Browsing Qatar University Science Journal - [From 1981 TO 2007] by Title
Now showing items 95-114 of 770
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Cloning and Expression of Methionine-enriched Glycinin GY4-Genes in E. Coli
( Qatar University , 2002 , Article)Cloned cDNAs encoding glycinin subunit GY4 was modified to increase methionine content. The effect of the modification was evaluated using an in vitro transcription / translation system. The modifications were carried out ... -
Coccoliths From Some Paleogene Rocks In The Gulf Of Suez Area, Egypt
( Qatar University , 1992 , Article)This paper describes and illustrates the calcareous nannoplankton (coccoliths) recorded in 240 samples collected from the Paleogene rocks in Wadi Belayim/Wadi Nukhul surface sections. Gulf of Suez area. Egypt. Thirty species ... -
The Coliform Bacteria in the Wastewater Ponds of Doha City, Qatar
( Qatar University , 2003 , Article)The microbiological study of the wastewater and its sediment around Abu-Hamour pond (untreated wastewater pond) and Abu-NakhIa pond (treated wastewater pond), located on the outskirts of Doha City, revealed that coliform ... -
Collineations Of Polar Spaces
( Qatar University , 1990 , Article)In this paper we consider general embeddable polar spaces with Witt index at least three. If π : S( ξ) —> S( ξ’) be a thick collineation between polar spaces with i( ξ) =i( ξ’) ≥3. Then there exists a place Ø: k—> k' U ... -
Combined effects of gamma radiation and Some physical factors on the rate of development of culex pipiens complex(L)
( Qatar University , 1993 , Article)The present work deals with the role of some physical factors, applied separately or combined with gamma radiation on the Fj rate of development of Culex pipiens L. when treated in the pupal stage. The results showed no ... -
Combined effects of oxygen, partial vacuum, temperature, humidity and gamma radiation on mating competitiveness of culex pipiens complex l. Males
( Qatar University , 1993 , Article)When the pupal stage of Culex pipiens complex L. male mosquito was exposed to gamma radiation (60 Gy), oxygen, partial vacuum (0.1 torr), low temperature (10°C), for one or two hours, or low humidity (31% R. H.) for 3 ... -
The Commercial Value of Fish at Fasht Ad-Dibal and its Associated Biota in the Qatari Waters, Arabian Gulf
( Qatar University , 2007 , Article)The present study is an attempt to study the fish diversity of Fasht Ad-Dibal in the north-western coast of Qatar. Thirty three species belonging to 25 families were caught using gill nets, gargoors (metal traps) and hand ... -
Common fixed Points for Multimaps in Menger Spaces
( Qatar University , 2007 , Article)The aim of this paper is to obtain a common fixed point theorem for multivalued mappings in Menger spaces. Of course this is a new result in Menger spaces. 2000 Mathematics Subject Classification: 47H10, 54H25. -
Comparative Development Studies On The Lateral Canal System In Cyprinus Carpio And Gambusia Affinis Affinis
( Qatar University , 1990 , Article)The lateral line canals and the neuromasts situated inside their lumina are described in two fishes differing in their feeding habits. There are 20 canal neuromasts in the bottom feeder Cyprinus carpio, while in the surface ... -
Comparative Growth Performance and Feed Utilization of Four Local Strains of Nile Tilapia (Oreochromis niloticus L.) Collected From Different Locations in Egypt
( Qatar University , 2003 , Article)Brood stocks of Nile tilapia (Oreochromis niloticus L.) were collected from Lakes ofNasser (Aswan), Manzalah, Maryut and Abbassa fishponds. Fingerlings ofFI of each strain was fed diet containing 27% CP for 90 days. The ... -
Comparative Histopathological Studies On The Effects Of Ionizing X-Ray Irradiation On Normal Liver And Hepatoma
( Qatar University , 1984 , Article)Normal mice exposed to X-rays showed distinct external symptoms and died mostly on the 13th or 14th day after irradiation. Pathological symptoms were more exaggerated in mice diseased with hepatoma and subjected to the ... -
Comparative studies of the oil from silybum marianum cultivated in Egypt using glc
( Qatar University , 1994 , Article)Quantitative comparative study of the oil fraction constituents in the fruits of Silybum marianum successfully cultivated in new reclaimed land with those of the two wild types viz., purple flower and white flower bearing ... -
Comparative Study of 11 Honey Samples Sold in Riyadh Saudi Arabia
( Qatar University , 2006 , Article)11 honey various samples commercially available in Saudi Arabia, were subjected to chemical, toxicological and bacteriological tests. The samples were checked for As and CN, presence of pollens, and for bacteria contamination. ... -
Comparative study of organic and inorganic fertilizers on forage corn (Zea mays l.) Grown on two soil types
( Qatar University , 2001 , Article)Two pot experiments were conducted in 1995/96 and 1996/97 to investigate the interactive effects of organic and inorganic fertilizers applied to two soil types on the performance of corn (Zea mays L.). The soil types were ... -
A comparative study of the effects of clumping, substrate, light, depth of burial and soil moisture upon the germination of seeds of weeds and crops grown in the sudan gezira.
( Qatar University , 1985 , Article)The influence of the number of seeds per clump upon germination of oryza sativa L., Gossypium hirsutum L., Brachiaria eruciformis (Sm.) Griseb, Dinbera retroflexa (Vahl) Panz. and Echinochloa colonum (L.) Link was investigated ... -
A comparative study of the mechanical properties of low Density polyethylene (ldpe)
( Qatar University , 1997 , Article)Mechanical properties of engineering polymers which are the most important properties for design and construction purposes are diverse. This has been proved by investigation tensile properties of different grades of LDPE ... -
Comparison of antibiotic susceptibilities of four species of coagulase-negative staphylococci isolated rom normal skin and acne Lesions: a statistical approach
( Qatar University , 1996 , Article)Ten strains of each of four species of coagulase negative staphylococci: S. epidermidis, S. hominis, S. capitis, and S. cohnii isolated from both acne lesion and normal skin (total 80 strains) were tested for their antibiotic ... -
Comparison of body mass, feeding and food conversion of temperature acclimatized Porcellionides pruinosus (Brandt, 1833) (Isopoda, Oniscidea) fed on the dry leaf of Punica granatum
( Qatar University , 2006 , Article)A detailed study was conducted on the body mass; moisture; assimilation efficiency; gross and net production efficiencies; feeding, assimilation; conversion and metabolic rates of the woodlouse Porcellionides pruinosus ... -
Comparison of mechanical shaking, ultrasonication and Homogenization as techniques used in removing attached Bacteria and their effects on the associated protozoa
( Qatar University , 1994 , Article)During studying of Protozoa in the slow sand filter beds in Ashford Common Water Treatment Work (London, U.K.), it was found necessary to study the interstitial and attached bacterial populations involved with sand particles, ... -
Completeness Of Distributive P-Algebras
( Qatar University , 1988 , Article)According to the triple characterization of distributive p-algebras which is given by T. Katrinak, we characterize the completeness of distributive p-algebras.