Conductivity; DEPTH, soil; Elevation of event; Event label; GDGTs; Kemarishe; Kirawira; Latitude of event; Longitude of event; Makoma; Malambo Road; MULT; Multiple investigations; Musabi; Naabi Hill; Ndabakal; Nyaruswiga; Optional event label; pH; Salinity; Sample code/label; Serengeti; Serengeti_soil_Banagi; Serengeti_soil_Kemarishe; Serengeti_soil_Kirawira; Serengeti_soil_Makoma; Serengeti_soil_Malambo_Road; Serengeti_soil_Musabi; Serengeti_soil_Naabi_Hill; Serengeti_soil_Ndabaka; Serengeti_soil_Nyaruswiga; Serengeti_soil_Shifting_Sands; Serengeti_soil_Simba_Kopjes; Shifting Sands; Simba Kopjes; Soil; Total dissolved solids
    Type: Dataset
    Format: text/tab-separated-values, 492 data points
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  • 6
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    Collection data of the new species Tedania (Tedaniopsis) rappi (Demospongiae, Poecilosclerida, Tedaniidae) (2020)
    PANGAEA
    Details
    Publication Date: 2023-02-24
    Description: We report the first records of the new species Tedania (Tedaniopsis) rappi (Demospongiae, Poecilosclerida, Tedaniidae) from the Orphan Seamount, between 2999.88 and 3449.629 m in depth.
    Keywords: Area/locality; Campaign; Code; Collection; Conductivity; DATE/TIME; Deep-sea Sponge Grounds Ecosystems of the North Atlantic; Depth, bottom/max; DEPTH, water; Device type; Discovery (2013); DY081; DY081_5; DY081_ROV327; Event label; Habitat; HUD2010-029; HUD2010-029_1340-3; Hudson; ICY-LAB; LATITUDE; LONGITUDE; Palancre; PAoM_1905_2183; Reference/source; Remote operated platform for oceanography; Remote operated vehicle; ROPOS; ROV; Salinity; San_Juan_Archipelago; Species; SponGES; Station label; Tartar_Strait; Temperature, water; Treatment; Type; Vessel
    Type: Dataset
    Format: text/tab-separated-values, 53 data points
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  • 7
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    United States Groundwater Chemistry - Dissolved Organic Carbon Model (2019)
    PANGAEA
    In:  Supplement to: McDonough, Liza K; Santos, Isaac R; Andersen, Martin; O'Carroll, Denis; Rutlidge, Helen; Meredith, Karina; Oudone, Phetdala; Baker, Andy (2018): Changes in global groundwater organic carbon driven by climate change and urbanization. EarthArXiv Preprints, 11 pp, https://doi.org/10.31223/osf.io/vmaku
    Details
    Publication Date: 2023-03-14
    Description: This data set is predominantly sourced from the National Water Quality Monitoring Council (https://www.waterqualitydata.us/portal) and contains water quality data for the United States as well as climate and other ancillary data. This data was used to develop a model to explain groundwater dissolved organic carbon concentrations in the manuscript "Changes in global groundwater organic carbon driven by climate change and urbanization". Units for variables are included in the file "Units for Variables". --- National Water Quality Monitoring Council water chemistry data (https://www.waterqualitydata.us/portal) was obtained from: Chapelle, F. H., Bradley, P. M., Journey, C. A., & McMahon, P. B. (2013). Assessing the Relative Bioavailability of DOC in Regional Groundwater Systems. Ground water 51(3), doi:10.1111/j.1745-6584.2012.00987.x. --- Water table depth data obtained from: Fan, Y., Li, H., & Miguez-Macho, G. (2013). Global patterns of groundwater table depth. Science, 339, 940–943, doi:10.1126/science.1229881. --- Climatic data obtained from www.worldclim.org: Hijmans, R. J., Cameron, S. E., Parra, J. L., Jones, P. G., & Jarvis, A. (2005). Very high resolution interpolated climate surfaces for global land areas. International Journal of Climatology, 25, 1965-1978, doi:10.1002/joc.1276. --- Land use data obtained from: Channan, S., Collins, K., & Emanuel, W. R. (2014). Global mosaics of the standard MODIS land cover type data. University of Maryland and the Pacific Northwest National Laboratory, College Park, Maryland, USA. Retrieved from University of Maryland and the Pacific Northwest National Laboratory. - Friedl, M. A., Sulla-Menasche, D., Tan, B., Schneider, A., Ramankutty, N., Sibley, A., & Huang, X. (n.d.). MODIS Collection 5 global land cover: Algorithm refinements and characterization of new datasets, 2001-2012. Collection 5.1 IGBP Land Cover. Boston University, Boston, MA, USA.
