Samar Bassam Moaz

7 Questions 11 Answers 0 Followers

Questions related from Samar Bassam Moaz

Dear colleagues, i have a herbal extract which i need to put in a nano formulation?

To measure the entrapment efficiency we use UV not HPLC, is it enough to measure absorbance at any wavelength selected by me? one with max. absorbance for the extract, but not related to a certain...

11 September 2021 5,729 1 View

What class of cpd is Cnmr spectrum of a butanol fraction compound shows sharp peak at 24, 54, 168, 177?

Can it be a saponin.

03 April 2019 4,885 2 View

Is it possible to identify saponin glycoside from nmr even if it hydrolysis during analysis and free sugars are present in the sample?

I have isolated saponin glycoside after many efforts to get it in pure form; sephadex and prep tlc However my saponins are very sensitive and they degrade giving me an glycoside and free sugars I...

02 March 2019 9,636 0 View

Any tried solvent systems for separation of saponins?

I precipitated saponins from butanol fraction using acetone. Saponins are mostly steroidal and highly polar . i tried many mobile phase systems on silica TLC but could not get a good...

20 May 2018 976 4 View

How to separate very close saponin spots on TLC?

I have a spot on TLC which on running 2D chromatography separates into 4 spots, i.e 4 compounds I need to isolate each alone but I only have few mgs and I tried more than one system to separate...

05 September 2016 7,262 3 View

Should a plant extract be dissolved in DMF or DMSO only for antimicrobial assay?

the extract dissolved in ethyl alcohol gave negative results...could it be due to poor diffusion to agar?

11 October 2015 1,778 9 View

What is the procedure & advantages of preprocessing of FTIR data?

For plant extracts

01 January 1970 1,858 0 View