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السجلات المعروضة 191 -- 200 من 206
Effect of chemical grafting on the surface structure of porous bentonite as a support in gas chromatography
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Qatar University
, 1994 , Article)
The effect of thermal and chemical treatments on the variation of specific surface area of porous bentonite as a support was studied. The surface area of bare bentonite thermally treated at 950°C and then washed with ...
Monovalent Anion Interaction on the Electron Flow of Photosystem II in Soyabean Cells
(
Qatar University
, 1994 , Article)
Steady state of electron transport measurements from water to DMQ (2, 5 - dimethyl - P- benzoquinone) show a maximum bicarbonate effect (about four fold stimulation) following the addition of 5 mM HCO"3 to the previously ...
السيكودراما : مفهومها وعناصرها واستخداماتها
(
Qatar University
, 1994 , Article)
Synthesis and biological testing of 2,4-disubstituted thiazole derivatives as Potential antitumor antibiotics
(
Qatar University
, 1994 , Article)
A series of thiazole derivatives bearing amino, acetamido or thioureido synthons at position 2- and thiosemicarbazone or 1,2,4-triazolethione moieties at position 4- have been synthesized and evaluated for their antimicrobial ...
Geochemistry of the st. Catherine basement rocks, Sinai, Egypt
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Qatar University
, 1994 , Article)
St. Catherine area, dominated by basement rocks encompass old continental gneisses, metasediments, greenstone belt, calc-alkaline granites (G-II-granites), rift-related volcanies (RV), and anorogenic within plate granites ...
التأويل عند ابن تيمية في سياقه التاريخي
(
Qatar University
, 1994 , Article)
Parallel Computing Applied To Compensate The Effect Of Amplifier Bandwidth In The Design Of Switched Capacitor Networks
(
Qatar University
, 1994 , Article)
A method is described for the extraction of capacitor values for switched capacitor (SC) networks which compensate for the effect of finite amplifier bandwidth in the design of SC networks using optimization. The finite ...
Mercury pollution in doha (Qatar) coastal environment
(
Wiley Periodicals, Inc.
, 1994 , Article)
Surface water and sediment samples were collected from the Doha coastal area and analyzed for content of physico-chemical forms of mercury. Dissolved reactive Hg (2.9 ng L?1) represented 81.0% of the total dissolved Hg ...
مدى تأثير تعلم لغات أجنبية قبل الصف الرابع الابتدائى على مستوى النمو اللغوى للطفل في اللغة العربية
(
Qatar University
, 1994 , Article)
Effect of gamma radiation on the morphology and Thermophysical properties of the pollen wall of Phoenix dactylifera L.
(
Qatar University
, 1994 , Article)
Pollen grains of Phoenix dactylifera were exposed to different doses of gamma radiation (250,500,1000 rad and 1 M rad). To access the effect of radiation on the external morphology of the pollen grains, they were examined ...