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  • Productivity  (2)
  • Sediment focusing  (2)
  • Coronary risk  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Geochemistry of a piston core from Ontong Java Plateau (western equatorial Pacific): evidence for sediment redistribution and changes in paleoproductivity (1996)
    Springer
    International journal of earth sciences 85 (1996), S. 536-545 
    Details
    ISSN: 1437-3262
    Keywords: Ontong Java Plateau ; Thorium-230 ; Barium ; Productivity ; Lysocline ; Sediment focusing ; Vertical mass accumulation rate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract We discuss geochemical proxies, reflecting processes of primary productivity, CaCO3 dissolution, and sediment redistribution in a piston core (RNDB 74P) from the Ontong Java Plateau. Due to the shallow water depth, biogenic carbonate is well preserved and a very goodδ 18O stratigraphy is available down to isotopic stage 11.230Thex gives evidence that the sediment accumulation pattern is driven mainly by processes of sediment focusing or winnowing. Due to the constant production of230Th in the water column, the bulk sediment accumulation rates could be corrected for the particle rain deriving from the water column above. The230Thex 0/CaCO3 ratio reflects the well-known Pacific CaCO3 preservation pattern with ice growth dissolution spikes and deglacial preservation spikes. The record of the grain size fraction 〉63 µm supports these results. The downcore concentrations and accumulation rates of barium (Ba) are on a higher level during interglacials and show several peaks. Normalization of Ba with230Thex 0 delivers a more uniform level of the Ba accumulation rates throughout the core. This pattern suggests a constantly higher biological productivity (nearly tenfold) in this area throughout the past 200 kyr compared with an open ocean environment. Barium peaks observed at the climatic transitions 2/1 and 6/5 and in stage 5 are in contrast to a predicted reduction of interglacial productivity at this location. A possible explanation might be the onset of the modern circulation pattern. The transition from Ba-enriched deep water to lower contents in the Atlantic might have resulted in an enhanced deposition of Ba in the Pacific.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02369008
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Hyperglycemia and coronary risk factors results from western Austria (1992)
    Springer
    European journal of epidemiology 8 (1992), S. 40-45 
    Details
    ISSN: 1573-7284
    Keywords: Coronary risk ; Hyperlipidemia ; Hypertension ; Hyperglycemia ; Overweight ; WHO-CINDI ; Epidemiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We investigated mean levels and prevalences of total cholesterol, HDL cholesterol, triglycerides, fasting blood glucose, systolic blood pressure and body mass index in adults aged 25 to 64 years participating in the WHO Country-wide Integrated Noncommunicable. Diseases Intervention (CINDI) Programme in Vorarlberg, western Austria. According to the Austrian expert panel and based upon the above age standardized risk factors 50.9% of the male and 29.3% of the female population were at high risk for developing coronary heart disease. Risk factor levels were further compared between euglycemic and hyperglycemic participants. After adjusting for age hyperglycemia was associated with higher body mass index in men (p=0.026) and women (p〈0.001), higher systolic blood pressure in men (p〈0.001) and women (p=0.003), and higher levels of triglycerides in women (p=0.008). No significant differences were observed in total and HDL cholesterol in either sex. When controlling for age and body mass index, fasting blood glucose levels had significant associations only with systolic blood pressure in men (p=0.001). But, with respect to all risk factors, hyperglycemic participants had an age-adjusted adverse coronary risk profile both in men (p=0.002) and in women (p〈0.001).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02427390
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Geochemistry of a piston core from Ontong Java Plateau (western equatorial Pacific): evidence for sediment redistribution and changes in paleoproductivity (1996)
    Springer
    Geologische Rundschau 85 (1996), S. 536-545 
    Details
    ISSN: 0016-7835
    Keywords: Key words Ontong Java Plateau ; Thorium-230 ; Barium ; Productivity ; Lysocline ; Sediment focusing ; Vertical mass accumulation rate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  We discuss geochemical proxies, reflecting processes of primary productivity, CaCO3 dissolution, and sediment redistribution in a piston core (RNDB 74P) from the Ontong Java Plateau. Due to the shallow water depth, biogenic carbonate is well preserved and a very good δ18O stratigraphy is available down to isotopic stage 11. 230Thex gives evidence that the sediment accumulation pattern is driven mainly by processes of sediment focusing or winnowing. Due to the constant production of 230Th in the water column, the bulk sediment accumulation rates could be corrected for the particle rain deriving from the water column above. The 230Thex 0/CaCO3 ratio reflects the well-known Pacific CaCO3 preservation pattern with ice growth dissolution spikes and deglacial preservation spikes. The record of the grain size fraction 〉63 μm supports these results. The downcore concentrations and accumulation rates of barium (Ba) are on a higher level during interglacials and show several peaks. Normalization of Ba with 230Thex 0 delivers a more uniform level of the Ba accumulation rates throughout the core. This pattern suggests a constantly higher biological productivity (nearly tenfold) in this area throughout the past 200 kyr compared with an open ocean environment. Barium peaks observed at the climatic transitions 2/1 and 6/5 and in stage 5 are in contrast to a predicted reduction of interglacial productivity at this location. A possible explanation might be the onset of the modern circulation pattern. The transition from Ba-enriched deep water to lower contents in the Atlantic might have resulted in an enhanced deposition of Ba in the Pacific.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005310050094
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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