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 boiling point of nitrogen is 63.1Â°K, -195.80Â°C, or -321Â° F at  atmospheric pressure. 23 people found this useful. Edit. Share to: The question and answer are locked and cannot be edited.elting points and boiling points are the temperature at which substances change state. Melting point-solid to liquid Boiling point-liquid to gas These temperatures â¦ will vary depending on the properties of the substance. 20 people found this useful.