Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Abdel-Azim M. Habib"'
Autor:
Mohamed M. Radwan, Michael L. Klein, Shabana I. Khan, Amira S. Wanas, Abdel-Azim M. Habib, Fahima F. Kassem, Safa M. Shams Eldin, Khaled M. Elokely, Mahmoud A. ElSohly, Hala M. Hammoda
Publikováno v:
Journal of Natural Products. 81:1154-1161
The in vitro antidiabetic and antihyperlipidemic activities of an alcoholic extract of Trigonella stellata were evaluated in terms of the activation of PPARα and PPARγ in human hepatoma (HepG2) cells. The extract was investigated phytochemically, a
Autor:
Amira S. Wanas, Abdel-Azim M. Habib, Fahima F. Kassem, Hala M. Hammoda, Safa M. Shams Eldin, Mohamed M. Radwan, Mahmoud A. ElSohly
Publikováno v:
Natural Product Communications. 15:1934578X2094011
In this study, an ultra-performance liquid chromatography (UPLC)/photodiode array method was developed for the simultaneous determination of trigonellan glucoside (1), isotrigonellan (2), and methoxy-isotrigonellan (3) in Trigonella stellata extract
Autor:
MA ElSohly, Hala M. Hammoda, Shabana I. Khan, Amira S. Wanas, Abdel-Azim M. Habib, Fahima F. Kassem, SM Shams Eldin, Mohamed M. Radwan
Publikováno v:
Planta Medica. 82
Publikováno v:
Journal of Planar Chromatography – Modern TLC. 18:372-376
A high-performance thin-layer chromatographic (HPTLC) method has been established for determination of sildenafil citrate in commercial products. The compounds were separated on silica gel, with CHCl 3 -MeOH-diethylamine, 90 + 10 + 1 ( v/v ), as mobi
Publikováno v:
Journal of Natural Products. 71:1472-1474
Chemical investigation of the Red Sea sponge Pseudoceratina arabica has led to the isolation and identification of seven brominated compounds including two new bromotyramine derivatives, hydroxymoloka'iamine (2) and moloka'iakitamide (6), and a new b
Autor:
Abdel-Azim M. Habib, Mohsen Gaber, Alfonso De Giulio, Antonio Evidente, Rosa Lanzetta, Ahmed A. Seif El Din, Amina H. Abou-Donia
Publikováno v:
Phytochemistry. 30:3445-3448
Bulbs of Pancratium maritimum were found to contain a new glucosyloxy phenolic metabolise as well as 14 known Amaryllidaceae alkaloids. The structure of the phenolic metabolite was elucidated by spectroscopic and chemical methods, and it was identifi
Autor:
Diaa T. A. Youssef, Mohamed I. Abou-Shoer, Jihan M. Badr, Abdel-Azim M. Habib, Lamiaa A. Shaala
Publikováno v:
Journal of natural products. 71(8)
Reinvestigation of the Red Sea sponge Suberea mollis afforded two new bromotyrosine-derived alkaloids, subereamollines A (1) and B (2), two new brominated phenolic compounds, subereaphenols B (7) and C (9), and the known compounds aerothionin (3), ho
Autor:
Abdel-Azim M. Habib, Mohamed R I Saleh
Publikováno v:
Journal of AOAC INTERNATIONAL. 63:559-564
The acidic vs. alkaline difference spectra of cinnamic acid, benzoic acid, and total resin acids of tolu, benzoin, and colophony were studied. Characteristic maxima, minima, and isosbestic points of these spectra led to the development of a method fo
Publikováno v:
Journal of AOAC INTERNATIONAL. 63:1195-1199
In a previous work, a difference spectrophotometric method was developed for quantitating benzoic and cinnamic acids, in the presence of resin acids. In the present work, the technique was adapted for estimating the individual balsamic acids in balsa
Autor:
Abdel-Azim M. Habib
Publikováno v:
Journal of Pharmaceutical Sciences. 69:37-43
A variety of nonnitrogenous oxygenated compounds gave false-positive alkaloid reactions with Dragendorff's spray reagent. These compounds reacted positively if the oxygen function and the β-carbon bonded to the oxygen had high electron density. Thus