term,name,definition,category,provenance,provenance_uri,note nitrogen_15_StableIsotopeRatioDelta,"Nitrogen-15, stable isotope ratio delta",Difference in the 15N:14N ratio between the sample and standard (del N 15),,Originally from the CUAHSI HIS VariableNameCV. See: http://his.cuahsi.org/mastercvreg/edit_cv11.aspx?tbl=VariableNameCV.,,