Browsing Qatar University Science Journal - [From 1981 TO 2007] by Publication Date

Now showing items 21-40 of 770

    • Geomorphology of the Nagada Region Upper Egypt 

      Yehia, M. A. [محمد عادل يحيى] ( Qatar University , 1982 , Article)
      Detailed geomorphological study of the Nagada region, west of-the Nile enables us to better understand the main landfonns in this part of Upper Egypt. Six geomorphic features are recognized including: the Thebaid plateau; ...

    • Mossbauer Effect Study of the Cations Distribution and its Influence on the Electric Field Gradient of the Cdx Co1-x Ferrite System 

      Eissa, N. A. [نبيل عيسى]; Sallam, H.A.; Salah, S.H.; Goma, S.S. ( Qatar University , 1982 , Article)
      In the ferrite system Cd,Co,_x Fe; 04 (X=0.0, O.I, 0.2, ....... , 1.0). it was found that the introduction of Co2'1' decrease the EFG at the octahedral B-site. This was attributed to the distributions of the different ...

    • Generalized Airy's- and taylor Integral Functions 

      Gabr, M. K [محمد كامل جبر]; Shalem, Sh. ( Qatar University , 1982 , Article)
      In this paper a generalized form of Airy's function has been estimated and an asymptotic expansion for one of its types is obtained. Furthermore, an improved formula could be induced to acquire the asymptotic expansion of ...

    • Studies on Soil Cements : 2 — Physicochemical Properties of the Hardened Soil Cement Pastes. 

      Abo El Enein, A.; Abdel-Moez, M.S.; Mikhail, R. Sh.; Hekal, E.E.; أبو العينين, صلاح عبد الغني; عبد المعز, محمد سمير; ميخائيل, رؤوف شاكر; هيكل, عيسى السيد... more authors ( Qatar University , 1982 , Article)
      Various hardened soil-cement pastes were prepared from dry mixtures of montmorillonite clay and portland cement clinker by using different W/C ratios of 0.20, 40, 0.60 and 0.80 and cured in air for various ages. Compressive ...

    • What is Graph Theory? 

      Al Wahabi, Kais A. [قيس الوهابي] ( Qatar University , 1982 , Article)

    • A Two-Point Boundary Value Problem for a Second Order Differential Equation with Parameter 

      Goma, I. A.; .جمعه, أ. أ ( Qatar University , 1982 , Article)

    • Microfacies of the Upper Cretaceous-Lower Tertiary Rocks of Um Rijam Area, South Jordan 

      Youssef, M. I. [مراد يوسف] ( Qatar University , 1982 , Article)
      This paper deals, for the first time, with the microfacies of the Upper Cretaceous - Lower Tertiary rocks of south Jordan. Twenty three microfacies associations are recognized, described, discussed and illustrated. This ...

    • Demersal Fish Resources Around Qatar 

      Sivasubramaniam, K. [ك. سيفاسبرامانيام]; Ibrahim, Mohamed Amin ( 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 ...

    • On Using the One-Exposure Method for Stress Measurements by X-Rays in Technology and Scientific Research 

      Saleh, H.A.; Kraus, I. ( Qatar University , 1982 , Article)
      The paper discusses the connection between macroscopic internal stresses and the technological character of technical materials. The basic theoretical relations which are used with X-Ray tensiometry of macroscopic internal ...

    • The Complexation of Lanthanides by Azo-B-Diketones Stability Constants 

      Abdel Moez, M. S.; El-Anani, G. A.; Ramadan, A. A.; El-Shetary, B. A.; عبد المعز, محمد سمير; العناني, جابر; رمضان, عاطف; الشطيري, بشير... more authors ( Qatar University , 1982 , Article)
      The stability constants of the complexes between the trivalent lanthanide series of cations and series of azo-B-diketone ligands are reported. The measurements were conducted at 30°C and zero ionic strength (free KN03), ...

