Study Assesses Impact of Climate Change on Silicate Carbon Weathering Sink
Written by AZoCleantechMay 17 2021
The global carbon cycle has been influenced by silicate carbon weathering sink (SCS) the net carbon sink for a period of more than millions of years. But the spatial pattern, magnitude, and evolution properties of global SCS are still not clear.
Spatial distribution (a) and latitudinal variation (b) of average annual silicate rock weathering carbon sink flux during 1996-2017. Image Credit: Institute of Geochemistry of the Chinese Academy of Sciences.
Under the guidance of Professor Xiaoyong Bai from the Institute of Geochemistry of the Chinese Academy of Sciences (IGCAS), a research group has estimated the magnitude and spatio-temporal distribution of global silicate rock weathering carbon sink flux (SCSF) for 1996–2017. They have also estimated the SCSF under two future greenhouse gas emission scenarios.
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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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
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IMAGE: Illustration of a tree representing the legume family tree with branches representing the six subfamilies. On each branch are flowers or pods of species belonging to the subfamilies. The lines. view more
Credit: Yiyong Zhao, Chien-Hsun Huang, and Hong Ma
The most comprehensive study of the family tree for legumes, the plant family that includes beans, soybeans, peanuts, and many other economically important crop plants, reveals a history of whole-genome duplications. The study also helps to uncover the evolution of genes involved in nitrogen fixation a key trait likely important in the evolutionary spread and diversification of legumes and vital for their use as green manure in agriculture. To reconstruct the family tree, researchers compared the DNA sequence of more than 1500 genes from 463 different legume species, including 391 newly sequenced species, that span the diversity of this large plant family.
Home > Press > Polarization-sensitive photodetection using 2D/3D perovskite heterostructure crystal
(a) Schematic structure of polarized light detector. (b) Photoconductivity parallel and perpendicular to the interface. (c) Photoconductivity anisotropy versus excitation power. (d) Angle-resolved photocurrent as a function of polarization angle measured at 405 nm under zero bias. (e) Experimental polarization ratios of some reported polarized light detectors. (f) Angle-dependent photocurrent of the present device measured at different temperature.
CREDIT
@Science China Press
Abstract:
Polarization-sensitive photodetectors, based on anisotropic semiconductors, have exhibited wide advantages in specialized applications, such as astronomy, remote sensing, and polarization-division multiplexing. For the active layer of polarization-sensitive photodetectors, recent researches focus on two-dimensional (2D) organic-inorganic hybrid perovskites, where inorganic slabs and organic spacer