Precipitation occurs when adjacent DNA helices ... It was found that RNA removal improves the throughput of subsequent ion-exchange columns for plasmid DNA, reducing the resolution required ...

A few drops of dilute sodium hydroxide solution react to form a white precipitate with aluminium ions, calcium ions and magnesium ions. However, if excess sodium hydroxide solution is added ...

A white precipitate forms if sulfate ions are present. Explain why, in a test for sulfate ions, the sample is acidified with hydrochloric acid first. Carbonate ions also produce a white ...

Ammonia is added to solutions of cobalt, nickel, and copper 2+ cations. First formation of the hydroxide precipitate is seen, then of the ammonia complex. Pour 0.1M solutions of Cu2+, Co2+, and Ni2+ ...

A water softener reduces the dissolved calcium, magnesium, and to some degree manganese and ferrous iron ion concentration in ...

Some scientists think it is all down to negative ions. These are odourless ... The air is cleaner during rainfall and after it because raindrops wash dirty particles out of the atmosphere.