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

More Souad Djellali's questions See All

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,...

05 June 2015 8,479 15 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,...

04 May 2015 5,672 4 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...

04 May 2015 7,997 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...

04 May 2015 925 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;...

04 May 2015 680 5 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.

05 June 2014 5,194 3 View

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

See above

04 May 2014 1,644 8 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

What are the most reliable approaches to extract key continuous frames from a video, with complete automation?

I have an input video, of skin (from a microscope that means it is magnified such that blood capillaries are visible). The idea is to extract 15 sec of continuous frames from a video of 1 min,...

02 March 2021 2,735 2 View

Which is the best place in the world for the plant biotechnology research?

I am searching for a good place for the Post Doc,

02 March 2021 4,053 3 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

How can extract ciprofloxacin hydrochloride disolve in water er to organic solvent such as dichloromethan or any other solvent?

I need a procedure to extract the ciprofloxacin hydrochloride from aqueous solution by using dichloromethane in detail,. I thank you very much.

01 March 2021 4,306 1 View

Which bacteria are suitable for quorum sensing screening?

I want to find a quorum sensing inhibitor from plant extracts. Klebsiella pneumoniae, Moraxella catarrhalis, Staphylococcus aureus, and Streptococcus pneumoniae. I looked for these strains...

01 March 2021 7,675 3 View

Isolates of Hymenoscyphus fraxineus?

Dear Dr. Cai, my name is Simone Prospero and I work in the team of Phytopathology at the Swiss Federal Institute for Forest Snow and Landscape Research (WSL;...

01 March 2021 1,133 1 View

How to perform statistical analysis of coefficients extracted from transform techniques?

I am studying the potential of DCT and FFT coefficients extracted from a signal to classify the different objects that emit the signal. I applied the Shapiro-Wilk to confirm that data was not...

01 March 2021 8,079 2 View