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Now showing items 1301-1310 of 1470
Effect Of The Apical Ectodermal Ridge On Mitotic Index In Hind Limb Bud Mesenchyme In Bufo Regularis
(
Qatar University
, 1991 , Article)
The apical ectodermal ridge (AER) was formed at stage 51 of Bufo regularis, it persisted at stage 52 (limb bud acquiring paddle-shaped outline), then it disappeared by stage 53 (first indication of fourth and fifth toes). ...
On the effectiveness of the vlf-em method For ground water prospecting in the Basement terrains, Sinai, Egypt
(
Qatar University
, 1997 , Article)
The VLF-EM method is proved to be an effective, fast and inexpensive tool for ground water prospecting in the basement terrains of Southern Sinai. The resistive shallow alluvial deposits increase the penetration depth of ...
A study of nutrient dynamics in the coastal dunes of northwestern egypt.
(
Qatar University
, 1990 , Article)
Biomass and nutrient cycling are evaluated in sites of Ammophita arenaria and Onoaisvaginalis which are among the most common species growing on the coastal dunes of the western desert of Egypt. Both species accumulate N ...
Evidence of an authigenic origin for palygorskite in a Middle Eocene carbonate sequence from North Qatar.
(
Qatar University
, 1997 , Article)
The "Simisma Member" from the Ras Laffan area in North Qatar is mainly composed of dolomites of shallow marine
origin. Clay minerals contained in the dolomite (average 4%) are mainly palygorskites. There is no indication ...
Preliminary Study on Coral Reef and Its Associated Biota in Qatari Waters, Arabian Gulf
(
Qatar University
, 1999 , Article)
Coral reef grounds and their associated biota m Qatari waters were investigated by Scuba diving. Four selected reef-sites were studied. Coral was presented by 17 species. Descriptive notes of each site and an initial list ...
Magnetic Studies on High - Tc Bi - Pb- Sr - Ca - Cu - O Ceramics
(
Qatar University
, 1997 , Article)
The superconducting material with a nominal composition BiI 6 Pb0 4 Sr2 Ca2 Cu3 Ox has been recently synthesized and characterized by the authors using the Q- factor method. The Q-factor data reported in this work shows ...
Improvement Of The Piecewise Approximation Methods
(
Qatar University
, 1996 , Article)
A piecewise approximation method is described for planar curves. The order of classical piecewise approximations is improved. The method exploits the freedom in the
choice of the parametrization and rises the approximation ...
Analysis Of Al Diffusion In Molten Germanium Induced By Pulsed Nd: Yag Laser Using Sims Technique
(
Qatar University
, 1996 , Article)
In this work the volume diffusion coefficients and profile distribution of Al impurities in molten germanium have been measured using secondary-iron mass spectroscopy (SIMS) technique. Diffusion is achieved with aid of ...
A Spreadsheet Teaching Tool For Analysis Of Pipe Networks
(
Qatar University
, 1997 , Article)
Spreadsheets are used widely in engineering to perform several analysis and design calculations. They are also very attractive as educational tools due to their flexibility and efficiency. This paper demonstrates the use ...
التحصيل اللغوي لدى تلاميذ المرحلة الإبتدائية
(
Qatar University
, 1990 , Article)
التحصيل اللغوي لدى تلاميذ المرحلة الابتدائية في المملكة العربية السعودية
( ملخص البحث )
من الملاحظ أن نسبة كبيرة من تلاميذ المرحلة الابتدائية يعانون من ضعف شديد في مادة اللغة العربية بفروعها ، وهذه النسبة من التلاميذ ...