Browsing Biological & Environmental Sciences by Title
Now showing items 156-175 of 856
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Closing a gap - First records of bryophytes from the Qatar Peninsula
( A.D.A.C. , 2018 , Article)The ephemeral or annual mosses Entosthodon fascicularis (Funariaceae), Microbryum starckeanum (Pottiaceae) and Pohlia melanodon (Mniaceae) were found in the understorey of natural Ziziphus nummularia shrubland in Qatar. ... -
Co-occurrence of mycotoxins in commercial formula milk and cereal-based baby food on the Qatar market
( Taylor and Francis Ltd. , 2018 , Article)The present study was conducted to explore the occurrence of mycotoxins in commercial baby foods in Doha-Qatar. LCMS/MS- and HPLC-based analysis of baby food (n?=?67) for 12 mycotoxins confirmed the presence of aflatoxin ... -
Coffee and its waste repel gravid Aedes albopictus females and inhibit the development of their embryos
( BioMed Central , 2015 , Article)Background Dengue is a prevalent arboviral disease and the development of insecticide resistance among its vectors impedes endeavors to control it. Coffee is drunk by millions of people daily worldwide, which is associated ... -
Collembola at three alpine subarctic sites resistant to twenty years of experimental warming
( Nature Publishing Group , 2015 , Article)This study examined the effects of micro-scale, site and 19 and 21 years of experimental warming on Collembola in three contrasting alpine subarctic plant communities (poor heath, rich meadow, wet meadow). Unexpectedly, ... -
Colorectal and Prostate Cancer Risk in Diabetes: Metformin, an Actor behind the Scene
( Ivyspring International Publisher , 2014 , Article)Both diabetes and cancer are prevalent diseases whose incidence rates are increasing worldwide, especially in countries that are undergoing rapid industrialization changes. Apparently, lifestyle risk factors including diet, ... -
Combating immunotoxicity of aflatoxin B1 by dietary carbon supplementation in broiler chickens
( Springer Science and Business Media Deutschland GmbH , 2021 , Article)Aflatoxin B1 (AFB1) is a secondary metabolite of some Aspergillus species that contaminate the agricultural commodities intended for animal and human consumption. The present in vivo study aimed to evaluate activated ... -
Combinatorial effect of Bacillus thuringiensis kurstaki and Photorhabdus luminescens against Spodoptera littoralis (Lepidoptera: Noctuidae).
( WILEY-VCH , 2014 , Article)Spodoptera littoralis, one of the major pests of many important crop plants, is more susceptible to Bacillus thuringiensis aizawai delta-endotoxins than to those of Bacillus thuringiensis kurstaki. Within the framework of ... -
Combinatorial effect of mutagenesis and medium component optimization on Bacillus amyloliquefaciens antifungal activity and efficacy in eradicating Botrytis cinerea
( Elsevier GmbH , 2017 , Article)This work is directed towards Bacillus amyloliquefaciens strain BLB371 metabolite production for biocontrol of fungal phytopathogens. In order to maximise antifungal metabolite production by this strain, two approaches ... -
Community and species-specific responses of plant traits to 23 years of experimental warming across subarctic tundra plant communities
( Nature Publishing Group , 2017 , Article)To improve understanding of how global warming may affect competitive interactions among plants, information on the responses of plant functional traits across species to long-term warming is needed. Here we report the ... -
Community structure and activity of a highly dynamic and nutrient-limited hypersaline microbial mat in Um Alhool Sabkha, Qatar
( Public Library of Science , 2014 , Article)The Um Alhool area in Qatar is a dynamic evaporative ecosystem that receives seawater from below as it is surrounded by sand dunes. We investigated the chemical composition, the microbial activity and biodiversity of the ... -
Comparative Analysis of Antifungal Activity of Total Phenolics from Different Date Palm Cultivars Against Five Phyto Pathogenic Fungi
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Introduction: Pathogen attacks impose natural selection on plants to evolve complex arrays of defensive strategies. Among the diverse defensive mechanisms evolved by plants to withstand pathogen attack, the ability to ... -
Comparative Assessment of Toxic Metals Bioaccumulation and the Mechanisms of Chromium (Cr) Tolerance and Uptake in Calotropis procera
( Frontiers Media S.A. , 2020 , Article)Progressive pollution due to toxic metals significantly undermines global environmental sustainability efforts. Chromium (Cr) is one of the most dangerous to human health. The use of plants to rid the environment of such ... -
Comparative chloroplast genomics of endangered euphorbia species: Insights into hotspot divergence, repetitive sequence variation, and phylogeny
( Multidisciplinary Digital Publishing Institute (MDPI) , 2020 , Article)Euphorbia is one of the largest genera in the Euphorbiaceae family, comprising 2000 species possessing commercial, medicinal, and ornamental importance. However, there are very little data available on their molecular ... -
Comparative skull analysis suggests species-specific captivity-related malformation in lions (Panthera leo)
( Public Library of Science , 2014 , Article)Lion (Panthera leo) populations have dramatically decreased worldwide with a surviving population estimated at 32,000 across the African savannah. Lions have been kept in captivity for centuries and, although they reproduce ... -
Comparative study of Bacillus thuringiensis Cry1Ia and Cry1Aa delta-endotoxins : activation process and toxicity against Prays oleae
( Elsevier Inc. , 2010 , Article)Cry1Ia and Cry1Aa proteins exhibited toxicities against Prays oleae with LC(50) of 189 and 116 ng/cm(2), respectively. The ability to process Cry1Ia11 protoxin by trypsin, chymotrypsin and P. oleae larvae proteases was ... -
Comparing connection to theory in Bachelor's theses: Old research university versus new regional university college
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Article)Quality of higher education is often assumed to be linked to the size of the faculty. Therefore, this study tested the hypothesis whether Bachelor's theses in ecology at a large, old research university would have more ... -
Comparison between nucleic acid amplification tests, antigen immunofluorescence assay, and in vitro infectivity in SARS-CoV-2 diagnosis.
( Springer , 2022 , Article)The number of SARS-CoV-2 detection tests requested to the laboratories has dramatically increased together with an urgent need to release reliable responses in a very short time. The two options taken into consideration ... -
Comparison GIS-Based interpolation methods for mapping groundwater quality in the state of Qatar
( Elsevier B.V. , 2021 , Article)Groundwater (GW) quality deterioration is one of the main water security issues in Qatar. GW in Qatar is over-exploited for agriculture activities that caused saltwater intrusion in the coastal areas and some inland GW. ... -
Comparison of antibody immune responses between BNT162b2 and mRNA-1273 SARS-CoV-2 vaccines in naïve and previously infected individuals.
( Oxford University Press , 2021 , Article)Two mRNA vaccines, Pfizer-BNT162b2 and Moderna-mRNA-1273, obtained the Emergency Use Listing by WHO for preventing COVID-19. However, little is known about the difference in antibody responses induced by these two mRNA ... -
A comparison of physiological and transcriptome responses to water deprivation and salt loading in the rat supraoptic nucleus
( American Physiological Society , 2015 , Article)Salt loading (SL) and water deprivation (WD) are experimental challenges that are often used to study the osmotic circuitry of the brain. Central to this circuit is the supraoptic nucleus (SON) of the hypothalamus, which ...