Mosa Elhady Osman

Mosa Elhady Osman
Al-Neelain University | Alneelain · Department of Pharmacognosy

B.Pharm (Pharmacy), M.Pharm (Pharmacognosy), PhD (Pharmacognosy)/PostDoc.

About

10
Publications
24,041
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
25
Citations
Introduction
I have been doing postDoc training in isolation and biological testing of antioxidant constituents from plants at UP.
Additional affiliations
October 2016 - present
Al-Neelain University
Position
  • Professor (Assistant)
September 2016 - present
August 2016 - present
University of Pretoria
Position
  • PostDoc Position
Education
March 2008 - March 2011
University of Gezira
Field of study
  • PHARMACY

Questions

Questions (8)
Question
On TLC the compound have yellow- green color in day light and yellow fluorescence at UV light 365 nm. Its Rf =0.4.mobile phase (toluene:ethylacetate:formic acid)5:4:1, silica gel is stationary phase
Question
When I use this eluent , the top layer of silica gel converted to gel state.
Question
I use hexane:ethylacetate:dichloromethane(3:7:2) but resolved well.
Sample is methylene chloride fraction
Question
When I calculate RSA% using DPPH method I find negative % e.g. - 80%, -18%.
Question
I need formula for calculating %RSA using DPPH method
Question
what are the antioxidant reagents, other than gallic acid,  that can be used as positive control in DPPH test?
Question
Is it better to use HPLC or GC-MS? for analysis of essential oil, alkaloids and flavonoids
what are the suitable solvent for extraction of these phytochemicals

Network

Cited By

Projects

Project (1)
Project
Extraction and identification using TLC, HPLC from natural products.