    Keywords: Age, comment; Alabama; Area/locality; Arkansas; Arsenic; Calcium; California; Carbon, organic, dissolved; Chloride; Colorado; Conductivity, electrical; Connecticut; Continent; Country; Delaware; Depth, groundwater table; Depth, well; ELEVATION; Event label; Florida; Fluoride; Georgia; Idaho; Illinois; Indiana; Iowa; Iron; Kansas; Land use; LATITUDE; Lithology/composition/facies; LONGITUDE; Louisiana; Magnesium; Manganese; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; MULT; Multiple investigations; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Number; Ohio; Oklahoma; Oxygen, dissolved; Pennsylvania; pH; Potassium; Precipitation, annual mean; Precipitation, mean; Precipitation of the driest month; Precipitation of the wettest month; Ratio; Sample ID; Silica, dissolved; Sodium; South Carolina; South Dakota; Sulfate; Temperature, annual range; Temperature, coldest month, minimum; Temperature, mean; Temperature, range daily; Temperature, warmest month, maximum; Temperature, water; Temperature, water, annual mean; Tennessee; Texas; United States; US-AL; US-AR; US-CA; US-CO; US-CT; US-DE; US-FL; US-GA; US-IA; US-ID; US-IL; US-IN; US-KS; US-LA; US-MA; US-MD; US-MI; US-MN; US-MO; US-MS; US-NC; US-ND; US-NE; US-NH; US-NJ; US-NM; US-NV; US-NY; US-OH; US-OK; US-PA; US-SC; US-SD; US-TN; US-TX; US-UT; US-VA; US-VT; US-WA; US-WI; US-WV; US-WY; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming
    Type: Dataset
    Format: text/tab-separated-values, 232522 data points
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  • 8
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    Geochemistry of tetrapyrrole, tetraterpenoid, and perylene pigments in sediments from the Gulf of California
    PANGAEA
    In:  Supplement to: Baker, Earl W; Louda, William (1982): Geochemistry of tetrapyrrole, tetraterpenoid, and perylene pigments in sediments from the Gulf of California: Deep Sea Drilling Project Leg 64, Sites 474, 477, 479, and 481, and Scripps Institution of Oceanography Guaymas Basin Survey Cruise Leg 3, Sites 10G and 18G. In: Curray, JR; Moore, DG; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 64, 789-814, https://doi.org/10.2973/dsdp.proc.64.125.1982
    Details
    Publication Date: 2023-05-12
    Description: Results and discussion cover pigment analyses of 36 sediment samples recovered by Deep Sea Drilling Project Leg 64, and six samples from the Leg 64 site-survey cruise in the Guaymas Basin (Scripps Institution of Oceanography, Leg 3). Pigments investigated were tetrapyrroles, tetraterpenoids, and the PAH compound perylene. Traces of mixed nickel and copper ETIO-porphyrins were ubiquitous in all sediment samples, except for the very surface (i.e., 〈2 m sub-bottom), and their presence is taken as an indication of minor influxes of previously oxidized allochthonous (terrestrial) organic matter. Phorbides and chlorins isolated from Site 479 sediment samples (i.e., the oxygen-minimum locale, northeast of the Guaymas Basin) well represent the reductive diagenesis ("Treibs Scheme"; see Baker and Palmer, 1978; Treibs, 1936) of chlorophyll derivatives. Three forms of pheophytin-a, plus a variety of phorbides, were found to give rise to freebase porphyrins, nickel phylloerythrin, and nickel porphyrins, with increasing depth of burial (increasing temperature). Sediments from Sites 481, 10G, and 18G yielded chlorophyll derivatives characteristic of early oxidative alterations. Included among these pigments are allomerized pheophytin-a, purpurin-18, and chlorin-p6. The high thermal gradient imposed upon the late Quaternary sediments of Site 477 greatly accelerated chlorophyll diagenesis in the adjacent overlying sediments, that is, the production of large quantities of free-base desoxophylloerythroetioporphyrin (DPEP) occurred in a section (477-7-5) presently only 49.8 meters sub-bottom. Present depth and age of these sediments are such that only chlorins and phorbides would be expected. Carotenoid (i.e., tetraterpenoids) concentrations were found to decrease rapidly with increasing sub-bottom depth. Less deeply buried sediments (e.g., 0-30 m) yielded mixtures of carotenes and oxygen-substituted carotenoids. Oxygencontaining (oxy-, oxo-, epoxy-) carotenoids were found to be lost preferentially with increased depth of burial. Early carotenoid diagenesis is suggested as involving interacting reductions and dehydrations whereby dehydro-, didehydro-, and retro-carotenes are generated. Destruction of carotenoids as pigments may involve oxidative cleavage of the isoprenoid chain through epoxy intermediates, akin to changes in the senescent cells of plants. Perylene was found to be a common component of the extractable organic matter from all sediments investigated. The generation of alkyl perylenes was found to parallel increases in the existing thermal regime at all sites. Igneous sills and sill complexes within the sediment profile of Site 481 altered (i.e., scrambled) the otherwise straightforward thermally induced alkylation of perylene. The degree of perylene alkylation is proposed as an indicator of geothermal stress for non-contemporaneous marine sediments.
