TY - GEN AU - Richardson,D J TI - Introduction: nitrate reduction and the nitrogen cycle SN - 1420-682X PY - 2001///0419 KW - Eukaryotic Cells KW - metabolism KW - Nitrates KW - Nitrogen KW - Oxidation-Reduction KW - Prokaryotic Cells N1 - Publication Type: Journal Article UR - https://doi.org/10.1007/PL00000844 ER -