Browsing Qatar University Science Journal - [From 1981 TO 2007] by Title
Now showing items 492-511 of 770
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Optical Properties Of Oxidated Blown Asphalt Films
( Qatar University , 1996 , Article)Films of purified blown asphalt of high grades of oil and the accompanied adulterated particles derived from its manufacturing process, that is, it was purified 98%. This study focused on optical properties in the wavelength ... -
Organic Petrology Of Oil Shales In Quseir-Safaga District, Egypt
( Qatar University , 1992 , Article)The kerogen and hydrocarbon-generating potential of oil shales from three mining districts in the Red Sea province of Egypt have been investigated using microscopy and elemental analysis. The results reveal that, the ... -
Origin And Tectonic Environment Of The Pan-African Rocks Of Abu El Tiyur Area, Eastern Desert, Egypt
( Qatar University , 1995 , Article)The present paper deals with the geochemistry and origin of the Pan - African basement rocks, which covers about 825 km2 North of Abu El Tiyur area, in the Central Eastern Desert of Egypt. The petrochemical character of ... -
Overhead Allocation: a Goal Programming Approach
( Qatar University , 1981 , Article)Overhead is an incurred cost which is matched against cost objects via an intervening base of allocation. The problem of overhead allocation is to come up with a cost allocation procedure which is objective, applies, ... -
Oxidative Addition Reactions of Sn(II) And Pb(II) with Some Hydrazide And Hydrazone
( Qatar University , 2000 , Article)Bivalent tin compounds can be easily transformed to tetravalent compounds by oxidizing agents. The use of ortho-quinones for oxidation of transition metals has been the subject of many publications, but few analogous studies ... -
p,q Ideal of Operators in Banach Spaces
( Qatar University , 1981 , Article) -
p-cds/n-Si Anisotype Heterojunction solar cells wih Efficiency of 6.4%
( Qatar University , 2005 , Article)In the present paper, p-CdS/n-Si heterojunction solar cells are prepared for the first time by the spray pyrolysis technique. Using such low-cost method, cells with 6.4'/o AM1 conversion efficiency ina O.ZZ fill factor ... -
The P-Center And The P-Median Problems In Graphs With Small Number ' Of Spanning Trees
( Qatar University , 1996 , Article)In this paper, we will describe some algorithms and give their complexity as following: (1) The algorithm for finding a dominating set of radius r in a vertex-weighted graph with small number of spanning tress. The ... -
A Packed Column Gas Liquid Chromatographic Method For Characterization And Determination Of Unsaponifiable Matter In Oils
( Qatar University , 1991 , Article)A packed column GLC method for the detection and determination of the components of unsaponifiable matter in oils is described. Squalene, 8 -tocopherol and short chain hydrocarbons with up to 26 carbon atoms are determined ... -
Palaeozoogeography of Shallow Marine Ostracoda from Holocene Sediments-Southern Iraq
( Qatar University , 1999 , Article)The Holocene palaeozoogeography of southern Iraq (Southern Mesopotamian Basin) have been studied according to the distribution of thirteen species of shallow marine ostracoda belonging to twelve genera. Their distributary ... -
Paleoecology, palynofacies, thermal maturation and hydrocarbon source-rock potential of the Jurassic-Lower Cretaceous sequence in the subsurface of the north Easern Desert, Egypt
( Qatar University , 1997 , Article)The Jurassic to Lower Cretaceous sequences in the wells Abu Hammad-1, Q-71-IX and Kabrit-1, north Eastern Desert of Egypt, have yielded palynofacies assemblages of varying composition. Seven palynofacies types which are ... -
Paleozoic Igneous Activity In Egypt
( Qatar University , 1989 , Article)Based on available isotopic age data, including a few K/Ar ages obtained by the writer, a geochronological sequence of the main phases of igneous activity in Egypt during the Paleozoic is presented. Five main phases at ... -
Pan African Basement Of Bir Safsaf Area East Sahara African Craton
( Qatar University , 1994 , Article)Bir Safsaf area occurs at the extreme southern part of the Western Desert of Egypt. It is covered by the Pan African Basement represented by the old continental gneisses and migmatites comprising granitic, granodioritic ... -
Pan African magmatism in the Zabara District, Central Eastern Desert, Egypt: Geochemistry and Petrogenesis
( Qatar University , 1997 , Article)The rocks of the Zabara district include ophiolitic and non-ophiolitic sequences. The ophiolitic ones are metagabbro and metabasalt associated with metasediments, whereas the non -ophiolitic sequence includes intermediate ... -
Paragorgorhynchus aswanensis n.sp. (acanthocephala: Echinorhychidae): an intestinal parasite of some fishes from aswan high dam lake in upper egypt
( Qatar University , 1990 , Article)Paragorgorhynchus aswanensis n.sp. is described, both by light and scanning electron microscopy, from Lates niloticus,, Clarias lazera, Bagrus bayad, B. docmac, and Tetraodon fahaka, caught from the Aswan High Dam Lake in ... -
Parasites As Biological Tags In Population Studies Of Marine Organisms
( Qatar University , 1999 , Article)Parasites have been used to identify and trace the migrations of different intraspecific populations of commercially important marine fish since 1939, Literature research shows how the numbers of publications involving ... -
Parasites As Indicators Of Environmental Change And Pollution In Marine Ecosystems
( Qatar University , 1999 , Article)Good biological indicators to monitor the effects of pollutants on marine organisms must be exceptionally sensitive to environmental change so that a significant reduction in their numbers can be used as a warning of ... -
Parathormone, Calcium And Phosphorus In Autotransplanted Parathyroid, Total Thyriodectomized Patients
( Qatar University , 1995 , Article)The success of parathyroid autotransplantation was indicated by the postoperative assay of serum parathormone in thirteen out of fourteen patients to whom total thyroidectomy was carried out because of thyroid cancer during ... -
Partial characterization Of an alkalophilic extracellular Crude pectinases from a bacillus Polymyxa strain
( Qatar University , 1999 , Article)A mesophilic spore forming isolate from the soil of Um-Qais region, which could produce extracellular pectinases was tentatively identified as Bacillus polymyxa. This bacterium grew best at 37°C and pH 7.0 and was able to ... -
Partial Connection : A New Approach To Improving The Bandwidth Of Banyan Networks
( Qatar University , 1995 , Article)Banyan networks have been proposed as interconnection networks for large multiprocessors, those containing hundreds or even thousands of processors. Their attractiveness is attributed to two features : low manufacturing ...