Stable isotope ratio analysis at natural abundance in human hair protein offers a
noninvasive method to reveal information about long-term nutritional exposure to specific …

Compound-specific isotope analysis encompasses a variety of methods for examining the
naturally occurring isotope ratios of individual organic molecules. In marine environments …

Depolymerization of high‐molecular weight organic nitrogen (N) represents the major
bottleneck of soil N cycling and yet is poorly understood compared to the subsequent …

Proteins constitute the single largest soil organic nitrogen (SON) reservoir and its
decomposition drives terrestrial N availability. Protein cleavage by extracellular enzymes is …

Burial of organic carbon in marine sediments has a profound influence in marine
biogeochemical cycles and provides a sink for greenhouse gases such as CO 2 and CH 4 …

Food web research is rapidly expanding through study of natural fractional abundance of 15
N in individual amino acids. This paper overviews the principles of this isotope approach …

Nitrogen biogeochemistry during the beginning of a spring phytoplankton bloom in the
Yellow Sea was investigated based on nutrient concentrations, benthic fluxes of nutrients …

Proteins comprise the largest soil N reservoir but cannot be taken up directly by
microorganisms and plants due to size constraints and stabilization of proteins in organo …

Stable nitrogen isotopic ratios were measured in sinking particles and surface sediments
from the South China Sea (SCS) in order to study recent nitrogen sources and degradation …

Abstract Pathways of ammonium (NH 4+) removal were investigated using the stable
isotope approach in constructed wetlands (CWs). We investigated and compared several …