Olukayode Solomon Ajayi

6 Questions 19 Answers 0 Followers

Questions related from Olukayode Solomon Ajayi

How can one resolve the structures of the same isolated compounds with their respective stereochemistry?

These isolated compounds are from the same plants with same NMR, MS data and molecular formular (mol. masses) but different colours, textures, rf, solubilities which I know has to do with...

02 February 2018 3,941 0 View

Is there any record of the isolation of isovitexin dimer?

I isolated a flavonoid with 33 carbon signals from the C-13 NMR.

01 January 2014 2,363 2 View

What is anti- or acetylcholinesterase activity assay all about? How is it different from other biological assays such as antioxidant activity etc?

I isolated some phytochemicals mainly phenolics from some plants that I need to carry out bioassay(s) on them.

12 December 2013 1,173 4 View

Could this compound be a dimer or a racemic mixture?

I have isolated this flavonoid glycoside from the ethyl acetate fraction of the leaf extract. The C-13, and DEPT135 NMR experiments shows there are 2 carbonyl peaks, 16 other C- peaks as well as...

05 May 2013 913 2 View

How do I go about packing and what are the possible solvent systems?

I have very polar fractions from TLC which I suspect to be flavonoids. From my findings, I was convinced of the possibility of using a C-18 RP column for the separation. However, I have not used...

04 April 2013 2,321 11 View

I have this problem in isolating two spots on TLC, one sitting atop the other (close Rf). I have tried different solvent systems all to no avail.

Can I possibly use prep TLC for this situation?

10 October 2012 1,217 73 View