Publications by authors named "Q A Ahmed"

Our earlier research demonstrated α-glucosidase inhibitory (AGI) and antioxidant activities of the optimised extract of leaves. It was reported having numerous compounds, although it was unclear which compounds exhibit the bioactivities as well as their binding interaction to the enzyme. This study aimed to identify the compounds possessing AGI and antioxidant activities in the extract utilising GC-MS-based metabolomics, and to analyse the ligand-enzyme binding interactions molecular docking.

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  • - This report documents the first sighting of Actinopyga spinea in the intertidal zone of Balochistan, Pakistan, located in the northern Arabian Sea.
  • - The study includes detailed information about the species’ taxonomic characteristics, which help in identifying it.
  • - Additionally, it discusses the habitat where Actinopyga spinea is found and its distribution in this region.
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  • The study showcases a new method for synthesizing α-substituted propargylamides and β-acylamino ketones without using metals, leveraging nitriles, aldehydes, and terminal alkynes.
  • It utilizes BF·EtO as a Lewis acid, which provides greater control over the reaction outcomes by adjusting its concentration for better selectivity and product formation.
  • This method shows strong compatibility with various nucleophiles, allowing for the creation of multiple useful compounds, enhancing tools in organic chemistry synthesis.
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An expedient solvent-free synthesis of 2-deoxy-2-bromo-hexopyrano-β-nucleosides stereo- and regioselectively from protected glycals and unactivated nucleobases using cheaper and easily available reagent systems has been developed. The synthesis is mediated by a Lewis acid and is solvent-free. The substrate scope of the reaction was analysed with ether, ester and silyl-protected glycals as donors and different pyrimidine and purine bases were taken into consideration.

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  • - This paper surveys the latest advancements in UAV-based antennas and propagation measurements, emphasizing the flexibility and cost-effectiveness of UAVs for electromagnetic field assessments across various applications, including large-scale antenna testing for 5G/6G networks.
  • - It discusses the technical challenges, such as positioning accuracy and antenna alignment, while examining factors that contribute to measurement inaccuracies (0.5 to 1 dB), including GPS errors, UAV vibrations, and ground reflections.
  • - The study highlights simulations conducted to understand propagation losses in UAV-to-ground links and concludes with recommendations for future research to enhance the accuracy of antenna measurements and optimize UAV capabilities in this field.
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