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Sørensen Ahring. 1993 - Co- enzymes) F420 NADH Peck Chynoweth, 1992) F420 F420 F420 F420 Near-infrared spectroscopy, NIR) Nordberg , 2000 Fluorescence In-situ hybridization, FISH Schmidt , 2000 Genetic fingerprinting) Denaturing gradient gel electro phoresis, DGGE Muyzer Smalla. 1998)