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Studies for determining antimicrobial activity of solenostemma argel (del) hayne. 1-extraction with methanol/water in different proportions
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Qatar University
, 1994 , Article)
Aerial parts of Solenostemma argel plant were successively extracted with methanol/water in different proportions (4 fractions). The phytochemical and chromatographic screening as well as quantitative determination of the ...
Abundance Of Insects And Mites Infesting Stored Grain And Animal Feed In Riyadh And Dammam Provinces, Saudi Arabia
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Qatar University
, 1994 , Article)
Insects and mites infesting wheat, maize and wheat bran, stored in plants at Riyadh and Dammam, Saudi Arabia, were scanned in 2 seasons, 1987 and 1988. Grains from the local markets and dust from both provinces were also ...
Total Mercury Distribution In Surface Sediments From The Arabian Gulf
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Qatar University
, 1994 , Article)
Surface sediment samples collected during the first leg of Mt. Mitchell cruise and covering the entire Gulf, were analysed for their total Hg content. The total Hg concentrations ranged from 0.032 to 0.27 ug/g dry wt. The ...
Hepatitis-B Markers In Sera Of Egyptian Hepatoma Patients
(
Qatar University
, 1994 , Article)
The present study was performed on 52 hepatoma patients; 46 of them were of the histopathological type known as hepatic cell carcinoma (HCC), aiming to investigate the possible role of hepatitis B viral (HBV) infection in ...
Biochemical Characterization Of Human Schistosomes And Their Molluscan Hosts By Electrophoretic Techniques
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Qatar University
, 1994 , Article)
The recent application of biochemical techniques in taxonomy markedly improved the specific identification and strain characterization of a wide range of living organisms. These techniques are gradually replacing classical ...
The Models of a General Component of a Distributed Computing Systems Based On Stochastic Petri Nets
(
Qatar University
, 1994 , Article)
In this paper we propose models of a distributed computing system (DCS) based on general stochastic Petri nets (GSPN). We also propose the means to decrease the number of states. We indicate that the complexity of DCS ...
Synthesis of some newer indazolyl-oxadiazoles, thiadiazoles and 1,2,4-Triazoles
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Qatar University
, 1994 , Article)
2-Aryl-3-chloro-2H-indazole (4), obtained in excellent yield (>90%) by the action of thionyl chloride on o-azidobenzanilide(3), was allowed to condense with ethyl p-aminobenzoate to afford the corresponding indazolo-ester ...
Heterocyclo-sulpha drugs: part x. Novel 5-imino-a2-pyrazolin-4-ditfflocarbamyl-s-azo dyes as antimicrobial agents
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Qatar University
, 1994 , Article)
Synthesis of a series of novel azo-sulpha drugs as 5-imino-3-methyl-l-phenyl-A -pyrazolin-4-dithiocarbamyl-s-azo dyes (I-XV) are described by the reaction of 4-sulphamoyl and/or sulphonyl diazonium chloride with ...
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 ...
Synthesis Of Some Glycyrrhetic Acid Sulfonamide Derivatives With Prospected Antimicrobial Activity
(
Qatar University
, 1994 , Article)
Some glycyrrhetic acid sulfonamide derivatives (I-VIII) were prepared. Apart from their chemical structures which were confirmed by elemental analysis, IR, 'H and ^C-NMR, their behaviour under electron impact was also ...