Together, they make the substance, calcium phosphate. Sidewalk chalk is made from calcium and ... In this activity, you can use a common liquid to detect calcium carbonate! Cover your work surface ...

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 ...

Babies up to the age of 1 year need 8.5 to 10 micrograms of vitamin D a day. The NHS adds: "From about late March/early April to the end of September, the majority of people should be able to make all ...