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  • 2015-2019
  • 2010-2014
  • 2000-2004  (37)
  • 1960-1964
  • 2004  (37)
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  • 2015-2019
  • 2010-2014
  • 2000-2004  (37)
  • 1960-1964
Year
  • 1
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    (Table 3) Identified diatoms in sediments of Terrasovoje, Radok and Beaver lakes, Amery Oasis, East Antarctica (2004)
    PANGAEA
    Details
    Publication Date: 2023-07-10
    Keywords: AmeryOasis2001/2002; Amphora pediculus; Amphora veneta; Antarctica; Aulacoseira cf. subarctica; Craticula cf. molesta; Cyclotella cf. distinguenda; Cyclotella cf. distinguenda var. unipunctata; Cyclotella sp.; Date/Time of event; Diadesmis cf. ingeae; Diadesmis cf. perpusilla; Diadesmis sp.; Eunotia cf. naegelii; Eunotia incisa; Event label; Fragilaria capucina var. rumpens; Fragilaria capucina var. vaucheriae; Fragilaria tenera; Frustulia rhomboides; Hantzschia cf. amphioxys; Hantzschia sp.; Latitude of event; Longitude of event; Luticola muticopsis; Meridion circulare var. constrictum; Muelleria peraustralis; MULT; Multiple investigations; Nitzschia commutata; Nitzschia frustulum; Pinnularia borealis var. rectangularis; Pinnularia cymatopleura; Pinnularia viridiformis; Pinnularia viridiformis var. minor; Psammothidium metakryophilum; Psammothidium stauroneioides; Radok_Lake; Sampling/drilling in lake; Stauroneis anceps; Staurosira venter; Staurosirella pinnata; Tabellaria fenestrata; Tabellaria flocculosa; Terrasovoje_Lake
    Type: Dataset
    Format: text/tab-separated-values, 68 data points
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  • 2
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    Radiocarbon ages of sediment core PG1414-2 from Beall Lake, Windmill Islands (2004)
    PANGAEA
    In:  Supplement to: Roberts, Donna; McMinn, Andrew; Cremer, Holger; Gore, Damian B; Melles, Martin (2004): The Holocene evolution and palaeosalinity history of Beall Lake, Windmill Islands (East Antarctica) using an expanded diatom-based weighted averaging model. Palaeogeography, Palaeoclimatology, Palaeoecology, 208(1-2), 121-140, https://doi.org/10.1016/j.palaeo.2004.02.032
    Details
    Publication Date: 2023-10-28
    Description: A mid-Holocene climate optimum is inferred from a palaeosalinity reconstruction of a closed saline lake (Beall Lake) from the Windmill Islands, East Antarctica using an expanded diatom salinity weighted averaging (WA) regression and calibration model. The addition of 14 lakes and ponds from the Windmill Islands, East Antarctica, to an existing weighted averaging regression and calibration palaeosalinity model of 33 lakes from the Vestfold Hills, East Antarctica expands the number of taxa and lakes and the range of salinity in the existing model and improves the model's predictive ability. This improved model was used to infer Holocene changes in lake water salinity in Beall Lake, Windmill Islands. Six changes in diatom-inferred salinity in Beall Lake are put into broad chronological context based on three radiocarbon dates: as the East Antarctic Ice Sheet (EAIS) retreated from the Windmill Islands during the early Holocene (~9000-8130 corr. yr BP), Beall Lake formed as a melt water-fed freshwater lake, which gradually became more saline as marine influence increased from ~8000 corr. yr BP. Between ~8000 and 4800 corr. yr BP, the diatom assemblage included planktonic marine taxa such as Chaetoceros spp. and cryophilic taxa such as Fragilariopsis cylindrus, which indicate favourable summer growth conditions. A mid-Holocene warm period produced a climate that was warmer and more humid with increased precipitation and snow accumulation. This is reflected in the Beall Lake core as a reduction in the salinity of the lake diatom assemblage from ~4800-4600 corr. yr BP. Holocene isostatic uplift rates in the Windmill Islands vary from 5-6 m/1000 yr. By applying this uplift rate, it is calculated that the bedrock would have risen above sea level by ~4000 yr BP. The Beall Lake core diatom assemblage from ~4600-2900 corr. yr BP includes both marine cryophilic and planktonic taxa together with freshwater benthic and planktonic lacustrine taxa. This mix of species indicates the emergence of the lake from the sea around ~4600 corr. yr BP. From ~2800 corr. yr BP, retreat of the ice margin led to increasing melt water inputs and associated freshening of the lake basin until ~1900 corr. yr BP. The lake basin had no oceanic influence by this time, allowing a terrestrial freshwater flora to establish and thrive for the next ~1000 yr. At ~1850 corr. yr BP, a sudden and rapid salinity change is evident in Beall Lake. A late Holocene warm period between 2000 and 1000 yr BP has been observed in ice core records from Law Dome (an ice cap abutting the Windmill Islands to the east and north). It is therefore inferred that, at ~1850 corr. yr BP, summer temperatures within the Beall Lake catchment area were much higher than present summer temperatures. The climate optimum identified in the Beall Lake core ~4800 yr BP confirms mid-Holocene warming of the Windmill Islands and suggests a synchronous mid-Holocene climate optimum occurred across coastal East Antarctica. In addition, the abrupt climate change inferred at ~1850 yr BP suggests that higher resolution sampling of sediment cores from coastal East Antarctic limnological oases will provide more evidence of rapid climate change events over coastal East Antarctica in future.
