In this study 10 guaianolide-type sesquiterpene g-lactones named amphoricarpolides, isolated from the aerial parts of two endemic subspecies of Amphoricarpos neumayeri (ssp. neumayeri and ssp. murbeckii Bošnjak), were investigated by means of reversed-phase thin-layer chromatography. Methanol–water and tetrahydrofuran–water binary mixtures were used as mobile phase in order to determine lipophilicity parameters RM0 and C0. Some of the investigated compounds were screened for their cytotoxic activity against HeLa and B16 cells. Chromatographically obtained lipophilicity parameters were correlated with calculated logP values and IC50 values. Principal component analysis identified the dominant pattern in the chromatographically obtained data.
ABUBAKER A BASHIR ATRROG(9-2008)

Twenty-five authentic samples of Prunus amygdalus gum samples were collected from five different locations in northwest of Libya. Different physicochemical methods were used to characterize this type of gum samples. The mean values of the moisture ranged from 12.55 to 14.93%, ash mean values 4.03 to 4.62%, pH 3.89 to 4.40, W.H.C 52.85 to 60.0%, and O.H.C 136.2 to 156.3%. Solubility of Prunus amygdalus gum showed that it had low solubility in distilled water with the mean values ranged from 20.01 to 35.40%, but it dissolved perfectly in alkali media where solubility increased to 96.3% in 0.05 M Na2CO3. The study exhibited that the mean values of cationic concentration in %(w/w) such as calcium was ranged from 0.552 to 0.585, potassium 0.402 to 0.505, iron 0.0975 to 0.1125, and sodium 0.064 to 0.079, which indicates that Ca has the highest concentration of metallic ions present. Atomic absorption method indicate that all samples contain traces of elements, Li, Cr, Mn, Ni, Zn, Pb, Hg, and Cd. The main functional groups recorded from FTIR spectrum included bands at 3293 cm-1 (O-H in carboxylic group), 1601.77 cm-1 (C=O, amide N-H bend, and C=C), 1357.53 cm-1 (CH3-, and C-O-H in- plane bending vibration), and 1025.74 cm-1 (C-O stretching). arabic 16 English 99
Aborawi M. Elgornazi, M.H. Awad, Nouri M.A. Soleiman(2-2021)

The study focused on determining the levels of lead and cadmium in some samples of the best-selling and popular tea and coffee among people in Tripoli city-Libya during the years 2018-2019. Atomic Absorption Spectroscopy (AAS) has been used to determine the concentrate of cadmium and lead ions in different 17 tea samples, and 11 coffee samples. The mean values of cadmium and lead in (mg/kg) in tea samples as follows: The highest value for cadmium was found in Libton tea sample 0.260 ? 0.017, while the lowest value was found in Alkoozi red tea and Alfrdous tea samples 0.037 ? 0.006, with the overall mean was 0.119 ? 0.054. The highest value for lead was found in Alkoozi green tea sample 2.153 ? 0.012, while the lowest value was found in Alzahra tea sample 0.187 ? 0.002, with the overall mean was 1.118 ? 0.612. The results show that there are no significant differences in the values of lead in all coffee samples, which ranged from 1.23 to 1.62 mg/kg with the overall mean was 1.277 ? 0.358, except Sheikh Hbahanbelend coffee sample 0.271? 0.002 mg/kg. While the cadmium concentration in coffee samples ranged from 0.022 to 0.064 mg/kg, with the mean value 0.0514?0.0012. From these results can be noticed that coffee samples have about 11 times higher concentration of cadmium than tea, whereas the concentration of lead in tea is about 22 times higher than that in coffee samples.
ezuldeen mohammed abraheem aboushalloua(1-2022)