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Motion analysis of and experimental research on a magnetic and elastic coupling oscillation system.
Heliyon
July 2024
School of Physics, Changchun University of Science and Technology, Changchun, 130022, China.
To analyze the motion laws of a magnetic and elastic coupling system under the influence of various factors, this paper proposes a magnetic coupling pendulum based on spring pieces and magnets-a magnetic-mechanical oscillator. By fixing spring pieces onto two non-magnetic bases and attaching magnets to their upper ends, which repel each other, the potential energy during oscillation is expanded using Fourier series. Subsequently, Lagrange equations are solved to study the effects of the first two terms of potential energy.
View Article and Find Full Text PDFA streamlined proximity extension assay using POEGMA polymer-coated magnetic beads for enhanced protein detection.
Front Bioeng Biotechnol
November 2024
Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, United States.
Article Synopsis
- The study focuses on improving the detection of low-abundance protein biomarkers in biological fluids, which is crucial for diagnosing diseases and monitoring treatments.
- Traditional magnetic bead-based immunoassays have limitations such as complex processes of bead blocking and washing to avoid non-specific binding, which can increase the chance of errors.
- The researchers introduce a new method called magnetic proximity extension assay (MagPEA) employing POEGMA-coated beads, which eliminates the need for blocking and washing while maintaining high sensitivity in detecting proteins like IL-8.
Combinatory electric-field-guided deposition for spatial microparticles patterning.
Mater Today Bio
October 2024
Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, 230026, China.
Spatial deposition and patterning of microparticles are crucial in chemistry, medicine, and biology. Existing technologies like electric force manipulation, despite precise trajectory control, struggle with complex and personalized patterns. Key challenges include adjusting the quantity of particles deposited in different areas and accurately depositing particles in non-continuous patterns.
View Article and Find Full Text PDFEffects of natural Ionones and derived novel analogues with simplified structures on behavioral responses of whiteflies.
Pest Manag Sci
September 2024
Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, China.
Background: Whiteflies are major pests in agriculture, causing damage to crops and transmitting plant viruses. Using Volatile Organic Compounds (VOCs) as semiochemicals offers a sustainable approach for combating whiteflies. One such group of compounds, represented by β-ionone, has been found to possess repellent/attractant properties.
View Article and Find Full Text PDFCell Patterning Using Magnetic-Archimedes Strategy.
J Vis Exp
February 2024
Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine; State Key Laboratory of Transvascular Implantation Devices; Cardiovascular Key Laboratory of Zhejiang Province;
Cell patterning, allowing precise control of cell positioning, presents a unique advantage in the study of cell behavior. In this protocol, a cell patterning strategy based on the Magnetic-Archimedes (Mag-Arch) effect is introduced. This approach enables precise control of cell distribution without the use of ink materials or labeling particles.
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