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السجلات المعروضة 23285 -- 23304 من 49081
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Studies on metal–organic framework (MOF) nanomedicine preparations of sildenafil for the future treatment of pulmonary arterial hypertension
( nature , 2021 , Article)Pulmonary arterial hypertension (PAH) is an incurable disease, although symptoms are treated with a range of dilator drugs. Despite their clinical benefits, these drugs are limited by systemic side-effects. It is, therefore, ... -
Studies On Plant Growth Regulators And Enzymes Production By Some Bacteria
( Qatar University , 1994 , Article)Twenty four bacterial strains of thallobacteria belonging to genus Streptomyces were tested for their potentialities to produce plant growth regulators and some hydrolases in shake cultures. Seven strains namely; Streptomyces ... -
Studies On Possible Factors In Saliva In The Etiology Of Oral Cancer
( Qatar University , 1994 , Article)The present study was performed on 195 individuals divided according to their oral hygiene into the following four groups; Group I: Control healthy individuals; Group II: Patients suffering of early to moderate periodontitis; ... -
Studies on Soil Cements : 2 — Physicochemical Properties of the Hardened Soil Cement Pastes.
( Qatar University , 1982 , Article)Various hardened soil-cement pastes were prepared from dry mixtures of montmorillonite clay and portland cement clinker by using different W/C ratios of 0.20, 40, 0.60 and 0.80 and cured in air for various ages. Compressive ... -
Studies on Soil Cements: 1 - Role of Hydrated Lime and Dolomitic Monohydrate in Montmorillonite Stabilization
( Qatar University , 1982 , Article)Montmorillonite clay was stabilized by either hydrated lime or the dolomitic monohydrate (Ca(OH)2. MgO) during suspension hydration at 25 and 60°C for 45 days. The distinct phases produced from the hydration of each ... -
Studies on some aspects of antiviral activity. 1-influence of propolis on Newcastle disease virus
( Qatar University , 1994 , Article)The effect of popolis on different-Newcastle disease virus (NDV) vaccinal strains as well as virulent virus were studied. It was clear that the addition of propolis to NDV induced a significant reduction of infectivity ... -
Studies on some cowpea cultivars: II - suitability for aspergillus flavus growth and Aflatoxin production
( Qatar University , 1993 , Article)Sixteen mycotoxin-free seed cultivar samples of cowpea (Vigna unguiculata (L.) Walp.) were inoculated with spores* of Aspergillus flavus Link (IMI 89717) to determine varietal differences in terms of aflatoxin production. ... -
Studies On Some Fetal Rat Organs Following Maternal Hyperthermia
( Qatar University , 1993 , Article)The present investigation was carried out to determine the histological changes in brain, liver and kidneys of rat fetuses maternally heatstressed at early stage of pregnancy to either high "spiking" temperature of short ... -
Studies on the biology of eucalyptus micro theca f. Muell in the gezira, sudan i. The behaviour of the seed
( Qatar University , 1986 , Article)Eucalyptus microtheca has proved to be a success on the heavy clay soils of the Gezira. This tree species not only seeds regularly and prolifically during the summer, but also, though rarely, seeds during the winter. The ... -
Studies On The Decay Of 241Am
( Qatar University , 1989 , Article)The gamma-spectrum of '"Np following the <X -decay of "'Am has been studied using hyper pure Ge-detector and Ge-NaI(Tl) coincidence spectrometer. Some recently reported weak gamma transitions are confirmed, besides two ... -
Studies On The Effect Of Cadmium Chloride On The Gonads Of The Developing Chick Embryos
( Qatar University , 1987 , Article)Cadmium chloride was injected in doses of 5, 10, 15 and 20 /xg/egg into the yolk sac of 4—day—old chick embryos. Mortality due to cadmium intaxication increased with dose increase. The mortality rate of chick embryos ... -
Studies on the Electrical Properties of Graphene Oxide-Reinforced Poly (4-Styrene Sulfonic Acid) and Polyvinyl Alcohol Blend Composites
( World Scientific Publishing Co. Pte Ltd , 2018 , Article)In the present study, graphene oxide (GO)-reinforced poly (4-styrenesulfonic acid) (PSSA)/polyvinyl alcohol (PVA) blend composite films were prepared using colloidal blending technique at various concentrations of GO ... -
Studies on the Mechanical, Morphological and Electrical Properties of Highly Dispersible Graphene Oxide Reinforced Polypyrrole and Polyvinylalcohol Blend Composites
( Elsevier Ltd , 2018 , Conference Paper)In the present study, water soluble polypyrrole (WPPy)/polyvinyl alcohol (PVA)/graphene oxide (GO) composite films were prepared via colloidal blending method at different GO loadings varying from 0 – 3 wt%. The dispersion ... -
Studies On The Trematodes Of The Genus Enenterum Linton, 1910 (Opecoelidae) And The Oenus Pseudocreadium Layman, 1930 (Lepocreadiidae) From Some Red Sea Fish
( Qatar University , 1985 , Article)The genera Enenterum and Pseudocreadium are reviewed. It is suggested that Pseudocreadium indicum Madhavi, 1972 should be considered a synonym of P. balistes Nagaty, 1942. Enenterum pimelopteri Nagaty, 1942, is redescribed ... -
Study of a ternary blend system for bulk heterojunction thin film solar cells
( Institute of Physics Publishing , 2016 , Article)In this research, we report a bulk heterojunction (BHJ) solar cell consisting of a ternary blend system. Poly(3-hexylthiophene) P3HT is used as a donor and [6,6]-phenyl C61-butyric acid methylester (PCBM) plays the role ... -
Study of A Time Dependent Double -Diffusive Salinity Problem
( Qatar University , 1989 , Article)The time-dependent, double diffusive stability problem for a horizontal layer of salty water bounded by two rigid isothermal surfaces is analyzed using a linear perturbation technique. Initially, the layer is subjected to ... -
Study Of Aerobiology Of Alexandria, Egypt
( Qatar University , 1991 , Article)The present study provides a survey of atmospheric pollen and fungal spores in the city of Alexandria with the aim of supplying information that may be useful in the treatment of aeroallergies. Considerable attention has ... -
A Study of Anxiety Symptoms in Children and Adolescents during the COVID-19 Pandemic in Qatar
( Multidisciplinary Digital Publishing Institute (MDPI) , 2023 , Article)Background: There is clear evidence showing an increase in mental health symptoms along with an increased demand for mental health services since the start of the COVID-19 pandemic. Objective: This study aimed to determine ... -
A Study Of Atmospheric Transparency Over Qena In Upper Egypt
( Qatar University , 1995 , Article)Atmospheric transparency over Qena/Egypt has been studied for direct solar radiation values . which were calculated from global and diffuse solar radiation measurements . The mean monthly of the instantaneously transparency ... -
Study of bacterial interactions in reconstituted hydrocarbon-degrading bacterial consortia from a local collection, for the bioremediation of weathered oily-soils
( Elsevier B.V. , 2021 , Article)To enhance the process of bacterial remediation of weathered hydrocarbons, the area of Dukhan, Qatar, was considered as a model for weathering processes. Self-purification by indigenous hydrocarbon-degrading bacteria showed ...
