7,620 results match your criteria: "Abdullah University of Science and Technology[Affiliation]"

In this paper, we define fractal synchronization () based on the idea of stochastic synchronization and propose a mathematical apparatus for estimating . One major advantage of our proposed approach is that fractal synchronization makes it possible to estimate the aggregate strength of the connection on multiple time scales between two projections of the attractor, which are time series with a fractal structure. We believe that one of the promising uses of is the assessment of the interdependence of encephalograms.

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Astrocytes play a pivotal role in maintaining brain energy homeostasis, supporting neuronal function through glycolysis and lipid metabolism. This review explores the metabolic intricacies of astrocytes in both physiological and pathological conditions, highlighting their adaptive plasticity and diverse functions. Under normal conditions, astrocytes modulate synaptic activity, recycle neurotransmitters, and maintain the blood-brain barrier, ensuring a balanced energy supply and protection against oxidative stress.

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Strong Bases Design: Key Techniques and Stability Issues.

Int J Mol Sci

August 2024

Computer, Electrical and Mathematical Science and Engineering Division, 4700 King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.

Theoretical design of molecular superbases has been attracting researchers for more than twenty years. General approaches were developed to make the bases potentially stronger, but less attention was paid to the stability of the predicted structures. Hence, only a small fraction of the theoretical research has led to positive experimental results.

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Amylin is part of the endocrine pancreatic system that contributes to glycemic control, regulating blood glucose levels. However, human amylin has a high tendency to aggregate, forming isolated amylin deposits that are observed in patients with type 2 diabetes mellitus. In search of new inhibitors of amylin aggregation, we undertook the chemical analyses of five marine macroorganisms encountered in high populations in the Red Sea and selected a panel of 10 metabolites belonging to different chemical classes to evaluate their ability to inhibit the formation of amyloid deposits in the human amylin peptide.

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The RNA Demethylases ALKBH5 and FTO Regulate the Translation of ATF4 mRNA in Sorafenib-Treated Hepatocarcinoma Cells.

Biomolecules

August 2024

Centre de Recherche du CHU de Québec-Université Laval, Axe Oncologie, Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada.

Translation is one of the main gene expression steps targeted by cellular stress, commonly referred to as translational stress, which includes treatment with anticancer drugs. While translational stress blocks the translation initiation of bulk mRNAs, it nonetheless activates the translation of specific mRNAs known as short upstream open reading frames (uORFs)-mRNAs. Among these, the ATF4 mRNA encodes a transcription factor that reprograms gene expression in cells responding to various stresses.

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Simultaneous lightwave information and power transfer (SLIPT), co-existing with optical wireless communication, holds an enormous potential to provide continuous charging to remote Internet of Things (IoT) devices while ensuring connectivity. Combining SLIPT with an omnidirectional receiver, we can leverage a higher power budget while maintaining a stable connection, a major challenge for optical wireless communication systems. Here, we design a multiplexed SLIPT-based system comprising an array of photodetectors (PDs) arranged in a 3 × 3 configuration.

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OsCYP706C2 diverts rice strigolactone biosynthesis to a noncanonical pathway branch.

Sci Adv

August 2024

Plant Hormone Biology Group, Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands.

Article Synopsis
  • Strigolactones are important for plant growth and communication in the soil, with rice producing various types of these compounds from its roots.
  • Researchers discovered a new type of strigolactone called 4-oxo-methyl carlactonoate (4-oxo-MeCLA) in rice root exudate and pinpointed specific enzymes involved in its production.
  • Mutant rice strains lacking these enzymes show altered root growth and slower mycorrhizal colonization, highlighting the complexity of strigolactone biosynthesis and its significance in plant development and symbiotic relationships.
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Wafer-scale transfer processes of 2D materials significantly expand their application space in scalable microelectronic devices with excellent and tunable properties through van der Waals (vdW) stacking. Unlike many 2D materials, wafer-scale transfer of MXene films for vdW contact engineering has not yet been reported. With their rich surface chemistry and tunable properties, the transfer of MXenes can enable enormous possibilities in electronic devices using interface engineering.

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Covalent Organic Framework Stabilized Single CoNCl Site Boosts Photocatalytic CO Reduction into Tunable Syngas.

