Hicham Mechqoq

9 Questions 28 Answers 0 Followers

Questions related from Hicham Mechqoq

Sililated organic extract GC-MS, Kovats index or Van den Dool and Kratz index ??

dear colleagues, I'm doing a GC-MS analysis of presilylated extracts with BSTFA (essentially polyphenols) and i want to determinate an Index to compare with adams book (2007), which index should I...

10 October 2019 4,287 2 View

How to Interpret ANOVA's results ?

Dear colleagues I have made two ways ANOVAs and post hoc tests, I have obtained the ANOVA's table (SCE, f & p values) with approximatively similar values but the entered responses were different,...

10 October 2019 2,327 8 View

Which reagent is better for lipids HPTLC revelation ?

Dear colleagues, I'm doing an HPTLC of several plant oils to compare their lipidic profiles, i have two protocoles the first one with sulfuric-vanillic acid, the second with phosphomolibdic acid....

09 September 2019 4,880 5 View

ABTS radical scavenging protocole modification ?

dear collegues, i would like to study the radical scavenging effect of some plant extracts against ABTS, and i would like to know if i can change the sodium persulfate with sodium sulfate and the...

07 July 2019 3,659 4 View

How can I interpret the GC-MS results obtained after sililation of an extract???

Dear collegues. I have analysed some extracts by GC-MS after sililation and i have obtained my report after comparing the results with the NIST database, Before doing more bibliographic...

03 March 2019 4,345 4 View

ABTS or DPPH: Which antioxydant assay is the best for an bioautography test on TLC?

Dear collegues, I'm doing an HP-TLC of some extracts and would like to do an antioxydant screening on plate (DPPH-TLC or ABTS-TLC) I would like to know wich one is the best and why ??

01 January 2019 10,007 4 View

Can the fluoresent colors of compounds on a TLC under 366nm be inerpreted ? if yes which compound correspond to which color ?

i'm doing TLCs and visualising my plates under 254nm & 366nm, I would like to know if it's possible to correlate the fluoresent colorations i obtain with families of secondary metabolites.

10 October 2018 8,244 6 View

Payed publications VS open acess ? do you think we will still have payed publications after 20 years ?

After the use of paper hack tools such as sci-hub the majority of journals prefer the open-access format where the authors pay the publication to be shared. Do you think we ll still have pay to...

01 January 1970 9,536 3 View

Comparison between the Hydrodistillation & SFE extracted essential oils

dear colleagues. I would like to know what is the difference between SFE and hydrodistillation extracted essential oils, i have heard that SFE EO cannot be defined as essential oils according to...

01 January 1970 2,683 3 View