Abstract The objective of the current research is to emphasize on learning from the perspective of Ausubel's meaningful learning theory, indicate its classification for meaningful learning as well as to identify its educational advantages. The researcher used the descriptive approach to answer the questions raised and achieve the aforementioned objectives. The study tools were all the available literature in the field in addition to the psychological heritage. The results of this literary presentation have shown that the use of the Ausubel's teaching strategy leads to positive and valuable results if used properly, to make learning meaningful and achieve its specific objectives. The researcher recommended that: 1) The need to include curricula of teaching methods private and public and teaching applications of modern teaching strategies in educational programs in Education faculties based on the preparation of future teachers 2. Training courses for teachers in service in the employment of modern teaching strategies. 3. To support researchers in the field of methods, ways and strategies of teaching, and to use the results of their research to improve the output of the educational process. 4) In addition, urging the centres of curricula and teaching methods in the Ministry of Education to keep pace with the development and global experiences in the field of modern teaching strategies. هدف البحث الحالي إلى الكشف عن التعلم من منظور نظرية التعلم ذي المعنى لأوزوبل، وبيان تصنيفه للتعلم ذي المعنى وكذلك التعرف على مميزاته التربوية، واستخدمت الباحثة المنهج الوصفي من أجل الإجابة على التساؤلات المطروحة وتحقيق الأهداف المذكورة آنفاً، وكانت أداة الدراسة كل ما توفر من أدبيات المجال والتراث السيكولوجي، وأثمرت نتائج هذا العرض الأدبي على أن استخدام استراتيجية أوزوبل في التدريس تؤدي إلى نتائج إيجابية وقيمة إذا ما تم استخدامها بطريقة صحيحة تجعل التعلم ذا معنى ويحقق أهدافه المحددة، وأوصت الباحثة بما يلي: 1) بضرورة تضمين مناهج مقرر طرق التدريس الخاصة والعامة والتطبيقات التدريسية الاستراتيجيات التدريسية الحديثة في البرامج التعليمية في كليات التربية القائمة على إعداد معلمي المستقبل.2) إقامة دورات تدريبية للمعلمين أثناء الخدمة في مجال توظيف استراتيجيات التدريس المعاصرة. 3) دعم الباحثين في مجال طرق وأساليب واستراتيجيات التدريس، وتوظيف نتائج أبحاثهم في تجويد مخرجات العملية التعليمية.4) بالإضافة إلى حث القائمين على مراكز المناهج وطرق التدريس في وزارة التعليم على مواكبة التطور والتجارب العالمية في مجال استراتيجيات التدريس الحديثة. arabic 82 English 12
(1-2021)

Abstract: Rheological properties of Gum Habeil collected during three seasons had been studied. Intrinsic viscosity of aqueous solution of Gum Habeil was calculated by Fedor's equation. At a low concentration of aqueous deacetylated gum solution, the G' (viscoelastic) was appeared higher than G'' (viscosity) at frequency ranged from 1 to 10 Hz, but with increases concentration of deacetylated gum solutions G'' line was trend to appear higher than G' line at low frequency region. However, a crossover of G' and G'' lines was observed as the frequencies increased to 1.26, 3.97, and 9.99 Hz for 1.5, 3, and 5% w/w of gum solutions respectively. The concentrated crude gum dispersions 12.5 and 15% w/w were exhibited viscoelastic behavior, in contrast the 10% w/w of crud gum solution in distilled water appeared G'' higher than G' with the crosslink points at the middle of frequency range. The critical concentration C* of deacetylated gum solutions in deionized water, in sodium hydroxide alone, and in alkali with addition salt were determined to be 2.34, 2.37, and 2.41 g/dl respectively. The effect of temperature on rheological behavior was also studied. arabic 8 English 57
Aborawi M. Elgornazi, M. H. Awad, Nouri M. A. Soleiman(2-2020)

In most cases dietary supplements especially in Libya are consumed without prescriptions and the public has very limited any awareness of their health risk. The lack of quality control on numerous brands of dietary supplements in pharmacies of Libya today may result in a serious health problem. The aim of this study is to determine the iron content using a fast and accurate method for quality control of some imported dietary supplements, based on spectrophotometric measurement of iron after complexation with 1, 10-phenanthroline in an acidic medium. Eight types of vitamin supplementary tablets were randomly collected from the Libyan market and analyzed for the iron content. The analysis showed an average value of 61mg Fe/pill for the range of 40.07-112.63 mg Fe/pill. Results showed that 75% of the samples were lower in iron content than that recorded on the dietary products.
Ragiab A. M. Issa(4-2020)