Browsing University Publications by Title
Now showing items 618-637 of 4415
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Ecotoxicological assessment of two surfactant on the emryonic development
( Qatar University Press , 2021 , Poster)In this study, zebrafish (Danio rerio) embryos was served as a model for marine fauna to determine if there is any potential of organ-specific toxicity (neuromuscular, hepatic, cytotoxic, and cardiac) caused by Silicone-Q-22 ... -
Edaphic Gradients And Species Attributes Influencing Plant Distribution In Littoral Salt Marshes Of Qatar
( Qatar University , 1994 , Article)Edaphic gradients of moisture and salinity are critical environmental stresses that seriously influence littoral salt marsh flora, and determine the zonation of coastal vegetation. Shoreline communities subjected to severe ... -
Edaphic properties and soil cyanobacteria of South Western Saudi Arabia.
( Qatar University , 1997 , Article)Three sites at each of five localities, in the South Western Region of Saudi Arabia were surveyed during 1992, for their soil physico-chemical properties, and cyanobacterial communities. The soils were moderately calcareous, ... -
Educational Performance of Students In A New College Of Engineering: A Computer-Aided Study
( Qatar University , 1989 , Article)A data-base computer package is herein developed to provide an effective tool lor llie studv. evaluation and rectification of tile academic performance of university students. As a test case, the newly established Faculty ... -
An educational view of change in family life and development of children in the Arab States
( Qatar University , 1984 , Article) -
Edward Said Orientalism and its critique of Edward Lane.
( Qatar University , 1993 , Article) -
The effect if different types of feeback on the Qatari Students' achievement
( Qatar University , 1985 , Article)The effect of verbal/written (A), Individual/group (B) types of feedback and their interaction (AB) on achievement was investigated. The subjects were 68 Qatari undergraduate females enrolled in the author's course on ... -
Effect Of "Ethrel" On Colour Development And Juice Quality Of Sweet Oranges And Grapefruits
( Qatar University , 1994 , Article)"Ethrel" was sprayed at 0,120, 420 and 480 ppm on sweet orange and grapefruit trees at fruit maturity stage to improve colouring and juice quality. Changes in fruit colour were observed in both varieties but the results ... -
Effect Of Adsorption Of Tetrabutylammonium Chloride In Polarography
( Qatar University , 1994 , Article)The polarographic behaviour of chromate, iodate and zinc has been investigated in the presence of different concentrations of tetrabutylammonium chloride in 0.1 M Na2SO4 and 0.1 M H2SO4. The effect of organic compound on ... -
Effect of Alkaline Activators on the Mechanical Properties of Geopolymer Mortar
( Qatar Univesrity Press , 2020 , Conference Paper)"Geopolymerization is a process where silica and alumina rich source materials turn into excellent binding materials by the aid of alkali solutions. Materials such as fly ash are by-products in energy power plants. Fly ... -
Effect Of Aspect Ratio On Torsional Capacity Of High-Strength Plain Concrete Deep Beams
( Qatar University , 1993 , Article)Twenty high-strength plain concrete deep beams were tested under torsion. The variables were concrete strength and depth/width (aspect) ratio. Concrete strengths of 51.01, 58.53, 76.60 and 83.66 MPa and depth/width (aspect) ... -
The Effect of Bibliotherapy in Reducing Test Anxiety Among Jordanian College Students
( Qatar University , 1997 , Article)The purpose of this study was to investigate the effect of bibliotherapy upon reducing test anxiety among Jordanian college students. Fifty five (55) Participants were randomly assigned either to experimental or controlled ... -
Effect Of Ca++ And Mg++ On The Binding Of Cytoplasmic And Nuclear Estradiol Receptors In Breast Cancer Of Female Patients
( Qatar University , 1993 , Article)Specific estradiol receptors were quantitatively determined in the cytosol and nuclear fractions of four cancerous breast tissues and one normal uterus. Validated methods are described for estradiol receptor assay. The ... -
Effect Of Carbon disulphide, Acrylonitrile And Formaldehyde On Egyptian Paddy Grain-Borne Fungi
( Qatar University , 1988 , Article)Fumigation, with various doses of carbon disulphide, acrylonitrile and formaldehyde for 8, 16 and 32 hours, of paddy grains indicate that formaldehyde was more toxic to the fungi than carbon disulphide and acrylonitrile. ... -
Effect Of Cationic And Anionic Surfactants On Electrokinetic Potentials Of Cassiterite And Quartz In Presence Of Polyvalent Cations
( Qatar University , 1994 , Article)The effect of different polyvalent electrolytes (FeCl3, AICI3, LaCl3, CeCl3 and TI1CI4) on adsorption of different surfactants (primary amine hydrochloride, sodium oleate, sodium dodecyl sulfate and phenyl disodium ... -
Effect of chemical grafting on the surface structure of porous bentonite as a support in gas chromatography
( 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 ... -
Effect of Chemicals on Compressive Strength of Plastic-Laterite Interlock Paving Blocks
( Qatar University Press , 2023 , Conference Paper)This research centres on the need to develop a simple but sustainable material for the utilization of the quantum of plastic wastes that litter our environment. The research uses waste plastics and laterite soil and converts ... -
Effect Of Cobra Naja Haje Venom On The Adrenal Activity In Rabbits
( Qatar University , 1989 , Article)Injection of rabbits with a sublethal dose (0.2mg/kg) of Naja haje venom induced an increase in serum cortisol, free cholesterol, glucose and potassium ions. A decrease in total cholesterol and sodium ions was observed ... -
Effect Of Culture Conditions On The Production Of Growth Regulators And Extracellular Enzymes By Streptomyces Olivaceoviridis
( Qatar University , 1996 , Article)It was proposed to find out the optimum environmental conditions and nutritional requirements for highest growth regulating substance and enzyme production by Streptomyces olivaceoviridis. The optimum oc-amylase and ... -
The Effect of Cutting Height on Forage Yield and Performance of Alfalfa Cultivars
( Qatar University , 1999 , Article)Six exotic alfalfa (Medicago sativa L.) cultivars were evaluated for their forage yield performance and persistency under different cuttings heights during 1991/1992 in UAE. Cultivars revealed a highly significant difference ...