Souad Djellali

8 Questions 13 Answers 0 Followers

Questions related from Souad Djellali

How can I get the highest yield in plant extraction?

Hi, Could you please tell me what is the best solvent which gives the highest yield in extraction of secondary metabolites from plants? and what is the best way: decoction, maceration, soxhlet,...

06 June 2015 8,564 15 View

How can I dissolve plant extracts in an acidic or basic medium?

Hi, I want to test my plant extracts as a corrosion inhibitor in an acidic medium (HCl 1M). For that I prepared plant extracts in MeOH / water (80/20) and evaporated solvents but my extracts are...

05 May 2015 8,040 4 View

Why are my methanolic plant extracts not completely soluble in methanol?

Hi, I prepared plant extracts in MeOH /water (80/20) and evaporated both solvents. However, my extracts are not completely soluble either in water or in methanol, Could you please tell me why and...

05 May 2015 971 6 View

Why all publications are using glassy carbon/platinum wire electrodes in tests of cyclic voltammetry of plant extracts?

Hi, I want to perform antioxidant activity of plant extracts by cyclic voltammetry. I find that all publications used glassy carbon as working electrode and platinum wire as auxiliary electrode;...

05 May 2015 724 5 View

What is the adequate H2O2 concentration in superoxide radical scavenging test of plant extract?

Hi, I want to test the antioxidant power of my plant extracts using H2O2 as oxidant agent. Literature mentioned two different concentrations of H2O2: 40 mM and 4mM and I am really confused. So,...

05 May 2015 5,714 4 View

Can someone tell me why I have blurred (cloudy) solution when I add folin-ciocalteu reagent to my plant extract?

Folin-Ciocalteu reaction What to do to resolve this problem? Thank you.

09 September 2014 5,167 2 View

Could anyone tell me why I have an oily or pasty methanolic extract of my plant?

And how may I remove this oily or pasty phase and get a dry extract? I want to obtain a dry extract, easily handled and weighed, to prepare accurate solutions for anti-microbiogram.

06 June 2014 5,236 3 View

What is the most efficient protocol to extract alkaloids from plants?

See above

05 May 2014 1,694 8 View