QU Ceased Journals: المرسلات الحديثة
السجلات المعروضة 1421 -- 1440 من 2240
-
The Backlund Transformation Of A Kp-Like Class Of Nonlinear Partial Differential Equations
( Qatar University , 1996 , Article)The Backlund transformation of a class that behaves in a manner similar to that of the Kadometsev-Petviashli is derived via the use of a transformation that couples this class with a modified given class of the same order. ... -
On Some Shrinkage Techniques For Estimating The Parameters Of Exponential Distribution
( Qatar University , 1986 , Article)A variety of shrinkage methods have been proposed for estimation of some unknown parameter by considering estimators based on a prior guess of the value of the parameter. We compare some of the shrunken estimators for the ... -
Preliminary sequence stratigraphy and tectonic evolution of the Tokar Delta, (Southern Sudanese Red Sea)
( Qatar University , 2007 , Article)The study area comprises about 2500sq.Kms. From the seismic data acquired by the Oil Companies (Chevron 1975-76 Total 1980 and IPC 1992), thirty two seismic lines were selected Fig (2). Also synthetic seismograms of Suakin-1, ... -
Contribution of the Fungal Flora and Mycotoxins of Some Canned Tomato Paste Samples
( Qatar University , 1994 , Article)Twenty-two species belonging to seven genera were isolated and identified from 21 tomato paste samples on glucose-Czapek's (5 genera and 14 species) and 10% NaCl-glucose-Czapek's (6 genera and 17 species) agar media, at ... -
Mineralogical and Geochemical Compositions of Modern Bivalve Shells from The Mediterranean Coast Of Egypt
( Qatar University , 1993 , Article)The stable isotopic (8 ^C and 8^O) and elemental (Sr and Mg) compositions are presented for marine mollusc Carditacea and Solenacea shells collected off the Mediterranean coast of Egypt. Based on shell microstructures and ... -
Biosynthesis of Single Cell Protein (SCP) By Yeasts from Crude Chicken Waste
( Qatar University , 1993 , Article)Three strains of yeasts have been grown on media consisting of Chicken waste (CW) as a sole source of carbon and nitrogen in different concentrations. The nutrient medium which contains 2% CW extract was found to be the ... -
Preparation, Characterization and Structural Determination of some coordination compounds of quadridentae thiosemicarbazone
( Qatar University , 2004 , Article)New transtion metal complexes of Co", Ni" and Cu" with benzil bis 4-(p-Chlorophenyl-thiosemicarbazone) and benzil bis 4-(p-Bromophenyl-thiosemicarbazone) were synthesized. Attempts were made to ascertain their probable ... -
Copper Complexes Of Di-, Tri-, And Tetra-Peptides Containing Tryptophan, Histidine And Arginine
( Qatar University , 1983 , Article)Fifty Seven copper complexes of di-, tri-. and tetra-peptides containing tryptophan, histidine and arginine are studied spectrophotometrically. The ^a, and colour of the complexes are dependent on the sequence of the amino ... -
Acid-Base Status Of Blood Of Varanus Griseus And Uromastyx Aegyptius
( Qatar University , 1984 , Article)1) A comparative study was carried out on the acid-base status of blood collected from five main blood vessels of two desert lizards, the monitor, Varanus griseus, and the dabb, Uromastyx aegyptius. 2) Blood of the monitor ... -
Nature Of The Aflatoxin B, - Induced Inhibition Of Photosynthesis In Chlorella Fusca (Chlorococcales, Chlorophyta)
( Qatar University , 1994 , Article)Treatment with Aflatoxin E^ (AFBi) resulted in inhibition of photosynthetic oxygen evolution in Chlorella fusca Shih.et Krauss. Treatments also induced a marked reduction of both chlorophyll and carotenoid contents. ... -
Elliptic surfaces over a genus 1 curve with the pair (l3, l9) of singular fibers.
( Qatar University , 2000 , Article)In this paper we give a classication of all minimal elliptic surfaces (n : E —> C, g(c) = 1) with a section and exactly the pair (L, L)) of singular fibers. -
Conditionally Exponential Convex Functions On Locally Compact Groups
( Qatar University , 1993 , Article)The main objectives of this study are: 1) The construction of a compact base for the convex cone of all conditionally exponential convex functions. The determination of the extreme parts of this cone. -
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 ... -
Changes in Copepod Community Structure in Response to Land-Based Activities along Alexandria Coastline, Mediterranean Sea
( Qatar University , 2000 , Article)Along the coastal water of Alexandria, Copepods were collected from four different areas subjected to agricultural/industrial mixed discharge, primary treated sewage flow, industrial effluent and agricultural runoff to ... -
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 ... -
Path planner for a mobile shape-changeable intelligent bobot in A 3-dimenxional environment
( Qatar University , 1995 , Article)This study deals with the path planning problem in robotics. This problem is a basic problem to solve some pre-specified task, and then controlling the robot as it executes the commands necessary to achieve its goal. This ... -
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 ... -
Seasonal Fluctuations Of Certain Species Of Nocturnal Coleoptera As Indicated By A Light Trap At Quena
( Qatar University , 1985 , Article)1) One light trap of Robinson type fitted with a mercury vapour bulb was operated for two consecutive years. Eighty - three species were identified and counted. The most abundant species was Tachys fumigatus of which over ... -
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 ...
