Fig. 3

The principle component analysis(PCA) of quality control. (a) Ruminal fluid samples in positive mode; (b) Ruminal fluid samples in negative mode; (c) Blood samples in positive mode; (d) Blood samples in negative mode.

The principle component analysis(PCA) of quality control. (a) Ruminal fluid samples in positive mode; (b) Ruminal fluid samples in negative mode; (c) Blood samples in positive mode; (d) Blood samples in negative mode.