Salvia officinalis L. is a Mediterranean species, naturalized in many countries. The composition of essential oil isolated from Salvia officinalis L, wild growing in Libya, was analyzed. In this study, essential oils from fresh and dry leaves of Salvia officinalis L, Libya, were extracted with ethanol, hexane or chloroform as solvents using Soxhlet apparatus and the extracts were analyzed using gas chromatography/mass spectrometry method. Each solvent showed differences in the extraction yields between fresh and dry leaves. Physical constants of the extracts were shown variation in color, viscosity, density, PH and percentage of production between fresh and dry leaves for each solvent. GC-MS results showed that ethanol could extract the most compounds compared to hexane and chloroform from both fresh and dry leaves. In total 41, 28 and 31 compounds were identified in the essential oils of fresh and dry leaves of Salvia officinalis L using ethanol, hexane or chloroform respectively. For each solvent the number of compounds extracted from dry leaves was bigger than the number extracted from fresh leaves. arabic 33 English 104
ABUBAKER A BASHIR ATRROG, abdunnaser mohamed mohamed megrahi, Fathia Mousa H Altalhi(4-2018)

Blended learning is widely adopted as an effective approach to develop the traditional teaching style, and to fulfill the satisfaction of learners, students, and institutions. Therefore, this paper discusses the effectiveness of blended learning with learning management systems (LMS) implications in higher engineering education. Blended learning concepts, components, and challenges are discussed, as well as strategies of implementation are introduced.
Osama Terfas, Nadia Nuseir, Ahmed Maher(5-2021)

كتاب يجمع أشتاتا من الآداب؛ مقالات، ورحلات، ومطارحات شعرية، وتدوينات وغير ذلك
محمد الصادق سالم الخازمي(12-2018)