Add punctuation: Standard stock solutions of each compound were prepared in 100 of acetonitrile at a concentration of 1mgml
A: Standard stock solutions of each compound were prepared in 100% of acetonitrile at a concentration of 1mg/ml.

Add punctuation: The featured China GuangDong E27 led lamp manufacturers and listed here are sourced by the karnar lighting
A: The featured China GuangDong E27 led lamp manufacturers and listed here are sourced by the karnar lighting.

Add punctuation: Allow drvinstexe free download service
A:
Allow drvinst.exe free download service