Browsing Qatar University Science Journal - [From 1981 TO 2007] by Title
Now showing items 517-536 of 770
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Petrogenesis And Tectonic Setting Of The Vqlcanic Suite West Of Wadi Bagharid South Eastern Desert, Egypt
( Qatar University , 1987 , Article)The metavolcanic belt west of Wadi Bagharid, south Eastern Desert, Egypt is geologically investigated. Petrographically, the metavolcanics are subdivided into four rock varieties namely: metaandesites, metadacite-rhyodacite, ... -
Petrographic And Chemical Microheterogeneity In Dolomite, Bahariya Oasis, Egypt
( Qatar University , 1994 , Article)Dolomite samples from the lower member of the El-Hafhuf Formation (Turonian-Santonian) possess noticeable petrographic and chemical heterogeneity among their fabric components. Petrographically, the study samples can be ... -
Petrographic Studies of the Alamein Dolomite (Lower Cretaceous) in El-Razzak Oil Field, Western Desert, Egypt
( Qatar University , 1982 , Article)The origin and environment of deposition of the Alamein Dolomite in the El-Razzak Oil Field have been investigated by means of petrographic, chemical and X-ray analysis. The studied rocks are composed of dolomite with ... -
Petrology, Mineralogy and Genesis ofWadi Dana Cambrian Manganese Deposit, Central Wadi Araba Region, Jordan
( Qatar University , 2001 , Article)Manganese oxides occurring at Wadi Dana (central Wadi Araba region, Jordan) are mainly hosted in the middle Cambrian dolomite limestone shale unit (DLSU). This deposit was investigated to elucidate their petrographic ... -
Petrophysical Studies For Some Lower Cretaceous Formations, Western Desert, Egypt
( Qatar University , 1988 , Article)The Kharita, the Dahab and the Alamein Formations are representing the upper part of the Lower Cretaceous rock sequence in the northern part of the Egyptain Western Desert. Some core samples have been obtained from these ... -
Petrophysical Studies on Samples from Eocene Exposures West Cairo-Egypt
( Qatar University , 1981 , Article)The present work deals with petrophysical and petrochemical studies on 58 limestone samples of Eocene age in two localities west of Cairo (Sakkara and Giza Pyramids Plateau). The determined petrophysical properties are: ... -
Phosphate Solubilization in Vitro By Some Soil Yeasts
( Qatar University , 2005 , Article)Soil yeasts including, Candida tropicalis, Geotrichum capitatum, Geotrichum candidum, Rhodotorula minuta and Rhodotorula rubra were isolated from soils of Saudi Arabia. The ability of these soil yeasts to solubilize insoluble ... -
Phospholipid Fatty Acids Compositions of Sponges from Qatar I- Haplosclerida
( Qatar University , 2006 , Article)The phospholipid fatty acid contents of six Haplosclerida sponges collected along Qatari ;ts, Arabian Gulf, were identified by coupling GC-MS experiments. More than hundred of rated and unsaturated fatty acids have been ... -
Photocatalytic treatment of industrial wastewater
( Qatar University , 1997 , Article)A novel Plexiglas double-skin sheet reactor ( DSSR ) able to use diffuse as well as direct sunlight for the detoxification of industrial wastewater was used. The efficiency of the photocatalytic treatment of a highly ... -
Photoperiod and salinity effects on survival and some blood parameters in female Bufo regularis
( Qatar University , 1986 , Article)This study, investigates the effect of different salinities injected (30, 70 and 100 % sea water) and photoperiods (L:D/8:16,L:D/12:12 and L: D / 16 : 8 ) on female Bufo regularis (1) survival rate, (2 ) oxygen and carbon ... -
Phyllosphere and phylloplane fungi of some herbal plants belonging to Labiatae, Solanaceae and Umbelliferae in Egypt
( Qatar University , 1997 , Article)Survey on the occurrence of phyllosphere and phylloplane fungi on leaves surface of 15 different kinds of fresh herbs (three samples of each kind) belonging to three plant families (five kinds belonging to each of Labiatae, ... -
Phylogenetic studies on the architectural features of Amphibian (bufo regularis) and mammalian (oryctolagus cuniculus) kidneys
( Qatar University , 1994 , Article)The results of the present study revealed that mesonephric and metanephric kidneys of both the anamniotes (Bufo regularis) and the amniotes (Oryctolagus cuniculus) vertebrates respectively differ morphologically, anatomically ... -
Physiological growth analysis of the life-history of calotropis procera (AIT.) AIT. F.
( Qatar University , 1992 , Article)Growth of Calotropis procera was analysed by distribution of dry weight throughout the plant at various stages in growth. Dry biomass, leaf area index, specific leaf area, leaf weight ratio, leaf area ratio, net assimilation ... -
Phyto-Ecological Observations In Northern Oman
( Qatar University , 1985 , Article)The present study has evolved out of a limited field work during a short visit to Oman. It is an attempt to record more detailed data on the plant communities and their habitat features in three sectors of northern Oman. ... -
Phytochemical investigation of thymus decassatus l. 1. Flavonoids and volatile oil
( Qatar University , 1993 , Article)Investigation of the flavonoidal constituents of Thymus decassatus, L. resulted in the isolation and identification of thymonin, 5,6,4'-trihydroxy-7,3'-dimethoxyl flavone, and apigenin. Investigation of the volatile oil ... -
Phytochemical Studies On The Marine Algae Of Qatar, Arabian Gulf
( Qatar University , 1990 , Article)The most dominant twenty three algal species representing the main three groups of benthic macroalgae, Chlorophyceae, Phaeophyceae and Rhodophyceae were collected from the coastal zones of the Qatar peninsula. These algae ... -
Phytoplankton In An Area Of Multi-Polluting Factors West Of Alexandria, Egypt
( Qatar University , 1987 , Article)A year cycle of phytoplankton community in polluted inshore area of the Egyptian Mediterranean water, west of Alexandria, was followed. Seasonal and regional variations of the physico-chemical characteristics were studied ... -
Plant diversity, dispersion, community similarity and vegetation description in united arab emirates. I. North western area
( Qatar University , 1995 , Article)Papers presented at The gulf symposium on Environmental biology, University of Qatar, 7-9 May 1994 *********** Plant population patterns in six natural communities (A-F) in the northern part of the UAE were studied. The ... -
Plant diversity, dispersion, community similarity, and vegetation description in united arab emirates. II eastern coast
( Qatar University , 1995 , Article)Papers presented at The gulf symposium on Environmental biology, University of Qatar, 7-9 May 1994 *********** The vegetation on the eastern coast of UAE was studied in 3 undisturbed sites. Dispersion, species-area, and ... -
Plant growth, metabolism and adaptation in relation to stress conditions v. Effects of salinity on the fatty acids of germinating flax, cotton and castor bean seeds
( Qatar University , 1987 , Article)The same three fatty acids were detected in flax, cotton and castor bean seeds: myristic, plamitic and oleic. In addition, linoleic was found in flax and lauric and stearic in castor bean. The seeds were germinated over ...