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Biological Activities and Chemical Composition of Methanolic Extracts of Selected Autochthonous Microalgae Strains from the Red Sea
(
MDPI AG
, 2015 , Article)
Four lipid-rich microalgal species from the Red Sea belonging to three different genera (Nannochloris, Picochlorum and Desmochloris), previously isolated as novel biodiesel feedstocks, were bioprospected for high-value, ...
Bordetella pertussis risA, but not risS, is required for maximal expression of Bvg-repressed genes
(
American Society for Microbiology
, 2005 , Article)
Expression of virulence determinants by Bordetella pertussis, the primary etiological agent of whooping cough, is regulated by the BvgAS two-component regulatory system. The role of a second two-component regulatory system, ...
Opposing calcium-dependent signalling pathways control skeletal muscle differentiation by regulating a chromatin remodelling enzyme
(
Nature Publishing Group
, 2015 , Article)
Calcium signalling is important for differentiation-dependent gene expression, but is also involved in other cellular functions. Therefore, mechanisms must exist to distinguish calcium signalling relevant to differentiation. ...
Constituents of plants growing in qatar xxv flavonoids of Picris Radicata (forssk.) Less.
(
Qatar University
, 1994 , Article)
Four flavonoids were isolated from the plant and were identified as apigenin, chrysin 7-glucoside, leuteoline and luteolin 7-glucoside.
Hot and Hypoxic environments inhibit simulated soccer performance and exacerbate performance decrements when combined
(
Frontiers Media S.A.
, 2016 , Article)
The effects of heat and/or hypoxia have been well-documented in match-play data.However,large match-to match variation for key physical performance measures makes environmental inferences difficult to ascertain from soccer ...
A 6th-order local approximation by a cubic curve
(
Qatar University
, 1997 , Article)
We derive and present a MAPLE program for the construction of a parametric cubic polynomial curve which has sixth-order contract with a given smooth curve at a given point, thus providing a local sixth-order approximation ...
Volatile Components of the Phaeophyceae Hormophysa cuneiformis Growing Along Qatar Coasts
(
Qatar University
, 2007 , Article)
The present work deals with the study on volatile compounds from the brown alga Hormophysa cuneiformis collected from the Northwest coast of Qatar on May 2002. Two extraction methods have been used: conventional hydrodistillation ...
Cadmium-induced endothelial dysfunction mediated by asymmetric dimethylarginine.
(
Springer
, 2020 , Article)
Cadmium (Cd) is a naturally occurring toxic heavy metal with no known essential biological functions. Exposure to Cd increases the risk of cardiovascular disease by disrupting vascular homeostasis at the endothelium. The ...
Constituents Of Green Beans Phaseolus Vulgaris (Lipids And Flavonoids)
(
Qatar University
, 1992 , Article)
Chemical study of the lipid fraction resulted in the isolation and identification of a hydrocarbon fraction (n-Czg -0-033); an aliphatic alcohol fraction (C^, Czp, €30) and a sterol fraction (stigmasterol and sitosterol). ...
Developmental Stages of the Acquisition of Negation and interrogation by Children Native Speakers of Qatari Dialect
(
Qatar University
, 2002 , Article)
The developmental stages of Qatari Dialect interrogatives and negatives are described in this paper. Four children were included in this study, ranging in age from one year and six months to nine years. According to the ...