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  • Nature Publishing Group  (4,436)
  • 2015-2019
  • 1995-1999  (4,436)
  • 1996  (4,436)
Collection
Publisher
Years
  • 2015-2019
  • 1995-1999  (4,436)
Year
  • 1
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    Two-way exchange between the Easter mantle plume and the Easter microplate spreading axis (1996)
    Nature Publishing Group
    In:  Nature, 382 (6589). pp. 344-346.
    Details
    Publication Date: 2017-02-27
    Description: The conventional model whereby plume volcanism forms linear age-progressive volcanic chains, with the youngest activity occurring nearest a spreading axis (at a 'hotspot'), has been challenged for the Easter seamount chain1–4. Whereas early work suggested the existence of a linear melting anomaly (a 'hotline')1,2, more recent studies3,4 have proposed a hotspot near Salas y Gomez island, connected with the Easter microplate spreading system by an ~800-km-long, volcanically active plume channel. Here we use geochemical, geological and geochronological data to argue that the hotspot lies close to Easter Island. Moreover, new isotopic data for lavas from the seamount chain provide evidence for bidirectional flow between the spreading axis and the plume, thus supporting geophysical and fluid-dynamical models of mantle flow in a plume/spreading axis system5–7. Material balance and flux considerations show the Easter plume to be weak and cool compared with those beneath larger features such as Iceland, Hawaii and the Galápagos islands.
    Type: Article , PeerReviewed
    Format: text
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  • 2
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    Chlorin accumulation rate as a proxy for Quaternary marine primary productivity (1996)
    Nature Publishing Group
    In:  Nature, 383 (6595). pp. 63-65.
    Details
    Publication Date: 2017-02-27
    Description: A knowledge of past changes in the biological productivity of the oceans is important for understanding the interactions between carbon cycling and climate. Phytoplankton productivity in today's oceans can be estimated from the concentrations of chlorophyll in sea water1, but chlorophyll is not preserved in the sediments. Existing proxies for past algal productivity do not represent total productivity; for example, biogenic opal2 reflects the contribution of only part of the phytoplankton community, and the organic carbon record can be subject to contamination from terrestrial inputs2,3. Although chlorins, the pigment-transformation products of chlorophyll, are widespread in Quaternary marine sediments, their potential as proxy measures of past variations in primary productivity has not been convincingly demonstrated. Here we report a high-resolution molecular stratigraphic record of chlorin concentrations over the past 350,000 years in a sediment core from the subtropical Atlantic continental margin. Maxima in the chlorin accumulation rate coincide with significant peaks in the accumulation rates of biogenic opal (at the end of glacial terminations) and organic carbon (between terminations). These results suggest that chlorins, unlike other proxies, can serve as a measure of total primary productivity variations.
    Type: Article , PeerReviewed
    Format: text
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  • 3
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    Flavodoxin as an in situ marker for iron stress in phytoplankton (1996)
    Nature Publishing Group
    In:  Nature, 382 . pp. 802-805.
    Details
    Publication Date: 2017-02-27
    Description: A fundamental issue in marine science is the identification of the factors controlling biological uptake of CO2, in high-nitrate, low-chlorophyll regions. A recent in situ iron fertilization experiment demonstrated that iron limitation is responsible for low phytoplankton stocks in the equatorial Pacific4. Here we show that flavodoxin, a biochemical marker of iron limitation, can be used to map the degree of iron stress in natural populations. Flavodoxin assays along a 900-km east-west transect in the northeastern subarctic Pacific revealed a pronounced increase in iron stress in the region west of the 135° W meridian. Addition of dissolved iron alleviated this stress. Immunostaining of single cells from the most western station showed that flavodoxin is present specifically within the chloroplasts of diatoms. Our approach provides a rapid means of defining the extent of iron stress in the ocean5 and supports the hypothesis that diatoms are iron stressed in the northeast Pacific.
    Type: Article , PeerReviewed
    Format: text
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  • 4
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    Deep-breathing cephalopods? (1996)
    Nature Publishing Group
    In:  Nature, 384 (6608). p. 421.
    Details
    Publication Date: 2021-08-20
    Type: Article , PeerReviewed
    Format: text
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  • 5
    Electronic Resource
    Electronic Resource
    DNA immunization induces protective immunity against B–cell lymphoma (1996)
    [s.l.] : Nature Publishing Group
    Nature medicine 2 (1996), S. 1038-1041 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Idiotypic determinants of the immunoglobuiin expressed on the surface of B–cell lymphomas are tumor–specific antigens (TSAs), which can be targeted by immunotherapy. Immunization with DNA constructs encoding the idiotype (Id) of a murine B–cell lymphoma induced specific ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm0996-1038
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  • 6
    Electronic Resource
    Electronic Resource
    Japan's E.coli outbreak elicits fear, anger (1996)
    [s.l.] : Nature Publishing Group
    Nature medicine 2 (1996), S. 956-956 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] The recent outbreak of mass food poisoning among school children in Japan caused by a deadly strain of the bacteria Escherichia coli is exposing Japan's inability to protect its citizens' health against emerging disease.Parents of infected children have been outraged about the initial apparent lack ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm0996-956a
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  • 7
    Electronic Resource
    Electronic Resource
    Did you know? (1996)
    [s.l.] : Nature Publishing Group
    Nature medicine 2 (1996), S. 958-958 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Few Cornell medical students take “extraordinary opportunity”Does a free year of medical school following a year of living in New York for only $400 a month sound too good to be true? Each of the 119 students accepted to Cornell University Medical College for the 1996–1997 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm0996-958b
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  • 8
    Electronic Resource
    Electronic Resource
    Resistance to HIV–1 infection: It's in the genes (1996)
    [s.l.] : Nature Publishing Group
    Nature medicine 2 (1996), S. 966-967 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Two studies published in recent issues of Cell1 and Nature2 present compelling evidence that a distinct genetic factor in the human host is critical to the infectivity of HIV-1. At issue is the gene responsible for the normal expression of CCR-5; the co-receptor for macrophagetropic strains of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm0996-966
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  • 9
    Electronic Resource
    Electronic Resource
    STATs and cytokine specificity (1996)
    [s.l.] : Nature Publishing Group
    Nature medicine 2 (1996), S. 968-969 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Signal transducers and activators of transcription (STATs) are latent cytosolic transcription factors that are activated by Janus family (Jak) tyrosine kinases after cellular stimulation by interferons and cytokines1 (see figure). There are four known mammalian Jak kinases Qakl, Jak2, Jak3 and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm0996-968
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  • 10
    Electronic Resource
    Electronic Resource
    Translational research comes of age (1996)
    [s.l.] : Nature Publishing Group
    Nature medicine 2 (1996), S. 974-975 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Of the approximately one million new cancer cases diagnosed in the US annually, about 50 percent carry a mutation in one copy of the p53 tumor suppressor gene and exhibit loss of the other wild-type allele1. Among the 170,000 new cases of lung cancer, the frequency of pS3 mutations is estimated to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm0996-974
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