Angew Chem Int Ed Engl

January 2025

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, P. R. China.

Solar carbon dioxide (CO) reduction provides an attractive alternative to producing sustainable chemicals and fuel. However, the construction of a highly active photocatalyst was challenging because of the rapid charge recombination and sluggish surface CO reduction. Herein, a unique Co-NCl single site was fabricated by loading Co species into the 2,2'-bipyridine and triazine-containing covalent organic framework (COF) for CO conversion into syngas under visible light irradiation.

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Organoborane reagents play a pivotal role as Lewis acids in acid-base pairs used in anionic polymerization and in other reactions; yet their high sensitivity to oxygen and moisture necessitates effective stabilization to prevent their oxidation and thus maintain their catalytic activity. In this study, we present novel encapsulation methods employing a cost-effective hexatriacontane (CH, C36) organogel to stabilize sensitive organoborane reagents, including triethyl borane (TEB) and a borinane-based ammonium salt (BNBr). These organoboranes encapsulated in stable, self-standing organogel blocks enable their safe handling in open laboratory environments without the need for a glovebox.

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Bicyclo[1.1.1]pentane (BCP), recognized as a bioisostere for para-disubstituted benzene, has gained widespread interest in drug development due to its ability to enhance the physicochemical properties of pharmaceuticals.

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Lipids play crucial roles in human biology, serving as energy stores, cell membranes, hormone production, and signaling molecules. Accordingly, their study under lipidomics has advanced the study of living organisms. 1-Dimensional (D) and 2D NMR methods, particularly 1D H and 2D H-H Total Correlation Spectroscopy (TOCSY), are commonly used in lipidomics for quantification and structural identification.

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The evolution of chemosensory receptors is key for the adaptation of animals to their environment. Recent knowledge acquired on the tri-dimensional structure of insect odorant receptors makes it possible to study the link between modifications in the receptor structure and evolution of response spectra in more depth. We investigated this question in palm weevils, several species of which are well-known invasive pests of ornamental or cultivated palm trees worldwide.

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Wheat genomics: genomes, pangenomes, and beyond.

Trends Genet

November 2024

Plant Science Program, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.

There is an urgent need to improve wheat for upcoming challenges, including biotic and abiotic stresses. Sustainable wheat improvement requires the introduction of new genes and alleles in high-yielding wheat cultivars. Using new approaches, tools, and technologies to identify and introduce new genes in wheat cultivars is critical.

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The indandione nucleus, is one of the most amazing nuclei in medicinal chemistry, is used to design new derivatives. Novel indandione derivatives are prepared with different electrophilic and nucleophilic reagents to yield , , , , , and . Compounds and are investigated against OVCAR-3 and HeLa, using LLC-MK2 and -Pt as references.

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Repair Engineering of Crystal Structure in van der Waals Materials by Probe Electron Beam.

Nano Lett

September 2024

School of Materials and Energy, or Electron Microscopy Centre of Lanzhou University, Lanzhou University, Lanzhou 730000, People's Republic of China.

The advancement of electronic technology has led to increasing research on performance and stability. Continuous electrical pulse stimulation can cause crystal structure changes, affecting performance and accelerating aging. Controlled repair of these defects is crucial.

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Anchorene, a carotenoid-derived growth regulator, modulates auxin homeostasis by suppressing GH3-mediated auxin conjugation.

J Integr Plant Biol

November 2024

National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, State Key Laboratory of Crop Stress Adaptation and Improvement, Henan Joint International Laboratory for Crop Multi-Omics Research, School of Life Sciences, Henan University, Kaifeng, 450046, China.

Article Synopsis
  • Anchorene is a special molecule that helps plants grow by affecting a hormone called auxin, which controls root development.
  • Scientists found out that anchorene works a lot like auxin and it can change how much auxin is active in the plant.
  • They discovered that anchorene stops certain proteins from making auxin less effective, which helps keep more auxin around for the plant to use and grow.
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The goal of this study is to investigate the application of fractional-order calculus in modeling arterial compliance in human vascular aging. A novel fractional-order modified arterial Windkessel model that incorporates a fractional-order capacitor (FOC) element is proposed to capture the complex and frequency-dependent properties of arterial compliance. The model's performance is evaluated by verifying it using data collected from three different human subjects, with a specific focus on aortic pressure and flow rates.

