Third, a 30-ml sample of strained ruminal fluid was frozen and stored. Samples were later centrifuged at 25,000×g for 20 min before being analysed for Co concentration by atomic absorption spectrophotometry
Third, a 30-ml sample of strained ruminal fluid was frozenand stored. Samples were later centrifuged at 25,000×g for 20 min before being analysedfor Co concentration by atomic absorption spectrophotometry