The present study aims to determine the best technique of Guanidinoacetic acid (GAA) supplementation improve retention added GAA after immersion in water on growth performance Pangasius catfish (Pangasius hypophthalmus). juveniles with a mean body weight and length 16.05 ± 0.47 g 12.42 0.30 cm were randomly distributed into 9 pond units (2 x 1 0,6 m). Three experimental diets formulated contain...

The guanidino compounds guanidine, methylguanidine, guanidinoacetic acid, guanidinopropionic acid, guanidinobutyric acid and guanidinosuccinic acid were eluted and separated after pre-column derivatization with glyoxal from an HP-5 column (30 m × 0.32 mm i.d.) with film thickness 0.25 µm at an initial column temperature of 100 °C for 2 min, with ramping of 20°C/min up to 250 °C and a nitrogen f...