Publications by authors named "Ruihan Guo"

For first-order phase transitions, the second derivatives of Gibbs free energy (specific heat and compressibility) diverge at the transition point, resulting in an effect known as super-elasticity along the pressure axis, or super-thermicity along the temperature axis. Here we report a chemical analogy of these singularity effects along the atomic doping axis, where the second derivative of Gibbs free energy (chemical susceptibility) diverges at the transition point, leading to an anomalously high energy barrier for dopant diffusion in co-existing phases, an effect we coin as super-susceptibility. The effect is realized in hydrogen diffusion in vanadium dioxide (VO) with a metal-insulator transition (MIT).

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. Magnetoencephalography (MEG) shares a comparable time resolution with electroencephalography. However, MEG excels in spatial resolution, enabling it to capture even the subtlest and weakest brain signals for brain-computer interfaces (BCIs).

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Biological nervous systems rely on the coordination of billions of neurons with complex, dynamic connectivity to enable the ability to process information and form memories. In turn, artificial intelligence and neuromorphic computing platforms have sought to mimic biological cognition through software-based neural networks and hardware demonstrations utilizing memristive circuitry with fixed dynamics. To incorporate the advantages of tunable dynamic software implementations of neural networks into hardware, we develop a proof-of-concept artificial synapse with adaptable resistivity.

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In the field of biomagnetic measurements, one of the most important recent challenges is to perform measurements in a magnetically unshielded environment. This first requires that atomic magnetometers can operate in a finite magnetic field, and have enough high sensitivity. To meet these requirements, we develop a light-narrowed parametric resonance (LPR) magnetometer.

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Hepatitis B Virus (HBV) infection may lead to various liver diseases such as cirrhosis, end-stage liver complications, and Hepatocellular carcinoma (HCC). Patients with existing cirrhosis or severe fibrosis have an increased chance of developing HCC. Consequently, lifetime observation is currently advised.

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Paeoniflorin (PF) has a certain therapeutic effect on cholestasis liver injury. To further improve the bioavailability of PF and play its pharmacological role in liver protection, PF-phospholipid complex micelles (PF-PLC micelles) were prepared based on our previous research on PF-PLC. The protective effects of PF and PF-PLC micelles on cholestasis liver injury induced by 17α-ethynylestradiol (EE) were compared, and the possible mechanisms were further explored.

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Article Synopsis
  • Formic acid (HCOOH) is a renewable and safe hydrogen carrier, but its catalytic dehydrogenation usually requires high temperatures.
  • Research has shown that a catalyst made of platinum single atoms on tellurium nanowires (1.1%Pt/Te) can decompose HCOOH to produce hydrogen at room temperature with high efficiency, achieving a turnover frequency of 3070 h.
  • The enhanced catalytic activity is attributed to a unique plasmonic hot-electron mechanism, which boosts the reaction rate by directly injecting hot electrons into the HCOOH molecules during the process.
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Article Synopsis
  • The study identifies PSD95 as a novel binding protein for the Mas receptor, revealing their interaction involves the Mas C-terminus and specific amino acids necessary for binding.
  • PSD95 enhances Mas protein stability by inhibiting its degradation through the ubiquitin-proteasome pathway, suggesting a new mechanism for regulating Mas receptor levels.
  • The research provides insights into how PSD95 directly influences Mas receptor expression and stability, illustrating the importance of post-translational modifications in protein regulation.
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