Browsing Qatar University Science Journal - [From 1981 TO 2007] by Title
Now showing items 497-516 of 770
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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 ... -
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 ... -
Pelagic Fish Resources And Their Fishery Around Qatar
( Qatar University , 1983 , Article)The existing pelagic fishery around Qatar is relatively smaller than the demersal fishery. Inshore and offshore gillnetting trolling and even bottom trawling, contribute to the production of pelagic fish species. About 30 ... -
Performance Analysis of a Fileserver in an ATM Network
( Qatar University , 2004 , Article)ATM continues to gain acceptance as a unifying communications technology for traffic of both digital and analog origins. The main characteristic of an ATM network is its discrete time (slotted) operation and fixed-length ... -
Petrochemical Investigation On El Ehena Pluton, Western Al-Quwayiyah Region, Saudi Arabia
( Qatar University , 1991 , Article)The El Ehena area represents a small circular granite intrusion intruded in a metasedimentary sequence. The rocks are coarse grained with hypidomorphic texture and consist mainly of quartz, K-feldspar mostly perthitic and ... -
Petrogenesis And Geochronology Of The Granitic Intrusions Of Gabal Kulyiet And Seiga, South Eastern Desert, Egypt
( Qatar University , 1986 , Article)In the South Eastern Desert of Egypt tonalite. granodiorite and granite intruded intermediate to acidic metavolcanics and volcanogenic metasedimentary rocks of Precambrian age. The geological features of these granitic ...