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Electrocatalytic hydrogen evolution reaction (eHER) is crucial in addressing the growing global energy demand. Although nickel-pincer-based molecular complexes, varying in donor atoms, were studied previously for eHER, the impact of variations in the substituents attached to the donor atoms was not investigated. Herein, three air-stable PNP-based Ni-pincer complexes [R1=R2=Ph (7); R1=R2=Bu (9); R1=Bu, R2=Ph (10)], varying solely in P-substituents, were studied in acetonitrile.

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Molecular architecture of mammalian pyruvate dehydrogenase complex.

Protein Cell

January 2025

Tsinghua-Peking Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing 100084, China.

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Electronic regulation of hcp-Ru by d-d orbital coupling for robust electrocatalytic hydrogen oxidation in alkaline electrolytes.

J Colloid Interface Sci

January 2025

Guangxi Key Laboratory of Low Carbon Energy Materials, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China. Electronic address:

Bimetallic alloys hold exceptional promise as candidate materials because they offer a diverse parameter space for optimizing electronic structures and catalytic sites. Herein, we fabricate ruthenium-cobalt alloy nanoparticles uniformly dispersed within hollow mesoporous carbon spheres (hcp-RuCo@C) via impregnation and pyrolysis strategies. The intriguing hollow mesopore structure of hcp-RuCo@C facilitates efficient contact between active sites and reactants, thereby accelerating hydrogen oxidation reaction (HOR) kinetics.

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The Changes of Microbial Diversity and Isolation of Microorganism in Soil for Alleviating the Production Decreasing After Continuous Cultivation of Ganoderma lucidum.

Curr Microbiol

August 2024

National Engineering Research Centre of Edible Fungi, Key Laboratory of Applied Mycological Resources and Utilisation, Ministry of Agriculture, Institute of Edible Fungi, Shanghai Academy of Agriculture Sciences, 1000 Jinqi Road, Shanghai, 201403, China.

Ganoderma lucidum is a medicinal mushroom usually cultivated in logs and covered with soil. Its production decreases after continuous cultivation. Changes of microbial diversity in soil are suggested to be one of the reasons.

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Designing a high-performance cathode is essential for the development of proton-conducting solid oxide fuel cells (H-SOFCs), and nanocomposite cathodes have proven to be an effective means of achieving this. However, the mechanism behind the nanocomposite cathodes' remarkable performance remains unknown. Doping the Co element into BaZrO can result in the development of BaCoO and BaZrCoO nanocomposites when the doping concentration exceeds 30%, according to the present study.

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Bioimaging and prospects of night pearls-based persistence phosphors in cancer diagnostics.

Exploration (Beijing)

August 2024

Key Laboratory of Rare Earths Chinese Academy of Sciences Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou China.

Inorganic persistent phosphors feature great potential for cancer diagnosis due to the long luminescence lifetime, low background scattering, and minimal autofluorescence. With the prominent advantages of near-infrared light, such as deep penetration, high resolution, low autofluorescence, and tissue absorption, persistent phosphors can be used for deep bioimaging. We focus on highlighting inorganic persistent phosphors, emphasizing the synthesis methods and applications in cancer diagnostics.

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Controlled growth of asymmetric chiral TeOx for broad-spectrum, high-responsivity and polarization-sensitive photodetection.

J Chem Phys

August 2024

Hunan Key Laboratory of Nanophotonics and Devices, School of Physics, Central South University, Changsha 410083, People's Republic of China.

Low-dimensional nanostructures, especially one-dimensional materials, exhibit remarkable anisotropic characteristics due to their low symmetry, making them promising candidates for polarization-sensitive photodetection. Here, we present a chemical vapor deposition synthesis method for tellurium suboxide (TeOx), confirming the practicality of photodetectors constructed from TeOx nanowires (NWs) in high-responsivity, broadband, and polarization-sensitive detection. By precisely controlling the thermodynamics and kinetics of TeOx NWs growth, we achieve large-scale growth of TeOx NWs with highly controllable dimensions and propose a method to induce intrinsic built-in strain in TeOx NWs.

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