    • Interpretation of Gravity Anomalies Due to Lens-Shaped Structures 

      El Awady, M. M. [محمد محمد العوضي] ( Qatar University , 1982 , Article)
      One of the interesting exploration problems in hydrogcology is finding subsurface geological lens-shaped structures. This paper deals with the interpretation of such structures using their gravity anomalies. A master curve ...

    • Petrographic Studies of the Alamein Dolomite (Lower Cretaceous) in El-Razzak Oil Field, Western Desert, Egypt 

      El Din, M. Y. Z. [محمود يسري زين الدين]; Abul-Fetouh, M. A.; Sadek, R. ( Qatar University , 1982 , Article)
      The origin and environment of deposition of the Alamein Dolomite in the El-Razzak Oil Field have been investigated by means of petrographic, chemical and X-ray analysis. The studied rocks are composed of dolomite with ...

    • Effect of some Vegetable Plant Hosts on the Biological Responses of Brevicoryne Brassicae (L) and Aphis Gossypii (Glover). 

      Eissa, I. S. [ابراهيم سليمان عيسى] ( Qatar University , 1982 , Article)
      The influences of these different vegetable plant hosts on the biological response of Brevicoryne brassicae (L) and Aphis gossypii (Glover) were studied. The results obtained for B. brassicae (L) indicated that the lowest ...

    • A Note on Norland Summability of Fourier Series 

      Ali, Ziad Rushdi; علي, زياد رشدي ( Qatar University , 1982 , Article)
      In this paper we consider point-wise summability in the Norlund sense of Fourier series by assuming H(n) . F(n) = o (Pn) as n--+ oo, where (H(x) = d.x g(t) dt, g(t) is continuous, non-increasing, H(x) is slowly varying, ...

    • Morphometry of Desert Wadi Drainage on the West Bank between Danffq and Dallas, Luxor-Qena Region, Egypt. 

      Hassan, F. A. [فكري حسن]; Hamroush, H.; Abdallah, A.M.; Yehia, M. A. ( Qatar University , 1982 , Article)
      Quantitative measurements of lineation and morphometric analyses of 24 wadi drainage basins on the west bank of the Nile between Danfiq and Ballas. Luxor-Oena region, reveal that (1) the drainage lines are mainly perpendicular ...

    • Coralline Algae from the Neoegne and Pleistocene Sequence of Mersa Alam, Red Sea, Egypt. 

      Khalifa, H [حامد خليفة محمد]; Boukhary, M. A. ( Qatar University , 1982 , Article)
      Ten speciecs of family Corallinaceae (Coralline Algae) are herein recorded and described for the first time from the stratigraphic sequence of Mersa Alam, Red Sea, Egypt. Of these, Amphiroa knolli, Jania johnsoni and ...

    • Blood Gases of some Skink Lizards 

      Eissa, Said M. [سعيد محمود عيسى]; Ihmied, Younis M. ( Qatar University , 1982 , Article)
      (1) Po2 and Pco2 of arterial and venous blood are studied in three skink lizards: the bean skink, Mabui quinquetaeniata, inhabiting the cultivated areas, and the two burrowing desert lizards; the ocellated skink, Chalcides ...

    • Studies on digenetic trematodes of some red sea fish 1. General survey 

      Soud, M.F.A. [محمد فتحي عبد الفتاح سعود]; Ramadan, M. M. ( Qatar University , 1983 , Article)
      812 Red Sea fish, belonging to 33 species, were examined for digenetic trematodes. All species of fish were infected with one or more genera of trematodes. Out of 812 fish, 394 (48.5%) were positive. The incidence of ...

    • Seasonal Fluctuation Of Non-Rhizosphere Soil Fungi In Wheat Fields In Egypt 

      Mazen, M.B. [محمد بهي الدين مازن]; Shaban, G. M. ( Qatar University , 1983 , Article)
      The study aims at intensive survey of fungal floras of non-rhizospheric soil in wheat fields in El-Minya Governorate over the periods December 1976 - May 1977 and December 1977 - May 1978. At 28°C, using 1% glucose-Czapek's ...

    • Pelagic Fish Resources And Their Fishery Around Qatar 

      Sivasubramaniam, K.; Ibrahim, M. A. ( 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 ...