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By means of gas chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS) urinary steroids obtained from a reference population of 56 subjects were analyzed for their C13/C12-ratios. The analytes encompassed androsterone (A), etiocholanolone (E), 11β-hydroxyetiocholanolone (OHE), 11β-hydroxyandrosterone (OHA), and 5β-pregnane- 3α,20α-diol (PD). A and E represent androgen metabolites (AM)...
Organic matter in sediment samples from three ODP sites (Ocean Drilling Program Leg 167) that form a south-north transect was investigated to reconstruct the paleoclimatic and oceanographic conditions on the California continental margin during the last 160 kyr. Alkenone-derived paleosea surface temperatures (SST) are 3 to 6°C colder in glacial stages and reveal a clear relationship with global climate...
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