Qatar University Science Journal - [From 1981 TO 2007]: Recent submissions
Now showing items 541-560 of 770
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Geology of wadi atalla - el missikat area, eastern desert, egypt.
( Qatar University , 1989 , Article)Wadi Atalla-El Missikat area covers about 2,000 Km2 in the central Eastern Desert of Egypt, between latitudes 26° 10' and 26° 40' N, and longitudes 33° 15' and 33° 40' E. The area is mainly formed of basement complex except ... -
Fluometuron Induced Growth, Chemical And Photosynthetic Changes In Chlorella Vulgaris
( Qatar University , 1988 , Article)Presence of fluometuron at different concentrations in the culture medium of Chlorella vulgaris induced pronounced inhibition in the growth rate and dry weight of the alga throughout the experimental period. Furthermore, ... -
The effect of two substituents on different Organoselenides and tellurides to form new charge - transfer complexes
( Qatar University , 1999 , Article)Different organotellurides and selenides were prepared as electron donors and reacted with p-Benzoquinone (p-BQ) and m-Dinitrobenzene (m-DNB) as electron acceptors. The resulted molecules were considered as new charge ... -
Enzymatic Upgrading of Fish and Crustacean Products
( Qatar University , 1999 , Article)Fish wastes constitute an important source of biologically active molecules possessing peculiar properties and practical application promises in various areas ( agriculture, medicine, chemistry, biotechnology ). Several ... -
Origin And Tectonic Environment Of The Pan-African Rocks Of Abu El Tiyur Area, Eastern Desert, Egypt
( Qatar University , 1995 , Article)The present paper deals with the geochemistry and origin of the Pan - African basement rocks, which covers about 825 km2 North of Abu El Tiyur area, in the Central Eastern Desert of Egypt. The petrochemical character of ... -
Biochemical composition of the copepod euterpina acutifrons from the Coastal waters of alexandria
( Qatar University , 1994 , Article)Protein, carbohydrate and lipid contents were determined in the most numerous and wide spread copepod Euterpina acutifrons collected from the coastal waters of Alexandria. Protein is the major biochemical component of the ... -
The effect of doping crystals of tgs with some di- and trivalent ions on its: (i) dielectric constant and a.c. Conductivity
( Qatar University , 1987 , Article)The problem of the existence of a new ferroelectric phase transition at low temperatures in TGS crystals is discussed. The influence of some inorganic divalent and trivalent ions presented in the lattice of TGS on dielectric ... -
Ciliates and Other Microorganisms in the Plankton from Al-Sammaliah Island- Arabian Gulf-United Arab Emirates
( Qatar University , 1999 , Article)Al-Sammaliah Island is one of more than 200 islands belonging to United Arab Emirates in the Arabian Gulf. This inshore shallow island lies at the north east coast of Abu Dhabi and is connected to the Arabian Gulf through ... -
Geochemistry of biotite and its significance as a guide to the origin of the granitoid rocks of el-imra area, eastern desert, egypt.
( Qatar University , 1988 , Article)Biotites from the granitoid rocks of El-Imra, Eastern Desert, Egypt have been examined. The chemical data of 8 new analyzed biotites are presented. The behaviour of major and trace elements in the examined biotites are ... -
Some Oceanographic Measurements In The Gulf Waters Around Qatar Peninsula
( Qatar University , 1983 , Article)During the winter of 1979/1980 four cruises were made to the study area. Salinity, temperature and current speed and direction were measured. The areal distribution, as well as the vertical distribution of these parameters ... -
Gc-ms analysis and antimicrobial activity of volatile oil of Pituranthos tortuosus (desf.)
( Qatar University , 1995 , Article)Volatile oil of Pituranthos tortuosus (Desf.), family Umbelliferae was prepared in yield of (0.5%). GC-MS analysis of the oil resulted in identification of eight components. Dill apiole was the main constituent (94.76%). ... -
Partial Connection : A New Approach To Improving The Bandwidth Of Banyan Networks
( Qatar University , 1995 , Article)Banyan networks have been proposed as interconnection networks for large multiprocessors, those containing hundreds or even thousands of processors. Their attractiveness is attributed to two features : low manufacturing ... -
On Some Tintinnids (Protozoa : Ciliata)From The Strait Of Hormoz And The United Arab Emirates Waters
( Qatar University , 1995 , Article)An examination of plankton samples collected from the oceanic waters of the Strait of Hormoz and the UAE inshore and offshore waters revealed the presence of a diverse community of planktonic Tintinnida (Protozoa). 38 ... -
Parathormone, Calcium And Phosphorus In Autotransplanted Parathyroid, Total Thyriodectomized Patients
( Qatar University , 1995 , Article)The success of parathyroid autotransplantation was indicated by the postoperative assay of serum parathormone in thirteen out of fourteen patients to whom total thyroidectomy was carried out because of thyroid cancer during ... -
Formation Parameters Of The Lower Eocene Rocks In Qatar
( Qatar University , 1986 , Article)The study of some carbonate rock samples collected from four different locations in Qatar and attributed to the Rus Formation (Lower Eocene) reveals that these rocks are mainly heterogeneous in their petrophysical ... -
A Note On Pre-J-Group Rings
( Qatar University , 1991 , Article)Given an associative ring R satisfying a°'b = Ba" for any pair a and b of its elements, is being a positive integer, and a group G satisfying x""' = y"~1, we give a sufficient and necessary condition on the group ring GR ... -
S.G. Connected Spaces
( Qatar University , 2000 , Article)The purpose of this paper is to introduce and study a strongr type of connectedness called s.g connectedness in topologi-cal spaces. -
Pollen Morphology Of The Family Boraginaceae In Qatar
( Qatar University , 1995 , Article)The pollen morphology of six species belonging to six genera of Boraginaceae in Qatar have been investigated by LM and SEM. The examined species proved to be eurypalynous, having different morphological types and can be ... -
Geochemistry of the st. Catherine basement rocks, Sinai, Egypt
( Qatar University , 1994 , Article)St. Catherine area, dominated by basement rocks encompass old continental gneisses, metasediments, greenstone belt, calc-alkaline granites (G-II-granites), rift-related volcanies (RV), and anorogenic within plate granites ... -
Pollen Morphology of some Cultivated Varieties of Strawberry
( Qatar University , 1999 , Article)Pollen grains of twelve cultivated varieties of strawberries grown in Egypt were morphologically studied using both light microscopy and SEM observations. These varieties include eleven cultivars of Fragaria x ananassa ...
