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)

تكمن مشكلة البحث في الإجابة على التساؤلات التالية: 1. ماهي مهارات التفكير ماوراء المعرفي؟ 2. ما استراتيجيات تطوير التفكير ما وراء المعرفي؟ 3. مادور المعلم في تعليم التفكير ما وراء المعرفي؟ وهدف البحث إلى الكشف عن مهارات التفكير ماوراء المعرفي واستراتيجيات تطويره كذلك التعرف على دور المعلم في تعليم التفكير في التفكير واستخدمت الباحثة المنهج الوصفي التحليلي وتوصلت إلى مجموعة من الاستنتاجات. arabic 123 English 0
مسعودة مفتاح أحمد عبدالرحمن الحسيني(1-2014)

Abstract Teacher self-evaluation is an important dimension in the overall evaluation activities in educational programs. However, this dimension is often overlooked and not given its right share of importance. Teacher self-evaluation is neither included in teacher training programs nor is considered a basic requirement from teachers as they develop in their careers. The significance and value of teacher self-evaluation as a core element in continuing professional development requires that self-evaluation proceed all other forms of evaluation. To support the claim that teacher self-evaluation is a missing element in the area of investigation, the researchers conducted a study which adopted a survey that involved eleven schools and 86 Libyan teachers. The results of the study showed that while many teachers perform some sort of self-reflection about their teaching, they do not recognize self-evaluation as a basic requirement in developing their career. When the effectiveness of teacher self-evaluation was probed in contrast to external evaluation, most teachers agreed that teacher self-evaluation could play a far more vital role in continuing professional development. Keywords Continuing Professional development, External evaluation, Self- evaluation.
Fawzia Mohamed Elwafi, Yousra Ali Aghanimi, Fahima Mohamed Bannur(4-2021)