    Keywords: Beall Lake; Casey; Hand push corer; HSR; PG1414-2; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SPP1158; WindmillIslands1998
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 3
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    Water chemistry and diatom occurrences in sediments of Terrasovoje, Radok and Beaver Lake, Amery Oasis, East Antarctica (2004)
    PANGAEA
    In:  Supplement to: Cremer, Holger; Gore, Damian B; Hultzsch, Nadja; Melles, Martin; Wagner, Bernd (2004): The diatom flora and limnology of lakes in the Amery Oasis, East Antarctica. Polar Biology, 27(9), 513-531, https://doi.org/10.1007/s00300-004-0624-2
    Details
    Publication Date: 2023-10-28
    Description: The diatom flora of three lakes in the ice-free Amery Oasis, East Antarctica, was studied. Two of the lakes are meltwater reservoirs, Terrasovoje Lake (31 m depth) and Radok Lake (362 m depth), while Beaver Lake (〉435 m depth) is an epishelf lake. The lakes can be characterized as cold, ultra-oligotrophic and alkaline, displaying moderate (Radok and Terrasovoje lakes) to high (Beaver Lake) conductivities. There was no diatom phytoplankton present in any of the three lakes. While 34 benthic diatom taxa were identified from modern and Holocene sediments of Terrasovoje and Radok lakes, a 30-cm long sediment core recovered in Beaver Lake was barren. Five species (Luticola muticopsis, Muelleria peraustralis, Pinnularia cymatopleura, Psammothidium metakryophilum, P. stauroneioides) are endemic to the Antarctic region. All identified taxa are photographically documented and brief notes on their taxonomy, biogeography and ecology are provided. The most abundant diatom taxa are Amphora veneta, Craticula cf. molesta, Diadesmis spp, M. peraustralis and Stauroneis anceps. This is the first report on the diatom flora in lakes of the Amery Oasis.
    Keywords: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SPP1158
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 4
    Electronic Resource
    Electronic Resource
    TIME-RESOLVED FLUORESCENCE DETECTION OF SHIGA-LIKE TOXINS PRODUCED BY ESCHERICHIA COLI O157 AND NON-O157 IN GROUND BEEF (2004)
    Oxford, UK and Malden, USA : Blackwell Science Inc
    Journal of rapid methods and automation in microbiology 12 (2004), S. 0 
    Details
    ISSN: 1745-4581
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: An immunomagnetic bead time-resolved fluorescence assay (IMB-TRF) was developed for the detection of Shiga-like toxins I and II (SLT I and II) from Shiga-like toxin-producing Escherichia coli (STEC). Twenty-five gram of ground beef patties were inoculated with 1 CFU/g of O157 or non-O157 (STEC) stored at 7C for 5 h and incubated with 100 mL added EC broth at 37C and 140 r.p.m. shaking for 20 h. Ten µg/mL of ofloxacin was added to the EC broth after 20 h of incubation to enhance toxin production. After 4 more hours of incubation, samples were removed and centrifuged for 10 min at 5000 r.p.m. The supernatant was removed and saved and a bacterial protein extraction reagent was used to lyse the cells in the pellet and release intracellular SLTs (Fraction I) which were then recombined with extracellular SLTs (Fraction II) present in the supernatant. Immunomagnetic beads coated with monoclonal antibodies specific to Shiga-like toxins I and II were applied to capture and concentrate the toxins and captured toxins were labeled with lanthanide-tagged antitoxin antibodies to from sandwiched complexes prior to detection by a TRF reader. TRF pathogen detection levels, defined as signals ≥ 2× uninoculated samples, were achieved in all STEC inoculated samples and no cross-reactivity was observed with either nonpathogenic microflora present on the meat or nontoxin-producing E. coli K12 inoculated samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4581.2004.12405.x
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    Paper (German National Licenses)
    Fulltext
  • 5
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    Late Pleistocene and Holocene history of Lake Terrasovoje, Amery Oasis, East Antarctica, and its climatic and environmental implications (2004)
    In:  EPIC3Journal of paleolimnology, 32, pp. 321-339
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 6
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    Late Pleistocene and Holocene climate and environmental history of Amery Oasis, East Antarctica, documented in a sedimentary record from Lake Terrasovoje (2004)
    In:  EPIC3XXVIII SCAR Open Science Conference, 3-9 October 2004, Bremen, Germany.
