Qatar University Science Journal - [From 1981 TO 2007]: Recent submissions
Now showing items 381-400 of 770
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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 ... -
ECG Abnormalities Induced By Scorpion Venom Administration: The Effect And The Mechanism
( Qatar University , 1994 , Article)Intramuscular administration of scorpion (Leiurus quinquestriatus) lyophilized venom (100, 200 and 400 mg/kg) into rats produced drastic changes in the electrical activity of the cardiac muscle. These abnormalities were ... -
Genotoxicity and Embryotoxicity of the Insecticide Primicid in Chick Embryo
( Qatar University , 2000 , Article)Growing chick embryos were treated with primicid to examine the cytogenetic and embryotoxic effects of this insecticide. For the cytogenetic assay, eggs were injected through the air chamber with primicid at a concentration ... -
Electrophoretic patterns of proteins and enzymes in paramphistomum (p.) Microbothrium and carmyerius gregarius
( Qatar University , 1990 , Article)The electrophoretic patterns of total soluble proteins, esterases, Glutamic-oxaloacetate transaminase (GOT) and malate dehydrogenase (MDH) are determined in two paramphistomes, infecting cows and buffaloes, namely ... -
Approximating the Distribution of Quadratic Forms Using Orthogonal Polynomials
( Qatar University , 1999 , Article)In this paper we propose some techniques to approximate the distribution of quadratic forms in normal random variables. The first two techniques will be based on orthogonal polynomials, namely; the Hermitte and Laguerre ... -
Preliminary Studies Of The Tidal Currents Near Doha
( Qatar University , 1987 , Article)A systematic program for current observations was planned by the Department of Marine Sciences, University of Qatar to cover the Qatar; waters. The tidal currents were studied by analysing the data obtained from mooring ... -
Aluminium Nitrate As External Absorbent In The Microdetermination Of Carbon And Hydrogen In Organofluorine Compounds
( Qatar University , 1994 , Article)Silica gel loaded with saturated A1(NO3)3- 10. H2O solution proved to be an efficient absorbent for the elimination of the interference of fluorine in the microdetermination of carbon and hydrogen in organofluorine compounds. ... -
Mineralogical and Chemical Properties of El-Fa Youm Clays
( Qatar University , 1993 , Article)El-Batts Demo Area constitutes a part of El-Fayoum province in Egypt, it is dominated by clay formations 17 meters thickness, covered in part by a thin layer of Pleistocene deposits. XRD studies reveal that smectite is ... -
Krein's method for solving the integral equation of the first kind With logarithmic kernel
( Qatar University , 1993 , Article)Consider the Fredholm's integral equation of the first kind with logarithmic kernel K(IXI) = (- In Ixl. The aim of this paper is to establish the equivalence of Krein's method of solving the equation with the following ... -
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 ... -
Evaluation Of Soil And Water Resources In Wadi Wardan, Sinai, Egypt, Using Electrical Resistivity Method
( Qatar University , 1985 , Article)A number of 15 Vertical Electrical Soundings were carried out in the Delta of Wadi Wardan, on the western coastal zone of Sinai, about 55 km south of Suez. The study objectives were to find out the change in thickness of ... -
Calculation Of Mass Yield Distributions In Fission Induced By High Energy Protons
( Qatar University , 1991 , Article)An analytical expression is obtained for the mass-yield distribution in fission induced by high-energy protons, using a two-step model. In the first step, the incident proton penetrates the target nucleus, knocking out ... -
Synergistic effect of amino acids and chloride ion on adsorption On copper metal
( Qatar University , 1994 , Article)The effect of adsorption of a- alanine, P-alanine, DL-aspartic, L-glutamine, iso-leucine and L-lysine in 1 M HC1 solution on the corrosion of copper has been studied using the potentiokinetic technique. The examined amino ... -
On Two New Haemogregarines (Protozoa: Apicomplexa) From Colubrid And Elapidae Snakes In Egypt
( Qatar University , 1996 , Article)Two species of colubrid and elapid snakes collected from different localities in Egypt were examined for protozoan blood parasites. TWo new species of Haemogregarina senso lato are described: Haemogregarina garnhami n.sp. ... -
Records of Marine Interstitial Hymenostomatid Ciliates from the Jubail Marine Wildlife Sanctuary, Saudi Arabia
( Qatar University , 1999 , Article)Sediment samples were collected at low tide from various localities of Jubail Marine Wildlife Sanctuary in the Arabian Gulf during 1996-1997 for the study of the marine interstitial ciliate fauna of the Sanctuary. Eleven ... -
New Potassium/Argon Ages For The Volcanic Rocks Of Halul Island (Qatar)
( Qatar University , 1988 , Article)The only rocks of igneous origin known to be exposed in Qatar are those of Halul and Shra'Auh Islands. They occur within a salt diapir and the age of these rocks is uncertain. They have generally been assigned to the Hormuz ... -
On A Relation Between Two Absolute Summability Methods
( Qatar University , 1997 , Article)In this paper we prove a theorem concerning a relation between the summability methods |R,pn,qnlJt and |R,un|fc , k > 1 , which generalizes a result of Bor [2]. -
A Special System Of Boundary Value Problems
( Qatar University , 1987 , Article)In this paper we introduce a special system of boundary value problems and give a method for solving it. Then we give a detailed application of this method to a system of boundary value problems of Hilbert type. -
Acute Toxicity Of Some Oil Dispersants To Mullet Fry ( Liza Macrolepis) Of The Arabian Gulf
( Qatar University , 1986 , Article)The acute toxicity of Shell LTX, Shell Concentrate, Servo CD 2000 and Exxon OSD 9217 were used to calculate 72 - hr. LC ci\ and toxicity curves to the Mullet Fry ( Liza macrolepis) under the Arabian Gulf conditions (Temp. ... -
Fungi Associated With The Hair Of Goat And Sheep From El-Bahrain
( Qatar University , 1995 , Article)The mycoflora on the hair in 25 samples of each of goats and sheep collected from El - Bahrain was analysed using two isolation methods at 25 !C. Seventy species and 3 varieties belonging to 31 genera were collected from ...
