Related by context. Frequent words. (Click for all words.) 61 isotope ratios 57 oxygen isotope 55 isotopic composition 54 subglacial 53 spectral signatures 52 RNA sequences 51 magnetic susceptibility 51 oxygen isotopes 51 foraminifera 51 sediment cores 51 marine sediments 51 microfossils 50 tumor biopsies 50 isotopic 50 genomic sequence 50 geochemists 50 elemental composition 50 abundances 50 nucleotide sequence 49 trimer 49 differentially expressed genes 49 microstructural 49 biologically relevant 49 radiocarbon dates 49 chemical composition 49 inorganic compounds 49 amphipods 48 particle sizes 48 methane ethane 48 naturally occuring 48 Lake Vostok 48 kimberlite indicator minerals 48 geochemical signature 48 nanobubbles 48 sediment samples 48 bathymetric 48 electron density 48 radiocarbon 48 Martian meteorites 48 amino acid sequences 48 biogenic 48 mitochondrial genome 48 photochemistry 47 sulphide deposits 47 metagenomic 47 petrographic 47 igneous rocks 47 macromolecule 47 diatom 47 chemical reactivity 47 microdiamonds 47 linkage disequilibrium 47 otoliths 47 Soil samples 47 biogeochemical 47 lunar craters 47 goethite 47 aragonite 47 hydrothermal vent 47 morphologies 46 Spectroscopic 46 photosynthetic organisms 46 polycyclic aromatic hydrocarbons PAHs 46 naturally occurring mineral 46 spatial scales 46 bathymetry 46 colorimetric 46 exosphere 46 carbonate minerals 46 gene expression profiles 46 braincase 46 spectral signature 46 diatoms 46 geochemical samples 46 genetic polymorphisms 46 microRNA expression 46 semiconducting materials 46 extrasolar 46 kimberlitic 46 odorants 45 ultracold atoms 45 molecularly 45 Shewanella 45 Neu5Gc 45 stable isotope 45 zonation 45 nanoporous 45 histone modifications 45 Geochemistry 45 metabolomic 45 sorption 45 nanosized 45 biodegraded 45 jarosite 45 biopsy specimens 45 fatty acid composition 45 hydrothermal fluids 45 analyte 45 methylation patterns 45 lavas 45 fluorescent probes