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 7
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    The diatom flora and limnology in lakes of the Amery Oasis, East Antarctica (2004)
    In:  EPIC3Polar biology, 27, pp. 513-531
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 8
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    Distance communication transfer of HIV prevention interventions to service providers (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-09-28
    Description: Most acquired immunodeficiency syndrome (AIDS) service providers are in countries with little access to scientific developments relevant to their programs. It is critical to transfer advances from the scientific arena to service providers on a global scale. Human immunodeficiency virus (HIV) prevention organizations in 78 countries were randomized to receive either a control condition or a technology transfer condition with an interactive distance learning computer training curriculum and individualized distance consultation. Of 42 nongovernmental organizations in the technology transfer condition, 29 adopted the science-based program in their communities or trained other agencies to also use it. Advanced communication technologies can create a cost-effective infrastructure to disseminate new intervention models to service providers worldwide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kelly, Jeffrey A -- Somlai, Anton M -- Benotsch, Eric G -- McAuliffe, Timothy L -- Amirkhanian, Yuri A -- Brown, Kevin D -- Stevenson, L Yvonne -- Fernandez, M Isa -- Sitzler, Cheryl -- Gore-Felton, Cheryl -- Pinkerton, Steven D -- Weinhardt, Lance S -- Opgenorth, Karen M -- P30-MH52776/MH/NIMH NIH HHS/ -- R01-MH62982/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2004 Sep 24;305(5692):1953-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for AIDS Intervention Research (CAIR), Department of Psychiatry and Behavioral Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15448268" target="_blank"〉PubMed〈/a〉
    Keywords: *Communication ; Community Health Services ; Compact Disks ; Computer-Assisted Instruction ; *Education, Distance ; Follow-Up Studies ; HIV Infections/*prevention & control ; *Health Education ; *Health Personnel ; Health Promotion ; Humans ; Information Dissemination ; Organizations ; *Technology Transfer
    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)
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  • 9
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    The bacterial condensin MukBEF compacts DNA into a repetitive, stable structure (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-06-05
    Description: Condensins are conserved proteins containing SMC (structural maintenance of chromosomes) moieties that organize and compact chromosomes in an unknown mechanism essential for faithful chromosome partitioning. We show that MukBEF, the condensin in Escherichia coli, cooperatively compacts a single DNA molecule into a filament with an ordered, repetitive structure in an adenosine triphosphate (ATP) binding-dependent manner. When stretched to a tension of approximately 17 piconewtons, the filament extended in a series of repetitive transitions in a broad distribution centered on 45 nanometers. A filament so extended and held at a lower force recondensed in steps of 35 nanometers or its multiples; this cycle was repeatable even in the absence of ATP and free MukBEF. Remarkably, the pattern of transitions displayed by a given filament during the initial extension was identical in every subsequent extension. Hence, after being deformed micrometers in length, each filament returned to its original compact structure without the addition of energy. Incubation with topoisomerase I increased the rate of recondensation and allowed the structure to extend and reform almost reversibly, indicating that supercoiled DNA is trapped in the condensed structure. We suggest a new model for how MukBEF organizes the bacterial chromosome in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Case, Ryan B -- Chang, Yun-Pei -- Smith, Steven B -- Gore, Jeff -- Cozzarelli, Nicholas R -- Bustamante, Carlos -- GM31655/GM/NIGMS NIH HHS/ -- GM32543/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2004 Jul 9;305(5681):222-7. Epub 2004 Jun 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15178751" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Binding Sites ; Chemistry, Physical ; Chromosomal Proteins, Non-Histone/chemistry/*metabolism ; DNA Topoisomerases, Type I/metabolism ; DNA, Bacterial/*chemistry/*metabolism ; DNA, Superhelical/chemistry/metabolism ; Dimerization ; Escherichia coli/genetics ; Escherichia coli Proteins/chemistry/*metabolism ; Lasers ; Microspheres ; Models, Chemical ; Models, Molecular ; *Nucleic Acid Conformation ; Physicochemical Phenomena ; Protein Binding ; Protein Conformation ; Protein Subunits ; Repressor Proteins/chemistry/*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)
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  • 10
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    High spin states inSr95 (2004)
    American Physical Society
    Details
    Publication Date: 2004-06-16
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
    Published by American Physical Society
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