The influence of large amounts of calcium carbonate in soils, as found widely under semi-arid conditions, on phosphate composition and its changes with time has been given little attention.

Change the medium 1 h before transfection. 2| To prepare the calcium phosphate–DNA coprecipitate, combine 100 μl of 2.5 M CaCl 2 with 25 μg of plasmid DNA in a sterile 5-ml plastic tube and ...

calcium phosphate. Sidewalk chalk is made from calcium and sulfate, which makes calcium sulfate. One of the most common chemicals connected to calcium is called “carbonate”, and together they make ...