Credit: KOU Wei
Researchers have recently extracted the proton mass radius from the experimental data.
A research group at the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences (CAS) presented an analysis of the proton mass radius in
Physical Review D on May 11. The proton mass radius is determined to be 0.67 ± 0.03 femtometers, which is obviously smaller than the charge radius of the proton.
In the Standard Model, the proton is a composite particle made of quarks and gluons and it has a non-zero size. The radius of the proton is a global and fundamental property of the proton. It is related to the color confinement radius a property governed by quantum chromodynamics (QCD).
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2+ ion flux and immune responses view more
Credit: BI et al.,
Cell
In plants, disease resistance proteins serve as major immune receptors that sense pathogens and pests and trigger robust defense responses. Scientists previously found that one such disease resistance protein, ZAR1, is transformed into a highly ordered protein complex called a resistosome upon detection of invading pathogens, providing the first clue as to how plant disease resistance proteins work. Precisely how a resistosome activates plant defenses, however, has been unclear.
A joint team led by Profs. ZHOU Jianmin, CHEN Yuhang and HE Kangmin at the Institute of Genetics and Developmental Biology of the Chinese Academy of Sciences and Prof. CHAI Jijie at Tsinghua University recently employed state-of-the-art electrophysiology and single-molecule imaging to investigate the molecular mechanism by which the ZAR1 resistosome activates plant immunity.
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Chinese Academy of Sciences
Recently, researchers from the Shanghai Institute of Optics and Fine Mechanics (SIOM) of the Chinese Academy of Sciences (CAS) have revealed the competitive behavior of bound electrons and free electrons in Epsilon-Near-Zero (ENZ) materials irradiated by ultrafast laser pulses.
They proposed the principle and method of synchronously tailoring the saturated absorption (SA) and reverse saturated absorption (RSA) of ENZ materials, which greatly broadened the ability to control the nonlinear optical response at the ENZ wavelength. Relevant study has been published in Photonics Research on April 15.
ENZ material means that in a specific wavelength range, the real part of the dielectric permittivity of the material approaches zero (ε~0). Theoretically, the limited dielectric permittivity change can obtain a great refractive index change. Therefore, compared with other nonlinear materials, ENZ materials have a larger nonlinear optical respo
Novel Metasurface can Realize Near-IR Full-Stokes Polarization Vectors Detection
Written by AZoOpticsMay 10 2021
Recently a research group from the Shanghai Institute of Optics and Fine Mechanics (SIOM) of the Chinese Academy of Sciences (CAS) performed numerical simulation and experimental demonstration of a pixelated metasurface based on the silicon-on-insulated (SOI) wafer.
Three-dimensional schematic of the pixel unit. The colors are used only for the distinguishment of the image and bear no wavelength information. (F0, F1, F2) and F3 represent linear polarizers and circular polarizer, respectively. Image Credit: Shanghai Institute of Optics and Fine Mechanics.
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Photonics Research journal on March 31
st, 2021.