تصفح University Publications حسب العنوان
السجلات المعروضة 1237 -- 1256 من 4355
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Microplastics in the beach sediments around the Ras Rakan Island, Qatar
( Qatar University Press , 2021 , Poster)The ubiquitous microplastic (MP) pollution is an emerging environmental issue in the marine environment. In this study, historical accumulation trends of MPs in the beach sediments around the Ras Rakan Island of Qatar have ... -
Microscopic Study Of The Rabbit Pancreas After Vagotomy
( Qatar University , 1997 , Article)The microscopic study of the morphological changes in the rabbit pancreas were investigated after vagotomy. Structural changes were observed in the pancreatic acinar cells and in the islets of langerhans two and three weeks ... -
Microwave Spectra of 13CH3C15N and 13CH3 13C 15N Molecules In the Frequency Range 17-95 GHz
( Qatar University , 2002 , Article)Some microwave frequencies of the v^ + Vg vibrational combination band for the two isotopes CH^C N and CH^ C N of methyl cyanide were measured in the frequency range 17-95 GHz, for the transitions AJ = 1<-0, AJ = 2<-1, AJ ... -
Middle-Upper Devonian And Lower Carboniferous Miospore Assemblages From Western Desert Of Egypt
( Qatar University , 1985 , Article)Important morphological features of some spore assemblages from Middle-Upper Devonian and Lower Carboniferous of Western Desert of Egypt are described. Comparing the present assemblages with those obtained from other ... -
Military Fuel Cell-Based Vehicles: Modular Power DC-DC Converter System
( Qatar University Press , 2021 , Poster)Electric Vehicles (EVs) have attracted researchers' attention to further develop and enhance this strategic area. Compared to fuel-based vehicles, EVs are more in demand nowadays due to their high performance and modern ... -
Mineral analysis of soil, euphorbia hirta l. And mycoflora from the industrial Yanbu City, Saudi Arabia
( Qatar University , 1995 , Article)Soil and Euphorbia hirta L. samples were collected from five localities from the industrial Yanbu city Saudi Arabia, and analysed for their metal and fungal flora. Soil type is sandy, alkaline and contained low percentage ... -
Mineral Content Of Soil And Wild Plants From Saudi Arabia
( Qatar University , 1996 , Article)Soil and wild plant samples were collected from different localities from the industrial Yanbu city, Saudi Arabia, and analyzed for their mineral content. Soil samples from the tested localities differed greatly and contained ... -
Mineralogical and Chemical Properties of El-Fa Youm Clays
( Qatar University , 1993 , Article)El-Batts Demo Area constitutes a part of El-Fayoum province in Egypt, it is dominated by clay formations 17 meters thickness, covered in part by a thin layer of Pleistocene deposits. XRD studies reveal that smectite is ... -
Mineralogical and Geochemical Compositions of Modern Bivalve Shells from The Mediterranean Coast Of Egypt
( Qatar University , 1993 , Article)The stable isotopic (8 ^C and 8^O) and elemental (Sr and Mg) compositions are presented for marine mollusc Carditacea and Solenacea shells collected off the Mediterranean coast of Egypt. Based on shell microstructures and ... -
Mineralogical And Geochemical Evaluation Of Upper Cretaceous Black Shales, Safaga District, Egypt.
( Qatar University , 1995 , Article)Lithologic and compositional properties of black shale and pyrite from the Upper Cretaceous phosphorite/black shale deposits (Duwi Formation) of Eastern Desert of Egypt indicate similarity in mineralogy, geochemical ... -
The mineralogy and chemistry of cement and cement raw materials In the united arab emirates
( Qatar University , 1996 , Article)The raw materials, clinkers and cements from different cement factories in the United Arab Emirates have been investigated using polarizing microscopy, X-ray diffraction (XRD), Scanning electron microscopy (SEM), and ... -
Mineralogy and Chemistry of Desert Roses, Ayn Dar Area, Abqaiq, Eastern Province, Saudi Arabia
( Qatar University , 2002 , Article)Desert roses are crystals which usually take the form of rose petal. They have definite crystal shapes, and enclose sand grains. The desert roses were scattered along an area of about 500m2 in the Ayn Dar area, near Abqaiq, ... -
The Mineralogy and Chemistry of Urinary Stones from the United Arab Emirates
( Qatar University , 1999 , Article)The purpose of this study is to characterize urinary stones from the United Arab Emirates using mineralogical techniques and compare it with stones in nature. Twenty six urinary calculi were subjected to chemical analysis, ... -
Mineralogy and Genesis of Heavy Minerals in Coastal Dune Sands, South Eastern Qatar
( Qatar University , 1999 , Article)Large amounts of aeolian sand occur in the southeastern coastal zone of Qatar Peninsula as sand dunes accumulated in a vast sand field locally called " Niqyan Qatar ". The present work, carried out on a sand dune belt of ... -
Mineralogy Of The Marrat Clay Deposits, Riyadh Region, Central Saudi Arabia
( Qatar University , 1989 , Article)Clays in the Marrat Formation, which crop out 200 km west of Riyadh, Saudi Arabia, are dominantly composed of brownish red to dark red mudstones and shales. Marrat clays are chiefly composed of kaolinite and lesser amounts ... -
Mineralogy, petrography and manufacturing of good quality Blackboard chalk
( Qatar University , 1996 , Article)Most of the Arabian countries produce bad quality and dusty blackboard chalk. Good quality and dustless blackboard chalk are usually imported from Europe, China, Taiwan and the United States of America. The essential raw ... -
Mitigating Legal Risks in Construction Project Contracts: The Importance and the Applicability of Force Majeure Clauses
( Qatar University Press , 2023 , Conference Paper)Contracts in the construction industry are structured in a manner that splits the risks between different contracting parties; hence risk allocations within the contract affect the price and operation. As most Construction ... -
Mitotic Disturbances Induced By The Drug "Novalgin" In Allium Cepa Root Tips
( Qatar University , 1984 , Article)Growing root tips of Allium cepa are treated with seven concentrations of Novalgin ranging from 2.81 x 10 4 M to 1.5 x 10 4 M for 4, 8, 24,48 and 72 hours. The frequency of mitotic phases in the treated roots varies ... -
A Mixed Markovian Time Series Model
( Qatar University , 1997 , Article)We study a simple time series model the noise properties of the proposed model are derived. An algorithm based on the conditional mean and the conditional variance, for estimating the parameters of the proposed model is ... -
Mixed Model For Analyzing Variability in Mortality Rates Over Time With Reference To Qatar Mortality Data
( Qatar University , 1993 , Article)It was observed that variability in mortality rates over time in the state of Qatar is not of binomial nature. A method of analyzing these mortality rates in the heterogeneous population is presented in this paper. Three ...
