تصفح Qatar University Science Journal - [From 1981 TO 2007] حسب العنوان
السجلات المعروضة 148 -- 167 من 770
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Demersal Fish Resources Around Qatar
( Qatar University , 1982 , Article)The study was based on the data available from Fishery Resources Survey in the Gulf and Gulf of Oman, conducted by F.A.O., between 1975 and 1979 and the samplings of the fish production in Qatar during 1980/81. The survey ... -
Density and diversity of the desert Arthropoda of Qatar
( Qatar University , 1997 , Article)Density and diversity of arthropods were studied at different habitats of the Qatari desert. Diurnal sampling was conducted at two seasons of the year, the end of the dry season, at the beginning of autumn (October) in ... -
Design And Implementation Of A Microprocessor Controlled Digital Filter
( Qatar University , 1991 , Article)The construction and implementation of a microprocessor controlled real time recursive digital filter have been given. The system designed could also be applied to a variable coefficients system such as ADAPTIVE FILTER and ... -
Design and Performance Evaluation of a High Speed Transport Protocol
( Qatar University , 1994 , Article)Transport protocols that were designed for network today are not adequate for high speed networks of the future due to the increase in network bandwidth relative to the speeds of the processor components. As a result, 100 ... -
Detection Of Small Amounts Of Lard In Other Animal Fats
( Qatar University , 1993 , Article)The composition of fatty acids at the b-position (B-FA) and a, a' -positions of the. triacylglycerol was used to establish new criteria for the detection of small amounts of lard in other fats. Determination of P-FA was ... -
Developmental anatomy of the central nervous system of the cotton leaf worm, spodoptera littoralis boisd.
( Qatar University , 1983 , Article)The central nervous system, C. N. S., of the cotton leaf worm, Spodoptera littoralis (B.) develops from a median row of embryonic neuroblasts which divide repeatedly to form a double ganglionic chain. The two chains fuse ... -
Diagenesis of the middle eocene "nummulite bank" of The giza pyramids plateau, Egypt: petrologic and 18o/16o evidence
( Qatar University , 1994 , Article)The Middle Eocene "nummulite bank" of the Giza Pyramids Plateau has been extensively altered diagenetically. The result of a study involving petrography, cathodoluminescence, and 18O/160 and 13C/12C data, provide information ... -
Diagenetic Trends In The Pleistocene Calcareous Ridges, Mersa Matruh Area, Egypt
( Qatar University , 1993 , Article)Ooids are a major constituent of the Pleistocene carbonates along the northwestern coastal ridges of Egypt. For a detailed diagenetic study of the rocks, the Mersa Matruh area was selected. Petrographic examination shows ... -
Diagonalizable Indefinite Integral Quadratic Forms
( Qatar University , 1991 , Article)This paper deals with some special cases on Hasse's principle about the diagonalization of Z-lattices L of indefinite regular guadratic forms over Q. It is asserted that for some specific values of a certain set D of ... -
Diffuse Phase Transition In Non-Stoichiometric LiRbSO4 Crystals
( Qatar University , 1992 , Article)The influence of changing the ratio of Li2S04 on the structure transition of (RbxLi1-x)2S04 , LRS crystals, where x ranged from 0.1 to 0. 7, was studied by thermal analysis techniques in the temperature range 300 - 600 K. ... -
Diffusion Problems Arising In Mathematical Biology 2
( Qatar University , 1996 , Article)In this paper we consider long range diffusion, examine the local behavior of epidemics in Lp'q. In section 1 of chapter 2 we develop a model, the long range diffusion pressure in planktonic patchiness and then in secion ... -
Dinoflagellate Cysts and Miospores from the Albian - Cenomanian Sequence of the Qarun 2 - 1 Borehole, Western Desert, Egypt
( Qatar University , 1993 , Article)Rich distinctive dinoflagellate cyst assemblages together with significant numbers of miospores were recovered from seven cuttings samples in the Qarun 2 - 1 borehole between 2718 - 2854 m. This association represents a ? ... -
Direct Electrochemical Synthesis of Mono, Bi And Polynuclear Complexes of Some Hydrazide and Hydrazone Derivatives
( Qatar University , 2000 , Article)Transition metal complexes of mono-, di- and tetrahydrazides and their hydrazones have been prepared by electrochemical techniques using the metal as a sacrifical anode. The electrochemical oxidation of Co, Ni and Cu in ... -
Discrimination of Coastal Sediments around Qatar Peninsula, Using Remote Sensing Techniques
( Qatar University , 1999 , Article)This paper aims at demonstrating the usedfulness of remote sensing techniques in identifying various types of coastal sediments around Qatar Peninusla. In this respect, Landsat-Thematic mapper (TM) multispectral data provide ... -
Disign and Implementation of a System for Visual Programming
( Qatar University , 1999 , Article)The aim of the project of this paper is to design and implement a system for visual programming, based on data flow graphs. Data flow is applicative and based on transformations on data flowing through a graph. The system ... -
Distribution And Mineralogy Of The Clay Deposits In Saudi Arabia
( Qatar University , 1993 , Article)The main goal of this paper is to characterize the mineral clay deposits in Saudi Arabia; especially their mineral composition, deposit size, geological setting and possible uses. Different published reports and papers on ... -
Distribution, Genesis And Thermal Behaviour Of Clay Minerals In The Miocene Argillaceous Rocks In Qatar, Arabian Gulf
( Qatar University , 1989 , Article)XRD and DTA were utilized to investigate quantitatively the clay-mineral composition of the argillaceous rocks in four Miocene stratigraphic sequences located in western and southwestern Qatar. These rocks belong to the ... -
Diversity, Habitats and Seasonal Distribution of Fish in Three Protectorates of Southern Sinai on the Red Sea, Egypt
( Qatar University , 2000 , Article)The present investigation is an attempt to study the diversity, habitats and seasonal distribution offish of inshore water at thirteen sites of the three Protectorates (Ras Muhammed, Nabq and Abou Galoum) of Southern Sinai ... -
Does Egypt Represent an Ecological Limit to Desiccation Tolerant Plants?
( Qatar University , 2006 , Article)A search of arid areas adjacent to the Nile in Egypt revealed a notable lack of desiccation tolerant vascular plants on ecological sites on which they would be abundant in Kenya and further south in Africa. Relative water ... -
Dominance Value And Community Production Of Desert Arthropoda In Qatar
( Qatar University , 1999 , Article)Diurnal sampling of epigeal Arthropoda from different desert habitats in Qatar was carried out at the end of the summer season (October) and in spring (April) of 1995, 1996 and 1997. Dominance values of the species collected ...
