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Now showing items 31-40 of 109
Dynamic behavior of mixer-settlers
(
Wiley Subscription Services, Inc., A Wiley Company
, 1990 , Article)
A mathematical model has been developed to simulate and predict the dynamic behavior of liquid extraction counter current operations in mixer-settler units. Murphree efficiency has been included in the model. The behavior ...
Analysis of the thermal expansion behavior of oriented polyoxymethylene sheets
(
Wiley Subscription Services, Inc., A Wiley Company
, 1996 , Article)
The applicability of the molecular composite model is extended to include the analysis of the thermal expansion behavior of oriented (anisotropic) polyoxymethylene. The model accounts for changes in the morphological and ...
Diffusion of saturated hydrocarbons in low density polyethylene (LDPE) films
(
Wiley Subscription Services, Inc.
, 1989 , Article)
The diffusion coefficients at zero penetrant concentration, D0, of n-heptane, n-heptane, n-octane, n-decane, and 2,2,4-trimethylpentane (TMP) in LDPE were obtained in the range of 25–50°C, using the desorption method. The ...
Mössbauer study of ZnxNi5/3−xFe1Sb1/3O4 spinel ferrite
(
Springer Verlag
, 1985 , Article)
The antimony substituted nickel ferrite ZnxNi5/3–xFe1Sb1/3O4 with different values ofx are prepared, checked by x-ray and studied with57Fe Mössbauer spectroscopy over a wide temperature range. Characteristic spectra of ...
المحكم في العقيدة : دراسة لأصول العقيدة في القران الكريم
(1999 , Book)
كتاب يلخص الأسس العقدية والإيمانية في ضوء القرآن الكريم .بأسلوب تدريسي مع الخرائط والرسوم التوضيحية
أسس نظرية المعرفة اليقينية بين الفكر الديني والفلسفي
(
دار الحكمة - الدوحة
, 1993 , Book)
المقدمة
هناك معضلة فكرية مهمة تتصل ببنية الحضارة الإسلامية وما تتطلبه هذه الحضارة من أسس ومقومات تقوم عليها، وهي: هل لدى المسلمين مناهج خاصة بهم، اكتشفوها بأنفسهم دون أن تشوبها شائبة مقحمة عليها من الخارج؟ بمعنى هل قامت ...
Synthesis and biological activity of some new 3-and 6-substituted coumarin amino acid derivatives. Part I
(
Wiley-Blackwell
, 1981 , Article)
The synthesis of 6-nitrocouarrain-3-CO-amino acids and their corresponding methyl esters (II-XVII) and some dipeptide methyl esters (XVIII-XXVI) are described. 6-(N-Tosyl- or N-phthalylaminoacyl)aminocoumarin-3-carboxylic ...
Guaianolides from Centaurea sinaica
(
Elsevier
, 1990 , Article & Report)
Three sesquiterpene lactones were isolated from the aerial parts of Centaurea sinaica: amberboin, chlorohyssopifolin A and sinaicin. The latter is reported for the first time.
Major sterol composition of some algae from Qatar
(
Elsevier Science Ltd.
, 1995 , Article)
Thirteen macroscopic algae belonging to the three main divisions Chlorophyceae, Rhodophyceae and Phaeophyceae from the coast of Qatar (Arabian Gulf) were investigated for their sterol composition by using GC-MS coupling ...
Guaianolides from Picris radicata
(
Elsevier Science Ltd.
, 1996 , Article)
The methylene chloride-methanol (1:1) extract of the aerial parts of Picris radicata Forssk afforded two new guaianolides. The structures were established from spectral data.