title: Blood phosphorus levels of laying hens at various time intervals after dosing with phosphoric acid.
abstract: Two experiments were conducted to study the pattern of change in serum inorganic phosphorus level in laying hens fed a diet containing 0.30% total phosphorus after dosing with a known amount of phosphorus. Serum phosphorus level of undosed hens was 2.5 mg/100 ml at oviposition in both experiments. After dosing with 100 mg of phosphorus in 10 ml of a phosphoric acid solution, serum phosphorus level increased sharply and reached a peak of about 7.0 mg/100 ml between 30 and 60 minutes in experiment 2. After the peak the elevated level of serum phosphorus decreased logarithmically until 5 to 6 hours after dosing and eventually decreased to 2.5 mg/100 ml which was the serum phosphorus level of undosed hens in experiment 1. The half-life of the elevated portion of serum phosphorus due to the dosing was about 100 minutes.
mesh_terms: D000818:Animals; D002645:Chickens / Q000097:blood*; D005260:Female; D006207:Half-Life; D010058:Oviposition; D010756:Phosphoric Acids / Q000494:pharmacology*; D010758:Phosphorus / Q000097:blood*
chemical_list: D010756:Phosphoric Acids; D010758:Phosphorus