Please capitalize where necessary: hyperkalemia is expressed by markedly higher than normal concentrations of potassium in the blood.
A: Hyperkalemia is expressed by markedly higher than normal concentrations of potassium in the blood.

Please capitalize where necessary: the evening will bring widely cloudy, but mainly dry weather.
A: The evening will bring widely cloudy, but mainly dry weather.

Please capitalize where necessary: use "save recovery session" option to save scanning information that can be used to resume scanning process after buying the software
A: Use "Save Recovery Session" option to save scanning information that can be used to resume scanning process after buying the software

Please capitalize where necessary: when the unit is adjusted below 3.0v, or 3.0w, it will cycle back to the highest setting (6.0v or 15w.)
A:
When the unit is adjusted below 3.0V, or 3.0W, it will cycle back to the highest setting (6.0V or 15W.)