The p24 antigen test can detect the p24 protein on average 10 to 14 days after infection with HIV.2,3,11,12 One drawback of this test is that levels of the p24 protein peak at around three to four weeks after exposure to HIV and are usually not detectable after five to six weeks (and sometimes even earlier).
Liquid nitrogen is nitrogen in a liquid state at an extremely low temperature.It is produced industrially by fractional distillation of liquid air. Liquid nitrogen is a colorless clear liquid with density of 0.807 g/ml at its boiling point and a dielectric constant of 1.43.iquid nitrogen is nitrogen in a liquid state at an extremely low temperature.
The chemical formula for nitrogen gas is N2. Nitrogen is a  colorless, odorless, tasteless gas that makes up 78.09% of the air  by volume. It is slightly lighter than air an â¦ d slightly soluble in  water.hare to: the chemical formula for Nitrogen Oxide is NO, not to be confused with Nitrogen Dioxide which is NO2 or Nitrous Oxide (laughing gas) which is N2O.