Browsing Qatar University Science Journal - [From 1981 TO 2007] by Title
Now showing items 759-770 of 770
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Water Conditions And Proline Content In Shade And Sun Plants
( Qatar University , 1984 , Article)Different parameters of the water conditions (Water content, water saturation deficit, osmotic pressure of the cell sap and partial osmotic pressure due to sugars), chlorophyll and proline contents were investigated in sun ... -
Water Quality Of The Area West Of Karak City, Jordan
( Qatar University , 1986 , Article)The water quality of some wells, wadis and springs in the area west of Karak City has been evaluated for irrigation and domestic uses, by the application ofWilcox (1955) and Doneen (1961) methods, as well as the standards ... -
Water Relations Of Some Woodlice (Oniscidea) From Arid And Mesic Environments
( Qatar University , 1987 , Article)The desert woodlouse Porcellio evansi from Bahrain and Qatar has a transpiration rate as low or lower than recorded from other desert species. The synanthropic mesic Porsellionides pruinosus has a much higher rate, while ... -
Weed Communities Of Date Palm In Eastern Arabia
( Qatar University , 1992 , Article)The present study deals with the recognition and description of the weed communities of date palm plantations in Al-Hassa Oasis, . Eastern Arabia. Thirty three communities are recognized. They are classified, after the ... -
What is Graph Theory?
( Qatar University , 1982 , Article) -
Whole-rock powders and their analysis by an electron mocroprobe technique
( Qatar University , 2001 , Article)Basic rock powders finder than 100 mesh were fushed in a molybdenum and tungsten boat in nitrogen atmosphere. The fusion technique uses very small amounts of sample which is suitable for rapid analysisof rock sample, ... -
Window Analysis Optimization Of Gas Chromatographic Separation Using Different Polarity Packed Columns
( Qatar University , 1996 , Article)Window diagram theory has been described by Purnell and his research team in various publications. In this paper we apply this theory to optimize a separation of complex mixture containing propylene oxide, 1-hexene, ... -
X-Ray And Electron Microprobe Analysis Of Some Plagioclases From The Jabal Abu Safiyah Intrusion
( Qatar University , 1992 , Article)The Jabal Abu Safiyah is a layered intrusion, which was emplaced within volcanosedimentary rocks. It extends in an arc for about 15 km and displays clear layering. The lower zone plagioclases were studied by electron ... -
y - Irradiation Effect On The Ferroelastic High Temperature Phase In LiKSO4 Crystals
( Qatar University , 1992 , Article)The effect of •y -irradiation on the thermodynamic parameters of LiKSC>4 single crystals, in the high temperature range 300-1000 K, is investigated. The results show that T,; as well as Cp decrease with dose rate. However, ... -
Z1, center orientations and adsorption of atomic halogens at the (001) surfaces of Alkaili Chloride Crystals: DFT Calculations.
( Qatar University , 2004 , Article)An attempt has been made to examine the relative stabilities of Z, center orientations at the surfaces of Be2+, Mg2+ and Ca2+ doped LiCl, NaCl and KC1 ionic crystals as well as the effects of Z, center on the adsorption ... -
Zinc Tolerance and Accumulation in Aspergillus oryzae Penicillium citrinum and Rhizopus stolonifer isolated from Saudi Arabian Soil
( Qatar University , 1997 , Article)Aspergillus oryzae, Penicillium citrinum and Rhizopus stolonifer isolated from Taif soil, Saudi Arabia could survive in a liquid medium containing up to 500 ug/ml Zn. Aspergillus oryzae and Penicillium citrinum were more ... -
استخدام ظاهرة الرنين النووي (ظاهرة موسباور) في مجمال دراسة فخار الآثار القديمة
( Qatar University , 1981 , Article)أصبح استخدام الطرق العلمية الموضوعية لازماً لتأكيد النتائج الذاتية التي يتوصل إليها علماء الآثار، وطريقة طيف موسباور المستخدمة في البحث الحالي تعتبر أحدث الطرق العلمية الفيزيائية التي استخدمت في مجال دراسة الفخار الذي عثرت ...
