QU Ceased Journals: المرسلات الحديثة
السجلات المعروضة 1261 -- 1280 من 2240
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Application Of Different Methods For The Preparation Of Chlorophyll Pigments For Food And Pharmaceutical Industries
( Qatar University , 1994 , Article)The main objective of this work is to establish an economic and applied technique for the production of chlorophyll pigments and their derivatives namely Cu-chlorophyll complex in the form of colour additives. These trials ... -
Mineral analysis of soil, euphorbia hirta l. And mycoflora from the industrial Yanbu City, Saudi Arabia
( Qatar University , 1995 , Article)Soil and Euphorbia hirta L. samples were collected from five localities from the industrial Yanbu city Saudi Arabia, and analysed for their metal and fungal flora. Soil type is sandy, alkaline and contained low percentage ... -
Global And Ultravoilet Radiation Over Kuwait
( Qatar University , 1999 , Article)The data of six spectral bands of solar radiation over Kuwait were measured locally, during the period of time starting May 1, 1995 until February 5,1998. Near ultraviolet spectral band (315-380) nm, shows very week ... -
Lead-Induced Malformations and Kidney Destruction of Developing Chick Embryos
( Qatar University , 1993 , Article)Two doses of lead nitrate, 0.5 and 0.1 mg/egg, were injected into the eggs after 3 days of indubation. Lead nitrate increased mortality rate and decreased the body weight of developing embryos. The lead nitrate also decreased ... -
Thermoluminescence And Dielectric Properties Of An X-Ray Irradiated Double Sulphate Crystal
( Qatar University , 1994 , Article)Thermoluminescence measurements and A. C. conductivity o(w) for nonirradiated and x-ray irradiated Potassium Cesium Sulphate, KCSSO4, crystals have been studied. TL reader type Harshaw model 2000 A+B and the impedance meter ... -
Impulse Breakdown Characteristics In Air In The Presence Of A Local Spark
( Qatar University , 1996 , Article)In this paper, we study the flashover phenomena in air gaps containing floating metallic objects. The effect of a local spark on the impulse breakdown characteristics of a model gap arrangement which simulating a gas ... -
Azo-Hydrazo Tautomerism: Further Evidence Based On Polarographic Reduction And Acidity Function Of Some Heterocyclic Compounds Containing Oximino-Group
( Qatar University , 1994 , Article)Potentiometric pKa and polarographic behaviour of l,3-indandione-monoxime-2-phenyl azo and four of its substituted derivatives were investigated in buffer solution of pH -2-12. The results showed that the compounds are in ... -
Modern and Ancient Sabkha Environments -Boron Isotopes as Discriminators of Facies and Uses in Base Metal Exploration
( Qatar University , 1999 , Article)Boron isotopic analyses were performed on samples of stromatolite representative of intertidal conditions within modem and Early Proterozoic sabkhas. The intertidal zone at Al-Khiran in southern Kuwait shows a range of 5^ ... -
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 ...