    Keywords: Deep Sea Drilling Project; DSDP
    Type: Dataset
    Format: application/zip, 6 datasets
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  • 9
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    Age determination, uranium, carbon and oxygen isotopes ratios of a stalagmite of the Villars cave
    PANGAEA
    In:  Supplement to: Genty, Dominique; Blamart, Dominique; Ouahdi, R; Gilmour, M; Baker, A; Jouzel, Jean; Van-Exter, Sandra (2003): Precise dating of Dansgaard–Oeschger climate oscillations in western Europe from stalagmite data. Nature, 421, 833-837, https://doi.org/10.1038/nature01391
    Details
    Publication Date: 2023-05-12
    Description: The signature of Dansgaard-Oeschger events - millennial-scale abrupt climate oscillations during the last glacial period - is well established in ice cores and marine records (Labeyrie, 2000, doi:10.1126/science.290.5498.1905; Blunier and Brook, 2001, doi:10.1126/science.291.5501.109: Bond et al., 2001, doi:10.1126/science.1065680). But the effects of such events in continental settings are not as clear, and their absolute chronology is uncertain beyond the limit of 14C dating and annual layer counting for marine records and ice cores, respectively. Here we present carbon and oxygen isotope records from a stalagmite collected in southwest France which have been precisely dated using 234U/230Th ratios. We find rapid climate oscillations coincident with the established Dansgaard-Oeschger events between 83,000 and 32,000 years ago in both isotope records. The oxygen isotope signature is similar to a record from Soreq cave, Israel (Bar-Mathews et al., 2000, doi:10.1016/S0009-2541(99)00232-6), and deep-sea records (Bond et al., 1993, doi:10.1038/365143a0; Shackleton and Hall, 2001, doi:10.1029/2000PA000513), indicating the large spatial scale of the climate oscillations. The signal in the carbon isotopes gives evidence of drastic and rapid vegetation changes in western Europe, an important site in human cultural evolution. We also find evidence for a long phase of extremely cold climate in southwest France between 61.2 +/-0.6 and 67.4 0.9 kyr ago.
    Keywords: France; HAND; Sampling by hand; Villars cave stalagmite 9; Vil-stm09
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    Format: application/zip, 3 datasets
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  • 10
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    Ages and stable isotope ratios from speleothem calcite from Cold Water Cave, Iowa (2008)
    PANGAEA
    In:  Supplement to: Dorale, Jeffrey A; González, Luis A; Reagan, Mark K; Pickett, David A; Murrell, Michael T; Baker, Richard G (1992): A high-resolution record of Holocene climate change in speleothem calcite from Cold Water Cave, Northeast Iowa. Science, 258(5088), 1626-1630, https://doi.org/10.1126/science.258.5088.1626
    Details
    Publication Date: 2023-01-13
    Description: High-precision uranium-thorium mass spectrometric chronology and 18O-13C isotopic analysis of speleothem calcite from Cold Water Cave in northeast Iowa have been used to chart mid-Holocene climate change. Significant shifts in d18O and d13C isotopic values coincide with well-documented Holocene vegetation changes. Temperature estimates based on 18O/16O ratios suggest that the climate warmed rapidly by about 3°C at 5900 years before present and then cooled by 4°C at 3600 years before present. Initiation of a gradual increase in ?d13C at 5900 years before present suggests that turnover of the forest soil biomass was slow and that equilibrium with prairie vegetation was not attained by 3600 years before present.
    Keywords: Cold_Water_Cave; HAND; Iowa, USA; Sampling by hand
    Type: Dataset
    Format: application/zip, 2 datasets
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