تصفح Qatar University Science Journal - [From 1981 TO 2007] حسب العنوان
السجلات المعروضة 323 -- 342 من 770
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A histological study on the neuroendocrinal system of a coleopterous insect, cy3ister tripunctatus africanus cast.
( Qatar University , 1983 , Article)Four different types of neurosecretory cells were identified in the brain of the adult water beetle, Cybister tripunctatus africanus Cast. These cells were identified into A, B, C, & D types according to their morphological ... -
Histology And Development Of Argas (Argas) Hermanni (Ixodoidea: Argasidae) Salivary Glands
( Qatar University , 1993 , Article)The anatomy and histology of Argas (Argas) hermanni salivary glands were studied during nymphal and adult development. The paired salivary glands consist of 2 alveolar types. Type I alveoli consist of several cells forming ... -
Histomorphology Of The Skin Of The Gecko Cyrtodactylus Scaber (Gekkonidae, Reptilia)
( Qatar University , 1989 , Article)The histological structures from different dorsal and ventral regions of the skin of the gecko Cyrtodactylus scaber are described. Qualitative differences in the skin structures are recorded. The correlation between the ... -
Homomorphisms And Subalgebras Of Ms-Algebras
( Qatar University , 1995 , Article)According to the characterization of MS-algcbras from the subvaricty Kj by mean of the triple construction, we characterize the homomorphisms and the subalgebras of the MS-algcbras. Also, we solve the "Fill-in" problem for ... -
HPLC and MS analyses of lutein-esters from tagetes patula L.
( Qatar University , 1996 , Article)Investigation of the xanthophyll esters of Tagetes patula L. flowers resulted in the isolation and identification of lutein, lutein dimyristate, lutein myristate palmitate, lutein dipalmitate and lutein palmitate stearate. ... -
Human Resources Development and Institutional Arrangements for Managing Coastal Resources and Environments in the UAE, From Concept to Practice
( Qatar University , 1999 , Article)The coastal area of UAE contains some of the world's richest ecosystems including extensive oil reservoirs, coral reefs and mangrove forests. UAE in fact faces an acute shortage of personnel having the necessary knowledge, ... -
Hydrography Of The Western Part Of The Arabian Gulf
( Qatar University , 1986 , Article)The hydrographic conditions in the western part of the Gulf, from Kuwait to UAE, were studied. Water temperature, salinity, sigma T and water masses were determined for two cruises. The first cruise was carried out from ... -
Improvement Of The Piecewise Approximation Methods
( Qatar University , 1996 , Article)A piecewise approximation method is described for planar curves. The order of classical piecewise approximations is improved. The method exploits the freedom in the choice of the parametrization and rises the approximation ... -
Improvement The Quality of 'Soya Bean Seed Storage Proteins by Genetic Engineering Cdna Encoding G2 Subunit
( Qatar University , 2003 , Article)The goal of this work is to improve nutritional quality of soybean seed proteins by altering cDNA-encoding G2 subunit of Soybean glycinin to be capable of self-assembly in vitro. Two plasmids were constructed; one designated ... -
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 ... -
The In Vitro Genotoxic Activity Of Albendazole And Praziquantel, Singly And In Combination On Human Blood Lymphocytes
( Qatar University , 1996 , Article)Two anthelmintic drugs; Albendazole (ABZ) and Praziquantel (PZQ), applied individually or in combination, were tested at varying concentrations (5,10,20,40 and 100 ug/ml) for their ability to induce sister-chromatid exchanges ... -
Incidence and characterization of bacillus cereus isolated From egyptian foods.
( Qatar University , 1993 , Article)In this study, 178 strains of Bacillus cereus were isolated from different Egyptian foods. Isolation was performed, using MYP and PEMBA media and confirmed by staining and biochemical tests. B. cereus occurred in 98% of ... -
Incidence of Nosocomial infection of Pseudomonas aeruginosa in General Basrah Hospital in Basrah City / IRAQ
( Qatar University , 1999 , Article)One thousand and two hunderd twenty six specimens were obtained from patients and 516 swabs from different surfaces of environments Basrah General Hospital were collected. Sixty five patients were suffering from Pseudomonas ... -
Inclusion Relation between Two Absolute Summability Methods
( Qatar University , 1999 , Article)In the present paper, the problem of inclusion of the absolute method of summability \N,q with that of \N,r has been considered. Nesessary and suffiecient condition for which \N,q I C_ N,r I is established, and non-trivial ... -
Indecomposable Representations Of Order Of E6
( Qatar University , 1985 , Article)The extended Dynkin diagram is a valued graph. We are going to construct a Baechstrom order A associateed to Eg. We prove, by constructions, that the order A of infinite lattice-type but can be listed (tame-type), i.e., ... -
The influence of certain physical stresses on pulal mortality of Culex pipiens complex L. II. Effect of exposure to oxygen and partial vacuum.
( Qatar University , 1993 , Article)The results indicated that when pupae were exposed to oxygen atmosphere for different periods ranging from V2 - 48 hours, the pupal mortality increased with increasing the exposure periods. The mortality reached to about ... -
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 ...