تصفح Qatar University Science Journal - [From 1981 TO 2007] حسب العنوان
السجلات المعروضة 339 -- 358 من 770
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INFLUENCE OF HYDROGRAPHIC CONDITIONS ON THE INTERACTION BETWEEN ICHTHYOPLANKTON AND MACROZOOPLANKTON AT KHOR AL-ZUBAIR LAGOON, IRAQ, ARABIAN GULF
( Qatar University , 1999 , Article)The ichthyoplankton of Khor AL-Zubair lagoon consisted of 17 families and dominated by Gobiidae and Engraulidae, due to the hydrological situation of the Khor. The larval fish community of the Khor consisted of resident ... -
The influence of oxygen, partial vacuum, temperature, relative humidity combined with gamma radiation on the mosquito, Culex pipiens complex l. I. Effect of exposure to temperature and relative humidity alone.
( Qatar University , 1993 , Article)The results revealed that a temperature of 10°C was the most effective temperature on pupal mortality of Culex pipiens complex L. followed by 32°C then 20 and 26°C. There was a gradual increase in pupal mortality with ... -
Influence Of Surface Finish Parameters On Corrosion Of Zinc
( Qatar University , 1989 , Article)The effect of surface parameters on corrosion behaviour of pure zinc in sodium sulphate solution was investigated. Surface parameters were determined using a Talysurf surface analyzer, and corrosion testing was performed ... -
Influence of The Activated Qatari Attapulgite Clay Admixture on The Mechanical Properties and Hydration Kinetics of Ordinary Portland Cement
( Qatar University , 2001 , Article)Blended cements are types of cements containing additives other than those used m Portland cement, which have considerable technological interest, because such addition increases the chemical resistance to sulfate and ... -
Influence of the cowpea weevil, callosobruchus maculatus f., and the saw - toothed grin beetls, oryzaephilus surinamensis L. On the moisture content and mould growth in stored grains
( Qatar University , 1986 , Article)Presence of the cowpea weevil, Callosobruchus maculatus F., and the saw-toothed grain beetle, Orvxaephilus surinamensis L., and their propagation in cowpea and wheat, resulted in raising the moisture content of infested ... -
Inherritance of growth and other agronomic traits in two oat (avena sativa l.) Crosses
( Qatar University , 1990 , Article)Evaluating the inheritance of growth traits should assist plant breeders in determining its usefulness as a selection criterion for grain yield improvement. Three oat cultivars, 'Stout', 'Lodi' and 'Marathon' were chosen ... -
Inhibition Effect Of Four Oil Dispersants On Primary Productivity In Qatar Water (Ararian Gulf)
( Qatar University , 1987 , Article)Four major oil dispersant mixtures in seawater wore used to depict their in—situ inhibition ratio to productivity rate of natural phytophanklon populations in Qatar water — Arabian Gulf — during the spring season of 1986. ... -
Inhibition of Aluminium Corrosion in Hydrochloric Acid
( Qatar University , 1993 , Article)The inhibitive effect of oximes, P-diketones and hydrazides, on the corrosion of aluminium in 2M HC1 has been investigated galvanostatically. The results suggest that, in presence of inhibitors, the anode is preferentially ... -
The inhibitive action of sodium castor sulphonate Towards the corrosion of aluminium in Hydrochloric acid
( Qatar University , 1993 , Article)The dissolution of aluminium in 2M HC1 solution in presence of sodium castor sulphonate (SCS) has been studied using thermometric and hydrogen evolution methods. The results showed that the additive retards the dissolution ... -
The Inhibitive Action Of Sodium Soya Sulphonate Towards The Corrosion Of Aluminium In Hydrochloric Acid
( Qatar University , 1993 , Article)The dissolution of aluminium in 2M hydrochloric acid in the presence of sodium soya sulphonate (SSS) as corrosion inhibitor has been studied using hydrogen evolution and thermometric methods. The two methods gave consistent ... -
Inhibitory Effect Of Some Oc —Aminocarboxylic Acids On Corrosion Of Aluminium In Hydrochloric Acid Solution
( Qatar University , 1992 , Article)The corrosion of metallic aluminium in 2N hydrochloric acid solution in the presence of L-alanine, L-tyrosine, L-histidine and L-tryptophan as corrosion inhibitors has been studied using hydrogen evolution and thermometric ... -
Insect Pests Attacking Vegetable Crops in the State of Qatar (Abstract)
( Qatar University , 1982 , Article)The area cultivated with vegetable crops in the State of Qatar reached, during 1979 and 1980, a percentage of about 42.9 % of the total cultivated (or suitable to be cultivated) area. Vegetable crops selected for collecting ... -
Integration technique for neutron source standardization inside A cylindrical water tank
( Qatar University , 1993 , Article)This work deals with the evaluation of neutron irradiation facility. Two (Pu-Be) sources and two (Ra-Be) sources are used. Integration technique by a BF3 detector for neutron source standardization is used. The necessary ... -
Intensive shrimp Penaeus semisulcatus Dee Haan, culture in the Arabian Gulf during the summer
( Qatar University , 1999 , Article)P. semisulcatus juveniles (average weight 9.7g) from Manifa Lagoon on the Arabian Gulf were randomly stocked in tanks (0.8m3) at three stocking density levels (25, 50 and 75 shrimp/m3) in four replicates. The tanks were ... -
The interaction between adults and recruitments in the brachidontes variabilis l. (lamellibranchiata) bed in the bitter great lake, suez canal
( Qatar University , 1992 , Article)The purpose of the present study was to test two hypotheses concerning the interactions between adults and recruitments in the densly-packed assemblages of a population of suspension feeder (Brachidontes variabilis L.) in ... -
Interpretatin of geopotential field anomalies in area Around Sohag, Egypt
( Qatar University , 1995 , Article)The investigated area Ues in the central part of Egypt (around Sohag). The present study aims at obtaining information about the subsurface geological conditions in the area from the analysis and interpretation of both ... -
Interpretation of Gravity Anomalies Due to Lens-Shaped Structures
( 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 ... -
Interpretation Of Three Dimensional Seismic Data In Delineating The Structural Elements At Ras Budran Oil Field, Gulf Of Suez, Egypt
( Qatar University , 1989 , Article)Structural evaluation in Ras Budran oil field was achieved by using the state of art geophysical technology, represented by the 3-D seismic data. Integrated together with the borehole geological and geophysical data. The ... -
Investigation of Magnesium (II), Calcium (II) and Barium (II) Complexes in Aqueous Solution
( Qatar University , 2005 , Article)The ionic association constants, K6, of Mg, Ca and Ba metal ions with succinate, malate and tartrate ligands were conduct metrically determined in water at 25-40°C. The conductometric data were analysed by the Shedlovsky ... -
Investigation Of Single-Update Memoryless Cg-Methods
( Qatar University , 1996 , Article)Two new CG-methods are proposed in this work for nonlinear unconstrained optimization problems which are considered as memoryless Variable Metric (VM) methods. They are derived for the inexact line searches and evaluated ...