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)

Thirteen Olive oil samples were collected from five different places in the western Libyan region with different cultivation periods. The physical and chemical properties of samples were investigated and classified whether they comply with the Libyan standard specification number 8/2002 or not. The density and refractive index of almost all samples were found within the normal range (0.908-0.919) and (1.4688-1.4705) respectively whereas the chemical properties showed a range of fluctuated values such as peroxide number (11.20-60.40), acidity value (0.737-17.94), saponification number (185.34-199.65), esterification number (173.84-194.36) and iodine number (71.00-94.10). A third of the investigated samples are considered to be of good quality mainly the newer samples
Ragiab A. M. Issa(9-2017)

أجري هذا البحث لتقدير فيتامين C في العصائر الطازجة لبعض عينات الليمون والبرتقال المحلي. وتم تقدير تركيزالفيتامين بطريقة المعايرة باستخدام محلول اليود القياسي وأظهرنتائج هذا البحث أن كمية الفيتامين تختلف باختلاف العينة وحتى في عينات نفس النوع، حيث وجد أن تركيز فيتامين C بوحدة ملغ\100مل لعينتين من نفس النوعللبرتقال الدمي (37 و 76) وبرتقال أبو سرة (33 و 64) وللبرتقال الحلو (28 و 40) ولليوسفي (17 و 28) وللبرتقال المر (24.7 و 48) وللبرتقال الحامض (31 و 58) ولليمون (21 و 41) وأعلى تركيز كان لعينة البرتقال الدمي وأقل تركيز كان لعينة الليمون.
رجب علي المختار عيسى(1-2021)