College of Arts & Sciences: Recent submissions
Now showing items 261-280 of 3669
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Surface modification of poly(Lactic acid) film via cold plasma assisted grafting of fumaric and ascorbic acid
( MDPI , 2021 , Article)Plant-based materials have found their application in the packaging with a yearly growing production rate. These naturally biodegradable polymers are obtained from renewable and sustainable natural resources with reduced ... -
New combination of simple additive and entropy weighting criteria for the selection of best substitution box
( IOS Press BV , 2021 , Article)Substitution boxes (S-boxes) are among the most widely recognized and fundamental component of most modern block ciphers. This is on the grounds that they can give a cipher fortifying properties to oppose known and possible ... -
Classification of citrus plant diseases using deep transfer learning
( Tech Science Press , 2021 , Article)In recent years, the field of deep learning has played an important role towards automatic detection and classification of diseases in vegetables and fruits. This in turn has helped in improving the quality and production ... -
Semi-implicit Midpoint Rule for Convergence in Hyperbolic Metric Space
( Cambridge Scientific Publishers , 2021 , Article)Semi-implicit midpoint rule is a powerful numerical method for solving ordinary and partial differential equation. In this study we prove Strong and Δ-convergence of semi-implicit midpoint rule for nonexpansive mapping in ... -
Integration of Spatial and Frequency Domain Encryption for Digital Images
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)Transmission of multimedia data such as images, videos, and audio over the Internet is risky due to cyberattacks. To overcome the security issues, several encryption schemes are proposed over the last few decades which ... -
Carbon based sensors for air quality monitoring networks; middle east perspective
( Frontiers Media SA , 2024 , Article Review)IoT-based Sensors networks play a pivotal role in improving air quality monitoring in the Middle East. They provide real-time data, enabling precise tracking of pollution trends, informed decision-making, and increased ... -
The impact of online classes on sleep, physical activity, and cognition functioning among physical education students
( Frontiers Media SA , 2024 , Article)Introduction: Online education has become a crucial component of teachers' professional development, and universities incorporate innovative pedagogical approaches to enhance teachers' training. These approaches have proven ... -
The usefulness of session rating of perceived exertion for monitoring training load despite several influences on perceived exertion
( Human Kinetics Publishers Inc. , 2014 , Article Review)Despite various contributing factors, session rating of perceived exertion has the potential to affect a large proportion of the global sporting and clinical communities since it is an inexpensive and simple tool that is ... -
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 ... -
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, ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
Halophytes and associated properties of natural soils in the Doha area, Qatar
( Michigan State University Press , 2007 , Conference)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 ... -
Higher order self-adjoint operators with polynomial coefficients
( Texas State University - San Marcos , 2017 , Article)We study algebraic and analytic aspects of self-adjoint operators of order four or higher with polynomial coefficients. As a consequence, a systematic way of constructing such operators is given. The procedure is applied ... -
Acute and chronic toxicity assessments of 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) on the calanoid copepod Acartia clausi: Effects on survival, development, sex-ratio and reproduction
( Elsevier B.V. , 2022 , Article)Estrogens, such as the 17β-estradiol (E2) and the 17α-ethinylestradiol (EE2), have been regarded as a global threat to aquatic ecosystems due to their pseudo-persistence, their high estrogenic activity and their toxicity ...
