Qatar University Institutional Repository: Recent submissions
Now showing items 921-940 of 28761
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Genomic characterization of plasmid-borne colistin resistance variants, mcr-1.1 and mcr-1.26, in multidrug-resistant Escherichia coli isolated from backyard farm animals
( Elsevier , 2024 , Other)Colistin remains a high-priority, critically important antimicrobial that is used for treating severe infections caused by multidrug-resistant (MDR) Gram-negative bacteria. However, colistin resistance and the emergence ... -
Efficient solar energy harvesting via thermally stable tungsten-based nanostructured solar thermophotovoltaic systems
( Elsevier , 2024 , Article)Electromagnetic radiations are a key energy source, which, by deploying bandgap-engineered devices, are directed onto PV cells to maximize their utilization. In this regard, the Solar Thermophotovoltaic (STPV) systems are ... -
Halophytes and associated properties of natural soils in the Doha area, Qatar
( Michigan State University Press , 2007 , Conference Paper)Plant life and the life they support are being eliminated and cannot cope with the construction activities in Doha City. One of the most important reasons behind this study is the fast rate at which many habitats are ... -
Endophytes and Halophytes to Remediate Industrial Wastewater and Saline Soils: Perspectives from Qatar
( MDPI , 2022 , Article Review)Many halophytes are considered to be salt hyperaccumulators, adopting ion extrusion and inclusion mechanisms. Such plants, with high aboveground biomass, may play crucial roles in saline habitats, including soil desalination ... -
Hypolithic cyanobacteria colonization of quartz at South Desert
( Science Publications , 2014 , Article)Hypolithic microbial communities (found underneath rocks) were encountered in the southern desert of Qatar where quartz rocks are ubiquitous and are a substrate for hypoliths. These hypoliths thrive where extreme temperature, ... -
A complete sequence of the 16S rRNA gene of a novel Streptomyces coelicolor (AB588124) (QU66c-2002) isolated from the soil of Qatar
( Asian Network for Scientific Information , 2011 , Article)The aim of this study was to determine the sequence of the 16S rRNA gene and thus to conduct the phylogenic position of the naturally occurring wild type strain of Streptomyces QU66C. Here we show conclusively the full ... -
Prevalence of toxigenic fungi and mycotoxins in Arabic coffee (Coffea arabica): Protective role of traditional coffee roasting, brewing and bacterial volatiles
( Public Library of Science , 2021 , Article)Fungal infection and synthesis of mycotoxins in coffee leads to significant economic losses. This study aimed to investigate the prevalence of toxigenic fungi, their metabolites, and the effect of traditional roasting and ... -
Engineering of mutants of Anabaena PCC7120 (cyanobacterium) constructed by DNA-plasmid transfer and UV-radiation resistant to the herbicide Diuron capable of ammonia production
( Elfos Scientiae , Cuba , 2004 , Article)Ten mutants of Anabaena PCC7120 were successfully constructed to express two genetic traits, ammonia production and the resistance to the Diuron herbicide, using transposon induced mutagenesis and UV-radiation. The ranges ... -
Perspectives of future water sources in Qatar by phytoremediation: biodiversity at ponds and modern approach
( Bellwether Publishing, Ltd. , 2021 , Article Review)Anthropogenic and industrial wastewater (IWW) could be an additional future source of water to support the needs of the people of the State of Qatar. New lagoons have been built using modern technologies to optimize water ... -
Phytoremediation of polluted soils and waters by native Qatari plants: Future perspectives
( Elsevier , 2020 , Article Review)Because pollution is predicted to worsen and sources of quality water for agriculture and other human activities are limited, many countries have been motivated to seek novel water sources. Qatar relies on groundwater and ... -
Isolation, biochemical and molecular characterization of 2-chlorophenol-degrading Bacillus isolates
( Academic Journals , 2007 , Article)Pure cultures of 2-chlorophenol degrading bacteria were isolated from a natural enrichment that may be adapted to chlorophenols in the industrial zone at Umm-Saied city (Qatar). The bacteria were identified by 16S rDNA ... -
Investigation of heat-resistant antifungal agents from Bacillus amyloliquefaciens and Bacillus subtilis for biocontrol of mycotoxigenic fungi
( Elsevier , 2024 , Article)Fungal infections of food and feed with toxigenic strains results in the accumulation of harmful metabolites. In this study, the antifungal activity of two indigenous bacterial strains Bacillus amyloliquefaciens and Bacillus ... -
Introducing data-centric engineering to instrumented infrastructure
( ICE Publishing , 2019 , Conference Paper)A variety of methods exist in the structural health monitoring literature that aim to combine the observed data and predicted outputs from physics-based models (e.g. model updating and calibration). Typically implemented ... -
Evaluating prestress losses in a prestressed concrete girder railway bridge using distributed and discrete fibre optic sensors
( Elsevier , 2020 , Article)This paper evaluates the data collected during a comprehensive monitoring campaign aimed at capturing the prestress loss behaviour of four 11.9 m prestressed concrete beams. These beams formed part of the superstructure ... -
Pile defect assessment using distributed temperature sensing: fundamental questions examined
( SAGE Publications Ltd , 2024 , Article)Thermal integrity testing has been successfully used to assess the quality of cast-in-place piles for the past decade. It employs temperature data measured during concrete curing to identify defects along the piles' length. ... -
Simulation of axial tensile well deformation during reservoir compaction in offshore unconsolidated methane hydrate-bearing formation
( Elsevier , 2021 , Article)Sand production encountered in the 2013 offshore field gas production tests at the Nankai Trough, Japan, could be attributed to well failure during reservoir compaction. In this study, well integrity under various reservoir ... -
Monitoring of shaft excavations in clay
( ICE Publishing , 2019 , Conference Paper)Field observations of infrastructure performance, during and following construction, are vital for efficient design of infrastructure in subsequent projects. Fibre optic sensing technology offers considerable benefits ... -
Real-time statistical modelling of data generated from self-sensing bridges
( ICE Publishing , 2018 , Article)Instrumentation of infrastructure is changing the way engineers design, construct, monitor and maintain structures such as roads, bridges and underground structures. Data gathered from these instruments have changed the ... -
Experimental and numerical investigation of the performance of self-sensing concrete sleepers
( SAGE Publications Ltd , 2020 , Article)Prestressed concrete sleepers with built-in fibre optic-based sensing systems have recently been developed to capture performance data within railway networks and to provide critical decision-support information to route ... -
Applicability of construction dewatering techniques for randomly-fractured rock
( ICE Publishing , 2024 , Article)Through analyzing a significant number of case histories, ranges of applications of dewatering techniques for randomly-fractured rock are proposed in terms of the rock mass permeability and the required drawdown. The ...