تصفح Research Units حسب العنوان
السجلات المعروضة 4014 -- 4033 من 4920
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Study of microbial communities and environmental parameters of seawater collected from three Tunisian fishing harbors in Kerkennah Islands: Statistical analysis of the temporal and spatial dynamics
( Elsevier Ltd , 2022 , Article)Surface seawater, collected from three fishing harbors during different seasons of the years 2015, 2016 and 2017, were assessed for physico-chemical analyses. Results showed that seawater was mainly polluted by hydrocarbons ... -
Study of microstructural and mechanical properties of al/sic/tio2 hybrid nanocomposites developed by microwave sintering
( MDPI , 2021 , Article)Aluminum hybrid metal matrix nanocomposites (Al/SiC/TiO2) were synthesized through a microwave-assisted powder metallurgy process, and their evolved microstructure and mechanical properties were investigated. The Al/SiC/TiO2 ... -
Study of mild steel sandwich structure energy absorption performance subjected to localized impulsive loading
( MDPI AG , 2020 , Article)Extensive research focus had been given to sacrificial sandwich panels to mitigate the effects of blast loads. This is due to their ability to distribute the load and absorb a significant portion of the blast energy. This ... -
Study of performance, combustion, and emissions parameters of DI-diesel engine fueled with algae biodiesel/diesel/n-pentane blends
( Elsevier Ltd , 2021 , Article)Biodiesel extracted from Scenedesmus obliquus algae through transesterification was used in the current study. Due to the disadvantages of using pure biodiesel in engines, it was used as B50 (a blend of 50% diesel and 50% ... -
Study of polyaniline-silver nanocomposite as humidity sensor
( Hamad bin Khalifa University Press (HBKU Press) , 2018 , Conference Paper)Study of polyaniline-silver nanocomposite as humidity sensor J. Bhadra, A. Popelka, N. J. Al-Thani, A. Abdulkareem Center for Advanced Materials, Qatar University, Qatar Abstract In this piece of work focus on fabrication ... -
Study of π-conjugation effect of organic semiconductors on their optical parameters
( Elsevier B.V. , 2016 , Article)Metal free organic semiconductor “7,16-bis(3,3-dimethyl-3H-indol-2-yl)-5,14-dihydrodibenzo [b,i][1,4,8,11] tetraazacyclotetradecine” and metal free with extended π-conjugation organic semiconductor “8,19-bis(3,3-dimethyl ... -
Study on structure, thermal behavior and viscoelastic properties of nanodiamond-reinforced poly (Vinyl alcohol) nanocomposites
( MDPI AG , 2021 , Article)In this work, advanced polymer nanocomposites comprising of polyvinyl alcohol (PVA) and nanodiamonds (NDs) were developed using a single-step solution-casting method. The proper ties of the prepared PVA/NDs nanocomposites ... -
Study on the corrosion behavior of polymeric nanocomposite coatings containing halloysite nanotubes loaded with multicomponent inhibitor
( Elsevier B.V. , 2022 , Article)In the present study, the halloysite nanotubes (HNTs) were loaded with a multicomponent inhibitor (LHNT) comprising mainly benzotriazole (BTA), sodium benzoate (SB), and lauric acid (LA) via the vacuum cycling method. The ... -
A study on the determinants of Ethiopian minibus taxi drivers' speeding behaviour: An application of the 'major theorists' model
( Elsevier B.V. , 2022 , Article)Speeding is the most common road safety problem that results in many traffic accidents in Addis Ababa, Ethiopia. Minibus taxis substantially contribute to speed-related road traffic crashes in Addis Ababa. This study aimed ... -
Study the efficiency of Ultrasonic Technology in Removal of Algae from Surface Waters
( Qatar University Young Scientists Center - Qatar University , 2024 , Conference Paper)The diversity of human activities and the expansion of agricultural work led to an increase in nutrient accumulation, which reached aquatic ecosystems, causing algal blooms. This highlighted the importance of the treatment ... -
Study the Potential Use of Waste Water Grown Microalgae Biomass as Biofertilizer
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Liquid wastewater streams that contain nitrogen must be treated before being discharged into the environment to prevent eutrophication. Already there are several existing conventional treatment technologies that can remove ... -
A study to investigate the energy recovery potential from different macromolecules of a low-lipid marine Tetraselmis sp. biomass through HTL process
( Elsevier , 2022 , Article)This study investigated the hydrothermal liquefaction (HTL) of extracted major macromolecules from Tetraselmis sp. biomass. The carbohydrate fraction was first recovered from Tetraselmis biomass using pressurized heated ... -
Studying critical pedestrian behavioral changes for the safety assessment at signalized crosswalks
( Elsevier B.V. , 2017 , Article)Pedestrian-vehicle conflicts are one of the most important safety concerns at signalized intersections especially in urban areas. Conflicting vehicles and pedestrians select their maneuvers by predicting the other user ... -
Studying the effect of solvent properties in treatment design within CO2 Integration Networks
( Elsevier B.V. , 2021 , Book chapter)Carbon Dioxide Integration mainly targets the recovery of CO2 streams, and assesses the allocation of those recovered streams into CO2-using sinks, with an overall aim of attaining a minimum cost of a CO2 network that could ... -
Studying the effect of using zinc chloride on dyeing cotton fabrics with licorice extract
( Qatar University Young Scientists Center - Qatar University , 2024 , Conference Paper)Natural dyes have been known to be used to color foodstuffs, and leather in addition to natural fibers such as wool, silk, and cotton as significant fields of application since prehistoric times. Natural dyes produce an ... -
Submerged module of outer selective hollow fiber membrane for effective fouling mitigation in osmotic membrane bioreactor for desalination
( Elsevier , 2020 , Article)This paper investigated the membrane fouling mitigation efficacy and performance of a home-made submerged module containing outer selective hollow fiber thin film composite forward osmosis (OSHF TFC FO) membrane in osmosis ... -
Submerged versus side-stream osmotic membrane bioreactors using an outer-selective hollow fiber osmotic membrane for desalination
( Elsevier , 2021 , Article)This study investigated the comparative performances, fouling mitigation efficiencies, and operational costs of side-stream and submerged osmotic membrane bioreactors (OMBR) systems using an outer-selective hollow fiber ... -
Subsidy Reduction and Trends among Lower Income Qatari Households
( The Social and Economic Survey Research Institute, Qatar University , 2016 , Report)The reduction of economic subsidies (e.g., on vehicle fuel and electricity) can bring important financial and environmental benefits to Qatar, but such changes also have the potential to impact negatively the poorest Qatari ... -
Substantial cell apoptosis provoked by naked PAMAM dendrimers in HER2-positive human breast cancer via JNK and ERK1/ERK2 signalling pathways
( Elsevier , 2021 , Article)HER2-positive breast cancer is one of its most challenging subtypes, forming around 15–25% of the total cases. It is characterized by aggressive behavior and treatment resistance. On the other hand, poly (amidoamine) (PAMAM) ... -
Substantial toxic effect of water-pipe smoking on the early stage of embryonic development
( Oxford University Press , 2017 , Article)Water-pipe smoking (WPS) is the most widespread tobacco use in the Middle-East, and is rapidly spreading globally. Smoke from WP contains most of the compounds present in cigarette smoke, although in different proportions. ...