I am very sorry about being impolite in my previous email. I found myself that I addressed professor Lim and Park in a wrong way and some inappropriate expression.

Since I am not used to write an official email in English, I was having hard time conveying my idea and expressing my feeling through email in a polite way.

During my holiday, I googled how to write a polite email in English to impove myself.  

I promise that I am not going to make such a bad mistake again.

Please accept my apology.

I know that you have limited time, but I would appreciate any advice you could offer me about EPR trip.

I have questions regarding EPR sampling and measurement. 1. Since water is not proper solvet for galssing, I was wondering if It would be better to be mixed with glycerol.

2. In the recent paper of professor cho's group, [JACS,2017], they showed EPR spectra of [Co(II)(TBDAP)(H2O)(NO3)](NO3) in a range of 25 mT to 35 mT (here, they used acetonitrile as a solvent). I think, it would be better for comparison to measure the spectrum in a wider range but I am not sure about this. 

3. At our last meeting, Professor Lim and you expected  [Co(II)(TBDAP)(H2O)(NO3)](NO3) in basic solvent with aerobic condition (750 nm peak distinctively growing) as Co(III) superoxo species. Regarding this, should I measure EPR specrum in parallel mode as well as perpendicular mode?Now that this is my very first time to maesure EPR sample, I was afraid that I would not be able to determine the experimental condition properly. Thank you very much for your time.